WILLIAMS - WE MAKE ENERGY HAPPENPrimarily operating in North America, which gathers, processes and transports natural gas,

Williams is a leading energy infrastructure company.

Northeast Supply Enhancement

WILLIAMS – WE MAKE ENERGY HAPPEN

Williams is a leading energy infrastructure company, primarily operating in North America, which gathers, processes and transports natural gas. Our operations are concentrated in the Pacific Northwest, Rocky Mountains, Gulf Coast, Canada and Eastern Seaboard.

OUR OPERATING AREAS

> CentralCentral consists of natural gas gathering systems and other midstream energy assets in attractive growth basins in the central and southern United States, including the Barnett Shale, Eagle Ford Shale, Haynesville Shale, Mid-Continent and Permian.

> Northeast G&PNortheast G&P includes midstream gathering and processing business in the Marcellus and Utica shale regions, including Susquehanna Supply Hub and Ohio Valley Midstream, as well as equity investments in Laurel Mountain Midstream and Caiman Energy II.

> Atlantic-GulfAtlantic-Gulf includes the Transco interstate gas pipeline and a 41-percent interest in the Constitution interstate gas pipeline development project. The segment also includes significant natural gas gathering and processing and crude production handling and transportation in the Gulf Coast region.

> WestWest includes Northwest Pipeline interstate gas pipeline system, as well as gathering, processing and treating operations in Wyoming, the Piceance Basin and the Four Corners area.

> NGL & Petchem ServicesNGL & Petchem Services includes a majority interest in an olefins production facility in Geismar, La., along with a refinery grade propylene splitter and pipelines in the Gulf Coast region, as well as Canadian NGL and olefins facilities, an NGL fractionator and storage facilities near Conway, Kan. and a 50-percent interest in Overland Pass Pipeline.

WHAT WE DO

Williams is one of North America’s largest natural gas gatherers and processors, dedicated to becoming the most reliable midstream service provider in the industry. We focus on running large-scale assets safely and reliably.

Williams’ midstream operations:

– are one of the largest producers of natural gas liquids in North America

– provide critical infrastructure to producers in the deepwater Gulf of Mexico

– include the world’s only processor of oil sands off-gas

Williams provides safe, reliable natural gas transportation to heat homes and generate electricity across the nation. Natural gas pipelines are a vital and efficient part of the United States’ energy infrastructure. Williams operates three interstate pipelines, serving the Northeast, Eastern Seaboard, Florida and the Northwest.

Williams has many ongoing efforts to increase public awareness about pipeline safety and damage prevention. In addition, the company is involved in various industry efforts to keep our natural gas pipeline infrastructure safe. In 2007, Williams was recognized by the U.S. Department of Transportation and the Common Ground Alliance for leadership in damage prevention.

COMPANY DATA

– Williams’ headquarters are located in Tulsa, Okla. Other major offices are in Salt Lake City, Houston, Pittsburgh and Oklahoma City. We have operations in 24 states, as well as in Canada.

– Williams employs approximately 7,000 people.

– Williams ranks No. 370 on the 2015 FORTUNE® 500 list.

– President and CEO: Alan Armstrong.

– Williams is an equal opportunity employer and does not discriminate in any employer/employee relations based on race, color, religion, sex, sexual orientation, national origin, age disability or veteran’s status.

– Williams common stock (WMB) is listed on the New York stock exchange.

– Most of Williams’ midstream and gas pipeline assets are owned by Williams Partners L.P. (NYSE:WPZ), a master limited partnership. Williams owns 60 percent of Williams Partners, including the general-partner interest.

– The company was founded in 1908.

– Williams Partners owns and operates more than 33,000 miles of pipelines system wide, including the nation’s largest volume and fastest growing pipeline, providing natural gas for clean-power generation, heating and industrial use.

– Williams’ facilities have daily gathering capacity of 17 billion cubic feet of natural gas, processing capacity of 7 billion cubic feet of natural gas, NGL production of more than 400,000 barrels per day and domestic olefins production capacity of 1.95 billion pounds of ethylene and 800 million pounds of propylene per year.

– In 2015, FORTUNE® magazine recognized Williams as the Most Admired U.S. Energy Company.

– In 2015, Williams received a Platts 2015 Global Energy Award for its industry leadership in the midstream sector.

– In 2015, Williams and its employees gave more than $13.5 million to help meet community needs across the country.

PROVIDING NATURAL GAS SERVICES

NORTH AMERICAN OPERATIONS AND ASSETS

(800) WILLIAMS | www.williams.com

© 2016 The Williams Companies, Inc. All rights reserved. 0116/02091fs001

STRATEGY DRIVES PERFORMANCE

– Williams’ focus is on building large-scale, market-integrated infrastructure to meet demand for gathering, processing and transportation capacity.

– Williams continues to expand its Transco pipeline, the largest volume natural gas transmission system in the nation, to serve high-growth markets in the eastern United States.

– In 2014, Williams’ businesses generated $7.6 billion in revenue.

– The interest in natural gas as a cleaner-burning alternative to other hydrocarbon-based energy sources will continue to drive the demand for natural gas.

– Williams is committed to balancing our nation’s energy needs with concerns for environmental impact, national security and cost-effective fuel choices. More information about Williams’ commitment to corporate responsibility is available on our website, www.williams.com.

Media contact: 918-573-4034Investor contact: 918-573-2362

MultipleNGL

ProductsNGL End UserNGL Storage

Natural Gas

Natural GasEnd User

MixedNGLs

Fractionation FacilitiesGas Processing Plants

Transportation Lines/Storage

GatheringNGL Transportation

Lines/Rail and Truck

MIDSTREAM

GAS PIPELINE