Top 100 Contractors in PSC 6540: Ophthalmic Instruments, Equipment, and Supplies, FY2021

Name: Top 100 Contractors in PSC 6540: Ophthalmic 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 72% of FY2021 PSC 6540 contract dollars

Contract obligations: $70,463,374 Net of deobligations, by contracts coded PSC 6540
Contractors: 123 Parent companies with an obligation
Largest contractor: PDS Consultants, Inc. $31.7 million, 39.0% 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	PDS Consultants, Inc. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$31,732,373	39.0%	Rank history: #1 in FY2022, #1 in FY2023, #1 in FY2024 and #1 in FY2025; unchanged since FY2020.
2	Melling LLC Top agencies VA (Department of Veterans Affairs) Army (Department of the Army) USAF (Department of the Air Force)	$6,065,335	7.4%	Rank history: #3 in FY2022, #3 in FY2023, #8 in FY2024 and #12 in FY2025; up 7 since FY2020.
3	Superior Optical Labs, Inc. Top agencies VA (Department of Veterans Affairs)	$5,800,529	7.1%	Rank history: #2 in FY2022, #2 in FY2023, #2 in FY2024 and #2 in FY2025; unchanged since FY2020.
4	Proaim Americas, Llc. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$4,679,252	5.7%	Rank history: #4 in FY2022, #4 in FY2023, #7 in FY2024 and #4 in FY2025; up 2 since FY2020.
5	Lombart Brothers Inc. 3 awardees Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$3,351,875	4.1%	Rank history: #5 in FY2022, #8 in FY2023, #6 in FY2024 and #5 in FY2025; up 3 since FY2020.
6	Meisystem Inc. Top agencies VA (Department of Veterans Affairs)	$1,773,548	2.2%	Rank history: #27 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
7	L1 Enterprises Incorporated Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$1,587,025	1.9%	Rank history: #18 in FY2022, #7 in FY2023, #11 in FY2024 and #6 in FY2025; up 9 since FY2020.
8	Corps Medical Supply, LLC Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) Navy (Department of the Navy)	$1,393,345	1.7%	Rank history: #8 in FY2022, #5 in FY2023, #3 in FY2024 and #3 in FY2025; up 13 since FY2020.
9	Corps Biologics LLC Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$1,283,249	1.6%	Rank history: #11 in FY2022, #9 in FY2023, #15 in FY2024 and not on the FY2025 list; down 7 since FY2020.
10	Human Technologies Corp Top agencies DOS (Department of State)	$1,262,764	1.6%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
11	Vision Associates of Rochester, Inc. Top agencies VA (Department of Veterans Affairs) DLA (Defense Logistics Agency)	$737,365	0.9%	Rank history: #9 in FY2022, #11 in FY2023, #12 in FY2024 and not on the FY2025 list; up 2 since FY2020.
12	Bayou Ophthalmic Instruments, Inc. Top agencies VA (Department of Veterans Affairs) Army (Department of the Army)	$722,228	0.9%	Rank history: not on the FY2022–FY2025 lists; up 8 since FY2020.
13	Veterans Healthcare Supply Solutions, Inc. Top agencies VA (Department of Veterans Affairs) Army (Department of the Army)	$697,783	0.9%	Rank history: #24 in FY2022, #15 in FY2023, #14 in FY2024 and #42 in FY2025; down 6 since FY2020.
14	Alcon Vision LLC 2 awardees Top agencies DHA (Defense Health Agency) Army (Department of the Army) VA (Department of Veterans Affairs)	$692,620	0.9%	Rank history: #20 in FY2022, #23 in FY2023 and not on the FY2024–FY2025 lists; up 17 since FY2020.
15	Optics Incorporated Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) DOJ (Department of Justice)	$612,384	0.8%	Rank history: #7 in FY2022, #12 in FY2023, #16 in FY2024 and #28 in FY2025; down 5 since FY2020.
16	Stereo Optical Company Inc. 4 awardees, including Satisloh North America Inc., DAC Vision Incorporated and Optisource International Inc. Top agencies VA (Department of Veterans Affairs) DLA (Defense Logistics Agency) Navy (Department of the Navy)	$603,436	0.7%	Rank history: #10 in FY2022, #21 in FY2023 and not on the FY2024–FY2025 lists; down 1 since FY2020.
