Top 100 Contractors in NAICS 333996: Fluid Power Pump and Motor Manufacturing, FY2021

Name: Top 100 Contractors in NAICS 333996: Fluid Power Pump and Motor Manufacturing, FY2021
Creator: GovTribe

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

The top 10 won 34% of FY2021 NAICS 333996 contract dollars

Contract obligations: $83,860,700 Net of deobligations, by contracts coded NAICS 333996
Contractors: 542 Parent companies with an obligation
Largest contractor: Warren Pumps LLC $7.73 million, 8.7% 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	Warren Pumps LLC Through Circor Naval Solutions LLC Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$7,733,106	8.7%	Rank history: #1 in FY2022 and not on the FY2023–FY2025 lists; unchanged since FY2020.
2	Carver Pump Company Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$4,233,372	4.8%	Rank history: #3 in FY2022, #4 in FY2023, not on the FY2024 list and #14 in FY2025; unchanged since FY2020.
3	Science Applications International Corporation Through Asrc Federal Facilities Logistics, LLC Top agencies DLA (Defense Logistics Agency)	$4,171,333	4.7%	Rank history: #7 in FY2022, #6 in FY2023, #55 in FY2024 and not on the FY2025 list; unchanged since FY2020.
4	Crane Co 3 awardees, including Crane Pumps & Systems PFT Corp and Hydro-Aire Aerospace Corp. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$2,360,793	2.7%	Rank history: #93 in FY2022, #30 in FY2023 and not on the FY2024–FY2025 lists; up 4 since FY2020.
5	Scott Industrial Systems, Inc. Top agencies DLA (Defense Logistics Agency)	$2,205,190	2.5%	Rank history: #28 in FY2022, #12 in FY2023, #16 in FY2024 and #15 in FY2025; up 56 since FY2020.
6	Thomas Instrument, Incorporated Top agencies DLA (Defense Logistics Agency)	$2,174,669	2.5%	Rank history: not on the FY2022–FY2024 lists and #32 in FY2025; new, not ranked in FY2020.
7	All-Safe Inc. Top agencies DLA (Defense Logistics Agency)	$1,929,676	2.2%	Rank history: #17 in FY2022, #13 in FY2023, #15 in FY2024 and #12 in FY2025; down 1 since FY2020.
8	Ampco-Pittsburgh Corporation Through Air & Liquid Systems Corporation Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$1,827,952	2.1%	Rank history: #26 in FY2022 and not on the FY2023–FY2025 lists; up 9 since FY2020.
9	R P M Supply Corporation Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$1,635,513	1.8%	Rank history: #2 in FY2022, #7 in FY2023, #6 in FY2024 and #5 in FY2025; up 5 since FY2020.
10	Chant Engineering Co Inc. Top agencies Navy (Department of the Navy)	$1,599,139	1.8%	Rank history: not on the FY2022–FY2024 lists and #35 in FY2025; new, not ranked in FY2020.
11	Gardner Denver Nash LLC Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$1,555,711	1.8%	Rank history: #90 in FY2022 and not on the FY2023–FY2025 lists; down 4 since FY2020.
12	Dover Corporation Through Dover Pumps & Process Solutions Segment Inc. Top agencies Navy (Department of the Navy)	$1,513,145	1.7%	Rank history: #12 in FY2022, #20 in FY2023 and not on the FY2024–FY2025 lists; up 299 since FY2020.
13	Phoenix Trading Inc. Top agencies DLA (Defense Logistics Agency)	$1,394,331	1.6%	Rank history: #22 in FY2022, #22 in FY2023, #14 in FY2024 and #11 in FY2025; down 1 since FY2020.
14	Pioneer Industries, LLC Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$1,342,037	1.5%	Rank history: #15 in FY2022, #26 in FY2023, #34 in FY2024 and #23 in FY2025; down 1 since FY2020.
15	Heico Aerospace Corporat 2 awardees, including Rocky Mountain Hydrostatics, LLC and Seal Dynamics LLC Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$1,221,426	1.4%	Rank history: #35 in FY2022 and not on the FY2023–FY2025 lists; up 70 since FY2020.
16	Colonna's Shipyard West, LLC Top agencies Navy (Department of the Navy)	$1,189,650	1.3%	Rank history: #20 in FY2022, #31 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
17	Triad Technologies LLC Top agencies DLA (Defense Logistics Agency)	$1,183,636	1.3%	Rank history: not on the FY2022 list, #41 in FY2023, #37 in FY2024 and not on the FY2025 list; up 4 since FY2020.
