2015 Analyst Day May 13, 2015 Forward-looking Statements > The reports, filings, and other public announcements of The Williams Companies, Inc. (Williams) and Williams Partners L.P. (WPZ) may contain or incorporate by reference statements that do not directly or exclusively relate to historical facts. Such statements are "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. We make these forward-looking statements in reliance on the safe harbor protections provided under the Private Securities Litigation Reform Act of 1995. You typically can identify forward-looking statements by various forms of words such as “anticipates,” “believes,” “seeks,” “could,” “may,” “should,” “continues,” “estimates,” “expects,” “forecasts,” “intends,” “might,” “goals,” “objectives,” “targets,” “planned,” “potential,” “projects,” “scheduled,” “will,” “assumes,” “guidance,” “outlook,” “in service date” or other similar expressions. These forward-looking statements are based on management's beliefs and assumptions and on information currently available to management and include, among others, statements regarding: – Expected levels of cash distributions by WPZ with respect to general partner interests, incentive distribution rights, and limited partner interests – The levels of dividends to Williams stockholders – Future credit ratings of Williams and WPZ – Amounts and nature of future capital expenditures – Expansion and growth of our business and operations – Financial condition and liquidity – Business strategy – Cash flow from operations or results of operations – Seasonality of certain business components – Natural gas, natural gas liquids, and olefins prices, supply, and demand; and – Demand for our services > Forward-looking statements are based on numerous assumptions, uncertainties and risks that could cause future events or results to be materially different from those stated or implied in this presentation. Many of the factors that will determine these results are beyond our ability to control or predict. Specific factors that could cause actual results to differ from results contemplated by the forward-looking statements include, among others, the following: – – – – ii Whether WPZ will produce sufficient cash flows to provide the level of cash distributions we expect Whether Williams is able to pay current and expected levels of dividends Availability of supplies, market demand, and volatility of prices Inflation, interest rates, and fluctuation in foreign exchange rates and general economic conditions (including future disruptions and volatility in the global credit markets and the impact of these events on customers and suppliers) Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. Forward-looking Statements (cont’d) – The strength and financial resources of our competitors and the effects of competition – Whether we are able to successfully identify, evaluate and execute investment opportunities – Our ability to acquire new businesses and assets and successfully integrate those operations and assets into our existing businesses as well as successfully expand our facilities – Development of alternative energy sources – The impact of operational and developmental hazards and unforeseen interruptions – Costs of, changes in, or the results of laws, government regulations (including safety and environmental regulations), environmental liabilities, litigation, and rate proceedings – Williams’ costs and funding obligations for defined benefit pension plans and other postretirement benefit plans – WPZ’s allocated costs for defined benefit pension plans and other postretirement benefit plans sponsored by its affiliates – Changes in maintenance and construction costs – Changes in the current geopolitical situation – Our exposure to the credit risk of our customers and counterparties – Risks related to financing, including restrictions stemming from debt agreements, future changes in credit ratings as determined by nationally-recognized credit rating agencies and the availability and cost of capital – The amount of cash distributions from and capital requirements of our investments and joint ventures in which we participate – Risks associated with weather and natural phenomena, including climate conditions – Acts of terrorism, including cybersecurity threats and related disruptions and – Additional risks described in our filings with the Securities and Exchange Commission (SEC) > Given the uncertainties and risk factors that could cause our actual results to differ materially from those contained in any forward- looking statement, we caution investors not to unduly rely on our forward-looking statements. We disclaim any obligations to and do not intend to update the above list or announce publicly the result of any revisions to any of the forward-looking statements to reflect future events or developments > In addition to causing our actual results to differ, the factors listed above may cause our intentions to change from those statements of intention set forth in this presentation. Such changes in our intentions may also cause our results to differ. We may change our intentions, at any time and without notice, based upon changes in such factors, our assumptions, or otherwise > Investors are urged to closely consider the disclosures and risk factors in Williams’ and WPZ’s annual reports on Form 10-K filed with the SEC on Feb. 25, 2015, and each of our quarterly reports on Form 10-Q available from our offices or from our websites at www.williams.com and www.investor.williams.com iii Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. Agenda Continental Breakfast Welcome and Introductions John Porter CEO Perspective Alan Armstrong Access Midstream Bob Purgason Break Northeast Gathering & Processing Jim Scheel & John Seldenrust NGL & Petchem Services John Dearborn Break – Box Lunches iv West Walter Bennett Atlantic-Gulf Rory Miller Financial Outlook Don Chappel Closing Remarks Alan Armstrong Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. Alan Armstrong President & Chief Executive Officer May 13, 2015 CEO Perspective Today’s Focus DEMAND IS HERE AND GROWING A - 2 Analyst Day 2015 | May 13, 2015 SHARP FOCUS ON EXECUTION AND TREMENDOUS GROWTH SOLID STRATEGY DELIVERING LONG-TERM VALUE © 2015 The Williams Companies, Inc. All rights reserved. CEO Perspective Demand is Here and Growing A - 3 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. CEO Perspective Natural Gas Demand Pull Across All Regions and Sectors CUMULATIVE DEMAND GROWTH BY CENSUS REGION SINCE 2015, IN BCF/D 40 MARKET SECTOR DEMAND PULL THROUGH 2025, IN BCF/D > Industrial 5.7 30 > Power 9.1 25 > Residential/Commercial 1.1 > Other 3.2 > Transport 2.0 35 20 15 10 5 > LNG exports 0 > Net Mexican Exports -5 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 West South Central East North Central Pacific Mountain New England South Atlantic Mid Atlantic West North Central East South Central Canada Source: Wood Mackenzie A - 4 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. 12.6 2.2 CEO Perspective Supply Continues to Grow, Led by Northeast; Poised to Meet Demand Growth CUMULATIVE NATURAL GAS PRODUCTION GROWTH BY REGION SINCE 2015 IN BCF/D 40 35 30 25 20 15 10 5 0 -5 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 Gulf Coast Northeast Rockies Mid-Continent Permian Fort Worth San Juan Gulf of Mexico West Coast WCSB Eastern Canada Arctic Source: Wood Mackenzie A - 5 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. CEO Perspective Natural Gas Production Continues to Rise Despite Depressed Prices US NATURAL GAS PRODUCTION VS. NATURAL GAS + NGL UPLIFT PRICE 75 $7 70 $6 $5 60 55 $4 50 45 320 Rigs 1-4-13 40 Jan-2013 May-2013 $3 273 Rigs 1-3-14 Sep-2013 US Dry Natural Gas Production (Bcf/d) Gas Price + NGL Uplift ($/MMBtu) Jan-2014 169 Rigs 5-01-15 May-2014 Sep-2014 Jan-2015 Henry Hub Natural Gas Spot Price ($/MMBtu) Source: EIA, Baker Hughes, Williams Research Note: March and April 2015 US dry natural gas production data based on Williams’ estimates A - 6 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. $2 $/MMBtu Bcf/d 65 CEO Perspective U.S. Natural Gas Remains Most Cost-effective Feedstock $/MMBtu $45 $40 $35 $30 $25 $20 $15 $10 $5 $0 1Q 2Q 3Q 4Q 2010 1Q 2Q 3Q 4Q 1Q 2011 Gas Ethane 2Q 3Q 4Q 2012 Propane 1Q 2Q 3Q 4Q 2013 Crude Ethylene 1Q 2Q 3Q 4Q 2014 Propylene Note: Historical CMAI Gulf Coast spot prices converted to a $/MMBtu basis. A - 7 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. CEO Perspective Natural Gas: Significant Advantages Across All Sectors If inefficient coal plants in the US were to retire, 7.3 Bcf/d of natural gas would be required By 2020, NA fertilizer projects could increase production by 24.7 million metric tons per year requiring an incremental 1.2 Bcf/d of natural gas demand NA methanol production is poised to increase by 13 million metric tons per year requiring 1.4 Bcf/d of natural gas If half of the Northeast US fuel oil use was displaced by natural gas, it would equate to roughly 800 MMcf/d of incremental natural gas A - 8 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. 1Q 2015 CEO Perspective Sharp Focus on Execution and Tremendous Growth A - 9 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. CEO Perspective Leaders Focused on Safe, Reliable Operations; Delivering Value > Performing above industry standards > Safety metrics embedded in annual incentive plans # INCIDENTS / 1,000 MILES RELEASE VOL (MCF GAS / MI) 0.8 6.5 6.4 5.8 4.9 0.5 0.4 0.4 2011 0.2 2012 2013 2014 0.0 WILLIAMS INDUSTRY WILLIAMS 0.3 0.4 INDUSTRY 0.4 0.4 4.4 4.2 2015* 2011 0.8 0.3 2012 0.0 2013 0.0 2014 * Through 3/31/15, annualized PHMSA reports a total mileage of interstate natural gas pipelines of approximately 320,267 (PHMSA website - accessed 5/4/2015) The numbers above are based on incidents reported to PHMSA under 49 CFR 191; An incident is an event where an unintentional release of natural gas results in: A death or personal injury resulting in hospitalization; Estimated property damage of $50,000 or more; Gas loss of 3 MMCF or more. A - 10 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. 2015* CEO Perspective Significant, Growth-oriented Assets Positioned Across Natural Gas Value Chain Approximately 30% U.S. Gas Volumes Touch Our Systems Transmission Pipelines and Storage Market Hub End User Natural Gas Ethylene Propylene Wellhead (onshore and offshore) Gathering Gas Processing Plants 17 Bcf/d 7 Bcf/d inlet Mixed Natural Gas Liquids 418 Mbbl/d Multiple Products Fractionation Facilities 233 Mbbl/d Storage 22 MMbbl Transmission Pipelines Olefins Plant 416 Mbbl/d (lbs/year) 475 Mbbl/d crude oil 1,950 MM ethylene 807 MM propylene Market Hub 395MM lbs ethylene storage 25 storage customers 9 exchange partners Figures represent 100% capacity for operated assets, including those in which Williams and/or WPZ have a share of ownership; NGL and derivatives storage includes capacity owned and under long-term lease; olefins-plant volumes are inclusive of Geismar, LA., facility at full operation and expansion. All data as of December 31, 2014. A - 11 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. CEO Perspective Williams Positioned to Benefit from Demand Increases Along Major Interstate Corridors Natural Gas Demand Growth in Bcf/d (2015–2025) 4.4 0.8 2.0 0.2 2.7 0.5 LEGEND 2.5 22.2 Transco corridor Williams’ pipeline corridors Other regions 0.7 Source: Wood Mackenzie A - 12 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. End User CEO Perspective Already Capturing 36% of Future Demand, 2015–2025 BCF/D Capacity3 Williams Project (in execution or negotiating) 8.3 Growth Available 22.2 Williams current share 36% Constitution (0.7 Bc/d) NE Connector (0.1 Bcf/d) / Rockaway Lateral1 New York Bay (0.1 Bcf/d) Leidy Southeast (0.5 Bcf/d) Garden State (0.5 Bc/d) Atlantic Sunrise (1.7 Bcf/d) CPV Woodbridge1 Virginia Southside I&II (0.5 Bcf/d) Hillabee Phase 1&2 (1.0 Bcf/d) Rock Springs (0.2 Bcf/d) Dalton Lateral (0.5 Bc/d) Gulf Connector (1.2 Bcf/d)2 Mobile Bay South III (0.2 Bcf/d) Gulf Trace (1.2 Bcf/d) 1 2 3 South Louisiana Market (0.2 Bcf/d) These projects are Firm Delivery Lateral Service and do not add mainline capacity. In negotiations with potential shippers. Does not include firm delivery lateral service projects A - 13 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. CEO Perspective Transition to Demand-driven Growth Demonstrated in Guidance and Beyond WMB/WPZ Pursuing Over $30 Billion of Growth Projects Supply Driven 2015 to 2017 > Gulfstar One > Kodiak > Northeast > CNRL Offgas* > Gunflint > Access G&P Supply & Demand Driven > Atlantic Sunrise > Constitution Pipeline Completed Projects Future Projects G&P 2018+ > Additional 2014 to 2015 ! = Completed Demand Driven > Rockaway Lateral > Leidy SE > Virginia Southside > Rock Springs > Dalton Lateral > Hillabee (Phase 1) > Mobile Bay South III > CPV Woodbridge > Gulf Trace > Garden State > Jackrabbit Propylene > Promesa* > Sabal Trail > Texas-to-Mexico > Parachute Plant > Continue Expansion in Dry Gas > Numerous demand- Gulfstars > Mexican offshore production facilities > Syncrude offgas > Access G&P Expansion > Various offshore tiebacks > Marcellus/ Utica supply to Transco Southeast markets NE PA to Meet Producers’ Growth > New Producers Opportunities for Utica and southern Marcellus > LMM Cantaral and Shamrock System Expansion > Additional Takeaway Projects > Gathering and Processing Opportunities in NW PA & NE OH driven Transco projects > Gulf market area expansions serving LNG and industrial customers > Pacific Connector ! Gulfstar One ! Keathley Canyon Connector ! NE: Frac II ! NE: Ethane line and de-ethanizer ! NE: Oak Grove TXP I ! Bucking Horse Plant In Progress; Potential / under negotiation A - 14 Analyst Day 2015 | May 13, 2015 (ownership option) export pipeline > Geismar 2* > PDH 1 & 2* > Washington Expansion > NGL & Petchem services – other* ! Geismar Expansion** ! Texas Belle* ! Bayou Ethane* * WMB projects expected to be dropped down to WPZ ** Currently in ramp-up © 2015 The Williams Companies, Inc. All rights reserved. CEO Perspective Solid Strategy Delivering Long-term Value A - 15 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. CEO Perspective WPZ Fee Revenues Projected to Increase Over $2.7 Billion as NGL Margins Decline 81% 2011 to 2015 (Dollars in Millions) $6,000 $5,000 C (20% ) AGR e 107% s crea es In u n e Rev Fee $4,000 $3,000 $0 NGL Margins $1,000 Fee Revenues $2,000 2011 2012 2013 2014 2015 FORECAST Note: Data does not include proportionate share of fee revenues or commodity margins from joint ventures A - 16 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. CEO Perspective Planning Williams 2015 Dividend of $2.38 with Annual Dividend Growth of Approximately 12.5% through 2017 CASH DIVIDENDS PER SHARE GROWTH 2010–2017 CAGR OF 30% ILLUSTRATIVE