Top 100 Contractors in PSC B529: Scientific Data Studies, Jul 2025–Jun 2026

Name: Top 100 Contractors in PSC B529: Scientific Data Studies, 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 60% of PSC B529 contract dollars from July 2025 through June 2026

Contract obligations: $142,060,017 Net of deobligations, by contracts coded PSC B529
Contractors: 261 Parent companies with an obligation
Largest contractor: ManTech International Corporation $24.9 million, 15.5% 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	ManTech International Corporation Through Mantech Advanced Systems International, Inc. Top agencies USAF (Department of the Air Force) DHA (Defense Health Agency)	$24,865,444	15.5%	Rank history: not on the FY2021–FY2023 lists, #90 in FY2024 and #1 in FY2025; unchanged since Jul 2024–Jun 2025.
2	Deloitte Through Deloitte Consulting LLP Top agencies HHS (Department of Health and Human Services)	$12,080,593	7.5%	Rank history: not on the FY2021–FY2023 lists, #91 in FY2024 and #5 in FY2025; up 108 since Jul 2024–Jun 2025.
3	Great Hill Solutions, LLC Top agencies HHS (Department of Health and Human Services)	$11,650,469	7.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
4	Mccrone Associates Inc. Top agencies USAF (Department of the Air Force)	$10,672,279	6.6%	Rank history: not on the FY2021–FY2024 lists and #4 in FY2025; unchanged since Jul 2024–Jun 2025.
5	Iqvia Government Solutions Inc Top agencies HHS (Department of Health and Human Services)	$10,455,912	6.5%	Rank history: not on the FY2021–FY2023 lists, #1 in FY2024 and #3 in FY2025; down 3 since Jul 2024–Jun 2025.
6	Source Healthcare Analytics LLC 2 awardees Top agencies HHS (Department of Health and Human Services)	$7,663,180	4.8%	Rank history: not on the FY2021–FY2022 lists, #12 in FY2023, #10 in FY2024 and #11 in FY2025; up 27 since Jul 2024–Jun 2025.
7	Information Management Services, Inc. Top agencies HHS (Department of Health and Human Services)	$5,140,327	3.2%	Rank history: #4 in FY2021, #3 in FY2022, #3 in FY2023, #5 in FY2024 and #7 in FY2025; up 2 since Jul 2024–Jun 2025.
8	Teledyne Technologies Incorporated Through Teledyne Brown Engineering, Inc. Top agencies USAF (Department of the Air Force)	$4,989,078	3.1%	Rank history: not on the FY2021–FY2024 lists and #53 in FY2025; up 51 since Jul 2024–Jun 2025.
9	Gryphon Technologies L.C. Top agencies USAF (Department of the Air Force)	$4,835,549	3.0%	Rank history: not on the FY2021–FY2023 lists, #54 in FY2024 and #10 in FY2025; up 3 since Jul 2024–Jun 2025.
10	Research Triangle Institute Top agencies NSF (National Science Foundation) HHS (Department of Health and Human Services)	$4,398,663	2.7%	Rank history: not on the FY2021 list, #10 in FY2022, #15 in FY2023, #4 in FY2024 and #8 in FY2025; down 3 since Jul 2024–Jun 2025.
11	Chenega Government Mission Solutions, LLC Top agencies HHS (Department of Health and Human Services)	$2,673,473	1.7%	Rank history: not on the FY2021–FY2023 lists, #16 in FY2024 and #12 in FY2025; up 5 since Jul 2024–Jun 2025.
12	Washington State University Top agencies DOE (Department of Energy) DOI (Department of the Interior)	$2,328,985	1.4%	Rank history: #66 in FY2021, #21 in FY2022, #55 in FY2023, #15 in FY2024 and #17 in FY2025; up 145 since Jul 2024–Jun 2025.
13	GDA Corp Top agencies USDA (Department of Agriculture)	$2,191,400	1.4%	Rank history: not on the FY2021–FY2024 lists and #27 in FY2025; new, not ranked in Jul 2024–Jun 2025.
14	@Orchard LLC Top agencies Commerce (Department of Commerce)	$2,104,340	1.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
15	Bowhead Enterprise, Science and Technology, LLC Top agencies Army (Department of the Army)	$1,943,627	1.2%	Rank history: not on the FY2021–FY2023 lists, #44 in FY2024 and #15 in FY2025; up 6 since Jul 2024–Jun 2025.
