Fastest-Growing Companies in the Fortune 1000 by revenue

May 6, 2013, 11:36 AM UTC
Fortune

Apollo Global Management

Apollo Global Management

Apollo Global Management is a global alternative investment manager headquartered in New York City. It raises, invests and manages funds on behalf of some of the world's most prominent pension and endowment funds as well as other institutional and individual investors.

Apollo Global Management is a global alternative investment manager headquartered in New York City. It raises, invests and manages funds on behalf of some of the world's most prominent pension and endowment funds as well as other institutional and individual investors.

Leucadia National

Leucadia National

Leucadia National Corp. is a holding company. In 2012 it began a merger with Jefferies that was finalized in March 2013.

Leucadia National Corp. is a holding company. In 2012 it began a merger with Jefferies that was finalized in March 2013.

Colfax

Colfax Corp., based out of Fulton, Md., is a global industrial manufacturing and engineering company that develops, manufactures, engineers and services fluid handling systems.

Alleghany

Alleghany

Alleghany Corp. provides property, casualty reinsurance, insurance and financial services.

Alleghany Corp. provides property, casualty reinsurance, insurance and financial services.

KKR

KKR

KKR is a global investment firm specializing in private equity.

KKR is a global investment firm specializing in private equity.

Annaly Capital Management

Kristopher R. Konrad

Annaly Capital Management is a real estate investment trust that owns and manages a portfolio of mortgage-backed securities.

Superior Energy Services

Superior Energy Services

Superior Energy Services, Inc. provides oil field services to oil and gas companies operating worldwide.

Superior Energy Services, Inc. provides oil field services to oil and gas companies operating worldwide.

Energy Transfer Equity

Energy Transfer Equity

Energy Transfer Equity started as a natural gas pipeline operator in Texas and now also works with NGLs, and crude oil and refined products.

Energy Transfer Equity started as a natural gas pipeline operator in Texas and now also works with NGLs, and crude oil and refined products.

Express Scripts Holding

Express Scripts Holding

Express Scripts is a prescription drug benefits manager. It acquired Medco in 2012, which more than doubled sales.

Express Scripts is a prescription drug benefits manager. It acquired Medco in 2012, which more than doubled sales.

SandRidge Energy

SandRidge Energy

SandRidge Energy is an oil and gas company operating in northern Oklahoma, western Kansas. It also has assets in the Gulf of Mexico.

SandRidge Energy is an oil and gas company operating in northern Oklahoma, western Kansas. It also has assets in the Gulf of Mexico.

Nexeo Solutions Holdings

Nexeo Solutions Holdings

Nexeo Solutions is a Texas-based company that distributes chemicals, plastics, composites and environmental services.

Nexeo Solutions is a Texas-based company that distributes chemicals, plastics, composites and environmental services.

Ecolab

Ecolab makes and distributes cleaning and sanitizing products.

Prudential Financial

Prudential Financial

The financial services provider's sales jumped to $81 billion in 2012.

The financial services provider's sales jumped to $81 billion in 2012.

Rock-Tenn

Rock-Tenn

Rock-Tenn manufactures packaging products, including recycled paperboard, containerboard, bleached paperboard and merchandising displays.

Rock-Tenn manufactures packaging products, including recycled paperboard, containerboard, bleached paperboard and merchandising displays.

AGL Resources

AGL Resources

AGL Resources is a company specializing in natural gas distribution, marketing and energy services.

AGL Resources is a company specializing in natural gas distribution, marketing and energy services.

Centene

Centene

Centene Corp. provides healthcare programs and services to 17 states in the Northeast, South and Pacific Northwest.

Centene Corp. provides healthcare programs and services to 17 states in the Northeast, South and Pacific Northwest.

United Rentals

United Rentals

United Rentals sells and rents commercial construction, HVAC and other heavy equipment.

United Rentals sells and rents commercial construction, HVAC and other heavy equipment.

Continental Resources

Continental Resources

Continental Resources is a U.S. petroleum liquid producer.

Continental Resources is a U.S. petroleum liquid producer.

Calumet Specialty Products

Calumet Specialty Products

Calumet Specialty Products is a refiner and processor of specialty hydrocarbon products.

Calumet Specialty Products is a refiner and processor of specialty hydrocarbon products.

Level 3 Communications

Level 3 Communications

Level 3 Communications is an international communications company and a Tier 1 Internet provider based in Broomfield, Colo.

Level 3 Communications is an international communications company and a Tier 1 Internet provider based in Broomfield, Colo.

Green Mountain Coffee Roasters

Green Mountain Coffee Roasters

Green Mountain Coffee Roasters is a coffee brand based in Waterbury, Vt. The company owns Keurig.

Green Mountain Coffee Roasters is a coffee brand based in Waterbury, Vt. The company owns Keurig.

Groupon

Groupon is a daily deals website that features a variety of goods and services.

Apple

Apple

Apple is a technology company that makes iEverything: computers, tablets, and phones.

Apple is a technology company that makes iEverything: computers, tablets, and phones.

Windstream

Windstream

Windstream, formerly known as Valor Communications, provides voice, broadband and entertainment services.

Windstream, formerly known as Valor Communications, provides voice, broadband and entertainment services.

Verifone Systems

Verifone Systems

Verifone provides technology for electronic payment transactions and value-added services at the point of sale.

Verifone provides technology for electronic payment transactions and value-added services at the point of sale.