Top 100 Contractors in PSC Q301: Reference Laboratory Testing, FY2025

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Laboratory Corporation of America Holdings 7 awardees, including Laboratory Corporation of America, Center for Disease Detection, LLC and Esoterix Genetic Laboratories LLC Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) Army (Department of the Army)	$140,966,497	20.5%	Rank history: #23 in FY2021, #9 in FY2022, #1 in FY2023 and #1 in FY2024; unchanged since FY2024.
2	Quest Diagnostics Incorporated 8 awardees, including Quest Diagnostics Clinical Laboratories, Inc., Ameripath Inc. and Quest Diagnostics Nichols Institute Inc. Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice) DOI (Department of the Interior)	$93,488,774	13.6%	Rank history: #7 in FY2021, #4 in FY2022, #2 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) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$50,084,710	7.3%	Rank history: not on the FY2021–FY2024 lists; new.
4	Baylor College of Medicine 2 awardees, including Baylor Miraca Genetics Laboratories LLC Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) DHA (Defense Health Agency)	$16,729,441	2.4%	Rank history: #65 in FY2021, #75 in FY2022, #58 in FY2023 and not on the FY2024 list; returned.
5	Personalis, Inc. Top agencies VA (Department of Veterans Affairs)	$13,831,100	2.0%	Rank history: not on the FY2021 list, #20 in FY2022, #14 in FY2023 and #8 in FY2024; up 3 since FY2024.
6	The Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc. Top agencies DHA (Defense Health Agency)	$12,003,842	1.7%	Rank history: #49 in FY2021, #23 in FY2022, #7 in FY2023 and #14 in FY2024; up 8 since FY2024.
7	MRIGLOBAL Top agencies HHS (Department of Health and Human Services)	$9,351,498	1.4%	Rank history: not on the FY2021–FY2022 lists, #22 in FY2023 and #7 in FY2024; unchanged since FY2024.
8	College of American Pathologists Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) DOJ (Department of Justice)	$9,129,811	1.3%	Rank history: not on the FY2021–FY2024 lists; up 202 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)	$7,819,579	1.1%	Rank history: #48 in FY2021, #24 in FY2022, #11 in FY2023 and #61 in FY2024; up 52 since FY2024.
10	Azenta US Inc. Top agencies HHS (Department of Health and Human Services) USDA (Department of Agriculture) VA (Department of Veterans Affairs)	$7,515,588	1.1%	Rank history: not on the FY2021–FY2024 lists; new.
11	Abbott Laboratories Inc. 6 awardees, including Pembrooke Occupational Health, Inc., Exact Sciences Corporation and Alere Toxicology Services, Inc. Top agencies OSD (Office of the Secretary of Defense) DOI (Department of the Interior) VA (Department of Veterans Affairs)	$7,425,347	1.1%	Rank history: #39 in FY2021, #25 in FY2022, #12 in FY2023 and #9 in FY2024; down 2 since FY2024.
12	Fulgent Genetics, Inc. 2 awardees, including Fulgent Therapeutics LLC Top agencies VA (Department of Veterans Affairs)	$7,390,617	1.1%	Rank history: #12 in FY2021, #31 in FY2022, #45 in FY2023 and #17 in FY2024; up 5 since FY2024.
13	The Leland Stanford Junior University 3 awardees, including Stanford Hospital & Clinics Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$7,345,325	1.1%	Rank history: #88 in FY2021, #57 in FY2022, #20 in FY2023 and #6 in FY2024; down 7 since FY2024.
14	Mayo Collaborative Services, Inc. Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$7,044,037	1.0%	Rank history: not on the FY2021–FY2023 lists and #23 in FY2024; up 9 since FY2024.
15	Infinity Biologix LLC Top agencies VA (Department of Veterans Affairs)	$6,111,557	0.9%	Rank history: #15 in FY2021, #16 in FY2022, not on the FY2023 list and #10 in FY2024; down 5 since FY2024.
16	Tempus AI, Inc. 2 awardees, including Ambry Genetics Corporation Top agencies VA (Department of Veterans Affairs)	$5,734,095	0.8%	Rank history: not on the FY2021 list, #37 in FY2022, #55 in FY2023 and #5 in FY2024; down 11 since FY2024.
