Top 100 Contractors in PSC R499: Other Professional Services, Aug 2025–Jul 2026

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	The Boeing Company 7 awardees, including Boeing Sikorsky Aircraft Support, LLC and Jeppesen Foreflight, Inc. Top agencies USAF (Department of the Air Force) USSOCOM (United States Special Operations Command) Navy (Department of the Navy)	$2,383,352,984	8.1%	Rank history: #2 in FY2021, #2 in FY2022, #2 in FY2023, #2 in FY2024 and #1 in FY2025; up 1 since Aug 2024–Jul 2025.
2	Booz Allen Hamilton Holding Corporation 5 awardees, including Booz Allen Hamilton Inc., Thunderyard Solutions LLC and IAN Evan & Alexander Corp Top agencies Army (Department of the Army) OSD (Office of the Secretary of Defense) USAF (Department of the Air Force)	$1,874,618,961	6.4%	Rank history: #1 in FY2021, #1 in FY2022, #1 in FY2023, #1 in FY2024 and #2 in FY2025; down 1 since Aug 2024–Jul 2025.
3	Govcio, LLC 3 awardees, including Salient Crgt, Inc. and Soldierpoint Digital Health, LLC Top agencies USAF (Department of the Air Force) VA (Department of Veterans Affairs) PBGC (Pension Benefit Guaranty Corporation)	$915,418,720	3.1%	Rank history: not on the FY2021 list, #36 in FY2022, #62 in FY2023, #60 in FY2024 and #10 in FY2025; up 49 since Aug 2024–Jul 2025.
4	Savannah River Mission Completion, LLC Top agencies DOE (Department of Energy)	$914,414,089	3.1%	Rank history: not on the FY2021 list, #4 in FY2022, #4 in FY2023, #5 in FY2024 and #3 in FY2025; down 1 since Aug 2024–Jul 2025.
5	Huntington Ingalls Industries, Inc. 3 awardees, including HII Mission Technologies Corp and Universal Field Services Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) OSD (Office of the Secretary of Defense)	$840,913,544	2.9%	Rank history: #89 in FY2021, #18 in FY2022, #10 in FY2023, #8 in FY2024 and #7 in FY2025; up 2 since Aug 2024–Jul 2025.
6	Deloitte 3 awardees, including Deloitte Consulting LLP and Deloitte & Touche LLP Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) HHS (Department of Health and Human Services)	$819,964,806	2.8%	Rank history: not on the FY2021–FY2023 lists, #7 in FY2024 and #6 in FY2025; unchanged since Aug 2024–Jul 2025.
7	General Dynamics Corporation 7 awardees, including General Dynamics Information Technology, Inc., General Dynamics Land Systems Inc. and General Dynamics One Source LLC Top agencies Army (Department of the Army) HHS (Department of Health and Human Services) USAF (Department of the Air Force)	$816,227,101	2.8%	Rank history: #6 in FY2021, #11 in FY2022, #5 in FY2023, #3 in FY2024 and #5 in FY2025; down 3 since Aug 2024–Jul 2025.
8	Maximus Federal Services, Inc. Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$810,566,920	2.8%	Rank history: not on the FY2021–FY2023 lists, #6 in FY2024 and #4 in FY2025; down 3 since Aug 2024–Jul 2025.
9	Science Applications International Corporation Top agencies Army (Department of the Army) USAF (Department of the Air Force) WHS (DOD Washington Headquarters Service)	$786,986,927	2.7%	Rank history: #11 in FY2021, #7 in FY2022, #6 in FY2023, #9 in FY2024 and #8 in FY2025; up 1 since Aug 2024–Jul 2025.
10	Guidehouse Inc. 13 awardees, including Peraton Inc., Peraton Enterprise Solutions LLC and Peraton Technology Services Inc. Top agencies DOS (Department of State) USAF (Department of the Air Force) HHS (Department of Health and Human Services)	$612,708,564	2.1%	Rank history: not on the FY2021–FY2023 lists, #12 in FY2024 and #15 in FY2025; up 20 since Aug 2024–Jul 2025.
11	V2X, Inc. 2 awardees, including V2X Aerospace LLC and V2X Systems LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$512,658,909	1.7%	Rank history: not on the FY2021–FY2024 lists and #13 in FY2025; up 5 since Aug 2024–Jul 2025.
