Top 100 Contractors in NAICS 621511: Medical Laboratories, FY2021

Name: Top 100 Contractors in NAICS 621511: Medical Laboratories, FY2021
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2020 – Sep 30, 2021 Code page on GovTribe

The top 10 won 83% of FY2021 NAICS 621511 contract dollars

Contract obligations: $2,633,172,806 Net of deobligations, by contracts coded NAICS 621511
Contractors: 472 Parent companies with an obligation
Largest contractor: Walgreen Co. $899 million, 32.1% of obligations
Data as of: Oct 14, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Walgreen Co. Top agencies HHS (Department of Health and Human Services)	$899,013,416	32.1%	Rank history: #1 in FY2022 and not on the FY2023–FY2025 lists; up 3 since FY2020.
2	Rite Aid Corporation Through Rite Aid Hdqtrs. Corp. Top agencies HHS (Department of Health and Human Services)	$376,079,968	13.4%	Rank history: #5 in FY2022, #14 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
3	E3Health Solutions, LLC Top agencies HHS (Department of Health and Human Services)	$375,405,960	13.4%	Rank history: #7 in FY2022 and not on the FY2023–FY2025 lists; down 2 since FY2020.
4	Laboratory Corporation of America Holdings 11 awardees, including Laboratory Corporation of America, Monogram Biosciences, Inc. and Esoterix Genetic Laboratories LLC Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$206,319,656	7.4%	Rank history: #3 in FY2022, #4 in FY2023, #51 in FY2024 and #35 in FY2025; up 1 since FY2020.
5	Quest Diagnostics Incorporated 11 awardees, including Quest Diagnostics Nichols Institute, Quest Diagnostics Clinical Laboratories, Inc. and Ameripath Inc. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) DOJ (Department of Justice)	$166,937,253	6.0%	Rank history: #4 in FY2022, #1 in FY2023, #2 in FY2024 and #2 in FY2025; down 3 since FY2020.
6	Hologic, Inc. 2 awardees, including Hologic Sales and Service, LLC Top agencies USAF (Department of the Air Force) VA (Department of Veterans Affairs)	$119,655,005	4.3%	Rank history: not on the FY2022–FY2025 lists; up 11 since FY2020.
7	CVS Health Corporation Through Minuteclinic, L.L.C. Top agencies HHS (Department of Health and Human Services) EOP (Executive Office of the President)	$70,925,451	2.5%	Rank history: #2 in FY2022, #19 in FY2023 and not on the FY2024–FY2025 lists; unchanged since FY2020.
8	Aegis Sciences Corporation 2 awardees Top agencies HHS (Department of Health and Human Services)	$44,824,646	1.6%	Rank history: #12 in FY2022 and not on the FY2023–FY2025 lists; up 12 since FY2020.
9	The Broad Institute, Inc. 2 awardees Top agencies HHS (Department of Health and Human Services)	$42,154,919	1.5%	Rank history: not on the FY2022–FY2025 lists; up 24 since FY2020.
10	Fulgent Genetics, Inc. Through Fulgent Therapeutics LLC Top agencies HHS (Department of Health and Human Services) DHS (Department of Homeland Security)	$33,178,837	1.2%	Rank history: #19 in FY2022, #26 in FY2023, #9 in FY2024 and #9 in FY2025; up 21 since FY2020.
11	Wellness Coaches USA LLC Top agencies DHS (Department of Homeland Security)	$23,135,080	0.8%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
12	Center for Disease Detection, LLC Top agencies Navy (Department of the Navy) Army (Department of the Army)	$21,825,078	0.8%	Rank history: not on the FY2022–FY2025 lists; down 1 since FY2020.
13	Roche Holding AG Through Foundation Medicine, Inc. Top agencies VA (Department of Veterans Affairs)	$21,583,687	0.8%	Rank history: #9 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
14	Laboratory Corporation of America 2 awardees Top agencies HHS (Department of Health and Human Services) DHA (Defense Health Agency) USAF (Department of the Air Force)	$18,251,920	0.7%	Rank history: #8 in FY2022, #2 in FY2023, #1 in FY2024 and #1 in FY2025; down 6 since FY2020.