17	Akahi Associates, LLC 2 awardees, including Akahi Ingenesis Partners LLC Top agencies DHA (Defense Health Agency) Army (Department of the Army) USAF (Department of the Air Force)	$5,339,429	0.8%	Rank history: not on the FY2021–FY2024 lists; new.
18	Sysmex America Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$4,722,118	0.7%	Rank history: not on the FY2021–FY2023 lists and #50 in FY2024; up 32 since FY2024.
19	Northern Plains Laboratory LLC Top agencies HHS (Department of Health and Human Services) Army (Department of the Army)	$4,619,960	0.7%	Rank history: #64 in FY2021, #56 in FY2022, #28 in FY2023 and #25 in FY2024; up 6 since FY2024.
20	Sonora Quest Laboratories LLC Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$4,619,944	0.7%	Rank history: not on the FY2021–FY2023 lists and #19 in FY2024; down 1 since FY2024.
21	Sports Medicine Research and Testing Laboratory Top agencies Navy (Department of the Navy) DHA (Defense Health Agency)	$4,093,670	0.6%	Rank history: not on the FY2021–FY2023 lists and #21 in FY2024; unchanged since FY2024.
22	Akesogen, Inc. Top agencies VA (Department of Veterans Affairs)	$4,000,000	0.6%	Rank history: #34 in FY2021, #14 in FY2022, #19 in FY2023 and #22 in FY2024; unchanged since FY2024.
23	AB Staffing Solutions LLC Top agencies HHS (Department of Health and Human Services)	$3,772,178	0.5%	Rank history: #95 in FY2021, #39 in FY2022, #17 in FY2023 and #16 in FY2024; down 7 since FY2024.
24	Oregon Health & Science University Top agencies VA (Department of Veterans Affairs)	$3,231,206	0.5%	Rank history: #56 in FY2021, #83 in FY2022, #44 in FY2023 and #36 in FY2024; up 12 since FY2024.
25	One Stop Recruiting LLC Top agencies VA (Department of Veterans Affairs)	$3,181,663	0.5%	Rank history: #100 in FY2021, #42 in FY2022, #38 in FY2023 and #35 in FY2024; up 10 since FY2024.
26	Danaher Corporation 6 awardees, including Beckman Coulter, Inc., Cepheid and Leica Microsystems Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$3,125,254	0.5%	Rank history: #42 in FY2021, #26 in FY2022, #13 in FY2023 and not on the FY2024 list; up 86 since FY2024.
27	Oneblood, Inc. Top agencies VA (Department of Veterans Affairs)	$2,996,700	0.4%	Rank history: not on the FY2021–FY2023 lists and #30 in FY2024; up 3 since FY2024.
28	Verily Life Sciences LLC Top agencies HHS (Department of Health and Human Services)	$2,994,243	0.4%	Rank history: not on the FY2021–FY2024 lists; new.
29	Bloodworks Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs)	$2,902,844	0.4%	Rank history: #69 in FY2021, #35 in FY2022, #31 in FY2023 and #43 in FY2024; up 14 since FY2024.
30	Tatitlek Federal Services LLC Top agencies Army (Department of the Army)	$2,851,300	0.4%	Rank history: not on the FY2021–FY2023 lists and #32 in FY2024; up 2 since FY2024.
31	11100 Billingsley Road Opco LLC Top agencies CSOSA (Court Services and Offender Supervision Agency)	$2,815,763	0.4%	Rank history: not on the FY2021–FY2023 lists and #28 in FY2024; down 3 since FY2024.
32	University of Washington 2 awardees, including University of Washington School of Medicine Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) DHA (Defense Health Agency)	$2,792,895	0.4%	Rank history: #75 in FY2021, #58 in FY2022 and not on the FY2023–FY2024 lists; up 102 since FY2024.
33	Labcorp Oklahoma Inc. Top agencies HHS (Department of Health and Human Services)	$2,733,000	0.4%	Rank history: not on the FY2021–FY2022 lists, #52 in FY2023 and #51 in FY2024; up 18 since FY2024.
34	Fundacion Inciensa Top agencies HHS (Department of Health and Human Services)	$2,629,040	0.4%	Rank history: #38 in FY2021, #21 in FY2022, #8 in FY2023 and #11 in FY2024; down 23 since FY2024.
