Top 100 Contractors in NAICS 335911: Storage Battery Manufacturing, FY2021

Name: Top 100 Contractors in NAICS 335911: Storage Battery Manufacturing, FY2021
Creator: GovTribe

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

The top 10 won 73% of FY2021 NAICS 335911 contract dollars

Contract obligations: $195,002,002 Net of deobligations, by contracts coded NAICS 335911
Contractors: 336 Parent companies with an obligation
Largest contractor: Enersys $61.5 million, 31.1% 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	Enersys 4 awardees, including Enersys Energy Products Inc. and Enersys Delaware Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) Army (Department of the Army)	$61,459,621	31.1%	Rank history: #1 in FY2022, #1 in FY2023, #1 in FY2024 and not on the FY2025 list; unchanged since FY2020.
2	Exide Technologies 2 awardees, including Stryten Energy LLC Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$12,824,927	6.5%	Rank history: #15 in FY2022 and not on the FY2023–FY2025 lists; unchanged since FY2020.
3	Johnson Controls Security Solutions LLC 2 awardees, including Clarios, LLC and Johnson Controls Navy Systems, LLC Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$12,623,466	6.4%	Rank history: #7 in FY2022, #2 in FY2023, #2 in FY2024 and not on the FY2025 list; unchanged since FY2020.
4	OM Group Inc. Through Eaglepicher Technologies LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) Army (Department of the Army)	$12,261,055	6.2%	Rank history: #2 in FY2022, #18 in FY2023, #21 in FY2024 and not on the FY2025 list; unchanged since FY2020.
5	Leonardo S.p.A. 3 awardees, including DRS Naval Power Systems Inc. and Pivotal Power Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$11,436,500	5.8%	Rank history: #8 in FY2022 and not on the FY2023–FY2025 lists; up 4 since FY2020.
6	Stryten Energy LLC 2 awardees Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency) DHS (Department of Homeland Security)	$9,672,676	4.9%	Rank history: #4 in FY2022, #3 in FY2023, #7 in FY2024 and #3 in FY2025; new, not ranked in FY2020.
7	Concorde Battery Corporation Top agencies DLA (Defense Logistics Agency) DOI (Department of the Interior) Navy (Department of the Navy)	$7,455,368	3.8%	Rank history: #5 in FY2022, #5 in FY2023, #5 in FY2024 and #6 in FY2025; up 1 since FY2020.
8	Angel Holdings LLC Through C&D Technologies, Inc. Top agencies DLA (Defense Logistics Agency)	$6,289,712	3.2%	Rank history: #9 in FY2022 and not on the FY2023–FY2025 lists; down 2 since FY2020.
9	Hitech Glass, LLC Top agencies DLA (Defense Logistics Agency)	$5,628,142	2.8%	Rank history: #3 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
10	Teledyne Technologies Incorporated 2 awardees, including Teledyne Instruments, Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$3,560,623	1.8%	Rank history: #14 in FY2022, #16 in FY2023, #8 in FY2024 and #7 in FY2025; up 10 since FY2020.
11	Sunpower Corporation 3 awardees, including Saft America Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) DHS (Department of Homeland Security)	$3,396,087	1.7%	Rank history: #18 in FY2022, #9 in FY2023, #22 in FY2024 and not on the FY2025 list; up 2 since FY2020.
12	East Penn Manufacturing Co. 2 awardees, including Navitas Advanced Solutions Group LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$3,316,495	1.7%	Rank history: #17 in FY2022 and not on the FY2023–FY2025 lists; up 27 since FY2020.
13	Bren-Tronics Defense LLC Top agencies DLA (Defense Logistics Agency) Army (Department of the Army) Navy (Department of the Navy)	$2,759,863	1.4%	Rank history: #20 in FY2022, #11 in FY2023, #19 in FY2024 and #10 in FY2025; up 14 since FY2020.
14	First Logistex, Inc. Top agencies DOT (Department of Transportation)	$2,393,203	1.2%	Rank history: #16 in FY2022, #6 in FY2023 and not on the FY2024–FY2025 lists; up 5 since FY2020.
15	RTX Corporation 2 awardees, including Raytheon Company and Kidde Technologies Inc. Top agencies DLA (Defense Logistics Agency)	$2,281,781	1.2%	Rank history: #93 in FY2022, #19 in FY2023, #32 in FY2024 and not on the FY2025 list; down 3 since FY2020.
