Top 100 Contractors in NAICS 8139: Business, Professional, Labor, Political, and Similar Organizations, Jul 2025–Jun 2026

Name: Top 100 Contractors in NAICS 8139: Business, Professional, Labor, Political, and Similar Organizations, Jul 2025–Jun 2026
Creator: GovTribe

Parent companies by net contract obligations Jul 1, 2025 – Jun 30, 2026 Code page on GovTribe

The top 10 won 62% of NAICS 8139 contract dollars from July 2025 through June 2026

Contract obligations: $90,313,366 Net of deobligations, by contracts coded NAICS 8139 or a code under it
Contractors: 228 Parent companies with an obligation
Largest contractor: General Dynamics Corporation $27.1 million, 26.7% of obligations
Data as of: Oct 14, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	General Dynamics Corporation Through General Dynamics Information Technology, Inc. Top agencies DHA (Defense Health Agency) USAF (Department of the Air Force)	$27,082,484	26.7%	Rank history: not on the FY2021 list, #1 in FY2022, #1 in FY2023, #1 in FY2024 and #1 in FY2025; up 1 since Jul 2024–Jun 2025.
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)	$11,661,769	11.5%	Rank history: #1 in FY2021, #2 in FY2022, #2 in FY2023, #2 in FY2024 and #2 in FY2025; down 1 since Jul 2024–Jun 2025.
3	Quality Insights, Inc. Top agencies VA (Department of Veterans Affairs)	$10,431,168	10.3%	Rank history: not on the FY2021–FY2023 lists, #3 in FY2024 and #3 in FY2025; unchanged since Jul 2024–Jun 2025.
4	National Association for Public Health Statistics and Information Systems, Inc. Top agencies DOS (Department of State) HHS (Department of Health and Human Services) SSA (Social Security Administration)	$2,603,951	2.6%	Rank history: #9 in FY2021, #15 in FY2022, #15 in FY2023, #8 in FY2024 and #17 in FY2025; up 42 since Jul 2024–Jun 2025.
5	Sae International Top agencies DOT (Department of Transportation)	$2,275,187	2.2%	Rank history: #7 in FY2021, #13 in FY2022, #13 in FY2023, #12 in FY2024 and #5 in FY2025; up 6 since Jul 2024–Jun 2025.
6	Maximus Federal Services, Inc. Top agencies VA (Department of Veterans Affairs)	$2,066,854	2.0%	Rank history: #42 in FY2021, not on the FY2022–FY2023 lists, #9 in FY2024 and not on the FY2025 list; up 1 since Jul 2024–Jun 2025.
7	Center for Energy Workforce Development Top agencies DOL (Department of Labor)	$1,984,555	2.0%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
8	American College of Surgeons Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$1,767,577	1.7%	Rank history: #13 in FY2021, #8 in FY2022, #19 in FY2023, #48 in FY2024 and #10 in FY2025; up 5 since Jul 2024–Jun 2025.
9	Nevada System of Higher Education Top agencies Commerce (Department of Commerce)	$1,757,344	1.7%	Rank history: not on the FY2021 list, #33 in FY2022, not on the FY2023 list, #4 in FY2024 and #8 in FY2025; down 5 since Jul 2024–Jun 2025.
10	Provider Resources Inc Top agencies VA (Department of Veterans Affairs)	$1,668,308	1.6%	Rank history: #19 in FY2021, #20 in FY2022, #11 in FY2023, #7 in FY2024 and not on the FY2025 list; down 4 since Jul 2024–Jun 2025.
11	Island Peer Review Organization Inc. Top agencies VA (Department of Veterans Affairs)	$1,472,553	1.5%	Rank history: not on the FY2021–FY2023 lists, #10 in FY2024 and not on the FY2025 list; down 1 since Jul 2024–Jun 2025.
12	College of American Pathologists Top agencies VA (Department of Veterans Affairs)	$1,306,575	1.3%	Rank history: not on the FY2021–FY2024 lists and #11 in FY2025; up 85 since Jul 2024–Jun 2025.
13	American Psychological Association Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$1,267,530	1.3%	Rank history: #27 in FY2021, not on the FY2022 list, #33 in FY2023, #40 in FY2024 and #25 in FY2025; up 25 since Jul 2024–Jun 2025.