15	Helix Opco LLC Top agencies HHS (Department of Health and Human Services)	$15,585,290	0.6%	Rank history: #6 in FY2022, #3 in FY2023 and not on the FY2024–FY2025 lists; down 6 since FY2020.
16	Loyal Source Government Services LLC Top agencies USAF (Department of the Air Force)	$10,969,251	0.4%	Rank history: #14 in FY2022, #9 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
17	Miraca Holdings Inc. Through Srl, Inc. Top agencies USAF (Department of the Air Force) DHA (Defense Health Agency)	$10,523,830	0.4%	Rank history: #56 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
18	Genbody Inc. Top agencies HHS (Department of Health and Human Services)	$10,295,000	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
19	Mayo Clinic 2 awardees, including Mayo Collaborative Services, Inc. Top agencies DHA (Defense Health Agency) HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$9,953,231	0.4%	Rank history: #20 in FY2022, #11 in FY2023, #13 in FY2024 and not on the FY2025 list; up 17 since FY2020.
20	Exact Sciences Corporation 2 awardees, including Genomic Health, Inc. Top agencies VA (Department of Veterans Affairs) Army (Department of the Army) DHA (Defense Health Agency)	$8,109,385	0.3%	Rank history: #47 in FY2022, #20 in FY2023, #21 in FY2024 and #23 in FY2025; up 23 since FY2020.
21	Opko Health, Inc. 2 awardees, including Bioreference Health LLC and Genedx, LLC Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$7,471,201	0.3%	Rank history: not on the FY2022–FY2025 lists; up 24 since FY2020.
22	Pathologists BIO Medical Lab 2 awardees, including Associated Pathologists, LLC and Pathologists Bio-Medical Laboratories, PLLC Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$7,313,625	0.3%	Rank history: not on the FY2022–FY2025 lists; down 3 since FY2020.
23	University of Utah 2 awardees, including Arup Laboratories Inc. Top agencies VA (Department of Veterans Affairs) Army (Department of the Army) DHA (Defense Health Agency)	$7,290,319	0.3%	Rank history: #16 in FY2022, #10 in FY2023, #36 in FY2024 and not on the FY2025 list; up 2 since FY2020.
24	The Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc. Top agencies Army (Department of the Army)	$6,783,816	0.2%	Rank history: #15 in FY2022, #8 in FY2023, #8 in FY2024 and #5 in FY2025; down 9 since FY2020.
25	Seoul Clinical Laboratories Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$6,215,052	0.2%	Rank history: #24 in FY2022 and not on the FY2023–FY2025 lists; down 3 since FY2020.
26	Xtrava, Inc. Top agencies HHS (Department of Health and Human Services)	$6,207,000	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
27	MCI Diagnostic Center LLC Top agencies DOL (Department of Labor) Army (Department of the Army) USAF (Department of the Air Force)	$6,188,258	0.2%	Rank history: #18 in FY2022 and not on the FY2023–FY2025 lists; up 12 since FY2020.
28	Banner Health Through Sonora Quest Laboratories LLC Top agencies HHS (Department of Health and Human Services)	$5,547,119	0.2%	Rank history: #35 in FY2022, #22 in FY2023 and not on the FY2024–FY2025 lists; up 2 since FY2020.
29	Abbott Laboratories 6 awardees, including Pembrooke Occupational Health, Inc., Alere Toxicology Services, Inc. and Redwood Toxicology Laboratory, Inc. Top agencies OSD (Office of the Secretary of Defense) DOI (Department of the Interior) DOJ (Department of Justice)	$5,464,359	0.2%	Rank history: #17 in FY2022, #12 in FY2023 and not on the FY2024–FY2025 lists; down 11 since FY2020.
30	Oregon Health & Science University Top agencies VA (Department of Veterans Affairs)	$5,366,469	0.2%	Rank history: #44 in FY2022, #25 in FY2023, #20 in FY2024 and #18 in FY2025; up 10 since FY2020.
