Top 100 Contractors in PSC 6635: Physical Properties Testing and Inspection, 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 6635: Physical Properties Testing and Inspection, FY2025.
The top 10 won 52% of PSC 6635 contract dollars from August 2025 through July 2026
Ranking facts
- Contract obligations
- $63,317,394 Net of deobligations, by contracts coded PSC 6635
- Contractors
- 237 Parent companies with an obligation
- Largest contractor
- Rapiscan Systems Inc. $7.62 million, 11.7% 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 |
Rapiscan Systems Inc.
|
$7,615,764 | ||
| 2 | $4,839,548 | |||
| 3 | $3,879,242 | |||
| 4 | $3,162,980 | |||
| 5 |
Atap Inc.
Top agencies
|
$2,635,872 | ||
| 6 | $2,628,559 | |||
| 7 |
Cook Inlet Region Inc.
Top agencies
|
$2,326,900 | ||
| 8 | $2,278,810 | |||
| 9 |
Hexagon Manufacturing Intelligence Inc.
Top agencies
|
$2,268,622 | ||
| 10 | $2,076,013 | |||
| 11 | $2,018,528 | |||
| 12 | $1,806,405 | |||
| 13 | $1,366,637 | |||
| 14 |
MTI Instruments Inc
Top agencies
|
$1,273,401 | ||
| 15 | $1,254,087 | |||
| 16 |
Carestream Health, Inc.
Top agencies
|
$1,126,747 | ||
| 17 |
Expotech U.s.a., Inc.
Top agencies
|
$914,466 | ||
| 18 |
Alpha Omega Group Logistics LLC
Top agencies
|
$898,473 | ||
| 19 | $772,235 | |||
| 20 | $695,357 | |||
| 21 |
V.j. Technologies, Inc.
Top agencies
|
$634,117 | ||
| 22 |
Bruker AXS LLC
|
$617,698 | ||
| 23 |
Thermo Fisher Scientific Inc.
|
$563,958 | ||
| 24 |
Gaffel Equipment
Top agencies
|
$521,600 | ||
| 25 |
Zwickroell, LP
Top agencies
|
$494,946 | ||
| 26 | $460,978 | |||
| 27 |
Martin Military Inc.
Top agencies
|
$427,625 | ||
| 28 | $408,211 | |||
| 29 | $365,425 | |||
| 30 |
Mystaire Inc
Top agencies
|
$363,616 | ||
| 31 |
Fairwinds Technologies LLC
Top agencies
|
$314,264 | ||
| 32 |
B & H International LLC
Top agencies
|
$296,530 | ||
| 33 | $290,848 | |||
| 34 | $289,367 | |||
| 35 |
Astrophysics Inc.
Top agencies
|
$288,581 | ||
| 36 |
Statz Corp
Top agencies
|
$272,407 | ||
| 37 |
E & S Industriebedarf GMBH
Top agencies
|
$257,325 | ||
| 38 | $256,575 | |||
| 39 |
Aerofab NDT LLC
Top agencies
|
$250,856 | ||
| 40 |
Leco Corp
Top agencies
|
$249,999 | ||
| 41 | $249,231 | |||
| 42 |
TSI Incorporated
Top agencies
|
$241,456 | ||
| 43 |
Cenmed Enterprises Inc.
Top agencies
|
$230,900 | ||
| 44 |
The Red List Group. Llc
Top agencies
|
$219,400 | ||
| 45 | $213,591 | |||
| 46 | $212,780 | |||
| 47 |
Horizon 66 B V
Top agencies
|
$207,707 | ||
| 48 |
PH Tool, LLC
Top agencies
|
$203,945 | ||
| 49 | $201,930 | |||
| 50 | $190,189 | |||
| 51 |
Hyspex Inc.
Top agencies
|
$186,365 | ||
| 52 | $183,133 | |||
| 53 |
K5 Defense LLC
Top agencies
|
$182,832 | ||
| 54 | $181,315 | |||
| 55 | $168,686 | |||
| 56 |
Tinius Olsen Testing Machine Co Inc
|
$168,414 | ||
| 57 | $167,160 | |||
| 58 | $162,027 | |||
| 59 |
Plastometrex Usa, Inc.
Top agencies
|
$160,187 | ||
| 60 | $155,748 | |||
| 61 | $155,728 | |||
| 62 | $146,416 | |||
| 63 | $146,353 | |||
| 64 |
Foster & Freeman USA Inc.
Top agencies
|
$139,004 | ||
| 65 | $134,253 | |||
| 66 |
Vcloud GOV Inc.
Top agencies
|
$132,621 | ||
| 67 |
Cap 360 LLC
Top agencies
|
$123,123 | ||
| 68 | $123,090 | |||
| 69 | $123,040 | |||
| 70 |
Tevet LLC
Top agencies
|
$121,550 | ||
| 71 |
Productivity Quality Inc.
Top agencies
|
$120,821 | ||
| 72 | $118,584 | |||
| 73 |
S I T Corporation
Top agencies
|
$114,531 | ||
| 74 | $109,938 | |||
| 75 |
Roper Technologies Inc.
Top agencies
|
$108,940 | ||
| 76 | $105,390 | |||
| 77 |
Psylotech, Inc.
Top agencies
|
$104,079 | ||
| 78 |
A.k.o. Inc.
Top agencies
|
$103,570 | ||
| 79 | $102,574 | |||
| 80 | $101,186 | |||
| 81 |
Phoenix Trading Inc.
Top agencies
|
$101,160 | ||
| 82 |
Raysecur Inc.
Top agencies
|
$101,105 | ||
| 83 |
Kerley Corporation
Top agencies
|
$101,050 | ||
| 84 |
U S Analytical Solutions LLC
Top agencies
|
$99,119 | ||
| 85 | $98,854 | |||
| 86 |
Ametek Inc.
Top agencies
|
$98,449 | ||
| 87 |
Rev-Cap Company, Inc.
Top agencies
|
$96,780 | ||
| 88 |
Dolphitech Inc.
Top agencies
|
$92,765 | ||
| 89 |
Jag Components, LLC
Top agencies
|
$89,070 | ||
| 90 |
Utech Products Inc.
Top agencies
|
$88,405 | ||
| 91 | $84,122 | |||
| 92 | $83,140 | |||
| 93 |
Scitech Services Inc.
Top agencies
|
$79,510 | ||
| 94 |
Amphenol Corporation
Top agencies
|
$79,029 | ||
| 95 | $78,775 | |||
| 96 | $78,200 | |||
| 97 |
The Boeing Company
Top agencies
|
$76,527 | ||
| 98 |
AIT Products LLC
Top agencies
|
$75,808 | ||
| 99 | $68,693 | |||
| 100 |
Gamry Instruments, Inc.
Top agencies
|
$66,748 |
Show 75 more
100 of 237 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 $65.1 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 6635 contractors in Aug 2025–Jul 2026?
1. Rapiscan Systems Inc. ($7.62M), 2. D-2 Incorporated ($4.84M), 3. Leidos Holdings, Inc. ($3.88M), 4. Viken Detection Corporation ($3.16M), 5. Atap Inc. ($2.64M), 6. Agilent Technologies, Inc. ($2.63M), 7. Cook Inlet Region Inc. ($2.33M), 8. Jess W. Jackson and Associates, Inc. ($2.28M), 9. Hexagon Manufacturing Intelligence Inc. ($2.27M), 10. Illinois Tool Works Inc. ($2.08M).
On GovTribe
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