Top 100 Contractors in NAICS 621511: Medical Laboratories, FY2025

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Laboratory Corporation of America Holdings 10 awardees, including Laboratory Corporation of America, Center for Disease Detection, LLC and NWT Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) Army (Department of the Army)	$143,558,138	24.8%	Rank history: #4 in FY2021, #3 in FY2022, #2 in FY2023 and #1 in FY2024; unchanged since FY2024.
2	Quest Diagnostics Incorporated 8 awardees, including Ameripath Inc., Quest Diagnostics Nichols Institute Inc. and Quest Diagnostics of Puerto Rico Inc. Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice) DHA (Defense Health Agency)	$99,352,807	17.1%	Rank history: #5 in FY2021, #4 in FY2022, #1 in FY2023 and #2 in FY2024; unchanged since FY2024.
3	Roche Holdings Inc. 2 awardees, including Foundation Medicine, Inc. and Roche Diagnostics Corporation Top agencies VA (Department of Veterans Affairs)	$47,975,879	8.3%	Rank history: not on the FY2021–FY2024 lists; new.
4	SNA International LLC Top agencies WHS (DOD Washington Headquarters Service)	$17,830,866	3.1%	Rank history: not on the FY2021 list, #11 in FY2022, #6 in FY2023 and #4 in FY2024; unchanged since FY2024.
5	The Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc. Top agencies DHA (Defense Health Agency)	$12,003,842	2.1%	Rank history: #24 in FY2021, #15 in FY2022, #8 in FY2023 and #8 in FY2024; up 3 since FY2024.
6	Baylor College of Medicine Through Baylor Miraca Genetics Laboratories LLC Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) DHA (Defense Health Agency)	$11,645,670	2.0%	Rank history: not on the FY2021–FY2024 lists; up 289 since FY2024.
7	Family Health International Top agencies USAID (US Agency for International Development)	$9,456,610	1.6%	Rank history: not on the FY2021–FY2023 lists and #16 in FY2024; up 9 since FY2024.
8	College of American Pathologists Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$9,208,194	1.6%	Rank history: not on the FY2021–FY2024 lists; up 108 since FY2024.
9	University of Utah 2 awardees, including Arup Laboratories Inc. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) Army (Department of the Army)	$7,420,079	1.3%	Rank history: #23 in FY2021, #16 in FY2022, #10 in FY2023 and #36 in FY2024; up 27 since FY2024.
10	Fulgent Genetics, Inc. 2 awardees, including Fulgent Therapeutics LLC Top agencies VA (Department of Veterans Affairs)	$7,414,652	1.3%	Rank history: #10 in FY2021, #19 in FY2022, #26 in FY2023 and #9 in FY2024; down 1 since FY2024.
11	Mayo Collaborative Services, Inc. Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$6,896,510	1.2%	Rank history: #69 in FY2021, not on the FY2022–FY2023 lists and #12 in FY2024; up 1 since FY2024.
12	Tempus AI, Inc. 2 awardees, including Ambry Genetics Corporation Top agencies VA (Department of Veterans Affairs)	$5,734,095	1.0%	Rank history: not on the FY2021 list, #21 in FY2022, #30 in FY2023 and #6 in FY2024; down 6 since FY2024.
13	Abbott Laboratories Inc. 7 awardees, including Pembrooke Occupational Health, Inc., Exact Sciences Corporation and Alere Toxicology Services, Inc. Top agencies OSD (Office of the Secretary of Defense) VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$5,714,029	1.0%	Rank history: #29 in FY2021, #17 in FY2022, #12 in FY2023 and #7 in FY2024; down 6 since FY2024.
14	Northern Plains Laboratory LLC Top agencies HHS (Department of Health and Human Services) Army (Department of the Army)	$4,619,960	0.8%	Rank history: #33 in FY2021, #25 in FY2022, #15 in FY2023 and #14 in FY2024; unchanged since FY2024.
15	Sonora Quest Laboratories LLC Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$4,484,426	0.8%	Rank history: not on the FY2021–FY2023 lists and #11 in FY2024; down 4 since FY2024.
16	Caredx, Inc. 2 awardees Top agencies VA (Department of Veterans Affairs)	$4,139,251	0.7%	Rank history: not on the FY2021 list, #40 in FY2022, #24 in FY2023 and #52 in FY2024; up 36 since FY2024.
17	Creative Testing Solutions Top agencies DHA (Defense Health Agency)	$3,574,913	0.6%	Rank history: #46 in FY2021, #23 in FY2022, #34 in FY2023 and #22 in FY2024; up 5 since FY2024.