31	Bml, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) Army (Department of the Army)	$5,246,170	0.2%	Rank history: #49 in FY2022, not on the FY2023–FY2024 lists and #90 in FY2025; down 3 since FY2020.
32	Acadian Ambulance Service Inc. Top agencies DHS (Department of Homeland Security)	$4,106,211	0.1%	Rank history: #26 in FY2022 and not on the FY2023–FY2025 lists; up 65 since FY2020.
33	Northern Plains Laboratory LLC Top agencies HHS (Department of Health and Human Services) Army (Department of the Army)	$3,664,121	0.1%	Rank history: #25 in FY2022, #15 in FY2023, #14 in FY2024 and #13 in FY2025; up 5 since FY2020.
34	Maxim Biomedical, Inc. Top agencies HHS (Department of Health and Human Services)	$3,153,450	0.1%	Rank history: not on the FY2022–FY2025 lists; up 12 since FY2020.
35	Danaher Corporation 4 awardees, including Cepheid, Beckman Coulter Gesellschaft MIT Beschraenkter Haftung and Beckman Coulter, Inc. Top agencies DHS (Department of Homeland Security) Army (Department of the Army) Navy (Department of the Navy)	$3,096,230	0.1%	Rank history: #58 in FY2022, #29 in FY2023, #35 in FY2024 and #40 in FY2025; up 18 since FY2020.
36	ST. John Health System, Inc. Through Regional Medical Laboratory, Inc. Top agencies HHS (Department of Health and Human Services)	$2,638,280	0.1%	Rank history: #31 in FY2022, #89 in FY2023 and not on the FY2024–FY2025 lists; up 12 since FY2020.
37	Bioiq, Inc. Top agencies Commerce (Department of Commerce)	$2,446,523	0.1%	Rank history: not on the FY2022–FY2025 lists; up 110 since FY2020.
38	Preventiongenetics LLC Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$2,365,625	0.1%	Rank history: #59 in FY2022, #27 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
39	University of Washington 2 awardees Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$2,137,323	0.1%	Rank history: #27 in FY2022 and not on the FY2023–FY2025 lists; up 25 since FY2020.
40	State of California Controllers Office 9 awardees, including California Department of Public Health, Ucla Department of Pathology & Laboratory Medicine and The Regents of the University of California. San Francisco Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs)	$2,012,869	0.1%	Rank history: #32 in FY2022, #35 in FY2023, #34 in FY2024 and not on the FY2025 list; up 20 since FY2020.
41	University of Pittsburgh Medical Center 2 awardees, including Upmc Presbyterian Shadyside Top agencies VA (Department of Veterans Affairs)	$1,997,130	0.1%	Rank history: #38 in FY2022, #36 in FY2023 and not on the FY2024–FY2025 lists; up 59 since FY2020.
42	The Leland Stanford Junior University 2 awardees, including Stanford Hospital & Clinics Top agencies VA (Department of Veterans Affairs)	$1,926,622	0.1%	Rank history: #39 in FY2022, #88 in FY2023, #31 in FY2024 and not on the FY2025 list; unchanged since FY2020.
43	Biobridge Global Through Qualtex Laboratories Top agencies Army (Department of the Army)	$1,578,020	0.1%	Rank history: #43 in FY2022, #31 in FY2023 and not on the FY2024–FY2025 lists; up 6 since FY2020.
44	Bloodworks Top agencies VA (Department of Veterans Affairs) Army (Department of the Army)	$1,562,321	0.1%	Rank history: #64 in FY2022, #65 in FY2023, #67 in FY2024 and #26 in FY2025; up 23 since FY2020.
45	Genomedx Biosciences Corp. Through Veracyte Labs SD Corporation Top agencies VA (Department of Veterans Affairs)	$1,499,308	0.1%	Rank history: not on the FY2022 list, #52 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
46	Creative Testing Solutions Top agencies Army (Department of the Army) Navy (Department of the Navy) DHA (Defense Health Agency)	$1,491,320	0.1%	Rank history: #23 in FY2022, #34 in FY2023, #22 in FY2024 and #17 in FY2025; down 12 since FY2020.
