Top 100 Contractors in PSC 4220: Marine Lifesaving and Diving Equipment, FY2021

Name: Top 100 Contractors in PSC 4220: Marine Lifesaving and Diving Equipment, FY2021
Creator: GovTribe

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

The top 10 won 99% of FY2021 PSC 4220 contract dollars

Contract obligations: $3,431,375,802 Net of deobligations, by contracts coded PSC 4220
Contractors: 143 Parent companies with an obligation
Largest contractor: Theodor Wille Intertrade GMBH $2.53 billion, 73.7% 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	Theodor Wille Intertrade GMBH Through Atlantic Diving Supply, Inc. Top agencies DLA (Defense Logistics Agency) USAF (Department of the Air Force) Commerce (Department of Commerce)	$2,530,585,548	73.7%	Rank history: #1 in FY2022, #1 in FY2023, #5 in FY2024 and not on the FY2025 list; unchanged since FY2020.
2	W S Darley & Co Top agencies DLA (Defense Logistics Agency)	$357,921,090	10.4%	Rank history: #2 in FY2022, #2 in FY2023, #2 in FY2024 and #2 in FY2025; unchanged since FY2020.
3	Federal Resources Supply Company 2 awardees Top agencies DLA (Defense Logistics Agency)	$256,832,779	7.5%	Rank history: #6 in FY2022, #18 in FY2023, #64 in FY2024 and #24 in FY2025; unchanged since FY2020.
4	Noble Sales Co. Inc. 2 awardees, including Noble Supply & Logistics, LLC and Tactical & Survival Specialties, LLC Top agencies DLA (Defense Logistics Agency)	$105,569,339	3.1%	Rank history: #4 in FY2022, not on the FY2023 list, #3 in FY2024 and #3 in FY2025; new, not ranked in FY2020.
5	Supplycore LLC Top agencies DLA (Defense Logistics Agency)	$69,773,813	2.0%	Rank history: #5 in FY2022, #4 in FY2023, #4 in FY2024 and #4 in FY2025; new, not ranked in FY2020.
6	Atlantic Diving Supply, Inc. Top agencies DLA (Defense Logistics Agency)	$21,907,023	0.6%	Rank history: #13 in FY2022, not on the FY2023 list, #1 in FY2024 and #1 in FY2025; down 1 since FY2020.
7	Quantico Tactical Incorporated Top agencies DLA (Defense Logistics Agency)	$20,605,316	0.6%	Rank history: not on the FY2022–FY2024 lists and #82 in FY2025; down 3 since FY2020.
8	Onex Corporation Through RFD Beaufort Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$13,402,059	0.4%	Rank history: not on the FY2022 list, #5 in FY2023, #22 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
9	RFD Beaufort Inc. Top agencies Navy (Department of the Navy)	$12,866,805	0.4%	Rank history: #7 in FY2022, #49 in FY2023, #20 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
10	Tactical & Survival Specialties, LLC Top agencies DLA (Defense Logistics Agency)	$12,753,854	0.4%	Rank history: not on the FY2022–FY2025 lists; down 4 since FY2020.
11	SAFRAN 2 awardees, including Air Cruisers Company, LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DHS (Department of Homeland Security)	$5,444,476	0.2%	Rank history: #11 in FY2022, #16 in FY2023, #7 in FY2024 and #7 in FY2025; unchanged since FY2020.
12	Wing Inflatables Inc. 2 awardees, including Patten Co., Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$5,117,817	0.1%	Rank history: #8 in FY2022, #7 in FY2023, #9 in FY2024 and not on the FY2025 list; up 1 since FY2020.
13	Switlik Parachute Company, Inc. Top agencies DLA (Defense Logistics Agency) Army (Department of the Army) DHS (Department of Homeland Security)	$2,087,463	0.1%	Rank history: #9 in FY2022, #9 in FY2023, #8 in FY2024 and #8 in FY2025; up 3 since FY2020.
14	Firstspear, LLC Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency) USSOCOM (United States Special Operations Command)	$1,192,450	<0.1%	Rank history: #26 in FY2022, #26 in FY2023, #26 in FY2024 and #22 in FY2025; up 1 since FY2020.
