Top 100 Contractors in PSC 6550: In Vitro Diagnostic Substances, Reagents, Test Kits and Sets, 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 6550: In Vitro Diagnostic Substances, Reagents, Test Kits and Sets, FY2025.
The top 10 won 56% of PSC 6550 contract dollars from August 2025 through July 2026
Ranking facts
- Contract obligations
- $201,280,572 Net of deobligations, by contracts coded PSC 6550
- Contractors
- 184 Parent companies with an obligation
- Largest contractor
- Danaher Corporation $45.3 million, 18.1% 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 |
Danaher Corporation
|
$45,258,183 | ||
| 2 | $25,139,509 | |||
| 3 |
Roche Holdings Inc.
|
$22,762,650 | ||
| 4 | $11,079,678 | |||
| 5 |
Sysmex America Inc.
|
$7,990,243 | ||
| 6 | $7,218,404 | |||
| 7 |
Ortho-Clinical Diagnostics Inc.
|
$6,824,061 | ||
| 8 | $5,225,670 | |||
| 9 | $4,890,080 | |||
| 10 |
Biofire Defense LLC
|
$4,749,474 | ||
| 11 |
Siemens Corporation
|
$4,216,437 | ||
| 12 | $4,010,929 | |||
| 13 | $4,004,438 | |||
| 14 | $3,728,920 | |||
| 15 |
Vmrd Inc.
Top agencies
|
$3,330,499 | ||
| 16 | $3,005,901 | |||
| 17 |
Greer Laboratories, Inc.
Top agencies
|
$2,291,752 | ||
| 18 | $2,253,766 | |||
| 19 | $2,092,907 | |||
| 20 |
Mariano Prime LLC
Top agencies
|
$1,952,614 | ||
| 21 | $1,636,070 | |||
| 22 |
Novartis Pharmaceuticals Corporation
Top agencies
|
$1,483,015 | ||
| 23 | $1,349,205 | |||
| 24 | $1,308,045 | |||
| 25 | $1,293,644 | |||
| 26 | $1,246,969 | |||
| 27 | $1,200,542 | |||
| 28 |
Oneblood, Inc.
Top agencies
|
$1,052,683 | ||
| 29 |
Smiths Detection Inc.
Top agencies
|
$1,008,866 | ||
| 30 | $915,302 | |||
| 31 |
Charm Sciences Inc.
Top agencies
|
$823,142 | ||
| 32 | $721,744 | |||
| 33 | $703,298 | |||
| 34 | $607,034 | |||
| 35 | $595,000 | |||
| 36 |
Murtech, Inc.
Top agencies
|
$584,819 | ||
| 37 |
Summit Shoji Inc.
Top agencies
|
$566,909 | ||
| 38 | $538,136 | |||
| 39 | $535,558 | |||
| 40 |
The Blood Center
Top agencies
|
$524,777 | ||
| 41 |
Grifols Diagnostic Solutions Inc.
|
$523,741 | ||
| 42 | $518,063 | |||
| 43 |
Medpharm Inc.
Top agencies
|
$466,549 | ||
| 44 |
Immucor Inc.
Top agencies
|
$403,654 | ||
| 45 | $402,766 | |||
| 46 | $395,823 | |||
| 47 | $392,088 | |||
| 48 | $390,845 | |||
| 49 |
Clear Labs Inc.
Top agencies
|
$373,401 | ||
| 50 | $349,693 | |||
| 51 | $347,507 | |||
| 52 |
SZY Holdings, LLC
Top agencies
|
$326,807 | ||
| 53 | $292,973 | |||
| 54 |
Fresenius Medical Care Holdings Inc.
Top agencies
|
$286,074 | ||
| 55 | $283,481 | |||
| 56 |
RLS (USA) Inc.
Top agencies
|
$250,075 | ||
| 57 | $248,906 | |||
| 58 |
Cerus Corporation
Top agencies
|
$246,510 | ||
| 59 |
Cambridge Isotope Laboratories Inc.
Top agencies
|
$221,095 | ||
| 60 | $216,015 | |||
| 61 | $210,558 | |||
| 62 | $200,895 | |||
| 63 | $188,660 | |||
| 64 | $184,738 | |||
| 65 | $172,740 | |||
| 66 | $155,227 | |||
| 67 |
Maxim Biomedical, Inc.
Top agencies
|
$155,000 | ||
| 68 | $151,845 | |||
| 69 | $148,968 | |||
| 70 | $146,995 | |||
| 71 | $146,500 | |||
| 72 | $142,777 | |||
| 73 |
SL Meditech Co.
Top agencies
|
$135,240 | ||
| 74 | $129,000 | |||
| 75 | $128,917 | |||
| 76 |
Abcam Inc.
Top agencies
|
$124,750 | ||
| 77 |
Sysmex Deutschland GMBH
Top agencies
|
$120,115 | ||
| 78 | $118,170 | |||
| 79 |
STG Korea Inc.
Top agencies
|
$116,573 | ||
| 80 |
Quanterix Corporation
Top agencies
|
$112,137 | ||
| 81 | $111,196 | |||
| 82 |
Biocartis US Inc
Top agencies
|
$108,922 | ||
| 83 |
Streck LLC
Top agencies
|
$106,888 | ||
| 84 |
Indical Inc.
Top agencies
|
$103,360 | ||
| 85 | $102,402 | |||
| 86 |
Nikon Metrology Inc
Top agencies
|
$100,580 | ||
| 87 | $96,268 | |||
| 88 |
Nichiei-Tokai Co., Ltd.
Top agencies
|
$91,425 | ||
| 89 |
Mapp Biopharmaceutical, Inc.
Top agencies
|
$91,250 | ||
| 90 |
Cenmed Enterprises Inc.
Top agencies
|
$90,789 | ||
| 91 | $85,865 | |||
| 92 |
Stripes Global, Inc.
Top agencies
|
$84,079 | ||
| 93 |
Hemosonics, LLC
Top agencies
|
$82,300 | ||
| 94 |
Meridian Bioscience Inc.
|
$81,803 | ||
| 95 |
Laboratory Corporation of America
Top agencies
|
$73,400 | ||
| 96 | $66,890 | |||
| 97 |
Siemens Aktiengesellschaft
Top agencies
|
$65,599 | ||
| 98 |
Palmetto Isotopes, LLC
Top agencies
|
$65,283 | ||
| 99 | $65,112 | |||
| 100 |
Arkray Marketing, Inc.
Top agencies
|
$64,400 |
Show 75 more
100 of 184 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 $250 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 6550 contractors in Aug 2025–Jul 2026?
1. Danaher Corporation ($45.3M), 2. Biomerieux Inc. ($25.1M), 3. Roche Holdings Inc. ($22.8M), 4. Abbott Laboratories Inc. ($11.1M), 5. Sysmex America Inc. ($7.99M), 6. Thermo Fisher Scientific Inc. ($7.22M), 7. Ortho-Clinical Diagnostics Inc. ($6.82M), 8. Illumina, Inc. ($5.23M), 9. Hologic, Inc. ($4.89M), 10. Biofire Defense LLC ($4.75M).
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