18	Dreamfind, Inc. Top agencies DLA (Defense Logistics Agency)	$1,160,739	1.3%	Rank history: #14 in FY2022, #15 in FY2023, #10 in FY2024 and #19 in FY2025; down 2 since FY2020.
19	Aqua-Chem, Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$1,007,495	1.1%	Rank history: #21 in FY2022 and not on the FY2023–FY2025 lists; up 14 since FY2020.
20	Fountainhead Group Inc. Top agencies DLA (Defense Logistics Agency)	$980,833	1.1%	Rank history: #53 in FY2022, not on the FY2023–FY2024 lists and #17 in FY2025; up 45 since FY2020.
21	Meggitt PLC Through Meggitt Defense Systems, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$970,020	1.1%	Rank history: #99 in FY2022 and not on the FY2023–FY2025 lists; up 21 since FY2020.
22	Waterax Corporation Top agencies DLA (Defense Logistics Agency)	$948,425	1.1%	Rank history: #10 in FY2022 and not on the FY2023–FY2025 lists; up 127 since FY2020.
23	Colfax Corporation Through IMO Industries Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$821,919	0.9%	Rank history: #9 in FY2022, #2 in FY2023, #1 in FY2024 and not on the FY2025 list; up 35 since FY2020.
24	Oshkosh Corp 2 awardees, including Oshkosh Defense LLC and JLG Industries, Inc. Top agencies DLA (Defense Logistics Agency)	$820,269	0.9%	Rank history: not on the FY2022–FY2025 lists; up 38 since FY2020.
25	Dutch Valley Supply Co. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$786,551	0.9%	Rank history: #40 in FY2022, #34 in FY2023, #30 in FY2024 and #31 in FY2025; up 32 since FY2020.
26	Kampi Components Co Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) Army (Department of the Army)	$770,074	0.9%	Rank history: #18 in FY2022, #18 in FY2023, #19 in FY2024 and #22 in FY2025; down 15 since FY2020.
27	Acme Products & Engineering Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$761,061	0.9%	Rank history: #52 in FY2022, not on the FY2023 list, #35 in FY2024 and #18 in FY2025; up 19 since FY2020.
28	L3Harris Technologies, Inc. 6 awardees, including L3 Technologies, Inc., L3Harris Maritime Power & Energy Solutions, Inc. and CAE USA Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$744,379	0.8%	Rank history: #30 in FY2022, #19 in FY2023, #79 in FY2024 and not on the FY2025 list; up 65 since FY2020.
29	Jamaica Bearings Co., Inc. 2 awardees Top agencies DLA (Defense Logistics Agency)	$722,994	0.8%	Rank history: #42 in FY2022, #46 in FY2023, #71 in FY2024 and #50 in FY2025; down 24 since FY2020.
30	Statz Corp Top agencies DLA (Defense Logistics Agency)	$679,628	0.8%	Rank history: #38 in FY2022, #81 in FY2023 and not on the FY2024–FY2025 lists; up 13 since FY2020.
31	Rex Systems Incorporated Top agencies Navy (Department of the Navy)	$675,000	0.8%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
32	Curtiss-Wright Corporation 4 awardees, including Curtiss-Wright Electro-Mechanical Corp Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$611,407	0.7%	Rank history: #4 in FY2022, #11 in FY2023 and not on the FY2024–FY2025 lists; down 28 since FY2020.
33	Federal Resources Supply Company Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$597,307	0.7%	Rank history: not on the FY2022 list, #96 in FY2023 and not on the FY2024–FY2025 lists; up 41 since FY2020.
34	Global Logistics Strategies Inc. Top agencies DLA (Defense Logistics Agency)	$562,239	0.6%	Rank history: #54 in FY2022, #47 in FY2023, not on the FY2024 list and #78 in FY2025; up 47 since FY2020.
35	Eaton Corporation 3 awardees, including Eaton Aerospace, LLC Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$557,092	0.6%	Rank history: not on the FY2022 list, #17 in FY2023 and not on the FY2024–FY2025 lists; up 18 since FY2020.
36	Bromine Systems Inc. Top agencies DLA (Defense Logistics Agency)	$516,354	0.6%	Rank history: not on the FY2022–FY2025 lists; up 19 since FY2020.
37	Linmarr Associates, Inc. Top agencies DLA (Defense Logistics Agency)	$512,112	0.6%	Rank history: #46 in FY2022, not on the FY2023 list, #58 in FY2024 and #39 in FY2025; down 15 since FY2020.
