Top 100 Contractors in PSC R4: Professional Services, FY2025

Parent companies by net contract obligations Oct 1, 2024 – Sep 30, 2025 Code page on GovTribe

The top 10 won 21% of FY2025 PSC R4 contract dollars

Ranking facts

Contract obligations
$76,971,331,928 Net of deobligations, by contracts coded PSC R4 or a code under it
Contractors
10,497 Parent companies with an obligation
Largest contractor
Booz Allen Hamilton Holding Corporation $3.3 billion, 3.8% of obligations
Data as of

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
Booz Allen Hamilton Holding Corporation 10 awardees, including Booz Allen Hamilton Inc., Ultra Electronics Advanced Tactical Systems Inc. and Thunderyard Liberty JV LLC
Top agencies
$3,298,335,037
Rank history: #1 in FY2021, #1 in FY2022, #1 in FY2023 and #1 in FY2024; unchanged since FY2024.
2
The Boeing Company 23 awardees, including Boeing Sikorsky Aircraft Support, LLC
Top agencies
$2,483,786,265
Rank history: #2 in FY2021, #3 in FY2022, #2 in FY2023 and #2 in FY2024; unchanged since FY2024.
3
CACI International Inc. 17 awardees, including Caci, Inc. - Federal, Caci Technologies, LLC and Caci Nss, LLC
Top agencies
$1,906,303,520
Rank history: #13 in FY2021, #10 in FY2022, #6 in FY2023 and #7 in FY2024; up 4 since FY2024.
4
General Dynamics Corporation 26 awardees, including General Dynamics Information Technology, Inc., General Dynamics Land Systems Inc. and General Dynamics Global Force, LLC
Top agencies
$1,767,815,921
Rank history: #5 in FY2021, #4 in FY2022, #3 in FY2023 and #3 in FY2024; down 1 since FY2024.
5
Lockheed Martin Corporation 34 awardees, including Lockheed Martin Services, LLC
Top agencies
$1,503,513,804
Rank history: #11 in FY2021, #7 in FY2022, #5 in FY2023 and #6 in FY2024; up 1 since FY2024.
6
Deloitte 3 awardees, including Deloitte Consulting LLP, Deloitte & Touche LLP and Deloitte Financial Advisory Services LLP
Top agencies
$1,479,684,635
Rank history: #6 in FY2021, #11 in FY2022, #11 in FY2023 and #4 in FY2024; down 2 since FY2024.
7
Science Applications International Corporation 7 awardees, including Forfeiture Support Associates LLC
Top agencies
$1,476,525,324
Rank history: #7 in FY2021, #5 in FY2022, #4 in FY2023 and #5 in FY2024; down 2 since FY2024.
8
Amentum Holdings, Inc. 18 awardees, including Amentum Services, Inc., JT4 LLC and Amentum Technology, Inc.
Top agencies
$1,449,025,048
Rank history: not on the FY2021–FY2023 lists and #78 in FY2024; up 70 since FY2024.
9
Northrop Grumman Systems Corporation 42 awardees
Top agencies
$1,444,566,683
Rank history: #8 in FY2021, #9 in FY2022, #7 in FY2023 and #10 in FY2024; up 1 since FY2024.
10
Leidos Holdings, Inc. 20 awardees, including Leidos, Inc., Hanford Mission Integration Solutions, LLC and Dynetics, Inc.
Top agencies
$1,307,386,805
Rank history: #9 in FY2021, #12 in FY2022, #10 in FY2023 and #9 in FY2024; down 1 since FY2024.
11
The Aerospace Corporation
Top agencies
$1,248,942,456
Rank history: #12 in FY2021, #13 in FY2022, #9 in FY2023 and #11 in FY2024; unchanged since FY2024.
12
RTX Corporation 47 awardees, including Raytheon Company, Range Generation Next LLC and Rockwell Collins, Inc.
Top agencies
$1,213,749,180
Rank history: not on the FY2021–FY2023 lists and #13 in FY2024; up 1 since FY2024.