15	Gentex Corporation 2 awardees Top agencies DLA (Defense Logistics Agency)	$1,021,950	<0.1%	Rank history: #14 in FY2022, #63 in FY2023, #14 in FY2024 and #13 in FY2025; up 3 since FY2020.
16	ADI Technologies Inc. Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security)	$903,084	<0.1%	Rank history: #17 in FY2022, #11 in FY2023, #59 in FY2024 and not on the FY2025 list; up 4 since FY2020.
17	Unifire Inc Top agencies DLA (Defense Logistics Agency)	$862,569	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 7 since FY2020.
18	Sovax Corp Top agencies USSOCOM (United States Special Operations Command)	$783,217	<0.1%	Rank history: #18 in FY2022, #23 in FY2023, #28 in FY2024 and #46 in FY2025; up 8 since FY2020.
19	Ocenco Inc. 2 awardees, including Interspiro Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$708,909	<0.1%	Rank history: #31 in FY2022, #13 in FY2023, #23 in FY2024 and #10 in FY2025; up 10 since FY2020.
20	Kampi Components Co Inc. Top agencies DLA (Defense Logistics Agency)	$633,325	<0.1%	Rank history: #57 in FY2022, #65 in FY2023, not on the FY2024 list and #32 in FY2025; up 3 since FY2020.
21	Inflation Systems, Inc. Top agencies DLA (Defense Logistics Agency)	$624,267	<0.1%	Rank history: #21 in FY2022, #10 in FY2023, #25 in FY2024 and #17 in FY2025; down 4 since FY2020.
22	Capewell Aerial Systems LLC Through Aerial Machine & Tool Corporation Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security)	$621,754	<0.1%	Rank history: #30 in FY2022, #42 in FY2023, #29 in FY2024 and #20 in FY2025; up 22 since FY2020.
23	David Clark Company Incorporated Through Air-Lock, Incorporated Top agencies DLA (Defense Logistics Agency)	$545,070	<0.1%	Rank history: not on the FY2022 list, #32 in FY2023, #61 in FY2024 and #40 in FY2025; up 81 since FY2020.
24	Safariland LLC 2 awardees, including Mustang Survival Mfg, Inc. and Mustang Survival, Inc. Top agencies Army (Department of the Army) DHS (Department of Homeland Security)	$512,547	<0.1%	Rank history: #88 in FY2022, #57 in FY2023 and not on the FY2024–FY2025 lists; up 36 since FY2020.
25	BAE Systems PLC Through BAE Systems Land & Armaments L.P. Top agencies DLA (Defense Logistics Agency)	$496,809	<0.1%	Rank history: #23 in FY2022, #8 in FY2023, #17 in FY2024 and not on the FY2025 list; down 16 since FY2020.
26	BAE Systems Land & Armaments L.P. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$429,670	<0.1%	Rank history: #85 in FY2022, not on the FY2023 list, #18 in FY2024 and #9 in FY2025; up 96 since FY2020.
27	Shore Solutions, Inc. Top agencies GSA (General Services Administration) DLA (Defense Logistics Agency)	$398,786	<0.1%	Rank history: not on the FY2022 list, #70 in FY2023 and not on the FY2024–FY2025 lists; up 12 since FY2020.
28	Propel, LLC Top agencies DLA (Defense Logistics Agency)	$352,673	<0.1%	Rank history: #10 in FY2022, #33 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
29	Cobham Advanced Electron Through Mission Systems Davenport Inc. Top agencies Navy (Department of the Navy)	$349,549	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
30	Defense Venture Holdings, LLC Top agencies DLA (Defense Logistics Agency)	$322,181	<0.1%	Rank history: #27 in FY2022, #19 in FY2023, #16 in FY2024 and #15 in FY2025; new, not ranked in FY2020.
31	Leland Limited Inc. Top agencies DLA (Defense Logistics Agency)	$306,519	<0.1%	Rank history: #16 in FY2022, #20 in FY2023, #6 in FY2024 and #14 in FY2025; up 4 since FY2020.
32	Cobham Advanced Electronic Solutions Inc. Through Mission Systems Davenport Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$298,946	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 18 since FY2020.
