Top 42 Contractors in PSC H166: Quality Control Services: Instruments and Laboratory Equipment, Jul 2025–Jun 2026

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Health Systems Sciences, LLC Top agencies VA (Department of Veterans Affairs)	$456,379	12.8%	Rank history: not on the FY2021 list, #7 in FY2022, #6 in FY2023, #6 in FY2024 and #2 in FY2025; up 5 since Jul 2024–Jun 2025.
2	Quest Diagnostics Incorporated Top agencies VA (Department of Veterans Affairs)	$431,101	12.1%	Rank history: not on the FY2021 list, #1 in FY2022, #1 in FY2023, #2 in FY2024 and #1 in FY2025; unchanged since Jul 2024–Jun 2025.
3	Lancaster Foundry Supply Company Inc. Top agencies Navy (Department of the Navy)	$389,056	10.9%	Rank history: not on the FY2021 list, #11 in FY2022, #9 in FY2023, #7 in FY2024 and #4 in FY2025; up 6 since Jul 2024–Jun 2025.
4	Cubrc, Inc. Top agencies HHS (Department of Health and Human Services)	$241,735	6.8%	Rank history: not on the FY2021–FY2023 lists, #1 in FY2024 and not on the FY2025 list; down 3 since Jul 2024–Jun 2025.
5	Tech62 Inc. Top agencies VA (Department of Veterans Affairs)	$227,546	6.4%	Rank history: #28 in FY2021, #28 in FY2022, not on the FY2023 list, #4 in FY2024 and #3 in FY2025; down 1 since Jul 2024–Jun 2025.
6	Advanced Monitoring Methods LLC Top agencies HHS (Department of Health and Human Services)	$222,622	6.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
7	Spectro Analytical Instruments, Inc. Top agencies DOI (Department of the Interior) EPA (Environmental Protection Agency)	$115,373	3.2%	Rank history: not on the FY2021–FY2023 lists, #8 in FY2024 and #6 in FY2025; unchanged since Jul 2024–Jun 2025.
8	A-Bear Consult LLC Top agencies VA (Department of Veterans Affairs)	$92,371	2.6%	Rank history: #25 in FY2021, #16 in FY2022, not on the FY2023 list, #9 in FY2024 and #7 in FY2025; up 2 since Jul 2024–Jun 2025.
9	HGS Engineering Inc. Top agencies VA (Department of Veterans Affairs)	$87,077	2.4%	Rank history: #13 in FY2021, #15 in FY2022, #14 in FY2023, #17 in FY2024 and #8 in FY2025; up 2 since Jul 2024–Jun 2025.
10	Onset Computer Corporation Top agencies Army (Department of the Army)	$86,943	2.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
11	Sysmex America Inc. Top agencies HHS (Department of Health and Human Services)	$77,355	2.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
12	Safety Plus LLC Top agencies VA (Department of Veterans Affairs)	$69,580	2.0%	Rank history: not on the FY2021–FY2023 lists, #16 in FY2024 and #15 in FY2025; up 5 since Jul 2024–Jun 2025.
13	Rees Scientific Corporation Top agencies Navy (Department of the Navy)	$67,327	1.9%	Rank history: #14 in FY2021, #29 in FY2022, #40 in FY2023, not on the FY2024 list and #10 in FY2025; new, not ranked in Jul 2024–Jun 2025.
14	Shimadzu Science Corporation Top agencies Navy (Department of the Navy)	$66,605	1.9%	Rank history: not on the FY2021–FY2023 lists, #50 in FY2024 and #21 in FY2025; up 10 since Jul 2024–Jun 2025.
15	Danaher Corporation Through Cepheid Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$64,323	1.8%	Rank history: not on the FY2021–FY2022 lists, #20 in FY2023, #23 in FY2024 and #12 in FY2025; down 2 since Jul 2024–Jun 2025.
16	US Micro-Solutions Inc. Top agencies VA (Department of Veterans Affairs)	$52,845	1.5%	Rank history: not on the FY2021–FY2023 lists, #14 in FY2024 and #11 in FY2025; down 1 since Jul 2024–Jun 2025.
17	Payne Health Physics Corp Top agencies VA (Department of Veterans Affairs)	$51,965	1.5%	Rank history: not on the FY2021–FY2024 lists and #14 in FY2025; new, not ranked in Jul 2024–Jun 2025.
18	Winergy LLC Top agencies VA (Department of Veterans Affairs)	$41,821	1.2%	Rank history: #3 in FY2021, #10 in FY2022, #17 in FY2023, #18 in FY2024 and #17 in FY2025; unchanged since Jul 2024–Jun 2025.
19	PPD Development LP Through Thermo Electron North America LLC Top agencies DOI (Department of the Interior)	$39,582	1.1%	Rank history: not on the FY2021–FY2023 lists, #5 in FY2024 and #9 in FY2025; down 14 since Jul 2024–Jun 2025.
20	Ionflight LLC Top agencies DOI (Department of the Interior)	$39,000	1.1%	Rank history: not on the FY2021 list, #26 in FY2022, #29 in FY2023, #30 in FY2024 and not on the FY2025 list; up 8 since Jul 2024–Jun 2025.