47	The University of Alabama System Through University of Alabama At Birmingham Top agencies VA (Department of Veterans Affairs)	$1,394,550	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 48 since FY2020.
48	Sophia Genetics SA Top agencies USAF (Department of the Air Force) HHS (Department of Health and Human Services)	$1,332,782	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 64 since FY2020.
49	Appddictionstudio Limited Liability Company Top agencies USAF (Department of the Air Force)	$1,273,190	<0.1%	Rank history: #46 in FY2022, #32 in FY2023 and not on the FY2024–FY2025 lists; up 7 since FY2020.
50	Neogenomics Laboratories, Inc. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$1,232,819	<0.1%	Rank history: #55 in FY2022, #18 in FY2023 and not on the FY2024–FY2025 lists; up 1 since FY2020.
51	Hennepin County Through Hennepin Healthcare System Inc. Top agencies VA (Department of Veterans Affairs)	$1,220,297	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 7 since FY2020.
52	Somalogic Operating Co., Inc. Top agencies HHS (Department of Health and Human Services)	$1,168,000	<0.1%	Rank history: #76 in FY2022, #45 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
53	Invitae Corporation Top agencies VA (Department of Veterans Affairs)	$1,162,000	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 23 since FY2020.
54	Oklahoma Blood Institute Top agencies VA (Department of Veterans Affairs)	$1,070,470	<0.1%	Rank history: #50 in FY2022, #43 in FY2023 and not on the FY2024–FY2025 lists; up 3 since FY2020.
55	Sonic Healthcare Limited 4 awardees, including Cytopath Biopsy Lab Inc. and Clinical Laboratories of Hawaii LLP Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$1,060,865	<0.1%	Rank history: #52 in FY2022, #33 in FY2023, #79 in FY2024 and not on the FY2025 list; down 41 since FY2020.
56	Genscript USA Inc. Top agencies HHS (Department of Health and Human Services)	$1,023,871	<0.1%	Rank history: #51 in FY2022, #47 in FY2023, #42 in FY2024 and #45 in FY2025; new, not ranked in FY2020.
57	Bestica, Inc. Top agencies USAF (Department of the Air Force)	$1,019,210	<0.1%	Rank history: #54 in FY2022, #41 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
58	Dt-Trak Consulting, Inc. Top agencies HHS (Department of Health and Human Services)	$1,012,731	<0.1%	Rank history: #61 in FY2022 and not on the FY2023–FY2025 lists; up 78 since FY2020.
59	Cardionet Inc. 2 awardees, including Lifewatch Services Inc. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$998,544	<0.1%	Rank history: not on the FY2022 list, #44 in FY2023 and not on the FY2024–FY2025 lists; up 46 since FY2020.
60	Hjartavernd SES Top agencies HHS (Department of Health and Human Services)	$983,660	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 119 since FY2020.
61	Vanderbelt University Medical Center Through Vanderbilt University Medical Center Top agencies VA (Department of Veterans Affairs)	$959,859	<0.1%	Rank history: #45 in FY2022, #37 in FY2023, #48 in FY2024 and not on the FY2025 list; up 83 since FY2020.
62	Vitalant Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$839,074	<0.1%	Rank history: #65 in FY2022, #61 in FY2023, not on the FY2024 list and #22 in FY2025; up 11 since FY2020.
63	The Trustees of Columbia University In the City of New York Top agencies VA (Department of Veterans Affairs)	$792,200	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 98 since FY2020.
64	Florida Family Laboratory, Inc. Top agencies Commerce (Department of Commerce)	$764,595	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 56 since FY2020.
65	Winergy LLC Top agencies VA (Department of Veterans Affairs)	$719,104	<0.1%	Rank history: #74 in FY2022, #54 in FY2023 and not on the FY2024–FY2025 lists; up 10 since FY2020.