38	Rolls-Royce Military Aero Engines Ltd 2 awardees, including Rolls-Royce Marine North America Inc. and Rolls-Royce Solutions America Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$511,710	0.6%	Rank history: #36 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
39	PCX Inc. Top agencies DLA (Defense Logistics Agency)	$510,012	0.6%	Rank history: #84 in FY2022 and not on the FY2023–FY2025 lists; up 17 since FY2020.
40	ECI Defense Group, Inc. Top agencies DLA (Defense Logistics Agency)	$502,313	0.6%	Rank history: #5 in FY2022, #3 in FY2023, #3 in FY2024 and #7 in FY2025; down 11 since FY2020.
41	Hydraulics International, Inc. Top agencies DLA (Defense Logistics Agency)	$488,917	0.6%	Rank history: #45 in FY2022, #99 in FY2023, #22 in FY2024 and #34 in FY2025; down 5 since FY2020.
42	S I T Corporation Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) DHS (Department of Homeland Security)	$460,616	0.5%	Rank history: #74 in FY2022, #44 in FY2023, #21 in FY2024 and #21 in FY2025; down 8 since FY2020.
43	Sarco Inc. Top agencies DLA (Defense Logistics Agency)	$460,148	0.5%	Rank history: #71 in FY2022, #56 in FY2023, #41 in FY2024 and #47 in FY2025; up 67 since FY2020.
44	Advanced Test Equipment Corporation Top agencies Navy (Department of the Navy)	$456,855	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
45	Integrated Procurement Technologies Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$455,472	0.5%	Rank history: not on the FY2022–FY2025 lists; up 182 since FY2020.
46	Echelon Supply and Service, Inc. Top agencies DLA (Defense Logistics Agency)	$440,612	0.5%	Rank history: #60 in FY2022, #58 in FY2023 and not on the FY2024–FY2025 lists; down 21 since FY2020.
47	Jgils, LLC Top agencies DLA (Defense Logistics Agency)	$400,691	0.5%	Rank history: #77 in FY2022, #16 in FY2023, #17 in FY2024 and #52 in FY2025; down 12 since FY2020.
48	Brake Supply Company, Inc. Top agencies DLA (Defense Logistics Agency)	$398,537	0.5%	Rank history: #88 in FY2022, not on the FY2023 list, #59 in FY2024 and not on the FY2025 list; up 48 since FY2020.
49	Cascade Pump Company Top agencies DOI (Department of the Interior)	$394,974	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
50	Metadure Parts & Sales, Inc. Top agencies DLA (Defense Logistics Agency)	$393,163	0.4%	Rank history: #59 in FY2022, #54 in FY2023, #27 in FY2024 and not on the FY2025 list; up 154 since FY2020.
51	Service & Sales Inc. Top agencies DLA (Defense Logistics Agency)	$353,223	0.4%	Rank history: #100 in FY2022 and not on the FY2023–FY2025 lists; up 41 since FY2020.
52	Bestek Industries Inc. Top agencies DLA (Defense Logistics Agency)	$344,881	0.4%	Rank history: #50 in FY2022, #86 in FY2023, #45 in FY2024 and #72 in FY2025; up 90 since FY2020.
53	Mcnally Industries LLC Top agencies Navy (Department of the Navy)	$343,149	0.4%	Rank history: not on the FY2022 list, #14 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
54	Allied Marine Services LLC 2 awardees, including Environmental Systems LLC Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$340,087	0.4%	Rank history: #62 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
55	Ohs Inc. Top agencies DLA (Defense Logistics Agency)	$326,680	0.4%	Rank history: #81 in FY2022 and not on the FY2023–FY2025 lists; up 11 since FY2020.
56	Lynn Electronics LLC Top agencies DLA (Defense Logistics Agency)	$322,838	0.4%	Rank history: not on the FY2022–FY2025 lists; up 70 since FY2020.
57	Trycon Enterprises, L.L.C. Top agencies Army (Department of the Army) Navy (Department of the Navy)	$315,092	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
58	Oilgear Company the Top agencies Army (Department of the Army)	$310,002	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
59	Ruta Supplies Inc. Top agencies DLA (Defense Logistics Agency)	$299,447	0.3%	Rank history: #33 in FY2022, not on the FY2023 list, #78 in FY2024 and #53 in FY2025; down 36 since FY2020.