14	Capital Factory Properties LLC Top agencies Army (Department of the Army)	$1,113,390	1.1%	Rank history: #26 in FY2021, #28 in FY2022, #20 in FY2023, #15 in FY2024 and #12 in FY2025; up 1 since Jul 2024–Jun 2025.
15	The American Society of Human Genetics, Incorporated Top agencies HHS (Department of Health and Human Services)	$1,078,948	1.1%	Rank history: not on the FY2021 list, #89 in FY2022, #75 in FY2023, #22 in FY2024 and #13 in FY2025; up 1 since Jul 2024–Jun 2025.
16	American Hospital Association Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$1,015,967	1.0%	Rank history: #28 in FY2021, #36 in FY2022, #26 in FY2023, #25 in FY2024 and #16 in FY2025; up 6 since Jul 2024–Jun 2025.
17	Cornell University Top agencies Commerce (Department of Commerce)	$977,313	1.0%	Rank history: #22 in FY2021, #22 in FY2022, not on the FY2023 list, #13 in FY2024 and #9 in FY2025; down 5 since Jul 2024–Jun 2025.
18	John Wiley & Sons Inc. Top agencies Navy (Department of the Navy)	$816,187	0.8%	Rank history: not on the FY2021–FY2024 lists and #23 in FY2025; up 8 since Jul 2024–Jun 2025.
19	Board of Regents of the University of Nebraska Top agencies Commerce (Department of Commerce)	$781,954	0.8%	Rank history: not on the FY2021–FY2023 lists, #20 in FY2024 and #14 in FY2025; unchanged since Jul 2024–Jun 2025.
20	Texas A&M Transportation Institute Top agencies Commerce (Department of Commerce)	$758,959	0.7%	Rank history: not on the FY2021–FY2023 lists, #18 in FY2024 and #15 in FY2025; down 2 since Jul 2024–Jun 2025.
21	Purdue University Top agencies Commerce (Department of Commerce)	$711,622	0.7%	Rank history: #34 in FY2021, #31 in FY2022, #22 in FY2023, #19 in FY2024 and #19 in FY2025; down 1 since Jul 2024–Jun 2025.
22	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, #26 in FY2024 and #24 in FY2025; up 7 since Jul 2024–Jun 2025.
23	Institute of Transportation Engineers, Inc. Top agencies DOT (Department of Transportation)	$635,728	0.6%	Rank history: #41 in FY2021, #4 in FY2022, #8 in FY2023, #11 in FY2024 and #18 in FY2025; up 2 since Jul 2024–Jun 2025.
24	American Association of Blood Banks, Inc. Top agencies DHA (Defense Health Agency)	$550,012	0.5%	Rank history: #37 in FY2021, #42 in FY2022, #41 in FY2023, #38 in FY2024 and #30 in FY2025; up 13 since Jul 2024–Jun 2025.
25	Accreditation Association for Ambulatory Health Care, Inc. Top agencies DHS (Department of Homeland Security) HHS (Department of Health and Human Services)	$515,522	0.5%	Rank history: #32 in FY2021, #26 in FY2022, not on the FY2023 list, #44 in FY2024 and #35 in FY2025; up 28 since Jul 2024–Jun 2025.
26	Academy Health Top agencies VA (Department of Veterans Affairs)	$464,210	0.5%	Rank history: #39 in FY2021, #17 in FY2022, #32 in FY2023, #16 in FY2024 and #33 in FY2025; down 9 since Jul 2024–Jun 2025.
27	American Association for the Advancement of Science Top agencies DOS (Department of State) Treasury (Department of the Treasury) HHS (Department of Health and Human Services)	$433,871	0.4%	Rank history: #8 in FY2021, #12 in FY2022, #9 in FY2023, #14 in FY2024 and #22 in FY2025; down 13 since Jul 2024–Jun 2025.
28	Cabell Publishing Co Top agencies USDA (Department of Agriculture)	$407,531	0.4%	Rank history: #40 in FY2021, not on the FY2022–FY2023 lists, #68 in FY2024 and #45 in FY2025; up 42 since Jul 2024–Jun 2025.
