Top 66 Contractors in PSC B504: Chemical/Biological Studies and Analysis, Aug 2025–Jul 2026

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Merrick & Company Top agencies USDA (Department of Agriculture) DHS (Department of Homeland Security)	$38,243,844	55.9%	Rank history: not on the FY2021–FY2023 lists, #6 in FY2024 and #1 in FY2025; up 4 since Aug 2024–Jul 2025.
2	ICF International Inc. Through ICF Incorporated, L.L.C. Top agencies EPA (Environmental Protection Agency) CPSC (Consumer Product Safety Commission)	$6,441,903	9.4%	Rank history: not on the FY2021–FY2023 lists, #2 in FY2024 and #3 in FY2025; unchanged since Aug 2024–Jul 2025.
3	Techlaw Consultants Inc. Top agencies EPA (Environmental Protection Agency)	$3,422,929	5.0%	Rank history: #32 in FY2021, #14 in FY2022, not on the FY2023 list, #5 in FY2024 and #4 in FY2025; up 1 since Aug 2024–Jul 2025.
4	Signature Science, LLC Top agencies DHS (Department of Homeland Security)	$3,219,077	4.7%	Rank history: not on the FY2021–FY2023 lists, #7 in FY2024 and #5 in FY2025; up 3 since Aug 2024–Jul 2025.
5	Serco Inc Top agencies EPA (Environmental Protection Agency)	$2,467,974	3.6%	Rank history: not on the FY2021–FY2022 lists, #9 in FY2023, #8 in FY2024 and #7 in FY2025; up 3 since Aug 2024–Jul 2025.
6	MRIGLOBAL Top agencies DOD (Department of Defense)	$2,207,198	3.2%	Rank history: not on the FY2021–FY2022 lists, #4 in FY2023, #3 in FY2024 and #2 in FY2025; down 3 since Aug 2024–Jul 2025.
7	Environmental Assessment Services, LLC Top agencies Army (Department of the Army)	$1,369,295	2.0%	Rank history: not on the FY2021–FY2023 lists, #21 in FY2024 and #10 in FY2025; up 8 since Aug 2024–Jul 2025.
8	Bryce Space and Technology, LLC Top agencies Army (Department of the Army)	$840,620	1.2%	Rank history: not on the FY2021 list, #17 in FY2022, #10 in FY2023, #11 in FY2024 and #6 in FY2025; down 2 since Aug 2024–Jul 2025.
9	Qualis, LLC Top agencies Army (Department of the Army)	$784,313	1.1%	Rank history: #86 in FY2021, #6 in FY2022, #6 in FY2023, #4 in FY2024 and #8 in FY2025; up 1 since Aug 2024–Jul 2025.
10	Aptargroup Inc. Top agencies HHS (Department of Health and Human Services)	$650,036	1.0%	Rank history: not on the FY2021–FY2023 lists, #17 in FY2024 and #9 in FY2025; up 1 since Aug 2024–Jul 2025.
11	Eurofins Lancaster Laboratories Environment Testing, LLC Top agencies Army (Department of the Army)	$558,881	0.8%	Rank history: not on the FY2021–FY2023 lists, #24 in FY2024 and #14 in FY2025; up 3 since Aug 2024–Jul 2025.
12	Regents of the University of Michigan Top agencies HHS (Department of Health and Human Services)	$531,568	0.8%	Rank history: not on the FY2021–FY2022 lists, #13 in FY2023, #23 in FY2024 and #11 in FY2025; up 4 since Aug 2024–Jul 2025.
13	Lakota-Sundance JV, LLC Top agencies DOI (Department of the Interior)	$471,787	0.7%	Rank history: not on the FY2021–FY2024 lists and #12 in FY2025; new, not ranked in Aug 2024–Jul 2025.
14	University of Connecticut Top agencies HHS (Department of Health and Human Services)	$446,375	0.7%	Rank history: not on the FY2021–FY2023 lists, #25 in FY2024 and not on the FY2025 list; new, not ranked in Aug 2024–Jul 2025.
