Top 100 Contractors in NAICS 8139: Business, Professional, Labor, Political, and Similar Organizations, FY2025

Name: Top 100 Contractors in NAICS 8139: Business, Professional, Labor, Political, and Similar Organizations, FY2025
Creator: GovTribe
License: https://creativecommons.org/licenses/by/4.0/

Parent companies by net contract obligations Oct 1, 2024 – Sep 30, 2025 Code page on GovTribe

The top 10 won 53% of FY2025 NAICS 8139 contract dollars

Contract obligations: $81,700,921 Net of deobligations, by contracts coded NAICS 8139 or a code under it
Contractors: 299 Parent companies with an obligation
Largest contractor: General Dynamics Corporation $15.4 million, 15.7% of obligations
Data as of: Oct 14, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV · Free to reuse with credit to GovTribe (CC BY 4.0)

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	General Dynamics Corporation Through General Dynamics Information Technology, Inc. Top agencies DHA (Defense Health Agency) Army (Department of the Army) USAF (Department of the Air Force)	$15,432,126	15.7%	Rank history: not on the FY2021 list, #1 in FY2022, #1 in FY2023 and #1 in FY2024; unchanged since FY2024.
2	Joint Commission On Accreditation of Healthcare Organizations Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$13,803,696	14.0%	Rank history: #1 in FY2021, #2 in FY2022, #2 in FY2023 and #2 in FY2024; unchanged since FY2024.
3	Quality Insights, Inc. Top agencies VA (Department of Veterans Affairs)	$7,061,763	7.2%	Rank history: not on the FY2021–FY2023 lists and #3 in FY2024; unchanged since FY2024.
4	Naval Academy Athletic Association Top agencies Navy (Department of the Navy)	$3,588,265	3.6%	Rank history: #5 in FY2021, #5 in FY2022, #5 in FY2023 and #55 in FY2024; up 51 since FY2024.
5	Sae International Top agencies DOT (Department of Transportation)	$2,492,892	2.5%	Rank history: #7 in FY2021, #13 in FY2022, #13 in FY2023 and #12 in FY2024; up 7 since FY2024.
6	Commission On Accreditation of Rehabilitation Facilities Top agencies VA (Department of Veterans Affairs)	$2,290,278	2.3%	Rank history: #4 in FY2021, #16 in FY2022, #16 in FY2023 and #5 in FY2024; down 1 since FY2024.
7	North American Association of Central Cancer Registries Inc. Top agencies HHS (Department of Health and Human Services)	$2,141,678	2.2%	Rank history: #6 in FY2021, #7 in FY2022, #6 in FY2023 and #6 in FY2024; down 1 since FY2024.
8	Nevada System of Higher Education Top agencies Commerce (Department of Commerce)	$2,064,891	2.1%	Rank history: not on the FY2021 list, #33 in FY2022, not on the FY2023 list and #4 in FY2024; down 4 since FY2024.
9	Cornell University Top agencies Commerce (Department of Commerce)	$1,494,423	1.5%	Rank history: #22 in FY2021, #22 in FY2022, not on the FY2023 list and #13 in FY2024; up 4 since FY2024.
10	American College of Surgeons Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$1,462,206	1.5%	Rank history: #13 in FY2021, #8 in FY2022, #19 in FY2023 and #48 in FY2024; up 38 since FY2024.
11	College of American Pathologists Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$1,390,290	1.4%	Rank history: not on the FY2021–FY2024 lists; up 127 since FY2024.
12	Capital Factory Properties LLC Top agencies Army (Department of the Army)	$1,203,290	1.2%	Rank history: #26 in FY2021, #28 in FY2022, #20 in FY2023 and #15 in FY2024; up 3 since FY2024.
13	The American Society of Human Genetics, Incorporated Top agencies HHS (Department of Health and Human Services)	$1,118,834	1.1%	Rank history: not on the FY2021 list, #89 in FY2022, #75 in FY2023 and #22 in FY2024; up 9 since FY2024.
14	Board of Regents of the University of Nebraska Top agencies Commerce (Department of Commerce)	$1,026,502	1.0%	Rank history: not on the FY2021–FY2023 lists and #20 in FY2024; up 6 since FY2024.