16	Goldbelt Professional Services, LLC Top agencies HHS (Department of Health and Human Services)	$1,826,021	1.1%	Rank history: not on the FY2021–FY2023 lists, #24 in FY2024 and #18 in FY2025; up 9 since Jul 2024–Jun 2025.
17	Ntvi Solutions, LLC Top agencies Commerce (Department of Commerce)	$1,779,441	1.1%	Rank history: not on the FY2021–FY2024 lists and #20 in FY2025; up 25 since Jul 2024–Jun 2025.
18	University of Texas At Austin Top agencies NASA (National Aeronautics and Space Administration) DOI (Department of the Interior)	$1,592,222	1.0%	Rank history: not on the FY2021 list, #48 in FY2022, not on the FY2023–FY2024 lists and #23 in FY2025; up 32 since Jul 2024–Jun 2025.
19	Brigham & Womens Hospital Inc Top agencies HHS (Department of Health and Human Services)	$1,478,465	0.9%	Rank history: #16 in FY2021, #20 in FY2022, #29 in FY2023, #50 in FY2024 and #21 in FY2025; unchanged since Jul 2024–Jun 2025.
20	ICF Macro Inc. Top agencies NSF (National Science Foundation)	$1,430,797	0.9%	Rank history: not on the FY2021–FY2023 lists, #36 in FY2024 and #22 in FY2025; new, not ranked in Jul 2024–Jun 2025.
21	Michigan Public Health Institute Top agencies HHS (Department of Health and Human Services)	$1,200,000	0.7%	Rank history: #29 in FY2021, #25 in FY2022, #31 in FY2023, #32 in FY2024 and #25 in FY2025; up 10 since Jul 2024–Jun 2025.
22	Leidos Holdings, Inc. Through Leidos, Inc. Top agencies USAF (Department of the Air Force)	$1,181,790	0.7%	Rank history: #20 in FY2021, #22 in FY2022, #30 in FY2023, #33 in FY2024 and #26 in FY2025; new, not ranked in Jul 2024–Jun 2025.
23	Environmental Systems Research Institute, Inc. Top agencies DHS (Department of Homeland Security)	$1,108,316	0.7%	Rank history: not on the FY2021–FY2023 lists, #30 in FY2024 and not on the FY2025 list; up 5 since Jul 2024–Jun 2025.
24	Ixblue Inc Through Exail Inc. Top agencies Commerce (Department of Commerce)	$1,027,430	0.6%	Rank history: not on the FY2021–FY2023 lists, #66 in FY2024 and #43 in FY2025; up 31 since Jul 2024–Jun 2025.
25	Vantor Inc. Top agencies Commerce (Department of Commerce)	$1,000,000	0.6%	Rank history: not on the FY2021–FY2024 lists and #28 in FY2025; up 11 since Jul 2024–Jun 2025.
26	Ipsos Public Affairs, LLC Top agencies HHS (Department of Health and Human Services)	$931,136	0.6%	Rank history: not on the FY2021–FY2022 lists, #47 in FY2023, #35 in FY2024 and #49 in FY2025; up 6 since Jul 2024–Jun 2025.
27	Asrt, Inc. Top agencies HHS (Department of Health and Human Services)	$914,977	0.6%	Rank history: not on the FY2021–FY2023 lists, #68 in FY2024 and #51 in FY2025; up 30 since Jul 2024–Jun 2025.
28	Creme Software Ltd Top agencies HHS (Department of Health and Human Services)	$897,750	0.6%	Rank history: not on the FY2021–FY2022 lists, #42 in FY2023, #41 in FY2024 and #30 in FY2025; up 12 since Jul 2024–Jun 2025.
29	The Ohio State University Top agencies HHS (Department of Health and Human Services)	$867,755	0.5%	Rank history: #73 in FY2021, #49 in FY2022, #91 in FY2023, not on the FY2024 list and #31 in FY2025; new, not ranked in Jul 2024–Jun 2025.
