Top 100 Contractors in PSC R4: Professional Services, Aug 2025–Jul 2026
Parent companies by net contract obligations Aug 1, 2025 – Jul 31, 2026 Code page on GovTribe
The latest 12 months. See the newest fiscal year's list: Top Contractors in PSC R4: Professional Services, FY2025.
The top 10 won 22% of PSC R4 contract dollars from August 2025 through July 2026
Ranking facts
- Contract obligations
- $78,846,212,111 Net of deobligations, by contracts coded PSC R4 or a code under it
- Contractors
- 8,776 Parent companies with an obligation
- Largest contractor
- Booz Allen Hamilton Holding Corporation $3.31 billion, 3.9% 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 | $3,305,940,233 | |||
| 2 | $3,023,632,352 | |||
| 3 | $1,862,803,041 | |||
| 4 | $1,859,858,668 | |||
| 5 | $1,642,997,852 | |||
| 6 | $1,618,934,312 | |||
| 7 | $1,457,493,571 | |||
| 8 | $1,441,305,788 | |||
| 9 | $1,418,284,230 | |||
| 10 | $1,300,188,954 | |||
| 11 | $1,263,852,960 | |||
| 12 | $1,238,610,532 | |||
| 13 | $1,171,586,166 | |||
| 14 |
Accenture Federal Services LLC
|
$1,030,864,026 | ||
| 15 | $995,868,893 | |||
| 16 | $914,414,089 | |||
| 17 |
Guidehouse Inc.
|
$899,625,279 | ||
| 18 | $896,705,452 | |||
| 19 | $881,642,620 | |||
| 20 | $875,996,900 | |||
| 21 | $808,359,580 | |||
| 22 | $801,089,611 | |||
| 23 | $783,918,395 | |||
| 24 |
V2X, Inc.
|
$764,859,073 | ||
| 25 | $617,466,542 | |||
| 26 | $608,155,647 | |||
| 27 | $492,481,936 | |||
| 28 | $457,775,568 | |||
| 29 | $430,233,843 | |||
| 30 | $429,279,510 | |||
| 31 | $423,637,922 | |||
| 32 | $416,639,679 | |||
| 33 |
ManTech International Corporation
|
$391,910,968 | ||
| 34 | $378,372,837 | |||
| 35 | $377,086,768 | |||
| 36 | $357,938,283 | |||
| 37 | $351,202,600 | |||
| 38 | $350,808,713 | |||
| 39 | $343,445,028 | |||
| 40 | $330,485,821 | |||
| 41 | $295,094,124 | |||
| 42 |
KBR Wyle Services LLC
|
$286,112,785 | ||
| 43 | $284,654,705 | |||
| 44 | $271,258,502 | |||
| 45 | $266,085,713 | |||
| 46 | $261,679,197 | |||
| 47 | $257,243,543 | |||
| 48 |
Trace Systems, Inc.
Top agencies
|
$256,724,024 | ||
| 49 | $247,589,048 | |||
| 50 | $241,732,544 | |||
| 51 |
BWX Technologies, Inc.
Top agencies
|
$230,377,952 | ||
| 52 | $224,948,129 | |||
| 53 | $214,469,293 | |||
| 54 |
Clark Construction LLC
Top agencies
|
$212,884,061 | ||
| 55 | $204,919,011 | |||
| 56 | $204,593,796 | |||
| 57 | $203,576,506 | |||
| 58 | $202,607,471 | |||
| 59 | $199,271,761 | |||
| 60 |
Johns Hopkins University
|
$193,745,419 | ||
| 61 | $192,600,467 | |||
| 62 | $188,788,292 | |||
| 63 | $180,678,382 | |||
| 64 |
Digiflight Incorporated
Top agencies
|
$178,391,116 | ||
| 65 |
Bowman Consulting Group Ltd.
|
$176,979,644 | ||
| 66 |
Inter-CON Security Systems Inc.
|
$165,974,843 | ||
| 67 |
Sigmatech Inc.
|
$160,250,130 | ||
| 68 |
Oshkosh Corporation
|
$155,003,441 | ||
| 69 | $154,532,004 | |||
| 70 | $148,717,333 | |||
| 71 | $145,522,801 | |||
| 72 | $142,336,878 | |||
| 73 | $141,251,010 | |||
| 74 | $139,940,027 | |||
| 75 | $139,535,425 | |||
| 76 |
Mag DS Corp
Top agencies
|
$137,528,082 | ||
| 77 | $136,837,682 | |||
| 78 | $136,688,031 | |||
| 79 |
Path
Top agencies
|
$135,062,532 | ||
| 80 | $131,373,877 | |||
| 81 |
CQ JV, LLC
Top agencies
|
$128,995,362 | ||
| 82 | $127,745,397 | |||
| 83 |
Anduril Industries Inc.
|
$127,405,377 | ||
| 84 | $126,546,359 | |||
| 85 |
P E Systems, Inc.
Top agencies
|
$125,618,886 | ||
| 86 | $122,641,074 | |||
| 87 | $122,573,605 | |||
| 88 | $121,185,292 | |||
| 89 |
QED Systems LLC
Top agencies
|
$119,512,211 | ||
| 90 | $117,327,826 | |||
| 91 | $116,876,986 | |||
| 92 |
Asgn Incorporated
|
$115,653,075 | ||
| 93 |
ICF International Inc.
|
$113,609,596 | ||
| 94 | $113,288,887 | |||
| 95 | $111,557,956 | |||
| 96 |
BC Partners LLP
Top agencies
|
$111,294,088 | ||
| 97 | $111,064,668 | |||
| 98 | $110,046,250 | |||
| 99 |
Securitas Critical Infrastructure Services Inc.
|
$107,149,483 | ||
| 100 | $102,891,252 |
Show 75 more
100 of 8,776 contractors listed here. See the rest on GovTribe.
Rankings for the codes under PSC R4
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 $84.7 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.
- Period: the trailing 12 months end with the last month that ended at least 90 days ago, because the Department of Defense reports its contract actions to FPDS about 90 days late. The list is rebuilt each night.
- Rank changes compare with Aug 2024–Jul 2025. "New" marks a company outside that period's top 500, and "Returned" one of those that was on an earlier fiscal year's list.
- Rank lines show each company's rank on every fiscal year's list since FY2021, #1 at the top, on a scale that gives the top of the list more room. A dashed stretch spans years it wasn't on the list.
- Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.
Quick answers
Who were the top 10 PSC R4 contractors in Aug 2025–Jul 2026?
1. Booz Allen Hamilton Holding Corporation ($3.31B), 2. The Boeing Company ($3.02B), 3. CACI International Inc. ($1.86B), 4. General Dynamics Corporation ($1.86B), 5. Lockheed Martin Corporation ($1.64B), 6. Science Applications International Corporation ($1.62B), 7. Amentum Holdings, Inc. ($1.46B), 8. Deloitte ($1.44B), 9. Northrop Grumman Systems Corporation ($1.42B), 10. Leidos Holdings, Inc. ($1.3B).
On GovTribe
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