13
Chemonics International, Inc.
Top agencies
$1,209,847,139
Rank history: #4 in FY2021, #6 in FY2022, #8 in FY2023 and #8 in FY2024; down 5 since FY2024.
14
Huntington Ingalls Industries, Inc. 7 awardees, including HII Mission Technologies Corp, HII Technical Solutions Corporation and HII Fleet Support Group LLC
Top agencies
$1,082,523,167
Rank history: #54 in FY2021, #27 in FY2022, #21 in FY2023 and #12 in FY2024; down 2 since FY2024.
15
Savannah River Mission Completion, LLC
Top agencies
$1,062,510,600
Rank history: not on the FY2021 list, #19 in FY2022, #16 in FY2023 and #16 in FY2024; up 1 since FY2024.
16
Maximus Federal Services, Inc.
Top agencies
$944,287,841
Rank history: not on the FY2021–FY2023 lists and #20 in FY2024; up 4 since FY2024.
17
Parsons Corporation 8 awardees, including Parsons Government Services Inc., Xator LLC and Altamira Technologies Corp
Top agencies
$930,659,806
Rank history: #22 in FY2021, #22 in FY2022, #19 in FY2023 and #19 in FY2024; up 2 since FY2024.
18
BAE Systems 19 awardees, including BAE Systems Land & Armaments L.P., BAE Systems Technology Solutions & Services Inc. and BAE Systems Information and Electronic Systems Integration Inc.
Top agencies
$898,621,098
Rank history: #25 in FY2021, #20 in FY2022, #15 in FY2023 and #23 in FY2024; up 5 since FY2024.
19
Serco Inc 3 awardees
Top agencies
$862,394,783
Rank history: not on the FY2021–FY2022 lists, #44 in FY2023 and #18 in FY2024; down 1 since FY2024.
20
Accenture Federal Services LLC 5 awardees, including Cognosante MVH LLC and Cognosante, LLC
Top agencies
$849,877,510
Rank history: not on the FY2021–FY2023 lists and #17 in FY2024; down 3 since FY2024.
21
Astrion Group, LLC 5 awardees, including Beyond New Horizons, LLC, Oasis Systems, LLC and Axient LLC
Top agencies
$845,550,513
Rank history: not on the FY2021–FY2024 lists; up 270 since FY2024.
22
The Mitre Corporation 2 awardees
Top agencies
$825,952,749
Rank history: #15 in FY2021, #14 in FY2022, #12 in FY2023 and #14 in FY2024; down 8 since FY2024.
23
Smartronix, LLC
Top agencies
$642,192,534
Rank history: not on the FY2021–FY2023 lists and #33 in FY2024; up 10 since FY2024.
24
L3Harris Technologies, Inc. 30 awardees, including L3Harris Technologies Integrated Systems L.P., L3 Technologies, Inc. and L3Harris Forcex, Inc.
Top agencies
$604,480,648
Rank history: #17 in FY2021, #16 in FY2022, #17 in FY2023 and #24 in FY2024; unchanged since FY2024.
25
Govcio, LLC 3 awardees, including Salient Crgt, Inc. and Soldierpoint Digital Health, LLC
Top agencies
$562,679,686
Rank history: not on the FY2021 list, #67 in FY2022, #99 in FY2023 and not on the FY2024 list; up 91 since FY2024.
26
Tetra Tech, Inc. 25 awardees, including Halvik LLC, LS Technologies LLC and Tetra TECH ES, Inc.
Top agencies
$530,185,368
Rank history: #28 in FY2021, #26 in FY2022, #27 in FY2023 and #25 in FY2024; down 1 since FY2024.
27
Systems Planning and Analysis, Inc. 6 awardees, including Intrepid LLC, Schafer Government Services, LLC and Prkk LLC
Top agencies
$492,627,849
Rank history: #93 in FY2021, #78 in FY2022, #60 in FY2023 and #53 in FY2024; up 26 since FY2024.
28
