Top 100 Contractors in PSC Q515: Pathology Services, FY2021

Name: Top 100 Contractors in PSC Q515: Pathology Services, FY2021
Creator: GovTribe

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

The top 10 won 61% of FY2021 PSC Q515 contract dollars

Contract obligations: $56,963,180 Net of deobligations, by contracts coded PSC Q515
Contractors: 108 Parent companies with an obligation
Largest contractor: Ansible Government Solutions LLC $13 million, 20.8% 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	Ansible Government Solutions LLC Top agencies VA (Department of Veterans Affairs)	$12,998,978	20.8%	Rank history: #12 in FY2022, #1 in FY2023, #1 in FY2024 and #1 in FY2025; up 95 since FY2020.
2	The Tatitlek Corporation Through Tatitlek Federal Services LLC Top agencies Army (Department of the Army)	$5,429,371	8.7%	Rank history: #2 in FY2022 and not on the FY2023–FY2025 lists; unchanged since FY2020.
3	Toxicologic Pathology Associates Inc. Top agencies HHS (Department of Health and Human Services)	$4,366,075	7.0%	Rank history: #1 in FY2022, #2 in FY2023, #2 in FY2024 and #2 in FY2025; down 2 since FY2020.
4	Bloodworks Top agencies VA (Department of Veterans Affairs)	$3,670,037	5.9%	Rank history: not on the FY2022–FY2023 lists, #4 in FY2024 and #3 in FY2025; new, not ranked in FY2020.
5	Mayo Clinic Through Mayo Collaborative Services, Inc. Top agencies VA (Department of Veterans Affairs)	$2,310,710	3.7%	Rank history: #17 in FY2022, #48 in FY2023, #18 in FY2024 and not on the FY2025 list; up 6 since FY2020.
6	Ut Medical Group, Inc. Top agencies VA (Department of Veterans Affairs)	$2,160,019	3.5%	Rank history: #4 in FY2022, #6 in FY2023, #15 in FY2024 and #5 in FY2025; down 3 since FY2020.
7	Laboratory Corporation of America Holdings 4 awardees, including Laboratory Corporation of America and Esoterix Genetic Laboratories LLC Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$2,089,664	3.4%	Rank history: #10 in FY2022, #15 in FY2023, #47 in FY2024 and not on the FY2025 list; down 3 since FY2020.
8	The American National Red Cross 2 awardees Top agencies VA (Department of Veterans Affairs)	$1,741,782	2.8%	Rank history: #5 in FY2022, #20 in FY2023, #5 in FY2024 and #11 in FY2025; down 2 since FY2020.
9	Oneblood, Inc. Top agencies VA (Department of Veterans Affairs)	$1,644,134	2.6%	Rank history: #7 in FY2022, #18 in FY2023 and not on the FY2024–FY2025 lists; down 2 since FY2020.
10	Decypher Technologies Ltd Top agencies Army (Department of the Army)	$1,561,728	2.5%	Rank history: #8 in FY2022, #7 in FY2023, #7 in FY2024 and #8 in FY2025; down 2 since FY2020.
11	U.s. Federal Solutions, Inc. Top agencies DHA (Defense Health Agency)	$1,345,576	2.2%	Rank history: #6 in FY2022, #4 in FY2023, #6 in FY2024 and #25 in FY2025; new, not ranked in FY2020.
12	Ibex It Business Experts LLC Top agencies DHA (Defense Health Agency)	$1,336,368	2.1%	Rank history: #11 in FY2022, #5 in FY2023, #8 in FY2024 and #6 in FY2025; down 2 since FY2020.
13	Hennepin County Through Hennepin Healthcare System Inc. Top agencies VA (Department of Veterans Affairs)	$1,220,297	2.0%	Rank history: #34 in FY2022 and not on the FY2023–FY2025 lists; unchanged since FY2020.
14	Physicians Laboratory, P.C. Top agencies VA (Department of Veterans Affairs)	$1,209,415	1.9%	Rank history: #9 in FY2022, #11 in FY2023, #13 in FY2024 and #13 in FY2025; down 2 since FY2020.
15	The Arora Group, Inc. Top agencies Army (Department of the Army)	$1,168,760	1.9%	Rank history: #13 in FY2022, #12 in FY2023, #19 in FY2024 and not on the FY2025 list; down 6 since FY2020.
16	Consilium Staffing, LLC Top agencies VA (Department of Veterans Affairs)	$970,180	1.6%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
17	Rividium Inc. Top agencies DHA (Defense Health Agency)	$885,570	1.4%	Rank history: not on the FY2022–FY2025 lists; down 12 since FY2020.