15	Texas A&M Transportation Institute Top agencies Commerce (Department of Commerce)	$1,011,747	1.0%	Rank history: not on the FY2021–FY2023 lists and #18 in FY2024; up 3 since FY2024.
16	American Hospital Association Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$958,358	1.0%	Rank history: #28 in FY2021, #36 in FY2022, #26 in FY2023 and #25 in FY2024; up 9 since FY2024.
17	National Association for Public Health Statistics and Information Systems, Inc. Top agencies HHS (Department of Health and Human Services) SSA (Social Security Administration) CPSC (Consumer Product Safety Commission)	$954,918	1.0%	Rank history: #9 in FY2021, #15 in FY2022, #15 in FY2023 and #8 in FY2024; down 9 since FY2024.
18	Institute of Transportation Engineers, Inc. Top agencies DOT (Department of Transportation)	$946,664	1.0%	Rank history: #41 in FY2021, #4 in FY2022, #8 in FY2023 and #11 in FY2024; down 7 since FY2024.
19	Purdue University Top agencies Commerce (Department of Commerce)	$940,146	1.0%	Rank history: #34 in FY2021, #31 in FY2022, #22 in FY2023 and #19 in FY2024; unchanged since FY2024.
20	University of North Carolina At Chapel Hill Top agencies Commerce (Department of Commerce)	$919,167	0.9%	Rank history: not on the FY2021–FY2023 lists and #24 in FY2024; up 4 since FY2024.
21	American Institute In Taiwan Top agencies DHS (Department of Homeland Security)	$898,115	0.9%	Rank history: not on the FY2021–FY2024 lists; new.
22	American Association for the Advancement of Science Top agencies DOS (Department of State) HHS (Department of Health and Human Services) Treasury (Department of the Treasury)	$848,920	0.9%	Rank history: #8 in FY2021, #12 in FY2022, #9 in FY2023 and #14 in FY2024; down 8 since FY2024.
23	John Wiley & Sons Inc. Top agencies Navy (Department of the Navy)	$792,415	0.8%	Rank history: not on the FY2021–FY2024 lists; new.
24	Rtca Inc. Top agencies DOT (Department of Transportation) NASA (National Aeronautics and Space Administration)	$709,094	0.7%	Rank history: #25 in FY2021, #19 in FY2022, #39 in FY2023 and #26 in FY2024; up 2 since FY2024.
25	American Psychological Association Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) DOJ (Department of Justice)	$630,760	0.6%	Rank history: #27 in FY2021, not on the FY2022 list, #33 in FY2023 and #40 in FY2024; up 15 since FY2024.
26	American College of Medical Toxicology, Inc. Top agencies HHS (Department of Health and Human Services)	$583,500	0.6%	Rank history: not on the FY2021–FY2023 lists and #34 in FY2024; up 8 since FY2024.
27	Institute of Electrical & Electronics Engineers Inc. Top agencies Navy (Department of the Navy) MDA (DOD Missile Defense Agency) DISA (Defense Information Systems Agency)	$561,945	0.6%	Rank history: not on the FY2021–FY2023 lists and #47 in FY2024; up 20 since FY2024.
28	Challenge America Top agencies VA (Department of Veterans Affairs)	$557,000	0.6%	Rank history: not on the FY2021 list, #59 in FY2022, not on the FY2023 list and #35 in FY2024; up 7 since FY2024.
29	Military Operations Research Society, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$552,600	0.6%	Rank history: #43 in FY2021, #49 in FY2022, #49 in FY2023 and #43 in FY2024; up 14 since FY2024.
30	American Association of Blood Banks, Inc. Top agencies DHA (Defense Health Agency)	$521,391	0.5%	Rank history: #37 in FY2021, #42 in FY2022, #41 in FY2023 and #38 in FY2024; up 8 since FY2024.
31	Kulanihiwa Enocencio Top agencies DOI (Department of the Interior)	$500,000	0.5%	Rank history: not on the FY2021–FY2024 lists; new.
32	Priority Install, LLC Top agencies HHS (Department of Health and Human Services)	$468,841	0.5%	Rank history: not on the FY2021–FY2024 lists; new.