EXCESS CASH FLOW AVAILABLE & COVERAGE RATIO 1 (Millions) $3,000 $3.50 $3.01 $3.00 1.10x $2.68 1.06x $2.38 $2.50 $2,000 $1.96 $2.00 1.05x 1.20x Expected Dividends Paid $1.44 $1.50 Expected Cash Flow Available After Dividends $1.20 $1,000 $1.00 $0.78 $0.49 $0.50 $0 $0.00 2014 2010 2011 2012 2013 2014 2015 2016 2017 Actual 1 2015 2016 2017 Guidance Detailed illustrative dividend and coverage calculations are included in the presentation. A - 17 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. CEO Perspective Positioned to Connect Best Supplies to Best Markets; Capture Emerging Demand-side Opportunities WEST > Reliable operations across vast footprint > Significant volumes driving high-quality revenue > Well-positioned to feed growing demand pull NE GATHERING & PROCESSING > Extensive footprint to serve NE producers > Positioned to capture the value of significant investment ACCESS > High quality, scalable asset > Creating hubs to open the Marcellus/Utica to even more markets base in high growth unconventional plays > Low risk business model with 100% fixed-fee revenues with MVC, rate determination, cost of service and fee tier contracts ATLANTIC GULF > Growing demand driving rapid expansion NGL PETCHEM > Building fee-based cash flow to drive high quality revenue > Taking commodity exposure only when sustainably advantaged A - 18 Analyst Day 2015 | May 13, 2015 > Solid track record of execution > Unique capabilities in Gulf in a capital-constrained environment © 2015 The Williams Companies, Inc. All rights reserved. CEO Perspective Right Leaders in the Right Place to Execute Strategy Bob Purgason Access Jim Scheel NE Gathering & Processing John Dearborn NGL & Petchem Services Walter Bennett West Don Chappel Chief Financial Officer Sarah Miller Interim General Counsel John Seldenrust Access Eastern Operations A - 19 Analyst Day 2015 | May 13, 2015 Rory Miller Atlantic-Gulf © 2015 The Williams Companies, Inc. All rights reserved. Access Operating Area Bob Purgason Senior Vice President WPZ – Access Overview B - 2 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Access Growing High-return, Low-risk, Fee-based Business EXPANDING ASSET BASE High quality, scalable asset base in high growth unconventional plays B - 3 Analyst Day 2015 | May 13, 2015 LOW RISK BUSINESS MODEL 100% fixed-fee revenues with MVC, rate redetermination, cost of service and fee tier contracts OPERATIONAL EXCELLENCE Leading safety, reliability and environmental stewardship culture © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Access High Quality, Scalable Asset Base in High Growth Unconventional Plays Key Operating Data1 Dedicated Area: ~8.3MM acres Miles of Pipe: 6,829 Volume: 6.195 Bcf/d Horsepower: 698,743 1 Data as of quarter ended March 31, 2015. Volume represents the gross throughput for operated assets and net throughput allocated to the Partnership’s interest for non-operated assets. B - 4 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Access Leading Contract Structure – 100% Fixed Fee Barnett Mid-Continent Haynesville Permian Niobrara Eagle Ford Marcellus Utica Cost of Service Cost of Service Cost of Service (gathering)/ Fixed Fee (processing) Contract Structure MVC and Fee Redetermination Annual Fee Cost of Service/ Redetermination/ Fee Annual Fee Redetermination Fixed Fee with Redetermination MVC & Fee Tiers Term 20 Year Acreage Dedication 20 Year Acreage Dedication 10-20 Year Acreage Dedication 20 Year Acreage Dedication 20 Year Acreage Dedication 20 Year Acreage Dedication 15 Year Acreage Dedication 15-20 Year Acreage Dedication Dedicated Acreage1 900,000 1,550,000 550,000 400,000 300,000 1,400,000 1,500,000 1,600,000 Gas Gathered (MMcf/d)2 812 397 971 109 78 388 2,634 778 Invested Capital ($B) 2.0 0.7 1.4 0.4 0.2 1.4 1.7 1.2 Ownership3 100% 100% 100% Perm Op – 100% DBJV – 50% RWTX – 33% 50% 100% ~45% Cardinal – 66% UGS – 100% UEOM – 49% Cost of Service WPZ has agreed to purchase up to 21% additional interest in UEOM from EVEP 1 Dedicated Acreage in all regions represents the gross acres dedicated to WPZ and it’s partners. Gas Gathered represents the gross throughput for operated assets and net throughput allocated to the Partnership’s interest for non-operated assets. 3 WPZ is Operator of its Marcellus and Cardinal Joint Ventures. 2 B - 5 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Access Cost of Service IllustrationNear-Term Volume Reduction > 15–20 year fee calculated based on mid-teens return on invested capital > Long-term EBITDA growth part of contractual model > Fee recalculated annually for actual experience and revised forecast COST OF SERVICE STRUCTURE Near-term Volume Reduction Align Capital Spend with Volume Re-calculate Fee Based on Mid-teens Return Volume Levelized Fee ($/Mcf) CAPEX Cost of Service Structure Provides Long-term, Built-in EBITDA Growth B - 6 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Access Cost of Service IllustrationImproved Well Production > 15–20 year fee calculated based on mid-teens return on invested capital > Long-term EBITDA growth part of contractual model > Fee recalculated annually for actual experience and revised forecast COST OF SERVICE STRUCTURE Improved Well Production Align Capital Spend with Volume Re-calculate Fee Based on Mid-teens Return Volume Levelized Fee ($/Mcf) CAPEX Cost of Service Structure Provides Long-term, Built-in EBITDA Growth B - 7 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Access Access Integration B – 8 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Access The Overall Integration Program is Being Executed in Three Phases Phase 2 Phase 1 2014 (implemented 1/1/15) > Transitioned ACMP employees to WMB on January 1, 2015 > Launched integration of ACMP and WMB shared corporate functions (HR, IM/IT, F&A, Communication & Outreach, Legal) 2015 Phase 3 H2 2015 onward > Focus on integrating OE, E&C, EH&S, Supply Chain, > Focus on integration and CSD functional areas across 18 key initiatives of Operating Areas – Gas Purchasing – Drafting Standards – Security – Operational Risk Assessment – Gathering Compression Integration (GCI) – PLC/Unifier Integration – Gathering Lines – Construction Safety – SME Operational Support – EH&S and Regulatory – Maximo – Leverage Williams Scale – Commodity Services/ Volume Management – Supply Chain Integration – Maintenance > Continued implementation of integrated operating models across functional areas – Commercial Contract Oversight – Mechanical Integrity – Pipeline Risk & Integrity B - 9 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Access One Williams – One Maximo: Highlights > Identified cost savings of ~$2.4MM and reduction of 9 months of work to achieve One Williams, compared to alternatives (e.g. running parallel systems) > Single Site, Single Org will allow Access OA the opportunity to implement different configuration and design with deep dive deliverables > Leverage Williams’ implementation learnings and experience > Implementations will be in a mature system > Bring M&R processes, data and systems together to prevent continuous divergence and promote One Williams continuous improvement > Avoid 2017 change that would be required to normalize two systems > Use superior Williams Knowledge Management Portal > Opportunity to leverage mobility to Williams OA work groups and simplify Maximo 7.5 upgrade B - 10 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Access Modular Compression Facilities AUGUSTA FACILITY SLUG CATCHER B - 11 Analyst Day 2015 | May 13, 2015 DEHY TRAIN SKID © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Access Gathering Compression Integration Increased Speed to Market, Competitive & Predictable Cost, Reliable & Common Operations, Easy to Redeploy Legacy Access Standard Gathering Facility Approach B - 12 Analyst Day 2015 | May 13, 2015 Gathering Compression Integration (GCI) GEN-15 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Access Williams Compression – Enhancing Our Capabilities HIGHLIGHTS: HORSEPOWER > Current Service: Access Legacy Utica & 300,000 Marcellus gathering 200,000 > Owned HP: 188,800 > Serviced HP: 72,550 100,000 0 > Asset portfolio fits WPZ business model Q1-14 > Future expansion to other WPZ systems – 200,000 HP (Est) by 2017 > Enhances organizational capabilities > Accommodates greater efficiencies > Provides attractive expense savings through in-sourcing a key cost element B - 13 Analyst Day 2015 | May 13, 2015 Q2-14 Q3-14 Owned HP Q4-14 Serviced HP INFRASTRUCTURE Region Utica Owned HP 52,830 Serviced HP 72,430 Region Marcellus Owned HP 135,970 Serviced HP 120 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Access Franchise Snapshots B - 14 Analyst Day 2015 | May 13, 2015 Q1-15 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Access 2016 Central Operating Area For 2015 Included in Access Operating Area MISSISSIPPI LIME GRANITE WASH/ COLONY WASH WOLFBERRY BARNETT HAYNESVILLE DELAWARE (PERMIAN) EAGLE FORD B - 15 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Access Barnett – Long-term Value Basin HIGHLIGHTS: DAILY VOLUME (MMcf/d) > Product: Dry Gas > Services: Gathering, Compression, & Treating 1,400 1,200 1,000 800 600 > Volume: 812 MMcf/d > Major Producers: Chesapeake Energy Total Gas & Power 400 200 0 Q1-13 Q2-13 Q3-13 Q4-13 Q1-14 Q2-14 Q3-14 Q4-14 Q1-15 Barnett > Long-term acreage dedication > Large inventory of remaining drilling locations > Potential upside from increased gas demand > Contractual protections $2.0B Invested Capital B - 16 Analyst Day 2015 | May 13, 2015 MVC CONTRACT & INFRASTRUCTURE Gas Gathering Systems 25 Pipelines 859 Miles Compression 114,790 HP System Capacity 950 MMcf/d Dedication 900,000 Acres Contract Structure MVC & Fee Redetermination Contract Term 20 Years (2029) Ownership 100% WPZ © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Access Mid-Continent – Vast Gathering Infrastructure HIGHLIGHTS: > Product: DAILY VOLUME (MMcf/d) Associated Gas (Oil) & Lean Gas > Services: Gathering, Compression, & Treating > Volume: 397 MMcf/d > Regions: Miss-Lime, Granite Wash, Colony Wash > Long-term acreage dedication > Contractual protection through fee redetermination > Growth potential from additional producers $0.7B Invested Capital 531 479 504 486 470 456 443 426 397 Q1-13 Q2-13 Q3-13 Q4-13 Q1-14 Q2-14 Q3-14 Q4-14 Q1-15 CONTRACT & INFRASTRUCTURE Gas Gathering Systems 106 Pipelines 2,247 Miles Compression 100,533 HP System Capacity 945 MMcf/d Dedication 1,550,000 Acres Contract Structure Annual Fee Redetermination Contract Term 20 Years (2029) Ownership 100% WPZ B - 17 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Access Haynesville – Prolific Dry Gas Basin HIGHLIGHTS: DAILY VOLUME (MMcf/d) > Product: Dry Gas > Services: Gathering, Compression, & Treating > Volume: 971 MMcf/d > Long-term acreage dedication 1,200 900 600 300 0 Q1-13 Q2-13 Q3-13 Q4-13 Q1-14 Q2-14 Q3-14 Q4-14 Q1-15 > Contractual protection through MVC & fee structure > Significant growth potential from LNG exports Springridge Mansfield CONTRACT & INFRASTRUCTURE Gas Gathering Systems Pipelines Compression System Capacity Dedication Contract Structure Contract Term $1.4B Invested Capital Ownership B - 18 Analyst Day 2015 | May 13, 2015 Mansfield MVC 7 591 Miles 17,713 HP 1,650 MMcf/d 550,000 Acres Fixed Fee with MVC, Fee Redetermination, and Fee Tiers Springridge - 10 Years (2020) Mansfield - 20 Years (2032) 100% WPZ © 2015 The Williams Companies, Inc. All rights reserved. Total WPZ – Access Permian – Liquids-rich Gathering & Processing HIGHLIGHTS: > Product: NET DAILY VOLUME (MMcf/d) Associated Gas (Oil), Wet Gas, & Dry Gas > Services: Gathering, Compression, Treating, & Processing > Volume: 109 MMcf/d (Net) 109 89 80 77 110 111 109 94 79 > Long-term dedication > Significant upside from multiple profitable zones > Development of processing solutions PERMIAN NON-OPERATED Gas Gathering Systems Pipelines Contract Structure Contract Term Ownership 1 242 Miles Cost of Service Ranch Westex - 10 years (2021) DBJV - 18 years (2025) Ranch Westex - 33% DBJV - 50% $0.4B Invested Capital Q1-13 Q2-13 Q3-13 Q4-13 Q1-14 Q2-14 Q3-14 Q4-14 Q1-15 PERMIAN OPERATED Gas Gathering Systems Pipelines Compression System Capacity Dedication Contract Structure Contract Term Ownership B - 19 Analyst Day 2015 | May 13, 2015 14 346 Miles 18,375 HP 85 MMcf/d 400,000 Acres Annual Fee Redetermination, Cost of Service 20 Years (2029) 100% WPZ © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Access Eagle Ford – Key Liquids-rich Basin HIGHLIGHTS: > Product: DAILY VOLUME (MMcf/d) Associated Gas (Oil) & Wet Gas 348 295 > Services: Gathering, Compression, & Treating > Volume: 388 MMcf/d 258 271 267 376 388 292 228 > State-of-the-art sour gas treating facility > Large footprint with significant capacity > Strong upside potential from numerous producers and profitable zones $1.4B Invested Capital B - 20 Analyst Day 2015 | May 13, 2015 Q1-13 Q2-13 Q3-13 Q4-13 Q1-14 Q2-14 Q3-14 Q4-14 Q1-15 CONTRACT & INFRASTRUCTURE Gas Gathering Systems 12 Pipelines 971 Miles Compression 101,892 HP System Capacity 687 MMcf/d Dedication 1,400,000 Acres Contract Structure Cost of Service Contract Term 20 Years (2032) Ownership 100% WPZ © 2015 The Williams Companies, Inc. All rights reserved. WPZ- Access Eagle Ford – The Fox Creek Gathering and Treating Expansion Highlights: " Expands gathering & treating footprint in Eagle Ford " Gathering – Minimum Volume Commitment " Treating – Cost of Service with mid-teens return " Purchase of existing assets " Approximately 140 existing miles of 6”, 8” & 12” pipelines " 100 MMcfd Sour Gas Compression Facility " Expansion of system to accommodate future volumes " Construction of a Sour Gas Treating Facility B - 21 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Access Growth Outlook B - 22 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Access Strong Fundamentals and Competitive Advantages Drive Robust, Visible Growth Access Midstream Growth Investment Opportunities 2015–2020 WPZ / WMB Pursuing Over $30 Billion of Project Opportunities !! In guidance1 Growth Opportunities Include: !! Under negotiation > Business Development !! Potential NGL & Petchem (WPZ) NGL & Petchem (WMB) West (WPZ) Growth – New producer opportunities Northeast G&P (WPZ) Access Northeast (WPZ) – Expanding processing – Bolt-on acquisitions > Contractual Growth Access Midstream (WPZ) – Escalating minimum volume commitments Atlantic-Gulf (WPZ) – Long-term cost of service fee structures 1 Guidance presented here is at the midpoint of ranges. B - 23 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Access Access Midstream Summary > Expanding asset base > Low risk business model > Operational excellence > Growing high-return, low- risk, fee-based business B - 24 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. Northeast G&P Jim Scheel Senior Vice President John Seldenrust