Top 100 Contractors in PSC R405: Operations Research and Quantitative Analysis Services, FY2023

Name: Top 100 Contractors in PSC R405: Operations Research and Quantitative Analysis Services, FY2023
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2022 – Sep 30, 2023 Code page on GovTribe

The top 10 won 52% of FY2023 PSC R405 contract dollars

Contract obligations: $512,802,902 Net of deobligations, by contracts coded PSC R405
Contractors: 213 Parent companies with an obligation
Largest contractor: Leidos Holdings, Inc. $97.7 million, 17.0% 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	Leidos Holdings, Inc. 4 awardees, including Leidos, Inc. Top agencies Army (Department of the Army) OSD (Office of the Secretary of Defense) HHS (Department of Health and Human Services)	$97,696,462	17.0%	Rank history: #1 in FY2021, #1 in FY2022, #1 in FY2024 and #1 in FY2025; unchanged since FY2022.
2	Applied Research Associates, Inc. Top agencies DHS (Department of Homeland Security)	$46,386,397	8.1%	Rank history: not on the FY2021 list, #4 in FY2022, #2 in FY2024 and #10 in FY2025; up 2 since FY2022.
3	Kbr, Inc. Through KBR Wyle Services, LLC Top agencies NASA (National Aeronautics and Space Administration)	$33,241,116	5.8%	Rank history: #2 in FY2021, #2 in FY2022, #47 in FY2024 and not on the FY2025 list; down 1 since FY2022.
4	Booz Allen Hamilton Holding Corporation Through Booz Allen Hamilton Inc. Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security) VA (Department of Veterans Affairs)	$22,876,062	4.0%	Rank history: #4 in FY2021, #5 in FY2022, #7 in FY2024 and #12 in FY2025; up 1 since FY2022.
5	Koniag, Inc. 2 awardees, including Koniag Services, Inc. and Eagle Harbor Solutions LLC Top agencies HHS (Department of Health and Human Services) DOS (Department of State)	$19,025,102	3.3%	Rank history: #8 in FY2021, #8 in FY2022 and not on the FY2024–FY2025 lists; up 3 since FY2022.
6	Yulista Solutions, LLC Top agencies Navy (Department of the Navy)	$16,837,328	2.9%	Rank history: not on the FY2021–FY2022 lists, #20 in FY2024 and #30 in FY2025; new.
7	The Mitre Corporation Top agencies HHS (Department of Health and Human Services) DHS (Department of Homeland Security) SSA (Social Security Administration)	$16,171,916	2.8%	Rank history: #26 in FY2021, #26 in FY2022, #4 in FY2024 and #67 in FY2025; up 19 since FY2022.
8	Deloitte Consulting LLP Top agencies DOJ (Department of Justice) DHS (Department of Homeland Security)	$16,054,640	2.8%	Rank history: not on the FY2021 list, #59 in FY2022 and not on the FY2024–FY2025 lists; up 51 since FY2022.
9	Changeis, Inc. Top agencies DOT (Department of Transportation) DHS (Department of Homeland Security)	$15,698,835	2.7%	Rank history: #7 in FY2021, #7 in FY2022, #13 in FY2024 and not on the FY2025 list; down 2 since FY2022.
10	The Johns Hopkins University Through The Johns Hopkins University Applied Physics Laboratory LLC Top agencies DHS (Department of Homeland Security)	$15,629,835	2.7%	Rank history: not on the FY2021–FY2022 lists, #95 in FY2024 and not on the FY2025 list; new.
11	WWC Global LLC Top agencies DHS (Department of Homeland Security)	$12,466,975	2.2%	Rank history: not on the FY2021 list, #10 in FY2022 and not on the FY2024–FY2025 lists; down 1 since FY2022.
12	Fors Marsh Group LLC 2 awardees Top agencies DHRA (Defense Human Resources Activity) DOT (Department of Transportation)	$11,032,766	1.9%	Rank history: #19 in FY2021, #18 in FY2022, #38 in FY2024 and not on the FY2025 list; up 6 since FY2022.
13	Telesolv Consulting Inc. Top agencies DHS (Department of Homeland Security)	$10,558,346	1.8%	Rank history: #5 in FY2021, #6 in FY2022, #32 in FY2024 and not on the FY2025 list; down 7 since FY2022.
