Top 49 Contractors in PSC AD: Defense (Other) R&D, 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 AD: Defense (Other) R&D, FY2025.
The top 10 won 84% of PSC AD contract dollars from August 2025 through July 2026
Ranking facts
- Contract obligations
- $773,777,391 Net of deobligations, by contracts coded PSC AD or a code under it
- Contractors
- 56 Parent companies with an obligation
- Largest contractor
- Accelint Intelligent Systems, LLC $289 million, 34.0% of obligations
- Data as of
Contract actions from FPDS (SAM.gov). How the rankings work · Download all 49 rows as CSV · Free to reuse with credit to GovTribe (CC BY 4.0)
Full ranking
| Rank | Contractor | Net obligations | Share | Trend |
|---|---|---|---|---|
| 1 | $289,057,284 | |||
| 2 | $111,960,787 | |||
| 3 | $80,769,000 | |||
| 4 | $67,782,814 | |||
| 5 | $44,694,472 | |||
| 6 | $35,953,638 | |||
| 7 | $33,416,831 | |||
| 8 | $18,518,676 | |||
| 9 | $15,869,471 | |||
| 10 | $15,134,519 | |||
| 11 | $14,083,132 | |||
| 12 | $12,762,127 | |||
| 13 | $8,071,434 | |||
| 14 | $5,930,412 | |||
| 15 | $4,531,149 | |||
| 16 | $4,260,601 | |||
| 17 |
RTX Corporation
|
$2,966,110 | ||
| 18 |
Nanoracks, LLC
Top agencies
|
$2,963,153 | ||
| 19 | $2,601,183 | |||
| 20 | $2,502,676 | |||
| 21 |
Asgn Incorporated
Top agencies
|
$2,287,475 | ||
| 22 |
Expedition Technology, LLC
Top agencies
|
$2,186,808 | ||
| 23 | $2,069,143 | |||
| 24 | $2,037,540 | |||
| 25 |
Nalas Engineering Services Inc
Top agencies
|
$1,623,698 | ||
| 26 | $1,511,343 | |||
| 27 |
Quantum Semiconductor LLC
Top agencies
|
$1,484,822 | ||
| 28 | $1,431,316 | |||
| 29 | $1,125,125 | |||
| 30 |
Spaceworks Enterprises Inc.
Top agencies
|
$1,115,117 | ||
| 31 | $1,105,640 | |||
| 32 | $932,047 | |||
| 33 | $588,465 | |||
| 34 |
The Johns Hopkins University Applied Physics Laboratory LLC
|
$545,609 | ||
| 35 |
Noresco, LLC
Top agencies
|
$499,966 | ||
| 36 | $374,005 | |||
| 37 |
Amentum Holdings, Inc.
Top agencies
|
$268,130 | ||
| 38 |
Serco-Ips Corporation
Top agencies
|
$180,590 | ||
| 39 | $155,856 | |||
| 40 |
Fortem Technologies Inc.
Top agencies
|
$127,630 | ||
| 41 | $112,244 | |||
| 42 |
Mayo Clinic
Top agencies
|
$81,855 | ||
| 43 | $76,359 | |||
| 44 |
Energysolutions Services, Inc.
Top agencies
|
$65,298 | ||
| 45 |
Silverblock Systems Inc.
Top agencies
|
$52,122 | ||
| 46 |
Fibertek, Inc.
Top agencies
|
$41,662 | ||
| 47 |
Venesco LLC
Top agencies
|
$34,244 | ||
| 48 | $2,492 | |||
| 49 |
Technologist Inc.
Top agencies
|
$829 |
Show 24 more
49 of 56 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 $850 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. 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 AD contractors in Aug 2025–Jul 2026?
1. Accelint Intelligent Systems, LLC ($289M), 2. Lockheed Martin Corporation ($112M), 3. Seqirus Inc. ($80.8M), 4. Leidos Holdings, Inc. ($67.8M), 5. The Aerospace Corporation ($44.7M), 6. The National Advanced Mobility Consortium, Inc. ($36M), 7. Two Six Labs, LLC ($33.4M), 8. Applied Research Associates, Inc. ($18.5M), 9. University of Dayton ($15.9M), 10. Assured Information Security, Inc. ($15.1M).
On GovTribe
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