18	Spectrum Services Group Inc. Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$669,134	1.1%	Rank history: #26 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
19	Loyal Source Government Services LLC Top agencies VA (Department of Veterans Affairs)	$655,947	1.1%	Rank history: not on the FY2022–FY2025 lists; down 4 since FY2020.
20	Iowa Pathology Associates, P.C. Top agencies VA (Department of Veterans Affairs)	$605,167	1.0%	Rank history: #18 in FY2022, #8 in FY2023, #27 in FY2024 and #16 in FY2025; down 2 since FY2020.
21	Vetstaff LLC Top agencies VA (Department of Veterans Affairs)	$529,888	0.8%	Rank history: #30 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
22	Danaher Corporation 2 awardees, including Beckman Coulter, Inc. and Cepheid Top agencies VA (Department of Veterans Affairs)	$508,760	0.8%	Rank history: not on the FY2022–FY2025 lists; up 29 since FY2020.
23	Ghost RX Inc. Top agencies VA (Department of Veterans Affairs)	$453,357	0.7%	Rank history: #31 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
24	Sanford Clinic Top agencies VA (Department of Veterans Affairs)	$445,160	0.7%	Rank history: #61 in FY2022 and not on the FY2023–FY2025 lists; up 7 since FY2020.
25	Lifesouth Community Blood Centers Inc. Top agencies VA (Department of Veterans Affairs)	$442,163	0.7%	Rank history: #41 in FY2022, #29 in FY2023 and not on the FY2024–FY2025 lists; down 3 since FY2020.
26	South Central Pathology Lab Pa Top agencies VA (Department of Veterans Affairs)	$435,057	0.7%	Rank history: #15 in FY2022, #22 in FY2023, #20 in FY2024 and #18 in FY2025; down 6 since FY2020.
27	Amarillo Pathology Group L.L.P. Top agencies VA (Department of Veterans Affairs)	$408,728	0.7%	Rank history: #27 in FY2022, #26 in FY2023, #23 in FY2024 and #26 in FY2025; down 4 since FY2020.
28	Brigham & Womens Hospital Inc Top agencies VA (Department of Veterans Affairs)	$406,879	0.7%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
29	National Disease Research Interchange Top agencies VA (Department of Veterans Affairs)	$375,680	0.6%	Rank history: #28 in FY2022, #25 in FY2023, #30 in FY2024 and #37 in FY2025; up 4 since FY2020.
30	Colonial Federal Healthcare, LLC Top agencies VA (Department of Veterans Affairs)	$361,046	0.6%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
31	The Wong Group LLC Atlanta Top agencies VA (Department of Veterans Affairs)	$334,775	0.5%	Rank history: not on the FY2022 list, #43 in FY2023, #46 in FY2024 and #47 in FY2025; down 6 since FY2020.
32	University of Wisconsin System Through University of Wisconsin Hospitals and Clinics Authority Top agencies VA (Department of Veterans Affairs)	$313,189	0.5%	Rank history: #16 in FY2022, #10 in FY2023, #9 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
33	The Cleveland Clinic Foundation Top agencies VA (Department of Veterans Affairs)	$260,000	0.4%	Rank history: #38 in FY2022, #19 in FY2023, #10 in FY2024 and #35 in FY2025; down 6 since FY2020.
34	Exact Sciences Corporation 2 awardees, including Genomic Health, Inc. Top agencies VA (Department of Veterans Affairs) Army (Department of the Army)	$249,060	0.4%	Rank history: #57 in FY2022, #44 in FY2023 and not on the FY2024–FY2025 lists; up 16 since FY2020.
35	The University of Iowa Top agencies VA (Department of Veterans Affairs)	$244,349	0.4%	Rank history: #37 in FY2022, #33 in FY2023, #44 in FY2024 and #88 in FY2025; up 57 since FY2020.
36	The Pathology Group, P.C Top agencies VA (Department of Veterans Affairs)	$237,777	0.4%	Rank history: #35 in FY2022, #76 in FY2023, #28 in FY2024 and #36 in FY2025; down 10 since FY2020.
37	University of Minnesota Physicians Top agencies VA (Department of Veterans Affairs)	$227,114	0.4%	Rank history: #36 in FY2022, #30 in FY2023, #38 in FY2024 and not on the FY2025 list; down 9 since FY2020.
38	Distinctive Home Care, Inc. Top agencies DHA (Defense Health Agency)	$216,942	0.3%	Rank history: not on the FY2022–FY2025 lists; down 17 since FY2020.
