Top 100 Contractors in NAICS 81: Other Services (except Public Administration), FY2021

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	RTX Corporation 18 awardees, including Raytheon Company, Data Link Solutions LLC and Hornet Acquisitionco, LLC Top agencies MDA (DOD Missile Defense Agency) USAF (Department of the Air Force) DISA (Defense Information Systems Agency)	$500,716,262	10.8%	Rank history: #1 in FY2022, #1 in FY2023, #10 in FY2024 and #1 in FY2025; up 1 since FY2020.
2	Northrop Grumman Corporation 22 awardees, including Northrop Grumman Systems Corp Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DOT (Department of Transportation)	$191,967,809	4.2%	Rank history: #2 in FY2022, #6 in FY2023, #8 in FY2024 and #7 in FY2025; up 6 since FY2020.
3	Techflow, Inc. Top agencies DHS (Department of Homeland Security)	$188,480,090	4.1%	Rank history: #4 in FY2022, #4 in FY2023, #3 in FY2024 and #4 in FY2025; up 1 since FY2020.
4	Vectrus Systems Corporation Through V2X Systems LLC Top agencies Army (Department of the Army)	$160,496,650	3.5%	Rank history: #9 in FY2022, #9 in FY2023 and not on the FY2024–FY2025 lists; up 1 since FY2020.
5	Leidos Holdings, Inc. 3 awardees, including Leidos, Inc. Top agencies DHS (Department of Homeland Security) CSOSA (Court Services and Offender Supervision Agency) USDA (Department of Agriculture)	$160,369,020	3.5%	Rank history: #5 in FY2022, #7 in FY2023, #7 in FY2024 and #5 in FY2025; up 1 since FY2020.
6	General Dynamics Corporation 7 awardees, including General Dynamics Land Systems Inc., General Dynamics Information Technology, Inc. and General Dynamics Mission Systems, Inc. Top agencies Army (Department of the Army) DOT (Department of Transportation) Navy (Department of the Navy)	$151,497,943	3.3%	Rank history: #3 in FY2022, #2 in FY2023, #1 in FY2024 and #3 in FY2025; up 6 since FY2020.
7	Amentum Services, Inc. 3 awardees, including Dyncorp International LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$125,095,160	2.7%	Rank history: #21 in FY2022, #3 in FY2023, #2 in FY2024 and not on the FY2025 list; up 71 since FY2020.
8	The Boeing Company 8 awardees, including Digital Receiver Technology, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) Treasury (Department of the Treasury)	$89,148,588	1.9%	Rank history: #7 in FY2022, #10 in FY2023, #9 in FY2024 and #8 in FY2025; up 3 since FY2020.
9	Kbr, Inc. 2 awardees, including KBR Wyle Services, LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DOI (Department of the Interior)	$85,604,601	1.9%	Rank history: #10 in FY2022 and not on the FY2023–FY2025 lists; down 2 since FY2020.
10	L3Harris Technologies, Inc. 29 awardees, including Stellant Systems Inc. and L3 Technologies, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$81,291,769	1.8%	Rank history: #12 in FY2022, #11 in FY2023, #12 in FY2024 and #15 in FY2025; unchanged since FY2020.
11	Huntington Ingalls Industries, Inc. 5 awardees, including HII Mission Technologies Corp, Huntington Ingalls Inc. and HII Fleet Support Group LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$80,984,134	1.8%	Rank history: #11 in FY2022, #25 in FY2023, #21 in FY2024 and #11 in FY2025; down 2 since FY2020.
12	Lockheed Martin Corporation 13 awardees, including Lockheed Martin Coherent Technologies, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$61,104,052	1.3%	Rank history: #6 in FY2022, #8 in FY2023, #6 in FY2024 and #6 in FY2025; up 6 since FY2020.
13	Agiliti Health Inc. 3 awardees, including Northfield Medical Inc. Top agencies HHS (Department of Health and Human Services) Army (Department of the Army) USAF (Department of the Air Force)	$59,054,436	1.3%	Rank history: #8 in FY2022, #5 in FY2023, #4 in FY2024 and #17 in FY2025; down 12 since FY2020.
