Top 100 Contractors in PSC B506: Data Analysis (other than scientific), Aug 2025–Jul 2026

Name: Top 100 Contractors in PSC B506: Data Analysis (other than scientific), Aug 2025–Jul 2026
Creator: GovTribe
License: https://creativecommons.org/licenses/by/4.0/

Parent companies by net contract obligations Aug 1, 2025 – Jul 31, 2026 Code page on GovTribe

The latest 12 months. See the newest fiscal year's list: Top Contractors in PSC B506: Data Analysis (other than scientific), FY2025.

The top 10 won 62% of PSC B506 contract dollars from August 2025 through July 2026

Contract obligations: $280,316,823 Net of deobligations, by contracts coded PSC B506
Contractors: 129 Parent companies with an obligation
Largest contractor: Westat, Inc. $59.8 million, 19.0% of obligations
Data as of: Nov 5, 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	Westat, Inc. 2 awardees Top agencies ED (Department of Education)	$59,842,592	19.0%	Rank history: #59 in FY2021, not on the FY2022 list, #14 in FY2023, #15 in FY2024 and #2 in FY2025; up 1 since Aug 2024–Jul 2025.
2	Educational Testing Service Top agencies ED (Department of Education)	$47,283,768	15.0%	Rank history: #1 in FY2021, #1 in FY2022, #1 in FY2023, #1 in FY2024 and #1 in FY2025; down 1 since Aug 2024–Jul 2025.
3	Technomics Inc. Top agencies DOE (Department of Energy)	$15,501,926	4.9%	Rank history: not on the FY2021–FY2023 lists, #5 in FY2024 and #5 in FY2025; up 1 since Aug 2024–Jul 2025.
4	Rpi-Css, LLC Top agencies Commerce (Department of Commerce)	$15,315,627	4.9%	Rank history: not on the FY2021–FY2024 lists and #3 in FY2025; up 114 since Aug 2024–Jul 2025.
5	ASR Analytics, LLC Top agencies Treasury (Department of the Treasury)	$12,471,885	4.0%	Rank history: #3 in FY2021, #2 in FY2022, #2 in FY2023, #2 in FY2024 and #4 in FY2025; down 2 since Aug 2024–Jul 2025.
6	General Dynamics Corporation Through General Dynamics Information Technology, Inc. Top agencies HHS (Department of Health and Human Services)	$10,876,092	3.5%	Rank history: not on the FY2021–FY2022 lists, #6 in FY2023, #4 in FY2024 and #7 in FY2025; down 1 since Aug 2024–Jul 2025.
7	Kbr, Inc. Through Linquest Corporation Top agencies USAF (Department of the Air Force)	$9,858,621	3.1%	Rank history: not on the FY2021–FY2024 lists and #12 in FY2025; new, not ranked in Aug 2024–Jul 2025.
8	Tecolote Research, Inc. Top agencies OSD (Office of the Secretary of Defense)	$8,891,308	2.8%	Rank history: #17 in FY2021, #16 in FY2022, #9 in FY2023, #11 in FY2024 and #6 in FY2025; up 1 since Aug 2024–Jul 2025.
9	Pearson PLC Through NCS Pearson Inc. Top agencies ED (Department of Education)	$7,277,746	2.3%	Rank history: not on the FY2021–FY2024 lists and #21 in FY2025; up 14 since Aug 2024–Jul 2025.
10	Booz Allen Hamilton Holding Corporation Through Booz Allen Hamilton Inc. Top agencies DHS (Department of Homeland Security)	$6,905,351	2.2%	Rank history: #14 in FY2021, #19 in FY2022, #29 in FY2023, #13 in FY2024 and #15 in FY2025; up 2 since Aug 2024–Jul 2025.
11	Everfox LLC Top agencies USAF (Department of the Air Force)	$6,500,309	2.1%	Rank history: not on the FY2021–FY2024 lists and #9 in FY2025; new, not ranked in Aug 2024–Jul 2025.