39	Roche Holding AG Through Roche Diagnostics Corporation Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs)	$201,184	0.3%	Rank history: #76 in FY2022 and not on the FY2023–FY2025 lists; up 37 since FY2020.
40	Global Dynamics LLC Top agencies VA (Department of Veterans Affairs)	$200,533	0.3%	Rank history: #21 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
41	The University of Alabama System Through University of Alabama At Birmingham Top agencies VA (Department of Veterans Affairs)	$190,000	0.3%	Rank history: #72 in FY2022, #75 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
42	State of California Controllers Office 3 awardees, including Ucla Department of Pathology & Laboratory Medicine and University of California, Davis Top agencies VA (Department of Veterans Affairs)	$172,669	0.3%	Rank history: #46 in FY2022, #39 in FY2023, #34 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
43	Donald L. Mooney Enterprises, LLC Top agencies Army (Department of the Army)	$161,808	0.3%	Rank history: #24 in FY2022, #14 in FY2023, #12 in FY2024 and #15 in FY2025; new, not ranked in FY2020.
44	Millbrook Support Services Inc. Top agencies VA (Department of Veterans Affairs)	$140,400	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
45	Nova Southeastern University, Inc. Top agencies VA (Department of Veterans Affairs)	$126,448	0.2%	Rank history: #48 in FY2022 and not on the FY2023–FY2025 lists; up 2 since FY2020.
46	Incyte Pathology, P.S Top agencies VA (Department of Veterans Affairs)	$118,310	0.2%	Rank history: #69 in FY2022 and not on the FY2023–FY2025 lists; down 2 since FY2020.
47	Government Scientific Source Inc. Top agencies VA (Department of Veterans Affairs)	$112,255	0.2%	Rank history: #32 in FY2022, #35 in FY2023, not on the FY2024 list and #57 in FY2025; down 8 since FY2020.
48	Regents of the University of Michigan Top agencies VA (Department of Veterans Affairs)	$107,849	0.2%	Rank history: #87 in FY2022, #77 in FY2023, #80 in FY2024 and #67 in FY2025; up 53 since FY2020.
49	Glenoaks Pathology Medical Group Inc. Top agencies VA (Department of Veterans Affairs)	$101,920	0.2%	Rank history: #53 in FY2022, #42 in FY2023, #39 in FY2024 and #49 in FY2025; up 4 since FY2020.
50	Dilligas Corp Top agencies Army (Department of the Army)	$92,578	0.1%	Rank history: #80 in FY2022 and not on the FY2023–FY2025 lists; up 13 since FY2020.
51	LSG Educational Services LLC Top agencies DOI (Department of the Interior)	$91,907	0.1%	Rank history: #49 in FY2022, #37 in FY2023, not on the FY2024 list and #75 in FY2025; up 3 since FY2020.
52	Vitalant Top agencies VA (Department of Veterans Affairs)	$90,775	0.1%	Rank history: #51 in FY2022, #46 in FY2023, #53 in FY2024 and #59 in FY2025; new, not ranked in FY2020.
53	Johnson & Johnson Through Ortho-Clinical Diagnostics, Inc. Top agencies VA (Department of Veterans Affairs)	$88,921	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
54	The Rogosin Institute Inc. Top agencies VA (Department of Veterans Affairs)	$79,619	0.1%	Rank history: #42 in FY2022, #36 in FY2023, #37 in FY2024 and #65 in FY2025; down 9 since FY2020.
55	Agilent Technologies, Inc. 2 awardees Top agencies VA (Department of Veterans Affairs)	$75,344	0.1%	Rank history: #50 in FY2022 and not on the FY2023–FY2025 lists; down 7 since FY2020.
56	Histo-Tec Laboratory, Inc. Top agencies VA (Department of Veterans Affairs)	$74,033	0.1%	Rank history: #44 in FY2022, #70 in FY2023, #65 in FY2024 and #42 in FY2025; up 2 since FY2020.
57	EGA Associates, LLC Top agencies VA (Department of Veterans Affairs)	$70,000	0.1%	Rank history: #19 in FY2022, #23 in FY2023 and not on the FY2024–FY2025 lists; down 27 since FY2020.
58	Sanford Federal, Inc. Top agencies VA (Department of Veterans Affairs)	$69,120	0.1%	Rank history: #77 in FY2022, #58 in FY2023 and not on the FY2024–FY2025 lists; up 35 since FY2020.