12	Leidos Holdings, Inc. 10 awardees, including Leidos, Inc., Hanford Mission Integration Solutions, LLC and 1901 Group, LLC Top agencies Army (Department of the Army) DOE (Department of Energy) USAF (Department of the Air Force)	$502,819,518	1.7%	Rank history: #62 in FY2021, #54 in FY2022, #20 in FY2023, #13 in FY2024 and #12 in FY2025; unchanged since Aug 2024–Jul 2025.
13	CACI International Inc. 7 awardees, including Caci Nss, LLC, Caci, Inc. - Federal and Caci, LLC - Commercial Top agencies Army (Department of the Army) USDA (Department of Agriculture) DTRA (Defense Threat Reduction Agency)	$400,265,370	1.4%	Rank history: #8 in FY2021, #6 in FY2022, #8 in FY2023, #10 in FY2024 and #9 in FY2025; down 4 since Aug 2024–Jul 2025.
14	LMI Consulting, LLC Top agencies DHS (Department of Homeland Security) HHS (Department of Health and Human Services) OSD (Office of the Secretary of Defense)	$353,155,164	1.2%	Rank history: not on the FY2021 list, #26 in FY2022, #25 in FY2023, #20 in FY2024 and #22 in FY2025; up 5 since Aug 2024–Jul 2025.
15	Peraton Inc. 3 awardees, including Safeguard Services LLC and Peraton Enterprise Solutions LLC Top agencies DOT (Department of Transportation) HHS (Department of Health and Human Services) Army (Department of the Army)	$317,649,177	1.1%	Rank history: not on the FY2021–FY2023 lists, #16 in FY2024 and #11 in FY2025; down 4 since Aug 2024–Jul 2025.
16	Accenture Federal Services LLC 5 awardees, including Cognosante MVH LLC and Cognosante, LLC Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) Commerce (Department of Commerce)	$314,708,915	1.1%	Rank history: not on the FY2021–FY2023 lists, #19 in FY2024 and #14 in FY2025; down 2 since Aug 2024–Jul 2025.
17	Amentum Holdings, Inc. 8 awardees, including Amentum Services, Inc., Amentum Technology, Inc. and Dyncorp International LLC Top agencies DHS (Department of Homeland Security) USAF (Department of the Air Force) Navy (Department of the Navy)	$286,823,235	1.0%	Rank history: not on the FY2021–FY2023 lists, #85 in FY2024 and #23 in FY2025; up 3 since Aug 2024–Jul 2025.
18	Lockheed Martin Corporation 8 awardees, including Lockheed Martin Services, LLC Top agencies USAF (Department of the Air Force)	$256,013,261	0.9%	Rank history: #46 in FY2021, #30 in FY2022, #47 in FY2023, #38 in FY2024 and #46 in FY2025; up 33 since Aug 2024–Jul 2025.
19	Serco Inc Top agencies HHS (Department of Health and Human Services) PBGC (Pension Benefit Guaranty Corporation) Navy (Department of the Navy)	$253,971,626	0.9%	Rank history: not on the FY2021–FY2023 lists, #17 in FY2024 and #18 in FY2025; down 4 since Aug 2024–Jul 2025.
20	Clark Construction LLC Through Clark Construction Group LLC Top agencies Army (Department of the Army)	$212,884,061	0.7%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
21	Systems Planning and Analysis, Inc. 4 awardees, including Schafer Government Services, LLC, Prkk LLC and Group W Inc. Top agencies DARPA (Defense Advanced Research Projects Agency) OSD (Office of the Secretary of Defense) USAF (Department of the Air Force)	$211,373,797	0.7%	Rank history: #94 in FY2021, #83 in FY2022, #86 in FY2023, not on the FY2024 list and #28 in FY2025; up 88 since Aug 2024–Jul 2025.
22	Family Health International Top agencies USAID (US Agency for International Development) HHS (Department of Health and Human Services)	$202,770,388	0.7%	Rank history: not on the FY2021–FY2024 lists and #20 in FY2025; up 42 since Aug 2024–Jul 2025.
