Top 100 Contractors in PSC 6520: Dental Instruments, Equipment, and Supplies, FY2021

Name: Top 100 Contractors in PSC 6520: Dental Instruments, Equipment, and Supplies, FY2021
Creator: GovTribe

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

The top 10 won 62% of FY2021 PSC 6520 contract dollars

Contract obligations: $47,044,149 Net of deobligations, by contracts coded PSC 6520
Contractors: 180 Parent companies with an obligation
Largest contractor: Katmai Health Services LLC $17.5 million, 31.5% 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	Katmai Health Services LLC Top agencies DOS (Department of State)	$17,520,658	31.5%	Rank history: #1 in FY2022, #2 in FY2023 and not on the FY2024–FY2025 lists; unchanged since FY2020.
2	A-Dec Inc. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) DLA (Defense Logistics Agency)	$3,777,387	6.8%	Rank history: #4 in FY2022, #1 in FY2023, #2 in FY2024 and #1 in FY2025; unchanged since FY2020.
3	Owens & Minor Inc. Through O&M Halyard, Inc. Top agencies DLA (Defense Logistics Agency)	$2,920,741	5.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
4	Henry Schein, Inc. 4 awardees, including ACE Surgical Supply Co., Inc. and North American Rescue, LLC Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs) DLA (Defense Logistics Agency)	$2,163,588	3.9%	Rank history: #5 in FY2022, #5 in FY2023, #3 in FY2024 and not on the FY2025 list; down 1 since FY2020.
5	Fidelis Sustainability Distribution LLC Top agencies VA (Department of Veterans Affairs) Army (Department of the Army)	$2,130,225	3.8%	Rank history: #3 in FY2022, #3 in FY2023, not on the FY2024 list and #3 in FY2025; down 1 since FY2020.
6	Burbank Dental Laboratory, Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$1,810,580	3.3%	Rank history: #7 in FY2022, #15 in FY2023, #8 in FY2024 and #14 in FY2025; down 1 since FY2020.
7	Dentsply Sirona Inc. 7 awardees, including Dentsply North America LLC, Dentsply IH Inc. and Tulsa Dental Products LLC Top agencies VA (Department of Veterans Affairs) Navy (Department of the Navy) HHS (Department of Health and Human Services)	$1,544,386	2.8%	Rank history: #2 in FY2022, #12 in FY2023, #1 in FY2024 and #18 in FY2025; up 2 since FY2020.
8	Cuna Supply LLC Top agencies VA (Department of Veterans Affairs)	$967,343	1.7%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
9	Proalliance Corp Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) DLA (Defense Logistics Agency)	$771,445	1.4%	Rank history: #12 in FY2022, #6 in FY2023, #7 in FY2024 and #2 in FY2025; up 4 since FY2020.
10	AB Martin Services Inc. Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$729,473	1.3%	Rank history: #21 in FY2022, #8 in FY2023, #5 in FY2024 and #16 in FY2025; up 7 since FY2020.
11	Directional Command, LLC Top agencies VA (Department of Veterans Affairs)	$666,720	1.2%	Rank history: #80 in FY2022, #27 in FY2023 and not on the FY2024–FY2025 lists; up 18 since FY2020.
12	Luminex Corporation Through Diasorin Molecular, LLC Top agencies VA (Department of Veterans Affairs)	$593,664	1.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
13	Biomet 3I LLC 3 awardees, including Zimmer US Inc. and Biomet Microfixation, LLC Top agencies DHA (Defense Health Agency) DLA (Defense Logistics Agency)	$542,148	1.0%	Rank history: #13 in FY2022, #48 in FY2023, #57 in FY2024 and #50 in FY2025; up 2 since FY2020.
14	Creative Dental Images Inc. Top agencies VA (Department of Veterans Affairs)	$503,707	0.9%	Rank history: #6 in FY2022, #9 in FY2023, not on the FY2024 list and #9 in FY2025; up 2 since FY2020.
15	Steris Corporation 2 awardees, including Hu-Friedy Mfg. Co., LLC Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force) HHS (Department of Health and Human Services)	$494,249	0.9%	Rank history: #29 in FY2022, #13 in FY2023 and not on the FY2024–FY2025 lists; up 59 since FY2020.