33	Academy Health Top agencies VA (Department of Veterans Affairs)	$464,210	0.5%	Rank history: #39 in FY2021, #17 in FY2022, #32 in FY2023 and #16 in FY2024; down 17 since FY2024.
34	National Conference of Bar Examiners	$376,830	0.4%	Rank history: not on the FY2021–FY2022 lists, #50 in FY2023 and #41 in FY2024; up 7 since FY2024.
35	Accreditation Association for Ambulatory Health Care, Inc. Top agencies HHS (Department of Health and Human Services) DHS (Department of Homeland Security)	$348,453	0.4%	Rank history: #32 in FY2021, #26 in FY2022, not on the FY2023 list and #44 in FY2024; up 9 since FY2024.
36	Accreditation Council for Graduate Medical Education Top agencies USUHS (DOD Uniformed Services University of the Health Sciences) VA (Department of Veterans Affairs)	$344,349	0.3%	Rank history: #51 in FY2021, #56 in FY2022, #42 in FY2023 and #42 in FY2024; up 6 since FY2024.
37	American Association of State Highway and Transportation Officials Top agencies DOT (Department of Transportation)	$301,000	0.3%	Rank history: not on the FY2021–FY2023 lists and #23 in FY2024; down 14 since FY2024.
38	American Medical Informatics Association, Inc. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) DHA (Defense Health Agency)	$288,050	0.3%	Rank history: not on the FY2021–FY2022 lists, #60 in FY2023 and #53 in FY2024; up 15 since FY2024.
39	Vlogic Systems, Inc. Top agencies VA (Department of Veterans Affairs)	$259,344	0.3%	Rank history: #55 in FY2021, #62 in FY2022, #65 in FY2023 and #59 in FY2024; up 20 since FY2024.
40	Ceati International Inc. Top agencies DOI (Department of the Interior) DOE (Department of Energy) Army (Department of the Army)	$251,544	0.3%	Rank history: #58 in FY2021, #66 in FY2022, #66 in FY2023 and #62 in FY2024; up 22 since FY2024.
41	OASIS Open Top agencies DOJ (Department of Justice) DHS (Department of Homeland Security) OSD (Office of the Secretary of Defense)	$243,250	0.2%	Rank history: not on the FY2021–FY2023 lists and #82 in FY2024; up 41 since FY2024.
42	American Association for Laboratory Accreditation, Inc. Top agencies USDA (Department of Agriculture) HHS (Department of Health and Human Services) Treasury (Department of the Treasury)	$219,623	0.2%	Rank history: #95 in FY2021, #91 in FY2022, #92 in FY2023 and #69 in FY2024; up 27 since FY2024.
43	Mgma-Acmpe Top agencies VA (Department of Veterans Affairs)	$215,270	0.2%	Rank history: #89 in FY2021, #80 in FY2022, #78 in FY2023 and #70 in FY2024; up 27 since FY2024.
44	University of Maryland, College Park Top agencies Commerce (Department of Commerce) NASA (National Aeronautics and Space Administration)	$204,216	0.2%	Rank history: not on the FY2021–FY2023 lists and #99 in FY2024; up 55 since FY2024.
45	Cabell Publishing Co Top agencies USDA (Department of Agriculture)	$201,349	0.2%	Rank history: #40 in FY2021, not on the FY2022–FY2023 lists and #68 in FY2024; up 23 since FY2024.
46	American College of Emergency Physicians Top agencies HHS (Department of Health and Human Services)	$200,000	0.2%	Rank history: #57 in FY2021, #71 in FY2022, #72 in FY2023 and #60 in FY2024; up 14 since FY2024.
47	Hydropower Research Institute Top agencies DOI (Department of the Interior)	$200,000	0.2%	Rank history: #69 in FY2021, #46 in FY2022, #56 in FY2023 and not on the FY2024 list; up 241 since FY2024.
48	Global Leadership Exchange, Inc. Top agencies HHS (Department of Health and Human Services)	$199,500	0.2%	Rank history: #97 in FY2021, #92 in FY2022, not on the FY2023 list and #71 in FY2024; up 23 since FY2024.
49	America Movil Peru Sac Top agencies DOS (Department of State)	$186,677	0.2%	Rank history: not on the FY2021–FY2023 lists and #50 in FY2024; up 1 since FY2024.
