Top 100 Contractors in PSC R405: Operations Research and Quantitative Analysis Services, Jul 2025–Jun 2026

Name: Top 100 Contractors in PSC R405: Operations Research and Quantitative Analysis Services, 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 48% of PSC R405 contract dollars from July 2025 through June 2026

Contract obligations: $301,709,713 Net of deobligations, by contracts coded PSC R405
Contractors: 144 Parent companies with an obligation
Largest contractor: Human Resources Research Organization (Humrro) $25.1 million, 8.0% 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	Human Resources Research Organization (Humrro) Top agencies DHRA (Defense Human Resources Activity) OSD (Office of the Secretary of Defense)	$25,142,724	8.0%	Rank history: #37 in FY2021, not on the FY2022–FY2024 lists and #2 in FY2025; up 2 since Jul 2024–Jun 2025.
2	Accenture Federal Services LLC Top agencies DHS (Department of Homeland Security)	$20,303,044	6.4%	Rank history: not on the FY2021–FY2023 lists, #10 in FY2024 and #3 in FY2025; up 5 since Jul 2024–Jun 2025.
3	Computational Physics, Inc. Top agencies Navy (Department of the Navy)	$19,109,700	6.0%	Rank history: #23 in FY2021, #15 in FY2022, #17 in FY2023, #9 in FY2024 and #4 in FY2025; up 1 since Jul 2024–Jun 2025.
4	Titan Alpha LLC Top agencies VA (Department of Veterans Affairs)	$15,343,656	4.9%	Rank history: not on the FY2021–FY2023 lists, #8 in FY2024 and #7 in FY2025; up 8 since Jul 2024–Jun 2025.
5	Systems Planning and Analysis, Inc. Top agencies OSD (Office of the Secretary of Defense) Navy (Department of the Navy)	$14,185,252	4.5%	Rank history: not on the FY2021–FY2024 lists and #24 in FY2025; new, not ranked in Jul 2024–Jun 2025.
6	The Johns Hopkins University Applied Physics Laboratory LLC Top agencies DHS (Department of Homeland Security) USAF (Department of the Air Force)	$13,305,619	4.2%	Rank history: not on the FY2021–FY2024 lists and #11 in FY2025; new, not ranked in Jul 2024–Jun 2025.
7	Deloitte 2 awardees, including Deloitte Consulting LLP Top agencies DOJ (Department of Justice) VA (Department of Veterans Affairs)	$12,657,048	4.0%	Rank history: not on the FY2021–FY2023 lists, #6 in FY2024 and #5 in FY2025; up 2 since Jul 2024–Jun 2025.
8	JP Systems, Inc. Top agencies VA (Department of Veterans Affairs)	$10,911,286	3.5%	Rank history: #6 in FY2021, #23 in FY2022, #50 in FY2023, #55 in FY2024 and #15 in FY2025; new, not ranked in Jul 2024–Jun 2025.
9	Halvik LLC Top agencies DOT (Department of Transportation) Army (Department of the Army)	$10,319,397	3.3%	Rank history: not on the FY2021–FY2023 lists, #19 in FY2024 and #13 in FY2025; up 9 since Jul 2024–Jun 2025.
10	Science Applications International Corporation Top agencies OSD (Office of the Secretary of Defense)	$9,655,911	3.1%	Rank history: not on the FY2021–FY2024 lists and #19 in FY2025; new, not ranked in Jul 2024–Jun 2025.
11	American Institutes for Research In the Behavioral Sciences Top agencies Army (Department of the Army)	$9,531,724	3.0%	Rank history: #90 in FY2021, #56 in FY2022, #64 in FY2023, #11 in FY2024 and #8 in FY2025; down 3 since Jul 2024–Jun 2025.