16	Burkhart Dental Supply Co Top agencies HHS (Department of Health and Human Services)	$452,203	0.8%	Rank history: #10 in FY2022, #92 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
17	Oral Arts Laboratory, Inc. Top agencies VA (Department of Veterans Affairs)	$405,512	0.7%	Rank history: not on the FY2022–FY2025 lists; up 1 since FY2020.
18	Unimed Government Services, LLC Top agencies VA (Department of Veterans Affairs)	$375,589	0.7%	Rank history: not on the FY2022 list, #79 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
19	Benco Dental Supply Co. Top agencies HHS (Department of Health and Human Services) DHS (Department of Homeland Security) DOJ (Department of Justice)	$337,916	0.6%	Rank history: #19 in FY2022, #40 in FY2023, #62 in FY2024 and #30 in FY2025; up 34 since FY2020.
20	Ceramic Arts Dental Laboratories, Inc. Top agencies VA (Department of Veterans Affairs)	$334,861	0.6%	Rank history: #27 in FY2022, #21 in FY2023, #18 in FY2024 and #21 in FY2025; up 38 since FY2020.
21	Ziemek Dental Laboratory, Inc. Top agencies VA (Department of Veterans Affairs)	$295,000	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
22	B & B Dental Ceramic Arts, Inc. Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$291,000	0.5%	Rank history: #36 in FY2022, #37 in FY2023, not on the FY2024 list and #78 in FY2025; up 71 since FY2020.
23	Business Enabled Acquisition and Technology, Inc. Top agencies Navy (Department of the Navy)	$290,000	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
24	Danaher Corporation 7 awardees, including Nobel Biocare Usa, LLC, Dental Imaging Technologies Corporation and Kavo Dental Technologies LLC Top agencies DHA (Defense Health Agency) HHS (Department of Health and Human Services) DOJ (Department of Justice)	$288,538	0.5%	Rank history: #63 in FY2022, #19 in FY2023, #46 in FY2024 and #26 in FY2025; up 3 since FY2020.
25	Environmental Disinfection Management, LLC Top agencies VA (Department of Veterans Affairs)	$249,884	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
26	Varico Group LLC Top agencies VA (Department of Veterans Affairs)	$243,134	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
27	Ortho Solutions, LC Top agencies DHA (Defense Health Agency) Navy (Department of the Navy)	$225,980	0.4%	Rank history: #37 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
28	Millennium Dental Technologies, Inc. Top agencies VA (Department of Veterans Affairs)	$221,752	0.4%	Rank history: #50 in FY2022, #39 in FY2023, #42 in FY2024 and not on the FY2025 list; up 2 since FY2020.
29	California Dental Arts, LLC Top agencies VA (Department of Veterans Affairs)	$215,500	0.4%	Rank history: #23 in FY2022, #24 in FY2023, #39 in FY2024 and #59 in FY2025; new, not ranked in FY2020.
30	Darby Dental Supply, LLC Top agencies HHS (Department of Health and Human Services) DOJ (Department of Justice)	$207,842	0.4%	Rank history: not on the FY2022 list, #75 in FY2023 and not on the FY2024–FY2025 lists; up 2 since FY2020.
31	Intelligent Touch Dental Corp Top agencies VA (Department of Veterans Affairs)	$206,430	0.4%	Rank history: not on the FY2022–FY2025 lists; down 24 since FY2020.
32	Idoc Dental Lab, Inc. Top agencies VA (Department of Veterans Affairs)	$202,239	0.4%	Rank history: #34 in FY2022 and not on the FY2023–FY2025 lists; down 20 since FY2020.
33	Lakota Enterprises Inc. Top agencies HHS (Department of Health and Human Services)	$201,780	0.4%	Rank history: #33 in FY2022, #90 in FY2023 and not on the FY2024–FY2025 lists; up 2 since FY2020.
34	James D Moore DDS Professional LLC Top agencies HHS (Department of Health and Human Services)	$200,000	0.4%	Rank history: #32 in FY2022, #66 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
35	Neocis Inc. Top agencies DHA (Defense Health Agency)	$198,500	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
36	Rotech Healthcare Inc. Top agencies VA (Department of Veterans Affairs)	$193,476	0.3%	Rank history: #41 in FY2022 and not on the FY2023–FY2025 lists; up 36 since FY2020.