21	Arcadis U.s., Inc. Top agencies CPSC (Consumer Product Safety Commission)	$36,991	1.0%	Rank history: not on the FY2021–FY2023 lists, #19 in FY2024 and #18 in FY2025; unchanged since Jul 2024–Jun 2025.
22	Nexus Group, LLC Top agencies DOI (Department of the Interior)	$28,800	0.8%	Rank history: not on the FY2021–FY2022 lists, #22 in FY2023, #22 in FY2024 and #22 in FY2025; up 3 since Jul 2024–Jun 2025.
23	Shibamoto & Co.,Ltd. Top agencies Navy (Department of the Navy)	$22,600	0.6%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
24	American Proficiency Institute Inc. Top agencies HHS (Department of Health and Human Services)	$22,428	0.6%	Rank history: not on the FY2021–FY2022 lists, #28 in FY2023, #29 in FY2024 and #20 in FY2025; down 1 since Jul 2024–Jun 2025.
25	Ansi National Accreditation Board LLC Top agencies Army (Department of the Army)	$18,000	0.5%	Rank history: #18 in FY2021, #37 in FY2022, #10 in FY2023, #35 in FY2024 and #16 in FY2025; down 5 since Jul 2024–Jun 2025.
26	Getinge USA Sales, LLC Top agencies Army (Department of the Army)	$15,081	0.4%	Rank history: not on the FY2021–FY2024 lists and #32 in FY2025; up 9 since Jul 2024–Jun 2025.
27	Assured Bio Labs, LLC Top agencies VA (Department of Veterans Affairs)	$14,989	0.4%	Rank history: not on the FY2021–FY2022 lists, #26 in FY2023, #32 in FY2024 and #24 in FY2025; up 4 since Jul 2024–Jun 2025.
28	Cornerstone Commissioning, LLC Top agencies VA (Department of Veterans Affairs)	$13,325	0.4%	Rank history: not on the FY2021–FY2023 lists, #39 in FY2024 and #33 in FY2025; up 8 since Jul 2024–Jun 2025.
29	Fortive Corporation Through Fluke Electronics Corp Top agencies Commerce (Department of Commerce)	$11,708	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
30	College of American Pathologists Top agencies VA (Department of Veterans Affairs)	$11,392	0.3%	Rank history: not on the FY2021–FY2024 lists and #13 in FY2025; down 16 since Jul 2024–Jun 2025.
31	Brinkmann Instruments Inc. Top agencies DOI (Department of the Interior)	$11,318	0.3%	Rank history: not on the FY2021–FY2024 lists and #34 in FY2025; up 7 since Jul 2024–Jun 2025.
32	Ronnie Tomsick JR Top agencies VA (Department of Veterans Affairs)	$11,270	0.3%	Rank history: not on the FY2021–FY2024 lists and #35 in FY2025; up 7 since Jul 2024–Jun 2025.
33	Instrumentation Services Inc Top agencies VA (Department of Veterans Affairs)	$9,750	0.3%	Rank history: not on the FY2021–FY2023 lists, #44 in FY2024 and #37 in FY2025; up 8 since Jul 2024–Jun 2025.
34	Nsca, LLC Top agencies Commerce (Department of Commerce)	$8,509	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
35	Process Sensing Technologies Corp. Top agencies Commerce (Department of Commerce)	$8,107	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
36	Jasco Support Co Ltd Top agencies Navy (Department of the Navy)	$7,066	0.2%	Rank history: not on the FY2021–FY2024 lists and #39 in FY2025; up 7 since Jul 2024–Jun 2025.
37	Industrial Welding Supply Inc. Top agencies Commerce (Department of Commerce)	$7,000	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
38	Whesco Group Inc. Top agencies Commerce (Department of Commerce)	$6,450	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
39	Collaborative Testing Services, Inc. Top agencies Navy (Department of the Navy)	$5,660	0.2%	Rank history: not on the FY2021–FY2023 lists, #48 in FY2024 and #40 in FY2025; up 6 since Jul 2024–Jun 2025.
40	Technical Safety Services, LLC Top agencies VA (Department of Veterans Affairs)	$4,160	0.1%	Rank history: #15 in FY2021, #9 in FY2022, not on the FY2023 list, #40 in FY2024 and not on the FY2025 list; new, not ranked in Jul 2024–Jun 2025.
41	Scientific Calibration, Inc. Top agencies Navy (Department of the Navy)	$3,551	0.1%	Rank history: #35 in FY2021, #36 in FY2022, #46 in FY2023, #47 in FY2024 and #42 in FY2025; up 3 since Jul 2024–Jun 2025.
42	Allometrics Inc. Top agencies VA (Department of Veterans Affairs)	$1,817	0.1%	Rank history: not on the FY2021–FY2024 lists and #19 in FY2025; down 20 since Jul 2024–Jun 2025.

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 $3.56 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.
• 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 Jul 2024–Jun 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.

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