16	Maetec Power, LLC Top agencies DOT (Department of Transportation)	$2,156,980	1.1%	Rank history: #13 in FY2022, #7 in FY2023 and not on the FY2024–FY2025 lists; up 5 since FY2020.
17	Transdigm Group Incorporated 2 awardees, including Acme Aerospace, Inc. and Marathonnorco Aerospace, Inc. Top agencies DLA (Defense Logistics Agency)	$2,127,506	1.1%	Rank history: #11 in FY2022, #8 in FY2023, #14 in FY2024 and not on the FY2025 list; down 10 since FY2020.
18	Kampi Components Co Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$2,082,774	1.1%	Rank history: #27 in FY2022, #23 in FY2023, not on the FY2024 list and #21 in FY2025; up 15 since FY2020.
19	Fiamm Energy Technology (USA) LLC Top agencies DLA (Defense Logistics Agency)	$1,546,776	0.8%	Rank history: not on the FY2022–FY2025 lists; down 1 since FY2020.
20	Astro Digital US Inc. Top agencies Navy (Department of the Navy)	$1,400,000	0.7%	Rank history: #92 in FY2022, #28 in FY2023, #30 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
21	Remy Battery Co Inc. Top agencies DLA (Defense Logistics Agency)	$1,130,259	0.6%	Rank history: #22 in FY2022, #21 in FY2023, #11 in FY2024 and #12 in FY2025; up 1 since FY2020.
22	Battery Service Corporation Top agencies DLA (Defense Logistics Agency)	$1,106,080	0.6%	Rank history: #29 in FY2022, #22 in FY2023, #20 in FY2024 and #27 in FY2025; up 1 since FY2020.
23	Showa Denko K.K. Through Fiamm Energy Technology (USA) LLC Top agencies DLA (Defense Logistics Agency)	$1,069,299	0.5%	Rank history: #10 in FY2022, #4 in FY2023, #9 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
24	MPR Associates, Inc. Top agencies Navy (Department of the Navy)	$877,403	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
25	Wholesale Batteries, Inc. Top agencies DLA (Defense Logistics Agency) Commerce (Department of Commerce) Navy (Department of the Navy)	$876,404	0.4%	Rank history: #33 in FY2022, #17 in FY2023, #18 in FY2024 and #17 in FY2025; down 1 since FY2020.
26	Jamison Professional Services LLC Top agencies DLA (Defense Logistics Agency)	$831,096	0.4%	Rank history: #12 in FY2022 and not on the FY2023–FY2025 lists; down 21 since FY2020.
27	E-One Moli Energy (CANADA) Limited 2 awardees Top agencies NASA (National Aeronautics and Space Administration)	$795,835	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
28	Thales Through Thales Defense & Security Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$788,780	0.4%	Rank history: not on the FY2022–FY2025 lists; down 13 since FY2020.
29	Battery Outlet, Inc. Top agencies DLA (Defense Logistics Agency)	$769,848	0.4%	Rank history: #36 in FY2022, #43 in FY2023, #23 in FY2024 and #35 in FY2025; up 15 since FY2020.
30	Hytech Associates Incorporated Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$766,655	0.4%	Rank history: #42 in FY2022, #57 in FY2023 and not on the FY2024–FY2025 lists; up 8 since FY2020.
31	Vertiv Corporation Top agencies DOJ (Department of Justice)	$745,534	0.4%	Rank history: #23 in FY2022, #14 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
32	Applied Power Services LLC Top agencies DOT (Department of Transportation)	$704,432	0.4%	Rank history: #26 in FY2022, #13 in FY2023 and not on the FY2024–FY2025 lists; up 10 since FY2020.
33	Inventus Power (ILLINOIS) LLC Top agencies Army (Department of the Army)	$616,495	0.3%	Rank history: not on the FY2022–FY2025 lists; up 63 since FY2020.
34	Alpine Power Systems Inc. Top agencies DOE (Department of Energy) DLA (Defense Logistics Agency) Commerce (Department of Commerce)	$506,557	0.3%	Rank history: #79 in FY2022, #69 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
35	EIC Laboratories, Inc. Top agencies USSOCOM (United States Special Operations Command)	$496,000	0.3%	Rank history: #41 in FY2022 and not on the FY2023–FY2025 lists; up 45 since FY2020.