50	Juice Consulting LLC Top agencies OSD (Office of the Secretary of Defense)	$186,666	0.2%	Rank history: #63 in FY2021, #29 in FY2022, #61 in FY2023 and #21 in FY2024; down 29 since FY2024.
51	American Society of Health-System Pharmacists Inc. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) DHA (Defense Health Agency)	$174,704	0.2%	Rank history: #79 in FY2021, #82 in FY2022, #74 in FY2023 and #73 in FY2024; up 22 since FY2024.
52	American Medical Association Top agencies VA (Department of Veterans Affairs) SSA (Social Security Administration)	$160,122	0.2%	Rank history: not on the FY2021 list, #93 in FY2022, not on the FY2023 list and #72 in FY2024; up 20 since FY2024.
53	Alliance for Telecommunications Industry Solutions Inc. Top agencies Commerce (Department of Commerce) DOT (Department of Transportation) OSD (Office of the Secretary of Defense)	$156,800	0.2%	Rank history: #82 in FY2021, #97 in FY2022, #96 in FY2023 and #90 in FY2024; up 37 since FY2024.
54	University Corporation for Advanced Internet Development Top agencies Commerce (Department of Commerce) NSF (National Science Foundation) NASA (National Aeronautics and Space Administration)	$143,130	0.1%	Rank history: #66 in FY2021, #98 in FY2022, #83 in FY2023 and #65 in FY2024; up 11 since FY2024.
55	American Society for Radiation Oncology Top agencies VA (Department of Veterans Affairs)	$142,500	0.1%	Rank history: #100 in FY2021, not on the FY2022 list, #89 in FY2023 and #95 in FY2024; up 40 since FY2024.
56	Global Carbon Capture and Storage Institute Ltd Top agencies DOE (Department of Energy)	$137,250	0.1%	Rank history: not on the FY2021 list, #75 in FY2022, #79 in FY2023 and #75 in FY2024; up 19 since FY2024.
57	The National Registry of Emergency Medical Technicians Inc. Top agencies USAF (Department of the Air Force)	$132,000	0.1%	Rank history: #74 in FY2021, not on the FY2022 list, #55 in FY2023 and #56 in FY2024; down 1 since FY2024.
58	American Astronomical Society Top agencies NSF (National Science Foundation)	$131,597	0.1%	Rank history: not on the FY2021–FY2022 lists, #58 in FY2023 and not on the FY2024 list; up 46 since FY2024.
59	National Council for Prescription Drug Programs Inc. Top agencies HHS (Department of Health and Human Services) DOL (Department of Labor)	$128,944	0.1%	Rank history: #60 in FY2021, #69 in FY2022, #86 in FY2023 and #83 in FY2024; up 24 since FY2024.
60	RMG and Associates Top agencies Treasury (Department of the Treasury)	$127,888	0.1%	Rank history: not on the FY2021–FY2022 lists, #57 in FY2023 and #81 in FY2024; up 21 since FY2024.
61	Healthcare Information and Management Systems Society Top agencies DHA (Defense Health Agency) HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$125,815	0.1%	Rank history: #48 in FY2021, #67 in FY2022, #68 in FY2023 and #93 in FY2024; up 32 since FY2024.
62	International Electrical Testing Association Top agencies Army (Department of the Army)	$122,720	0.1%	Rank history: not on the FY2021 list, #95 in FY2022, #87 in FY2023 and #74 in FY2024; up 12 since FY2024.
63	Southwest Texas Regional Advisory Council Top agencies DHA (Defense Health Agency)	$114,670	0.1%	Rank history: not on the FY2021–FY2024 lists; up 217 since FY2024.
64	American Great Lakes Ports Association Inc. Top agencies DOT (Department of Transportation)	$110,000	0.1%	Rank history: not on the FY2021–FY2024 lists; up 125 since FY2024.
65	The American Correctional Association Top agencies DOS (Department of State) Army (Department of the Army)	$107,600	0.1%	Rank history: not on the FY2021–FY2024 lists; up 144 since FY2024.
66	Health Level Seven International Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$107,530	0.1%	Rank history: not on the FY2021–FY2024 lists; up 43 since FY2024.
