Who is the largest government contractor?

By federal contract dollars from FY2024 to FY2026, the largest government contractor registration was Optum Public Sector Solutions, Inc., with $65.1B in contract obligations. The next largest were Lockheed Martin Corporation and Electric Boat Corporation.

How do I become a government contractor?

Register your business for free in SAM.gov to get a Unique Entity ID (UEI), choose the NAICS codes for what you sell, and check which small business certifications you qualify for. Then search open government contracts on SAM.gov, or start as a subcontractor to one of the prime contractors on this list.

Why does the same company appear more than once?

Federal spending is reported per registration (UEI), and large companies often hold several: one per division, site or joint venture. Each registration has its own page with its own figures.

How can a small business work with large government contractors?

Most large prime contractors buy goods and services from small businesses as subcontractors, and many must meet small business subcontracting goals. Look at which agencies and industries a prime contractor works in, then contact its small business liaison office. You need a free SAM.gov registration to win federal work directly.

Where does this government contractor data come from?

Contract obligations come from USAspending.gov, the public record of federal spending. Figures cover contracts only (not grants or loans) from FY2024 to FY2026 and are refreshed weekly.

Top Government Contractors

This government contractors list ranks the 440 largest federal contractors by contract dollars from FY2024 to FY2026. Together they received $1.3T in federal contract obligations.

The three largest were Optum Public Sector Solutions ($65.1B), Lockheed Martin ($63.8B), Electric Boat ($42.9B).

How to use this prime contractors list

Open any company to see which agencies award it contracts, the industries (NAICS codes) it works in, where the work is performed and its most recent contract awards. Small businesses use this to:

find prime contractors to approach for subcontracting work in their industry,
research competitors before bidding on a contract, and
see which agencies buy what they sell.

To narrow it down, start from an industry, an agency or a state; each page lists its top contractors.

Largest federal contractors by contract dollars(page 1 of 10)

Largest federal contractors by contract dollars
#	Contractor	Obligated
1	Optum Public Sector Solutions, Inc.UEI XMUZGJN98231	$65,126,122,382
2	Lockheed Martin CorporationUEI G4KDGE4JFFK7	$63,812,504,970
3	Electric Boat CorporationUEI E7BEKJ4V9528	$42,869,044,790
4	Triwest Healthcare Alliance CorpUEI J7M9HPTGJ1S9	$38,366,512,085
5	McKesson CorporationUEI S1RUKWWRYFL6	$34,366,630,958
6	Lockheed Martin CorporationUEI XFJMYSYFJEK4	$34,249,133,723
7	Raytheon CompanyUEI VTEWM5QSE598	$30,037,806,948
8	The Boeing CompanyUEI JJM4FRDZJDX1	$21,284,022,603
9	RTX CorporationUEI QN1BCFY7JDJ5	$21,266,058,807
10	Humana Government Business IncUEI ZE6ZM6NKSV43	$20,175,882,997
11	Amerisourcebergen Drug CorpUEI KABZK8W6PQT3	$20,116,956,607
12	Booz Allen Hamilton IncUEI JCBMLGPE6Z71	$19,738,252,564
13	The Boeing CompanyUEI WZWRLY4G3PL8	$18,536,767,120
14	Atlantic Diving Supply, Inc.UEI GJMSFBCNMSK3	$16,166,558,455
15	National Technology & Engineering Solutions of Sandia, LLCUEI LUJEPCRRT377	$16,111,538,890
16	Triad National Security, LLCUEI X7WUS5LRBQU3	$15,853,039,250
17	Fisher Sand & Gravel CoUEI XAVBDA4D13N7	$14,402,267,256
18	General Dynamics Information Technology, Inc.UEI SMNWM6HN79X5	$14,351,829,382
19	Lockheed Martin CorporationUEI H7PNSVNN5827	$13,758,205,128
20	Science Applications International CorporationUEI MMLKPW9JLX64	$13,193,642,066
21	Sikorsky Aircraft CorporationUEI UTJWTSLMFNG4	$12,673,592,853
22	Huntington Ingalls IncorporatedUEI C3NLZNSMU254	$11,914,280,517
23	Huntington Ingalls IncUEI WMXDDH6HJNA5	$11,468,309,709
24	Fluor Marine Propulsion, LLCUEI CWHMVCX7K1N6	$11,299,135,032
25	Amentum Services, Inc.UEI QEMLRQA7PLG4	$10,722,280,952
26	Lawrence Livermore National Security, LLCUEI PM52LCJH72T9	$10,510,785,096
27	Accenture Federal Services LLCUEI C47BNA8GM833	$10,099,130,985
28	Raytheon CompanyUEI XSV6AZJ6SDJ7	$9,954,941,796
29	CACI, Inc. - FederalUEI N3PBJAVNKF61	$9,581,468,850
30	Consolidated Nuclear Security, LLCUEI EWV8QKG1JUV7	$9,523,044,978
31	Deloitte Consulting LLPUEI CKV2L9GZKJK3	$9,437,512,654
32	Space Exploration Technologies Corp.UEI C6M7C2FLKER5	$9,369,124,689
33	Leidos, Inc.UEI UE9QJD4KK1L6	$8,587,535,073
34	Northrop Grumman Systems CorpUEI D8QQPFNYJD63	$8,279,573,769
35	Ut-Battelle LLCUEI ZLHJJ57QA2H8	$8,217,574,971
36	Lockheed Martin CorporationUEI CWM4UN76ZQW8	$7,892,623,043
37	Lockheed Martin CorpUEI FYHNA5WC8XD7	$7,885,087,825
38	Savannah River Nuclear Solutions LLCUEI XLQ7CKUSQSD5	$7,457,387,443
39	QTC Medical Services IncUEI GN8YP96TMPK6	$7,192,570,228
40	Raytheon CompanyUEI YD6LTFVUZNG1	$7,106,422,835
41	Bath Iron Works CorporationUEI FREEMCLKFXE3	$6,640,401,256
42	California Institute of TechnologyUEI YC1YP79BFD19	$6,593,822,954
43	The Johns Hopkins University Applied Physics Laboratory LLCUEI C1HBCJ9RMBV3	$6,548,514,544
44	Bechtel Plant Machinery, Inc.UEI MTKMVNVK1MH6	$6,492,350,171
45	Peraton Inc.UEI ZBPQEJVECCT4	$6,349,348,717
46	Barnard Construction Company, IncorporatedUEI LEGGW1TNMVC9	$6,347,772,346
47	General Atomics Aeronautical Systems, Inc.UEI ZH4NVFG3Z526	$6,232,269,392
48	Battelle Energy Alliance, LLCUEI HG7XL5RBNX55	$6,204,116,507
49	Honeywell Federal Manufacturing & Technologies, LLCUEI DMEGBYTVBQS5	$6,202,081,646
50	Lockheed Martin CorporationUEI KMEVRAKJVBD3	$6,115,003,016