23	ManTech International Corporation 4 awardees, including Mantech Advanced Systems International, Inc., Unison Software Inc. and Unison Cost Engineering LLC Top agencies USCYBERCOM (Department of Defense Cyber Command) OSD (Office of the Secretary of Defense) USAF (Department of the Air Force)	$198,320,325	0.7%	Rank history: not on the FY2021–FY2024 lists and #34 in FY2025; up 19 since Aug 2024–Jul 2025.
24	BCG Federal Corp. Top agencies DHA (Defense Health Agency) USAF (Department of the Air Force) Navy (Department of the Navy)	$196,087,384	0.7%	Rank history: not on the FY2021–FY2023 lists, #32 in FY2024 and not on the FY2025 list; down 3 since Aug 2024–Jul 2025.
25	Carahsoft Technology Corp Top agencies HHS (Department of Health and Human Services) DOE (Department of Energy) Navy (Department of the Navy)	$193,548,038	0.7%	Rank history: not on the FY2021–FY2022 lists, #51 in FY2023, #22 in FY2024 and #33 in FY2025; up 11 since Aug 2024–Jul 2025.
26	Parsons Corporation 4 awardees, including Parsons Government Services Inc., Ptsi Managed Services Inc. and Xator LLC Top agencies OSD (Office of the Secretary of Defense) USAF (Department of the Air Force) DTRA (Defense Threat Reduction Agency)	$183,937,150	0.6%	Rank history: #17 in FY2021, #17 in FY2022, #12 in FY2023, #15 in FY2024 and #21 in FY2025; down 8 since Aug 2024–Jul 2025.
27	The Chenega Corporation 21 awardees, including C2 Alaska, LLC, Chenega Global Protection, LLC and Chenega Enterprise Systems & Solutions, LLC Top agencies NASA (National Aeronautics and Space Administration) HHS (Department of Health and Human Services) SEC (Securities and Exchange Commission)	$151,142,708	0.5%	Rank history: #67 in FY2021, #69 in FY2022, #58 in FY2023, not on the FY2024 list and #24 in FY2025; new, not ranked in Aug 2024–Jul 2025.
28	Koniag, Inc. 14 awardees, including Kadiak LLC, Koniag Data Solutions LLC and Koniag Professional Services, LLC Top agencies HHS (Department of Health and Human Services) DHS (Department of Homeland Security) Army (Department of the Army)	$147,861,391	0.5%	Rank history: #79 in FY2021, #55 in FY2022, #53 in FY2023, not on the FY2024 list and #36 in FY2025; up 87 since Aug 2024–Jul 2025.
29	Research Triangle Institute Top agencies HHS (Department of Health and Human Services) DOJ (Department of Justice) ED (Department of Education)	$124,103,982	0.4%	Rank history: #20 in FY2021, #28 in FY2022, #26 in FY2023, #18 in FY2024 and #42 in FY2025; down 4 since Aug 2024–Jul 2025.
30	Signature Choice II, LLC Top agencies VA (Department of Veterans Affairs)	$122,641,074	0.4%	Rank history: not on the FY2021–FY2023 lists, #25 in FY2024 and not on the FY2025 list; up 51 since Aug 2024–Jul 2025.
31	International Business Machines Corporation 4 awardees Top agencies USAF (Department of the Air Force) DHS (Department of Homeland Security) VA (Department of Veterans Affairs)	$120,773,495	0.4%	Rank history: #30 in FY2021, #16 in FY2022, #30 in FY2023, #30 in FY2024 and #30 in FY2025; down 2 since Aug 2024–Jul 2025.
32	Cherokee Nation 14 awardees, including Cherokee Nation Strategic Programs, L.L.C., Cherokee Insights LLC and Criterion Systems, L.L.C. Top agencies USAF (Department of the Air Force) DHA (Defense Health Agency) DOE (Department of Energy)	$115,291,080	0.4%	Rank history: #63 in FY2021, #64 in FY2022, not on the FY2023–FY2024 lists and #27 in FY2025; new, not ranked in Aug 2024–Jul 2025.