36	Telecom Italia SPA Through Telecom Italia SPA O TIM S.P.A. Top agencies Navy (Department of the Navy)	$421,002	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
37	Windward Enterprises, LLC Top agencies DLA (Defense Logistics Agency)	$406,240	0.2%	Rank history: #28 in FY2022 and not on the FY2023–FY2025 lists; down 1 since FY2020.
38	Phoenix Trading Inc. Top agencies DLA (Defense Logistics Agency)	$395,808	0.2%	Rank history: #52 in FY2022, #75 in FY2023 and not on the FY2024–FY2025 lists; up 79 since FY2020.
39	Airbus Americas Inc. Through Satair Usa, Inc. Top agencies DLA (Defense Logistics Agency)	$380,697	0.2%	Rank history: #24 in FY2022 and not on the FY2023–FY2025 lists; down 22 since FY2020.
40	Incredible Supply LLC Top agencies DHS (Department of Homeland Security)	$376,201	0.2%	Rank history: #56 in FY2022, #24 in FY2023, #17 in FY2024 and #9 in FY2025; down 5 since FY2020.
41	Mesa Veterans Power LLC Top agencies DOT (Department of Transportation)	$375,027	0.2%	Rank history: #21 in FY2022, #20 in FY2023, #58 in FY2024 and not on the FY2025 list; down 13 since FY2020.
42	LTI Datacomm, Inc. Through Nova Power Solutions, Inc. Top agencies DLA (Defense Logistics Agency)	$369,439	0.2%	Rank history: #40 in FY2022, #30 in FY2023, #40 in FY2024 and not on the FY2025 list; up 1 since FY2020.
43	Ultralife Corp. Top agencies Army (Department of the Army)	$358,807	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
44	Integrated Procurement Technologies Top agencies DLA (Defense Logistics Agency)	$343,966	0.2%	Rank history: not on the FY2022–FY2025 lists; up 121 since FY2020.
45	JBA Construction LLC Top agencies Army (Department of the Army)	$317,000	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
46	Clarios, LLC Top agencies DLA (Defense Logistics Agency)	$299,863	0.2%	Rank history: #70 in FY2022, not on the FY2023 list, #6 in FY2024 and #1 in FY2025; down 32 since FY2020.
47	Motive Energy Incorporated Top agencies Navy (Department of the Navy)	$296,647	0.2%	Rank history: #90 in FY2022 and not on the FY2023–FY2025 lists; up 4 since FY2020.
48	Varma, Brajendra P Top agencies DLA (Defense Logistics Agency)	$277,723	0.1%	Rank history: #89 in FY2022 and not on the FY2023–FY2025 lists; down 3 since FY2020.
49	United Power & Battery Corporation Top agencies Army (Department of the Army) DOJ (Department of Justice) USDA (Department of Agriculture)	$263,456	0.1%	Rank history: not on the FY2022 list, #79 in FY2023, #64 in FY2024 and #43 in FY2025; up 90 since FY2020.
50	Total Online Protection LLC Top agencies DOI (Department of the Interior)	$258,746	0.1%	Rank history: not on the FY2022–FY2025 lists; up 104 since FY2020.
51	Martin Military Inc. Top agencies DLA (Defense Logistics Agency)	$256,144	0.1%	Rank history: #31 in FY2022, #46 in FY2023, #43 in FY2024 and #31 in FY2025; down 19 since FY2020.
52	Enersys Energy Products Inc. Top agencies DLA (Defense Logistics Agency)	$255,032	0.1%	Rank history: not on the FY2022–FY2025 lists; up 19 since FY2020.
53	Lynn Electronics LLC Top agencies DLA (Defense Logistics Agency)	$234,482	0.1%	Rank history: #49 in FY2022, #42 in FY2023 and not on the FY2024–FY2025 lists; down 3 since FY2020.
54	Dubai Enterprises Company Top agencies Army (Department of the Army)	$228,550	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
55	MJR Associates LLC Top agencies Army (Department of the Army) DLA (Defense Logistics Agency) DHS (Department of Homeland Security)	$224,349	0.1%	Rank history: #72 in FY2022 and not on the FY2023–FY2025 lists; up 5 since FY2020.
56	Livewire Battery Supply, Inc. Top agencies DOI (Department of the Interior) USAF (Department of the Air Force) Army (Department of the Army)	$223,284	0.1%	Rank history: #75 in FY2022, #37 in FY2023, not on the FY2024 list and #51 in FY2025; up 26 since FY2020.