33	Patriot Industries, Inc. Top agencies DHS (Department of Homeland Security)	$270,860	<0.1%	Rank history: #19 in FY2022 and not on the FY2023–FY2025 lists; up 10 since FY2020.
34	Transaero, Inc. Top agencies DLA (Defense Logistics Agency)	$237,574	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
35	Victor Forward LLC Top agencies USSOCOM (United States Special Operations Command)	$236,328	<0.1%	Rank history: not on the FY2022 list, #51 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
36	Amron International Inc. Top agencies DLA (Defense Logistics Agency) USSOCOM (United States Special Operations Command)	$209,296	<0.1%	Rank history: #41 in FY2022, #38 in FY2023, #37 in FY2024 and #39 in FY2025; down 17 since FY2020.
37	Tinosa, Inc. Top agencies USSOCOM (United States Special Operations Command)	$202,277	<0.1%	Rank history: #32 in FY2022, #17 in FY2023, #27 in FY2024 and #36 in FY2025; down 5 since FY2020.
38	U S Divers Co Inc Through Aqualung Usa, Inc. Top agencies USSOCOM (United States Special Operations Command) Navy (Department of the Navy)	$196,696	<0.1%	Rank history: #38 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
39	Depaul Industries Through Fort Rock Tactical LLC Top agencies DLA (Defense Logistics Agency)	$182,700	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
40	North End Group LLC Top agencies DLA (Defense Logistics Agency)	$151,453	<0.1%	Rank history: #24 in FY2022, #31 in FY2023, #52 in FY2024 and #44 in FY2025; new, not ranked in FY2020.
41	B & H International LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$142,942	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
42	V1 Printcompany A/S Through Viking Life-Saving Equipment (America), Inc. Top agencies Navy (Department of the Navy)	$126,000	<0.1%	Rank history: #20 in FY2022, #6 in FY2023, #31 in FY2024 and not on the FY2025 list; down 18 since FY2020.
43	Lifesaving Systems LLC Top agencies DHS (Department of Homeland Security) DLA (Defense Logistics Agency)	$125,759	<0.1%	Rank history: #36 in FY2022, #27 in FY2023, #32 in FY2024 and #25 in FY2025; up 5 since FY2020.
44	High TECH Diving & Safety, Inc. Top agencies DLA (Defense Logistics Agency)	$121,857	<0.1%	Rank history: #80 in FY2022, #59 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
45	Global Pcci (Gpc) Top agencies Navy (Department of the Navy)	$121,567	<0.1%	Rank history: not on the FY2022–FY2023 lists, #92 in FY2024 and not on the FY2025 list; up 9 since FY2020.
46	Henderson Aquatic Inc Through Henderson Aquatics Inc. Top agencies DLA (Defense Logistics Agency)	$111,248	<0.1%	Rank history: #61 in FY2022, #39 in FY2023, #78 in FY2024 and not on the FY2025 list; down 13 since FY2020.
47	Black Bay Aerospace LLC Top agencies DLA (Defense Logistics Agency)	$107,931	<0.1%	Rank history: #55 in FY2022, #30 in FY2023, #24 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
48	American Diving Supply LLC Top agencies DLA (Defense Logistics Agency) VA (Department of Veterans Affairs)	$107,095	<0.1%	Rank history: #45 in FY2022, #25 in FY2023, #30 in FY2024 and #28 in FY2025; up 42 since FY2020.
49	United Sar, Inc. Top agencies DLA (Defense Logistics Agency)	$106,658	<0.1%	Rank history: #46 in FY2022, #53 in FY2023, #40 in FY2024 and #66 in FY2025; down 27 since FY2020.
50	Waygate Technologies USA LP Top agencies Navy (Department of the Navy)	$102,088	<0.1%	Rank history: not on the FY2022–FY2024 lists and #50 in FY2025; new, not ranked in FY2020.
51	U.s. Pan American Solutions LLC Top agencies Navy (Department of the Navy)	$98,950	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
52	Life Support International Inc. Top agencies Army (Department of the Army)	$96,855	<0.1%	Rank history: #78 in FY2022, not on the FY2023 list, #57 in FY2024 and #12 in FY2025; down 24 since FY2020.