Arctic Slope Regional Corporation 25 awardees, including Agile Decision Sciences, LLC, Netcentric Technology, LLC and Asrc Federal System Solutions LLC
Top agencies
$482,734,201
Rank history: #48 in FY2021, #53 in FY2022, #64 in FY2023 and #48 in FY2024; up 20 since FY2024.
29
Peraton Inc. 4 awardees, including Peraton Enterprise Solutions LLC, Safeguard Services LLC and Dhpc Technologies, Inc.
Top agencies
$482,567,715
Rank history: not on the FY2021–FY2023 lists and #31 in FY2024; up 2 since FY2024.
30
V2X, Inc. 6 awardees, including V2X Aerospace LLC, V2X Systems LLC and Vertex Modernization and Sustainment LLC
Top agencies
$480,024,146
Rank history: not on the FY2021–FY2023 lists and #62 in FY2024; up 32 since FY2024.
31
KBR Wyle Services LLC 8 awardees, including KBR Services, LLC and Kord Technologies, LLC
Top agencies
$447,256,675
Rank history: not on the FY2021–FY2023 lists and #32 in FY2024; up 1 since FY2024.
32
General Atomics Aeronautical Systems, Inc.
Top agencies
$442,014,505
Rank history: not on the FY2021–FY2024 lists; up 69 since FY2024.
33
CGI Federal Inc. 4 awardees, including Sehlke Consulting LLC and Manufacturing Technical Solutions, LLC
Top agencies
$418,852,306
Rank history: not on the FY2021–FY2023 lists and #43 in FY2024; up 10 since FY2024.
34
Leonardo S.p.A. 7 awardees, including DRS Sustainment Systems, Inc., Laurel Technologies Partnership and DRS Network & Imaging Systems LLC
Top agencies
$407,278,652
Rank history: #85 in FY2021, #88 in FY2022, #41 in FY2023 and #57 in FY2024; up 23 since FY2024.
35
Guidehouse Inc. 7 awardees, including Peraton Technology Services Inc., Guidehouse Digital LLC and Aptim Federal Services, LLC
Top agencies
$405,185,837
Rank history: not on the FY2021–FY2024 lists; up 86 since FY2024.
36
ManTech International Corporation 6 awardees, including Mantech Advanced Systems International, Inc., Cloudpareto LLC and Tapestry Technologies, Inc.
Top agencies
$356,253,728
Rank history: #18 in FY2021, #18 in FY2022, #42 in FY2023 and #47 in FY2024; up 11 since FY2024.
37
Cherokee Nation 16 awardees, including Cherokee Nation Strategic Programs, L.L.C., Criterion Systems, L.L.C. and Cherokee Nation System Solutions LLC
Top agencies
$347,373,135
Rank history: #67 in FY2021, #80 in FY2022, #78 in FY2023 and not on the FY2024 list; up 345 since FY2024.
38
Odyssey Systems Consulting Group, Ltd.
Top agencies
$341,366,949
Rank history: not on the FY2021–FY2024 lists; up 391 since FY2024.
39
The Chenega Corporation 31 awardees, including Chenega Global Protection, LLC, Chenega Enterprise Systems & Solutions, LLC and C2 Alaska, LLC
Top agencies
$326,197,885
Rank history: not on the FY2021–FY2024 lists; new.
40
Torch Technologies Inc.
Top agencies
$307,764,811
Rank history: #31 in FY2021, #51 in FY2022, #43 in FY2023 and #46 in FY2024; up 6 since FY2024.
41
UnitedHealth Group Incorporated 5 awardees, including Optumrx Administrative Services, LLC, Optumhealth Care Solutions, LLC and Optumserve Technology Services, Inc.
Top agencies
$299,952,629
Rank history: #90 in FY2021, #75 in FY2022, not on the FY2023 list and #44 in FY2024; up 3 since FY2024.
42
Microsoft Corporation
Top agencies
$285,757,275
Rank history: #45 in FY2021, #49 in FY2022, #50 in FY2023 and #36 in FY2024; down 6 since FY2024.
43