Senior Vice President WPZ – Northeast G&P Overview C - 2 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Northeast G&P Large-Scale Position Connects Best Basins to Best Markets LARGE-SCALE INFRASTRUCTURE IN PLACE Extensive footprint serving Marcellus, Utica producers C - 3 Analyst Day 2015 | May 13, 2015 POSITIONED TO CAPTURE VALUE OF SIGNIFICANT INVESTMENT Marcellus/Utica long-term growth outlook is strong FOCUSED ON DELIVERING OPTIMAL VALUE Creating gas/NGL hubs to provide producers with access to best markets © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Northeast G&P Legacy Williams Footprint: Large-scale Infrastructure Established in Marcellus, Utica NW PA and NE Ohio/TRM Susquehanna Supply Hub > 530,000 dedicated acres > ~3 Bcf/d takeaway capacity Blue Racer Midstream 1, 2 Laurel Mountain Midstream 1, 2 > 1.5 Bcf/d gathering capacity > 1.0 Bcf/d processing capacity > ~700 MMcf/d gathering > ~125 Mbpd fractionation capacity Ohio Valley Midstream > 0.7 Bcf/d processing capacity > ~80 Mbpd fractionation/ de-ethanization 1 2 Represents 2015 estimated capacity at year end LMM, Blue Racer Midstream are partially owned systems; amount shown reflect 100% C - 4 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Northeast G&P Access Integration Enhances Large-Scale Position Bradford MN1 > 3.0 Bcf/d gathering exit capacity Utica Midstream 1, 2 > 1.0 Bcf/d gathering exit capacity > 0.8 Bcf/d processing capacity > ~135 Mbpd fractionation capacity Marcellus South 1 > 0.7 Bcf/d gathering capacity 1 2 Represents 2015 estimated capacity at year end Utica Midstream is partially owned; amount shown reflects 100% C - 5 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Northeast G&P Combined Position to Serve Marcellus, Utica Wet/Dry Gas Susquehanna Supply Hub NW PA and NE Ohio/TRM Bradford Supply Hub Blue Racer Midstream1 Utica Supply Hub1 Ohio River Supply Hub > Ohio Valley Midstream > Laurel Mountain Midstream1 > Marcellus South 1 LMM, Blue Racer and Utica Supply Hub are partially owned systems. Blue Racer and a portion of Utica Supply Hub is not operated by Williams. C - 6 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Northeast G&P Franchise Snapshots C - 7 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Northeast G&P NE PA Footprint: Heart of Low-Cost Marcellus Market Remains Constrained by Takeaway Capacity Constitution m Millenniu Bradford Supply Hub Susquehanna Supply Hub essee Tenn Atlantic Sunrise Wyoming c Trans C - 8 Analyst Day 2015 | May 13, 2015 o © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Northeast G&P Susquehanna Supply Hub Large-scale Gathering System in Northeast PA SIGNIFICANT SUPPLY HUB WITH ACCESS TO EAST COAST MARKETS Constitution > Access to 3 Bcf/d* of takeaway capacity into 3 major interstate pipelines m nniu Mille – Transco, Tennessee, Millennium > Future expansions will deliver into Constitution and Atlantic Sunrise EXPANDING GAS GATHERING SYSTEM TO MEET PRODUCERS’ DRILLING PLANS essee Tenn Wyoming > Key customers c Trans o – Cabot – Southwestern Energy – Carrizo-Reliance Atlantic Sunrise > Large-scale build out * Excludes Constitution, estimated in-service date is 2016 C - 9 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Northeast G&P Bradford Supply Hub Largest Gathering Footprint in the Dry Marcellus ANOTHER SIGNIFICANT SUPPLY HUB Constitution > 2.6 Bcf/d System capacity (3.0 Bcf/d by 2015 year end) > 39% WPZ owned and operated m nniu Mille > 600,000 acres dedicated EXPANDING GAS GATHERING SYSTEM TO MEET PRODUCERS’ DRILLING PLANS e Tenn ssee Wyoming > Key customers co Trans – Andarko – Epsilon – Chesapeake – Mitsui – Chief – Statoil Atlantic Sunrise > Large-scale build out C - 10 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Northeast G&P Susquehanna and Bradford Supply Hub Canada tion stitu Con + ssee Tenne Northeast Markets TRANSCO + Bradford SSH Atlantic SCO Sunrise TRAN + Southeast Markets Gulf Coast Existing Proposed Local Markets + Expansion Proposed or In Progress C - 11 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Northeast G&P Utica Supply Hub Vertically Integrated in Rapidly Expanding Basin LEADING ASSETS POSITIONED TO SERVE PRODUCERS IN THE WET & DRY UTICA > Integrated from wellhead to fractionation > 1,650,000 acres dedicated Cardinal Gathering System: > Gathering and Compression 0.9 Bcf/d > 66% WPZ owned > WPZ operated Utica Dry Gathering System: Utica Dry Existing Development Area > Dry System > Ownership: 100% WPZ > Development Underway C - 12 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Northeast G&P Utica Supply Hub Vertically Integrated in Rapidly Expanding Basin LEADING ASSETS POSITIONED TO SERVE PRODUCERS IN THE WET & DRY UTICA Kensington Plant > Integrated from wellhead to fractionation Utica East Ohio System: > Processing Capacity: – Kensington Cryogenic Plant: 600 MMcf/d – Leesville Cryogenic Plant: 200 MMcf/d Leesville Plant Harrison Hub > Fractionation Capacity: – Harrison Fractionator: 135 MBpd > Ownership: 49% WPZ owned – 13% – 21% Acquisition Pending C - 13 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Northeast G&P Ohio River Supply Hub: Well Positioned to Serve Wet, Dry Gas in Growing Marcellus and Utica Basins A Powerful Combination of Assets to Serve Southern Marcellus, Eastern Utica C - 14 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Northeast G&P Laurel Mountain Midstream Covers Broad Footprint in Western PA CONTINUED SYSTEM EXPANSION THROUGH JV WITH CHEVRON > JV with Chevron – 69% WPZ owned starting Oct 1st, 2014 – WPZ operated > Optimization of capital plan for dry gas area – System capacity of ~700 MMcf/d by 2015 year end EXTENSIVE DEDICATIONS PROVIDE EXPOSURE TO DRY GAS AREAS > Approximately 275,000 acres dedicated C - 15 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Northeast G&P Marcellus South Expanding in Liquids-Rich Growth Basin LARGE ACREAGE DEDICATION ON THE WET GAS MARCELLUS BASIN > 65% WPZ owned and operated > 900,000 acres dedicated > Gathering and Compression HIGH LEVEL OF RIG ACTIVITY AROUND OUR ASSETS FROM CURRENT AND POTENTIAL CUSTOMERS > 600 MMcf/d Gathering capacity (680 MMcf/d by 2015 year end) > Southwestern Energy entry C - 16 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Northeast G&P Ohio Valley Midstream Large-scale Presence in Liquids-rich Marcellus EXTENSIVE ACREAGE, GATHERING AND PROCESSING UNDER CONTRACT > Long-term contracts: – 236,000 acres dedicated – 7 producers – Processing of gathered gas WELL POSITIONED ASSETS WITH SIGNIFICANT EXPANSION OPPORTUNITIES Moundsville Oak Grove Ft. Beeler > Processing Capacity – Fort Beeler Cryogenic Plant currently 520 MMcf/d – Oak Grove Cryogenic Plant currently 200 MMcf/d > Fractionation/Deethanization Capacity – Moundsville fractionation 42.5 MBPD – Oak Grove Deethanizer 40 MBPD of ethane – Condensate Stabilizer 14.5 MBPD Proposed Liberty Pipeline > Ethane outlet to Sunoco C - 17 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Northeast G&P Caiman Energy II/Blue Racer Midstream JV Interest Enhances Presence in Utica Shale FOCUSES ON COUNTIES IN EAST OH AND NORTHWEST PA COVERING THE UTICA SHALE > Blue Racer Midstream is developing a substantial gathering and processing system – Nearly 600 miles of large-diameter gathering pipelines – Nearly 130 miles of NGL and condensate transportation pipelines – Natrium complex in Marshall County, WV, processing and fractionation assets – Berne processing complex in Monroe County, OH > Williams Partners owns a 58% equity investment in Caiman Energy II. Caiman Energy II owns 50% of Blue Racer Midstream Berne Natrium > Williams Partners invested approximately $420 million through 2014 for its proportional interest in Blue Racer Midstream C - 18 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Northeast G&P Utica/Ohio River Supply Hubs: Connecting Best Supplies to Best Markets C - 19 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Northeast G&P Expanding Ethane Market Connectivity Canada Markets Petchem Market Mariner W Harrison Frac Houston, PA Mari ner E Local Petchem Export East Coast UEO OVM BRM ATEX Natrium Frac Oak Grove De-Ethanizer Local Power Plants Local Petchem Gulf Coast Petchem Existing Under Evaluation C - 20 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Northeast G&P Utica and Ohio River Ethane Market Hub PROJECTS UNDERWAY, BUT OPPORTUNITIES REMAIN Canada > Total Market Access Goal Mariner West > Existing Connectivity: 230,000 bpd Exports/ East Coast Utopia* > Potential Connectivity: 460,000 bpd Mariner East Utica & Ohio River > Supporting New Demand ATEX Development Gulf Coast Local Petchem Gathering Pipeline* Local Power Plants* Local Petchem* * Under Evaluation C - 21 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Northeast G&P Expanding Propane, Butane, Natural Gasoline Market Connectivity Canada Markets Local Heating Markets Harrison Frac Chicago Utopia W C5+ to Diluent Mkt Mariner C3/C4 C3/C BRM Natrium Frac Conway Gulf Coast Existing Under Evaluation C - 22 Analyst Day 2015 | May 13, 2015 4 OVM Moundsville Frac UMTP Y-grade / C3/C4 ne Cor C5+ Refineries OH, MI, IL UEO ne rsto Export East Coast Truck Barge Rail © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Northeast G&P Utica and Ohio River Propane, Butane and Natural Gasoline Market Hub CONTINUED OPPORTUNITIES TO BUILD FOR ADDITIONAL INFRASTRUCTURE Canada Local Heating Markets > Total Market Access Goal Utopia* Cornerstone* 110,000 bpd East Coast/ Exports Utopia West* Refineries > Existing Pipe Connectivity: TEPPCO Chicago Utica & Ohio River > Planned Pipe Connectivity: Mariner East 565,000 bpd > Several Projects Entering UMTP* Gulf Coast “Open Season” Truck Rail Barge* > Truck, Rail, and Barge Balancing Capacity Conway * Under Evaluation C - 23 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Northeast G&P Utica, Ohio River Expanding Market Hub for Gas Canada NE Mkts Ontario Canada Michigan Local Distribution Tennessee Chicago Midwest Hub Utica & Ohio River Spectra Nexus + TETCO TETCO Transco Northeast Dominion North Carolina Appalachian Connector MidContinent Transco Northeast TCO Pool Gulf Coast Transco Southeast Existing Pipeline / Connections + Expansion Proposed or In Progress Proposed Pipeline C - 24 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Northeast G&P Additional Growth Opportunities for Dedicated Acreage in NW PA and NE Ohio EXTENSIVE DEDICATION PROVIDES OPPORTUNITIES TO EXPAND > Rex and Shell G&P Agreement – 244,500 dedicated acres – Fee-based > Chevron G&P Agreement – 285,000 dedicated acres – Fee-based Rex, Shell and Chevron Acreage Dedications C - 25 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Northeast G&P Growth Outlook C - 26 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Northeast G&P Strong Fundamentals and Competitive Advantages Drive Robust, Visible Growth Northeast G&P Growth Investment Opportunities 2015–2020 WPZ / WMB Pursuing Over $30 Billion of Project Opportunities !! In guidance1 Growth Opportunities Include: !! Under negotiation > Continue Expansion in NE PA !! Potential West (WPZ) NGL & Petchem (WMB) NGL & Petchem (WPZ) to Meet Producers’ Growth Northeast G&P (WPZ) > Opportunities for Continued Growth in Ohio River and Utica Supply Hubs Access Northeast (WPZ) > Expanding Market Hubs Access Midstream (WPZ) > Gathering and Processing Atlantic-Gulf (WPZ) Opportunities in NW PA and NE OH C - 27 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Northeast G&P Delivering Large Scale Infrastructure for Fastest-Growing Supply Area in the U.S. GATHERING VOLUME GROWTH THROUGH 1Q2015 AVERAGE GATHERED VOLUMES (BCF/D) 7.00 2012–2014 CAGR: 6.00 > Legacy WPZ +45% 5.00 > Legacy Access +52% > Combined +49% 4.00 3.00 2.00 1.00 1Q'12 2Q'12 3Q'12 4Q'12 1Q'13 2Q'13 Dry Gas 3Q'13 4Q'13 1Q'14 2Q'14 3Q'14 4Q'14 Wet Gas Partially owned system volumes are shown at 100%. Note: Excludes volumes for Blue Racer investment. C - 28 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. 1Q'15 WPZ – Northeast G&P Leading Gathering Position in Preeminent Gas Basin in North America TOTAL MARCELLUS/UTICA AVERAGE GATHERED VOLUMES (Bcf/d) - 1Q 20151 Marcellus 38% Non WPZ Marcellus & Utica Gathered Volumes2 Utica Northeast Gathering Systems and WPZ Ownership Susquehanna Supply Hub (100%) Bradford Supply Hub (39%) 1 Source for total Utica and Marcellus volume: Energy Information Administration, average daily production for 1Q 2015. 2 Ohio River Supply Hub # Ohio Valley Midstream (100%) # Laurel Mountain Midstream (69%) # Marcellus South (65%) Utica Supply Hub # Utica Dry Gas (100%) # Cardinal (66%) Blue Racer Midstream (29%) Partially owned gathering system volumes are shown at 100%. C - 29 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Northeast G&P Northeast G&P Summary > Large-scale infrastructure in place > Positioned to capture value > Focused on delivering optimal value > Large-scale position connects best basins to best markets C - 30 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. NGL & Petchem Services John Dearborn Senior Vice President NGL & Petchem Services Overview D - 2 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. NGL & Petchem Services Connecting Low Cost NGL Supplies to Growing Global Markets for Fuels and Petrochemicals Strong Linkage to Williams Strategy EXECUTION With a Process Safety Mindset, operate our existing assets reliably, minimizing cost and maximizing their value FEE-BASED GROWTH Grow free cash flow employing a fee for service business model to the valuable solutions and services provided to the market D - 3 Analyst Day 2015 | May 13, 2015 SUSTAINABLE COMPETITIVE ADVANTAGE Take commodity exposure only when sustainably advantaged and compensated for the risk © 2015 The Williams Companies, Inc. All rights reserved. NGL & Petchem Services Uniquely Positioned to Benefit from a Broad Spectrum of Opportunities Serving Demand Growth Enabled by Abundant Natural Gas Competitively Advantaged Margins Fee for Service Pipelines Storage Fractionation Geismar Canadian Offgas Processing Canadian PDH (Proposed) Geismar II (Proposed) D - 4 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. NGL & Petchem Services NGL & Petchem Execution Highlights Progressing Against Plan > Geismar operating at base capacity – Full expanded capacity expected in June > Advancing our unique position in Alberta – Maximizing value from current assets – Horizon Offgas project in Alberta scheduled for start-up in Q4 – PDH-1 advancing to sanction – In discussions with Syncrude for a third offgas extraction plant in Alberta > Pipeline projects progressing – Texas Belle in-service and pursuing additional business opportunities – Bayou Ethane in-service providing physical connectivity to Mt. Belvieu – Promesa Pipeline commercial negotiations nearing completion, pipeline in construction > Acquired the Hutchinson rail terminal from NGL Energy Partners > Advancing Geismar II with discipline D - 5 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. NGL & Petchem Services Market Dynamics D - 6 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. NGL & Petchem Services Naphtha – Dominant Global Ethylene Feedstock North America Enjoys Sustainable Natural Gas-based Advantage ETHYLENE PRODUCTION BY FEEDSTOCK (BILLIONS OF POUNDS) > Naphtha expected to set global market price for ethylene 500 > North American 400 feedslate predominantly ethane based 300 200 > Low likelihood of oversupply in the global ethylene market 100 0 World N.A. World N.A. World N.A. World N.A. World N.A. 2016 2018 2020 2022 2024 Ethane Propane Butane Naphtha Gas Oil Others Source: IHS, World Ethylene Analysis 2015 D - 7 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. NGL & Petchem Services Ethane Sustains North American Investment Cost Advantage Remains Through a Wide Range of Commodity Prices GLOBAL ETHYLENE PRODUCTION COST SUPPLY CURVE $100/bbl 40 $58/bbl 30 0 2,500 5,000 7,500 Asia Naphtha W. Europe Naphtha W. Europe LPG Asia LPG NA Ethane China Coal Middle East Ethane 0 Rest of World 19 cpg 10 NA Naphtha 20 Middle East LPG / Naphtha 50 cpg NA LPG Ethylene Production Cost (cents/pound) 50 10,000 12,500 15,000 17,500 20,000 22,500 25,000 Monthly Global Ethylene Production (millions of pounds) Source: Wood Mackenzie, Williams Research Feb 2015: Brent Crude Oil = $58/bbl; US Ethane = 18.5 cpg; US Natural Gas = $2.65/MMbtu What-if Scenario: Brent Crude Oil = $100/bbl; US Ethane = 50.0 cpg; US Natural Gas = $4.50/MMbtu D - 8 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. NGL & Petchem Services Ethane Supplies Are Plentiful in North America Ethane Remains Competitive Feedstock After Paying for Infrastructure ETHANE SUPPLY POTENTIAL SUPPORTS ~500 MBPD OF ADDITIONAL U.S. CRACKER DEMAND (MBPD) Additional cost required to deliver to market 3,000 Demand Sources 2,500 Exports to Canada n Rejectio 2,000 Other Demand 1,500 Waterborne Exports Chemical Demand for Ethane 1,000 500 0 2014 2016 2018 2020 2022 2024 Total Supply Source: Wood Mackenize, Williams Research D - 9 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. NGL & Petchem Services Franchise Snapshots D - 10 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. NGL & Petchem Services Driving Growth in Guidance and Beyond NGL & Petchem Services Contributes to Williams Growth Potential 2015–2020 WPZ / WMB PURSUING OVER $30 BILLION OF PROJECT OPPORTUNITIES !! In guidance1 !! Under negotiation !! Potential NGL & Petchem (WPZ) NGL & Petchem (WMB) Northeast G&P (WPZ) West (WPZ) Access Northeast (WPZ) Access Midstream (WPZ) Atlantic-Gulf (WPZ) 1 GROWTH OPPORTUNITIES INCLUDE: > In Guidance: – Geismar Expansion & Modernization – Bayou Ethane – Texas Belle – Promesa – Hutch Rail > Additional Growth Opportunities: – Geismar II – Syncrude Offgas Processing – PDH I – PDH II – Jackrabbit Propylene System Guidance presented here is at the midpoint of ranges. D - 11 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. Geismar Plot Plan Rebuilt and Expanded D - 12 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. Geismar Plant Currently Operating at Base Rate Expansion Awaiting Repair to EBR System Transformer Gas Treating Propane To Fuel To Fuel To Hydrogen Purification Ethylene and Ethane New Caustic Tower Hydrogen Dryers 2 New Charge Gas Compressor Bed Height Extended Feed Separators Demethanizer New Trays New Quench Tower New Demethanizer Cracking Furnaces Precut Demethanizer Ethane Parallel Amine Towers New C2 Dryer Methane To Hydrogen Customer Battery Limits New EBR System New Booster Compressor Ethylene Propane Conversion Ddebutanizer Certain new equipment added Propylene Fractionator Depropanizer Ethylene Fractionator New Trays 2 New Acetylene Converters replacing existing 3 Propylene Recycle to DeEthanizer Legend Systems currently operating System not yet operating Butadiene DAC D - 13 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. NGL & Petchem Services Geismar Expansion and Modernization Restore Confidence in Geismar’s Reliability > Expectations and focus: – Production expected to average base rate in April to May period with nearly 100 million pounds of ethylene produced in April – Full expanded production expected in June – Focus on optimizing reliability and profitability with new equipment configuration – Deliver promised value to our shareholders > Expansion increases annual ethylene production capacity 50% to 1.95 billion lbs – Williams’ share is 1.7 billion lbs D - 14 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. NGL & Petchem Services Pipeline Projects Meeting Market Demands Texas Belle and Bayou Ethane Now Operational WMB TEXAS BELLE PIPELINE > Commissioned and in-service > Transportation solution for new C4+ NGL demand – On-purpose butylene production from plentiful iso-butane supply – Motor fuel blending and export WPZ BAYOU ETHANE PIPELINE > Phase 1 in service in Dec. 2014 > Phase 2 in service this month > Phase 3 later this year > Supplies Geismar plant along with customers in Mississippi River Corridor, Golden Triangle and Lake Charles areas D - 15 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. NGL & Petchem Services Promesa Open Access Ethylene Pipeline Pipeline in Construction > Linking new growing supplies with Net Ethylene Capacity Golden Triangle Area new growing demand of ethylene > Connecting the Ship Channel, Mont Belvieu, Golden Triangle and the Mississippi River markets > Strengthens the Williams ethylene hub > System of repurposed, leased and some new-build pipelines Net Ethylene Capacity Mont Belvieu/Ship Channel 2014 2019 2024 0- MM lbs/yr 2,000 1,600 1,200 800 MM lbs/yr 400 (2,000) 0 2014 2019 2024 (4,000) (6,000) – Integrity work progressing on repurposed pipeline Net Ethylene Capacity Lake Charles Area Net Ethylene Capacity Mississippi River Area 2,000 2014 2019 2024 0- 1,200 MM lbs/yr MM lbs/yr 1,600 800 400 0 2014 2019 2024 (2,000) (4,000) (6,000) Note: Ethylene supply and consumption data per IHS D - 16 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. NGL & Petchem Services Advancing Unique Positions in Alberta Expanding Liquids Extraction and Fractionation > Suncor-sourced liquids production of 6.9 million barrels included full-year of ethane extraction – Fee for service floor pricing provides protection in a low price ethane environment Alberta > Horizon project nearing completion – Scheduled for start-up in fourth quarter of 2015 – Scope includes • Liquids extraction plant (WMB) • Boreal pipeline lateral (WMB) • Redwater expansion (WPZ) – Contributes meaningfully to 2016+ > In discussions with Syncrude for third offgas processing opportunity D - 17 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. NGL & Petchem Services Fee-based Alberta Propylene Production (PDH-1) Land-locked Propane Converted to Globally Competitive Polypropylene > Propylene capacity of 525 KTA – 450 KTA fee for service firm offtake – 75 KTA marketed as propylene > With propylene derivative partner this system makes some of the most competitive polypropylene in North America > Significant FEED completed to reduce capital risk > Target full sanction in early 2016 D - 18 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. NGL & Petchem Services Maximizing the Mid-continent Bakke n (3 rd Pa NGL Pipelin e rty Pip eline) Demand Increasing for NGL Services > Cochin Reversal, Powder River Growth and Bakken Growth contributing to increasing demand in Mid-continent for NGL services – Customers pursuing seasonal fuels blending opportunities > Overland Pass Pipeline – Significant growth expected in 2015 volumes primarily driven by Bakken and Powder River volume > Conway rail and storage – Strong storage season exceeded expectations – New Hutch rail capacity allows flexibility for Williams to capture rail unloading and associated storage > Conway frac – Williams share fully utilized due to Overland Pass Pipeline connection D - 19 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. NGL & Petchem Services Expanded Rail Capacity – Fee for Service Growth Williams Now Largest Rail Service Provider in Mid-continent > Increased rail car capacity by 70% > Provides an additional 22 aboveground storage tanks > Served by BNSF railroad > Fully integrated with existing Conway rail and storage facilities – 25 miles from Conway assets D - 20 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. NGL & Petchem Services Connecting Supplies with Global Markets Fee for Service New Build Ethylene Cracker at Geismar COMPETITIVE ADVANTAGES > Builds into Mississippi River ethylene short position of 4.5–5 billion pounds > Creates new Gulf Coast ethylene and ethane demand > Provides supply reliability to market D - 21 Analyst Day 2015 | May 13, 2015 STATUS OF PROJECT > Nearing selection of JV partner > Advancing negotiations on ethane to supply Mississippi River > Honing execution strategy to minimize capital risk > Target 2016 sanction © 2015 The Williams Companies, Inc. All rights reserved. NGL & Petchem Services NGL & Petchem Strategic Imperatives > Enhance operational discipline and safety performance > Bring expanded Geismar plant into sustainably safe operations > Maximize value of Horizon Offgas start-up > Deliver Gulf Coast pipeline and storage solutions > Deliver PDH program value D - 22 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. West Walter Bennett Senior Vice President WPZ – West Low Risk, High Return, Strong Outlook RELIABLE OPERATIONS ACROSS VAST FOOTPRINT Large-scale operations in positions in proven hydrocarbon reserves E - 2 Analyst Day 2015 | May 13, 2015 SIGNIFICANT VOLUMES DRIVING HIGH-QUALITY REVENUE Steady, primarily fee-based business underpinned by strong customer base WELL-POSITIONED TO FEED GROWING DEMAND PULL Linking abundant, diverse supplies to established and emerging markets © 2015 The Williams Companies, Inc. All rights reserved. WPZ – West Reliable Operations Spanning from New Mexico to Pacific Northwest Key Operating Data – West Miles of Gathering Pipe: 7,927 Miles of Transmission Pipe: 3,900 Gathering Capacity: 4.4 Bcf/d Processing Capacity: 5.2 Bcf/d Total Horsepower: E - 3 Analyst Day 2015 | May 13, 2015 1.32 million © 2015 The Williams Companies, Inc. All rights reserved. WPZ – West Video Profile: Bucking Horse Plant E - 4 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – West Durable, Fee-based Revenue 87% of Gross Margin and Expected to Continue Growing $1.2 BILLION GROSS MARGIN - 2015 NGL Margins 11% Commodity-based Fee 2% 48% G&P Fee NWP Fee 39% E - 5 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – West West G&P: Scale, Stability, Potential Growth > Prolific reserves throughout region Northwest Pipeline > Large-scale positions Wyoming > 3,776 miles of pipeline > 1.2 Bcf/d of gathering capacity provide competitive advantages > 2.3 Bcf/d of processing capacity Piceance Basin > 328 miles of pipeline > Strong cash flows and efficiencies > 1.4 Bcf/d of gathering capacity > 1.8 Bcf/d of processing capacity > Ability to “throttle up” to meet customer needs Four Corners > 3,739 miles of pipeline > 1.8 Bcf/d of gathering capacity > 1.5 Bcf/d of processing/ treating capacity E - 6 Analyst Day 2015 | May 13, 2015 > Expanding midstream services to upstream customers © 2015 The Williams Companies, Inc. All rights reserved. WPZ – West West G&P Delivers Significant Volumes, Revenue GATHERING VOLUME BY QUARTER (BCF/D)1 3.0 2.5 2.0 1.5 1.0 0.5 0.0 Q1'13 1 Reflects Q2'13 Q3'13 Q4'13 Q1'14 Q2'14 Q3'14 Q4'14 Q1'15 volumes gathered on Williams-operated systems. E - 7 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – West Rockies Producer Margins Still Strong Thanks to Low-cost Available Infrastructure Source: Williams Research $4.00 T&F Fees NGL $3.00 $2.00 Margin Gas Processing Gas Gathering Gas NGL Uplift $1.00 Opal Gas $0.00 ROCKIES PRODUCER'S GAS + NGL VALUE & FEES – 2015 ($/Mcf) E - 8 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – West Northwest Pipeline: Delivering Value for Customers in Pacific Northwest Spokane Seattle > Optionality for customers between Canada and Rockies prices – Plentiful, diverse supply sources in British Columbia, Alberta, Rockies, San Juan Portland Northwest Pipeline Boise 3.9 MMdth/d long-term capacity - 3,900 miles of pipeline - 41 compressor stations 14 MMdth storage capacity - 2 storage facilities - 731 Mdth/d withdrawal capacity 1 In > Strong competitive position – Sole provider in most major markets – Established infrastructure difficult and expensive to replicate – 99.9% reliability on firm transportation > High-quality revenue for Williams – High credit-quality customers – Average remaining contract life > 9 years > Strong customer relationships – Ranked #2 in Mastio survey of pipeline customers1 – Most customers rated Northwest Pipeline “better” or “much better” than other pipelines the mega/major pipeline category. E - 9 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – West Outlook E - 10 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – West Strong Fundamentals and Competitive Advantages Drive Growth Opportunities West Growth Investment Opportunities 2015–2020 WPZ / WMB Pursuing Over $30 Billion of Project Opportunities !! In guidance1 !! Under negotiation Growth Opportunities Include: !! Potential > Methanol Plant Expansions West (WPZ) Northeast G&P (WPZ) NGL & Petchem (WMB) NGL & Petchem (WPZ) > Pacific Connector > Industrial & Power Plant Access Northeast (WPZ) Access Midstream (WPZ) Expansions > Gathering and Processing Opportunities Atlantic-Gulf (WPZ) 1 Guidance presented here is at the midpoint of ranges. E - 11 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – West Pacific Northwest Demand Growth Heating Up Port of Tacoma Methanol Export Up to 320 MDth/d Target ISD: 2019 > Announced New Market Seattle Kalama Methanol Export Up to 320 MDth/d Target ISD: 2018 Washington Expansion Up to 750 MDth/d Target ISD: 2020 TransAlta Coal Plant Up to 200 MDth/d Target ISD: 2020/2025 Oregon LNG Opportunities – – – – LNG Export Methanol Export Fertilizer Plants Coal Conversion Portland > Potential Projects – Washington Expansion – Pacific Connector Port Westward Methanol Export Up to 320 MDth/d Target ISD: 2020 Jordan Cove Pacific Connector Gas Pipeline 1 Bcf/d Target ISD: 2020 Magnida Fertilizer Up to 75 MDth/d Target ISD: 2018 Boise E - 12 Analyst Day 2015 | May 13, 2015 Blue = Proposed Expansion Projects (not included in guidance) Green = Potential new end-use markets announced by 3rd parties (may lead to additional expansion opportunities on Northwest) © 2015 The Williams Companies, Inc. All rights reserved. WPZ – West Pacific Connector to Serve Global Markets > To serve proposed Jordan Cove LNG export terminal > 232-mile, 36-inch pipeline; initial capacity = 1 Bcf/d > 50/50 Ownership: Williams & Veresen > Access to Rockies