17	O R Elder Inc. Top agencies VA (Department of Veterans Affairs) Navy (Department of the Navy) Army (Department of the Army)	$575,307	0.7%	Rank history: #21 in FY2022, #14 in FY2023, #10 in FY2024 and #31 in FY2025; up 1 since FY2020.
18	Johnson & Johnson Through AMO Sales and Service, Inc. Top agencies DHA (Defense Health Agency) HHS (Department of Health and Human Services) USAF (Department of the Air Force)	$521,426	0.6%	Rank history: #28 in FY2022, #20 in FY2023, #41 in FY2024 and not on the FY2025 list; down 13 since FY2020.
19	Bravo, Inc. Top agencies VA (Department of Veterans Affairs)	$434,775	0.5%	Rank history: #15 in FY2022 and not on the FY2023–FY2025 lists; up 40 since FY2020.
20	Oertli Instruments Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$377,396	0.5%	Rank history: not on the FY2022–FY2025 lists; up 14 since FY2020.
21	A & A Optical Company Top agencies VA (Department of Veterans Affairs)	$332,691	0.4%	Rank history: #12 in FY2022, #16 in FY2023, #23 in FY2024 and #11 in FY2025; down 2 since FY2020.
22	AB Martin Services Inc. Top agencies VA (Department of Veterans Affairs) USDA (Department of Agriculture)	$320,168	0.4%	Rank history: #6 in FY2022, #10 in FY2023, #5 in FY2024 and not on the FY2025 list; down 18 since FY2020.
23	Government of the United States 3 awardees, including Federal Prison Industries, Inc. Top agencies DOJ (Department of Justice) Navy (Department of the Navy)	$291,678	0.4%	Rank history: #23 in FY2022, #33 in FY2023, #39 in FY2024 and #24 in FY2025; new, not ranked in FY2020.
24	Ellex Inc. Through Lumibird Medical Inc. Top agencies VA (Department of Veterans Affairs)	$228,862	0.3%	Rank history: #53 in FY2022 and not on the FY2023–FY2025 lists; up 2 since FY2020.
25	Specops Medical Supply, LLC Top agencies VA (Department of Veterans Affairs)	$228,658	0.3%	Rank history: not on the FY2022–FY2023 lists, #71 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
26	Metro Medical Equipment & Supply, Inc. Top agencies VA (Department of Veterans Affairs)	$209,601	0.3%	Rank history: #19 in FY2022, #13 in FY2023, #61 in FY2024 and #15 in FY2025; down 12 since FY2020.
27	Iron Bow Technologies, LLC Top agencies VA (Department of Veterans Affairs)	$194,940	0.2%	Rank history: not on the FY2022–FY2025 lists; up 21 since FY2020.
28	Hart Specialties Inc. Top agencies VA (Department of Veterans Affairs)	$192,346	0.2%	Rank history: #16 in FY2022, #19 in FY2023, #28 in FY2024 and #21 in FY2025; down 5 since FY2020.
29	Hi-Tech Optical, Inc. Top agencies HHS (Department of Health and Human Services) DHA (Defense Health Agency) Navy (Department of the Navy)	$192,001	0.2%	Rank history: #22 in FY2022, #63 in FY2023 and not on the FY2024–FY2025 lists; up 1 since FY2020.
30	Ophthalmic Instruments Inc. Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$188,310	0.2%	Rank history: #91 in FY2022 and not on the FY2023–FY2025 lists; down 19 since FY2020.
31	Visionix USA Inc. Top agencies HHS (Department of Health and Human Services) Army (Department of the Army)	$177,690	0.2%	Rank history: not on the FY2022–FY2023 lists, #55 in FY2024 and not on the FY2025 list; up 60 since FY2020.
32	Capri Optics Inc. Top agencies VA (Department of Veterans Affairs)	$156,561	0.2%	Rank history: #31 in FY2022, #22 in FY2023, #21 in FY2024 and #10 in FY2025; down 4 since FY2020.
33	Lovell Government Services Inc. Top agencies VA (Department of Veterans Affairs)	$151,749	0.2%	Rank history: not on the FY2022–FY2024 lists and #35 in FY2025; new, not ranked in FY2020.