12	The Medical College of Wisconsin, Inc. Top agencies HHS (Department of Health and Human Services)	$6,041,662	1.9%	Rank history: #6 in FY2021, #7 in FY2022, #10 in FY2023, #12 in FY2024 and #10 in FY2025; down 2 since Aug 2024–Jul 2025.
13	Research Triangle Institute Top agencies HHS (Department of Health and Human Services) USDA (Department of Agriculture)	$5,762,123	1.8%	Rank history: #5 in FY2021, #5 in FY2022, #5 in FY2023, #8 in FY2024 and #11 in FY2025; down 2 since Aug 2024–Jul 2025.
14	Excella, LLC Top agencies OPM (Office of Personnel Management)	$5,384,186	1.7%	Rank history: not on the FY2021–FY2023 lists, #6 in FY2024 and #8 in FY2025; down 7 since Aug 2024–Jul 2025.
15	Redhorse Corporation Top agencies USAF (Department of the Air Force)	$4,347,550	1.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
16	Dynamic-Pro Inc. Top agencies Treasury (Department of the Treasury)	$4,205,582	1.3%	Rank history: not on the FY2021–FY2022 lists, #15 in FY2023, #10 in FY2024 and #17 in FY2025; new, not ranked in Aug 2024–Jul 2025.
17	Deloitte Through Deloitte Consulting LLP Top agencies Treasury (Department of the Treasury)	$4,042,882	1.3%	Rank history: not on the FY2021–FY2023 lists, #3 in FY2024 and #13 in FY2025; down 11 since Aug 2024–Jul 2025.
18	Telemus Group LLC Top agencies OSD (Office of the Secretary of Defense) WHS (DOD Washington Headquarters Service)	$3,824,702	1.2%	Rank history: not on the FY2021–FY2022 lists, #41 in FY2023, #35 in FY2024 and #18 in FY2025; up 9 since Aug 2024–Jul 2025.
19	Analytica LLC Top agencies HHS (Department of Health and Human Services) Treasury (Department of the Treasury)	$3,750,977	1.2%	Rank history: #13 in FY2021, #11 in FY2022, #18 in FY2023, #18 in FY2024 and #16 in FY2025; down 1 since Aug 2024–Jul 2025.
20	Oasys International LLC Top agencies FCC (Federal Communications Commission)	$3,543,320	1.1%	Rank history: not on the FY2021–FY2022 lists, #17 in FY2023, #16 in FY2024 and #19 in FY2025; down 6 since Aug 2024–Jul 2025.
21	Four LLC Top agencies Commerce (Department of Commerce)	$2,999,818	1.0%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
22	Baron Public Affairs LLC Top agencies WHS (DOD Washington Headquarters Service) OSD (Office of the Secretary of Defense)	$2,335,322	0.7%	Rank history: #98 in FY2021, #55 in FY2022, #19 in FY2023, #17 in FY2024 and #28 in FY2025; up 18 since Aug 2024–Jul 2025.
23	Leidos Holdings, Inc. Through Leidos, Inc. Top agencies WHS (DOD Washington Headquarters Service) OSD (Office of the Secretary of Defense)	$2,135,814	0.7%	Rank history: not on the FY2021 list, #25 in FY2022, #26 in FY2023, #28 in FY2024 and #29 in FY2025; up 34 since Aug 2024–Jul 2025.
24	Assertive Professionals LLC Top agencies DOT (Department of Transportation)	$2,075,272	0.7%	Rank history: not on the FY2021–FY2023 lists, #20 in FY2024 and #22 in FY2025; down 7 since Aug 2024–Jul 2025.
25	Specpro Sustainment and Environmental, LLC Top agencies USAF (Department of the Air Force)	$2,056,036	0.7%	Rank history: not on the FY2021–FY2024 lists and #25 in FY2025; down 1 since Aug 2024–Jul 2025.