12	Booz Allen Hamilton Holding Corporation Through Booz Allen Hamilton Inc. Top agencies OSD (Office of the Secretary of Defense) HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$6,594,109	2.1%	Rank history: #4 in FY2021, #5 in FY2022, #4 in FY2023, #7 in FY2024 and #12 in FY2025; down 6 since Jul 2024–Jun 2025.
13	Amentum Holdings, Inc. Through Amentum Services, Inc. Top agencies NASA (National Aeronautics and Space Administration)	$6,263,126	2.0%	Rank history: not on the FY2021–FY2024 lists and #6 in FY2025; up 2 since Jul 2024–Jun 2025.
14	A3 Consulting Services Inc. Through A3 Consulting LLC Top agencies DCSA (Defense Counterintelligence and Security Agency)	$5,800,441	1.8%	Rank history: not on the FY2021–FY2023 lists, #23 in FY2024 and #17 in FY2025; up 9 since Jul 2024–Jun 2025.
15	Analygence Inc. Through Tharros Defense, Inc. Top agencies DHS (Department of Homeland Security)	$5,518,382	1.7%	Rank history: not on the FY2021–FY2022 lists, #21 in FY2023, #18 in FY2024 and #18 in FY2025; up 6 since Jul 2024–Jun 2025.
16	Bowhead Program Management & Operations, LLC Top agencies Navy (Department of the Navy)	$5,511,028	1.7%	Rank history: not on the FY2021–FY2022 lists, #84 in FY2023, #37 in FY2024 and #16 in FY2025; up 36 since Jul 2024–Jun 2025.
17	Peraton Inc. Top agencies DHRA (Defense Human Resources Activity)	$4,650,525	1.5%	Rank history: not on the FY2021–FY2023 lists, #65 in FY2024 and #21 in FY2025; up 47 since Jul 2024–Jun 2025.
18	Padron Partners II LLC Top agencies DHS (Department of Homeland Security)	$3,977,874	1.3%	Rank history: not on the FY2021–FY2023 lists, #15 in FY2024 and #27 in FY2025; up 1 since Jul 2024–Jun 2025.
19	Sugpiat Defense, LLC Top agencies DHA (Defense Health Agency)	$3,949,773	1.2%	Rank history: not on the FY2021 list, #27 in FY2022, #25 in FY2023, #26 in FY2024 and #25 in FY2025; up 11 since Jul 2024–Jun 2025.
20	CACI International Inc. Through Caci, Inc. - Federal Top agencies USAF (Department of the Air Force)	$3,861,291	1.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
21	Group W Inc. Top agencies Army (Department of the Army)	$3,604,484	1.1%	Rank history: #52 in FY2021, #42 in FY2022, #43 in FY2023, #42 in FY2024 and #49 in FY2025; up 19 since Jul 2024–Jun 2025.
22	Iproov Limited Top agencies DHS (Department of Homeland Security)	$3,575,873	1.1%	Rank history: not on the FY2021–FY2022 lists, #34 in FY2023, #40 in FY2024 and #29 in FY2025; up 14 since Jul 2024–Jun 2025.
23	J29, Inc. Top agencies HHS (Department of Health and Human Services)	$3,548,267	1.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
24	Mathematica Inc. 2 awardees Top agencies USDA (Department of Agriculture) HHS (Department of Health and Human Services)	$3,502,712	1.1%	Rank history: not on the FY2021–FY2023 lists, #45 in FY2024 and #31 in FY2025; up 26 since Jul 2024–Jun 2025.
25	Padron LLC Top agencies DHS (Department of Homeland Security)	$3,431,788	1.1%	Rank history: not on the FY2021–FY2023 lists, #28 in FY2024 and #33 in FY2025; up 7 since Jul 2024–Jun 2025.
26	National Opinion Research Center Top agencies DOT (Department of Transportation) SEC (Securities and Exchange Commission)	$3,380,825	1.1%	Rank history: #84 in FY2021, #22 in FY2022, #49 in FY2023, not on the FY2024 list and #23 in FY2025; up 2 since Jul 2024–Jun 2025.