34	Statsource Medical, LLC Top agencies VA (Department of Veterans Affairs)	$147,000	0.2%	Rank history: #64 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
35	Beckman Coulter, Inc. Top agencies VA (Department of Veterans Affairs)	$135,630	0.2%	Rank history: not on the FY2022–FY2024 lists and #45 in FY2025; down 2 since FY2020.
36	William Demants OG Hustru IDA Emilies (MILLAS) Fond - Kaldet 2 awardees, including Diagnostic Group LLC and E3 Diagnostics, Inc. Top agencies VA (Department of Veterans Affairs) Army (Department of the Army)	$131,811	0.2%	Rank history: #13 in FY2022, #85 in FY2023 and not on the FY2024–FY2025 lists; up 57 since FY2020.
37	DGA Medical LLC Top agencies VA (Department of Veterans Affairs)	$124,698	0.2%	Rank history: #73 in FY2022, not on the FY2023 list, #42 in FY2024 and #52 in FY2025; up 59 since FY2020.
38	Randolph Engineering, Inc. Top agencies DLA (Defense Logistics Agency)	$104,962	0.1%	Rank history: #87 in FY2022, #26 in FY2023, #47 in FY2024 and #30 in FY2025; up 17 since FY2020.
39	OD-OS Inc. Top agencies VA (Department of Veterans Affairs)	$100,462	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
40	Lions Medical Eye Bank and Research Center of Eastern Virginia, Inc. Top agencies DHA (Defense Health Agency)	$99,000	0.1%	Rank history: not on the FY2022–FY2024 lists and #32 in FY2025; new, not ranked in FY2020.
41	Alcon Laboratories Inc. Top agencies DHA (Defense Health Agency)	$99,000	0.1%	Rank history: not on the FY2022–FY2025 lists; down 19 since FY2020.
42	Digi International Inc. Top agencies Army (Department of the Army)	$98,542	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
43	The Janz Corp Top agencies VA (Department of Veterans Affairs) DLA (Defense Logistics Agency)	$90,528	0.1%	Rank history: #60 in FY2022, #34 in FY2023, #19 in FY2024 and #16 in FY2025; new, not ranked in FY2020.
44	Armada Optical Services Inc. Top agencies Navy (Department of the Navy)	$86,799	0.1%	Rank history: not on the FY2022 list, #43 in FY2023, #46 in FY2024 and #40 in FY2025; up 35 since FY2020.
45	SZY Holdings, LLC Top agencies DLA (Defense Logistics Agency)	$80,474	0.1%	Rank history: #40 in FY2022, #66 in FY2023, #36 in FY2024 and #43 in FY2025; down 10 since FY2020.
46	Tobii Assistive Technology, Inc. Through Tobii Dynavox LLC Top agencies VA (Department of Veterans Affairs)	$79,241	0.1%	Rank history: #41 in FY2022 and not on the FY2023–FY2025 lists; up 29 since FY2020.
47	AMO Sales and Service, Inc. Top agencies DHA (Defense Health Agency)	$77,420	0.1%	Rank history: #30 in FY2022 and not on the FY2023–FY2025 lists; up 3 since FY2020.
48	CDW Corporation Through CDW Government LLC Top agencies DOT (Department of Transportation)	$75,769	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
49	Scanlan International Inc. Top agencies Army (Department of the Army)	$73,591	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
50	Roundtable Healthcare Partners LP Through Beaver-Visitec International, Inc. Top agencies DHA (Defense Health Agency)	$72,013	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
51	Vanguard Global Solutions, Inc. Top agencies VA (Department of Veterans Affairs)	$66,488	0.1%	Rank history: not on the FY2022–FY2025 lists; up 51 since FY2020.
52	Four Points Technology, L.L.C. Top agencies VA (Department of Veterans Affairs)	$60,089	0.1%	Rank history: not on the FY2022–FY2025 lists; down 9 since FY2020.
53	Topcon Corporation Through Topcon Healthcare, Inc. Top agencies VA (Department of Veterans Affairs)	$58,919	0.1%	Rank history: #17 in FY2022 and not on the FY2023–FY2025 lists; down 24 since FY2020.