The GEO Group, Inc. 2 awardees, including B.i. Incorporated
Top agencies
$277,289,603
Rank history: #42 in FY2021, #31 in FY2022, #29 in FY2023 and #34 in FY2024; down 9 since FY2024.
44
Olin Corporation Through Olin Winchester LLC
Top agencies
$273,456,828
Rank history: not on the FY2021–FY2023 lists and #15 in FY2024; down 29 since FY2024.
45
Clark Construction Group LLC
Top agencies
$262,369,041
Rank history: not on the FY2021–FY2024 lists; new.
46
Acacia Center for Justice
Top agencies
$261,192,647
Rank history: not on the FY2021–FY2023 lists and #35 in FY2024; down 11 since FY2024.
47
LMI Consulting, LLC
Top agencies
$256,171,931
Rank history: not on the FY2021 list, #68 in FY2022, #74 in FY2023 and #38 in FY2024; down 9 since FY2024.
48
Bristol Bay Native Corporation 24 awardees, including Eagle Integrated Services, LLC, STS Systems Defense LLC and STS Government Solutions, LLC
Top agencies
$253,300,702
Rank history: not on the FY2021–FY2024 lists; new.
49
Koniag, Inc. 15 awardees, including Koniag Data Solutions LLC, Koniag Professional Services, LLC and Kadiak LLC
Top agencies
$244,316,096
Rank history: #84 in FY2021, #63 in FY2022, #58 in FY2023 and not on the FY2024 list; up 291 since FY2024.
50
Ukpeagvik Inupiat Corporation 16 awardees, including Bowhead Program Management & Operations, LLC, Bowhead Enterprise, Science and Technology, LLC and Bowhead Weapons Development Solutions LLC
Top agencies
$242,391,346
Rank history: not on the FY2021–FY2024 lists; new.
51
The Boston Consulting Group Inc. 2 awardees, including BCG Federal Corp.
Top agencies
$242,053,833
Rank history: not on the FY2021–FY2024 lists; new.
52
Noblis, Inc. 2 awardees, including Noblis MSD LLC
Top agencies
$235,677,651
Rank history: #62 in FY2021, #50 in FY2022, #46 in FY2023 and #58 in FY2024; up 6 since FY2024.
53
DAI Global LLC
Top agencies
$226,097,124
Rank history: #43 in FY2021, #37 in FY2022, #30 in FY2023 and #28 in FY2024; down 25 since FY2024.
54
Ernst & Young LLP 3 awardees, including Dignari, LLC
Top agencies
$225,087,611
Rank history: not on the FY2021–FY2023 lists and #65 in FY2024; up 11 since FY2024.
55
Family Health International
Top agencies
$222,116,896
Rank history: not on the FY2021–FY2024 lists; up 183 since FY2024.
56
International Business Machines Corporation 5 awardees
Top agencies
$220,959,518
Rank history: #47 in FY2021, #44 in FY2022, #49 in FY2023 and #50 in FY2024; down 6 since FY2024.
57
Scientific Research Corporation
Top agencies
$220,150,834
Rank history: not on the FY2021–FY2023 lists and #64 in FY2024; up 7 since FY2024.
58
ABT Global LLC 3 awardees, including Technology Solutions Provider, LLC
Top agencies
$218,900,192
Rank history: #32 in FY2021, #40 in FY2022, #48 in FY2023 and #45 in FY2024; down 13 since FY2024.
59
Fluor Corporation Through Fluor Federal Services Inc.
Top agencies
$206,604,488
Rank history: not on the FY2021–FY2022 lists, #91 in FY2023 and #77 in FY2024; up 18 since FY2024.
60
Credence Management Solutions Limited Liability Company
Top agencies
$203,603,059
Rank history: #68 in FY2021, #57 in FY2022, #52 in FY2023 and #49 in FY2024; down 11 since FY2024.
61
Acuity International LLC 6 awardees, including Sallyport Global Holdings Inc., Acuity - Janus Global, LLC and Kci-Acuity, LLC