27	Eagle Harbor, LLC Top agencies DOJ (Department of Justice)	$2,931,938	0.9%	Rank history: not on the FY2021–FY2022 lists, #36 in FY2023, #33 in FY2024 and #26 in FY2025; down 2 since Jul 2024–Jun 2025.
28	Celeen LLC Top agencies DHS (Department of Homeland Security)	$2,706,559	0.9%	Rank history: not on the FY2021–FY2023 lists, #17 in FY2024 and #36 in FY2025; down 6 since Jul 2024–Jun 2025.
29	Techpride-Jpi JV, LLC Top agencies DHS (Department of Homeland Security)	$2,688,204	0.9%	Rank history: not on the FY2021–FY2023 lists, #58 in FY2024 and #34 in FY2025; up 12 since Jul 2024–Jun 2025.
30	Gartner, Inc. Top agencies Army (Department of the Army) Commerce (Department of Commerce)	$2,596,294	0.8%	Rank history: not on the FY2021 list, #70 in FY2022, #52 in FY2023, #51 in FY2024 and #39 in FY2025; up 14 since Jul 2024–Jun 2025.
31	Advanced Systems Technology & Management, Inc. Top agencies USAF (Department of the Air Force)	$2,529,854	0.8%	Rank history: #47 in FY2021, #41 in FY2022, not on the FY2023 list, #49 in FY2024 and #58 in FY2025; up 35 since Jul 2024–Jun 2025.
32	ABT Global LLC Top agencies HHS (Department of Health and Human Services)	$2,312,159	0.7%	Rank history: not on the FY2021–FY2023 lists, #31 in FY2024 and #37 in FY2025; up 11 since Jul 2024–Jun 2025.
33	Epathusa Inc. Top agencies HHS (Department of Health and Human Services)	$2,282,130	0.7%	Rank history: not on the FY2021–FY2023 lists, #53 in FY2024 and #38 in FY2025; up 13 since Jul 2024–Jun 2025.
34	Tripoint Solutions, LLC Top agencies DHRA (Defense Human Resources Activity)	$2,151,448	0.7%	Rank history: not on the FY2021–FY2024 lists and #44 in FY2025; up 13 since Jul 2024–Jun 2025.
35	Nodi Solutions, LLC Top agencies DHS (Department of Homeland Security)	$2,124,112	0.7%	Rank history: not on the FY2021–FY2023 lists, #54 in FY2024 and #43 in FY2025; up 14 since Jul 2024–Jun 2025.
36	The Urban Institute Top agencies DOL (Department of Labor)	$2,074,997	0.7%	Rank history: not on the FY2021 list, #38 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
37	Metaphase Consulting LLC Top agencies DHS (Department of Homeland Security)	$2,022,528	0.6%	Rank history: #29 in FY2021, #11 in FY2022, #16 in FY2023, #24 in FY2024 and #45 in FY2025; down 11 since Jul 2024–Jun 2025.
38	International Data Systems LLC Top agencies DHA (Defense Health Agency)	$2,018,623	0.6%	Rank history: not on the FY2021–FY2023 lists, #57 in FY2024 and #46 in FY2025; up 13 since Jul 2024–Jun 2025.
39	Kpmg LLP Top agencies HUD (Department of Housing and Urban Development)	$1,994,983	0.6%	Rank history: not on the FY2021–FY2024 lists and #48 in FY2025; up 14 since Jul 2024–Jun 2025.
40	Ivaal Federal LLC Top agencies DHS (Department of Homeland Security)	$1,806,782	0.6%	Rank history: not on the FY2021–FY2024 lists and #51 in FY2025; up 15 since Jul 2024–Jun 2025.
41	Contracting Resources Group Inc Top agencies DHA (Defense Health Agency)	$1,736,128	0.5%	Rank history: not on the FY2021–FY2022 lists, #68 in FY2023, #62 in FY2024 and #52 in FY2025; up 16 since Jul 2024–Jun 2025.