54	Infleqtion Quantum, LLC Top agencies Navy (Department of the Navy)	$58,534	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
55	Aantilia LLC Top agencies Army (Department of the Army)	$57,086	0.1%	Rank history: not on the FY2022–FY2023 lists, #74 in FY2024 and #51 in FY2025; down 10 since FY2020.
56	Danaher Corporation 3 awardees, including Beckman Coulter, Inc. and Leica Microsystems Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$54,195	0.1%	Rank history: #25 in FY2022, #24 in FY2023, #25 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
57	Electra-Med Corporation Top agencies VA (Department of Veterans Affairs)	$51,352	0.1%	Rank history: not on the FY2022–FY2023 lists, #78 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
58	Ametek Inc. Through Reichert Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) DLA (Defense Logistics Agency)	$46,048	0.1%	Rank history: not on the FY2022–FY2025 lists; up 12 since FY2020.
59	Florida Lions Eye Bank, Inc. Top agencies VA (Department of Veterans Affairs)	$42,750	0.1%	Rank history: not on the FY2022–FY2024 lists and #34 in FY2025; new, not ranked in FY2020.
60	Kennedy Eye Care LLC Top agencies Army (Department of the Army)	$41,557	0.1%	Rank history: #61 in FY2022, #70 in FY2023 and not on the FY2024–FY2025 lists; up 13 since FY2020.
61	Innova Systems Inc. Top agencies HHS (Department of Health and Human Services) Army (Department of the Army)	$41,020	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
62	Modern Eyes Ltd Top agencies HHS (Department of Health and Human Services)	$40,000	<0.1%	Rank history: #82 in FY2022, not on the FY2023 list, #32 in FY2024 and not on the FY2025 list; up 32 since FY2020.
63	San Diego Eye Bank Top agencies DHA (Defense Health Agency)	$38,275	<0.1%	Rank history: #79 in FY2022, #44 in FY2023 and not on the FY2024–FY2025 lists; up 11 since FY2020.
64	Sagico VA Usa, LLC Top agencies HHS (Department of Health and Human Services)	$37,639	<0.1%	Rank history: #63 in FY2022, #56 in FY2023, #56 in FY2024 and #26 in FY2025; up 14 since FY2020.
65	Duke University Top agencies VA (Department of Veterans Affairs)	$36,993	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
66	Plenoptika, Inc. Top agencies VA (Department of Veterans Affairs)	$35,700	<0.1%	Rank history: #69 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
67	Alpine Conglomerate, LLC Top agencies VA (Department of Veterans Affairs)	$33,201	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
68	Quantel Medical Device Sales Usa, Inc. Top agencies VA (Department of Veterans Affairs)	$32,250	<0.1%	Rank history: #56 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
69	Walman Optical Co Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$31,541	<0.1%	Rank history: #65 in FY2022, not on the FY2023 list, #49 in FY2024 and not on the FY2025 list; unchanged since FY2020.
70	Micro Medical Devices, Inc. Top agencies VA (Department of Veterans Affairs)	$30,480	<0.1%	Rank history: #95 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
71	Thundercloud Optical, LLC Top agencies HHS (Department of Health and Human Services)	$22,688	<0.1%	Rank history: #55 in FY2022, #46 in FY2023, #33 in FY2024 and #17 in FY2025; up 34 since FY2020.
72	Sound Medical Devices, LLC Top agencies VA (Department of Veterans Affairs)	$22,373	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
73	Genesis Vision, Inc. Top agencies Army (Department of the Army)	$20,792	<0.1%	Rank history: not on the FY2022 list, #99 in FY2023 and not on the FY2024–FY2025 lists; down 21 since FY2020.
74	An-Vision Inc. Top agencies VA (Department of Veterans Affairs)	$20,160	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
75	Phoenix Trading Inc. Top agencies DLA (Defense Logistics Agency)	$19,962	<0.1%	Rank history: #74 in FY2022, not on the FY2023 list, #85 in FY2024 and #57 in FY2025; up 41 since FY2020.
76	World Wide Medical Distributors, Inc. Top agencies VA (Department of Veterans Affairs)	$19,888	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 33 since FY2020.