14	General Electric Company 17 awardees, including GE Aviation Systems LLC, General Electric International, Inc. and GE Medical Systems Information Technologies, Inc. Top agencies USSOCOM (United States Special Operations Command) USAF (Department of the Air Force) VA (Department of Veterans Affairs)	$54,340,410	1.2%	Rank history: #13 in FY2022, #15 in FY2023, #22 in FY2024 and #27 in FY2025; up 1 since FY2020.
15	Atec Inc. 3 awardees, including Vital Link, Inc. Top agencies USAF (Department of the Air Force)	$41,807,635	0.9%	Rank history: #16 in FY2022, #14 in FY2023, #23 in FY2024 and not on the FY2025 list; down 2 since FY2020.
16	Motorola Inc 4 awardees, including Motorola Solutions, Inc. and Motorola Solutions Connectivity, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$40,581,709	0.9%	Rank history: #15 in FY2022, #12 in FY2023, #29 in FY2024 and not on the FY2025 list; up 1 since FY2020.
17	Cartridge Technologies, LLC Top agencies DLA (Defense Logistics Agency) EPA (Environmental Protection Agency) SBA (Small Business Administration)	$34,692,604	0.8%	Rank history: #14 in FY2022, #16 in FY2023, #18 in FY2024 and #23 in FY2025; up 6 since FY2020.
18	Peckham Vocational Industries, Inc. Top agencies Army (Department of the Army)	$27,008,212	0.6%	Rank history: #24 in FY2022, #26 in FY2023, #19 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
19	Sonova Holding AG 2 awardees, including Sonova USA Inc. Top agencies VA (Department of Veterans Affairs)	$24,371,433	0.5%	Rank history: #22 in FY2022, #21 in FY2023, #20 in FY2024 and not on the FY2025 list; up 12 since FY2020.
20	OSI Systems Inc. 3 awardees, including American Science & Engineering Inc. and Spacelabs Healthcare LLC Top agencies DHS (Department of Homeland Security) WHS (DOD Washington Headquarters Service) Army (Department of the Army)	$20,203,921	0.4%	Rank history: #23 in FY2022, #17 in FY2023, #48 in FY2024 and not on the FY2025 list; unchanged since FY2020.
21	Sandhills Utility Services, LLC Top agencies Army (Department of the Army)	$19,022,657	0.4%	Rank history: #27 in FY2022, #23 in FY2023, #27 in FY2024 and #28 in FY2025; up 6 since FY2020.
22	Goldbelt, Incorporated 3 awardees, including Goldbelt Falcon LLC, Goldbelt C6, LLC and Goldbelt Security LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DHS (Department of Homeland Security)	$16,517,906	0.4%	Rank history: #38 in FY2022, #48 in FY2023, #51 in FY2024 and not on the FY2025 list; up 25 since FY2020.
23	Joint Commission On Accreditation of Healthcare Organizations Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) DHA (Defense Health Agency)	$16,367,727	0.4%	Rank history: #33 in FY2022, #35 in FY2023, #33 in FY2024 and #45 in FY2025; up 9 since FY2020.
24	Chenega It Enterprise Services, LLC Top agencies DHS (Department of Homeland Security)	$15,872,759	0.3%	Rank history: #48 in FY2022, #30 in FY2023, #34 in FY2024 and #55 in FY2025; new, not ranked in FY2020.
25	Goldbelt Frontier, LLC Top agencies Army (Department of the Army) DHA (Defense Health Agency)	$15,796,063	0.3%	Rank history: #30 in FY2022, #28 in FY2023, #24 in FY2024 and #31 in FY2025; up 8 since FY2020.
26	Calista Corp 4 awardees, including Yulista Support Services LLC, Y-Tech Services, Inc. and Tunista Services, LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$15,146,005	0.3%	Rank history: #34 in FY2022, #40 in FY2023 and not on the FY2024–FY2025 lists; up 9 since FY2020.
27	Varian Medical Systems, Inc. 4 awardees Top agencies VA (Department of Veterans Affairs) Army (Department of the Army) Navy (Department of the Navy)	$15,033,006	0.3%	Rank history: not on the FY2022–FY2025 lists; down 1 since FY2020.