18	Oregon Health & Science University Top agencies VA (Department of Veterans Affairs)	$3,081,030	0.5%	Rank history: #30 in FY2021, #44 in FY2022, #25 in FY2023 and #20 in FY2024; up 2 since FY2024.
19	Labcorp Oklahoma Inc. Top agencies HHS (Department of Health and Human Services)	$2,903,000	0.5%	Rank history: not on the FY2021–FY2022 lists, #28 in FY2023 and #28 in FY2024; up 9 since FY2024.
20	Tatitlek Federal Services LLC Top agencies Army (Department of the Army)	$2,851,300	0.5%	Rank history: not on the FY2021–FY2023 lists and #17 in FY2024; down 3 since FY2024.
21	Cherokee Nation Through Cherokee Nation Operational Solutions, L.L.C. Top agencies HHS (Department of Health and Human Services)	$2,707,088	0.5%	Rank history: not on the FY2021–FY2024 lists; new.
22	Vitalant Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$2,466,282	0.4%	Rank history: #62 in FY2021, #65 in FY2022, #61 in FY2023 and not on the FY2024 list; returned.
23	Neogenomics Inc. Through Neogenomics Laboratories, Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$2,089,681	0.4%	Rank history: not on the FY2021–FY2023 lists and #19 in FY2024; down 4 since FY2024.
24	Deployed Resources LLC Top agencies HHS (Department of Health and Human Services)	$1,907,209	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
25	Bloodworks Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs)	$1,836,215	0.3%	Rank history: #44 in FY2021, #64 in FY2022, #65 in FY2023 and #67 in FY2024; up 42 since FY2024.
26	University of Wisconsin Hospitals and Clinics Authority Top agencies VA (Department of Veterans Affairs)	$1,724,277	0.3%	Rank history: not on the FY2021–FY2023 lists and #100 in FY2024; up 74 since FY2024.
27	Ginkgo Bioworks Holdings Inc. Through Ginkgo Bioworks, Inc. Top agencies HHS (Department of Health and Human Services)	$1,721,834	0.3%	Rank history: not on the FY2021–FY2023 lists and #24 in FY2024; down 3 since FY2024.
28	Prairie Band Health Services Inc. Top agencies HHS (Department of Health and Human Services)	$1,700,920	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
29	Commonspirit Health Through Commonspirit Oregon Top agencies VA (Department of Veterans Affairs)	$1,598,281	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
30	Mariano Prime LLC Top agencies DHA (Defense Health Agency)	$1,541,391	0.3%	Rank history: not on the FY2021–FY2023 lists and #26 in FY2024; down 4 since FY2024.
31	Veracyte, Inc. 2 awardees, including Veracyte Labs SD Corporation Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$1,526,706	0.3%	Rank history: not on the FY2021 list, #85 in FY2022, #49 in FY2023 and #46 in FY2024; up 15 since FY2024.
32	University of Washington 2 awardees, including University of Washington School of Medicine Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) Commerce (Department of Commerce)	$1,504,888	0.3%	Rank history: #39 in FY2021, #27 in FY2022 and not on the FY2023–FY2024 lists; up 80 since FY2024.
33	La Nigerienne D' Assurances Et De Reassurances NIA Top agencies DOS (Department of State)	$1,491,017	0.3%	Rank history: not on the FY2021–FY2024 lists; up 132 since FY2024.
34	Avmedical LLC Top agencies VA (Department of Veterans Affairs)	$1,449,100	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
35	Upmc 2 awardees, including Upmc Presbyterian Shadyside and Upmc Western Maryland Corp Top agencies VA (Department of Veterans Affairs)	$1,422,020	0.2%	Rank history: #41 in FY2021, #38 in FY2022, #36 in FY2023 and not on the FY2024 list; returned.
36	Cytopath Biopsy Lab Inc. Top agencies VA (Department of Veterans Affairs)	$1,393,165	0.2%	Rank history: not on the FY2021–FY2023 lists and #58 in FY2024; up 22 since FY2024.
37	Navitas Clinical Research Inc. Top agencies HHS (Department of Health and Human Services)	$1,388,618	0.2%	Rank history: not on the FY2021–FY2023 lists and #33 in FY2024; down 4 since FY2024.
38	Danaher Corporation 2 awardees, including Cepheid and Beckman Coulter Gesellschaft MIT Beschraenkter Haftung Top agencies HHS (Department of Health and Human Services) DHA (Defense Health Agency)	$1,243,085	0.2%	Rank history: #35 in FY2021, #58 in FY2022, #29 in FY2023 and #35 in FY2024; down 3 since FY2024.