67	Gartner, Inc. Top agencies DOT (Department of Transportation)	$104,937	0.1%	Rank history: #75 in FY2021, #51 in FY2022, #35 in FY2023 and #28 in FY2024; down 39 since FY2024.
68	National Cancer Registrars Association Top agencies HHS (Department of Health and Human Services)	$104,830	0.1%	Rank history: not on the FY2021 list, #87 in FY2022, #91 in FY2023 and #100 in FY2024; up 32 since FY2024.
69	Stichting Maritiem Research Instituut Nederland Top agencies Navy (Department of the Navy)	$102,600	0.1%	Rank history: not on the FY2021–FY2024 lists; up 101 since FY2024.
70	Association for Clinical Pastoral Education Inc. Top agencies Army (Department of the Army) VA (Department of Veterans Affairs)	$102,226	0.1%	Rank history: not on the FY2021–FY2024 lists; up 74 since FY2024.
71	World 50 LLC Top agencies NASA (National Aeronautics and Space Administration)	$101,000	0.1%	Rank history: not on the FY2021–FY2024 lists; up 50 since FY2024.
72	Medical Center Alliance Top agencies VA (Department of Veterans Affairs)	$100,000	0.1%	Rank history: not on the FY2021–FY2024 lists; up 33 since FY2024.
73	Texas A & M University Top agencies HHS (Department of Health and Human Services)	$100,000	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
74	American Society for Testing & Materials Top agencies NASA (National Aeronautics and Space Administration)	$100,000	0.1%	Rank history: not on the FY2021–FY2024 lists; up 37 since FY2024.
75	Fitzpatrick Laurie Top agencies Army (Department of the Army)	$98,000	0.1%	Rank history: not on the FY2021–FY2024 lists; up 35 since FY2024.
76	Association for the Advancement of Medical Instrumentation Inc Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$95,382	0.1%	Rank history: not on the FY2021–FY2024 lists; up 38 since FY2024.
77	American National Standards Institute Incorporated Top agencies DHS (Department of Homeland Security) USAF (Department of the Air Force) USDA (Department of Agriculture)	$92,543	0.1%	Rank history: #91 in FY2021, #74 in FY2022, #44 in FY2023 and #39 in FY2024; down 38 since FY2024.
78	Council of Chief State School Officers, Incorporated Top agencies DOI (Department of the Interior)	$91,428	0.1%	Rank history: not on the FY2021–FY2023 lists and #86 in FY2024; up 8 since FY2024.
79	American Dental Association Top agencies HHS (Department of Health and Human Services) USAF (Department of the Air Force)	$90,100	0.1%	Rank history: not on the FY2021–FY2024 lists; up 58 since FY2024.
80	Information Technology Industry Council Inc. Top agencies DISA (Defense Information Systems Agency) Commerce (Department of Commerce)	$85,101	0.1%	Rank history: not on the FY2021–FY2023 lists and #89 in FY2024; up 9 since FY2024.
81	American Industrial Hygiene Association Top agencies DHA (Defense Health Agency) Navy (Department of the Navy)	$83,790	0.1%	Rank history: not on the FY2021–FY2024 lists; up 31 since FY2024.
82	Accreditation Council for Pharmacy Education Top agencies VA (Department of Veterans Affairs)	$80,500	0.1%	Rank history: not on the FY2021–FY2024 lists; up 46 since FY2024.
83	American Dental Assistants Association Top agencies USAF (Department of the Air Force)	$79,560	0.1%	Rank history: not on the FY2021–FY2024 lists; up 47 since FY2024.
84	Reliable Supply Chains International Inc. Top agencies DOS (Department of State)	$78,364	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
85	The American Institute of Architects Top agencies GSA (General Services Administration)	$77,250	0.1%	Rank history: not on the FY2021–FY2024 lists; up 48 since FY2024.
86	Open Geospatial Consortium Inc. Top agencies DHS (Department of Homeland Security) DOT (Department of Transportation)	$77,000	0.1%	Rank history: #20 in FY2021, #24 in FY2022, #40 in FY2023 and #33 in FY2024; down 53 since FY2024.