and Canadian supplies from existing pipelines > Terminal has advantaged port and shipping costs to Asian markets E - 13 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – West West Wrap-up > Reliable operations, vast footprint > Significant, high-quality revenue > Demand growth building E - 14 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. Atlantic - Gulf Rory Miller Senior Vice President WPZ – Atlantic - Gulf Overview F - 2 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Atlantic - Gulf High-growth, Low-risk, Fee-based Businesses RAPID PACE OF EXPANSION Growing demand continues to drive tremendous opportunity F - 3 Analyst Day 2015 | May 13, 2015 TRACK RECORD OF EXECUTION 2015 to date: Rockaway, Northeast Connector, Mobile Bay South III, CPV Woodbridge UNIQUE CAPABILITIES IN GULF Business model appeals to producers in capital constrained environment © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Atlantic - Gulf Abundant Supply + Strong Demand = Rapid Growth CONNECTING THE BEST SUPPLIES Marcellus-Utica, Gulf Coast TO THE BEST MARKETS New York City, Washington D.C., Philadelphia, Florida, Atlanta, LNG export F - 4 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Atlantic - Gulf Franchise Snapshots F - 5 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Atlantic - Gulf Eastern Interstates: Nation’s Largest, Fastest-growing Interstate Pipeline Systems NE Connector/ Rockaway Lateral CAPITAL INVESTED PLACED INTO SERVICE ($B) Constitution $5.1 Leidy Southeast New York Bay Expansion Garden State Expansion Atlantic Sunrise $3.3 2017 Virginia Southside I & II $0.4 2016 Hillabee Phase 1 $1.4 2015 South Louisiana Market Rock Springs Expansion Dalton Lateral Gulf Trace F - 6 Analyst Day 2015 | May 13, 2015 CPV Woodbridge Mobile Bay South III © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Atlantic - Gulf Gulf West: Strong Competitive Position for Mexico, Deepwater Business > Well positioned for Alaminos Canyon, Pemex, and export to Mexico > Eagle Ford rich gas gathering and processing opportunities > Continued development at Perdido has resulted in record production rates of 175MMcfd and 90Mbpd > Opportunity to build 1.5 Bcfd gas pipeline to supply several CFE pipelines in Mexico F - 7 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Atlantic - Gulf Gulf East: Tiebacks Drive New Opportunities CONTRACTED: > Tubular Bells – Gulfstar One (GS1) – ramping up production from 3 wells and bringing on fourth well now > Kodiak – tieback to Devils Tower – expected online 4Q 2015 > Gunflint – tieback to GS1 expected first half 2016 POTENTIAL: > Appomattox development (Norphlet Play) – gas gathering, transportation, & processing – projected in service 2019 > Taggart – tieback to Devils Tower – projected in service early 2017 F - 8 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Atlantic - Gulf Discovery: Keathley Canyon Connector™ Ramps Up > 400 MMcf/d capacity > Lucius First Gas: Feb. 7, 2015 > Hadrian South First Gas: March 28, 2015 > Combined Lucius/Hadrian South ramp-up ongoing > Heidelberg First Gas: Mid-2016 > Buckskin/Moccasin: Likely tied back to Lucius > High-potential neighborhoods with development drilling planned in 2015 > Total Discovery system currently at max capacity of 650MMcf/d F - 9 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Atlantic - Gulf Video Profile: Keathley Canyon Connector F - 10 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Atlantic - Gulf Growth Outlook F - 11 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Atlantic - Gulf Eastern Interstates: Unprecedented Growth with Fully Contracted Projects CAPITAL INVESTMENT PLACED INTO SERVICE ($MM) MMdt/Day 17.7 $4,000 13.4 Peak Day Transco Record Jan. 7 $3,500 $3,000 $2,500 16 14 10.8 $2,000 18 12 $1,500 10 $1,000 7.7 8 $500 $0 6 2003 2005 Transco 2007 Gulfstream* 2009 Constitution* 2011 2013 2015 2017 Capacity* * Represents Williams ownership percentage. The estimated project in-service dates assume timely receipt of all regulatory approvals. Constitution expected in service second half of 2016. F - 12 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Atlantic - Gulf Eastern Interstates: Growth Volumes Well Balanced Among High-quality Customers LDC LNG 12% > Distribution of total 25% Producer volume growth (6.9 Bcf/d) in guidance 29% > Contract life ranges from 15 to 30 years 34% Power Plant F - 13 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Atlantic - Gulf WPZ – Atlantic - Gulf Customer Demand Drives New York Bay Project > Expansion from Station 195 in York County, Pa., to two existing delivery points in New York > Follow-on to Rockaway Narrows Rockaway Delivery Point 210 205 200 195 River Road F - 14 Analyst Day 2015 | May 13, 2015 207 > Open season concluded March 26 > 115 MDth/d fully committed > Customer: National Grid > Target in-service: Late 2017 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Atlantic - Gulf Atlantic Sunrise: Unlocking Marcellus Access > Bolsters connection to growing Marcellus supplies 195 > 1.7 MMDth/d fully committed > 15-year binding Atlantic Sunrise • 1.7 MMDth/d • 2017 firm-transportation agreements > Expecting WPZ net 165 investment of $1.9 billion > Producers, LDCs investing in greenfield portion of project > Target in-service: second half of 2017 85 F - 15 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Atlantic - Gulf Proposed Appalachian Connector Leverages Northeast G&P’s Ohio Valley Midstream Position > Incremental firm 195 Proposed Appalachian Connector Project 165 transportation capacity from receipt points in western Marcellus, Utica to mid-Atlantic, Southeast and Gulf Coast markets as far south as Station 65 in Louisiana > In discussions with potential shippers > Facilities and scope to be Market Pull: LNG, Mexico 85 Market Pull: Power Gen determined based on final level of shipper commitment 65 F - 16 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Atlantic - Gulf Northern Market: Continuing Strong Growth Constitution • 650 MDth/d • 2016 Leidy Southeast • 525 MDth/d • 2015 Leidy Hub CPV Woodbridge • 264 MDth/d • April 1, 2015 New York City Atlantic Sunrise • 1,700 MDth/d • 2017 210 Rockaway Lateral • 647 MDth/d • 2015 Garden State • 180 MDth/d • 2017 195 VA F - 17 Analyst Day 2015 | May 13, 2015 NE Connector • 100 MDth/d • 2014/2015 Rock Springs Lateral • 192 MDth/d • 2016 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Atlantic - Gulf Power Gen Fuels Southern Market Expansions Virginia Southside • 270 MDth/d • 2015 Virginia Southside II • 250 MDth/d • 2017 165 160 Dalton Expansion • 448 MDth/d • 2017 Hillabee Expansion • 818 MDth/d • 2018 85 Mobile Bay South III • 225 MDth/d • April 1, 2015 F - 18 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Atlantic - Gulf Video Profile: Virginia Southside F - 19 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Atlantic - Gulf Gulf Market Area Expansions Serving LNG and Industrial Customers 65 Gulf Connector • 1,200 MDth/d • 2019 50 45 30 Gulf Trace • 1,200 MDth/d • 2017 F - 20 Analyst Day 2015 | May 13, 2015 South Louisiana Market • 190 MDth/d • 2018 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Atlantic - Gulf Summary F - 21 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Atlantic - Gulf Unprecedented Growth Expected Through 2020 Atlantic - Gulf Growth Investment Opportunities 2015–2020 WPZ / WMB PURSUING OVER $30 BILLION OF PROJECT OPPORTUNITIES !! In guidance1 !! Under negotiation > Numerous demand-driven Transco projects !! Potential NGL & Petchem (WPZ) NGL & Petchem (WMB) GROWTH OPPORTUNITIES INCLUDE: Northeast G&P (WPZ) West (WPZ) Access Northeast (WPZ) Access Midstream (WPZ) > Infrastructure to connect Marcellus/ Utica supply to Transco’s Southeast markets > Gulf market area expansions serving LNG and industrial customers > Additional Gulfstars > Various offshore tiebacks Atlantic-Gulf (WPZ) > Mexican offshore production facilities > Texas-to-Mexico export pipeline 1 Guidance presented here is at the midpoint of ranges. F - 22 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ – Atlantic - Gulf Atlantic - Gulf Wrap-up > Connecting the best supplies to the best markets > Stable, repeatable cash flows > Proven track record of execution > And the hits keep on coming! F - 23 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ and WMB: Financial Outlook Don Chappel Chief Financial Officer Financial Outlook – WPZ Williams Partners L.P. (WPZ) Financial Outlook G - 2 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. Financial Outlook – WPZ WPZ Is a Premier Energy-Infrastructure Investment > ACMP/WPZ merger created leading natural gas MLP with strong cash distribution growth and investment-grade credit ratings 1 > DCF expected to grow ~18% (CAGR) from 2015 to 2017 > Approximately 88% of WPZ gross margin coming from fee-based revenues > Investment grade credit rating with ~$3 billion of available liquidity > $9.3 billion of total growth capex in 2015-2017 guidance; 99% is focused on fee-based projects > WPZ and WMB have over $30 billion of committed and potential growth capital through 2020 1 > Improving cash coverage ratio over period, targeting 1.07x by 2016 > Expect WPZ per unit distributions of $3.40 in 2015 with 7% to 11% annual growth rate through 2017 with growing coverage Notes: All Distributable Cash Flow (DCF) references are “Attributable to Partnership Operations”. 1 Distributable Cash Flow (DCF) and Cash Distribution Coverage Ratio are non-GAAP measures. A reconciliation to the most relevant GAAP measure is included in this presentation. G - 3 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. Financial Outlook – WPZ Expect Strong Growth Through 2017 and Beyond (Low / High guidance, dollars in millions) ADJUSTED EBITDA 1 $6,500 $6,000 DISTRIBUTABLE CASH FLOW (DCF) 1 2-Yr CAGR 16% $6,180 $5,000 $4,500 2-Yr CAGR 18% $5,510 $5,500 $5,000 $5,750 $4,630 $3,475 $3,000 $2,845 $4,300 2015 $2,500 2016 2015 2017 2015 1.15x $5,000 1.10x 1.06x $4,230 $3,630 2017 DISTRIBUTION COVERAGE RATIO1 CAPEX & INVESTMENTS2 $4,000 $3,960 $3,175 $5,120 $4,500 $4,000 $3,875 $4,000 $3,500 $4,410 $3,580 1.05x 1.03x $3,680 1.08x 1.05x 0.95x $3,000 $3,080 $2,980 2016 2017 0.95x 0.85x $2,000 2015 2015 2016 2017 Notes: Expect 2015 Adjusted EBITDA , DCF and Cash Distribution Coverage Ratio to be near low end of guidance range. All Distributable Cash Flow (DCF) references are “Attributable to Partnership Operations”. 1 Adjusted EBITDA, Distributable Cash Flow and Cash Distribution Coverage Ratio are non-GAAP measures. A reconciliation to the most relevant GAAP measure is included in this presentation. 2 Includes purchases of property, plant & equipment; investments; and businesses. G - 4 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. Financial Outlook – WPZ WPZ expecting ~ 88% fee-based gross margins for 2015-2017 0 2015 FORECAST: $6.9 BILLION (includes proportional JV margins) 4% 7% 29% Regulated Gas Pipeline Fee Based Revenue (29%) (Demand Payments) Access Midstream Fee Based Revenue (29%) (Primarily Cost of Service and MVC) 31% Other Fee Based Revenue (31%) Olefins Commodity Margins (7%) NGL Commodity Margins (4%) 29% Note: Gross margin dollars and fee-based percentage calculated at midpoint of guidance range. G - 5 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. Financial Outlook – WPZ WPZ allocating 99% of $9.3 billion in growth capital guidance to fee-based projects 2015-2017 GROWTH CAPITAL FORECAST 1% Regulated Gas Pipeline Fee Based Projects (52%) 26% (Demand Payments) Access Fee Based Projects (21%) (Primarily Cost of Service and MVC) 52% Other Fee Based Projects (26%) Commodity Margin Projects (1%) 21% Note: Growth capital dollars and fee-based percentage calculated at midpoint of guidance range. G - 6 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. Financial Outlook – WPZ WPZ Has Significant Liquidity and Investment Grade Rating > > > > > > ~$3.0 billion total available liquidity (as of 5/1/15) No outstanding revolver loans (as of 5/1/15) $521 million of commercial paper outstanding (as of 5/1/15) No significant debt maturities until 2020 Debt is all fixed rate Investment grade credit metrics and rating WPZ CONSOLIDATED DEBT (DOLLARS IN MILLIONS) $5,000 $4,000 $4,500 $4,468 $2,000 $2,100 $1,000 $375 $0 2015 * 2016 $785 2017 $1,250 $1,500 2021 2022 $2,000 $1,750 2023 2024 $500 2018 2019 2020 2025-2045 2025 * $750 million of debt maturing in 1Q 2015 was previously refinanced. G - 7 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. Financial Outlook – WPZ Expect Continued Strong Cash Distribution Growth (Midpoint of guidance, distributions per L.P. unit) 2015–2017 9% CAGR > History of strong distribution growth > Current guidance reflects annual distribution growth of 7% to 11% through 2017 with growing coverage $4.50 $4.04 $4.00 > Cash distributions growing less than underlying DCF growth as we rebuild coverage to target > Cash flows are anchored by rapidly growing fee-based business, which is projected to be ~88% of WPZ’s 2015-2017 gross margin $3.71 $3.50 $3.40 $3.00 $2.50 2015 2016 2017 Guidance Notes: Presented on an accrual basis. G - 8 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. Financial Outlook – WPZ WPZ Adjusted EBITDA1 Expected to Grow by $1.2 Billion or 38% This Year Driven by Increases in Fee Revenues $5,500 Dollars in millions +$400 ($321) $5,000 ($175) +$125 Increase in Gas Pipelines Fee Revenues ($80) Decrease in NGL Margins $4,465 Increase in Operating Expenses & Other +$700 $4,000 Increase in Other Fee Revenues (Unregulated excluding ACMP) Inclusion of Full Year + $570 $3,500 llion mi ,224 % or 38 +$1 Growth +$130 $3,241 $3,000 Increase in Olefins Volumes +$575 $4,500 Geismar Insurance Timing3 Increase in ACMP EBITDA 2014 Adjusted EBITDA 1,2 2015 Adjusted EBITDA 1 Notes: Expect 2015 Adjusted EBITDA to be near low end of guidance range. Includes proportionate share from joint venture investments. 1 A more detailed schedule reconciling this non-GAAP measure is provided in this presentation. 2 Includes ACMP from July 1 to December 31. 3 2014 Adjusted EBITDA included $321 million of actual and expected business interruption insurance proceeds. G - 9 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. Financial Outlook – WPZ WPZ Adjusted EBITDA1 Grows $1.5 Billion or 34% Over Two Years Driven by Increases in Fee Revenues $6,500 Dollars in millions +$50 +$200 $6,000 +$250 Increase in Gas Pipelines Fee Revenues +$275 +$175 $5,500 ($125) $5,315 +$125 Increase Increase in in Commodity Operating Margins Expenses & Other +$250 $5,000 $4,500 Increase in Gas Pipelines Fee Revenues +$425 Increase in ACMP Fee Revenues $4,465 Increase in ACMP Fee Revenues Increase in Other Fee Revenues (Unregulated excluding ACMP) illion ($125) $5,965 Increase in Operating Expenses & Other % or 12 0m +$65 Increase in Other Fee Revenues (Unregulated excluding ACMP) $4,000 illion % or 19 0m +$85 $3,500 $3,000 Increase in Commodity Margins 2015 Adjusted EBITDA 1 2016 Adjusted EBITDA 1 2017 Adjusted EBITDA 1 Notes: Expect 2015 Adjusted EBITDA to be near low end of guidance range. Includes proportionate share from joint venture investments. 