28	Elbit Systems Ltd 2 awardees, including Elbitamerica, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$14,830,061	0.3%	Rank history: #29 in FY2022, #49 in FY2023 and not on the FY2024–FY2025 lists; up 39 since FY2020.
29	Thermo Electron Corporation 16 awardees, including Life Technologies Corporation, FEI Company and Thermo Electron North America LLC Top agencies HHS (Department of Health and Human Services) Navy (Department of the Navy) Commerce (Department of Commerce)	$14,535,947	0.3%	Rank history: #37 in FY2022, #43 in FY2023 and not on the FY2024–FY2025 lists; up 8 since FY2020.
30	Cargotec OYJ 3 awardees, including Independent Rough Terrain Center LLC, Macgregor USA Inc. and Rapp Marine U.s. Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency) Army (Department of the Army)	$14,194,126	0.3%	Rank history: #45 in FY2022, #29 in FY2023 and not on the FY2024–FY2025 lists; up 24 since FY2020.
31	Pergravis LLC Top agencies USAF (Department of the Air Force) USSOCOM (United States Special Operations Command) Army (Department of the Army)	$14,016,729	0.3%	Rank history: #31 in FY2022, #31 in FY2023, #38 in FY2024 and #37 in FY2025; down 1 since FY2020.
32	Honeywell International Inc. 17 awardees, including Honeywell Building Solutions SES Corp Top agencies USAF (Department of the Air Force) VA (Department of Veterans Affairs) Navy (Department of the Navy)	$13,932,585	0.3%	Rank history: #20 in FY2022, #33 in FY2023, not on the FY2024 list and #36 in FY2025; down 11 since FY2020.
33	Apro International, Inc. Top agencies USAF (Department of the Air Force)	$13,195,389	0.3%	Rank history: #44 in FY2022, #36 in FY2023, #32 in FY2024 and #39 in FY2025; down 4 since FY2020.
34	American Engineering Corporation Top agencies DODEA (Department of Defense Education Activity) Navy (Department of the Navy) Army (Department of the Army)	$12,667,828	0.3%	Rank history: #36 in FY2022, #34 in FY2023 and not on the FY2024–FY2025 lists; up 10 since FY2020.
35	Danaher Corporation 20 awardees, including Leica Microsystems Inc., Beckman Coulter, Inc. and AB Sciex LLC Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs) Navy (Department of the Navy)	$12,329,080	0.3%	Rank history: #41 in FY2022, #41 in FY2023, #41 in FY2024 and #41 in FY2025; up 17 since FY2020.
36	JC Technology Inc. Top agencies USAF (Department of the Air Force) HHS (Department of Health and Human Services) Navy (Department of the Navy)	$12,194,222	0.3%	Rank history: not on the FY2022–FY2025 lists; up 12 since FY2020.
37	Siemens Aktiengesellschaft 14 awardees, including Siemens Medical Solutions Usa, Inc., Siemens Industry Inc. and Varian Medical Systems, Inc. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) DOT (Department of Transportation)	$12,032,766	0.3%	Rank history: #25 in FY2022, #24 in FY2023, #54 in FY2024 and not on the FY2025 list; up 36 since FY2020.
38	Venturehouse Group LLC Through Vsgi Solutionz, LLC Top agencies GSA (General Services Administration) DOJ (Department of Justice) DOT (Department of Transportation)	$12,012,828	0.3%	Rank history: not on the FY2022–FY2025 lists; up 20 since FY2020.
39	M1 Support Services, L.P. Top agencies USAF (Department of the Air Force)	$11,993,465	0.3%	Rank history: #42 in FY2022 and not on the FY2023–FY2025 lists; unchanged since FY2020.
40	Air New Zealand Engineering Services Top agencies Navy (Department of the Navy)	$11,704,511	0.3%	Rank history: #51 in FY2022, #99 in FY2023 and not on the FY2024–FY2025 lists; up 5 since FY2020.
41	General Dynamics Satcom Technologies Inc. 6 awardees, including CPI Electron Device Business, Inc., Microwave Power Products, Inc. and Communications & Power Industries Canada Inc. Top agencies USAF (Department of the Air Force) DOT (Department of Transportation) Navy (Department of the Navy)	$11,301,156	0.2%	Rank history: #55 in FY2022, #62 in FY2023, #100 in FY2024 and not on the FY2025 list; up 39 since FY2020.