39	Physicians Laboratory, P.C. Top agencies VA (Department of Veterans Affairs)	$1,062,850	0.2%	Rank history: not on the FY2021 list, #42 in FY2022, #50 in FY2023 and #50 in FY2024; up 11 since FY2024.
40	Diagnostic Laboratory Services, Inc. Top agencies VA (Department of Veterans Affairs) Navy (Department of the Navy) HHS (Department of Health and Human Services)	$1,044,040	0.2%	Rank history: not on the FY2021–FY2023 lists and #57 in FY2024; up 17 since FY2024.
41	California Department of Public Health Top agencies DHA (Defense Health Agency)	$1,038,696	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
42	Loyola University Health System Top agencies VA (Department of Veterans Affairs)	$1,037,000	0.2%	Rank history: not on the FY2021–FY2024 lists; up 79 since FY2024.
43	Genscript USA Inc. Top agencies HHS (Department of Health and Human Services)	$1,026,000	0.2%	Rank history: #56 in FY2021, #51 in FY2022, #47 in FY2023 and #42 in FY2024; down 1 since FY2024.
44	Iowa Pathology Associates, P.C. Top agencies VA (Department of Veterans Affairs)	$1,005,863	0.2%	Rank history: not on the FY2021–FY2022 lists, #58 in FY2023 and #82 in FY2024; up 38 since FY2024.
45	The Vanderbilt University Through Vanderbilt University Medical Center Top agencies VA (Department of Veterans Affairs)	$998,749	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
46	South Central Pathology Lab Pa Top agencies VA (Department of Veterans Affairs)	$958,089	0.2%	Rank history: #87 in FY2021, #63 in FY2022, #76 in FY2023 and #70 in FY2024; up 24 since FY2024.
47	Cardionet LLC Top agencies VA (Department of Veterans Affairs)	$948,502	0.2%	Rank history: not on the FY2021–FY2023 lists and #40 in FY2024; down 7 since FY2024.
48	The University of Iowa Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$882,924	0.2%	Rank history: not on the FY2021–FY2022 lists, #72 in FY2023 and #44 in FY2024; down 4 since FY2024.
49	Stanford Health Care Top agencies VA (Department of Veterans Affairs)	$859,551	0.1%	Rank history: not on the FY2021–FY2024 lists; up 102 since FY2024.
50	One Stop Recruiting LLC Top agencies VA (Department of Veterans Affairs)	$848,028	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
51	Regents of the University of Michigan Top agencies VA (Department of Veterans Affairs)	$818,593	0.1%	Rank history: #70 in FY2021, #92 in FY2022, #53 in FY2023 and #43 in FY2024; down 8 since FY2024.
52	Sophia Genetics Inc. Top agencies DHA (Defense Health Agency)	$731,240	0.1%	Rank history: not on the FY2021–FY2022 lists, #68 in FY2023 and not on the FY2024 list; returned.
53	Partners Healthcare System Incorporated 2 awardees, including Brigham & Womens Hospital Inc. and Massachusetts General Physicians Organization, Inc. Top agencies VA (Department of Veterans Affairs)	$722,279	0.1%	Rank history: #81 in FY2021, #69 in FY2022, #39 in FY2023 and #47 in FY2024; down 6 since FY2024.
54	Biodesix, Inc. Top agencies VA (Department of Veterans Affairs)	$690,901	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
55	Regents of the University of Minnesota Top agencies HHS (Department of Health and Human Services)	$674,381	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
56	University of Texas System 2 awardees, including The University of Texas Southwestern Medical Center Top agencies VA (Department of Veterans Affairs)	$644,857	0.1%	Rank history: not on the FY2021 list, #36 in FY2022, #81 in FY2023 and #29 in FY2024; down 27 since FY2024.
57	Nephropathology Associates, PLC Top agencies VA (Department of Veterans Affairs)	$635,621	0.1%	Rank history: not on the FY2021 list, #98 in FY2022, not on the FY2023 list and #99 in FY2024; up 42 since FY2024.
58	National Medical Services, Inc. Top agencies HHS (Department of Health and Human Services) DOJ (Department of Justice)	$626,542	0.1%	Rank history: not on the FY2021–FY2022 lists, #74 in FY2023 and #64 in FY2024; up 6 since FY2024.