33	Kbr, Inc. 5 awardees, including KBR Wyle Services, LLC and Linquest Corporation Top agencies NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force) Army (Department of the Army)	$113,293,237	0.4%	Rank history: #29 in FY2021, #33 in FY2022, #37 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
34	Apogee Engineering, LLC Top agencies USSOCOM (United States Special Operations Command) USAF (Department of the Air Force) OSD (Office of the Secretary of Defense)	$111,655,367	0.4%	Rank history: #56 in FY2021, #71 in FY2022, not on the FY2023 list, #77 in FY2024 and #50 in FY2025; up 20 since Aug 2024–Jul 2025.
35	RTX Corporation 15 awardees, including Raytheon Company and Goodrich Corporation Top agencies USAF (Department of the Air Force) Commerce (Department of Commerce) WHS (DOD Washington Headquarters Service)	$105,600,840	0.4%	Rank history: #12 in FY2021, #43 in FY2022, #31 in FY2023, #33 in FY2024 and #31 in FY2025; down 3 since Aug 2024–Jul 2025.
36	Tetra Tech, Inc. 11 awardees, including Halvik LLC, Bluewater Federal Solutions, Inc. and LS Technologies LLC Top agencies NASA (National Aeronautics and Space Administration) USSOCOM (United States Special Operations Command) DOE (Department of Energy)	$96,850,054	0.3%	Rank history: #39 in FY2021, #27 in FY2022, #36 in FY2023, #36 in FY2024 and #29 in FY2025; down 2 since Aug 2024–Jul 2025.
37	Arctic Slope Regional Corporation 13 awardees, including Agile Decision Sciences, LLC, Broadleaf, Inc. and Asrc Federal Technology Solutions, LLC Top agencies NASA (National Aeronautics and Space Administration) Army (Department of the Army) Commerce (Department of Commerce)	$96,038,545	0.3%	Rank history: not on the FY2021–FY2023 lists, #42 in FY2024 and #40 in FY2025; up 10 since Aug 2024–Jul 2025.
38	Qlarant Integrity Solutions LLC Top agencies HHS (Department of Health and Human Services)	$95,064,638	0.3%	Rank history: not on the FY2021–FY2024 lists and #41 in FY2025; up 3 since Aug 2024–Jul 2025.
39	The Timken Company 2 awardees, including CGI Federal Inc. and Sehlke Consulting LLC Top agencies Navy (Department of the Navy) DOS (Department of State) DOI (Department of the Interior)	$94,548,946	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
40	Kpmg LLP Top agencies HHS (Department of Health and Human Services) DOS (Department of State) USAF (Department of the Air Force)	$92,930,856	0.3%	Rank history: not on the FY2021–FY2023 lists, #41 in FY2024 and #61 in FY2025; up 6 since Aug 2024–Jul 2025.
41	Kelly Services, Inc. Top agencies HHS (Department of Health and Human Services)	$87,046,768	0.3%	Rank history: not on the FY2021–FY2023 lists, #39 in FY2024 and #37 in FY2025; down 4 since Aug 2024–Jul 2025.
42	KBR Wyle Services LLC 4 awardees Top agencies NASA (National Aeronautics and Space Administration) Navy (Department of the Navy) DOI (Department of the Interior)	$86,338,106	0.3%	Rank history: not on the FY2021–FY2023 lists, #29 in FY2024 and #25 in FY2025; down 18 since Aug 2024–Jul 2025.
43	Axle Informatics, LLC Top agencies HHS (Department of Health and Human Services)	$85,437,434	0.3%	Rank history: #64 in FY2021, #46 in FY2022, #39 in FY2023, #47 in FY2024 and #39 in FY2025; down 10 since Aug 2024–Jul 2025.
44	ICF International Inc. 4 awardees, including ICF Incorporated, L.L.C. Top agencies HHS (Department of Health and Human Services) NSF (National Science Foundation) USAF (Department of the Air Force)	$83,700,609	0.3%	Rank history: not on the FY2021–FY2023 lists, #50 in FY2024 and #49 in FY2025; down 1 since Aug 2024–Jul 2025.
45	The GEO Group, Inc. Top agencies DOJ (Department of Justice)	$83,307,469	0.3%	Rank history: #34 in FY2021, #32 in FY2022, #38 in FY2023, #49 in FY2024 and #44 in FY2025; down 1 since Aug 2024–Jul 2025.
