Top 60 Contractors in PSC AC31: National Defense R&D Services; Defense-Related Activities; Basic Research, 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 AC31: National Defense R&D Services; Defense-Related Activities; Basic Research, FY2025.
The top 10 won 89% of PSC AC31 contract dollars from August 2025 through July 2026
Ranking facts
- Contract obligations
- $1,310,151,721 Net of deobligations, by contracts coded PSC AC31
- Contractors
- 64 Parent companies with an obligation
- Largest contractor
- Massachusetts Institute of Technology $905 million, 68.0% of obligations
- Data as of
Contract actions from FPDS (SAM.gov). How the rankings work · Download all 60 rows as CSV · Free to reuse with credit to GovTribe (CC BY 4.0)
Full ranking
| Rank | Contractor | Net obligations | Share | Trend |
|---|---|---|---|---|
| 1 | $904,750,636 | |||
| 2 | $74,050,349 | |||
| 3 |
Analytic Services Inc.
Top agencies
|
$47,407,670 | ||
| 4 |
Envisioneering Inc.
Top agencies
|
$31,001,116 | ||
| 5 | $28,537,925 | |||
| 6 |
Cubrc, Inc.
Top agencies
|
$27,894,366 | ||
| 7 | $22,903,522 | |||
| 8 |
RTX Corporation
Top agencies
|
$20,480,565 | ||
| 9 | $15,636,435 | |||
| 10 | $15,102,842 | |||
| 11 | $12,518,885 | |||
| 12 |
World Wide Technology LLC
Top agencies
|
$11,299,302 | ||
| 13 |
The Chenega Corporation
Top agencies
|
$9,921,549 | ||
| 14 |
Ionq, Inc.
Top agencies
|
$9,682,601 | ||
| 15 | $9,496,094 | |||
| 16 |
Einhorn Engineering PLLC
Top agencies
|
$8,232,134 | ||
| 17 |
Firefly Aerospace Inc.
Top agencies
|
$6,769,944 | ||
| 18 | $5,238,797 | |||
| 19 |
Technology Service Corp
Top agencies
|
$4,810,324 | ||
| 20 |
Matrix Research Inc
|
$4,231,497 | ||
| 21 |
Antares Nuclear, Inc.
Top agencies
|
$4,199,862 | ||
| 22 | $4,192,997 | |||
| 23 |
Sedaro Corporation
Top agencies
|
$3,609,409 | ||
| 24 | $3,465,967 | |||
| 25 |
Amentum Holdings, Inc.
Top agencies
|
$2,276,971 | ||
| 26 | $2,260,939 | |||
| 27 |
Astrion Group, LLC
Top agencies
|
$2,049,915 | ||
| 28 |
Qinetiq Inc.
Top agencies
|
$1,803,937 | ||
| 29 |
Calnetix Technologies LLC
Top agencies
|
$1,492,775 | ||
| 30 |
Hornet Acquisitionco LLC
Top agencies
|
$1,488,238 | ||
| 31 | $1,424,301 | |||
| 32 | $1,314,313 | |||
| 33 | $1,234,511 | |||
| 34 |
Colvin Run Networks, Inc.
Top agencies
|
$1,069,530 | ||
| 35 | $1,031,801 | |||
| 36 |
Hamr Industries LLC
Top agencies
|
$1,023,308 | ||
| 37 |
Igneon Aerospace LLC
Top agencies
|
$1,000,000 | ||
| 38 | $980,000 | |||
| 39 |
Simventions Inc.
Top agencies
|
$975,000 | ||
| 40 |
Physical Sciences Inc.
Top agencies
|
$799,993 | ||
| 41 |
Nag, LLC
Top agencies
|
$775,410 | ||
| 42 |
Orbis Sibro Inc.
Top agencies
|
$734,332 | ||
| 43 | $718,731 | |||
| 44 |
University of Texas System
Top agencies
|
$623,361 | ||
| 45 | $602,855 | |||
| 46 | $379,320 | |||
| 47 | $358,899 | |||
| 48 | $301,495 | |||
| 49 |
BIO Response Solutions Inc
Top agencies
|
$259,929 | ||
| 50 |
Esco Technologies Inc.
Top agencies
|
$196,616 | ||
| 51 |
Aleta Technologies Inc
Top agencies
|
$139,985 | ||
| 52 |
Defense Unicorns, Inc.
Top agencies
|
$139,958 | ||
| 53 |
Lineaje Inc.
Top agencies
|
$139,931 | ||
| 54 | $124,291 | |||
| 55 |
Hebi Robotics, Inc.
Top agencies
|
$91,740 | ||
| 56 | $89,123 | |||
| 57 |
Serco Inc
Top agencies
|
$55,919 | ||
| 58 |
Indal Technologies Inc
Top agencies
|
$49,942 | ||
| 59 |
Jensen Hughes, Inc.
Top agencies
|
$18,200 | ||
| 60 |
Advanced Acoustic Concepts, LLC
Top agencies
|
$10,000 |
Show 35 more
60 of 64 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 $1.33 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 AC31 contractors in Aug 2025–Jul 2026?
1. Massachusetts Institute of Technology ($905M), 2. Carnegie Mellon University ($74.1M), 3. Analytic Services Inc. ($47.4M), 4. Envisioneering Inc. ($31M), 5. Mclaughlin Research Corporation ($28.5M), 6. Cubrc, Inc. ($27.9M), 7. Lockheed Martin Corporation ($22.9M), 8. RTX Corporation ($20.5M), 9. Accelint Decision Systems, Inc. ($15.6M), 10. American Systems Corporation ($15.1M).
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