14	Accenture Inc. Through Accenture Federal Services LLC Top agencies DHS (Department of Homeland Security)	$9,790,958	1.7%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
15	Reli Group Inc. 2 awardees Top agencies HHS (Department of Health and Human Services)	$9,596,016	1.7%	Rank history: #11 in FY2021, #13 in FY2022, #12 in FY2024 and #28 in FY2025; down 2 since FY2022.
16	Metaphase Consulting LLC Top agencies DHS (Department of Homeland Security)	$8,132,184	1.4%	Rank history: #29 in FY2021, #11 in FY2022, #24 in FY2024 and #45 in FY2025; down 5 since FY2022.
17	Computational Physics, Inc. Top agencies Navy (Department of the Navy)	$7,398,342	1.3%	Rank history: #23 in FY2021, #15 in FY2022, #9 in FY2024 and #4 in FY2025; down 2 since FY2022.
18	Encompass LLC Top agencies USAID (US Agency for International Development)	$7,265,280	1.3%	Rank history: not on the FY2021–FY2022 lists, #14 in FY2024 and #40 in FY2025; new.
19	Mckinsey & Company, Inc. Through Mckinsey & Company, Inc. Washington D.c. Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$6,998,812	1.2%	Rank history: #10 in FY2021, #3 in FY2022 and not on the FY2024–FY2025 lists; down 16 since FY2022.
20	Arrow Electronics, Inc. Through Immixtechnology Inc. Top agencies Treasury (Department of the Treasury)	$6,801,501	1.2%	Rank history: not on the FY2021–FY2022 lists, #34 in FY2024 and not on the FY2025 list; new.
21	Analygence Inc. Through Tharros Defense, Inc. Top agencies DHS (Department of Homeland Security)	$6,511,356	1.1%	Rank history: not on the FY2021–FY2022 lists, #18 in FY2024 and #18 in FY2025; new.
22	Jdsat Inc. Top agencies Navy (Department of the Navy)	$5,440,289	0.9%	Rank history: not on the FY2021–FY2022 lists, #27 in FY2024 and not on the FY2025 list; new.
23	Exponent Inc. Top agencies DOS (Department of State)	$5,135,001	0.9%	Rank history: #25 in FY2021, #19 in FY2022, #21 in FY2024 and not on the FY2025 list; down 4 since FY2022.
24	HP Enterprise Services LLC Through Peraton Inc. Top agencies DHRA (Defense Human Resources Activity)	$5,019,259	0.9%	Rank history: not on the FY2021 list, #17 in FY2022 and not on the FY2024–FY2025 lists; down 7 since FY2022.
25	Sugpiat Defense, LLC Top agencies DHA (Defense Health Agency)	$4,279,046	0.7%	Rank history: not on the FY2021 list, #27 in FY2022, #26 in FY2024 and #25 in FY2025; up 2 since FY2022.
26	Iva'al / Nais Technologies LLC Top agencies DHS (Department of Homeland Security)	$4,255,663	0.7%	Rank history: not on the FY2021 list, #20 in FY2022, #25 in FY2024 and not on the FY2025 list; down 6 since FY2022.
27	National Academy of Sciences Top agencies HHS (Department of Health and Human Services) Army (Department of the Army) DHS (Department of Homeland Security)	$4,178,191	0.7%	Rank history: #39 in FY2021, not on the FY2022 list, #78 in FY2024 and #77 in FY2025; returned.
28	Data Recognition Corporation Top agencies DHRA (Defense Human Resources Activity)	$3,991,887	0.7%	Rank history: not on the FY2021 list, #93 in FY2022, #36 in FY2024 and #20 in FY2025; up 65 since FY2022.
29	Guidehouse Inc. 2 awardees Top agencies DHS (Department of Homeland Security) DOJ (Department of Justice)	$3,890,925	0.7%	Rank history: #21 in FY2021, #12 in FY2022, #43 in FY2024 and not on the FY2025 list; down 17 since FY2022.
30	D&G Support Services LLC Top agencies DHS (Department of Homeland Security)	$3,837,345	0.7%	Rank history: not on the FY2021–FY2022 lists, #44 in FY2024 and #35 in FY2025; new.
31	Deloitte LLP 2 awardees, including Deloitte Consulting LLP Top agencies DHS (Department of Homeland Security) DOT (Department of Transportation)	$3,556,376	0.6%	Rank history: #9 in FY2021, #50 in FY2022 and not on the FY2024–FY2025 lists; up 19 since FY2022.