Top agencies
$194,933,809
Rank history: not on the FY2021–FY2024 lists; new.
62
Nana Regional Corporation, Inc. 15 awardees, including Rivertech LLC, Akima Systems Engineering LLC and Akima Data Management LLC
Top agencies
$187,714,587
Rank history: not on the FY2021–FY2024 lists; new.
63
Sev1Tech, LLC
Top agencies
$185,129,267
Rank history: #76 in FY2021, #82 in FY2022, #73 in FY2023 and #80 in FY2024; up 17 since FY2024.
64
SRC Inc. 2 awardees
Top agencies
$184,003,773
Rank history: not on the FY2021 list, #96 in FY2022, #65 in FY2023 and #41 in FY2024; down 23 since FY2024.
65
Afognak Native Corporation 9 awardees, including Alutiiq Essential Services LLC, Mccallie Associates, Inc. and Shields Point LLC
Top agencies
$182,814,594
Rank history: #98 in FY2021, #94 in FY2022 and not on the FY2023–FY2024 lists; returned.
66
Research Triangle Institute
Top agencies
$179,716,828
Rank history: #39 in FY2021, #46 in FY2022, #39 in FY2023 and #30 in FY2024; down 36 since FY2024.
67
Intuitive Research and Technology Corporation 2 awardees
Top agencies
$178,976,740
Rank history: #71 in FY2021 and not on the FY2022–FY2024 lists; up 174 since FY2024.
68
Johns Hopkins University 4 awardees, including The Johns Hopkins University Applied Physics Laboratory LLC, The Johns Hopkins Health System Corporation and Johns Hopkins Bayview Medical Center, Inc.
Top agencies
$175,026,074
Rank history: not on the FY2021–FY2024 lists; new.
69
Kbr, Inc. 4 awardees, including Linquest Corporation and Capability Analysis & Measurement Organization LLC
Top agencies
$170,823,957
Rank history: #24 in FY2021, #28 in FY2022, #24 in FY2023 and #87 in FY2024; up 18 since FY2024.
70
Path
Top agencies
$157,716,684
Rank history: not on the FY2021–FY2024 lists; new.
71
Precise Systems, Inc. 4 awardees, including Excet, LLC, Jardon & Howard Technologies LLC and Mission Focused Systems LLC
Top agencies
$152,675,537
Rank history: not on the FY2021–FY2022 lists, #86 in FY2023 and #75 in FY2024; up 4 since FY2024.
72
Carahsoft Technology Corp
Top agencies
$152,268,555
Rank history: not on the FY2021–FY2022 lists, #94 in FY2023 and #52 in FY2024; down 20 since FY2024.
73
Sigmatech Inc. 2 awardees
Top agencies
$146,746,803
Rank history: not on the FY2021–FY2023 lists and #79 in FY2024; up 6 since FY2024.
74
Trace Systems, Inc.
Top agencies
$146,158,457
Rank history: not on the FY2021–FY2024 lists; new.
75
Strategic Analysis, Inc.
Top agencies
$143,953,613
Rank history: not on the FY2021–FY2024 lists; up 28 since FY2024.
76
Inter-CON Security Systems Inc.
Top agencies
$141,992,202
Rank history: not on the FY2021–FY2023 lists and #97 in FY2024; up 21 since FY2024.
77
BC Partners LLP 2 awardees, including Gardaworld Federal Services LLC and Gardaworld North America
Top agencies
$140,185,206
Rank history: not on the FY2021–FY2023 lists and #86 in FY2024; up 9 since FY2024.
78
Oshkosh Corporation Through Oshkosh Defense LLC
Top agencies
$137,248,406
Rank history: not on the FY2021–FY2024 lists; new.
79
CQ JV, LLC
Top agencies
$134,101,332
Rank history: not on the FY2021–FY2024 lists; up 28 since FY2024.
80
Applied Research Associates, Inc.
Top agencies
$131,061,543