29	North American Association of Central Cancer Registries Inc. Top agencies HHS (Department of Health and Human Services) USAF (Department of the Air Force)	$402,336	0.4%	Rank history: #6 in FY2021, #7 in FY2022, #6 in FY2023, #6 in FY2024 and #7 in FY2025; down 20 since Jul 2024–Jun 2025.
30	University of North Carolina System Office Through University of North Carolina At Chapel Hill Top agencies Commerce (Department of Commerce)	$393,976	0.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
31	National Conference of Bar Examiners	$334,964	0.3%	Rank history: not on the FY2021–FY2022 lists, #50 in FY2023, #41 in FY2024 and #34 in FY2025; up 10 since Jul 2024–Jun 2025.
32	Segurcaixa Adeslas, S.A. De Seguros Y Reaseguros. Top agencies DOS (Department of State) Commerce (Department of Commerce)	$327,232	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
33	American Association of State Highway and Transportation Officials Top agencies DOT (Department of Transportation)	$326,000	0.3%	Rank history: not on the FY2021–FY2023 lists, #23 in FY2024 and #37 in FY2025; down 2 since Jul 2024–Jun 2025.
34	Military Operations Research Society, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army)	$318,270	0.3%	Rank history: #43 in FY2021, #49 in FY2022, #49 in FY2023, #43 in FY2024 and #29 in FY2025; down 7 since Jul 2024–Jun 2025.
35	University of North Carolina At Chapel Hill Top agencies Commerce (Department of Commerce)	$296,991	0.3%	Rank history: not on the FY2021–FY2023 lists, #24 in FY2024 and #20 in FY2025; down 14 since Jul 2024–Jun 2025.
36	Accreditation Council for Graduate Medical Education Top agencies USUHS (DOD Uniformed Services University of the Health Sciences)	$296,943	0.3%	Rank history: #51 in FY2021, #56 in FY2022, #42 in FY2023, #42 in FY2024 and #36 in FY2025; up 11 since Jul 2024–Jun 2025.
37	American Medical Association Top agencies VA (Department of Veterans Affairs) SSA (Social Security Administration)	$293,563	0.3%	Rank history: not on the FY2021 list, #93 in FY2022, not on the FY2023 list, #72 in FY2024 and #52 in FY2025; up 38 since Jul 2024–Jun 2025.
38	American College of Emergency Physicians Top agencies HHS (Department of Health and Human Services)	$292,000	0.3%	Rank history: #57 in FY2021, #71 in FY2022, #72 in FY2023, #60 in FY2024 and #46 in FY2025; up 19 since Jul 2024–Jun 2025.
39	Institute of Electrical & Electronics Engineers Inc. Top agencies MDA (DOD Missile Defense Agency) DISA (Defense Information Systems Agency)	$271,870	0.3%	Rank history: not on the FY2021–FY2023 lists, #47 in FY2024 and #27 in FY2025; down 7 since Jul 2024–Jun 2025.
40	Vlogic Systems, Inc. Top agencies VA (Department of Veterans Affairs)	$263,828	0.3%	Rank history: #55 in FY2021, #62 in FY2022, #65 in FY2023, #59 in FY2024 and #39 in FY2025; up 18 since Jul 2024–Jun 2025.
41	National Contract Management Association Top agencies Commerce (Department of Commerce) VA (Department of Veterans Affairs) Navy (Department of the Navy)	$261,630	0.3%	Rank history: #73 in FY2021, #58 in FY2022, #77 in FY2023, #51 in FY2024 and not on the FY2025 list; up 46 since Jul 2024–Jun 2025.
42	Ceati International Inc. Top agencies DOI (Department of the Interior) Army (Department of the Army)	$232,275	0.2%	Rank history: #58 in FY2021, #66 in FY2022, #66 in FY2023, #62 in FY2024 and #40 in FY2025; up 17 since Jul 2024–Jun 2025.
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, #70 in FY2024 and #43 in FY2025; up 28 since Jul 2024–Jun 2025.
44	America Movil Peru Sac Top agencies DOS (Department of State)	$214,239	0.2%	Rank history: not on the FY2021–FY2023 lists, #50 in FY2024 and #49 in FY2025; up 7 since Jul 2024–Jun 2025.