53	Donatini, Inc. Top agencies DHS (Department of Homeland Security)	$91,960	<0.1%	Rank history: #71 in FY2022, not on the FY2023 list, #42 in FY2024 and #80 in FY2025; new, not ranked in FY2020.
54	Sera Star, LLC Top agencies DLA (Defense Logistics Agency)	$86,862	<0.1%	Rank history: #56 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
55	Weckworth Manufacturing, Inc. Top agencies DLA (Defense Logistics Agency)	$84,467	<0.1%	Rank history: #22 in FY2022, #22 in FY2023, not on the FY2024 list and #27 in FY2025; down 6 since FY2020.
56	American Engineering & Manufacturing, Inc. Top agencies DLA (Defense Logistics Agency)	$79,875	<0.1%	Rank history: #54 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
57	Advance Safety Equipment Co. Top agencies DLA (Defense Logistics Agency)	$76,541	<0.1%	Rank history: #34 in FY2022, #12 in FY2023, #19 in FY2024 and #21 in FY2025; down 23 since FY2020.
58	House of Scuba, Inc. Top agencies DLA (Defense Logistics Agency)	$73,961	<0.1%	Rank history: #25 in FY2022, not on the FY2023 list, #56 in FY2024 and #42 in FY2025; down 6 since FY2020.
59	Aweigh All Boats LLC Top agencies Navy (Department of the Navy)	$68,252	<0.1%	Rank history: #94 in FY2022, not on the FY2023 list, #83 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
60	Dive Lab, Inc. Top agencies Army (Department of the Army)	$67,070	<0.1%	Rank history: not on the FY2022–FY2023 lists, #49 in FY2024 and not on the FY2025 list; up 5 since FY2020.
61	Dresser-Argus, Inc. Top agencies DLA (Defense Logistics Agency)	$65,684	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
62	The Elite Gypsy Corp Top agencies Commerce (Department of Commerce)	$63,842	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
63	Turnbull LLC 2 awardees Top agencies DLA (Defense Logistics Agency)	$61,920	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 12 since FY2020.
64	CPR Savers & First Aid Supply, LLC Top agencies DLA (Defense Logistics Agency)	$61,600	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
65	Puget Sound Inflatables, Inc. Top agencies Navy (Department of the Navy)	$59,410	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
66	Undersea Systems International, Inc. Top agencies DLA (Defense Logistics Agency)	$53,889	<0.1%	Rank history: #60 in FY2022, not on the FY2023 list, #80 in FY2024 and not on the FY2025 list; down 7 since FY2020.
67	Darbonnier Tactical Supply LLC Top agencies USSOCOM (United States Special Operations Command) DLA (Defense Logistics Agency)	$52,477	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 16 since FY2020.
68	Sauer Compressors USA Inc. Top agencies Navy (Department of the Navy)	$51,832	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
69	Custom Design & Fabrication, Ltd. Top agencies Navy (Department of the Navy)	$47,028	<0.1%	Rank history: #37 in FY2022, #55 in FY2023, #58 in FY2024 and not on the FY2025 list; down 33 since FY2020.
70	Tact360, Inc. Top agencies DLA (Defense Logistics Agency)	$44,963	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 32 since FY2020.
71	General Dynamics Corporation 2 awardees, including Electric Boat Corporation and Gulfstream Aerospace Corporation Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security)	$43,964	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
72	Marks & Company USA Inc. Top agencies DLA (Defense Logistics Agency)	$43,815	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
73	ISI North America Inc. Top agencies DLA (Defense Logistics Agency)	$42,543	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 16 since FY2020.
74	A.g.h. Industries, LLC Top agencies DLA (Defense Logistics Agency)	$41,390	<0.1%	Rank history: #63 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
75	Diving Unlimited International Inc. Top agencies DHS (Department of Homeland Security)	$40,085	<0.1%	Rank history: not on the FY2022 list, #64 in FY2023, #86 in FY2024 and #57 in FY2025; up 9 since FY2020.
76	Royal Media Network, Inc. Top agencies Navy (Department of the Navy)	$36,438	<0.1%	Rank history: #52 in FY2022 and not on the FY2023–FY2025 lists; down 7 since FY2020.