15	Anamar Environmental Consulting, Inc. Top agencies Army (Department of the Army)	$428,185	0.6%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
16	SGS Axys Analytical Services Ltd. Top agencies DOI (Department of the Interior)	$408,445	0.6%	Rank history: not on the FY2021–FY2024 lists and #24 in FY2025; up 14 since Aug 2024–Jul 2025.
17	Jeol Usa, Inc. Top agencies EPA (Environmental Protection Agency) HHS (Department of Health and Human Services)	$354,091	0.5%	Rank history: not on the FY2021–FY2024 lists and #17 in FY2025; up 49 since Aug 2024–Jul 2025.
18	University of California, LOS Angeles Top agencies HHS (Department of Health and Human Services)	$331,388	0.5%	Rank history: not on the FY2021–FY2024 lists and #18 in FY2025; new, not ranked in Aug 2024–Jul 2025.
19	Akina Inc. Top agencies HHS (Department of Health and Human Services)	$283,778	0.4%	Rank history: not on the FY2021–FY2022 lists, #19 in FY2023, #29 in FY2024 and not on the FY2025 list; up 3 since Aug 2024–Jul 2025.
20	BSA Environmental Services Inc. Top agencies Army (Department of the Army)	$257,678	0.4%	Rank history: not on the FY2021–FY2023 lists, #22 in FY2024 and #23 in FY2025; down 2 since Aug 2024–Jul 2025.
21	Emory University Top agencies HHS (Department of Health and Human Services)	$249,824	0.4%	Rank history: #95 in FY2021, not on the FY2022–FY2023 lists, #53 in FY2024 and #19 in FY2025; new, not ranked in Aug 2024–Jul 2025.
22	Christie Bryant Inc Through Bryant Christie Inc. Top agencies USDA (Department of Agriculture)	$235,432	0.3%	Rank history: not on the FY2021–FY2023 lists, #28 in FY2024 and #20 in FY2025; down 5 since Aug 2024–Jul 2025.
23	The Boeing Company Top agencies Navy (Department of the Navy)	$230,467	0.3%	Rank history: #69 in FY2021, #24 in FY2022, #40 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
24	Dajani LLC Top agencies Army (Department of the Army)	$140,001	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
25	Shannon & Wilson Inc. Top agencies Army (Department of the Army)	$139,557	0.2%	Rank history: not on the FY2021–FY2024 lists and #44 in FY2025; new, not ranked in Aug 2024–Jul 2025.
26	Feamax LLC Top agencies Treasury (Department of the Treasury)	$127,000	0.2%	Rank history: not on the FY2021–FY2023 lists, #47 in FY2024 and not on the FY2025 list; up 10 since Aug 2024–Jul 2025.
27	Azenta US Inc. Top agencies VA (Department of Veterans Affairs)	$110,000	0.2%	Rank history: not on the FY2021–FY2023 lists, #42 in FY2024 and #26 in FY2025; up 4 since Aug 2024–Jul 2025.
28	Chemogenics Biopharma, LLC Top agencies HHS (Department of Health and Human Services)	$101,000	0.1%	Rank history: not on the FY2021–FY2022 lists, #94 in FY2023, #32 in FY2024 and #27 in FY2025; down 5 since Aug 2024–Jul 2025.
29	Siemens Industry Inc. Top agencies HHS (Department of Health and Human Services)	$91,040	0.1%	Rank history: not on the FY2021–FY2024 lists and #30 in FY2025; new, not ranked in Aug 2024–Jul 2025.
30	Diversity Arrays Technology PTY Limited Top agencies DOI (Department of the Interior)	$81,200	0.1%	Rank history: #73 in FY2021, not on the FY2022 list, #49 in FY2023, not on the FY2024 list and #55 in FY2025; up 41 since Aug 2024–Jul 2025.