37	Colcom & Fritz Inc. Top agencies VA (Department of Veterans Affairs)	$190,894	0.3%	Rank history: not on the FY2022–FY2025 lists; up 7 since FY2020.
38	Hokte LLC Top agencies HHS (Department of Health and Human Services)	$184,752	0.3%	Rank history: #11 in FY2022, #11 in FY2023, #6 in FY2024 and #8 in FY2025; up 54 since FY2020.
39	Somer, Inc. Top agencies VA (Department of Veterans Affairs)	$174,643	0.3%	Rank history: #14 in FY2022, #23 in FY2023, #12 in FY2024 and #17 in FY2025; down 28 since FY2020.
40	Trafalgar Business Solutions, LLC Top agencies VA (Department of Veterans Affairs) DLA (Defense Logistics Agency)	$157,582	0.3%	Rank history: #20 in FY2022, #65 in FY2023, #35 in FY2024 and #73 in FY2025; down 21 since FY2020.
41	Cantel Medical Corp. Through Hu-Friedy Mfg. Co., LLC Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs) DLA (Defense Logistics Agency)	$154,137	0.3%	Rank history: not on the FY2022–FY2025 lists; down 4 since FY2020.
42	Mid-America Taping & Reeling Inc. Top agencies VA (Department of Veterans Affairs) Army (Department of the Army) DOJ (Department of Justice)	$149,596	0.3%	Rank history: #84 in FY2022, not on the FY2023 list, #36 in FY2024 and #94 in FY2025; down 32 since FY2020.
43	Carestream Dental LLC Top agencies VA (Department of Veterans Affairs)	$147,963	0.3%	Rank history: #40 in FY2022, #17 in FY2023, #23 in FY2024 and #72 in FY2025; up 56 since FY2020.
44	Karl Leibinger GMBH & Co. KG Through Kls-Martin Limited Partnership Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) USUHS (DOD Uniformed Services University of the Health Sciences)	$138,068	0.2%	Rank history: #17 in FY2022, #25 in FY2023, #72 in FY2024 and not on the FY2025 list; down 2 since FY2020.
45	Trillamed LLC Top agencies Army (Department of the Army)	$124,213	0.2%	Rank history: #24 in FY2022, #16 in FY2023, #45 in FY2024 and not on the FY2025 list; up 34 since FY2020.
46	Miller Dental Laboratory, Inc. Top agencies VA (Department of Veterans Affairs)	$122,925	0.2%	Rank history: not on the FY2022 list, #29 in FY2023 and not on the FY2024–FY2025 lists; up 9 since FY2020.
47	Bio-Medical Devices International, Inc. Top agencies VA (Department of Veterans Affairs)	$114,888	0.2%	Rank history: not on the FY2022–FY2025 lists; up 7 since FY2020.
48	PH Dental Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$114,865	0.2%	Rank history: not on the FY2022–FY2025 lists; up 9 since FY2020.
49	Dental Laboratory Milling Supplies LLC Top agencies Army (Department of the Army)	$96,550	0.2%	Rank history: #87 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
50	Zyris, Inc. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) DLA (Defense Logistics Agency)	$90,922	0.2%	Rank history: not on the FY2022 list, #47 in FY2023, #37 in FY2024 and #42 in FY2025; unchanged since FY2020.
51	Designs for Vision, Inc. Top agencies VA (Department of Veterans Affairs)	$90,474	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
52	Tryco Incorporated Top agencies DHA (Defense Health Agency) USAF (Department of the Air Force)	$87,535	0.2%	Rank history: #55 in FY2022, #78 in FY2023 and not on the FY2024–FY2025 lists; up 15 since FY2020.
53	Peter Brasseler Holdings, Llc. Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs) DLA (Defense Logistics Agency)	$86,289	0.2%	Rank history: #47 in FY2022, #76 in FY2023, #76 in FY2024 and #27 in FY2025; down 10 since FY2020.
54	Dental Laboratory Group Inc. Top agencies DHS (Department of Homeland Security)	$84,581	0.2%	Rank history: #18 in FY2022, #30 in FY2023, #96 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
55	Inventrix Inc. Top agencies VA (Department of Veterans Affairs)	$83,000	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
56	Dental Health Products Incorporated Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs) DOJ (Department of Justice)	$81,335	0.1%	Rank history: #39 in FY2022, #53 in FY2023, #32 in FY2024 and #44 in FY2025; down 34 since FY2020.