30	Tripoint Solutions, LLC Top agencies ED (Department of Education)	$845,829	0.5%	Rank history: not on the FY2021–FY2023 lists, #43 in FY2024 and #32 in FY2025; up 13 since Jul 2024–Jun 2025.
31	Ivyhill-Zai, LLC Top agencies HHS (Department of Health and Human Services)	$829,582	0.5%	Rank history: not on the FY2021–FY2024 lists and #34 in FY2025; new, not ranked in Jul 2024–Jun 2025.
32	Priwils Inc. Top agencies NSF (National Science Foundation)	$825,189	0.5%	Rank history: not on the FY2021–FY2024 lists and #35 in FY2025; new, not ranked in Jul 2024–Jun 2025.
33	American Association for the Advancement of Science Top agencies VA (Department of Veterans Affairs)	$822,535	0.5%	Rank history: #30 in FY2021, #31 in FY2022, #48 in FY2023, #46 in FY2024 and #33 in FY2025; up 12 since Jul 2024–Jun 2025.
34	Westat, Inc. Top agencies HHS (Department of Health and Human Services)	$789,229	0.5%	Rank history: #37 in FY2021, not on the FY2022–FY2023 lists, #83 in FY2024 and #60 in FY2025; up 34 since Jul 2024–Jun 2025.
35	Precision Water Resources Engineering, Inc. Top agencies DOI (Department of the Interior)	$737,003	0.5%	Rank history: not on the FY2021–FY2022 lists, #51 in FY2023, not on the FY2024 list and #37 in FY2025; new, not ranked in Jul 2024–Jun 2025.
36	North Pacific Wildlife Consulting, LLC Top agencies DOI (Department of the Interior)	$722,828	0.4%	Rank history: #87 in FY2021, #30 in FY2022, not on the FY2023 list, #55 in FY2024 and #38 in FY2025; up 15 since Jul 2024–Jun 2025.
37	The Regents of the University of Colorado Top agencies EOP (Executive Office of the President)	$600,000	0.4%	Rank history: not on the FY2021–FY2024 lists and #41 in FY2025; new, not ranked in Jul 2024–Jun 2025.
38	The University of Toledo Through The Ohio State University Top agencies HHS (Department of Health and Human Services)	$540,175	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
39	Regents of the University of Michigan Top agencies NSF (National Science Foundation) Army (Department of the Army)	$507,432	0.3%	Rank history: #23 in FY2021, not on the FY2022 list, #57 in FY2023, #42 in FY2024 and #36 in FY2025; up 2 since Jul 2024–Jun 2025.
40	Kamphaeng Phet Hospital Top agencies DHA (Defense Health Agency)	$500,534	0.3%	Rank history: not on the FY2021–FY2024 lists and #59 in FY2025; up 92 since Jul 2024–Jun 2025.
41	RTI Laboratories Inc. Top agencies DOI (Department of the Interior)	$496,090	0.3%	Rank history: not on the FY2021–FY2023 lists, #40 in FY2024 and #45 in FY2025; down 2 since Jul 2024–Jun 2025.
42	National Opinion Research Center Top agencies HHS (Department of Health and Human Services)	$491,105	0.3%	Rank history: not on the FY2021 list, #35 in FY2022, #44 in FY2023, #51 in FY2024 and #46 in FY2025; new, not ranked in Jul 2024–Jun 2025.
43	Ama Analytical Services, Inc. Top agencies HHS (Department of Health and Human Services)	$486,825	0.3%	Rank history: not on the FY2021 list, #87 in FY2022, not on the FY2023–FY2024 lists and #86 in FY2025; up 48 since Jul 2024–Jun 2025.
44	Guidehouse Inc. Through Aptim Federal Services, LLC Top agencies DOI (Department of the Interior)	$485,517	0.3%	Rank history: not on the FY2021–FY2023 lists, #8 in FY2024 and #47 in FY2025; down 31 since Jul 2024–Jun 2025.
45	Safegraph LLC Top agencies Commerce (Department of Commerce)	$442,900	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
46	Caitta Inc Top agencies HHS (Department of Health and Human Services)	$417,557	0.3%	Rank history: not on the FY2021–FY2022 lists, #53 in FY2023, #53 in FY2024 and #72 in FY2025; new, not ranked in Jul 2024–Jun 2025.