45	American Medical Informatics Association, Inc. Top agencies VA (Department of Veterans Affairs)	$213,200	0.2%	Rank history: not on the FY2021–FY2022 lists, #60 in FY2023, #53 in FY2024 and #38 in FY2025; up 7 since Jul 2024–Jun 2025.
46	Association of Small Business Development Centers Top agencies SBA (Small Business Administration)	$206,400	0.2%	Rank history: not on the FY2021 list, #88 in FY2022, #90 in FY2023, #88 in FY2024 and not on the FY2025 list; up 159 since Jul 2024–Jun 2025.
47	American Association for Laboratory Accreditation, Inc. Top agencies HHS (Department of Health and Human Services) USDA (Department of Agriculture) Army (Department of the Army)	$203,328	0.2%	Rank history: #95 in FY2021, #91 in FY2022, #92 in FY2023, #69 in FY2024 and #42 in FY2025; up 7 since Jul 2024–Jun 2025.
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, #71 in FY2024 and #48 in FY2025; up 24 since Jul 2024–Jun 2025.
49	American Society of Health-System Pharmacists Inc. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$145,156	0.1%	Rank history: #79 in FY2021, #82 in FY2022, #74 in FY2023, #73 in FY2024 and #51 in FY2025; up 25 since Jul 2024–Jun 2025.
50	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, #95 in FY2024 and #55 in FY2025; up 36 since Jul 2024–Jun 2025.
51	Information Technology Industry Council Inc. Top agencies Commerce (Department of Commerce) DISA (Defense Information Systems Agency)	$142,343	0.1%	Rank history: not on the FY2021–FY2023 lists, #89 in FY2024 and #80 in FY2025; up 30 since Jul 2024–Jun 2025.
52	Alliance for Telecommunications Industry Solutions Inc. Top agencies Commerce (Department of Commerce) DOJ (Department of Justice) OSD (Office of the Secretary of Defense)	$140,896	0.1%	Rank history: #82 in FY2021, #97 in FY2022, #96 in FY2023, #90 in FY2024 and #53 in FY2025; up 33 since Jul 2024–Jun 2025.
53	OASIS Open Top agencies DOJ (Department of Justice) DISA (Defense Information Systems Agency) Commerce (Department of Commerce)	$138,600	0.1%	Rank history: not on the FY2021–FY2023 lists, #82 in FY2024 and #41 in FY2025; up 3 since Jul 2024–Jun 2025.
54	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, #56 in FY2024 and #57 in FY2025; down 6 since Jul 2024–Jun 2025.
55	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, #81 in FY2024 and #60 in FY2025; up 28 since Jul 2024–Jun 2025.
56	University Corporation for Advanced Internet Development Top agencies Commerce (Department of Commerce) NSF (National Science Foundation) USUHS (DOD Uniformed Services University of the Health Sciences)	$127,402	0.1%	Rank history: #66 in FY2021, #98 in FY2022, #83 in FY2023, #65 in FY2024 and #54 in FY2025; up 22 since Jul 2024–Jun 2025.
57	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, #74 in FY2024 and #62 in FY2025; up 16 since Jul 2024–Jun 2025.
58	Agencia Europeia De Seguranca Maritima Top agencies DHS (Department of Homeland Security)	$119,349	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
59	Association for the Advancement of Medical Instrumentation Inc Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$113,878	0.1%	Rank history: not on the FY2021–FY2024 lists and #76 in FY2025; up 47 since Jul 2024–Jun 2025.
60	American Great Lakes Ports Association Inc. Top agencies DOT (Department of Transportation)	$110,000	0.1%	Rank history: not on the FY2021–FY2024 lists and #64 in FY2025; new, not ranked in Jul 2024–Jun 2025.
61	Health Level Seven International Inc. Top agencies HHS (Department of Health and Human Services) DHA (Defense Health Agency) VA (Department of Veterans Affairs)	$107,530	0.1%	Rank history: not on the FY2021–FY2024 lists and #66 in FY2025; up 42 since Jul 2024–Jun 2025.
62	Association for Clinical Pastoral Education Inc. Top agencies Army (Department of the Army) VA (Department of Veterans Affairs)	$107,356	0.1%	Rank history: not on the FY2021–FY2024 lists and #70 in FY2025; up 34 since Jul 2024–Jun 2025.