42	West Virginia Medical Institute Inc. Through Quality Insights, Inc. Top agencies VA (Department of Veterans Affairs)	$10,900,744	0.2%	Rank history: #57 in FY2022, #61 in FY2023 and not on the FY2024–FY2025 lists; up 42 since FY2020.
43	BAE Systems PLC 12 awardees, including BAE Systems Information and Electronic Systems Integration Inc., BAE Systems Technology Solutions & Services Inc. and BAE Systems (Operations) Limited Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$10,710,688	0.2%	Rank history: #49 in FY2022, #22 in FY2023, #37 in FY2024 and #30 in FY2025; up 7 since FY2020.
44	Taylor Defense Products, LLC Top agencies Navy (Department of the Navy)	$10,701,475	0.2%	Rank history: #35 in FY2022 and not on the FY2023–FY2025 lists; down 16 since FY2020.
45	Intific Inc 2 awardees, including Cubic Defense Applications, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$10,644,754	0.2%	Rank history: not on the FY2022–FY2025 lists; up 25 since FY2020.
46	Saab AB 2 awardees, including Saab, Inc. Top agencies Navy (Department of the Navy) DOS (Department of State) DOT (Department of Transportation)	$9,481,305	0.2%	Rank history: #28 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
47	Epsilon Systems Solutions, Inc. Top agencies Navy (Department of the Navy)	$9,020,640	0.2%	Rank history: #73 in FY2022 and not on the FY2023–FY2025 lists; up 34 since FY2020.
48	Centerpoint Energy, Inc. Through Energy Systems Group, LLC Top agencies Army (Department of the Army)	$8,651,809	0.2%	Rank history: #81 in FY2022 and not on the FY2023–FY2025 lists; up 13 since FY2020.
49	Stellant Systems Inc. Top agencies USAF (Department of the Air Force)	$8,475,738	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
50	Becton, Dickinson and Co 7 awardees, including Carefusion Solutions, LLC, Carefusion 2200 Inc. and GSL Solutions Inc. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) DHA (Defense Health Agency)	$8,308,486	0.2%	Rank history: #56 in FY2022, #46 in FY2023, #31 in FY2024 and #24 in FY2025; up 81 since FY2020.
51	Pollock Research & Design, Inc. 2 awardees, including Advanced Crane Technologies LLC Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$8,001,297	0.2%	Rank history: not on the FY2022–FY2025 lists; up 25 since FY2020.
52	9W Halo Holdings L.P. 7 awardees, including 9W Halo Opco L.P. and 9W Halo Western Opco L.P. Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$7,978,035	0.2%	Rank history: #62 in FY2022 and not on the FY2023–FY2025 lists; up 10 since FY2020.
53	Starkey Laboratories Inc. Top agencies VA (Department of Veterans Affairs)	$7,971,378	0.2%	Rank history: #65 in FY2022, #45 in FY2023, #58 in FY2024 and #89 in FY2025; up 11 since FY2020.
54	GN Store Nord A/S Through GN Hearing Care Corporation Top agencies VA (Department of Veterans Affairs)	$7,957,416	0.2%	Rank history: #52 in FY2022, #58 in FY2023 and not on the FY2024–FY2025 lists; down 13 since FY2020.
55	IAP Global Services LLC Through IAP Worldwide Services, Inc. Top agencies Army (Department of the Army)	$7,775,223	0.2%	Rank history: not on the FY2022–FY2025 lists; up 11 since FY2020.
56	Sinew Management Group LLC Top agencies DISA (Defense Information Systems Agency) WHS (DOD Washington Headquarters Service)	$7,736,710	0.2%	Rank history: #96 in FY2022, #72 in FY2023 and not on the FY2024–FY2025 lists; up 19 since FY2020.
57	Teledyne Technologies Incorporated 16 awardees, including Teledyne Flir Defense, LLC, Teledyne Brown Engineering, Inc. and Teledyne Defense Electronics, LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DOT (Department of Transportation)	$7,388,603	0.2%	Rank history: #46 in FY2022, #53 in FY2023, not on the FY2024 list and #95 in FY2025; up 236 since FY2020.