47	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	0.3%	Rank history: #10 in FY2021, #13 in FY2022, #13 in FY2023, #14 in FY2024 and #16 in FY2025; down 27 since Jul 2024–Jun 2025.
48	American College of Emergency Physicians Top agencies HHS (Department of Health and Human Services)	$400,000	0.2%	Rank history: not on the FY2021–FY2023 lists, #80 in FY2024 and #76 in FY2025; up 16 since Jul 2024–Jun 2025.
49	Woolpert, Inc. Top agencies DOI (Department of the Interior)	$335,692	0.2%	Rank history: not on the FY2021–FY2024 lists and #85 in FY2025; new, not ranked in Jul 2024–Jun 2025.
50	International Consulting Associates, Inc. Top agencies HHS (Department of Health and Human Services)	$330,100	0.2%	Rank history: #46 in FY2021, #86 in FY2022, #9 in FY2023, not on the FY2024 list and #87 in FY2025; up 42 since Jul 2024–Jun 2025.
51	TGS-Nopec Geophysical Company Through A2D Technologies, Inc. Top agencies DOI (Department of the Interior)	$325,068	0.2%	Rank history: not on the FY2021–FY2023 lists, #76 in FY2024 and #55 in FY2025; up 10 since Jul 2024–Jun 2025.
52	Institute for Clinical Pharmacodynamics, Inc. Top agencies HHS (Department of Health and Human Services)	$325,000	0.2%	Rank history: not on the FY2021–FY2022 lists, #71 in FY2023, #85 in FY2024 and not on the FY2025 list; up 19 since Jul 2024–Jun 2025.
53	Tributary Solutions, LLC Top agencies DOI (Department of the Interior)	$323,232	0.2%	Rank history: not on the FY2021–FY2024 lists and #56 in FY2025; new, not ranked in Jul 2024–Jun 2025.
54	Arctic Slope Regional Corporation Through Asrc Federal Data Network Technologies, LLC Top agencies EPA (Environmental Protection Agency)	$317,516	0.2%	Rank history: #71 in FY2021, #47 in FY2022, #5 in FY2023, #75 in FY2024 and #6 in FY2025; down 46 since Jul 2024–Jun 2025.
55	Cyano Holdings, Inc. Top agencies DOI (Department of the Interior)	$316,200	0.2%	Rank history: not on the FY2021–FY2024 lists and #77 in FY2025; up 99 since Jul 2024–Jun 2025.
56	GT Molecular, Inc. Top agencies HHS (Department of Health and Human Services)	$311,684	0.2%	Rank history: not on the FY2021–FY2023 lists, #69 in FY2024 and #57 in FY2025; down 8 since Jul 2024–Jun 2025.
57	CFD Research Corporation Top agencies HHS (Department of Health and Human Services)	$287,575	0.2%	Rank history: not on the FY2021–FY2024 lists and #58 in FY2025; up 5 since Jul 2024–Jun 2025.
58	Vets Synergetic Group LLC Top agencies HHS (Department of Health and Human Services)	$285,028	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
59	Purdue University Top agencies HHS (Department of Health and Human Services) Navy (Department of the Navy)	$263,000	0.2%	Rank history: not on the FY2021–FY2023 lists, #87 in FY2024 and #62 in FY2025; up 11 since Jul 2024–Jun 2025.
60	Andrew S. Mccreath & Son, Inc. Top agencies DLA (Defense Logistics Agency)	$247,049	0.2%	Rank history: not on the FY2021–FY2023 lists, #86 in FY2024 and #64 in FY2025; new, not ranked in Jul 2024–Jun 2025.
61	Fujifilm Sonosite Inc. Through Fujifilm Biosciences Inc. Top agencies HHS (Department of Health and Human Services)	$246,980	0.2%	Rank history: not on the FY2021–FY2024 lists and #65 in FY2025; new, not ranked in Jul 2024–Jun 2025.
62	Seqmatic, LLC Top agencies USDA (Department of Agriculture) DOI (Department of the Interior) Commerce (Department of Commerce)	$246,840	0.2%	Rank history: not on the FY2021–FY2024 lists and #97 in FY2025; up 28 since Jul 2024–Jun 2025.