59	Genomic Health, Inc. 2 awardees, including Preventiongenetics LLC Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs)	$609,826	0.1%	Rank history: #20 in FY2021, #47 in FY2022, #20 in FY2023 and #21 in FY2024; down 38 since FY2024.
60	Department of General Services Virginia Top agencies DHA (Defense Health Agency)	$607,200	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
61	Amprion, Inc. Top agencies HHS (Department of Health and Human Services)	$598,400	0.1%	Rank history: not on the FY2021–FY2022 lists, #42 in FY2023 and #72 in FY2024; up 11 since FY2024.
62	State of South Carolina Through Medical University Hospital Authority Top agencies VA (Department of Veterans Affairs)	$587,926	0.1%	Rank history: not on the FY2021 list, #73 in FY2022, not on the FY2023 list and #38 in FY2024; down 24 since FY2024.
63	Central TOX LLC Top agencies VA (Department of Veterans Affairs) Army (Department of the Army)	$586,349	0.1%	Rank history: not on the FY2021 list, #82 in FY2022, #64 in FY2023 and #62 in FY2024; down 1 since FY2024.
64	Psomagen Inc. Top agencies HHS (Department of Health and Human Services)	$585,703	0.1%	Rank history: not on the FY2021–FY2023 lists and #25 in FY2024; down 39 since FY2024.
65	Incyte Pathology, P.S Top agencies VA (Department of Veterans Affairs)	$585,330	0.1%	Rank history: not on the FY2021 list, #53 in FY2022, #51 in FY2023 and #86 in FY2024; up 21 since FY2024.
66	Yale Univ Top agencies VA (Department of Veterans Affairs) Navy (Department of the Navy)	$581,708	0.1%	Rank history: not on the FY2021 list, #29 in FY2022, #83 in FY2023 and #81 in FY2024; up 15 since FY2024.
67	Peninsula Histopathology Laboratory Inc. Top agencies VA (Department of Veterans Affairs)	$540,592	0.1%	Rank history: #86 in FY2021, #71 in FY2022, #48 in FY2023 and #71 in FY2024; up 4 since FY2024.
68	Medical University Hospital Authority Top agencies VA (Department of Veterans Affairs)	$518,369	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
69	Research Triangle Institute Top agencies HHS (Department of Health and Human Services)	$508,380	0.1%	Rank history: not on the FY2021 list, #30 in FY2022, #17 in FY2023 and #56 in FY2024; down 13 since FY2024.
70	Dhhs State Public Health Lab Top agencies DHA (Defense Health Agency)	$506,880	0.1%	Rank history: not on the FY2021–FY2023 lists and #65 in FY2024; down 5 since FY2024.
71	Chesapeake Toxicology Resources, LLC Top agencies DOT (Department of Transportation)	$506,319	0.1%	Rank history: not on the FY2021–FY2022 lists, #94 in FY2023 and #73 in FY2024; up 2 since FY2024.
72	Mdxhealth Inc. Top agencies VA (Department of Veterans Affairs)	$494,260	0.1%	Rank history: not on the FY2021–FY2022 lists, #69 in FY2023 and #61 in FY2024; down 11 since FY2024.
73	The Chenega Corporation Through Chenega Tri-Services, LLC Top agencies DHA (Defense Health Agency)	$490,052	0.1%	Rank history: not on the FY2021 list, #88 in FY2022, #80 in FY2023 and not on the FY2024 list; returned.
74	Fresenius Medical Care Holdings Inc. Through Dialysis Clinic, Inc. Top agencies VA (Department of Veterans Affairs)	$477,990	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
75	Interpath Laboratory, Inc. Top agencies VA (Department of Veterans Affairs)	$476,970	0.1%	Rank history: not on the FY2021–FY2024 lists; up 34 since FY2024.
76	American Veteran Contracting Solutions LLC Top agencies VA (Department of Veterans Affairs)	$468,000	0.1%	Rank history: #82 in FY2021, #83 in FY2022, #79 in FY2023 and #75 in FY2024; down 1 since FY2024.
77	University of California, LOS Angeles Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$466,224	0.1%	Rank history: not on the FY2021–FY2023 lists and #63 in FY2024; down 14 since FY2024.
78	Fairbanks Memorial Hospital, LLC Top agencies DHA (Defense Health Agency)	$459,148	0.1%	Rank history: not on the FY2021–FY2023 lists and #92 in FY2024; up 14 since FY2024.
79	Indiana University Health, Inc. Top agencies VA (Department of Veterans Affairs)	$453,980	0.1%	Rank history: #95 in FY2021, #97 in FY2022, #91 in FY2023 and #77 in FY2024; down 2 since FY2024.