63	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, #100 in FY2024 and #68 in FY2025; up 32 since Jul 2024–Jun 2025.
64	Stichting Maritiem Research Instituut Nederland Top agencies Navy (Department of the Navy)	$102,600	0.1%	Rank history: not on the FY2021–FY2024 lists and #69 in FY2025; up 84 since Jul 2024–Jun 2025.
65	World 50 LLC Top agencies NASA (National Aeronautics and Space Administration)	$101,000	0.1%	Rank history: not on the FY2021–FY2024 lists and #71 in FY2025; up 146 since Jul 2024–Jun 2025.
66	Fitzpatrick Laurie Top agencies Army (Department of the Army)	$101,000	0.1%	Rank history: not on the FY2021–FY2024 lists and #75 in FY2025; up 39 since Jul 2024–Jun 2025.
67	Medical Center Alliance Top agencies VA (Department of Veterans Affairs)	$100,000	0.1%	Rank history: not on the FY2021–FY2024 lists and #72 in FY2025; up 32 since Jul 2024–Jun 2025.
68	American Academy of Physician Associates, Inc. Top agencies HHS (Department of Health and Human Services)	$100,000	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
69	National Council for Prescription Drug Programs Inc. Top agencies HHS (Department of Health and Human Services) DOL (Department of Labor)	$91,676	0.1%	Rank history: #60 in FY2021, #69 in FY2022, #86 in FY2023, #83 in FY2024 and #59 in FY2025; down 7 since Jul 2024–Jun 2025.
70	American National Standards Institute Incorporated Top agencies DHS (Department of Homeland Security) USAF (Department of the Air Force) USDA (Department of Agriculture)	$88,206	0.1%	Rank history: #91 in FY2021, #74 in FY2022, #44 in FY2023, #39 in FY2024 and #77 in FY2025; down 26 since Jul 2024–Jun 2025.
71	American Dental Assistants Association Top agencies DHA (Defense Health Agency)	$81,960	0.1%	Rank history: not on the FY2021–FY2024 lists and #83 in FY2025; up 39 since Jul 2024–Jun 2025.
72	National Commission On Correctional Health Care Top agencies DHS (Department of Homeland Security)	$80,996	0.1%	Rank history: not on the FY2021–FY2023 lists, #87 in FY2024 and #92 in FY2025; up 48 since Jul 2024–Jun 2025.
73	University System of Maryland Through University of Maryland, College Park Top agencies HHS (Department of Health and Human Services)	$80,000	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
74	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, #33 in FY2024 and #86 in FY2025; down 39 since Jul 2024–Jun 2025.
75	Atlas International Relocations Pvt. Ltd. Top agencies DOS (Department of State)	$76,707	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
76	Abms Solutions LLC Top agencies DOL (Department of Labor)	$76,570	0.1%	Rank history: not on the FY2021–FY2024 lists and #93 in FY2025; up 46 since Jul 2024–Jun 2025.
77	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, not on the FY2024 list and #87 in FY2025; new, not ranked in Jul 2024–Jun 2025.
78	American Geosciences Institute Top agencies DOI (Department of the Interior)	$75,000	0.1%	Rank history: not on the FY2021–FY2024 lists and #89 in FY2025; new, not ranked in Jul 2024–Jun 2025.
79	American Nurses Credentialing Center, Inc. A / K / A American Nurses Credentialing Center Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$74,208	0.1%	Rank history: not on the FY2021–FY2023 lists, #97 in FY2024 and #95 in FY2025; up 19 since Jul 2024–Jun 2025.
80	American Psychiatric Association Top agencies SSA (Social Security Administration)	$69,829	0.1%	Rank history: not on the FY2021–FY2024 lists and #88 in FY2025; up 37 since Jul 2024–Jun 2025.
81	Evidence Group LLC Top agencies DOS (Department of State)	$68,320	0.1%	Rank history: not on the FY2021–FY2024 lists and #98 in FY2025; new, not ranked in Jul 2024–Jun 2025.
82	American Chemical Society Top agencies Navy (Department of the Navy)	$67,623	0.1%	Rank history: not on the FY2021–FY2024 lists and #100 in FY2025; up 51 since Jul 2024–Jun 2025.