Rank history: not on the FY2021 list, #73 in FY2022, #56 in FY2023 and #72 in FY2024; down 8 since FY2024.
81
Valiant Global Defense Services Inc.
Top agencies
$130,909,339
Rank history: not on the FY2021–FY2024 lists; up 153 since FY2024.
82
ICF International Inc. 4 awardees, including ICF Incorporated, L.L.C. and Incentive Technology Group LLC
Top agencies
$128,279,012
Rank history: not on the FY2021–FY2023 lists and #61 in FY2024; down 21 since FY2024.
83
P E Systems, Inc.
Top agencies
$127,398,810
Rank history: not on the FY2021–FY2024 lists; up 86 since FY2024.
84
Modern Technology Solutions, Inc.
Top agencies
$126,586,643
Rank history: not on the FY2021–FY2024 lists; up 54 since FY2024.
85
Goldbelt, Incorporated 12 awardees, including Goldbelt Professional Services, LLC, Goldbelt C6, LLC and Goldbelt Nighthawk, LLC
Top agencies
$126,114,066
Rank history: not on the FY2021–FY2024 lists; new.
86
Mag DS Corp 2 awardees
Top agencies
$125,376,667
Rank history: #57 in FY2021, #42 in FY2022, #61 in FY2023 and not on the FY2024 list; up 245 since FY2024.
87
Dewberry Engineers Inc.
Top agencies
$125,272,862
Rank history: not on the FY2021–FY2024 lists; up 178 since FY2024.
88
Metrostar Systems, LLC
Top agencies
$122,586,170
Rank history: not on the FY2021–FY2024 lists; new.
89
Georgia TECH Research Corp 2 awardees, including Georgia TECH Applied Research Corp
Top agencies
$121,251,013
Rank history: #78 in FY2021, #74 in FY2022, #80 in FY2023 and not on the FY2024 list; returned.
90
Constellis, LLC 4 awardees, including Triple Canopy Inc., Centerra Group, LLC and American K-9 Detection Services, LLC
Top agencies
$116,032,668
Rank history: not on the FY2021–FY2024 lists; new.
91
360 Patriot Enterprises LLC
Top agencies
$113,850,418
Rank history: not on the FY2021–FY2024 lists; up 34 since FY2024.
92
Sierra Nevada Company, LLC 4 awardees
Top agencies
$111,539,164
Rank history: not on the FY2021–FY2024 lists; up 67 since FY2024.
93
Axle Informatics, LLC 2 awardees, including Gama-1 Technologies, LLC
Top agencies
$110,732,705
Rank history: not on the FY2021–FY2022 lists, #85 in FY2023 and not on the FY2024 list; up 27 since FY2024.
94
Ameresco Inc. 3 awardees, including Ameresco Select, Inc. and CMI Management, LLC
Top agencies
$109,221,771
Rank history: not on the FY2021–FY2024 lists; up 208 since FY2024.
95
DCS Corporation
Top agencies
$108,634,513
Rank history: #53 in FY2021, #54 in FY2022, #54 in FY2023 and #83 in FY2024; down 12 since FY2024.
96
QED Systems LLC
Top agencies
$108,023,929
Rank history: not on the FY2021–FY2024 lists; up 109 since FY2024.
97
Anduril Industries Inc. 3 awardees, including Area-I, LLC
Top agencies
$106,580,532
Rank history: not on the FY2021–FY2023 lists and #69 in FY2024; down 28 since FY2024.
98
Asgn Incorporated 2 awardees, including ECS Federal, LLC and Sewp Solutions LLC
Top agencies
$105,569,674
Rank history: not on the FY2021–FY2024 lists; up 53 since FY2024.
99
Bering Straits Native Corporation 11 awardees, including Arcticom, LLC, Pololei Solutions, LLC and Po`okela Solutions, LLC
Top agencies
$105,252,957
Rank history: not on the FY2021–FY2024 lists; new.
100
Kelly Services, Inc.
Top agencies
$104,900,222
Rank history: not on the FY2021–FY2024 lists; up 8 since FY2024.
Show 75 more