57	Avex Electronics Corp. Top agencies DLA (Defense Logistics Agency)	$223,040	0.1%	Rank history: not on the FY2022–FY2025 lists; up 33 since FY2020.
58	Melton Sales & Service Top agencies DLA (Defense Logistics Agency)	$192,935	0.1%	Rank history: not on the FY2022 list, #41 in FY2023, #33 in FY2024 and #22 in FY2025; up 44 since FY2020.
59	C&D Technologies, Inc. Top agencies DLA (Defense Logistics Agency)	$192,880	0.1%	Rank history: #35 in FY2022 and not on the FY2023–FY2025 lists; down 48 since FY2020.
60	Creating Technology Solutions LLC Top agencies Army (Department of the Army)	$184,164	0.1%	Rank history: not on the FY2022–FY2025 lists; up 54 since FY2020.
61	Marvel Aero International, Inc. Top agencies USAF (Department of the Air Force)	$182,442	0.1%	Rank history: not on the FY2022–FY2025 lists; up 86 since FY2020.
62	Portable Power Systems, Inc. Top agencies DLA (Defense Logistics Agency) Army (Department of the Army)	$182,344	0.1%	Rank history: #51 in FY2022, #51 in FY2023, not on the FY2024 list and #32 in FY2025; up 44 since FY2020.
63	United Sales Assoc Inc. Top agencies DOE (Department of Energy)	$160,246	0.1%	Rank history: #54 in FY2022, #86 in FY2023 and not on the FY2024–FY2025 lists; down 26 since FY2020.
64	Edge Technology Distributors, Inc. Top agencies DLA (Defense Logistics Agency)	$155,488	0.1%	Rank history: #46 in FY2022, #25 in FY2023, #26 in FY2024 and #39 in FY2025; up 51 since FY2020.
65	Compu Dynamics LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) Commerce (Department of Commerce)	$152,239	0.1%	Rank history: not on the FY2022–FY2025 lists; up 44 since FY2020.
66	Gridless Power Corp Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice)	$150,546	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
67	ALK Investments LLC Top agencies Army (Department of the Army)	$147,079	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
68	Symmetry Resources, Inc. Top agencies NASA (National Aeronautics and Space Administration)	$146,811	0.1%	Rank history: not on the FY2022 list, #54 in FY2023, #45 in FY2024 and #29 in FY2025; new, not ranked in FY2020.
69	Southern Cross Aviation, LLC Top agencies DLA (Defense Logistics Agency)	$143,867	0.1%	Rank history: not on the FY2022–FY2025 lists; down 7 since FY2020.
70	Segundo Aviation LLC Top agencies DLA (Defense Logistics Agency)	$143,800	0.1%	Rank history: #81 in FY2022, #66 in FY2023 and not on the FY2024–FY2025 lists; up 29 since FY2020.
71	Charg, LLC Top agencies DLA (Defense Logistics Agency)	$140,599	0.1%	Rank history: #43 in FY2022, not on the FY2023–FY2024 lists and #25 in FY2025; down 5 since FY2020.
72	Global Logistics Strategies Inc. Top agencies DLA (Defense Logistics Agency)	$139,571	0.1%	Rank history: not on the FY2022–FY2025 lists; down 38 since FY2020.
73	Sajjad, Zainab S. Top agencies DLA (Defense Logistics Agency)	$137,125	0.1%	Rank history: not on the FY2022–FY2025 lists; down 18 since FY2020.
74	Madison Electric Co Top agencies DLA (Defense Logistics Agency) DOE (Department of Energy)	$136,173	0.1%	Rank history: #87 in FY2022, #59 in FY2023, #61 in FY2024 and #45 in FY2025; up 74 since FY2020.
75	Standbuy Distributors, Inc. Top agencies DLA (Defense Logistics Agency)	$130,302	0.1%	Rank history: #73 in FY2022 and not on the FY2023–FY2025 lists; down 18 since FY2020.
76	ST George Equipment LLC Top agencies Army (Department of the Army) VA (Department of Veterans Affairs)	$125,663	0.1%	Rank history: #77 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
77	Stratus Systems, Inc. Top agencies DLA (Defense Logistics Agency)	$123,251	0.1%	Rank history: not on the FY2022 list, #49 in FY2023, #44 in FY2024 and not on the FY2025 list; up 126 since FY2020.