26	National Presto Industries Inc. Through Amtec Corporation Top agencies Army (Department of the Army)	$2,000,000	0.6%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
27	Advanced LAN Techs Inc. Top agencies WHS (DOD Washington Headquarters Service) OSD (Office of the Secretary of Defense)	$1,963,164	0.6%	Rank history: #48 in FY2021, #38 in FY2022, #35 in FY2023, #47 in FY2024 and #39 in FY2025; new, not ranked in Aug 2024–Jul 2025.
28	Robert D. Niehaus, Inc. Top agencies DHRA (Defense Human Resources Activity)	$1,934,540	0.6%	Rank history: #21 in FY2021, #22 in FY2022, #23 in FY2023, #31 in FY2024 and #27 in FY2025; down 3 since Aug 2024–Jul 2025.
29	Truveta Inc Top agencies HHS (Department of Health and Human Services)	$1,929,996	0.6%	Rank history: not on the FY2021–FY2022 lists, #11 in FY2023, not on the FY2024 list and #14 in FY2025; down 16 since Aug 2024–Jul 2025.
30	Stratevarious Inc. Top agencies OSD (Office of the Secretary of Defense) WHS (DOD Washington Headquarters Service)	$1,908,321	0.6%	Rank history: not on the FY2021 list, #48 in FY2022, #21 in FY2023, #25 in FY2024 and #26 in FY2025; down 1 since Aug 2024–Jul 2025.
31	Yale Univ Top agencies VA (Department of Veterans Affairs)	$1,809,073	0.6%	Rank history: not on the FY2021–FY2022 lists, #78 in FY2023, not on the FY2024 list and #31 in FY2025; up 5 since Aug 2024–Jul 2025.
32	Dynamis, Inc. Top agencies OSD (Office of the Secretary of Defense)	$1,697,732	0.5%	Rank history: #31 in FY2021, #36 in FY2022, #20 in FY2023, #22 in FY2024 and #47 in FY2025; down 16 since Aug 2024–Jul 2025.
33	Long Term Strategy Group, LLC Top agencies OSD (Office of the Secretary of Defense) WHS (DOD Washington Headquarters Service)	$1,612,591	0.5%	Rank history: not on the FY2021–FY2022 lists, #60 in FY2023, #46 in FY2024 and #41 in FY2025; up 10 since Aug 2024–Jul 2025.
34	The Boeing Company Top agencies USAF (Department of the Air Force)	$1,553,998	0.5%	Rank history: not on the FY2021 list, #46 in FY2022, not on the FY2023–FY2024 lists and #32 in FY2025; new, not ranked in Aug 2024–Jul 2025.
35	Anomaly 6 LLC Top agencies Army (Department of the Army)	$1,500,000	0.5%	Rank history: not on the FY2021–FY2024 lists and #33 in FY2025; new, not ranked in Aug 2024–Jul 2025.
36	University System of Maryland Through University of Maryland, College Park Top agencies DOT (Department of Transportation)	$1,398,000	0.4%	Rank history: #57 in FY2021, #29 in FY2022, #31 in FY2023, #30 in FY2024 and #34 in FY2025; new, not ranked in Aug 2024–Jul 2025.
37	Weris, Inc. Top agencies DHS (Department of Homeland Security)	$1,387,515	0.4%	Rank history: #61 in FY2021, #52 in FY2022, #52 in FY2023, #54 in FY2024 and #54 in FY2025; new, not ranked in Aug 2024–Jul 2025.
38	Fearless Solutions, LLC Top agencies GSA (General Services Administration)	$1,235,274	0.4%	Rank history: not on the FY2021–FY2023 lists, #33 in FY2024 and #38 in FY2025; down 12 since Aug 2024–Jul 2025.