35	State of South Carolina 2 awardees, including The Medical University of South Carolina and Medical University Hospital Authority Top agencies VA (Department of Veterans Affairs)	$2,584,181	0.4%	Rank history: #60 in FY2021, #38 in FY2022, #26 in FY2023 and #12 in FY2024; down 23 since FY2024.
36	The Vanderbilt University Through Vanderbilt University Medical Center Top agencies VA (Department of Veterans Affairs)	$2,508,302	0.4%	Rank history: not on the FY2021–FY2024 lists; up 251 since FY2024.
37	Blood Systems Inc. 2 awardees, including Vitalant Top agencies HHS (Department of Health and Human Services)	$2,452,535	0.4%	Rank history: not on the FY2021–FY2024 lists; up 420 since FY2024.
38	Creative Testing Solutions Top agencies DHA (Defense Health Agency)	$2,419,193	0.4%	Rank history: not on the FY2021 list, #60 in FY2022, #89 in FY2023 and #55 in FY2024; up 17 since FY2024.
39	Bristol Bay Native Corporation 2 awardees, including Eagle Integrated Services, LLC and Eagle Health Analytics, LLC Top agencies Navy (Department of the Navy) Army (Department of the Army)	$2,340,604	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
40	Neogenomics Inc. Through Neogenomics Laboratories, Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$1,945,673	0.3%	Rank history: not on the FY2021–FY2023 lists and #33 in FY2024; down 7 since FY2024.
41	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.
42	Transnetyx Inc. Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$1,854,335	0.3%	Rank history: not on the FY2021–FY2023 lists and #44 in FY2024; up 2 since FY2024.
43	Ginkgo Bioworks Holdings Inc. Through Ginkgo Bioworks, Inc. Top agencies HHS (Department of Health and Human Services)	$1,721,834	0.2%	Rank history: not on the FY2021–FY2023 lists and #38 in FY2024; down 5 since FY2024.
44	Prairie Band Health Services Inc. Top agencies HHS (Department of Health and Human Services)	$1,700,920	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
45	Commonspirit Health Through Commonspirit Oregon Top agencies VA (Department of Veterans Affairs)	$1,598,281	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
46	Ghost RX Inc. Top agencies VA (Department of Veterans Affairs)	$1,567,639	0.2%	Rank history: not on the FY2021 list, #62 in FY2022, #29 in FY2023 and #34 in FY2024; down 12 since FY2024.
47	Diagnostic Laboratory Services, Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) Navy (Department of the Navy)	$1,471,572	0.2%	Rank history: not on the FY2021–FY2023 lists and #71 in FY2024; up 24 since FY2024.
48	Cytopath Biopsy Lab Inc. Top agencies VA (Department of Veterans Affairs)	$1,461,165	0.2%	Rank history: not on the FY2021–FY2024 lists; up 69 since FY2024.
49	Upmc Through Upmc Presbyterian Shadyside Top agencies VA (Department of Veterans Affairs)	$1,419,465	0.2%	Rank history: #87 in FY2021, #79 in FY2022, #66 in FY2023 and not on the FY2024 list; returned.
50	DNA Labs International Inc Top agencies DOJ (Department of Justice) DHS (Department of Homeland Security)	$1,352,500	0.2%	Rank history: not on the FY2021 list, #89 in FY2022, #59 in FY2023 and #41 in FY2024; down 9 since FY2024.
51	Ansible Government Solutions LLC Top agencies VA (Department of Veterans Affairs)	$1,343,871	0.2%	Rank history: not on the FY2021 list, #29 in FY2022, #15 in FY2023 and #94 in FY2024; up 43 since FY2024.
52	Ambulnz Holdings, LLC Through Rapid Temps, LLC Top agencies HHS (Department of Health and Human Services)	$1,341,195	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
53	Caredx, Inc. 2 awardees Top agencies VA (Department of Veterans Affairs)	$1,305,518	0.2%	Rank history: not on the FY2021 list, #95 in FY2022, #88 in FY2023 and not on the FY2024 list; returned.
54	Government Scientific Source Inc. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$1,083,042	0.2%	Rank history: not on the FY2021–FY2022 lists, #70 in FY2023 and #84 in FY2024; up 30 since FY2024.
55	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)	$1,068,443	0.2%	Rank history: not on the FY2021–FY2022 lists, #81 in FY2023 and #83 in FY2024; up 28 since FY2024.