46	Asgn Incorporated 2 awardees, including ECS Federal, LLC and Sewp Solutions LLC Top agencies DARPA (Defense Advanced Research Projects Agency) HHS (Department of Health and Human Services) USAF (Department of the Air Force)	$82,926,478	0.3%	Rank history: not on the FY2021–FY2024 lists and #47 in FY2025; up 11 since Aug 2024–Jul 2025.
47	Bristol Bay Native Corporation 16 awardees, including Eagle Integrated Services, LLC, Tekpro Support Services, LLC and Aerostar SES LLC Top agencies USAF (Department of the Air Force) DHA (Defense Health Agency) Army (Department of the Army)	$82,864,106	0.3%	Rank history: not on the FY2021–FY2024 lists and #45 in FY2025; new, not ranked in Aug 2024–Jul 2025.
48	E.f. Kearney, Limited 2 awardees, including Kearney & Company, P.C. Top agencies USAF (Department of the Air Force) GSA (General Services Administration) VA (Department of Veterans Affairs)	$77,358,804	0.3%	Rank history: not on the FY2021–FY2023 lists, #69 in FY2024 and not on the FY2025 list; up 2 since Aug 2024–Jul 2025.
49	Nana Regional Corporation, Inc. 11 awardees, including Rivertech LLC, Systems Intelligence, LLC and Akima Systems Engineering LLC Top agencies DHS (Department of Homeland Security) Army (Department of the Army) USAF (Department of the Air Force)	$76,737,134	0.3%	Rank history: not on the FY2021–FY2024 lists and #56 in FY2025; new, not ranked in Aug 2024–Jul 2025.
50	Strategic Analysis, Inc. Top agencies DARPA (Defense Advanced Research Projects Agency) WHS (DOD Washington Headquarters Service)	$72,100,456	0.2%	Rank history: not on the FY2021–FY2022 lists, #82 in FY2023, #55 in FY2024 and #38 in FY2025; down 15 since Aug 2024–Jul 2025.
51	Miracle Systems LLC Top agencies DHS (Department of Homeland Security)	$70,349,186	0.2%	Rank history: not on the FY2021–FY2022 lists, #83 in FY2023, #80 in FY2024 and #53 in FY2025; up 26 since Aug 2024–Jul 2025.
52	Tecolote Research, Inc. Top agencies USAF (Department of the Air Force) OSD (Office of the Secretary of Defense) Navy (Department of the Navy)	$70,148,636	0.2%	Rank history: #88 in FY2021, #80 in FY2022, not on the FY2023–FY2024 lists and #51 in FY2025; up 7 since Aug 2024–Jul 2025.
53	Hendall Inc. Top agencies HHS (Department of Health and Human Services)	$66,005,146	0.2%	Rank history: not on the FY2021 list, #92 in FY2022, #87 in FY2023, #99 in FY2024 and not on the FY2025 list; up 329 since Aug 2024–Jul 2025.
54	Equifax Inc. Through Equifax Workforce Solutions LLC Top agencies SSA (Social Security Administration) DOJ (Department of Justice) USDA (Department of Agriculture)	$65,447,375	0.2%	Rank history: not on the FY2021–FY2024 lists and #66 in FY2025; new, not ranked in Aug 2024–Jul 2025.
55	Goldbelt, Incorporated 9 awardees, including Goldbelt Professional Services, LLC, Nisga'a Ciops LLC and Goldbelt Nighthawk, LLC Top agencies HHS (Department of Health and Human Services) Army (Department of the Army) USAF (Department of the Air Force)	$65,397,953	0.2%	Rank history: #91 in FY2021, #77 in FY2022, #84 in FY2023, not on the FY2024 list and #57 in FY2025; new, not ranked in Aug 2024–Jul 2025.
56	Acentra Health LLC 2 awardees, including EAP Consultants, LLC Top agencies DHS (Department of Homeland Security) DOL (Department of Labor) DOJ (Department of Justice)	$64,628,397	0.2%	Rank history: not on the FY2021–FY2025 lists; up 331 since Aug 2024–Jul 2025.
57	Revolutional, LLC Through Maveris LLC Top agencies VA (Department of Veterans Affairs)	$62,823,248	0.2%	Rank history: not on the FY2021–FY2024 lists and #54 in FY2025; new, not ranked in Aug 2024–Jul 2025.