39	Center for Strategic and Budgetary Assessments Top agencies OSD (Office of the Secretary of Defense) WHS (DOD Washington Headquarters Service)	$1,161,502	0.4%	Rank history: #69 in FY2021, #67 in FY2022, not on the FY2023 list, #41 in FY2024 and #36 in FY2025; down 6 since Aug 2024–Jul 2025.
40	Mission-Insights LLC Top agencies Treasury (Department of the Treasury)	$1,153,095	0.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
41	Applied Research Associates, Inc. Top agencies USAF (Department of the Air Force)	$999,288	0.3%	Rank history: #83 in FY2021, #54 in FY2022, not on the FY2023 list, #39 in FY2024 and #42 in FY2025; unchanged since Aug 2024–Jul 2025.
42	Ice Mortgage Technology Inc. 2 awardees, including Black Knight Data & Analytics LLC Top agencies HUD (Department of Housing and Urban Development) CFPB (Consumer Financial Protection Bureau) Treasury (Department of the Treasury)	$980,875	0.3%	Rank history: not on the FY2021–FY2024 lists and #45 in FY2025; up 42 since Aug 2024–Jul 2025.
43	Integrated Financial Engineering Inc. Top agencies HUD (Department of Housing and Urban Development) USDA (Department of Agriculture)	$973,801	0.3%	Rank history: #51 in FY2021, #61 in FY2022, #53 in FY2023, #37 in FY2024 and #44 in FY2025; down 4 since Aug 2024–Jul 2025.
44	Moody'S Corporation Through Moody's Analytics, Inc. Top agencies HUD (Department of Housing and Urban Development)	$969,687	0.3%	Rank history: not on the FY2021–FY2023 lists, #27 in FY2024 and #43 in FY2025; unchanged since Aug 2024–Jul 2025.
45	Green Cell Consulting LLC Top agencies DOD (Department of Defense) Navy (Department of the Navy)	$951,647	0.3%	Rank history: #42 in FY2021, #62 in FY2022, #55 in FY2023, #58 in FY2024 and #69 in FY2025; up 9 since Aug 2024–Jul 2025.
46	National Association for Public Health Statistics and Information Systems, Inc. Top agencies SSA (Social Security Administration)	$880,092	0.3%	Rank history: not on the FY2021–FY2023 lists, #40 in FY2024 and #46 in FY2025; down 1 since Aug 2024–Jul 2025.
47	Alex-Alternative Experts, LLC Top agencies Navy (Department of the Navy)	$749,929	0.2%	Rank history: #41 in FY2021, #20 in FY2022, #28 in FY2023, #29 in FY2024 and #63 in FY2025; new, not ranked in Aug 2024–Jul 2025.
48	Kaia Inc. Top agencies EAC (US Election Assistance Commission)	$747,000	0.2%	Rank history: not on the FY2021–FY2024 lists and #49 in FY2025; new, not ranked in Aug 2024–Jul 2025.
49	Rubicon Planning, LLC Top agencies USSOCOM (United States Special Operations Command)	$713,481	0.2%	Rank history: #88 in FY2021, not on the FY2022–FY2023 lists, #87 in FY2024 and #51 in FY2025; up 24 since Aug 2024–Jul 2025.
50	BLN Fors Marsh JV LLC Top agencies EAC (US Election Assistance Commission)	$706,708	0.2%	Rank history: not on the FY2021–FY2024 lists and #71 in FY2025; new, not ranked in Aug 2024–Jul 2025.
51	Center for Strategic & International Studies Inc. Top agencies WHS (DOD Washington Headquarters Service) OSD (Office of the Secretary of Defense)	$690,545	0.2%	Rank history: #74 in FY2021, #88 in FY2022, #49 in FY2023, #44 in FY2024 and #35 in FY2025; down 19 since Aug 2024–Jul 2025.
52	Eastern Research Group Inc. Top agencies HHS (Department of Health and Human Services)	$597,843	0.2%	Rank history: #50 in FY2021, #43 in FY2022, #44 in FY2023, #73 in FY2024 and #53 in FY2025; down 2 since Aug 2024–Jul 2025.