56	A-Team Solutions LLC Top agencies VA (Department of Veterans Affairs)	$1,041,743	0.2%	Rank history: not on the FY2021–FY2023 lists and #74 in FY2024; up 18 since FY2024.
57	J. Craig Venter Institute, Inc. Top agencies HHS (Department of Health and Human Services)	$1,041,427	0.2%	Rank history: not on the FY2021–FY2022 lists, #83 in FY2023 and #67 in FY2024; up 10 since FY2024.
58	Kaiser Foundation Hospitals Top agencies HHS (Department of Health and Human Services)	$1,040,333	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
59	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.
60	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 145 since FY2024.
61	University of Texas System 3 awardees, including The University of Texas Southwestern Medical Center, The University of Texas Health Science Center At San Antonio and University of Texas Health Science Center of San Antonio Top agencies VA (Department of Veterans Affairs)	$1,023,804	0.1%	Rank history: not on the FY2021 list, #51 in FY2022, #90 in FY2023 and #52 in FY2024; down 9 since FY2024.
62	Research Institute At Nationwide Children's Hospital Top agencies HHS (Department of Health and Human Services)	$1,002,589	0.1%	Rank history: not on the FY2021–FY2023 lists and #29 in FY2024; down 33 since FY2024.
63	Psomagen Inc. Top agencies HHS (Department of Health and Human Services)	$989,251	0.1%	Rank history: not on the FY2021–FY2023 lists and #27 in FY2024; down 36 since FY2024.
64	Regents of the University of Michigan Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$987,317	0.1%	Rank history: not on the FY2021–FY2022 lists, #84 in FY2023 and #63 in FY2024; down 1 since FY2024.
65	Ortho-Clinical Diagnostics Inc. 3 awardees Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$986,373	0.1%	Rank history: not on the FY2021–FY2024 lists; up 60 since FY2024.
66	Siemens Corporation 2 awardees, including Siemens Healthcare Diagnostics Inc. and Petnet Solutions, Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$954,583	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
67	Regents of the University of Minnesota Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$904,494	0.1%	Rank history: not on the FY2021–FY2024 lists; up 69 since FY2024.
68	Diagnostica Stago Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$881,833	0.1%	Rank history: not on the FY2021–FY2024 lists; up 38 since FY2024.
69	Biomerieux Inc. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) EPA (Environmental Protection Agency)	$874,844	0.1%	Rank history: not on the FY2021–FY2024 lists; up 319 since FY2024.
70	Stanford Health Care Top agencies VA (Department of Veterans Affairs)	$859,551	0.1%	Rank history: not on the FY2021–FY2024 lists; up 184 since FY2024.
71	Preventiongenetics LLC 2 awardees, including Genomic Health, Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$847,996	0.1%	Rank history: #61 in FY2021, not on the FY2022 list, #36 in FY2023 and #31 in FY2024; down 40 since FY2024.
72	LHC Group, Inc. Through Healthcare Connections, Inc. Top agencies VA (Department of Veterans Affairs)	$845,101	0.1%	Rank history: not on the FY2021–FY2023 lists and #70 in FY2024; down 2 since FY2024.
73	Sophia Genetics Inc. Top agencies DHA (Defense Health Agency)	$731,240	0.1%	Rank history: not on the FY2021–FY2023 lists and #66 in FY2024; down 7 since FY2024.
74	Appddictionstudio Limited Liability Company Top agencies USAF (Department of the Air Force) DHA (Defense Health Agency)	$731,153	0.1%	Rank history: not on the FY2021–FY2023 lists and #91 in FY2024; up 17 since FY2024.
75	Biodesix, Inc. Top agencies VA (Department of Veterans Affairs)	$722,814	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
76	Thermo Electron Corporation 4 awardees, including Fisher Bioservices Inc., Fisher Scientific Company L.L.C. and Olink Proteomics Inc. Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$710,414	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
77	Valor Network, Inc. Top agencies DHA (Defense Health Agency)	$675,967	0.1%	Rank history: not on the FY2021–FY2024 lists; up 173 since FY2024.
78	The Regents of the University of California. San Francisco Top agencies DOJ (Department of Justice)	$671,166	0.1%	Rank history: not on the FY2021–FY2023 lists and #69 in FY2024; down 9 since FY2024.