42	Analytica LLC Top agencies DHS (Department of Homeland Security)	$1,628,481	0.5%	Rank history: not on the FY2021–FY2024 lists and #54 in FY2025; new, not ranked in Jul 2024–Jun 2025.
43	Aermor LLC Top agencies Navy (Department of the Navy)	$1,583,369	0.5%	Rank history: #65 in FY2021, #47 in FY2022, #54 in FY2023, #66 in FY2024 and #61 in FY2025; up 30 since Jul 2024–Jun 2025.
44	The Mitre Corporation Top agencies SSA (Social Security Administration)	$1,576,345	0.5%	Rank history: #26 in FY2021, #26 in FY2022, #7 in FY2023, #4 in FY2024 and #67 in FY2025; down 30 since Jul 2024–Jun 2025.
45	Federated IT, Inc. Top agencies Navy (Department of the Navy)	$1,570,767	0.5%	Rank history: not on the FY2021–FY2024 lists and #50 in FY2025; up 13 since Jul 2024–Jun 2025.
46	Tecolote Research, Inc. Top agencies DHS (Department of Homeland Security)	$1,499,613	0.5%	Rank history: #42 in FY2021, #34 in FY2022, #51 in FY2023, #60 in FY2024 and #47 in FY2025; up 10 since Jul 2024–Jun 2025.
47	Koniag It Systems, LLC Top agencies DOS (Department of State)	$1,358,896	0.4%	Rank history: not on the FY2021–FY2023 lists, #35 in FY2024 and #14 in FY2025; down 31 since Jul 2024–Jun 2025.
48	Kingfisher Systems, Inc. Top agencies DOT (Department of Transportation)	$1,342,059	0.4%	Rank history: not on the FY2021 list, #82 in FY2022, #67 in FY2023, #69 in FY2024 and #59 in FY2025; up 20 since Jul 2024–Jun 2025.
49	Westat, Inc. 2 awardees Top agencies DOT (Department of Transportation)	$1,340,246	0.4%	Rank history: #44 in FY2021, #92 in FY2022, #97 in FY2023, #22 in FY2024 and #53 in FY2025; down 4 since Jul 2024–Jun 2025.
50	The Survice Engineering Company LLC Top agencies DFAS (Defense Finance and Accounting Service)	$1,334,986	0.4%	Rank history: not on the FY2021 list, #45 in FY2022, #37 in FY2023, #46 in FY2024 and #41 in FY2025; down 15 since Jul 2024–Jun 2025.
51	Applied Research Associates, Inc. Top agencies DHS (Department of Homeland Security)	$1,325,985	0.4%	Rank history: not on the FY2021 list, #4 in FY2022, #2 in FY2023, #2 in FY2024 and #10 in FY2025; down 49 since Jul 2024–Jun 2025.
52	National Academy of Public Administration Top agencies DOT (Department of Transportation)	$1,300,867	0.4%	Rank history: not on the FY2021–FY2023 lists, #64 in FY2024 and not on the FY2025 list; up 9 since Jul 2024–Jun 2025.
53	Laulima Government Solutions, LLC Top agencies DHA (Defense Health Agency)	$1,169,926	0.4%	Rank history: not on the FY2021–FY2024 lists and #60 in FY2025; new, not ranked in Jul 2024–Jun 2025.
54	Kaihonua LLC Top agencies DHA (Defense Health Agency)	$1,164,834	0.4%	Rank history: #45 in FY2021, #43 in FY2022, #76 in FY2023, #71 in FY2024 and #62 in FY2025; up 18 since Jul 2024–Jun 2025.
55	Leisnoi Professional Services LLC Top agencies DOS (Department of State)	$1,119,415	0.4%	Rank history: not on the FY2021–FY2023 lists, #73 in FY2024 and #63 in FY2025; up 20 since Jul 2024–Jun 2025.