63	State of California Department of Water Resources Top agencies DOI (Department of the Interior)	$233,286	0.1%	Rank history: not on the FY2021–FY2025 lists; up 46 since Jul 2024–Jun 2025.
64	Float Partners LLC Top agencies Commerce (Department of Commerce)	$224,114	0.1%	Rank history: not on the FY2021–FY2024 lists and #69 in FY2025; new, not ranked in Jul 2024–Jun 2025.
65	Water District 1 Top agencies DOI (Department of the Interior)	$222,744	0.1%	Rank history: not on the FY2021–FY2025 lists; up 73 since Jul 2024–Jun 2025.
66	Samsung Electronics Co.,Ltd. Through Circana, LLC Top agencies HHS (Department of Health and Human Services)	$222,366	0.1%	Rank history: not on the FY2021–FY2024 lists and #24 in FY2025; down 36 since Jul 2024–Jun 2025.
67	Integrated Behavioral Health, Inc. Top agencies HHS (Department of Health and Human Services)	$219,949	0.1%	Rank history: #67 in FY2021, #38 in FY2022, #95 in FY2023, #72 in FY2024 and #52 in FY2025; down 9 since Jul 2024–Jun 2025.
68	Credere Associates, LLC Top agencies Army (Department of the Army)	$213,292	0.1%	Rank history: not on the FY2021–FY2024 lists and #92 in FY2025; new, not ranked in Jul 2024–Jun 2025.
69	Duke University Top agencies Army (Department of the Army)	$203,667	0.1%	Rank history: #70 in FY2021, not on the FY2022–FY2024 lists and #73 in FY2025; new, not ranked in Jul 2024–Jun 2025.
70	IHS Global Inc Through R.l. Polk & Co Top agencies Commerce (Department of Commerce)	$199,027	0.1%	Rank history: not on the FY2021–FY2024 lists and #66 in FY2025; up 3 since Jul 2024–Jun 2025.
71	Rector & Visitors of the University of Virginia Top agencies DHA (Defense Health Agency)	$187,103	0.1%	Rank history: not on the FY2021–FY2024 lists and #80 in FY2025; up 29 since Jul 2024–Jun 2025.
72	Diana Caridha Top agencies DHA (Defense Health Agency)	$184,962	0.1%	Rank history: not on the FY2021–FY2024 lists and #84 in FY2025; up 15 since Jul 2024–Jun 2025.
73	The Mitre Corporation Top agencies DOI (Department of the Interior)	$181,303	0.1%	Rank history: not on the FY2021–FY2023 lists, #7 in FY2024 and not on the FY2025 list; down 63 since Jul 2024–Jun 2025.
74	Oregon State University Top agencies Army (Department of the Army) DOI (Department of the Interior)	$162,301	0.1%	Rank history: not on the FY2021–FY2024 lists and #88 in FY2025; new, not ranked in Jul 2024–Jun 2025.
75	Mpala Research Centre Top agencies Smithsonian (Smithsonian Institution)	$160,499	0.1%	Rank history: not on the FY2021–FY2024 lists and #89 in FY2025; new, not ranked in Jul 2024–Jun 2025.
76	Regents of the University of Minnesota Top agencies HHS (Department of Health and Human Services)	$150,000	0.1%	Rank history: not on the FY2021–FY2024 lists and #91 in FY2025; new, not ranked in Jul 2024–Jun 2025.
77	Molbreeding Biotechnology LLC Top agencies USDA (Department of Agriculture)	$143,840	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
78	Trustees of Boston University Top agencies VA (Department of Veterans Affairs)	$141,230	0.1%	Rank history: #72 in FY2021, #88 in FY2022, not on the FY2023–FY2024 lists and #78 in FY2025; up 5 since Jul 2024–Jun 2025.
79	Conservation Metrics, Inc. Top agencies DOI (Department of the Interior)	$140,330	0.1%	Rank history: not on the FY2021–FY2024 lists and #93 in FY2025; new, not ranked in Jul 2024–Jun 2025.
80	Chenega Enterprise Systems & Solutions, LLC Top agencies HHS (Department of Health and Human Services)	$139,747	0.1%	Rank history: #17 in FY2021, #19 in FY2022, #27 in FY2023, #81 in FY2024 and #94 in FY2025; new, not ranked in Jul 2024–Jun 2025.