79	Muscogee Asset Protection, LLC Top agencies USAF (Department of the Air Force)	$657,096	0.1%	Rank history: not on the FY2021–FY2024 lists; up 78 since FY2024.
80	Vector Biomed Inc. Top agencies HHS (Department of Health and Human Services)	$653,000	0.1%	Rank history: not on the FY2021–FY2023 lists and #100 in FY2024; up 20 since FY2024.
81	National Medical Services, Inc. Top agencies HHS (Department of Health and Human Services) DOJ (Department of Justice) CSOSA (Court Services and Offender Supervision Agency)	$644,692	0.1%	Rank history: not on the FY2021–FY2024 lists; up 56 since FY2024.
82	Partners Healthcare System Incorporated 2 awardees, including Brigham & Womens Hospital Inc. and Massachusetts General Physicians Organization, Inc. Top agencies VA (Department of Veterans Affairs)	$633,335	0.1%	Rank history: not on the FY2021–FY2022 lists, #97 in FY2023 and #68 in FY2024; down 14 since FY2024.
83	Department of General Services Virginia Top agencies DHA (Defense Health Agency)	$607,200	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
84	Dilligas Corp Top agencies DHA (Defense Health Agency)	$602,325	0.1%	Rank history: not on the FY2021–FY2024 lists; up 39 since FY2024.
85	Amprion, Inc. Top agencies HHS (Department of Health and Human Services)	$598,400	0.1%	Rank history: not on the FY2021–FY2022 lists, #80 in FY2023 and not on the FY2024 list; up 25 since FY2024.
86	Yale Univ Top agencies VA (Department of Veterans Affairs)	$596,707	0.1%	Rank history: not on the FY2021–FY2024 lists; up 85 since FY2024.
87	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–FY2022 lists, #99 in FY2023 and #90 in FY2024; up 3 since FY2024.
88	Incyte Pathology, P.S Top agencies VA (Department of Veterans Affairs)	$585,330	0.1%	Rank history: not on the FY2021–FY2022 lists, #82 in FY2023 and not on the FY2024 list; up 64 since FY2024.
89	Laredo Technical Services, Inc. Top agencies VA (Department of Veterans Affairs)	$563,755	0.1%	Rank history: not on the FY2021–FY2023 lists and #49 in FY2024; down 40 since FY2024.
90	Viralgen Vector Core SL Top agencies HHS (Department of Health and Human Services)	$533,124	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
91	Genscript USA Inc. Top agencies HHS (Department of Health and Human Services)	$532,724	0.1%	Rank history: #71 in FY2021, #72 in FY2022, #51 in FY2023 and not on the FY2024 list; up 62 since FY2024.
92	DMS Health Technologies Inc. Through DMS Imaging, Inc. Top agencies HHS (Department of Health and Human Services)	$527,426	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
93	Giamed Alliance JV LLC Top agencies DHA (Defense Health Agency)	$522,669	0.1%	Rank history: not on the FY2021–FY2022 lists, #77 in FY2023 and #97 in FY2024; up 4 since FY2024.
94	The University of Iowa Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$522,524	0.1%	Rank history: not on the FY2021–FY2024 lists; up 47 since FY2024.
95	Medical University Hospital Authority Top agencies VA (Department of Veterans Affairs)	$518,369	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
96	Nephropathology Associates, PLC Top agencies VA (Department of Veterans Affairs)	$513,667	0.1%	Rank history: not on the FY2021–FY2024 lists; up 131 since FY2024.
97	New York University Top agencies VA (Department of Veterans Affairs)	$510,576	0.1%	Rank history: not on the FY2021–FY2024 lists; up 11 since FY2024.
98	Qiagen, LLC Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) DHA (Defense Health Agency)	$509,868	0.1%	Rank history: not on the FY2021–FY2024 lists; up 91 since FY2024.
99	Dhhs State Public Health Lab Top agencies DHA (Defense Health Agency)	$506,880	0.1%	Rank history: not on the FY2021–FY2024 lists; up 3 since FY2024.
100	Chesapeake Toxicology Resources, LLC Top agencies DOT (Department of Transportation)	$506,319	0.1%	Rank history: not on the FY2021–FY2024 lists; up 15 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 $689 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