57	The Janz Corp Top agencies VA (Department of Veterans Affairs)	$76,628	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
58	Empire Dental Laboratories LLC Top agencies DHA (Defense Health Agency)	$75,000	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
59	Patterson Companies, Inc. 4 awardees, including Patterson Dental Supply, Inc. Top agencies HHS (Department of Health and Human Services) DHS (Department of Homeland Security) DLA (Defense Logistics Agency)	$73,642	0.1%	Rank history: #16 in FY2022, #18 in FY2023, #15 in FY2024 and not on the FY2025 list; up 36 since FY2020.
60	Healthmark Industries Co., Inc. Top agencies HHS (Department of Health and Human Services)	$72,250	0.1%	Rank history: not on the FY2022–FY2025 lists; up 15 since FY2020.
61	Alliant Enterprises, LLC Top agencies VA (Department of Veterans Affairs)	$68,711	0.1%	Rank history: #30 in FY2022, #14 in FY2023, #4 in FY2024 and #39 in FY2025; up 12 since FY2020.
62	Aldevra LLC Top agencies VA (Department of Veterans Affairs)	$67,632	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
63	Airway Technologies LLC Top agencies VA (Department of Veterans Affairs)	$64,847	0.1%	Rank history: #56 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
64	Ultradent Products Inc. Top agencies HHS (Department of Health and Human Services) DLA (Defense Logistics Agency)	$60,445	0.1%	Rank history: #78 in FY2022 and not on the FY2023–FY2025 lists; up 38 since FY2020.
65	SZY Holdings, LLC Top agencies DLA (Defense Logistics Agency)	$57,048	0.1%	Rank history: #67 in FY2022, #59 in FY2023, #68 in FY2024 and #88 in FY2025; down 5 since FY2020.
66	Contemporary Product Solutions, Inc. Top agencies VA (Department of Veterans Affairs)	$56,927	0.1%	Rank history: #9 in FY2022, #4 in FY2023, #11 in FY2024 and #4 in FY2025; down 1 since FY2020.
67	Architechture Solutions LLC Top agencies VA (Department of Veterans Affairs)	$55,939	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
68	Avco Enterprises Inc. Top agencies Army (Department of the Army)	$55,175	0.1%	Rank history: #48 in FY2022, not on the FY2023 list, #73 in FY2024 and #25 in FY2025; new, not ranked in FY2020.
69	Envisiontec Inc. Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$53,271	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
70	Abiomed Inc. Top agencies VA (Department of Veterans Affairs)	$50,251	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
71	Bound Tree Medical LLC Through Permobil Inc. Top agencies VA (Department of Veterans Affairs)	$48,355	0.1%	Rank history: not on the FY2022–FY2025 lists; up 52 since FY2020.
72	After Action Medical and Dental Supply, LLC Top agencies AFRH (Armed Forces Retirement Home) VA (Department of Veterans Affairs)	$45,635	0.1%	Rank history: #8 in FY2022, #80 in FY2023, #78 in FY2024 and not on the FY2025 list; up 32 since FY2020.
73	Hematerra Technologies, LLC Through Champion Medical Technologies, Inc. Top agencies VA (Department of Veterans Affairs)	$45,610	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
74	Boyd Industries, Inc. Top agencies VA (Department of Veterans Affairs)	$42,581	0.1%	Rank history: #98 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
75	Caribbean Dental Products Corp Top agencies VA (Department of Veterans Affairs)	$41,925	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
76	Aseptico, Inc. Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$39,848	0.1%	Rank history: #62 in FY2022, not on the FY2023 list, #19 in FY2024 and #31 in FY2025; down 50 since FY2020.
77	Government of the United States Through Federal Prison Industries, Inc. Top agencies DOJ (Department of Justice)	$39,600	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
78	Avtec Dental LLC Top agencies VA (Department of Veterans Affairs)	$38,724	0.1%	Rank history: #59 in FY2022 and not on the FY2023–FY2025 lists; up 6 since FY2020.
79	Nash Dental Lab, Inc. Top agencies VA (Department of Veterans Affairs)	$38,648	0.1%	Rank history: #79 in FY2022 and not on the FY2023–FY2025 lists; down 65 since FY2020.