Prime contractors and subcontractors

Every company on this government contractors list is a prime contractor: it holds contracts directly with federal agencies. Large prime contractors rarely do all the work themselves. They hire subcontractors for parts of a contract, and many are required to give a share of that subcontracted work to small businesses.

That makes the prime contractors list a practical lead list. Find the primes that win contracts in your industry, read their recent contract awards, and contact their small business liaison offices with your capability statement.

Largest government contractors by company (all registrations combined)

Government contractors by industry

Government contractors by agency

How the largest federal contractors are ranked

Companies are ranked by federal contract obligations (money committed on contracts) over the last three completed fiscal years, from USAspending.gov. Only contracts are counted, not grants or loans. Each registration (UEI) is ranked separately, so a large company can appear several times. See the methodology for details.

Government contractor terms

Prime contractor: A business that holds a contract directly with a government agency.
Subcontractor: A business hired by a prime contractor to do part of the work on a government contract. Subcontracting is a common first step into government work.
UEI (Unique Entity ID): A free 12-character ID that SAM.gov assigns to every registered business. It replaced the DUNS number in April 2022.
CAGE code: A five-character code that identifies a contractor's facility. US businesses get one during SAM.gov registration.
Capability statement: A one- or two-page summary of what your business does, its past performance and its codes, used to introduce your firm to agencies and prime contractors.
OSDBU: Office of Small and Disadvantaged Business Utilization: the office in most federal agencies that helps small businesses work with that agency.
Obligation: Money the government has legally committed to pay on a contract. Contract spending figures on this site are obligations reported on USAspending.gov.

Frequently asked questions

Who is the largest government contractor?: By federal contract dollars from FY2024 to FY2026, the largest government contractor registration was Optum Public Sector Solutions, Inc., with $65.1B in contract obligations. The next largest were Lockheed Martin Corporation and Electric Boat Corporation.
How do I become a government contractor?: Register your business for free in SAM.gov to get a Unique Entity ID (UEI), choose the NAICS codes for what you sell, and check which small business certifications you qualify for. Then search open government contracts on SAM.gov, or start as a subcontractor to one of the prime contractors on this list.
Why does the same company appear more than once?: Federal spending is reported per registration (UEI), and large companies often hold several: one per division, site or joint venture. Each registration has its own page with its own figures.
How can a small business work with large government contractors?: Most large prime contractors buy goods and services from small businesses as subcontractors, and many must meet small business subcontracting goals. Look at which agencies and industries a prime contractor works in, then contact its small business liaison office. You need a free SAM.gov registration to win federal work directly.
Where does this government contractor data come from?: Contract obligations come from USAspending.gov, the public record of federal spending. Figures cover contracts only (not grants or loans) from FY2024 to FY2026 and are refreshed weekly.