87	Montgomery Area Chamber of Commerce Top agencies USAF (Department of the Air Force)	$75,856	0.1%	Rank history: not on the FY2021 list, #60 in FY2022, #54 in FY2023 and not on the FY2024 list; returned.
88	American Psychiatric Association Top agencies SSA (Social Security Administration)	$75,329	0.1%	Rank history: not on the FY2021–FY2024 lists; up 51 since FY2024.
89	American Geosciences Institute Top agencies DOI (Department of the Interior)	$75,000	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
90	Asis International Inc. Top agencies DHS (Department of Homeland Security)	$74,970	0.1%	Rank history: #49 in FY2021 and not on the FY2022–FY2024 lists; up 34 since FY2024.
91	Ass Mondiale De La Route Top agencies DOT (Department of Transportation)	$74,800	0.1%	Rank history: not on the FY2021–FY2022 lists, #67 in FY2023 and not on the FY2024 list; up 137 since FY2024.
92	National Commission On Correctional Health Care Top agencies DHS (Department of Homeland Security) DOJ (Department of Justice)	$73,663	0.1%	Rank history: not on the FY2021–FY2023 lists and #87 in FY2024; down 5 since FY2024.
93	Abms Solutions LLC Top agencies DOL (Department of Labor)	$72,925	0.1%	Rank history: not on the FY2021–FY2024 lists; up 50 since FY2024.
94	American Society of Civil Engineers Top agencies DOT (Department of Transportation) Navy (Department of the Navy)	$72,484	0.1%	Rank history: not on the FY2021–FY2024 lists; up 28 since FY2024.
95	American Nurses Credentialing Center, Inc. A / K / A American Nurses Credentialing Center Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$71,860	0.1%	Rank history: not on the FY2021–FY2023 lists and #97 in FY2024; up 2 since FY2024.
96	The Open Group, L.l.c Top agencies Navy (Department of the Navy) NASA (National Aeronautics and Space Administration)	$69,225	0.1%	Rank history: not on the FY2021–FY2024 lists; up 78 since FY2024.
97	National Building Museum (The)	$69,000	0.1%	Rank history: not on the FY2021–FY2024 lists; up 51 since FY2024.
98	Evidence Group LLC Top agencies DOS (Department of State)	$68,320	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
99	Construction Management Association of America, Inc. Top agencies DHS (Department of Homeland Security) Army (Department of the Army) DOS (Department of State)	$67,500	0.1%	Rank history: not on the FY2021–FY2024 lists; up 56 since FY2024.
100	American Chemical Society Top agencies Navy (Department of the Navy)	$65,336	0.1%	Rank history: not on the FY2021–FY2024 lists; up 50 since FY2024.

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100 of 299 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 8139

Code	Net obligations	Largest contractor
81392 Professional Organizations	$73,304,185	General Dynamics Corporation
81391 Business Associations	$2,139,973	American Hospital Association

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 $98.4 million 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 2025 ran Oct 1, 2024 – Sep 30, 2025. 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 FY2024. "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 FY2024 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

Who were the top 10 NAICS 8139 contractors in FY2025?

1. General Dynamics Corporation ($15.4M), 2. Joint Commission On Accreditation of Healthcare Organizations ($13.8M), 3. Quality Insights, Inc. ($7.06M), 4. Naval Academy Athletic Association ($3.59M), 5. Sae International ($2.49M), 6. Commission On Accreditation of Rehabilitation Facilities ($2.29M), 7. North American Association of Central Cancer Registries Inc. ($2.14M), 8. Nevada System of Higher Education ($2.06M), 9. Cornell University ($1.49M), 10. American College of Surgeons ($1.46M).

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