78	VLX Solutions LLC Top agencies Army (Department of the Army) DOI (Department of the Interior) DLA (Defense Logistics Agency)	$117,312	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
79	Preferred Solutions Group, LLC Top agencies DLA (Defense Logistics Agency)	$113,610	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
80	Ruta Supplies Inc. Top agencies DLA (Defense Logistics Agency)	$113,265	0.1%	Rank history: not on the FY2022–FY2025 lists; up 25 since FY2020.
81	Octech Corporation Top agencies DLA (Defense Logistics Agency)	$110,460	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
82	Cap 360 LLC Top agencies DLA (Defense Logistics Agency)	$110,300	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
83	The Central Flyway Corp Top agencies Navy (Department of the Navy)	$108,955	0.1%	Rank history: not on the FY2022–FY2025 lists; down 7 since FY2020.
84	Tesla Industries Inc. Top agencies DLA (Defense Logistics Agency)	$105,440	0.1%	Rank history: not on the FY2022–FY2025 lists; up 149 since FY2020.
85	AEG Group Inc. Top agencies DLA (Defense Logistics Agency)	$105,352	0.1%	Rank history: #25 in FY2022 and not on the FY2023–FY2025 lists; down 56 since FY2020.
86	Netex Sales & Production Co Top agencies DLA (Defense Logistics Agency)	$104,585	0.1%	Rank history: #85 in FY2022, #50 in FY2023, #52 in FY2024 and #33 in FY2025; up 8 since FY2020.
87	Management Services Group, Inc. Top agencies DLA (Defense Logistics Agency)	$103,600	0.1%	Rank history: not on the FY2022–FY2025 lists; up 44 since FY2020.
88	Amprius Inc. Top agencies NASA (National Aeronautics and Space Administration)	$99,500	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
89	Ansys Inc. Top agencies Navy (Department of the Navy)	$99,000	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
90	Veterans Serving America LLC Top agencies VA (Department of Veterans Affairs) DLA (Defense Logistics Agency)	$94,681	<0.1%	Rank history: #38 in FY2022 and not on the FY2023–FY2025 lists; up 83 since FY2020.
91	Burhani Enterprises Inc. Top agencies DLA (Defense Logistics Agency) Army (Department of the Army)	$92,426	<0.1%	Rank history: not on the FY2022 list, #100 in FY2023 and not on the FY2024–FY2025 lists; down 33 since FY2020.
92	Adcour Inc. Top agencies DLA (Defense Logistics Agency)	$91,925	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 128 since FY2020.
93	Dela Technology Corporation Top agencies DLA (Defense Logistics Agency)	$91,212	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 74 since FY2020.
94	E W Yost Company Top agencies DLA (Defense Logistics Agency)	$89,941	<0.1%	Rank history: #47 in FY2022, #29 in FY2023, #27 in FY2024 and #14 in FY2025; down 16 since FY2020.
95	Flatwater Solutions Company Top agencies USAF (Department of the Air Force)	$89,307	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 14 since FY2020.
96	Noresco LLC Through Kidde Technologies Inc. Top agencies DLA (Defense Logistics Agency)	$89,274	<0.1%	Rank history: #65 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
97	Edward Buiel Consulting LLC Top agencies NASA (National Aeronautics and Space Administration)	$85,908	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 23 since FY2020.
98	Johnson Controls Battery Group Inc. Through Clarios, LLC Top agencies DLA (Defense Logistics Agency)	$84,739	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
99	SZY Holdings, LLC Top agencies DLA (Defense Logistics Agency)	$79,397	<0.1%	Rank history: not on the FY2022 list, #98 in FY2023, #68 in FY2024 and not on the FY2025 list; down 59 since FY2020.
100	Stationary Power Systems Inc. Top agencies DOT (Department of Transportation)	$79,359	<0.1%	Rank history: not on the FY2022 list, #39 in FY2023, #29 in FY2024 and #16 in FY2025; new, not ranked in FY2020.

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100 of 336 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 $198 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 NAICS 335911 contractors in FY2021?

1. Enersys ($61.5M), 2. Exide Technologies ($12.8M), 3. Johnson Controls Security Solutions LLC ($12.6M), 4. OM Group Inc. ($12.3M), 5. Leonardo S.p.A. ($11.4M), 6. Stryten Energy LLC ($9.67M), 7. Concorde Battery Corporation ($7.46M), 8. Angel Holdings LLC ($6.29M), 9. Hitech Glass, LLC ($5.63M), 10. Teledyne Technologies Incorporated ($3.56M).

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