58	Deep Mile Networks LLC Top agencies DHA (Defense Health Agency)	$61,006,453	0.2%	Rank history: not on the FY2021–FY2022 lists, #42 in FY2023, #54 in FY2024 and #43 in FY2025; down 9 since Aug 2024–Jul 2025.
59	Analytic Services Inc. Top agencies OSD (Office of the Secretary of Defense) Army (Department of the Army)	$60,417,976	0.2%	Rank history: not on the FY2021 list, #90 in FY2022, #79 in FY2023, #71 in FY2024 and #63 in FY2025; up 1 since Aug 2024–Jul 2025.
60	Acumen LLC Top agencies HHS (Department of Health and Human Services)	$59,589,022	0.2%	Rank history: #50 in FY2021, #56 in FY2022, #54 in FY2023, #57 in FY2024 and #59 in FY2025; up 5 since Aug 2024–Jul 2025.
61	Tactica Solutions LLC Top agencies Army (Department of the Army)	$55,474,555	0.2%	Rank history: not on the FY2021–FY2024 lists and #60 in FY2025; up 14 since Aug 2024–Jul 2025.
62	Delta Solutions & Strategies LLC Top agencies USAF (Department of the Air Force) USSOCOM (United States Special Operations Command)	$54,456,347	0.2%	Rank history: not on the FY2021–FY2023 lists, #94 in FY2024 and #70 in FY2025; up 40 since Aug 2024–Jul 2025.
63	Cbeyondata LLC Top agencies Army (Department of the Army) DOJ (Department of Justice)	$53,279,699	0.2%	Rank history: not on the FY2021–FY2024 lists and #73 in FY2025; up 68 since Aug 2024–Jul 2025.
64	Astrion Group, LLC 3 awardees, including Oasis Systems, LLC Top agencies NASA (National Aeronautics and Space Administration) DOT (Department of Transportation)	$51,950,107	0.2%	Rank history: not on the FY2021–FY2024 lists and #55 in FY2025; up 19 since Aug 2024–Jul 2025.
65	Threat Tec, LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) USSOCOM (United States Special Operations Command)	$51,497,003	0.2%	Rank history: not on the FY2021–FY2022 lists, #100 in FY2023, not on the FY2024 list and #77 in FY2025; up 33 since Aug 2024–Jul 2025.
66	Chickasaw Nation 10 awardees, including Chickasaw Aerospace, LLC, Chickasaw Federal Health, LLC and Chickasaw Strategic Pointe, LLC Top agencies DOT (Department of Transportation) HHS (Department of Health and Human Services) DHA (Defense Health Agency)	$49,644,950	0.2%	Rank history: not on the FY2021–FY2024 lists and #68 in FY2025; up 357 since Aug 2024–Jul 2025.
67	TMF Health Quality Institute Through C2C Innovative Solutions, Inc. Top agencies HHS (Department of Health and Human Services)	$48,693,149	0.2%	Rank history: #68 in FY2021, #91 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
68	Choctaw Premier Services LLC Top agencies Army (Department of the Army)	$47,395,401	0.2%	Rank history: not on the FY2021–FY2024 lists and #84 in FY2025; up 58 since Aug 2024–Jul 2025.
69	International Consulting Associates, Inc. Top agencies HHS (Department of Health and Human Services)	$47,202,880	0.2%	Rank history: not on the FY2021–FY2025 lists; up 299 since Aug 2024–Jul 2025.
70	Coventbridge (USA) LLC Top agencies HHS (Department of Health and Human Services)	$45,566,331	0.2%	Rank history: not on the FY2021–FY2024 lists and #89 in FY2025; up 26 since Aug 2024–Jul 2025.
71	Andrew Morgan, LLC Top agencies DHA (Defense Health Agency)	$45,346,972	0.2%	Rank history: not on the FY2021–FY2024 lists and #99 in FY2025; up 216 since Aug 2024–Jul 2025.
72	Securitas Critical Infrastructure Services Inc. Through Paragon Systems Inc. Top agencies HHS (Department of Health and Human Services) Navy (Department of the Navy)	$45,228,904	0.2%	Rank history: not on the FY2021–FY2024 lists and #86 in FY2025; up 58 since Aug 2024–Jul 2025.