56	Cherokee Nation 2 awardees, including Cherokee Nation Government Solutions, L.L.C. Top agencies Navy (Department of the Navy)	$1,096,896	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
57	The District Communications Group LLC Top agencies DOS (Department of State)	$1,076,521	0.3%	Rank history: not on the FY2021–FY2024 lists and #65 in FY2025; new, not ranked in Jul 2024–Jun 2025.
58	Federal Data Systems LLC Through Feddata Technology Solutions, LLC Top agencies USCYBERCOM (Department of Defense Cyber Command)	$1,050,400	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
59	Data Recognition Corporation Top agencies DHRA (Defense Human Resources Activity)	$988,169	0.3%	Rank history: not on the FY2021 list, #93 in FY2022, #28 in FY2023, #36 in FY2024 and #20 in FY2025; down 32 since Jul 2024–Jun 2025.
60	Vector Psychometric Group, LLC Top agencies VA (Department of Veterans Affairs)	$950,000	0.3%	Rank history: not on the FY2021–FY2022 lists, #75 in FY2023, #81 in FY2024 and #94 in FY2025; new, not ranked in Jul 2024–Jun 2025.
61	LRS Federal LLC Top agencies DHS (Department of Homeland Security)	$946,351	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
62	Yulista Solutions, LLC Top agencies Navy (Department of the Navy)	$940,547	0.3%	Rank history: not on the FY2021–FY2022 lists, #6 in FY2023, #20 in FY2024 and #30 in FY2025; down 28 since Jul 2024–Jun 2025.
63	Solutions for Information Design, Inc. Top agencies DHS (Department of Homeland Security)	$932,903	0.3%	Rank history: #86 in FY2021, #91 in FY2022, #90 in FY2023, not on the FY2024 list and #66 in FY2025; up 6 since Jul 2024–Jun 2025.
64	C5T Corporation Top agencies USAF (Department of the Air Force)	$909,545	0.3%	Rank history: #83 in FY2021, #63 in FY2022, #60 in FY2023, not on the FY2024 list and #57 in FY2025; down 1 since Jul 2024–Jun 2025.
65	IT Data Consulting L.L.C. Top agencies HUD (Department of Housing and Urban Development)	$841,087	0.3%	Rank history: not on the FY2021–FY2022 lists, #83 in FY2023, #80 in FY2024 and #69 in FY2025; up 11 since Jul 2024–Jun 2025.
66	Arete Associates Top agencies Navy (Department of the Navy)	$796,297	0.3%	Rank history: not on the FY2021–FY2024 lists and #56 in FY2025; down 1 since Jul 2024–Jun 2025.
67	Pinao Consulting LLC Top agencies DHA (Defense Health Agency)	$788,369	0.2%	Rank history: not on the FY2021–FY2023 lists, #89 in FY2024 and #73 in FY2025; new, not ranked in Jul 2024–Jun 2025.
68	One Federal Solution Corporation Top agencies DCSA (Defense Counterintelligence and Security Agency)	$771,559	0.2%	Rank history: not on the FY2021–FY2024 lists and #83 in FY2025; new, not ranked in Jul 2024–Jun 2025.
69	Global Data Publications Inc. Top agencies HHS (Department of Health and Human Services)	$733,404	0.2%	Rank history: not on the FY2021–FY2023 lists, #83 in FY2024 and #70 in FY2025; up 11 since Jul 2024–Jun 2025.
70	University of California, LOS Angeles Top agencies VA (Department of Veterans Affairs)	$710,000	0.2%	Rank history: not on the FY2021–FY2024 lists and #71 in FY2025; new, not ranked in Jul 2024–Jun 2025.
71	Clouden Technologies LLC Top agencies DHS (Department of Homeland Security)	$704,410	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
72	Explore Digits Inc Top agencies HHS (Department of Health and Human Services)	$697,376	0.2%	Rank history: not on the FY2021–FY2022 lists, #70 in FY2023, #52 in FY2024 and #64 in FY2025; down 24 since Jul 2024–Jun 2025.