53	Sos International LLC Through Exovera LLC Top agencies WHS (DOD Washington Headquarters Service)	$594,538	0.2%	Rank history: not on the FY2021–FY2022 lists, #42 in FY2023, #52 in FY2024 and #55 in FY2025; new, not ranked in Aug 2024–Jul 2025.
54	The Gordian Group, Inc. 2 awardees Top agencies DOE (Department of Energy)	$577,201	0.2%	Rank history: not on the FY2021–FY2023 lists, #42 in FY2024 and #30 in FY2025; down 12 since Aug 2024–Jul 2025.
55	Gairloch LLC Top agencies WHS (DOD Washington Headquarters Service)	$565,500	0.2%	Rank history: not on the FY2021–FY2024 lists and #77 in FY2025; new, not ranked in Aug 2024–Jul 2025.
56	Semantic AI, Inc. Top agencies USAF (Department of the Air Force)	$555,000	0.2%	Rank history: #80 in FY2021, #44 in FY2022, #39 in FY2023, #21 in FY2024 and #24 in FY2025; down 34 since Aug 2024–Jul 2025.
57	The Rand Corporation Top agencies DHS (Department of Homeland Security)	$510,529	0.2%	Rank history: not on the FY2021 list, #86 in FY2022, not on the FY2023 list, #45 in FY2024 and #52 in FY2025; down 20 since Aug 2024–Jul 2025.
58	Lexisnexis Special Services Inc Top agencies DOS (Department of State)	$508,085	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
59	JY Advisory LLC Top agencies EAC (US Election Assistance Commission)	$484,165	0.2%	Rank history: not on the FY2021–FY2024 lists and #61 in FY2025; new, not ranked in Aug 2024–Jul 2025.
60	Logistics Management Institute Top agencies OSD (Office of the Secretary of Defense)	$482,141	0.2%	Rank history: #15 in FY2021, #33 in FY2022, #68 in FY2023, #62 in FY2024 and #62 in FY2025; unchanged since Aug 2024–Jul 2025.
61	Corelogic Solutions, LLC Top agencies USDA (Department of Agriculture)	$475,074	0.2%	Rank history: not on the FY2021–FY2023 lists, #82 in FY2024 and #74 in FY2025; up 21 since Aug 2024–Jul 2025.
62	National Cyber-Forensics and Training Alliance Limited Top agencies DHS (Department of Homeland Security)	$406,000	0.1%	Rank history: #70 in FY2021, #72 in FY2022, #71 in FY2023, #72 in FY2024 and #64 in FY2025; up 1 since Aug 2024–Jul 2025.
63	Lone Pine Geoeconomics Inc. Top agencies OSD (Office of the Secretary of Defense)	$389,450	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
64	Nonproliferation Policy Education Center, Inc. Top agencies OSD (Office of the Secretary of Defense) WHS (DOD Washington Headquarters Service)	$387,671	0.1%	Rank history: not on the FY2021–FY2023 lists, #99 in FY2024 and #84 in FY2025; new, not ranked in Aug 2024–Jul 2025.
65	Kynetec USA Inc. Top agencies DOI (Department of the Interior)	$380,444	0.1%	Rank history: not on the FY2021–FY2024 lists and #66 in FY2025; up 12 since Aug 2024–Jul 2025.
66	Petronerds LLC Top agencies OSD (Office of the Secretary of Defense)	$372,660	0.1%	Rank history: not on the FY2021–FY2024 lists and #65 in FY2025; down 1 since Aug 2024–Jul 2025.
67	Strategicit Solutions LLC Top agencies HUD (Department of Housing and Urban Development)	$356,924	0.1%	Rank history: not on the FY2021–FY2023 lists, #51 in FY2024 and #67 in FY2025; new, not ranked in Aug 2024–Jul 2025.