59	American Association of Blood Banks, Inc. Top agencies Army (Department of the Army)	$60,413	0.1%	Rank history: #39 in FY2022, #28 in FY2023, #36 in FY2024 and #38 in FY2025; down 27 since FY2020.
60	Vesa Health & Technology Inc. Top agencies VA (Department of Veterans Affairs)	$59,516	0.1%	Rank history: not on the FY2022–FY2025 lists; down 46 since FY2020.
61	Komplete Systems Integrators, Inc. Top agencies VA (Department of Veterans Affairs)	$58,240	0.1%	Rank history: #55 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
62	Akahi Ingenesis Partners LLC Top agencies USAF (Department of the Air Force)	$54,605	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
63	Pathology Associates Top agencies VA (Department of Veterans Affairs)	$53,036	0.1%	Rank history: not on the FY2022–FY2025 lists; down 46 since FY2020.
64	Charles River Laboratories International Inc. Through Charles River Laboratories, Inc. Top agencies HHS (Department of Health and Human Services)	$51,518	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
65	Anatomic Clinical & Forensic Pathology Top agencies DHA (Defense Health Agency)	$51,200	0.1%	Rank history: #64 in FY2022, #50 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
66	Caredx, Inc. Top agencies VA (Department of Veterans Affairs)	$50,778	0.1%	Rank history: #58 in FY2022, #41 in FY2023, #25 in FY2024 and #46 in FY2025; up 1 since FY2020.
67	Stago International Through Diagnostica Stago Inc. Top agencies VA (Department of Veterans Affairs)	$49,857	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
68	Werfen USA LLC Top agencies VA (Department of Veterans Affairs)	$46,748	0.1%	Rank history: not on the FY2022–FY2025 lists; down 26 since FY2020.
69	Oregon Health & Science University Top agencies VA (Department of Veterans Affairs)	$42,123	0.1%	Rank history: #63 in FY2022, #68 in FY2023, #61 in FY2024 and #63 in FY2025; down 4 since FY2020.
70	Nephropathology Associates, PLC Top agencies VA (Department of Veterans Affairs)	$41,945	0.1%	Rank history: #43 in FY2022, #56 in FY2023, #50 in FY2024 and #48 in FY2025; down 11 since FY2020.
71	Perkinelmer Inc. Through Revvity Omics Inc. Top agencies Army (Department of the Army)	$40,080	0.1%	Rank history: #59 in FY2022, #38 in FY2023, #42 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
72	Cornells Autopsy Service Top agencies VA (Department of Veterans Affairs)	$39,750	0.1%	Rank history: not on the FY2022 list, #59 in FY2023 and not on the FY2024–FY2025 lists; down 4 since FY2020.
73	Siemens Aktiengesellschaft Through Siemens Healthcare Diagnostics Inc. Top agencies Army (Department of the Army)	$39,220	0.1%	Rank history: #81 in FY2022, #79 in FY2023, #87 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
74	Tosoh Corporation Through Tosoh Bioscience, Inc. Top agencies VA (Department of Veterans Affairs)	$37,493	0.1%	Rank history: #66 in FY2022, #45 in FY2023, #57 in FY2024 and not on the FY2025 list; up 5 since FY2020.
75	University of California, Davis Top agencies VA (Department of Veterans Affairs)	$35,640	0.1%	Rank history: not on the FY2022–FY2025 lists; down 34 since FY2020.
76	Kentucky Medical Services Foundation, Inc. Top agencies VA (Department of Veterans Affairs)	$31,314	0.1%	Rank history: #60 in FY2022, #81 in FY2023, #62 in FY2024 and #66 in FY2025; up 4 since FY2020.
77	Scott & White Memorial Hospitl Through Scott & White Memorial Hospital Top agencies VA (Department of Veterans Affairs)	$30,938	<0.1%	Rank history: #56 in FY2022, #53 in FY2023 and not on the FY2024–FY2025 lists; down 5 since FY2020.
78	The Glocoms Group Inc. Top agencies VA (Department of Veterans Affairs)	$29,900	<0.1%	Rank history: #71 in FY2022, #65 in FY2023, #67 in FY2024 and not on the FY2025 list; down 3 since FY2020.
79	Thermo Electron Corporation Through Fisher Scientific Company L.L.C. Top agencies VA (Department of Veterans Affairs)	$27,431	<0.1%	Rank history: #65 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
80	Stransky, Alan J Top agencies HHS (Department of Health and Human Services)	$24,000	<0.1%	Rank history: #54 in FY2022, #74 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
81	The Johns Hopkins Health System Corporation Top agencies VA (Department of Veterans Affairs)	$23,625	<0.1%	Rank history: #82 in FY2022 and not on the FY2023–FY2025 lists; up 5 since FY2020.