58	Steris Corporation 6 awardees, including Steris Instrument Management Services, Inc., Medivators Inc. and Evoqua Water Technologies LLC Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$7,378,574	0.2%	Rank history: #50 in FY2022, #56 in FY2023 and not on the FY2024–FY2025 lists; up 92 since FY2020.
59	Arlington Capital Partners IV, L.P. 2 awardees, including Tyto Athene, LLC and Mutual Telecom Services Inc. Top agencies Navy (Department of the Navy) DISA (Defense Information Systems Agency) USAF (Department of the Air Force)	$7,355,466	0.2%	Rank history: #84 in FY2022, #74 in FY2023 and not on the FY2024–FY2025 lists; up 12 since FY2020.
60	Stryker Corporation 11 awardees, including Stryker Sales, LLC, Stryker Communications Inc. and Howmedica Osteonics Corp Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) Army (Department of the Army)	$7,345,249	0.2%	Rank history: #61 in FY2022, #63 in FY2023, #73 in FY2024 and not on the FY2025 list; up 83 since FY2020.
61	Olympus America Inc 5 awardees, including Olympus Latin America, Inc. Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force) DHA (Defense Health Agency)	$7,167,593	0.2%	Rank history: #87 in FY2022, #59 in FY2023 and not on the FY2024–FY2025 lists; up 94 since FY2020.
62	Serco North America (Holdings) Inc 2 awardees, including Brtrc Federal Solutions, Inc. and Serco Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$7,071,888	0.2%	Rank history: #66 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
63	Veteran Corps of America Top agencies Army (Department of the Army)	$6,829,965	0.1%	Rank history: not on the FY2022–FY2025 lists; down 29 since FY2020.
64	Smiths Group PLC 3 awardees, including Smiths Detection Inc. Top agencies DHS (Department of Homeland Security) AOUSC (Administrative Office of the U.S. Courts) USDA (Department of Agriculture)	$6,779,985	0.1%	Rank history: #47 in FY2022, #42 in FY2023 and not on the FY2024–FY2025 lists; down 11 since FY2020.
65	Viasat Inc. 2 awardees Top agencies Navy (Department of the Navy) DOI (Department of the Interior)	$6,666,461	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
66	Raytheon Company Top agencies MDA (DOD Missile Defense Agency)	$6,646,860	0.1%	Rank history: not on the FY2022–FY2023 lists, #5 in FY2024 and #16 in FY2025; down 44 since FY2020.
67	William Demants OG Hustru IDA Emilies (MILLAS) Fond - Kaldet 7 awardees, including Oticon, Inc., E3 Diagnostics, Inc. and Med-Acoustics, Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) Army (Department of the Army)	$6,567,479	0.1%	Rank history: #63 in FY2022, #57 in FY2023 and not on the FY2024–FY2025 lists; up 42 since FY2020.
68	Parata Systems LLC Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$6,394,825	0.1%	Rank history: #89 in FY2022 and not on the FY2023–FY2025 lists; down 25 since FY2020.
69	J Star Enterprises Inc. Top agencies Army (Department of the Army)	$6,391,030	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
70	Lakota Solutions LLC Top agencies Army (Department of the Army) DLA (Defense Logistics Agency) USAF (Department of the Air Force)	$6,316,162	0.1%	Rank history: #54 in FY2022, #55 in FY2023, #56 in FY2024 and not on the FY2025 list; up 12 since FY2020.
71	Rolls-Royce Military Aero Engines Ltd 4 awardees, including Rolls-Royce Solutions America Inc., Rolls-Royce Corporation and Rolls-Royce Marine North America Inc. Top agencies Navy (Department of the Navy)	$6,286,978	0.1%	Rank history: not on the FY2022 list, #80 in FY2023 and not on the FY2024–FY2025 lists; down 25 since FY2020.
72	SFS Global / Tiburon JV Top agencies Army (Department of the Army) Navy (Department of the Navy)	$6,214,914	0.1%	Rank history: #98 in FY2022 and not on the FY2023–FY2025 lists; up 87 since FY2020.
73	Hatalom Corp Top agencies Navy (Department of the Navy)	$6,120,994	0.1%	Rank history: #60 in FY2022, #65 in FY2023, #60 in FY2024 and #74 in FY2025; new, not ranked in FY2020.