81	Chinook Systems Inc. Top agencies OSD (Office of the Secretary of Defense)	$138,276	0.1%	Rank history: not on the FY2021–FY2024 lists and #96 in FY2025; new, not ranked in Jul 2024–Jun 2025.
82	Anamar Environmental Consulting, Inc. Top agencies Army (Department of the Army)	$134,544	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
83	Myong Sun KIM Top agencies DHA (Defense Health Agency)	$132,884	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
84	Michigan State University Top agencies USDA (Department of Agriculture)	$126,200	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
85	Mms, Inc. Top agencies HHS (Department of Health and Human Services)	$125,210	0.1%	Rank history: not on the FY2021–FY2023 lists, #100 in FY2024 and #79 in FY2025; down 18 since Jul 2024–Jun 2025.
86	President and Fellows of Harvard College Top agencies HHS (Department of Health and Human Services)	$124,980	0.1%	Rank history: not on the FY2021–FY2024 lists and #100 in FY2025; new, not ranked in Jul 2024–Jun 2025.
87	Ocean Associates Inc. Top agencies Commerce (Department of Commerce)	$123,959	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
88	Aptive Resources LLC Top agencies HHS (Department of Health and Human Services)	$122,362	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
89	S&P Global Market Intelligence LLC Top agencies Commerce (Department of Commerce)	$118,850	0.1%	Rank history: not on the FY2021–FY2025 lists; up 16 since Jul 2024–Jun 2025.
90	Texas A&M Univ Cyclotron Ins Top agencies Navy (Department of the Navy)	$116,400	0.1%	Rank history: not on the FY2021–FY2025 lists; up 50 since Jul 2024–Jun 2025.
91	G2S Corp Top agencies HHS (Department of Health and Human Services)	$108,735	0.1%	Rank history: #35 in FY2021, not on the FY2022–FY2023 lists, #93 in FY2024 and not on the FY2025 list; new, not ranked in Jul 2024–Jun 2025.
92	Denver Health and Hospital Authority Top agencies HHS (Department of Health and Human Services)	$108,250	0.1%	Rank history: #77 in FY2021, #55 in FY2022, not on the FY2023 list, #67 in FY2024 and #67 in FY2025; down 18 since Jul 2024–Jun 2025.
93	Olink Proteomics Inc. Top agencies HHS (Department of Health and Human Services)	$106,675	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
94	Admera Health LLC Top agencies USDA (Department of Agriculture)	$105,251	0.1%	Rank history: not on the FY2021–FY2024 lists and #99 in FY2025; up 77 since Jul 2024–Jun 2025.
95	In Silichrom Ltd Top agencies HHS (Department of Health and Human Services)	$101,901	0.1%	Rank history: not on the FY2021 list, #97 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
96	The George Mason University Instructional Foundation, Inc. Through George Mason University Top agencies DHA (Defense Health Agency)	$97,897	0.1%	Rank history: not on the FY2021–FY2023 lists, #79 in FY2024 and not on the FY2025 list; down 33 since Jul 2024–Jun 2025.
97	Turrem Corp. Top agencies HHS (Department of Health and Human Services)	$95,075	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
98	Openstreetmap United States Inc. Top agencies DOI (Department of the Interior) DOT (Department of Transportation)	$91,500	0.1%	Rank history: not on the FY2021–FY2025 lists; up 52 since Jul 2024–Jun 2025.
99	University of California San Diego Top agencies DOT (Department of Transportation)	$89,626	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
100	Malvern Panalytical Inc. Top agencies Navy (Department of the Navy)	$86,594	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.

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100 of 261 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 $161 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 PSC B529 contractors in Jul 2025–Jun 2026?

1. ManTech International Corporation ($24.9M), 2. Deloitte ($12.1M), 3. Great Hill Solutions, LLC ($11.7M), 4. Mccrone Associates Inc. ($10.7M), 5. Iqvia Government Solutions Inc ($10.5M), 6. Source Healthcare Analytics LLC ($7.66M), 7. Information Management Services, Inc. ($5.14M), 8. Teledyne Technologies Incorporated ($4.99M), 9. Gryphon Technologies L.C. ($4.84M), 10. Research Triangle Institute ($4.4M).

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