80	Aegis Toxicology Sciences Corporation Through Aegis Sciences Corporation Top agencies HHS (Department of Health and Human Services)	$448,446	0.1%	Rank history: not on the FY2021–FY2023 lists and #39 in FY2024; down 41 since FY2024.
81	Eurofins Transplant Genomics, LLC Top agencies VA (Department of Veterans Affairs)	$440,000	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
82	Thermo Fisher Scientific Inc. 2 awardees, including Fisher Scientific Company L.L.C. Top agencies HHS (Department of Health and Human Services)	$418,200	0.1%	Rank history: not on the FY2021–FY2024 lists; up 94 since FY2024.
83	Tricore, Inc. Top agencies HHS (Department of Health and Human Services)	$417,640	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
84	LHC Group, Inc. Through Healthcare Connections, Inc. Top agencies VA (Department of Veterans Affairs)	$404,739	0.1%	Rank history: not on the FY2021–FY2024 lists; up 47 since FY2024.
85	San Diego Pathologists Medical Group, Inc. Top agencies VA (Department of Veterans Affairs)	$395,833	0.1%	Rank history: not on the FY2021–FY2022 lists, #84 in FY2023 and #59 in FY2024; down 26 since FY2024.
86	Summit Pathology Top agencies VA (Department of Veterans Affairs)	$394,094	0.1%	Rank history: #98 in FY2021, not on the FY2022–FY2023 lists and #95 in FY2024; up 9 since FY2024.
87	Oregon Health Authority-Public Health Top agencies DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$386,516	0.1%	Rank history: not on the FY2021–FY2023 lists and #88 in FY2024; up 1 since FY2024.
88	Appddictionstudio Limited Liability Company Top agencies DHA (Defense Health Agency) USAF (Department of the Air Force)	$375,371	0.1%	Rank history: not on the FY2021–FY2023 lists and #23 in FY2024; down 65 since FY2024.
89	Bml, Inc. Top agencies DHA (Defense Health Agency)	$339,267	0.1%	Rank history: #31 in FY2021, #49 in FY2022 and not on the FY2023–FY2024 lists; returned.
90	Hennepin County Through Hennepin Healthcare System Inc. Top agencies VA (Department of Veterans Affairs)	$338,273	0.1%	Rank history: #51 in FY2021 and not on the FY2022–FY2024 lists; returned.
91	All American Express Solutions LLC Top agencies VA (Department of Veterans Affairs)	$335,862	0.1%	Rank history: not on the FY2021–FY2023 lists and #89 in FY2024; down 2 since FY2024.
92	Bioscientia Institut FÜR Medizinische Diagnostik GMBH Top agencies DHA (Defense Health Agency)	$329,765	0.1%	Rank history: not on the FY2021–FY2024 lists; up 49 since FY2024.
93	The Pathology Group, P.C Top agencies VA (Department of Veterans Affairs)	$327,237	0.1%	Rank history: not on the FY2021–FY2022 lists, #97 in FY2023 and #90 in FY2024; down 3 since FY2024.
94	The Broad Institute, Inc. 2 awardees, including Broad Clinical Laboratories, LLC Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$311,350	0.1%	Rank history: #9 in FY2021 and not on the FY2022–FY2024 lists; up 101 since FY2024.
95	The Association of University Physicians Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$299,158	0.1%	Rank history: not on the FY2021 list, #86 in FY2022, #90 in FY2023 and not on the FY2024 list; up 24 since FY2024.
96	Research and Diagnostic Systems Inc Through Exosome Diagnostics Inc. Top agencies VA (Department of Veterans Affairs)	$294,800	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
97	Sysmex America Inc. Top agencies DHA (Defense Health Agency)	$290,493	0.1%	Rank history: not on the FY2021–FY2024 lists; up 41 since FY2024.
98	University of Minnesota Physicians Top agencies VA (Department of Veterans Affairs)	$286,966	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 36 since FY2024.
99	Dentrust Dental International, Inc. Top agencies DHS (Department of Homeland Security)	$283,849	<0.1%	Rank history: not on the FY2021 list, #100 in FY2022, #86 in FY2023 and #84 in FY2024; down 15 since FY2024.
100	Goss Service Associates LLC Top agencies VA (Department of Veterans Affairs)	$280,492	<0.1%	Rank history: not on the FY2021 list, #96 in FY2022, #96 in FY2023 and not on the FY2024 list; up 2 since FY2024.

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 $580 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.
• 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