Top 36 Contractors in PSC H359: Inspection and Laboratory Services (except medical/dental): Electrical and Electronic Equipment Components, FY2025
Parent companies by net contract obligations Oct 1, 2024 – Sep 30, 2025 Code page on GovTribe
The top 10 won 55% of FY2025 PSC H359 contract dollars
Ranking facts
- Contract obligations
- $1,223,019 Net of deobligations, by contracts coded PSC H359
- Contractors
- 40 Parent companies with an obligation
- Largest contractor
- William Henderson LLC $159 thousand, 9.6% of obligations
- Data as of
Contract actions from FPDS (SAM.gov). How the rankings work · Download all 36 rows as CSV
Full ranking
| Rank | Contractor | Net obligations | Share | Trend |
|---|---|---|---|---|
| 1 |
William Henderson LLC
Top agencies
|
$158,794 | ||
| 2 | $157,130 | |||
| 3 | $99,024 | |||
| 4 | $98,923 | |||
| 5 | $77,753 | |||
| 6 | $71,107 | |||
| 7 | $69,400 | |||
| 8 |
Software Information Resource Corp
Top agencies
|
$64,702 | ||
| 9 | $55,179 | |||
| 10 |
Eaton Corporation
Top agencies
|
$54,394 | ||
| 11 | $46,589 | |||
| 12 |
Alpha Development Inc.
Top agencies
|
$42,436 | ||
| 13 |
EMC Corporation
Top agencies
|
$40,276 | ||
| 14 |
Dell Technologies Inc.
Top agencies
|
$40,056 | ||
| 15 | $33,290 | |||
| 16 |
Tekton CC, LLC
Top agencies
|
$30,324 | ||
| 17 | $29,980 | |||
| 18 |
Naeunengineering Co.ltd
Top agencies
|
$29,244 | ||
| 19 | $24,000 | |||
| 20 | $22,008 | |||
| 21 |
Asco Power Services Inc
Top agencies
|
$19,134 | ||
| 22 | $19,000 | |||
| 23 |
Gamma Scientific Inc.
Top agencies
|
$16,780 | ||
| 24 | $14,054 | |||
| 25 | $13,719 | |||
| 26 |
Mechantech Inc
Top agencies
|
$11,613 | ||
| 27 |
Lotususa, Inc.
Top agencies
|
$10,713 | ||
| 28 | $8,800 | |||
| 29 | $8,412 | |||
| 30 |
Admiral Elevator Company Inc.
Top agencies
|
$8,240 | ||
| 31 | $7,815 | |||
| 32 |
Inntech Inc.
Top agencies
|
$6,590 | ||
| 33 | $4,945 | |||
| 34 | $3,300 | |||
| 35 | $2,880 | |||
| 36 |
Twining Inc.
Top agencies
|
$674 |
Show 11 more
36 of 40 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 $1.65 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. 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 H359 contractors in FY2025?
1. William Henderson LLC ($159K), 2. Electrical Instrumentation and Controls, Inc. ($157K), 3. Waste Connections of Alaska, Inc. ($99K), 4. Pacific Coast Contracting Group ($98.9K), 5. Electrical Engineering Enterprises, Inc. ($77.8K), 6. Converse Construction, Inc. ($71.1K), 7. Multivariable Systems Tech, LLC ($69.4K), 8. Software Information Resource Corp ($64.7K), 9. Nihon Highway Service Co.,Ltd. ($55.2K), 10. Eaton Corporation ($54.4K).
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