82	Regents Tennessee Board of Through East Tennessee State University Top agencies VA (Department of Veterans Affairs)	$20,683	<0.1%	Rank history: #86 in FY2022, #55 in FY2023, #81 in FY2024 and not on the FY2025 list; down 13 since FY2020.
83	Carahsoft Technology Corp Top agencies VA (Department of Veterans Affairs)	$19,824	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
84	Abbott Laboratories 3 awardees, including Abbott Rapid Diagnostics Informatics, Inc. Top agencies Army (Department of the Army)	$15,310	<0.1%	Rank history: #62 in FY2022, #51 in FY2023 and not on the FY2024–FY2025 lists; up 1 since FY2020.
85	University Hospitals Health System Inc. Through University Hospitals Cleveland Medical Center Top agencies VA (Department of Veterans Affairs)	$15,245	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
86	Mitchell Diener Removal Services, LLC Top agencies VA (Department of Veterans Affairs)	$15,171	<0.1%	Rank history: #74 in FY2022, #61 in FY2023, #68 in FY2024 and #72 in FY2025; up 3 since FY2020.
87	Uyehara-Lock Jane H Top agencies Army (Department of the Army)	$14,976	<0.1%	Rank history: #78 in FY2022, #66 in FY2023, #85 in FY2024 and #86 in FY2025; new, not ranked in FY2020.
88	Medialab Solutions LLC Top agencies DHA (Defense Health Agency)	$13,998	<0.1%	Rank history: #79 in FY2022, #67 in FY2023, #64 in FY2024 and #69 in FY2025; up 3 since FY2020.
89	Quest Diagnostics Incorporated Top agencies USAF (Department of the Air Force)	$12,700	<0.1%	Rank history: #3 in FY2022, #3 in FY2023, #3 in FY2024 and #12 in FY2025; down 54 since FY2020.
90	Georgia State of Through Georgia Bureau of Investigation Top agencies DOJ (Department of Justice)	$12,500	<0.1%	Rank history: #93 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
91	Icahn School of Medicine at Mount Sinai Top agencies VA (Department of Veterans Affairs)	$9,144	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
92	University of Oklahoma Top agencies VA (Department of Veterans Affairs)	$9,000	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
93	Agfa Healthcare Corporation Through Agfa US Corp Top agencies DOJ (Department of Justice)	$8,903	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
94	AU Medical Associates, Inc. Top agencies VA (Department of Veterans Affairs)	$8,848	<0.1%	Rank history: #91 in FY2022 and not on the FY2023–FY2025 lists; up 6 since FY2020.
95	Pearl Transportation Services Top agencies USAF (Department of the Air Force)	$8,227	<0.1%	Rank history: #84 in FY2022, #73 in FY2023, #79 in FY2024 and #80 in FY2025; new, not ranked in FY2020.
96	Western Pathology Consultant Inc. Top agencies VA (Department of Veterans Affairs)	$5,638	<0.1%	Rank history: #83 in FY2022, #63 in FY2023, #71 in FY2024 and #81 in FY2025; up 3 since FY2020.
97	H. Lee Moffitt Cancer Center and Research Institute Hospital, Inc. Top agencies VA (Department of Veterans Affairs)	$5,135	<0.1%	Rank history: #92 in FY2022, #54 in FY2023 and not on the FY2024–FY2025 lists; up 1 since FY2020.
98	Integrated Laboratory Systems, LLC Top agencies HHS (Department of Health and Human Services)	$3,835	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
99	Vanderbelt University Medical Center Through Vanderbilt University Medical Center Top agencies VA (Department of Veterans Affairs)	$2,046	<0.1%	Rank history: #88 in FY2022, #78 in FY2023, #83 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
100	Newberry Pathology Associates Top agencies DOJ (Department of Justice)	$1,100	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.

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100 of 108 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 $62.4 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. 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 PSC Q515 contractors in FY2021?

1. Ansible Government Solutions LLC ($13M), 2. The Tatitlek Corporation ($5.43M), 3. Toxicologic Pathology Associates Inc. ($4.37M), 4. Bloodworks ($3.67M), 5. Mayo Clinic ($2.31M), 6. Ut Medical Group, Inc. ($2.16M), 7. Laboratory Corporation of America Holdings ($2.09M), 8. The American National Red Cross ($1.74M), 9. Oneblood, Inc. ($1.64M), 10. Decypher Technologies Ltd ($1.56M).

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