32	ABT Global LLC 2 awardees Top agencies HHS (Department of Health and Human Services)	$3,434,462	0.6%	Rank history: #18 in FY2021, #39 in FY2022 and not on the FY2024–FY2025 lists; up 7 since FY2022.
33	Cherokee Insights LLC Top agencies USAF (Department of the Air Force)	$3,423,426	0.6%	Rank history: #36 in FY2021, #33 in FY2022, #30 in FY2024 and #32 in FY2025; unchanged since FY2022.
34	Iproov Limited Top agencies DHS (Department of Homeland Security)	$3,300,000	0.6%	Rank history: not on the FY2021–FY2022 lists, #40 in FY2024 and #29 in FY2025; new.
35	Innovative Technology Solutions JV, LLC Top agencies USAF (Department of the Air Force)	$3,053,141	0.5%	Rank history: not on the FY2021–FY2022 lists, #41 in FY2024 and #55 in FY2025; new.
36	Eagle Harbor, LLC Top agencies DOJ (Department of Justice)	$3,033,392	0.5%	Rank history: not on the FY2021–FY2022 lists, #33 in FY2024 and #26 in FY2025; new.
37	The Survice Engineering Company LLC Top agencies DFAS (Defense Finance and Accounting Service)	$2,896,034	0.5%	Rank history: not on the FY2021 list, #45 in FY2022, #46 in FY2024 and #41 in FY2025; up 8 since FY2022.
38	Firebird Analytical Solutions & Technologies Inc. Top agencies DHS (Department of Homeland Security)	$2,491,532	0.4%	Rank history: #35 in FY2021, #58 in FY2022 and not on the FY2024–FY2025 lists; up 20 since FY2022.
39	Sofware LLC Top agencies USSOCOM (United States Special Operations Command)	$2,401,680	0.4%	Rank history: #41 in FY2021, #36 in FY2022 and not on the FY2024–FY2025 lists; down 3 since FY2022.
40	TMP Government LLC Top agencies OPM (Office of Personnel Management)	$2,392,588	0.4%	Rank history: #66 in FY2021, #74 in FY2022 and not on the FY2024–FY2025 lists; up 34 since FY2022.
41	BDO USA LLP Through BDO Public Sector, LLC Top agencies VA (Department of Veterans Affairs)	$2,374,119	0.4%	Rank history: #48 in FY2021, #40 in FY2022, #48 in FY2024 and not on the FY2025 list; down 1 since FY2022.
42	Inalab Consulting Inc. Top agencies Army (Department of the Army)	$2,351,020	0.4%	Rank history: #57 in FY2021, #44 in FY2022, #77 in FY2024 and not on the FY2025 list; up 2 since FY2022.
43	Group W Inc. Top agencies Army (Department of the Army)	$2,343,999	0.4%	Rank history: #52 in FY2021, #42 in FY2022, #42 in FY2024 and #49 in FY2025; down 1 since FY2022.
44	Advanced Systems Technology & Management Inc. Top agencies USAF (Department of the Air Force)	$2,322,225	0.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
45	James Bell Associates Inc. Top agencies HHS (Department of Health and Human Services)	$2,322,215	0.4%	Rank history: #51 in FY2021, #48 in FY2022 and not on the FY2024–FY2025 lists; up 3 since FY2022.
46	Mathematica Inc 2 awardees Top agencies HHS (Department of Health and Human Services) USDA (Department of Agriculture)	$2,199,271	0.4%	Rank history: #20 in FY2021, #16 in FY2022 and not on the FY2024–FY2025 lists; down 30 since FY2022.
47	Child Trends, Incorporated Top agencies HHS (Department of Health and Human Services)	$2,184,280	0.4%	Rank history: #33 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
48	ICF International, Inc. 2 awardees, including ICF Incorporated, L.L.C. and ICF Macro Inc. Top agencies HHS (Department of Health and Human Services) DOL (Department of Labor) DOT (Department of Transportation)	$2,119,310	0.4%	Rank history: #94 in FY2021, #30 in FY2022 and not on the FY2024–FY2025 lists; down 18 since FY2022.
49	National Opinion Research Center Top agencies SEC (Securities and Exchange Commission) DOL (Department of Labor) HHS (Department of Health and Human Services)	$2,070,085	0.4%	Rank history: #84 in FY2021, #22 in FY2022, not on the FY2024 list and #23 in FY2025; down 27 since FY2022.