68	The Marathon Initiative Top agencies WHS (DOD Washington Headquarters Service)	$342,611	0.1%	Rank history: not on the FY2021 list, #98 in FY2022, not on the FY2023–FY2024 lists and #68 in FY2025; new, not ranked in Aug 2024–Jul 2025.
69	Unified Industries Incorporated Top agencies Navy (Department of the Navy)	$324,655	0.1%	Rank history: not on the FY2021–FY2023 lists, #78 in FY2024 and #70 in FY2025; down 1 since Aug 2024–Jul 2025.
70	Veson Nautical LLC Top agencies DOT (Department of Transportation)	$322,525	0.1%	Rank history: not on the FY2021–FY2024 lists and #80 in FY2025; down 9 since Aug 2024–Jul 2025.
71	Kosiak Consulting, L.L.C. Top agencies WHS (DOD Washington Headquarters Service) OSD (Office of the Secretary of Defense)	$310,760	0.1%	Rank history: not on the FY2021–FY2024 lists and #85 in FY2025; new, not ranked in Aug 2024–Jul 2025.
72	Deloitte Financial Advisory Services LLP Through Deloitte Consulting LLP Top agencies OSD (Office of the Secretary of Defense)	$309,793	0.1%	Rank history: #2 in FY2021, #6 in FY2022, #8 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
73	Matrix Design Group, Inc. Top agencies VA (Department of Veterans Affairs)	$273,377	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
74	GRA Inc. Top agencies DOT (Department of Transportation)	$255,828	0.1%	Rank history: #86 in FY2021, #68 in FY2022, #54 in FY2023, #14 in FY2024 and not on the FY2025 list; down 59 since Aug 2024–Jul 2025.
75	Perceptum LLC Top agencies OSD (Office of the Secretary of Defense)	$250,040	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
76	Cloud Nine Alliance LLC Top agencies HUD (Department of Housing and Urban Development)	$246,261	0.1%	Rank history: not on the FY2021–FY2023 lists, #71 in FY2024 and #72 in FY2025; down 28 since Aug 2024–Jul 2025.
77	S&P Global Inc. Top agencies Treasury (Department of the Treasury)	$245,578	0.1%	Rank history: not on the FY2021–FY2023 lists, #88 in FY2024 and #75 in FY2025; up 27 since Aug 2024–Jul 2025.
78	Stell Environmental Enterprises Inc. Top agencies Army (Department of the Army)	$237,712	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
79	Auffant Tahtinen Analysis LLC Top agencies WHS (DOD Washington Headquarters Service)	$225,000	0.1%	Rank history: not on the FY2021–FY2024 lists and #81 in FY2025; new, not ranked in Aug 2024–Jul 2025.
80	Thayer LLC Top agencies OSD (Office of the Secretary of Defense) WHS (DOD Washington Headquarters Service)	$219,000	0.1%	Rank history: not on the FY2021–FY2023 lists, #91 in FY2024 and #92 in FY2025; up 7 since Aug 2024–Jul 2025.
81	The Regents of the University of Colorado Top agencies Army (Department of the Army)	$199,999	0.1%	Rank history: not on the FY2021–FY2024 lists and #82 in FY2025; new, not ranked in Aug 2024–Jul 2025.
82	Horizon Advisory Partners LLC Top agencies OSD (Office of the Secretary of Defense)	$176,400	0.1%	Rank history: not on the FY2021–FY2024 lists and #86 in FY2025; down 4 since Aug 2024–Jul 2025.
83	The Hill Group Inc. Top agencies HHS (Department of Health and Human Services)	$165,440	0.1%	Rank history: not on the FY2021–FY2022 lists, #95 in FY2023, #68 in FY2024 and #89 in FY2025; down 2 since Aug 2024–Jul 2025.
84	Nexight Group LLC Top agencies DHS (Department of Homeland Security)	$161,097	0.1%	Rank history: not on the FY2021–FY2024 lists and #87 in FY2025; new, not ranked in Aug 2024–Jul 2025.