1 A more detailed schedule reconciling this non-GAAP measure is provided in this presentation. G - 10 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. Financial Outlook – WMB Williams (WMB) Financial Outlook G - 11 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. Financial Outlook – WMB Williams well positioned for continued strong growth > ACMP/WPZ merger created leading natural gas MLP with cash distribution growth and investment-grade credit ratings > Strong, growing cash flows from WPZ distributions expected to increase ~31% from 2015 to 2017 (14% CAGR) > Fee-based revenues comprise ~87% of WMB gross margins > Over $9.7 billion of total growth capex in 2015-2017 guidance; 99% of projects focused on fee-based projects > Investment grade credit rating with ~$1.2 billion of available liquidity > Over $30 billion of committed and potential growth capital through 2020 > Expect WMB dividend of $2.38 per share in 2015 with 10% to 15% annual growth rate in 2016 and 2017 with growing coverage G - 12 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. Financial Outlook – WMB Expect Strong Growth Through 2017 and Beyond (Midpoint of guidance, dollars in millions, except per share amounts) ADJUSTED EBITDA1 $7,000 DISTRIBUTIONS FROM WPZ 2-Yr CAGR 16% $4,000 $6,050 $6,000 3-Yr CAGR 12% $3,000 $5,375 $2,000 $5,000 $4,510 $2,805 $2,455 $1,000 $4,000 $0 2015 2016 2017 DIVIDENDS PER SHARE2 $3.50 $2,140 $2,000 2014 2016 2017 DIVIDEND COVERAGE RATIO2 CAGR 2014-2018 15.5% CAGR 2015-2018 12.5% 1.30x Boosted Dividend 36% in 2014 and Moved to a Pure-Play GP Holding Company Structure $3.01 $2.68 1.20x $2.38 $2.50 2015 1.19x $1.96 1.10x $1.50 1.00x 2014 2015 2016 2017 2014 1.10x 1.06x 1.05x 2015 2016 2017 Notes: Expect 2015 Adjusted EBITDA to be near low end of guidance range. 1 A more detailed schedule reconciling this nonGAAP measure is provided in this presentation. 2 Detailed illustrative dividend and coverage calculations are included in this presentation. G - 13 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. Financial Outlook – WMB Strategic, Large-Scale, Primarily Fee-Based Cash Flows Driving Growth PROJECT DESCRIPTION AND EST. CAPEX $ IN MILLIONS > Target IRRs > Fee-based 13%-25% > Commodity-exposed 25%+ EXPECTED REMAINING TIME TO IN-SERVICE DATE1) Atlantic Sunrise (Transco share) – $1,900 Leidy SE – $600 Partial Service Keathley Canyon Connector 60% Ownership – $460 Constitution Pipeline 41% Ownership – $360 Rockaway Lateral – $350 WPZ Atlantic/Gulf Virginia South Side – $300 Partial Service Gulf Trace – $300 Hillabee Expansion (Phase 1) – $310 Dalton Lateral – $275 Virginia South Side, Ph. 2 – $210 Garden State - $150 Phase 2 Gunflint – $150 2) Geismar Expansion – $810 WPZ NGL/Petchem CNRL Upgrader – $250 WMB NGL/Petchem CNRL Upgrader – $450 Pipeline Acq. & Related Petchem Svs. Proj. – $450 Q1 Q2 Q3 2015 Q4 Q1 Q2 Q3 2016 Q4 Q1 Q2 1) Actual in-service date often dependent on customer readiness, regulatory approvals, and other factors outside our control. Estimated project capital expenditures include amounts invested prior to 2015. 2) Geismar expansion currently in ramp-up, expect full expansion production rate in June 2015 G - 14 Analyst Day 2015 | May 13, 2015 Q3 2017 © 2015 The Williams Companies, Inc. All rights reserved. Q4 Financial Outlook – WMB Strong Fundamentals and Competitive Advantages Drive Robust, Visible Growth Growth Investment Spending by Operating Area 2015–2017 2015–2020 ~$10 BILLION ~$18 BILLION !! 2015-17 in guidance1 !! In guidance $30 BILLION+ !! In guidance1 1 !! Under negotiation !! Potential !! Under negotiation Access Midstream (WPZ) West (WPZ) Northeast G&P (WPZ) NGL & Petchem (WMB) NGL & Petchem (WPZ) 1 Atlantic-Gulf (WPZ) Guidance presented here is at the midpoint of ranges. G - 15 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. Transition to Demand-driven Growth Demonstrated in Guidance and Beyond WMB/WPZ Pursuing Over $30 Billion of Growth Projects Supply Driven 2015 to 2017 > Gulfstar One > Kodiak > Northeast > CNRL Offgas* > Gunflint > Access G&P Supply & Demand Driven > Atlantic Sunrise > Constitution Pipeline Completed Projects Future Projects G&P 2018+ > Additional 2014 to 2015 ! = Completed Demand Driven > Rockaway Lateral > Leidy SE > Virginia Southside > Rock Springs > Dalton Lateral > Hillabee (Phase 1) > Mobile Bay South III > CPV Woodbridge > Gulf Trace > Garden State > Jackrabbit Propylene > Promesa* > Sabal Trail > Texas-to-Mexico > Parachute Plant > Continue Expansion in Dry Gas > Numerous demand- Gulfstars > Mexican offshore production facilities > Syncrude offgas > Access G&P Expansion > Various offshore tiebacks > Marcellus/ Utica supply to Transco Southeast markets NE PA to Meet Producers’ Growth > New Producers Opportunities for southern Marcellus and Utica > LMM Cantaral and Shamrock System Expansion > Additional Takeaway Projects > Gathering and Processing Opportunities in NW PA & NE OH driven Transco projects > Gulf market area expansions serving LNG and industrial customers > Pacific Connector ! Gulfstar One ! Keathley Canyon Connector ! NE: Frac II ! NE: Ethane line and de-ethanizer ! NE: Oak Grove TXP I ! Bucking Horse Plant In Progress; Potential / under negotiation G - 16 Analyst Day 2015 | May 13, 2015 (ownership option) export pipeline > Geismar 2* > PDH 1 & 2* > Washington Expansion > NGL & Petchem services – other* ! Geismar Expansion** ! Texas Belle* ! Bayou Ethane* * WMB projects expected to be dropped down to WPZ ** Currently in ramp-up © 2015 The Williams Companies, Inc. All rights reserved. Financial Outlook – WMB WPZ’s Expected Growth Drives 31% Increase in Cash Distributions to WMB (Midpoint of guidance1, dollars in millions) > WPZ business expected to grow 34% (16% CAGR) – GP / IDRs expected to grow 47% (21% CAGR) WPZ ADJUSTED EBITDA2 WPZ DISTRIBUTIONS TO WILLIAMS3 (ACCRUED BASIS) 7,000 3,000 16% CAGR 6,000 3 ncr 4% I ease 14% CAGR 5,965 31% Incr eas e 2,805 2,455 5,315 GP/IDRs 21% CAGR 2,140 5,000 4,465 2,000 4,000 3,000 LP 9% CAGR 1,000 2,000 1,000 0 0 2015 2016 2015 2017 2016 2017 1 2015 Notes: adjusted EBITDA and distributable cash flow expected to be near the low end of the guidance range. 2 A more detailed schedule reconciling this non-GAAP measure is provided in this presentation. 3 Distributions reflect per-unit increases of 9% annually in 2016-2017 (midpoint of guidance). Williams owns an approximate 58 percent limited partner interest, a 2 percent general partner interest and the incentive distribution rights (IDRs). G - 17 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. Financial Outlook – WMB Planning Williams 2015 Dividend of $2.38 with Annual Dividend Growth of Approximately 12.5% through 2017 CASH DIVIDENDS PER SHARE GROWTH 2010–2017 CAGR OF 30% ILLUSTRATIVE EXCESS CASH FLOW AVAILABLE & COVERAGE RATIO 1 (millions) $3.50 $3,000 $3.01 $3.00 1.10x $2.68 1.06x $2.38 $2.50 1.05x $2,000 $1.96 $2.00 1.20x Expected Dividends Paid $1.44 $1.50 $1.20 $1.00 Expected Cash Flow Available After Dividends $1,000 $0.78 $0.49 $0.50 $0.00 2010 2011 2012 2013 2014 2015 2016 2017 Actual $0 2014 2015 2016 2017 Guidance Note: 1 Detailed illustrative dividend and coverage calculations are included in the presentation. G - 18 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. Financial Outlook – WMB Expect 10 - 15% Annual Dividend Growth with Expanding Coverage DIVIDEND ILLUSTRATION AND COVERAGE CALCULATION (Midpoint of guidance, dollars in millions except per share amounts) 2015 Distributions from Williams Partners Williams NGL & Petchem Services Adjusted Cash Flow (see below) Corporate Interest $2,455 (260) $2,805 25 (260) 1,880 -2.9% 2,195 0.0% 2,570 0.2% 55 (60) (60) (5) (40) $1,875 $2,135 $2,525 $2.50 $2.83 $3.32 (1,785) 1 WMB Cash Taxes (excludes cash taxes paid by MLP) Corporate Capex and Other WMB Cash Flow Available for Dividends - per share WMB Expected Dividends Paid (2,020) (2,290) $90 $115 $235 1.05x 1.06x 1.10x Excess Cash Flow Available After Dividends Coverage Ratio 2017 $2,140 (5) (255) Subtotal WMB Cash Tax Rate 2016 2 Dividend Per Share $2.38 Annual Growth Rate Williams'NGL'&'Petchem'Services'Adjusted'Cash'Flow: Adjusted'EBITDA'(see'reconciliation'provided'in'this'presentation) Maintenance'Capital Adjusted'Cash'Flow $2.68 $3.01 22% 12.5% 12.5% (5) (5) 5 (5) - 30 (5) 25 Notes: 1 Near-term tax rates are lower than longer-term rates due to accelerated depreciation and deductions related to our investment in ACMP. A 2014 tax Net Operating Loss, due to bonus depreciation, will yield a carryback refund from 2012 and a carryforward reducing taxes through 2017. The average tax rate for 2018–2019 is expected to be approximately 4%, which represents a blended rate on WPZ distributions, WMB NGL Petchem earnings, and corporate interest expense as well other tax items impacting the WMB corporate entity. 2 WMB Cash Flow Available for Dividends / WMB Expected Dividends Paid. G - 19 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. Financial Outlook – WMB WMB Maintains Investment Grade Rating and Has Significant Liquidity > ~$1.2 billion total available liquidity (as of 5/1/15) > $350 million of revolver borrowing (as of 5/1/15) > No significant WMB corporate debt maturities until after 2020 > All debt is fixed rate > Investment grade credit metrics and rating WMB CONSOLIDATED DEBT MATURITIES (DOLLARS IN MILLIONS) $7,000 $6,000 $5,000 $4,000 $4,468 WPZ $1,688 WMB $3,000 $2,000 $2,000 $2,100 $1,250 $375 $785 $500 $32 $21 $371 2016 2017 2018 2019 2020 2021 $1,000 $0 2015 * * $750 million of debt maturing in 1Q 2015 was previously refinanced. G - 20 Analyst Day 2015 | May 13, 2015 $1,500 2022 $1,750 $850 $1,250 2023 2024 2025-2045 2025 © 2015 The Williams Companies, Inc. All rights reserved. Financial Outlook – WMB WMB and WPZ Are Premier Energy-Infrastructure Investments Our Long-Term Strategy remains sound, backlog of projects to serve the demand side of growing natural gas markets continues to build Large-Scale Positions and Strong Competitive Advantages Deep, Diverse, Long-Range Growth Opportunities Provide Visibility Through End of Decade to Growing Fee-Based Cash Flows STRONG CASH DIVIDEND/DISTRIBUTION GROWTH GUIDANCE > WMB cash dividend – projected 12.5% annual growth in 2016 and 2017 with growing coverage > WPZ per-unit cash distribution – expected $3.40 in 2015 with 9% annual growth rate in 2016 and 2017 with growing coverage > $9.7 billion of total 2015-2017 in-guidance growth capex; 99% is focused on fee-based projects > Large inventory of future growth projects with over $30 billion of committed and potential growth capital through 2020 > Strong financially – both WMB and WPZ have investment grade ratings G - 21 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. Appendix Recently Proposed IRS Regulations on MLP Qualified Income Update > On May 5, 2015, the Treasury Department issued proposed regulations providing guidance on the meaning of “qualified income” from activities related to natural resources under Code section 7704(d)(1)(E) > The proposed regulations provide that activities related to olefins derived from natural gas do not generate qualified income Williams view on proposed regulations … > Among other issues, the proposed regulations create a distinction between petroleum and natural gas that does not exist in the statute or legislative history > On July 2, 2012, Williams Partners received a Private Letter Ruling (PLR) from the IRS that income from its olefins assets is qualified > Williams believes its PLR is a correct interpretation of the statute and legislative history G - 23 Analyst Day 2015 | May 13, 2015 We are early in the process … > These proposed regulations are not final and are subject to public comment > Williams is working with other industry participants to develop comments for submission to IRS and Treasury > The process to finalize these regulations could take anywhere from a matter of months to a matter of years Potential implications for Williams and Williams Partners … > The proposed regulations provide a 10 year transition period, beginning when the regulations become final, that would apply to current olefins operations > If, under final regulations, olefins income is no longer considered qualified income, such income from current operations would likely remain significantly less than the 10% threshold due to growth in our qualified income during the 10-year transition period. If nonqualified income was expected to approach or exceed the 10% threshold, including new projects, we would expect to use a “blocker” corporation and other tax planning options to minimize the impact on its tax obligations. © 2015 The Williams Companies, Inc. All rights reserved. Financial Outlook – WMB Sensitivities to price changes (millions) WPZ 2015 Williams NGL & Petchem Services 1 WMB WPZ 2016 Williams NGL & Petchem Services 1 WMB NG ($5.9) + $.10/Mmbtu + $.01/gallon + $.01/pound + $.10/Mmbtu + $.01/gallon + $.01/pound + $.10/Mmbtu + $.01/gallon + $.01/pound Ethane Propane C4+ ($4.2) $3.7 $2.9 Ethylene Propylene 2 $14.4 $1.9 $0.0 $0.1 $14.4 $2.0 Ethylene Propylene 2 $16.0 $2.0 $0.0 $0.8 $16.0 $2.8 ($0.2) $0.1 $0.1 $0.0 ($6.1) ($4.1) NG ($5.2) + $.10/Mmbtu + $.01/gallon + $.01/pound + $.10/Mmbtu + $.01/gallon + $.01/pound + $.10/Mmbtu + $.01/gallon + $.01/pound $3.8 $2.9 Ethane Propane C4+ ($5.0) $3.5 $2.7 ($1.4) $0.7 $0.6 $0.1 ($6.6) ($4.3) $4.1 $2.8 Includes)equity)volumes)associated)with)Opal,)Echo,)Piceance,)Four)Corners,)Mobile)Bay,)Markham,)Discovery,)RGP)SpliDer,)Geismar,)Conway,)and) Canada.))Fixed)margin)and)commodity)exposed)fee)contracts)are)also)taken)into)account.) ) )) )) 1))Includes)equity)volumes)associated)with)Canada)that)are)not)in)WPZ) )) 2))Excludes)volumes)associated)with)RGP)SpliDer) )) )) G - 24 Analyst Day 2015 | May 13, 2015 )) )) © 2015 The Williams Companies, Inc. All rights reserved. Financial Outlook – WMB 2015-2017 WMB and WPZ Guidance 2015 Low Guidance Metric Adjusted+EBITDA+(millions)+ ))))Williams)Partners) Expected ))))Williams)NGL)&)Petchem)Services) Benefits ))))Other) Total+Adjusted+EBITDA+(1)+ ++ Capital+&+Investment+Expenditures+(millions)+ ))))Williams)Partners)Growth) ))))Williams)Partners)Maintenance) ))))Williams)NGL)&)Petchem)Growth) ))))Williams)NGL)&)Petchem)Services)Maintenance) ))))Other)) Total+Capital+&+Investment+Expenditures+ )) Williams+ ))))Cash)Available)for)Dividends)(1)) ))))Cash)Dividends) ))))Dividends)per)Share) ))))Dividend)Coverage)Ra\o)(1)) )) Williams+Partners+ ))))Distributable)Cash)Flow)(1)) ))))Cash)Distribu\ons) ))))Cash)Distribu\ons)per)LP)Unit) ))))Cash)Distribu\on)Coverage)Ra\o)(1))) ))))Pro)Forma)Cash)Distribu\on)Coverage)Ra\o)(2)) Mid )) $4,300)) (5)) 50)) $4,345)) ) ) $3,250)) 430)) 220)) 0)) 60)) $3,960)) )) )) )) )) ) )) $2,845)) $3,010)) $3.40) 0.95x) ) )) $4,465)) (5)) 50)) $4,510)) $3,525)) 430)) 260)) 0)) 60)) $4,275)) 1,875)) 1,785)) $2.38) 1.05x) )) $3,010)) $3,005)) $3.40) 1.00x) 1.05x) 2016 High Low $4,630)) (5)) 50)) $4,675)) ) ) $3,800)) 430)) 300)) 0)) 60)) $4,590)) $5,120)) (5)) 55)) $5,170)) )) $5,315)) 5)) 55)) $5,375)) $2,650)) 430)) 155)) 5)) 60)) $3,300)) $2,925)) 430)) 185)) 5)) 60)) $3,605)) ) ) ) ) ) $3,175)) $2,995)) $3.40) 1.06x) ) Mid )) 2,135)))) 2,020)))) $2.68) )) 1.06x) )) $3,475)) $3,380)) $3.64) 1.03x) $3,675)) $3,440)) $3.71) 1.07x) NA) 2017 High Low $5,510)) 15)) 55)) $5,580)) ) ) $3,200)) 430)) 215)) 5)) 60)) $3,910)) $5,750)) 20)) 55)) $5,825)) )) $5,965)) 30)) 55)) $6,050)) $2,550)) 430)) 0)) 5)) 40)) $3,025)) $2,850)) 430)) 0)) 5)) 40)) $3,325)) High $6,180)) 40)) 55)) $6,275)) ) ) $3,150)) 430)) 0)) 5)) 40)) $3,625)) )) 2,525)))) 2,290)))) $3.01) )) 1.10x) )) ) $3,875)) $3,515)) $3.78) 1.10x) ) Mid $3,960)) $3,770)) $3.89) 1.05x) $4,185)) $3,925)) $4.04) 1.07x) NA) ) $4,410)) $4,090)) $4.19) 1.08x) ) (1) Adjusted EBITDA, cash available for dividends, dividend coverage ratio, distributable cash flow and cash distribution coverage ratio are non-GAAP measures. Reconciliations to the most relevant measures included in GAAP are provided in this presentation. (2) We estimate the 2015 cash distribution coverage ratio would have been approximately 1.05x, assuming Geismar, Keathley Canyon Connector and Gulfstar were in service at expected capacity for full-year 2015. G - 25 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. Financial Outlook – WMB Guidance reflects sharply lower commodity price assumptions 2015 2016 2017 Expected Benefits Commodity Price Assumptions Low Mid High Low Mid High Low Mid High $45.00 $55.00 $65.00 $53.75 $65.00 $76.25 $57.50 $70.00 $82.50 NG – Henry Hub $/MMBtu $2.50 $3.00 $3.50 $2.75 $3.25 $3.75 $3.25 $3.75 $4.25 Composite NGL barrel 36.0 45.0 52.0 41.0 49.0 56.0 46.0 55.0 62.0 29.7 35.0 41.1 32.3 37.6 44.3 34.6 39.5 46.6 36.0 15.0 43.0 19.0 50.0 21.0 39.5 17.0 46.5 21.0 54.0 23.0 43.0 20.0 50.0 25.0 58.0 27.0 Propane - cents/gallon 50.0 60.0 70.0 55.0 65.0 75.0 60.0 70.0 80.0 Propylene spot - cents/pound 40.5 47.5 54.5 41.5 48.5 55.5 43.0 50.0 57.0 Crude – WTI $/barrel for reference only(1) Expected Benefits (2) – cents/gallon Crack Spread - cents/pound(3) Ethylene spot - cents/pound Ethane - cents/gallon (1) No crude oil sales, price provided for reference only (2) Component weighting of composite NGL barrel assuming ethane recovery (ethane 55%, propane 23%, iso-butane 7%, normal butane 5%, C5+ 10%) (3) Crack spread is based on delivered U.S. Gulf Coast ethylene and Mont Belvieu ethane. G - 26 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. Financial Outlook – WMB Tax Rates 2015 First Quarter Year-to-Date Dollars in millions Provision (benefit) at statutory rate $15 35% -4 -9% 1 2% 14 33% 4 9% $30 70% Increases (decreases) in taxes resulting from: Impact of nontaxable noncontrolling interests State income taxes (net of federal benefit) Tax related to prior year foreign taxable income adjustment Other-net Provision (benefit) for income taxes Rates Below Are Based On Income From Continuing Operations Before Income Taxes Full Year Effective Tax Rate Guidance G - 27 Analyst Day 2015 | May 13, 2015 2015 2016 27–29% 27-29% See Williams Dividend Illustration and Coverage Calculation slide, for WMB effective cash tax rates © 2015 The Williams Companies, Inc. All rights reserved. WMB Non-GAAP Reconciliations WMB Non-GAAP Reconciliations WMB Non-GAAP Disclaimer > This presentation includes certain financial measures – adjusted EBITDA, adjusted income from continuing operations (“earnings”), adjusted earnings per share, cash available for dividends, dividend coverage ratio, distributable cash flow and cash distribution coverage ratio – that are non-GAAP financial measures as defined under the rules of the Securities and Exchange Commission > Our segment performance measure, modified EBITDA is defined as net income (loss) before income tax expense, net interest expense, equity earnings from equity-method investments, other net investing income, depreciation and amortization expense, and accretion expense associated with asset retirement obligations for nonregulated operations. We also add our proportional ownership share (based on ownership interest) of modified EBITDA of equity investments. > Adjusted EBITDA further excludes items of income or loss that we characterize as unrepresentative of our ongoing operations and may include assumed business interruption insurance related to the Geismar plant. Management believes this measure provides investors meaningful insight into results from ongoing operations > For Williams, cash available for dividends is defined as cash received from its ownership in MLPs, cash received (used) by its NGL & Petchem Services segment (other than cash for capital expenditures) less interest, taxes and maintenance capital expenditures associated with Williams and not the underlying MLPs. We also calculate the ratio of cash available for dividends to the total cash dividends paid (dividend coverage ratio). This measure reflects Williams’ cash available for dividends relative to its actual cash dividends paid. > For Williams Partners L.P., we define distributable cash flow as adjusted EBITDA less maintenance capital expenditures, cash portion of interest expense, income attributable to noncontrolling interests and cash income taxes plus WPZ restricted stock unit non-cash compensation and certain other adjustments that management believes affects the comparability of results. Adjustments for maintenance capital expenditures and cash potion of interest expense include out proportionate share of these items of our equitymethod investments. > For Williams Partners L.P., we also calculate the ratio of distributable cash flow to the total cash distributed (cash distribution coverage ratio). This measure reflects the amount of distributable cash flow relative to our cash distribution. We have also provided this ratio calculated using the most directly comparable GAAP measure, net income. > This presentation is accompanied by a reconciliation of these non-GAAP financial measures to their nearest GAAP financial measures. Management uses these financial measures because they are accepted financial indicators used by investors to compare company performance. In addition, management believes that these measures provide investors an enhanced perspective of the operating performance of the Company’s assets and the cash that the business is generating. > Neither adjusted EBITDA, adjusted income from continuing operations, cash available for dividends, nor distributable cash flow are intended to represent cash flows for the period, nor are they presented as an alternative to net income or cash flow from operations. They should not be considered in isolation or as substitutes for a measure of performance prepared in accordance with United States generally accepted accounting principles. H - 2 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WMB Non-GAAP Reconciliations WMB Non-GAAP reconciliation schedule 2014* (Dollars in millions, except per-share amounts) 1st Qtr 2nd Qtr 2015 3rd Qtr 4th Qtr Year 1st Qtr Inc ome' (los s )' from' c ontinuing ' operations ' attributable' to' T he' W illiams ' C ompanies ,' Inc .' available' to' c ommon' s toc kholders $%%%%%%%%%140 $%%%%%%%%%%%%%99 $%%%%%%%1,678 $%%%%%%%%%%193 $%%%%%%2,110 $%%%%%%%%%%%%%%%70 Inc ome' (los s )' from' c ontinuing ' operations ' 4' diluted' earning s ' per' c ommon' s hare $%%%%%%%%%%.20 $%%%%%%%%%%%%.14 $%%%%%%%%%2.22 $%%%%%%%%%%.26 $%%%%%%%2.91 $%%%%%%%%%%%%%%.09 $%%%%%%%%%%%%%11 $%%%%%%%%%%%30 Adjus tments : W illiams 'P artners Merger%and%transition%related%expenses $%%%%%%%%%%%— $%%%%%%%%%%%%%— $%%%%%%%%%%41 $%%%%%%%%%%%%%%%32 AcquisitionFrelated%expenses — 2 13 1 16 — Impairment%of%certain%materials%and%equipment — 17 — 35 52 3 S hare%of%impairment%at%equityFmethod%investment — — — — — 8 C ontingency%loss%(gain),%%net%of%legal%costs — — — (143) (143) — Net%gain%related%to%partial%acreage%dedication%release — — (12) — (12) — 6 — — — 6 — G eismar%Incident%adjustment%for%insurance%and%timing 54 96 — (71) 79 — Loss%related%to%G eismar%Incident — — 5 5 10 1 Loss%related%to%Opal%incident — 6 — 2 8 1 Loss%on%sale%of%equipment — — — 7 — Estimated%minimum%volume%commitments%[1] — — 47 (114) (67) 55 Total'W illiams 'P artners 'adjus tments 60 121 64 (248) (3) 100 25 — 70 — 95 — Loss%related%to%compressor%station%fire 7 W illiams 'NG L'&'P etchem'S ervices Bluegrass%Pipeline%project%development%costs 25 1 — Bluegrass%Pipeline%and%Moss%Lake%writeFoff%of%previously%capitalized%project%development%costs 70 — — Total'W illiams 'NG L'&'P etchem'S ervices 'adjus tments 95 1 — WMB%impact%of%AC MP%transactionFrelated%compensation%expenses — — 19 — 19 — TransitionFrelated%costs — — 3 7 10 6 Total'O ther'adjus tments — — 22 7 29 6 155 122 86 121 106 (1) — (1) O ther Adjustments%included%in%Modified%EBITDA (242) *Recast)due)to)the)merger)between)Williams)Partners)L.P.)and)Access)Midstream)Partners,)L.P.)and)the)change)to)Modified)EBITDA)as)our)measure)of)segment)performance)in)first)quarter)2015. H - 3 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WMB Non-GAAP Reconciliations WMB Non-GAAP reconciliation schedule cont’d 2014* (Dollars in millions, except per-share amounts) 1st Qtr 2nd Qtr 2015 3rd Qtr 4th Qtr Year 1st Qtr Adjustments0below0Modified0EBITDA Acquis ition*related0financing0expens es 0*0Williams 0P artners — 9 G ain0on0remeas urement0of0equity*method0inves tment0in0AC MP 0*0O ther — — — (2,522) — (22) 9 2 (2,544) — G ain0as s ociated0with0AC MP 0equity0is s uance0*0O ther — (4) 4 — — Interes t0income0on0receivable0from0s ale0of0Venezuela0as s ets 0*0O ther (13) (14) (14) — (41) — Allocation0of0adjus tments 0to0noncontrolling0interes ts (25) (36) 3 38 (20) (33) 16 (2,596) (31) (38) (45) (2,529) T otal, adjus tments 117 77 (2,443) Less0tax0effect0for0above0items (47) (32) Adjustments0for0taxSrelated0items0[2] (20) 14 925 (3) (226) 41 — (2,475) 75 887 2 (28) (7) 5 Adjus ted, inc ome, from, c ontinuing , operations , available, to, c ommon, s toc kholders , [1] $000000000190 $00000000000158 $0000000000157 $00000000515 $0000000000000122 Adjus ted, diluted, earning s , per, c ommon, s hare, [1] $0000000000.28 $000000000000.23 $00000000000.21 $00000000000.01 $000000000.71 $00000000000000.16 W eig hted(averag e, s hares , (, diluted, (thous ands ) 688,904 700,696 752,064 $00000000000010 751,898 723,641 752,028 0(1) The0third0and0fourth0quarter0of020140have0been0recast0to0include0adjustments0to0normalize0the0quarterly0impact0of0approximately0$1670million0of0annual0minimum0volume0commitments0 related0to0ACMP0that0were0recorded0during0the0fourth0quarter.0The0recast0impacts0adjusted0diluted0earnings0per0common0share0by0an0increase0of0$.060in0the0third0quarter020140and0a0 decrease0of0$.150in0the0fourth0quarter02014,0for0a0total0year0decrease0of0$.09.0 0(2) The0first0quarter0of020140includes0an0unfavorable0adjustment0related0to0completing0the0dropdown0of0certain0Canadian0operations0to0Williams0Partners.0The0second0quarter0of020140 includes0a0favorable0adjustment0to0reflect0taxes0on0undistributed0earnings0of0certain0foreign0operations0that0are0no0longer0considered0permanently0reinvested. Note: The0sum0of0earnings0per0share0for0the0quarters0may0not0equal0the0total0earnings0per0share0for0the0year0due0to0changes0in0the0weightedSaverage0number0of0common0 shares0outstanding. *Recast(due(to(the(merger(between(Williams(Partners(L.P.(and(Access(Midstream(Partners,(L.P.(and(the(change(to(Modified(EBITDA(as(our(measure(of(segment(performance(in(first( quarter(2015. H - 4 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WMB Non-GAAP Reconciliations Reconciliation of Non-GAAP Modified EBITDA to Non-GAAP Adjusted EBITDA 2014* 1st Qtr (Dollars in millions) Net income (loss) $ 2nd Qtr 196 $ 2015 3rd Qtr 127 $ 4th Qtr 1,708 $ Year 308 $ 1st Qtr 2,339 $ 13 (Income) loss from discontinued operations — (4) — — (4) — Provision (benefit) for income taxes 51 84 998 116 1,249 30 140 163 210 234 747 251 Equity (earnings) losses 48 (37) (66) (89) (144) (51) (Gain) on remeasurement of equity-method investments — — (2,522) (22) (2,544) Other investing (income) loss (14) (18) (11) — (43) — 28 113 132 165 438 136 214 214 369 379 1,176 427 3 666 $ 6 648 $ 4 5 822 $ 1,096 $ 708 $ 596 $ 843 $ 1,097 $ (8) (4) (3) Interest expense Proportional Modified EBITDA of equity-method investments Depreciation and amortization expenses Accretion for asset retirement obligations associated with nonregulated operations Modified EBITDA $ $ Williams Partners Williams NGL & Petchem Services (100) Other Total Modified EBITDA $ 58 666 $ 60 648 $ $ 60 $ 121 $ — 18 3,232 $ 6 812 3,244 $ 817 103 3,232 $ — 812 (248) $ (3) $ 100 (1) 95 (115) (17) 2 822 $ 1,096 $ (5) Adjustments included in Modified EBITDA: Williams Partners 95 Williams NGL & Petchem Services Other Total Adjustments included in Modified EBITDA 64 $ 1 — — $ — 155 $ — 122 $ 22 86 $ 7 (242) $ 29 121 $ 6 106 $ 768 $ 717 $ 907 $ 849 $ 3,241 $ 917 (5) (7) (4) (4) $ 58 821 $ 60 770 $ 5 908 $ 9 854 $ $ 6 918 Adjusted EBITDA: Williams Partners Williams NGL & Petchem Services Other Total Adjusted EBITDA (20) (5) 132 3,353 *Recast(due(to(the(merger(between(Williams(Partners(L.P.(and(Access(Midstream(Partners,(L.P.