77	Xram Limited Top agencies Commerce (Department of Commerce)	$35,241	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 24 since FY2020.
78	Wisecom Technologies Inc. Top agencies Navy (Department of the Navy)	$34,501	<0.1%	Rank history: #40 in FY2022, #54 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
79	Scubadelphia, LLC Top agencies DLA (Defense Logistics Agency)	$34,191	<0.1%	Rank history: #58 in FY2022, #58 in FY2023, #63 in FY2024 and not on the FY2025 list; down 8 since FY2020.
80	Southern Automotive Wholesalers, Inc. Top agencies DLA (Defense Logistics Agency)	$29,026	<0.1%	Rank history: not on the FY2022 list, #97 in FY2023 and not on the FY2024–FY2025 lists; up 11 since FY2020.
81	S I T Corporation Top agencies DLA (Defense Logistics Agency)	$28,890	<0.1%	Rank history: #72 in FY2022, not on the FY2023–FY2024 lists and #33 in FY2025; down 13 since FY2020.
82	RTX Corporation Through Hamilton Sundstrand Corporation Top agencies DLA (Defense Logistics Agency)	$28,790	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 7 since FY2020.
83	Warfighter Focused Logistics Inc. Top agencies DLA (Defense Logistics Agency)	$25,893	<0.1%	Rank history: not on the FY2022 list, #99 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
84	Peck Enterprises LLC Top agencies Navy (Department of the Navy)	$25,243	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
85	Jgils, LLC Top agencies DLA (Defense Logistics Agency)	$23,803	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 64 since FY2020.
86	Gigli Enterprises, Inc. Top agencies DLA (Defense Logistics Agency)	$21,293	<0.1%	Rank history: #64 in FY2022, #35 in FY2023, #54 in FY2024 and not on the FY2025 list; up 32 since FY2020.
87	Kel-Lac Uniforms Inc. Top agencies USAF (Department of the Air Force)	$20,611	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
88	Trycon Enterprises, L.L.C. Top agencies Navy (Department of the Navy)	$20,074	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
89	Precision Products Inc. Top agencies DLA (Defense Logistics Agency)	$19,880	<0.1%	Rank history: not on the FY2022–FY2023 lists, #72 in FY2024 and not on the FY2025 list; down 26 since FY2020.
90	Epsilon Systems Solutions, Inc. Top agencies Navy (Department of the Navy)	$19,738	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
91	The H R Hillery Company Top agencies Navy (Department of the Navy)	$19,453	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
92	Perlane Sales, Inc. Top agencies DLA (Defense Logistics Agency)	$19,305	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
93	Willard Marine, Inc. Top agencies Navy (Department of the Navy)	$18,272	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
94	Eastern Power Technologies Inc. Top agencies Navy (Department of the Navy)	$16,494	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
95	Nu Venture Diving Co Top agencies Navy (Department of the Navy)	$16,320	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 31 since FY2020.
96	Worthington Industries, Inc. Through Worthington Cylinder Corporation Top agencies Navy (Department of the Navy)	$14,245	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
97	Stealth Supply, Inc. Top agencies DLA (Defense Logistics Agency)	$13,462	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 18 since FY2020.
98	Dreamfind, Inc. Top agencies DLA (Defense Logistics Agency)	$13,450	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 17 since FY2020.
99	VSE Corporation Top agencies DLA (Defense Logistics Agency)	$13,325	<0.1%	Rank history: #84 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
100	Echelon Supply and Service, Inc. Top agencies DLA (Defense Logistics Agency)	$13,159	<0.1%	Rank history: not on the FY2022 list, #98 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.

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100 of 143 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 $3.43 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 PSC 4220 contractors in FY2021?

1. Theodor Wille Intertrade GMBH ($2.53B), 2. W S Darley & Co ($358M), 3. Federal Resources Supply Company ($257M), 4. Noble Sales Co. Inc. ($106M), 5. Supplycore LLC ($69.8M), 6. Atlantic Diving Supply, Inc. ($21.9M), 7. Quantico Tactical Incorporated ($20.6M), 8. Onex Corporation ($13.4M), 9. RFD Beaufort Inc. ($12.9M), 10. Tactical & Survival Specialties, LLC ($12.8M).

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