80	Conmed Corp Through Linvatec Corporation Top agencies VA (Department of Veterans Affairs) DHS (Department of Homeland Security)	$37,058	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
81	Buffalo Supply Inc. Top agencies HHS (Department of Health and Human Services)	$35,938	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
82	Dove Medical Supply LLC Top agencies USAF (Department of the Air Force)	$35,484	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
83	Friendship Dental Laboratories, LLC Top agencies AFRH (Armed Forces Retirement Home)	$34,989	0.1%	Rank history: not on the FY2022 list, #89 in FY2023, #71 in FY2024 and #75 in FY2025; new, not ranked in FY2020.
84	Invacare Corp Through Medbloc Inc. Top agencies VA (Department of Veterans Affairs)	$34,871	0.1%	Rank history: not on the FY2022–FY2025 lists; up 61 since FY2020.
85	Keres Consulting Inc. Through Nativevet Materiel, LLC Top agencies HHS (Department of Health and Human Services)	$34,036	0.1%	Rank history: #64 in FY2022, #43 in FY2023, #29 in FY2024 and #45 in FY2025; new, not ranked in FY2020.
86	Global Surgical Corporation Top agencies VA (Department of Veterans Affairs) Navy (Department of the Navy)	$33,630	0.1%	Rank history: #43 in FY2022, #69 in FY2023, #54 in FY2024 and not on the FY2025 list; down 50 since FY2020.
87	Aantilia LLC Top agencies VA (Department of Veterans Affairs)	$33,168	0.1%	Rank history: not on the FY2022–FY2023 lists, #33 in FY2024 and #38 in FY2025; new, not ranked in FY2020.
88	Dental Dealer Supplier Inc. Top agencies DOJ (Department of Justice)	$32,525	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
89	BDL Studio & Supply, LLC Top agencies DHA (Defense Health Agency)	$31,795	0.1%	Rank history: not on the FY2022–FY2025 lists; down 66 since FY2020.
90	Practicon Inc. Top agencies HHS (Department of Health and Human Services)	$31,180	0.1%	Rank history: not on the FY2022 list, #100 in FY2023, #70 in FY2024 and not on the FY2025 list; up 60 since FY2020.
91	Avens Development Services, LLC Top agencies AFRH (Armed Forces Retirement Home)	$30,412	0.1%	Rank history: #94 in FY2022, #74 in FY2023, #50 in FY2024 and #68 in FY2025; down 13 since FY2020.
92	Manufacturing System Services, Inc. Top agencies VA (Department of Veterans Affairs)	$29,625	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
93	Hartmann GMBH Top agencies USAF (Department of the Air Force)	$28,882	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
94	Prime Dental Supply Inc. Top agencies Army (Department of the Army)	$28,472	0.1%	Rank history: not on the FY2022 list, #36 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
95	Defense Venture Holdings, LLC Top agencies VA (Department of Veterans Affairs)	$28,358	0.1%	Rank history: not on the FY2022–FY2025 lists; down 8 since FY2020.
96	Apex Integrated Distribution Inc. Top agencies VA (Department of Veterans Affairs)	$28,254	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
97	Scot-Med LLC Top agencies DLA (Defense Logistics Agency)	$27,839	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 68 since FY2020.
98	3Ddex, LLC Top agencies VA (Department of Veterans Affairs)	$25,350	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
99	Midmark Corporation Top agencies USDA (Department of Agriculture)	$24,666	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 1 since FY2020.
100	Proaim Americas, Llc. Top agencies VA (Department of Veterans Affairs)	$24,265	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.

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100 of 180 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 $55.7 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 6520 contractors in FY2021?

1. Katmai Health Services LLC ($17.5M), 2. A-Dec Inc. ($3.78M), 3. Owens & Minor Inc. ($2.92M), 4. Henry Schein, Inc. ($2.16M), 5. Fidelis Sustainability Distribution LLC ($2.13M), 6. Burbank Dental Laboratory, Inc. ($1.81M), 7. Dentsply Sirona Inc. ($1.54M), 8. Cuna Supply LLC ($967K), 9. Proalliance Corp ($771K), 10. AB Martin Services Inc. ($729K).

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