73	Riverside Research Institute Top agencies USAF (Department of the Air Force)	$44,667,765	0.2%	Rank history: not on the FY2021–FY2025 lists; up 41 since Aug 2024–Jul 2025.
74	Constellis, LLC Through Centerra Group, LLC Top agencies DOE (Department of Energy)	$44,467,175	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
75	Jones Lang Lasalle Americas, Inc. Top agencies USAF (Department of the Air Force) OSD (Office of the Secretary of Defense) DOS (Department of State)	$44,398,789	0.2%	Rank history: not on the FY2021–FY2025 lists; up 142 since Aug 2024–Jul 2025.
76	Ardent Group, LLC Top agencies DHS (Department of Homeland Security)	$44,356,659	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
77	Augustine Consulting Inc. Top agencies Army (Department of the Army)	$43,394,605	0.1%	Rank history: not on the FY2021–FY2024 lists and #90 in FY2025; up 43 since Aug 2024–Jul 2025.
78	Concept Solutions LLC Top agencies DOT (Department of Transportation)	$43,118,772	0.1%	Rank history: not on the FY2021–FY2022 lists, #88 in FY2023, #98 in FY2024 and #72 in FY2025; up 14 since Aug 2024–Jul 2025.
79	Veracity Engineering LLC Top agencies DOT (Department of Transportation)	$41,655,255	0.1%	Rank history: not on the FY2021–FY2025 lists; up 53 since Aug 2024–Jul 2025.
80	Ernst & Young LLP 2 awardees Top agencies Army (Department of the Army) DOJ (Department of Justice) DHS (Department of Homeland Security)	$41,405,858	0.1%	Rank history: #44 in FY2021, #37 in FY2022, not on the FY2023 list, #23 in FY2024 and #26 in FY2025; down 54 since Aug 2024–Jul 2025.
81	Oak Ridge Associated Universities, Incorporated Top agencies HHS (Department of Health and Human Services) USDA (Department of Agriculture)	$40,993,048	0.1%	Rank history: #75 in FY2021, #68 in FY2022, #77 in FY2023, #86 in FY2024 and #83 in FY2025; up 10 since Aug 2024–Jul 2025.
82	Mathematica Inc. Top agencies HHS (Department of Health and Human Services) ED (Department of Education)	$40,582,774	0.1%	Rank history: not on the FY2021–FY2023 lists, #75 in FY2024 and not on the FY2025 list; up 19 since Aug 2024–Jul 2025.
83	Centene Corporation Through Magellan Federal, Inc. Top agencies DODEA (Department of Defense Education Activity) Peace Corps HHS (Department of Health and Human Services)	$40,087,156	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
84	Calibre Systems Inc. Top agencies Army (Department of the Army) OPM (Office of Personnel Management)	$39,067,298	0.1%	Rank history: #60 in FY2021, #63 in FY2022, #65 in FY2023, #73 in FY2024 and #74 in FY2025; down 2 since Aug 2024–Jul 2025.
85	Plowshare Group Inc Top agencies HHS (Department of Health and Human Services)	$39,000,000	0.1%	Rank history: #43 in FY2021, #48 in FY2022, #43 in FY2023, #58 in FY2024 and #81 in FY2025; down 29 since Aug 2024–Jul 2025.
86	Celeen LLC Top agencies DOD (Department of Defense) USAF (Department of the Air Force) Army (Department of the Army)	$38,224,445	0.1%	Rank history: not on the FY2021–FY2023 lists, #93 in FY2024 and #75 in FY2025; down 6 since Aug 2024–Jul 2025.
87	Qualx, LLC Top agencies WHS (DOD Washington Headquarters Service) Navy (Department of the Navy) OSD (Office of the Secretary of Defense)	$38,108,783	0.1%	Rank history: not on the FY2021–FY2025 lists; up 42 since Aug 2024–Jul 2025.
88	Gap Solutions, Inc. 2 awardees, including Keylogic, LLC Top agencies HHS (Department of Health and Human Services) EPA (Environmental Protection Agency) USAF (Department of the Air Force)	$37,905,396	0.1%	Rank history: not on the FY2021–FY2024 lists and #87 in FY2025; up 59 since Aug 2024–Jul 2025.