50	JP Systems, Inc. Top agencies VA (Department of Veterans Affairs)	$1,988,303	0.3%	Rank history: #6 in FY2021, #23 in FY2022, #55 in FY2024 and #15 in FY2025; down 27 since FY2022.
51	Tecolote Research, Inc. Top agencies DHS (Department of Homeland Security)	$1,967,273	0.3%	Rank history: #42 in FY2021, #34 in FY2022, #60 in FY2024 and #47 in FY2025; down 17 since FY2022.
52	Gartner, Inc. 2 awardees Top agencies Army (Department of the Army) USDA (Department of Agriculture) USAF (Department of the Air Force)	$1,960,703	0.3%	Rank history: not on the FY2021 list, #70 in FY2022, #51 in FY2024 and #39 in FY2025; up 18 since FY2022.
53	LMI Consulting, LLC Top agencies USAF (Department of the Air Force)	$1,847,417	0.3%	Rank history: not on the FY2021–FY2022 lists, #82 in FY2024 and #96 in FY2025; up 51 since FY2022.
54	Aermor LLC Top agencies Navy (Department of the Navy)	$1,844,922	0.3%	Rank history: #65 in FY2021, #47 in FY2022, #66 in FY2024 and #61 in FY2025; down 7 since FY2022.
55	Eastern Research Group Inc. Top agencies DOL (Department of Labor)	$1,806,557	0.3%	Rank history: not on the FY2021 list, #60 in FY2022 and not on the FY2024–FY2025 lists; up 5 since FY2022.
56	Kpmg L.L.P. Top agencies HUD (Department of Housing and Urban Development)	$1,796,264	0.3%	Rank history: not on the FY2021 list, #49 in FY2022, #63 in FY2024 and not on the FY2025 list; down 7 since FY2022.
57	Ellos Global LLC Top agencies DHS (Department of Homeland Security)	$1,791,793	0.3%	Rank history: not on the FY2021–FY2022 lists, #59 in FY2024 and not on the FY2025 list; new.
58	Linquest Corporation 2 awardees Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$1,666,671	0.3%	Rank history: #40 in FY2021, #52 in FY2022, #87 in FY2024 and not on the FY2025 list; down 6 since FY2022.
59	Metrics, LLC Top agencies VA (Department of Veterans Affairs)	$1,389,658	0.2%	Rank history: #70 in FY2021, #73 in FY2022 and not on the FY2024–FY2025 lists; up 14 since FY2022.
60	C5T Corporation Top agencies USTRANSCOM (Department of Defense United States Transportation Command)	$1,356,417	0.2%	Rank history: #83 in FY2021, #63 in FY2022, not on the FY2024 list and #57 in FY2025; up 3 since FY2022.
61	Insight Policy Research Inc Top agencies DOL (Department of Labor) DHRA (Defense Human Resources Activity) USDA (Department of Agriculture)	$1,306,860	0.2%	Rank history: #72 in FY2021, #65 in FY2022 and not on the FY2024–FY2025 lists; up 4 since FY2022.
62	Nemean Solutions LLC Top agencies Army (Department of the Army)	$1,292,489	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
63	Aleto, Inc. Top agencies DHA (Defense Health Agency)	$1,288,268	0.2%	Rank history: #63 in FY2021, #67 in FY2022, #68 in FY2024 and not on the FY2025 list; up 4 since FY2022.
64	American Institutes for Research In the Behavioral Sciences 2 awardees Top agencies IMLS (The Institute of Museum and Library Services) HHS (Department of Health and Human Services)	$1,275,087	0.2%	Rank history: #90 in FY2021, #56 in FY2022, #11 in FY2024 and #8 in FY2025; down 8 since FY2022.
65	Infotrend Incorporated Top agencies SEC (Securities and Exchange Commission)	$1,249,798	0.2%	Rank history: #67 in FY2021, #68 in FY2022, #84 in FY2024 and #72 in FY2025; up 3 since FY2022.
66	The Cadmus Group LLC Top agencies EPA (Environmental Protection Agency) DOJ (Department of Justice)	$1,226,313	0.2%	Rank history: #17 in FY2021, #14 in FY2022 and not on the FY2024–FY2025 lists; down 52 since FY2022.
67	Kingfisher Systems, Inc. Top agencies DOT (Department of Transportation)	$1,216,976	0.2%	Rank history: not on the FY2021 list, #82 in FY2022, #69 in FY2024 and #59 in FY2025; up 15 since FY2022.