74	Korea Housing Management Co. Ltd. Top agencies Army (Department of the Army)	$6,097,391	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
75	In & Out Valet Co Top agencies VA (Department of Veterans Affairs)	$5,957,633	0.1%	Rank history: #72 in FY2022 and not on the FY2023–FY2025 lists; up 13 since FY2020.
76	American Biomedical Group Inc. Top agencies HHS (Department of Health and Human Services) DHA (Defense Health Agency)	$5,877,577	0.1%	Rank history: #80 in FY2022 and not on the FY2023–FY2025 lists; up 3 since FY2020.
77	XL Associates, Inc. Top agencies USAID (US Agency for International Development)	$5,741,513	0.1%	Rank history: not on the FY2022–FY2025 lists; down 12 since FY2020.
78	Draeger Inc. 2 awardees, including Draeger Japan Ltd. Top agencies VA (Department of Veterans Affairs) Navy (Department of the Navy) Army (Department of the Army)	$5,668,550	0.1%	Rank history: #95 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
79	Louise W. Eggleston Center, Inc. Top agencies DHA (Defense Health Agency) USAF (Department of the Air Force) Navy (Department of the Navy)	$5,636,707	0.1%	Rank history: #99 in FY2022, #82 in FY2023 and not on the FY2024–FY2025 lists; up 44 since FY2020.
80	Job Options, Incorporated Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$5,625,288	0.1%	Rank history: #78 in FY2022, #70 in FY2023, #68 in FY2024 and #60 in FY2025; up 32 since FY2020.
81	Agilent Technologies, Inc. 9 awardees, including Biotek Instruments, Inc., Agilent Technologies Japan, Ltd. and Keysight Technologies, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) HHS (Department of Health and Human Services)	$5,615,172	0.1%	Rank history: #70 in FY2022, #93 in FY2023 and not on the FY2024–FY2025 lists; up 10 since FY2020.
82	The Winvale Group, LLC Top agencies USDA (Department of Agriculture) HHS (Department of Health and Human Services) USAF (Department of the Air Force)	$5,591,602	0.1%	Rank history: #86 in FY2022, #90 in FY2023 and not on the FY2024–FY2025 lists; up 92 since FY2020.
83	Mechanical Resources Incorporated Top agencies Navy (Department of the Navy) OSD (Office of the Secretary of Defense)	$5,480,563	0.1%	Rank history: #67 in FY2022, not on the FY2023 list, #76 in FY2024 and #67 in FY2025; up 4 since FY2020.
84	Eaton Corporation 7 awardees, including Eaton Aerospace LLC and Eaton Industries (Italy) S.R.L. Top agencies DOT (Department of Transportation) Army (Department of the Army) Navy (Department of the Navy)	$5,386,432	0.1%	Rank history: #58 in FY2022, #44 in FY2023 and not on the FY2024–FY2025 lists; down 21 since FY2020.
85	Bell and Howell LLC Top agencies Treasury (Department of the Treasury) Commerce (Department of Commerce)	$5,303,977	0.1%	Rank history: #90 in FY2022, #97 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
86	Ametek Inc. 16 awardees, including Nsi-Mi Technologies Inc., Spectro Scientific, Inc. and Cameca Instruments, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) HHS (Department of Health and Human Services)	$5,255,970	0.1%	Rank history: not on the FY2022–FY2025 lists; up 117 since FY2020.
87	Illumina, Inc. Top agencies HHS (Department of Health and Human Services) NASA (National Aeronautics and Space Administration) VA (Department of Veterans Affairs)	$5,190,809	0.1%	Rank history: #83 in FY2022, not on the FY2023 list, #99 in FY2024 and not on the FY2025 list; up 27 since FY2020.
88	Healthcare Asset Network Inc. Top agencies VA (Department of Veterans Affairs)	$5,099,931	0.1%	Rank history: not on the FY2022–FY2025 lists; down 33 since FY2020.
89	State of California Controllers Office 6 awardees, including Civil Rights Department, Regents of the University of California and State of California Department of Water Resources Top agencies EEOC (Equal Employment Opportunity Commission) VA (Department of Veterans Affairs) DOI (Department of the Interior)	$5,068,242	0.1%	Rank history: not on the FY2022–FY2025 lists; up 35 since FY2020.