73	Infotrend Incorporated Top agencies SEC (Securities and Exchange Commission)	$688,080	0.2%	Rank history: #67 in FY2021, #68 in FY2022, #65 in FY2023, #84 in FY2024 and #72 in FY2025; up 1 since Jul 2024–Jun 2025.
74	Advanced Management Strategies Group Inc. Top agencies Army (Department of the Army)	$647,703	0.2%	Rank history: not on the FY2021–FY2023 lists, #91 in FY2024 and not on the FY2025 list; up 12 since Jul 2024–Jun 2025.
75	Research Triangle Institute Top agencies HHS (Department of Health and Human Services)	$637,710	0.2%	Rank history: #50 in FY2021, #21 in FY2022, not on the FY2023 list, #29 in FY2024 and #82 in FY2025; down 13 since Jul 2024–Jun 2025.
76	Guardian Defense Group, Inc. Top agencies Navy (Department of the Navy)	$627,902	0.2%	Rank history: not on the FY2021–FY2022 lists, #99 in FY2023, not on the FY2024 list and #81 in FY2025; up 20 since Jul 2024–Jun 2025.
77	Totally Joined for Achieving Collaborative Techniques (Tjfact), LLC Top agencies Army (Department of the Army)	$470,394	0.1%	Rank history: #79 in FY2021, #83 in FY2022, #87 in FY2023, #86 in FY2024 and #79 in FY2025; up 6 since Jul 2024–Jun 2025.
78	Liona Enterprises Inc Top agencies DOD (Department of Defense)	$383,778	0.1%	Rank history: not on the FY2021–FY2024 lists and #85 in FY2025; up 19 since Jul 2024–Jun 2025.
79	Goldbelt C6, LLC Top agencies DOS (Department of State)	$360,767	0.1%	Rank history: not on the FY2021–FY2025 lists; up 43 since Jul 2024–Jun 2025.
80	Integrated Data Services, LLC Top agencies USAF (Department of the Air Force)	$356,052	0.1%	Rank history: not on the FY2021–FY2024 lists and #87 in FY2025; up 19 since Jul 2024–Jun 2025.
81	Tetra Tech, Inc. 2 awardees, including Pro-Telligent, LLC and RPS Group, Inc. Top agencies DOS (Department of State) DOI (Department of the Interior)	$341,362	0.1%	Rank history: not on the FY2021–FY2024 lists and #91 in FY2025; up 54 since Jul 2024–Jun 2025.
82	Semanticbits LLC Through ICF Incorporated, L.L.C. Top agencies DOL (Department of Labor)	$327,401	0.1%	Rank history: not on the FY2021–FY2023 lists, #56 in FY2024 and not on the FY2025 list; down 4 since Jul 2024–Jun 2025.
83	Leidos Holdings, Inc. 2 awardees, including Leidos, Inc. Top agencies Army (Department of the Army)	$322,102	0.1%	Rank history: #1 in FY2021, #1 in FY2022, #1 in FY2023, #1 in FY2024 and #1 in FY2025; down 82 since Jul 2024–Jun 2025.
84	National Institute of Statistical Sciences Top agencies USDA (Department of Agriculture)	$284,516	0.1%	Rank history: not on the FY2021–FY2024 lists and #90 in FY2025; new, not ranked in Jul 2024–Jun 2025.
85	Areli Inc. Top agencies Army (Department of the Army)	$278,202	0.1%	Rank history: not on the FY2021–FY2023 lists, #100 in FY2024 and #92 in FY2025; up 19 since Jul 2024–Jun 2025.
86	Idea Entity Corporation Top agencies Army (Department of the Army)	$273,669	0.1%	Rank history: not on the FY2021–FY2023 lists, #76 in FY2024 and not on the FY2025 list; new, not ranked in Jul 2024–Jun 2025.