100 of 10,497 contractors listed here. See the rest on GovTribe.

Rankings for the codes under PSC R4

Code Net obligations Largest contractor
R425 Engineering and Technical Services $34,591,649,208 Lockheed Martin Corporation
R499 Other Professional Services $26,248,478,501 The Boeing Company
R408 Program Management/Support Services $8,933,091,967 Deloitte
R423 Intelligence Services $1,138,494,874 Smartronix, LLC
R430 Support – Professional: Physical Security and Badging $852,022,986 Inter-CON Security Systems Inc.
R410 Support – Professional: Program Evaluation/Review/Development $834,751,999 RTX Corporation
R429 Support – Professional: Emergency Response/Disaster Planning/Preparedness Support $653,847,951 Fluor Corporation
R418 Legal Services $650,952,417 Acacia Center for Justice
R426 Communications Services $575,224,790 General Dynamics Corporation
R405 Operations Research and Quantitative Analysis Services $375,526,517 Leidos Holdings, Inc.
R431 Support – Professional: Human Resources $365,680,977 Deloitte
R412 Simulation $233,882,342 CAE Inc.
R422 Market Research and Public Opinion Services (includes telephone and field interviews, focus testing, and surveys) $226,916,396 Westat, Inc.
R497 Personal Services Contracts $216,663,974 Research Triangle Institute
R424 Expert Witness $195,023,331 Georgia TECH Research Corp
R416 Veterinary/Animal Care Services $152,499,664 Priority One Services, Inc.
R406 Policy Review/Development Services $147,314,952 Ocean Bay Information and Systems Management, LLC
R427 Weather Reporting/Observation Services $138,904,918 Vero Technical Support Inc
R401 Personal Care Services (includes such services as barber and beauty shop, shoe repairs, tailoring, etc.) $78,186,987 Coastal Clinical & Management Services Inc
R420 Support – Professional: Certifications and Accreditations (Other Than Education or Information Technology C&A) $54,287,812 Joint Commission On Accreditation of Healthcare Organizations
R498 Patent and Trademark Services $53,583,850 CPA Global (Landon IP) Inc.
R402 Real Estate Brokerage Services $34,562,278 Vendor Resource Management, Inc.
R411 Real Property Appraisals Services (SIC 6531) $32,873,578 Colliers International Property Consultants Inc.
R428 Industrial Hygienics $12,877,277 Dgi-Ati II LLC
R404 Land Surveys, Cadastral Services (non-construction) $12,792,342 NV5 Global, Inc.

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 $85.9 billion 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.
  • Fiscal year 2025 ran Oct 1, 2024 – Sep 30, 2025. 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 FY2024. "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 FY2024 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 R4 contractors in FY2025?

1. Booz Allen Hamilton Holding Corporation ($3.3B), 2. The Boeing Company ($2.48B), 3. CACI International Inc. ($1.91B), 4. General Dynamics Corporation ($1.77B), 5. Lockheed Martin Corporation ($1.5B), 6. Deloitte ($1.48B), 7. Science Applications International Corporation ($1.48B), 8. Amentum Holdings, Inc. ($1.45B), 9. Northrop Grumman Systems Corporation ($1.44B), 10. Leidos Holdings, Inc. ($1.31B).

On GovTribe

Research every contractor on this list

  • Every contract, task order and IDV they hold
  • Their subsidiaries, teammates and competitors
  • Open opportunities they're positioned for
  • Alerts when they win new work
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