68	Contracting Resources Group Inc Top agencies DHA (Defense Health Agency)	$1,203,278	0.2%	Rank history: not on the FY2021–FY2022 lists, #62 in FY2024 and #52 in FY2025; new.
69	Health Research and Analysis, LLC Top agencies HHS (Department of Health and Human Services)	$1,196,133	0.2%	Rank history: #64 in FY2021, #75 in FY2022, not on the FY2024 list and #74 in FY2025; up 6 since FY2022.
70	Explore Digits Inc Top agencies HHS (Department of Health and Human Services)	$1,172,273	0.2%	Rank history: not on the FY2021–FY2022 lists, #52 in FY2024 and #64 in FY2025; new.
71	Technomics Inc. Top agencies DHS (Department of Homeland Security)	$1,149,571	0.2%	Rank history: not on the FY2021–FY2022 lists, #74 in FY2024 and #86 in FY2025; up 43 since FY2022.
72	Avening Management and Technical Services, LLC Top agencies Navy (Department of the Navy)	$1,077,259	0.2%	Rank history: not on the FY2021 list, #76 in FY2022, #94 in FY2024 and not on the FY2025 list; up 4 since FY2022.
73	Kalman & Company Inc. Top agencies DHS (Department of Homeland Security)	$956,170	0.2%	Rank history: not on the FY2021–FY2022 lists, #92 in FY2024 and not on the FY2025 list; new.
74	Mdrc Top agencies DOL (Department of Labor)	$949,008	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
75	Vector Psychometric Group, LLC Top agencies VA (Department of Veterans Affairs)	$928,224	0.2%	Rank history: not on the FY2021–FY2022 lists, #81 in FY2024 and #94 in FY2025; new.
76	Kaihonua LLC Top agencies DHA (Defense Health Agency)	$903,484	0.2%	Rank history: #45 in FY2021, #43 in FY2022, #71 in FY2024 and #62 in FY2025; down 33 since FY2022.
77	DRT Strategies, Inc. Top agencies HHS (Department of Health and Human Services)	$858,724	0.1%	Rank history: not on the FY2021–FY2022 lists, #72 in FY2024 and not on the FY2025 list; new.
78	Oil Price Information Service LLC Through IHS Global Inc. Top agencies HHS (Department of Health and Human Services)	$833,053	0.1%	Rank history: #85 in FY2021, #62 in FY2022 and not on the FY2024–FY2025 lists; down 16 since FY2022.
79	2M Research Services LLC Top agencies SBA (Small Business Administration)	$825,812	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 24 since FY2022.
80	Human Services Research Institute Top agencies HHS (Department of Health and Human Services)	$825,000	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
81	Oregon Health & Science University Top agencies VA (Department of Veterans Affairs)	$820,014	0.1%	Rank history: #100 in FY2021, #98 in FY2022 and not on the FY2024–FY2025 lists; up 17 since FY2022.
82	Quantics Incorporated Top agencies Navy (Department of the Navy)	$816,219	0.1%	Rank history: #81 in FY2021, #87 in FY2022 and not on the FY2024–FY2025 lists; up 5 since FY2022.
83	IT Data Consulting L.L.C. Top agencies HUD (Department of Housing and Urban Development)	$812,954	0.1%	Rank history: not on the FY2021–FY2022 lists, #80 in FY2024 and #69 in FY2025; new.
84	Bowhead Program Management & Operations, LLC Top agencies Navy (Department of the Navy)	$798,436	0.1%	Rank history: not on the FY2021–FY2022 lists, #37 in FY2024 and #16 in FY2025; new.
85	Jefferson Consulting Group LLC Top agencies DOT (Department of Transportation)	$724,667	0.1%	Rank history: not on the FY2021 list, #94 in FY2022 and not on the FY2024–FY2025 lists; up 9 since FY2022.
86	Cognitive Medical Systems, Inc. Top agencies VA (Department of Veterans Affairs)	$711,556	0.1%	Rank history: #73 in FY2021, #25 in FY2022 and not on the FY2024–FY2025 lists; down 61 since FY2022.
87	Totally Joined for Achieving Collaborative Techniques (Tjfact), LLC Top agencies Army (Department of the Army)	$680,370	0.1%	Rank history: #79 in FY2021, #83 in FY2022, #86 in FY2024 and #79 in FY2025; down 4 since FY2022.