31	Architectural Testing Inc. 2 awardees, including Intertek Testing Services NA, Inc. Top agencies GSA (General Services Administration)	$75,610	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
32	Bethel Engineering & Consulting LLC Top agencies DOI (Department of the Interior)	$64,017	0.1%	Rank history: not on the FY2021–FY2024 lists and #33 in FY2025; new, not ranked in Aug 2024–Jul 2025.
33	Western Kentucky University Top agencies DOI (Department of the Interior)	$60,800	0.1%	Rank history: #58 in FY2021, not on the FY2022 list, #72 in FY2023, #58 in FY2024 and #50 in FY2025; up 29 since Aug 2024–Jul 2025.
34	Green Mountain Antibodies, Inc. Top agencies USDA (Department of Agriculture)	$60,240	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
35	Atlantic Testing Laboratories, Limited Top agencies Army (Department of the Army)	$51,400	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
36	ELI E Agbayani Top agencies Smithsonian (Smithsonian Institution)	$49,819	0.1%	Rank history: not on the FY2021–FY2022 lists, #54 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
37	Brigham Young University Top agencies DOI (Department of the Interior)	$49,253	0.1%	Rank history: not on the FY2021–FY2024 lists and #70 in FY2025; up 53 since Aug 2024–Jul 2025.
38	The Smithers Group Inc Through Smithers Ers LLC Top agencies USDA (Department of Agriculture)	$47,505	0.1%	Rank history: not on the FY2021–FY2024 lists and #39 in FY2025; new, not ranked in Aug 2024–Jul 2025.
39	University of Massachusetts Top agencies Commerce (Department of Commerce)	$45,000	0.1%	Rank history: not on the FY2021–FY2023 lists, #72 in FY2024 and #41 in FY2025; up 22 since Aug 2024–Jul 2025.
40	Texas A & M Research Foundation Top agencies DOI (Department of the Interior)	$41,543	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
41	Johns Hopkins University Top agencies HHS (Department of Health and Human Services)	$39,996	0.1%	Rank history: not on the FY2021–FY2024 lists and #45 in FY2025; new, not ranked in Aug 2024–Jul 2025.
42	Leticia Diaz Top agencies DOI (Department of the Interior)	$39,694	0.1%	Rank history: not on the FY2021–FY2022 lists, #67 in FY2023, #63 in FY2024 and #31 in FY2025; up 12 since Aug 2024–Jul 2025.
43	Trustees of Dartmouth College Top agencies VA (Department of Veterans Affairs)	$37,620	0.1%	Rank history: not on the FY2021–FY2024 lists and #48 in FY2025; new, not ranked in Aug 2024–Jul 2025.
44	E.r. Analytical, Inc. Top agencies Army (Department of the Army)	$35,256	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
45	Florida Institute of Technology Inc. Top agencies Navy (Department of the Navy)	$34,026	<0.1%	Rank history: not on the FY2021–FY2024 lists and #65 in FY2025; new, not ranked in Aug 2024–Jul 2025.
46	Biodiscovery LLC Top agencies Smithsonian (Smithsonian Institution)	$26,487	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
47	Adam Ryan Baji Top agencies DOI (Department of the Interior)	$25,938	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
48	Bend Genetics LLC Top agencies DOI (Department of the Interior)	$24,600	<0.1%	Rank history: not on the FY2021 list, #77 in FY2022, #88 in FY2023, #87 in FY2024 and #53 in FY2025; up 43 since Aug 2024–Jul 2025.
49	Idexx Distribution, Inc. Top agencies HHS (Department of Health and Human Services)	$24,404	<0.1%	Rank history: #36 in FY2021, #36 in FY2022, #50 in FY2023, #48 in FY2024 and #25 in FY2025; down 20 since Aug 2024–Jul 2025.
50	Chemtrack Alaska, Inc. Top agencies DOI (Department of the Interior)	$22,631	<0.1%	Rank history: not on the FY2021–FY2024 lists and #63 in FY2025; new, not ranked in Aug 2024–Jul 2025.