89	Mckinsey & Company, Inc. Washington D.c. Top agencies USAF (Department of the Air Force) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$37,723,633	0.1%	Rank history: not on the FY2021–FY2024 lists and #71 in FY2025; up 68 since Aug 2024–Jul 2025.
90	Ameresco Inc. 2 awardees, including Ameresco Select, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) Army (Department of the Army)	$36,713,750	0.1%	Rank history: not on the FY2021–FY2024 lists and #98 in FY2025; up 16 since Aug 2024–Jul 2025.
91	American Institutes for Research In the Behavioral Sciences Top agencies ED (Department of Education) HHS (Department of Health and Human Services) NEA (National Endowment for the Arts)	$36,464,231	0.1%	Rank history: #57 in FY2021, #49 in FY2022, #48 in FY2023, #53 in FY2024 and not on the FY2025 list; up 43 since Aug 2024–Jul 2025.
92	ELB Services LLC Top agencies USAF (Department of the Air Force)	$35,439,249	0.1%	Rank history: not on the FY2021–FY2025 lists; up 78 since Aug 2024–Jul 2025.
93	Index Analytics LLC Top agencies HHS (Department of Health and Human Services)	$35,253,617	0.1%	Rank history: not on the FY2021–FY2024 lists and #97 in FY2025; up 18 since Aug 2024–Jul 2025.
94	Westat, Inc. 2 awardees, including Insight Policy Research, Inc. Top agencies HHS (Department of Health and Human Services) ED (Department of Education) USDA (Department of Agriculture)	$35,058,617	0.1%	Rank history: #51 in FY2021, #38 in FY2022, #49 in FY2023, #26 in FY2024 and not on the FY2025 list; down 25 since Aug 2024–Jul 2025.
95	International Development & Resources, Inc. Top agencies Army (Department of the Army)	$34,985,452	0.1%	Rank history: not on the FY2021–FY2025 lists; up 100 since Aug 2024–Jul 2025.
96	The Mitre Corporation Top agencies HHS (Department of Health and Human Services) Commerce (Department of Commerce) DOJ (Department of Justice)	$34,840,164	0.1%	Rank history: not on the FY2021–FY2023 lists, #96 in FY2024 and not on the FY2025 list; down 29 since Aug 2024–Jul 2025.
97	System High Corporation Top agencies DARPA (Defense Advanced Research Projects Agency) USAF (Department of the Air Force) Navy (Department of the Navy)	$34,477,528	0.1%	Rank history: not on the FY2021–FY2022 lists, #92 in FY2023, #88 in FY2024 and #67 in FY2025; down 24 since Aug 2024–Jul 2025.
98	ABT Global LLC 3 awardees, including Technology Solutions Provider, LLC Top agencies HHS (Department of Health and Human Services) EPA (Environmental Protection Agency) Army (Department of the Army)	$34,049,712	0.1%	Rank history: #47 in FY2021, #51 in FY2022, #80 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
99	Gemini Industries Inc. Top agencies USAF (Department of the Air Force)	$33,722,381	0.1%	Rank history: not on the FY2021–FY2024 lists and #82 in FY2025; down 23 since Aug 2024–Jul 2025.
100	Charles River Laboratories International Inc. Through Charles River Laboratories, Inc. Top agencies HHS (Department of Health and Human Services)	$33,174,322	0.1%	Rank history: not on the FY2021–FY2025 lists; up 41 since Aug 2024–Jul 2025.

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 $29.4 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. An awardee whose own actions mostly name no parent, and that no other company's actions name as their parent, rolls up its SAM.gov registration's chain of parent companies: it counts under the first company there that other companies' actions name as their parent, or under the parent most of a company's own actions name, whichever comes first; with neither, under the highest company in the chain with federal contracts of its own. Joint ventures stay companies of their own. 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.
• Period: the trailing 12 months end with the last month that ended at least 90 days ago, because the Department of Defense reports its contract actions to FPDS about 90 days late. The list is rebuilt each night.
• Rank changes compare with Aug 2024–Jul 2025. "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.
• Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

Quick answers