83	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 and #99 in FY2025; up 85 since Jul 2024–Jun 2025.
84	Toyota Gibraltar Stockholdings Ltd Top agencies DOS (Department of State)	$67,365	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
85	Association of Research Libraries Top agencies USDA (Department of Agriculture) HHS (Department of Health and Human Services)	$63,684	0.1%	Rank history: not on the FY2021–FY2023 lists, #94 in FY2024 and not on the FY2025 list; up 50 since Jul 2024–Jun 2025.
86	BFP Enterprises LLC Top agencies DOJ (Department of Justice)	$63,000	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
87	Joint Commission Resources, Inc. Top agencies VA (Department of Veterans Affairs)	$62,900	0.1%	Rank history: not on the FY2021–FY2025 lists; up 131 since Jul 2024–Jun 2025.
88	Aaalac International Top agencies HHS (Department of Health and Human Services)	$61,182	0.1%	Rank history: not on the FY2021–FY2025 lists; up 105 since Jul 2024–Jun 2025.
89	BSK Consulting LLC Top agencies DHS (Department of Homeland Security)	$61,001	0.1%	Rank history: not on the FY2021–FY2025 lists; up 160 since Jul 2024–Jun 2025.
90	American Astronautical Society Inc. Top agencies NASA (National Aeronautics and Space Administration)	$61,000	0.1%	Rank history: not on the FY2021–FY2025 lists; up 62 since Jul 2024–Jun 2025.
91	Association of National Advertisers, Inc. Top agencies Army (Department of the Army)	$60,320	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
92	Ass Mondiale De La Route Top agencies DOT (Department of Transportation)	$60,100	0.1%	Rank history: not on the FY2021–FY2022 lists, #67 in FY2023, not on the FY2024 list and #91 in FY2025; up 27 since Jul 2024–Jun 2025.
93	The American Institute of Architects Top agencies GSA (General Services Administration)	$60,000	0.1%	Rank history: not on the FY2021–FY2024 lists and #85 in FY2025; up 22 since Jul 2024–Jun 2025.
94	Battelle Memorial Institute Top agencies NASA (National Aeronautics and Space Administration)	$60,000	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
95	American Dental Association Top agencies HHS (Department of Health and Human Services)	$60,000	0.1%	Rank history: not on the FY2021–FY2024 lists and #79 in FY2025; up 12 since Jul 2024–Jun 2025.
96	Association of Certified Fraud Examiners, Inc. Top agencies Navy (Department of the Navy)	$58,360	0.1%	Rank history: not on the FY2021–FY2025 lists; up 195 since Jul 2024–Jun 2025.
97	Danchini Aero Top agencies DOI (Department of the Interior)	$55,502	0.1%	Rank history: not on the FY2021–FY2025 lists; up 165 since Jul 2024–Jun 2025.
98	International Union of Forest Research Organizations Top agencies USDA (Department of Agriculture)	$53,661	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
99	Hospital Association of Southern California Top agencies VA (Department of Veterans Affairs)	$52,848	0.1%	Rank history: not on the FY2021–FY2025 lists; up 67 since Jul 2024–Jun 2025.
100	Southwest Texas Regional Advisory Council Top agencies DHA (Defense Health Agency)	$52,332	0.1%	Rank history: not on the FY2021–FY2024 lists and #63 in FY2025; down 9 since Jul 2024–Jun 2025.

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100 of 228 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 8139

Code	Net obligations	Largest contractor
81392 Professional Organizations	$86,957,710	General Dynamics Corporation
81391 Business Associations	$3,054,992	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 $101 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.
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 Jul 2024–Jun 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

Who were the top 10 NAICS 8139 contractors in Jul 2025–Jun 2026?

1. General Dynamics Corporation ($27.1M), 2. Joint Commission On Accreditation of Healthcare Organizations ($11.7M), 3. Quality Insights, Inc. ($10.4M), 4. National Association for Public Health Statistics and Information Systems, Inc. ($2.6M), 5. Sae International ($2.28M), 6. Maximus Federal Services, Inc. ($2.07M), 7. Center for Energy Workforce Development ($1.98M), 8. American College of Surgeons ($1.77M), 9. Nevada System of Higher Education ($1.76M), 10. Provider Resources Inc ($1.67M).

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