66	Compagnie Merieux Alliance 4 awardees, including Biofire Defense LLC, Biomerieux Inc. and Biotheranostics Inc. Top agencies DOS (Department of State) Navy (Department of the Navy) USAF (Department of the Air Force)	$702,182	<0.1%	Rank history: #91 in FY2022 and not on the FY2023–FY2025 lists; up 23 since FY2020.
67	Trinity Health Corporation Through Loyola University Health System Top agencies VA (Department of Veterans Affairs)	$671,608	<0.1%	Rank history: not on the FY2022 list, #59 in FY2023, #53 in FY2024 and not on the FY2025 list; up 57 since FY2020.
68	The American National Red Cross 2 awardees Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force) HHS (Department of Health and Human Services)	$658,929	<0.1%	Rank history: #66 in FY2022, #60 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
69	Mayo Collaborative Services, Inc. Top agencies HHS (Department of Health and Human Services)	$650,000	<0.1%	Rank history: not on the FY2022–FY2023 lists, #12 in FY2024 and #11 in FY2025; down 28 since FY2020.
70	Regents of the University of Michigan Top agencies VA (Department of Veterans Affairs)	$628,513	<0.1%	Rank history: #92 in FY2022, #53 in FY2023, #43 in FY2024 and #53 in FY2025; up 8 since FY2020.
71	Recoverytrek LLC Top agencies Commerce (Department of Commerce)	$553,411	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
72	The Blood Center Top agencies USAF (Department of the Air Force)	$541,420	<0.1%	Rank history: #90 in FY2022 and not on the FY2023–FY2025 lists; up 20 since FY2020.
73	JLS Medical Products Group, L.L.C. Top agencies VA (Department of Veterans Affairs)	$533,146	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 28 since FY2020.
74	Virginia Polytechnic Institute & State University Through Department of General Services Virginia Top agencies DHA (Defense Health Agency)	$499,560	<0.1%	Rank history: #87 in FY2022, #77 in FY2023, #55 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
75	Macrogen, Inc. Through Psomagen Inc. Top agencies HHS (Department of Health and Human Services)	$485,823	<0.1%	Rank history: #77 in FY2022, #16 in FY2023 and not on the FY2024–FY2025 lists; up 269 since FY2020.
76	Arts-Way Manufacturing Co. Inc. Through Art's Way Scientific, Inc. Top agencies VA (Department of Veterans Affairs)	$481,789	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
77	Dialysis Clinic, Inc. Top agencies VA (Department of Veterans Affairs)	$478,083	<0.1%	Rank history: #94 in FY2022, #87 in FY2023, #83 in FY2024 and not on the FY2025 list; down 3 since FY2020.
78	Siemens Aktiengesellschaft Through Siemens Healthcare Diagnostics Inc. Top agencies Army (Department of the Army) HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$456,649	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 32 since FY2020.
79	Elston Frost Professional Association the Geib Top agencies VA (Department of Veterans Affairs)	$453,492	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 121 since FY2020.
80	Regents of the University of Minnesota Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$452,292	<0.1%	Rank history: #75 in FY2022 and not on the FY2023–FY2025 lists; up 220 since FY2020.
81	Brigham & Womens Hospital Inc 3 awardees, including Massachusetts General Physicians Organization, Inc. and The General Hospital Corporation Top agencies VA (Department of Veterans Affairs)	$446,754	<0.1%	Rank history: #69 in FY2022, #39 in FY2023, #47 in FY2024 and #67 in FY2025; new, not ranked in FY2020.
82	American Veteran Contracting Solutions LLC Top agencies VA (Department of Veterans Affairs)	$444,000	<0.1%	Rank history: #83 in FY2022, #79 in FY2023, #75 in FY2024 and #77 in FY2025; up 20 since FY2020.
83	Bexar County Hospital District Top agencies VA (Department of Veterans Affairs)	$441,297	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 158 since FY2020.
84	Hematologics Inc. Top agencies VA (Department of Veterans Affairs)	$440,408	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 6 since FY2020.