90	Pact, Inc. Top agencies USAID (US Agency for International Development)	$5,000,000	0.1%	Rank history: not on the FY2022–FY2025 lists; up 40 since FY2020.
91	Knot Technology Solutions, L.L.C. Top agencies DOJ (Department of Justice) DFAS (Defense Finance and Accounting Service) SSA (Social Security Administration)	$4,973,529	0.1%	Rank history: not on the FY2022–FY2025 lists; up 279 since FY2020.
92	Alliance Worldwide Distributing LLC Top agencies Navy (Department of the Navy) Army (Department of the Army) DECA (Defense Commissary Agency)	$4,971,149	0.1%	Rank history: not on the FY2022–FY2025 lists; up 37 since FY2020.
93	Varex Imaging Corp Top agencies DHS (Department of Homeland Security)	$4,926,381	0.1%	Rank history: not on the FY2022–FY2025 lists; up 10 since FY2020.
94	Unifirst Corporation 33 awardees, including Unitech Services Group, Inc. and UNI First Corp Top agencies DOE (Department of Energy) Army (Department of the Army) Treasury (Department of the Treasury)	$4,921,922	0.1%	Rank history: #79 in FY2022, #95 in FY2023 and not on the FY2024–FY2025 lists; up 91 since FY2020.
95	The Bionetics Corp Top agencies DOT (Department of Transportation) HHS (Department of Health and Human Services)	$4,839,397	0.1%	Rank history: #85 in FY2022 and not on the FY2023–FY2025 lists; down 27 since FY2020.
96	R. S. Means Company LLC 8 awardees, including Advanced Sterilization Products Services Inc., Tektronix, Inc. and Fluke Electronics Corp Top agencies VA (Department of Veterans Affairs) Commerce (Department of Commerce) Navy (Department of the Navy)	$4,838,151	0.1%	Rank history: #82 in FY2022, #67 in FY2023 and not on the FY2024–FY2025 lists; up 4 since FY2020.
97	Barragan Corp. International Top agencies Navy (Department of the Navy)	$4,813,248	0.1%	Rank history: not on the FY2022–FY2025 lists; up 21 since FY2020.
98	Hewlett Packard Enterprise Co 3 awardees, including HP, Inc. Top agencies HHS (Department of Health and Human Services) DHS (Department of Homeland Security) Army (Department of the Army)	$4,702,045	0.1%	Rank history: not on the FY2022–FY2025 lists; up 168 since FY2020.
99	Clear Align LLC Top agencies DOT (Department of Transportation) USAF (Department of the Air Force)	$4,660,095	0.1%	Rank history: not on the FY2022–FY2025 lists; up 141 since FY2020.
100	Merchants Automotive Group, LLC Top agencies DOJ (Department of Justice)	$4,642,384	0.1%	Rank history: #94 in FY2022, #47 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.

Rankings for the codes under NAICS 81

How this ranking works

• Source: every contract action FPDS records (as published on SAM.gov) in the period, as GovTribe received it.
• Amounts are net obligations: what was obligated, less what was deobligated. Shares are of $4.63 billion obligated before deobligations, so they never pass 100%.
• Parent companies: each action counts under the ultimate parent its award record names, or under the awardee when it names none, so no dollar counts twice. Parents of the same name (Inc., LLC and the like aside) count as one company, since FPDS records a company's parent under more than one UEI over time. GovTribe corrects a few parents and names by hand; see the corrections.
• Fiscal year 2021 ran Oct 1, 2020 – Sep 30, 2021. The Department of Defense reports its contract actions to FPDS about 90 days late, so a fiscal year is ranked once they're in, in February, and the list doesn't change after.
• Rank changes compare with FY2020. "New" marks a company outside that period's top 500, and "Returned" one of those that was on an earlier fiscal year's list.
• Rank lines show each company's rank on every fiscal year's list since FY2021, #1 at the top, on a scale that gives the top of the list more room. A dashed stretch spans years it wasn't on the list. The step from FY2020 takes the color of the rank change beside it.
• Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

Quick answers