51	Gtseek LLC Top agencies DOI (Department of the Interior)	$22,550	<0.1%	Rank history: not on the FY2021–FY2024 lists and #42 in FY2025; up 4 since Aug 2024–Jul 2025.
52	Novogene Corporation Inc Top agencies Commerce (Department of Commerce)	$20,000	<0.1%	Rank history: not on the FY2021–FY2023 lists, #78 in FY2024 and #64 in FY2025; up 18 since Aug 2024–Jul 2025.
53	Cumberland Valley Analytical Services, Inc. Top agencies USDA (Department of Agriculture)	$16,125	<0.1%	Rank history: not on the FY2021–FY2024 lists and #66 in FY2025; new, not ranked in Aug 2024–Jul 2025.
54	Charles River Laboratories International Inc. Through Charles River Laboratories, Inc. Top agencies HHS (Department of Health and Human Services)	$15,701	<0.1%	Rank history: #40 in FY2021, #66 in FY2022, #69 in FY2023, #71 in FY2024 and #28 in FY2025; down 20 since Aug 2024–Jul 2025.
55	I-2-I Solutions, Inc. Top agencies DOI (Department of the Interior)	$15,312	<0.1%	Rank history: not on the FY2021–FY2022 lists, #31 in FY2023, not on the FY2024 list and #52 in FY2025; up 9 since Aug 2024–Jul 2025.
56	VRL Maryland LLC Top agencies HHS (Department of Health and Human Services)	$14,094	<0.1%	Rank history: #70 in FY2021, #67 in FY2022, #74 in FY2023, not on the FY2024 list and #37 in FY2025; down 8 since Aug 2024–Jul 2025.
57	William Alexander Top agencies DOI (Department of the Interior)	$12,550	<0.1%	Rank history: not on the FY2021–FY2023 lists, #97 in FY2024 and #67 in FY2025; new, not ranked in Aug 2024–Jul 2025.
58	Beth Israel Lahey Health Inc. Through Beth Israel Deaconess Medical Center, Inc. Top agencies HHS (Department of Health and Human Services)	$8,118	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
59	Als Group Usa, Corp. Top agencies DOI (Department of the Interior)	$6,500	<0.1%	Rank history: not on the FY2021–FY2022 lists, #75 in FY2023, #60 in FY2024 and not on the FY2025 list; new, not ranked in Aug 2024–Jul 2025.
60	Cornell University Top agencies USDA (Department of Agriculture)	$5,000	<0.1%	Rank history: not on the FY2021–FY2024 lists and #77 in FY2025; new, not ranked in Aug 2024–Jul 2025.
61	Penrose Environmental, LLC Top agencies USDA (Department of Agriculture)	$4,600	<0.1%	Rank history: not on the FY2021–FY2024 lists and #75 in FY2025; up 34 since Aug 2024–Jul 2025.
62	SGS North America Inc. Top agencies DOI (Department of the Interior)	$4,381	<0.1%	Rank history: not on the FY2021–FY2024 lists and #78 in FY2025; new, not ranked in Aug 2024–Jul 2025.
63	Eliza Jane Ross Top agencies DOI (Department of the Interior)	$3,524	<0.1%	Rank history: not on the FY2021–FY2024 lists and #81 in FY2025; new, not ranked in Aug 2024–Jul 2025.
64	American Association for Laboratory Accreditation, Inc. Top agencies DOD (Department of Defense)	$1,400	<0.1%	Rank history: not on the FY2021 list, #99 in FY2022, not on the FY2023–FY2024 lists and #69 in FY2025; up 24 since Aug 2024–Jul 2025.
65	Landauer, Inc. Top agencies Navy (Department of the Navy)	$951	<0.1%	Rank history: not on the FY2021–FY2024 lists and #80 in FY2025; new, not ranked in Aug 2024–Jul 2025.
66	Radonova Inc. Top agencies Navy (Department of the Navy)	$547	<0.1%	Rank history: not on the FY2021–FY2022 lists, #63 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Aug 2024–Jul 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 $68.4 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