(and(the(change(to(Modified(EBITDA(as(our(measure(of(segment(performance(in( first(quarter(2015. H - 5 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WMB Non-GAAP Reconciliations Net Income to Adjusted EBITDA Reconciliation 2&&&0&&&1&&&5 Net income from continuing operations Add: Net interest expense Add: Provision for income taxes Add: Depreciation & amortization (DD&A) Less: Equity earnings from investments Add: Proportionate share of EBITDA from investments 1 Adjustments Adjusted EBITDA Low WPZ Base High $1,555 855 15 1,705 (380) $1,720 855 15 1,705 (385) $1,885 855 15 1,705 (390) 665 670 (115) $4,300 (115) $4,465 Low WPZ Base Net income from continuing operations Add: Net interest expense Add: Provision for income taxes Add: Depreciation & amortization (DD&A) Less: Equity earnings from investments $2,025 965 25 1,800 (495) Add: Proportionate share of EBITDA from investments Adjustments Adjusted EBITDA 675 (115) $4,630 WMB&NGL&PETCHEM Low Base High $0 (15) 10 ($5) $0 (15) 10 - $0 (15) 10 - CORPORATE&/&OTHER Low Base High Low ($630) 255 365 35 - $925 1,095 380 1,750 (380) - ($5) ($5) ($670) 255 405 35 - ($710) 255 445 35 - - - - 25 $50 25 $50 25 $50 665 (90) $4,345 TOTAL&WMB Base $1,050 1,095 420 1,750 (385) 670 (90) $4,510 High $1,175 1,095 460 1,750 (390) 675 (90) $4,675 2&&&0&&&1&&&6 High WMB&NGL&PETCHEM Low Base High CORPORATE&/&OTHER Low Base High Low $2,225 960 25 1,800 (505) $2,425 955 25 1,800 (515) ($20) (10) 25 - ($5) (5) 25 - ($730) 260 480 45 - ($778) 260 528 45 - ($825) 260 575 45 - $1,275 1,225 495 1,870 (495) $1,435 1,220 545 1,870 (505) $1,595 1,215 595 1,870 (515) 800 $5,120 810 $5,315 820 $5,510 ($5) $15 $55 $55 $55 800 $5,170 810 $5,375 820 $5,580 Low WPZ Base High CORPORATE&/&OTHER Low Base High Low TOTAL&WMB Base Net income from continuing operations Add: Net interest expense Add: Provision for income taxes Add: Depreciation & amortization (DD&A) Less: Equity earnings from investments $2,465 1,075 25 1,875 (645) $2,690 1,065 25 1,875 (660) $2,915 1,055 25 1,875 (675) ($5) 25 - $5 25 - $15 25 - ($810) 260 560 45 - ($870) 260 620 45 - ($930) 260 680 45 - $1,650 1,335 585 1,945 (645) $1,825 1,325 645 1,945 (660) $2,000 1,315 705 1,945 (675) Add: Proportionate share of EBITDA from investments Adjustments Adjusted EBITDA 955 $5,750 970 $5,965 985 $6,180 $20 $30 $40 $55 $55 $55 955 $5,825 970 $6,050 985 $6,275 ($12.5) (7.5) 25 $5 TOTAL&WMB Base High 2&&&0&&&1&&&7 WMB&NGL&PETCHEM Low Base High Notes: 1 A detailed schedule of 2015 adjustments is provided in this presentation. H - 6 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. High WMB Non-GAAP Reconciliations WMB and WPZ 2015 Schedule of Expected EBITDA Adjustments (Dollars in millions) Williams'Partners'(WPZ) Geismar'incident'adjustment'for'insurance'and'timing ACMP'retention'expenses Total&Williams&Partners&adjustments ' Williams'Corporate'/'Other'Adjustments: ACMP'acquisition'related'expenses ' !Total!WMB!Adjustments H - 7 Analyst Day 2015 | May 13, 2015 '''''''(150) '''''''''''35 '''''''(115) ' '''''''''''25 ' !!!!!!!!!(90) © 2015 The Williams Companies, Inc. All rights reserved. WPZ Non-GAAP Reconciliations WPZ Non-GAAP Reconciliations WPZ Non-GAAP Disclaimer > This presentation includes certain financial measures – adjusted EBITDA, distributable cash flow, and cash distribution coverage ratio – that are non-GAAP financial measures as defined under the rules of the Securities and Exchange Commission > Our segment performance measure, modified EBITDA, is defined as net income (loss) before income tax expense, net interest expense, equity earnings from equity-method investments, other net investing income, depreciation and amortization expense, and accretion expense associated with asset retirement obligations for nonregulated operations. We also add our proportional ownership share (based on ownership interest) of modified EBITDA of equity investments. > Adjusted EBITDA further excludes items of income or loss that we characterize as unrepresentative of our ongoing operations and may include assumed business interruption insurance related to the Geismar plant. Management believes this measure provides investors meaningful insight into results from ongoing operations. > We define distributable cash flow as adjusted EBITDA less maintenance capital expenditures, cash portion of interest expense, income attributable to noncontrolling interests and cash income taxes plus WPZ restricted stock unit non-cash compensation and certain other adjustments that management believes affects the comparability of results. Adjustments for maintenance capital expenditures and cash portion of interest expense include our proportionate share of these items of our equity-method investments. > We also calculate the ratio of distributable cash flow to the total cash distributed (cash distribution coverage ratio). This measure reflects the amount of distributable cash flow relative to our cash distribution. We have also provided this ratio calculated using the most directly comparable GAAP measure, net income. > This presentation is accompanied by a reconciliation of these non-GAAP financial measures to their nearest GAAP financial measures. Management uses these financial measures because they are accepted financial indicators used by investors to compare company performance. In addition, management believes that these measures provide investors an enhanced perspective of the operating performance of the Partnership's assets and the cash that the business is generating. > Neither adjusted EBITDA, nor distributable cash flow are intended to represent cash flows for the period, nor are they presented as an alternative to net income or cash flow from operations. They should not be considered in isolation or as substitutes for a measure of performance prepared in accordance with United States generally accepted accounting principles H - 9 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ Non-GAAP Reconciliations Reconciliation of Non-GAAP distributable cash flow to GAAP net income 2014* (Dollars in millions, except coverage ratios) 2015 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr Year 1st Qtr $%%%%%%352 %%%%%%%%%%%%8 $%%%%%%%223 %%%%%%%%%%%%%5 $%%%%%%247 %%%%%%%%%%10 $%%%%%%462 %%%%%%%%%%%%6 $%%%1,284 %%%%%%%%%%29 $%%%%%%%112 %%%%%%%%%%%%3 %%%%%%%%106 %%%%%%%%%126 %%%%%%%%154 %%%%%%%%176 %%%%%%%%562 %%%%%%%%192 W illiams ' P artners ' L .P . Reconciliation*of*G AAP *"Net*Income"*to*Non3G AAP *"Modifed*EBITDA",*"Adjus ted*EBITDA",*and*"Dis tributable*cas h*flow” Net%income Provision%(benefit)%for%income%taxes Interest%expense Equity%(earnings)%losses Other%investing%(income)%loss %%%%%%%%(23) %%%%%%%%%(32) %%%%%%%%(85) %%%%%%%%(88) %%%%%%(228) — (1) — (1) (2) %%%%%%%%%(51) (1) Proportional%Modified%EBITDA%of%equityXmethod%investments %%%%%%%%%%54 %%%%%%%%%%%62 %%%%%%%%150 %%%%%%%%165 %%%%%%%%431 %%%%%%%%136 Depreciation%and%amortization%expenses %%%%%%%%208 %%%%%%%%%207 %%%%%%%%364 %%%%%%%%372 %%%%%%%1,151 %%%%%%%%419 Accretion%for%asset%retirement%obligations%associated%with%nonregulated%operations %%%%%%%%%%%%3 %%%%%%%%%%%%%6 %%%%%%%%%%%%3 %%%%%%%%%%%%5 %%%%%%%%%%17 %%%%%%%%%%%%7 %%%%%%%%708 %%%%%%%%%596 %%%%%%%%843 %%%%%1,097 %%%%%3,244 %%%%%%%%817 Modified%EBITDA Adjustments Estimated%minimum%volume%commitments — — 47 (114) AcquisitionXrelated%expenses — 2 13 1 (67) 55 16 Merger%and%transition%related%expenses — — 11 S hare%of%impairment%at%equityXmethod%investment — — — — 30 41 32 — — G eismar%Incident%adjustment%for%insurance%and%timing 54 96 — 8 (71) 79 — Loss%related%to%G eismar%Incident — — 5 Impairment%of%certain%materials%and%equipment — 17 — 35 52 3 C ontingency%loss%(gain),%%net%of%legal%costs — — — (143) (143) — Net%gain%related%to%partial%acreage%dedication%release — 5 10 1 — (12) — (12) — 6 — — — 6 — Loss%related%to%Opal%incident — 6 — 2 8 Loss%on%sale%of%equipment — 60 — 121 — 64 $%%%%%%768 $%%%%%%%717 $%%%%%%907 Loss%related%to%compressor%station%fire Total%EBITDA%adjustments Adjusted%EBITDA 7 (248) $%%%%%%849 1 7 (3) — 100 $%%%3,241 $%%%%%%917 *Re c a st%due %to%the %me rg e r%be twe e n%Willia ms%P a rtne rs%L.P .%a nd%Ac c e ss%Midstre a m%P a rtne rs,%L.P .%a nd%the %c ha ng e %to%Modifie d%EBITDA%a s%our%me a sure %of%se g me nt%pe rforma nc e %in%first%qua rte r%2015. (1) Note s:% %Inc lude s%proportiona te %sha re %of%ma inte na nc e %c a pita l%e xpe nditure s%of%e quity%inve stme nts. (2) % %Inc lude s%proportiona te %sha re %of%inte re st%e xpe nse %of%e quity%inve stme nts. H - 10 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ Non-GAAP Reconciliations Reconciliation of Non-GAAP distributable cash flow to GAAP net income cont’d 2014* 1st Qtr (Dollars in millions, except coverage ratios) 2015 2nd Qtr 3rd Qtr 4th Qtr Year Maintenance,capital,expenditures, (1) Interest,expense,(cash,portion),(2) Cash,taxes Income,attributable,to,noncontrolling,interests WPZ,restricted,stock,unit,nonYcash,compensation Plymouth,incident,adjustment 1st Qtr (54) (204) (1) (23) 7 4 Distributable,cash,flow,attributable,to,Partnership,Operations 646 Total,cash,distributed $,,,,,,725 C overag e( ratios : Distributable,cash,flow,attributable,to,partnership,operations,divided,by,Total,cash,distributed ,,,,,,,0.89 Net,income,divided,by,Total,cash,distributed ,,,,,,,0.15 *Re c a st,due ,to,the ,me rg e r,be twe e n,Willia ms,P a rtne rs,L.P .,a nd,Ac c e ss,Midstre a m,P a rtne rs,,L.P .,a nd,the ,c ha ng e ,to,Modifie d,EBITDA,a s,our,me a sure ,of,se g me nt,pe rforma nc e ,in,first,qua rte r,2015. (1) Note s:, ,Inc lude s,proportiona te ,sha re ,of,ma inte na nc e ,c a pita l,e xpe nditure s,of,e quity,inve stme nts. (2) , ,Inc lude s,proportiona te ,sha re ,of,inte re st,e xpe nse ,of,e quity,inve stme nts. H - 11 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ Non-GAAP Reconciliations Reconciliation of Non-GAAP Modified EBITDA to Non-GAAP Adjusted EBITDA 2014* (Dollars in millions) Modified&E BITDA: Access1Midstream Northeast1G&P Atlantic(Gulf West NGL1&1Petchem1S ervices Other Total&Modified&E BITDA 1st Qtr $ $ Adjustments: Total&Access&Midstream&adjustments Total&Northeast&G &P&adjustments Total&Atlantic<G ulf&adjustments Total&West&adjustments Total&NG L&&&Petchem&S ervices&adjustments Total&Other&adjustments Total&Adjustments Adjusted&E BITDA: Access1Midstream Northeast1G&P Atlantic(Gulf West NGL1&1Petchem1S ervices Other Total&Adjusted&E BITDA 2nd Qtr — $ 48 266 212 182 — 708 $ — 6 — — 54 — $ $ $ 60 3rd Qtr (2) $ 59 270 199 72 (2) 596 $ 2 17 — 6 96 — $ — $ 54 266 212 236 — 768 $ 121 2015 4th Qtr 254 $ 80 271 224 17 (3) 843 $ 68 (12) — — 5 3 $ — $ 76 270 205 168 (2) 717 $ 64 390 $ 208 258 188 53 — 1,097 $ (65) (130) 10 2 (66) 1 Year 1st Qtr 642 395 1,065 823 324 (5) 3,244 $ $ 228 90 335 161 6 (3) 817 5 (119) 10 8 89 4 86 10 — 1 1 2 $ (248) $ (3) $ 100 322 $ 68 271 224 22 — 907 $ 325 $ 78 268 190 (13) 1 849 $ 647 276 1,075 831 413 (1) 3,241 $ 314 100 335 162 7 (1) 917 $ *Recast(due(to(the(merger(between(Williams(Partners(L.P.(and(Access(Midstream(Partners,(L.P.(and(for(the(change(to(Modified(EBITDA(as(our(measure(of(segment(performance(in( first(quarter(2015. H - 12 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ Non-GAAP Reconciliations Adjustments to Modified EBITDA by Segment 2014* (Dollars in millions) 1st Qtr Adjustments: Access Midstream Acquisition-related expenses Merger and transition costs Loss on sale of equipment Impairment of certain materials and equipment Estimated minimum volume commitments Total Access Midstream adjustments Northeast G&P Share of impairment at equity-method investment Contingency (gain) loss, net of legal costs Loss related to compressor station fire Net gain related to partial acreage dedication release Impairment of certain materials and equipment Total Northeast G&P adjustments Atlantic-Gulf Impairment of certain equipment Total Atlantic-Gulf adjustments West Loss related to Opal incident Total West adjustments NGL & Petchem Services Loss related to Geismar Incident Geismar Incident adjustment for insurance and timing Total NGL & Petchem Services adjustments Other WPZ conflicts committee costs associated with merger Total Other adjustments $ 2nd Qtr 2015 3rd Qtr 4th Qtr Year 1st Qtr — $ — — — — — 2 $ — — — — 2 13 $ 8 — — 47 68 1 $ 29 7 12 (114) (65) 16 37 7 12 (67) 5 $ — 30 — 1 55 86 — — 6 — — 6 — — — — 17 17 — — — (12) — (12) — (143) — — 13 (130) — (143) 6 (12) 30 (119) 8 — — — 2 10 — — — — — — 10 10 10 10 — — — — 6 6 — — 2 2 8 8 1 1 — 54 54 — 96 96 5 — 5 5 (71) (66) 10 79 89 1 — 1 — — — — 3 3 1 1 4 4 2 2 Total Adjustments $ 60 $ 121 $ 64 $ (248) $ (3) $ 100 *Recast(due(to(the(merger(between(Williams(Partners(L.P.(and(Access(Midstream(Partners,(L.P.(and(for(the(change(to(Modified(EBITDA(as(our(measure(of(segment(performance(in( first(quarter(2015. H- 13 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved. WPZ Non-GAAP Reconciliations Net Income to Adjusted EBITDA Reconciliation ('$$in$millions) Net income from continuing operations Add: Net interest expense Add: Provision for income taxes Add: Depreciation & amortization (DD&A) Less: Equity earnings from investments Add: Proportionate share of EBITDA from investments Adjustments 1 2 Adjusted EBITDA 1)#Proportionate#Share#of#EBITDA#from#investments: Net income from continuing operations Add: Net interest expense Add: Depreciation & amortization (DD&A) Other Adjusted EBITDA from Equity Investments Low 2---0---1---5 Base High Low 2---0---1---6 Base High Low 2---0---1---7 Base High $1,555 $1,720 $1,885 $2,025 $2,225 $2,425 $2,465 $2,690 $2,915 855 855 855 965 960 955 1,075 1,065 1,055 15 15 15 25 25 25 25 25 25 1,705 1,705 1,705 1,800 1,800 1,800 1,875 1,875 1,875 (380) (385) (390) (495) (505) (515) (645) (660) (675) 665 670 675 800 810 820 955 970 985 (115) (115) (115) - - - - - - $4,300 $4,465 $4,630 $5,120 $5,315 $5,510 $5,750 $5,965 $6,180 Low 2--0--1--5 Base High Low 2--0--1--6 Base High Low 2--0--1--7 Base High $380 $385 $390 $495 $505 $515 $645 $660 53 53 53 58 58 58 61 61 61 206 206 206 226 226 226 236 236 236 26 26 26 21 21 21 13 13 13 $665 $670 $675 $800 $810 $820 $955 $970 $985 2)#Adjustments: Low Geismar#incident#adjustment#for#insurance#and#timing ($150) ACMP#acquisitionErelated#expenses Total$Adjustments H - 14 Analyst Day 2015 | May 13, 2015 $675 ##########35 ($115) 2--0--1--5 Base High Low 2--0--1--6 Base High Low 2--0--1--7 Base High ($150) #########35 ($115) ($150) #########35 ($115) ############E ############E ############E ############E ############E ############E ############E ############E ############E ############E ############E ############E ############E ############E ############E ############E ############E ############E © 2015 The Williams Companies, Inc. All rights reserved. WPZ Non-GAAP Reconciliations Distributable Cash Flow (DCF) Dollars'in'millions,'except'per'L.P.'unit 1 Adjusted(EBITDA( Less:(Maintenance(Capex(2 Low 2""""0""""1""""5 Base High Low 2""""0""""1""""6 Base High Low 2""""0""""1""""7 Base High $4,300 $4,465 $4,630 $5,120 $5,315 $5,510 $5,750 $5,965 $6,180 (430) (430) (430) (440) (440) (440) (440) (440) (440) Less:(Interest(Expense((cash(portion)( Less:(Cash(Taxes Less:(Noncontrolling(Interests Distributable(Cash(Flow(Attributable(to(Partnership(Operations (885) (5) (135) $2,845 (885) (5) (135) $3,010 (885) (5) (135) $3,175 (1,000) (10) (195) $3,475 (995) (10) (195) $3,675 (990) (10) (195) $3,875 (1,110) (10) (230) $3,960 (1,100) (10) (230) $4,185 (1,090) (10) (230) $4,410 Cash(Distributions((accrued) ((HHH((per(L.P.(Unit $3,010 $3.40 $3,005 $3.40 $2,995 $3.40 $3,380 $3.64 7% $3,440 $3.71 9% $3,515 $3.78 11% $3,770 $3.89 7% $3,925 $4.04 9% $4,090 $4.19 11% 1.03x 1.07x 1.10x 1.05x 1.07x 1.08x 3 !!"""!!Annual!growth!rate Cash(Distribution(Coverage(Ratio 0.95x 1.00x 1.06x Note: 1 A more detailed schedule reconciling this non-GAAP measure is provided in this presentation. 2 Includes proportionate share of maintenance capex of equity investments 3 Includes proportionate share of interest expense of equity investments H - 15 Analyst Day 2015 | May 13, 2015 © 2015 The Williams Companies, Inc. All rights reserved.
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