85	IHS Global Inc 3 awardees, including R.l. Polk & Co and Markit North America Inc. Top agencies DOS (Department of State) SEC (Securities and Exchange Commission) DOT (Department of Transportation)	$154,269	<0.1%	Rank history: not on the FY2021–FY2024 lists and #79 in FY2025; down 18 since Aug 2024–Jul 2025.
86	Freightwaves Inc. Top agencies DOT (Department of Transportation)	$150,000	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
87	Ice Data Services, Inc. Top agencies CFPB (Consumer Financial Protection Bureau) HUD (Department of Housing and Urban Development)	$146,000	<0.1%	Rank history: not on the FY2021–FY2024 lists and #90 in FY2025; up 16 since Aug 2024–Jul 2025.
88	Mitchell Consulting Services Group Inc Top agencies HHS (Department of Health and Human Services)	$141,069	<0.1%	Rank history: not on the FY2021–FY2025 lists; up 6 since Aug 2024–Jul 2025.
89	Above Group Inc. Top agencies VA (Department of Veterans Affairs)	$140,466	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
90	Colossus, Incorporated Top agencies DOS (Department of State)	$140,188	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
91	The Rockefeller University Top agencies OSD (Office of the Secretary of Defense)	$126,389	<0.1%	Rank history: not on the FY2021–FY2023 lists, #65 in FY2024 and #60 in FY2025; down 33 since Aug 2024–Jul 2025.
92	Potomacwave, Inc. Top agencies Treasury (Department of the Treasury)	$118,800	<0.1%	Rank history: #93 in FY2021, #91 in FY2022, not on the FY2023–FY2024 lists and #78 in FY2025; down 7 since Aug 2024–Jul 2025.
93	Universiteit Hasselt Top agencies DOT (Department of Transportation)	$115,000	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
94	Ipsos Public Affairs, LLC Top agencies DOS (Department of State)	$92,539	<0.1%	Rank history: not on the FY2021–FY2024 lists and #94 in FY2025; new, not ranked in Aug 2024–Jul 2025.
95	West Publishing Corporation Top agencies HUD (Department of Housing and Urban Development)	$89,316	<0.1%	Rank history: not on the FY2021–FY2024 lists and #96 in FY2025; down 2 since Aug 2024–Jul 2025.
96	Mostafa Shawki Office for Accounting and Auditing Top agencies DOS (Department of State)	$88,507	<0.1%	Rank history: not on the FY2021–FY2024 lists and #97 in FY2025; new, not ranked in Aug 2024–Jul 2025.
97	Freddy Grover Mercado Jimenez Top agencies DOI (Department of the Interior)	$71,000	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
98	Samsung Electronics Co.,Ltd. Through Circana, LLC Top agencies Treasury (Department of the Treasury)	$67,804	<0.1%	Rank history: not on the FY2021–FY2024 lists and #98 in FY2025; unchanged since Aug 2024–Jul 2025.
99	Isentia PTY Limited Top agencies DOS (Department of State)	$67,024	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
100	Kanati Solutions LLC Top agencies VA (Department of Veterans Affairs)	$56,237	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.

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100 of 129 contractors listed here. See the rest on GovTribe.

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 $314 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. 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

Who were the top 10 PSC B506 contractors in Aug 2025–Jul 2026?

1. Westat, Inc. ($59.8M), 2. Educational Testing Service ($47.3M), 3. Technomics Inc. ($15.5M), 4. Rpi-Css, LLC ($15.3M), 5. ASR Analytics, LLC ($12.5M), 6. General Dynamics Corporation ($10.9M), 7. Kbr, Inc. ($9.86M), 8. Tecolote Research, Inc. ($8.89M), 9. Pearson PLC ($7.28M), 10. Booz Allen Hamilton Holding Corporation ($6.91M).

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