87	Prevailance Inc. Top agencies Navy (Department of the Navy)	$265,093	0.1%	Rank history: not on the FY2021 list, #89 in FY2022, #92 in FY2023, #98 in FY2024 and #76 in FY2025; up 1 since Jul 2024–Jun 2025.
88	Fort Belknap Indian Community Through Buffalo Horse Inc. Top agencies Treasury (Department of the Treasury)	$251,826	0.1%	Rank history: not on the FY2021–FY2024 lists and #93 in FY2025; up 32 since Jul 2024–Jun 2025.
89	LMI Consulting, LLC Top agencies USDA (Department of Agriculture)	$245,770	0.1%	Rank history: not on the FY2021–FY2022 lists, #53 in FY2023, #82 in FY2024 and #96 in FY2025; down 10 since Jul 2024–Jun 2025.
90	University of South Florida Institute of Applied Engineering, Incorporated Top agencies USAF (Department of the Air Force)	$231,326	0.1%	Rank history: not on the FY2021–FY2023 lists, #88 in FY2024 and #97 in FY2025; down 6 since Jul 2024–Jun 2025.
91	Velos LLC Top agencies DCSA (Defense Counterintelligence and Security Agency)	$222,421	0.1%	Rank history: not on the FY2021–FY2024 lists and #98 in FY2025; new, not ranked in Jul 2024–Jun 2025.
92	Washington Business Dynamics, LLC Top agencies DOD (Department of Defense)	$221,225	0.1%	Rank history: not on the FY2021–FY2025 lists; up 35 since Jul 2024–Jun 2025.
93	Ipsos Public Affairs, LLC Top agencies VA (Department of Veterans Affairs)	$217,444	0.1%	Rank history: not on the FY2021–FY2023 lists, #99 in FY2024 and #99 in FY2025; down 3 since Jul 2024–Jun 2025.
94	Tatitlek Federal Services LLC Top agencies DOS (Department of State)	$204,461	0.1%	Rank history: not on the FY2021–FY2025 lists; up 17 since Jul 2024–Jun 2025.
95	University of Arizona Top agencies Navy (Department of the Navy)	$199,905	0.1%	Rank history: not on the FY2021–FY2024 lists and #100 in FY2025; up 24 since Jul 2024–Jun 2025.
96	B. French Consulting GMBH Top agencies Army (Department of the Army)	$199,835	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
97	Axiom Consultants, Inc. Top agencies Commerce (Department of Commerce)	$167,401	0.1%	Rank history: not on the FY2021–FY2025 lists; up 36 since Jul 2024–Jun 2025.
98	Metrics LLC Top agencies VA (Department of Veterans Affairs)	$160,871	0.1%	Rank history: not on the FY2021–FY2023 lists, #79 in FY2024 and #68 in FY2025; down 16 since Jul 2024–Jun 2025.
99	NSR Solutions, Inc. Top agencies DOL (Department of Labor)	$160,434	0.1%	Rank history: not on the FY2021–FY2025 lists; up 31 since Jul 2024–Jun 2025.
100	United States Studies Centre Top agencies DOS (Department of State)	$146,277	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.

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100 of 144 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 $316 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 R405 contractors in Jul 2025–Jun 2026?

1. Human Resources Research Organization (Humrro) ($25.1M), 2. Accenture Federal Services LLC ($20.3M), 3. Computational Physics, Inc. ($19.1M), 4. Titan Alpha LLC ($15.3M), 5. Systems Planning and Analysis, Inc. ($14.2M), 6. The Johns Hopkins University Applied Physics Laboratory LLC ($13.3M), 7. Deloitte ($12.7M), 8. JP Systems, Inc. ($10.9M), 9. Halvik LLC ($10.3M), 10. Science Applications International Corporation ($9.66M).

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