77	Seva Technical Services, Inc. Top agencies VA (Department of Veterans Affairs)	$18,386	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
78	Enochs Eye Care, PLLC Top agencies Navy (Department of the Navy)	$18,025	<0.1%	Rank history: #100 in FY2022, #81 in FY2023, #84 in FY2024 and not on the FY2025 list; up 8 since FY2020.
79	Alliant Enterprises, LLC Top agencies HHS (Department of Health and Human Services)	$18,000	<0.1%	Rank history: not on the FY2022 list, #30 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
80	1 Acquisitions LLC Top agencies VA (Department of Veterans Affairs)	$17,710	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
81	Theodor Wille Intertrade GMBH Through Atlantic Diving Supply, Inc. Top agencies USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$16,738	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 45 since FY2020.
82	Summit Medical Inc. Top agencies VA (Department of Veterans Affairs)	$16,240	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
83	PC Vision Inc. Top agencies USAF (Department of the Air Force)	$15,990	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
84	Eastern Ophthalmic Supply and Repair, Inc. Top agencies VA (Department of Veterans Affairs)	$15,490	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
85	International Distributors of Electronics for Medicine Top agencies Army (Department of the Army)	$15,044	<0.1%	Rank history: #77 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
86	CAL Coast Ophthalmic Instruments, Inc. Top agencies HHS (Department of Health and Human Services)	$13,500	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
87	B & H International LLC Top agencies HHS (Department of Health and Human Services)	$13,465	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
88	HTS Inc. Top agencies VA (Department of Veterans Affairs)	$11,450	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
89	Regulus Global LLC Top agencies DLA (Defense Logistics Agency)	$11,146	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
90	Art-Craft Optical Company, Inc. Top agencies DLA (Defense Logistics Agency)	$11,025	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
91	Thundercloud LLC Top agencies HHS (Department of Health and Human Services)	$6,783	<0.1%	Rank history: #89 in FY2022, #67 in FY2023, #73 in FY2024 and not on the FY2025 list; down 11 since FY2020.
92	Ars Sales & Services LLC Top agencies DLA (Defense Logistics Agency)	$6,210	<0.1%	Rank history: not on the FY2022 list, #88 in FY2023, #92 in FY2024 and #81 in FY2025; down 11 since FY2020.
93	Scarlett Enterprises LLC Top agencies DLA (Defense Logistics Agency)	$5,961	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 22 since FY2020.
94	Native Instinct LLC Top agencies VA (Department of Veterans Affairs)	$5,735	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 16 since FY2020.
95	Carl Zeiss X-RAY Microscopy Inc. Through Carl Zeiss Meditec Inc. Top agencies DHA (Defense Health Agency)	$5,000	<0.1%	Rank history: not on the FY2022 list, #68 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
96	Lakota Enterprises Inc. Top agencies HHS (Department of Health and Human Services)	$5,000	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 1 since FY2020.
97	Arcscan, Inc. Top agencies DHA (Defense Health Agency)	$5,000	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 16 since FY2020.
98	Kampi Components Co Inc. Top agencies DLA (Defense Logistics Agency)	$3,488	<0.1%	Rank history: not on the FY2022 list, #89 in FY2023, not on the FY2024 list and #84 in FY2025; up 2 since FY2020.
99	International Television Corporation Top agencies DLA (Defense Logistics Agency)	$3,421	<0.1%	Rank history: #80 in FY2022 and not on the FY2023–FY2025 lists; up 19 since FY2020.
100	U.s. Tactical Supply, Inc. Top agencies DLA (Defense Logistics Agency)	$2,950	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.

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100 of 123 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 $81.5 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 6540 contractors in FY2021?

1. PDS Consultants, Inc. ($31.7M), 2. Melling LLC ($6.07M), 3. Superior Optical Labs, Inc. ($5.8M), 4. Proaim Americas, Llc. ($4.68M), 5. Lombart Brothers Inc. ($3.35M), 6. Meisystem Inc. ($1.77M), 7. L1 Enterprises Incorporated ($1.59M), 8. Corps Medical Supply, LLC ($1.39M), 9. Corps Biologics LLC ($1.28M), 10. Human Technologies Corp ($1.26M).

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