85	Quality Associates Inc. 2 awardees, including Ambry Genetics Corporation and Invicro LLC Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$438,222	<0.1%	Rank history: not on the FY2022–FY2023 lists, #78 in FY2024 and not on the FY2025 list; up 134 since FY2020.
86	Peninsula Histopathology Laboratory Inc. Top agencies VA (Department of Veterans Affairs)	$436,424	<0.1%	Rank history: #71 in FY2022, #48 in FY2023, #71 in FY2024 and #68 in FY2025; up 13 since FY2020.
87	South Central Pathology Lab Pa Top agencies VA (Department of Veterans Affairs)	$435,057	<0.1%	Rank history: #63 in FY2022, #76 in FY2023, #70 in FY2024 and #48 in FY2025; up 17 since FY2020.
88	University Hospitals Health System Inc. Through University Hospitals Cleveland Medical Center Top agencies VA (Department of Veterans Affairs)	$425,245	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
89	Wisconsin Diagnostic Laboratories LLC Top agencies VA (Department of Veterans Affairs)	$409,158	<0.1%	Rank history: not on the FY2022 list, #70 in FY2023, #80 in FY2024 and not on the FY2025 list; down 42 since FY2020.
90	Broad Clinical Laboratories, LLC Top agencies VA (Department of Veterans Affairs)	$400,000	<0.1%	Rank history: not on the FY2022–FY2023 lists, #98 in FY2024 and not on the FY2025 list; up 124 since FY2020.
91	Innomics Inc. Top agencies HHS (Department of Health and Human Services)	$372,290	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
92	Dartmouth-Hitchcock Health Through Mary Hitchcock Memorial Hospital Top agencies VA (Department of Veterans Affairs)	$365,216	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
93	Becton, Dickinson and Co 4 awardees, including Becton, Dickinson Italia S.P.A. Top agencies HHS (Department of Health and Human Services) Army (Department of the Army) VA (Department of Veterans Affairs)	$361,617	<0.1%	Rank history: #78 in FY2022, #99 in FY2023 and not on the FY2024–FY2025 lists; down 83 since FY2020.
94	Queen'S Health Systems the Through Diagnostic Laboratory Services, Inc. Top agencies HHS (Department of Health and Human Services)	$356,059	<0.1%	Rank history: #80 in FY2022, #57 in FY2023 and not on the FY2024–FY2025 lists; down 12 since FY2020.
95	Indiana University Health, Inc. Top agencies VA (Department of Veterans Affairs)	$352,339	<0.1%	Rank history: #97 in FY2022, #91 in FY2023, #77 in FY2024 and #80 in FY2025; up 18 since FY2020.
96	Foundation Health LLC Through Fairbanks Memorial Hospital, LLC Top agencies Army (Department of the Army)	$345,893	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 45 since FY2020.
97	360 Health Plan, Inc. Top agencies Navy (Department of the Navy)	$344,677	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
98	Summit Pathology Top agencies VA (Department of Veterans Affairs)	$336,742	<0.1%	Rank history: not on the FY2022–FY2023 lists, #95 in FY2024 and #87 in FY2025; up 13 since FY2020.
99	The Wong Group LLC Atlanta Top agencies VA (Department of Veterans Affairs)	$334,775	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 15 since FY2020.
100	Virginia Commonwealth University Health System Authority Top agencies VA (Department of Veterans Affairs)	$327,547	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.

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100 of 472 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 $2.8 billion 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.
Fiscal year 2021 ran Oct 1, 2020 – Sep 30, 2021. 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 FY2020. "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 FY2020 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

Who were the top 10 NAICS 621511 contractors in FY2021?

1. Walgreen Co. ($899M), 2. Rite Aid Corporation ($376M), 3. E3Health Solutions, LLC ($375M), 4. Laboratory Corporation of America Holdings ($206M), 5. Quest Diagnostics Incorporated ($167M), 6. Hologic, Inc. ($120M), 7. CVS Health Corporation ($70.9M), 8. Aegis Sciences Corporation ($44.8M), 9. The Broad Institute, Inc. ($42.2M), 10. Fulgent Genetics, Inc. ($33.2M).

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