88	Claxton Logistics Services LLC Top agencies Army (Department of the Army)	$672,178	0.1%	Rank history: #82 in FY2021, #90 in FY2022, #85 in FY2024 and #84 in FY2025; up 2 since FY2022.
89	Optimal Solutions Group, L.l.c Top agencies SBA (Small Business Administration)	$607,625	0.1%	Rank history: #99 in FY2021, #77 in FY2022 and not on the FY2024–FY2025 lists; down 12 since FY2022.
90	Solutions for Information Design, Inc. Top agencies DHS (Department of Homeland Security)	$564,685	0.1%	Rank history: #86 in FY2021, #91 in FY2022, not on the FY2024 list and #66 in FY2025; up 1 since FY2022.
91	Compagnie Merieux Alliance Through Advanced Bioscience Laboratories, Inc. Top agencies HHS (Department of Health and Human Services)	$534,000	0.1%	Rank history: #97 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 15 since FY2022.
92	Prevailance Inc. Top agencies Navy (Department of the Navy)	$513,208	0.1%	Rank history: not on the FY2021 list, #89 in FY2022, #98 in FY2024 and #76 in FY2025; down 3 since FY2022.
93	Techtrans International Inc. Top agencies WHS (DOD Washington Headquarters Service) DOS (Department of State)	$508,884	0.1%	Rank history: not on the FY2021–FY2022 lists, #96 in FY2024 and not on the FY2025 list; up 25 since FY2022.
94	Tamr Inc. Through Tamr Government Solutions, Inc. Top agencies DHS (Department of Homeland Security)	$500,000	0.1%	Rank history: not on the FY2021 list, #72 in FY2022 and not on the FY2024–FY2025 lists; down 22 since FY2022.
95	Tier TECH International, Inc. Top agencies DHS (Department of Homeland Security)	$480,360	0.1%	Rank history: #31 in FY2021, #69 in FY2022 and not on the FY2024–FY2025 lists; down 26 since FY2022.
96	BDR Solutions, LLC Top agencies VA (Department of Veterans Affairs)	$464,854	0.1%	Rank history: #95 in FY2021, #97 in FY2022 and not on the FY2024–FY2025 lists; up 1 since FY2022.
97	Westat, Inc. Top agencies USDA (Department of Agriculture)	$463,453	0.1%	Rank history: #44 in FY2021, #92 in FY2022, #22 in FY2024 and #53 in FY2025; down 5 since FY2022.
98	Idea-Tek, LLC Top agencies Army (Department of the Army)	$433,225	0.1%	Rank history: not on the FY2021 list, #55 in FY2022 and not on the FY2024–FY2025 lists; down 43 since FY2022.
99	Guardian Defense Group, Inc. Top agencies Navy (Department of the Navy)	$371,000	0.1%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #81 in FY2025; new.
100	Business Development Associates, LLC Top agencies EOP (Executive Office of the President)	$366,487	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.

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100 of 213 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 $576 million obligated before deobligations, so they never pass 100%.
Parent companies: each action counts under the ultimate parent its award record names, or under the awardee when it names none, so no dollar counts twice. Parents of the same name (Inc., LLC and the like aside) count as one company, since FPDS records a company's parent under more than one UEI over time. GovTribe corrects a few parents and names by hand; see the corrections.
Fiscal year 2023 ran Oct 1, 2022 – Sep 30, 2023. The Department of Defense reports its contract actions to FPDS about 90 days late, so a fiscal year is ranked once they're in, in February, and the list doesn't change after.
Rank changes compare with FY2022. "New" marks a company outside that period's top 500, and "Returned" one of those that was on an earlier fiscal year's list.
Rank lines show each company's rank on every fiscal year's list since FY2021, #1 at the top, on a scale that gives the top of the list more room. A dashed stretch spans years it wasn't on the list. The step from FY2022 takes the color of the rank change beside it.
Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

Quick answers

Who were the top 10 PSC R405 contractors in FY2023?

1. Leidos Holdings, Inc. ($97.7M), 2. Applied Research Associates, Inc. ($46.4M), 3. Kbr, Inc. ($33.2M), 4. Booz Allen Hamilton Holding Corporation ($22.9M), 5. Koniag, Inc. ($19M), 6. Yulista Solutions, LLC ($16.8M), 7. The Mitre Corporation ($16.2M), 8. Deloitte Consulting LLP ($16.1M), 9. Changeis, Inc. ($15.7M), 10. The Johns Hopkins University ($15.6M).

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