60	Esco Technologies Inc. Through Vacco Industries Top agencies Navy (Department of the Navy)	$294,100	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
61	Sims Pump Valve Co, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$291,286	0.3%	Rank history: #76 in FY2022, #89 in FY2023, #32 in FY2024 and #27 in FY2025; down 7 since FY2020.
62	Fairbanks Morse LLC 2 awardees Top agencies Navy (Department of the Navy)	$290,681	0.3%	Rank history: #65 in FY2022, #28 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
63	Brighton Cromwell LLC Top agencies DLA (Defense Logistics Agency)	$287,886	0.3%	Rank history: not on the FY2022–FY2025 lists; down 14 since FY2020.
64	Hydro Engineering Inc. Top agencies DLA (Defense Logistics Agency)	$284,035	0.3%	Rank history: #34 in FY2022 and not on the FY2023–FY2025 lists; down 38 since FY2020.
65	Ohio Machinery Co Top agencies DLA (Defense Logistics Agency)	$269,500	0.3%	Rank history: #48 in FY2022, not on the FY2023 list, #64 in FY2024 and not on the FY2025 list; up 70 since FY2020.
66	Gigli Enterprises, Inc. Top agencies DLA (Defense Logistics Agency)	$269,179	0.3%	Rank history: not on the FY2022 list, #92 in FY2023 and not on the FY2024–FY2025 lists; down 2 since FY2020.
67	General Dynamics Mission Systems, Inc. Top agencies Navy (Department of the Navy)	$269,108	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
68	J & N Marketing, Inc. Top agencies DOI (Department of the Interior)	$253,263	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
69	Janels Industries Inc. Top agencies DLA (Defense Logistics Agency)	$249,831	0.3%	Rank history: #70 in FY2022, #84 in FY2023, #77 in FY2024 and not on the FY2025 list; up 131 since FY2020.
70	Ray Blackman Enterprises, Inc. Top agencies DLA (Defense Logistics Agency)	$245,236	0.3%	Rank history: #80 in FY2022, #60 in FY2023, #65 in FY2024 and #44 in FY2025; down 38 since FY2020.
71	RGI Inc. Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$232,856	0.3%	Rank history: not on the FY2022–FY2023 lists, #56 in FY2024 and #33 in FY2025; up 13 since FY2020.
72	Dredgemasters International, Inc. Top agencies Army (Department of the Army)	$229,526	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
73	Bogue Systems Inc. Top agencies Navy (Department of the Navy)	$224,640	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
74	Cobham Advanced Electronic Solutions Inc. 2 awardees, including Mission Systems Davenport Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$222,900	0.3%	Rank history: not on the FY2022–FY2025 lists; up 65 since FY2020.
75	Johnson Controls Security Solutions LLC Through Johnson Controls Navy Systems, LLC Top agencies DLA (Defense Logistics Agency)	$219,298	0.2%	Rank history: not on the FY2022 list, #79 in FY2023 and not on the FY2024–FY2025 lists; up 13 since FY2020.
76	Wess-Del Incorporated Top agencies DLA (Defense Logistics Agency)	$217,042	0.2%	Rank history: not on the FY2022–FY2025 lists; up 18 since FY2020.
77	Lake Shore Systems, Inc. 2 awardees Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$213,200	0.2%	Rank history: not on the FY2022–FY2023 lists, #97 in FY2024 and not on the FY2025 list; down 18 since FY2020.
78	Triman Industries Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$211,910	0.2%	Rank history: #37 in FY2022, #43 in FY2023, #11 in FY2024 and #13 in FY2025; up 60 since FY2020.
79	Noresco LLC Through Kidde Technologies, Inc. Top agencies Navy (Department of the Navy)	$211,275	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
80	Specialty Seals & Accessories, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$210,643	0.2%	Rank history: not on the FY2022–FY2023 lists, #68 in FY2024 and not on the FY2025 list; up 67 since FY2020.
81	EOS Inc. 2 awardees, including Sidecar Enterprises Inc. Top agencies DLA (Defense Logistics Agency)	$205,794	0.2%	Rank history: not on the FY2022–FY2025 lists; up 204 since FY2020.
82	Zemarc Corporation Top agencies DLA (Defense Logistics Agency)	$193,600	0.2%	Rank history: #92 in FY2022, not on the FY2023 list, #46 in FY2024 and not on the FY2025 list; down 10 since FY2020.
83	Facet (Oklahoma) LLC Top agencies Navy (Department of the Navy)	$190,210	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
84	Smiths Group PLC Through John Crane, Inc. Top agencies DLA (Defense Logistics Agency)	$190,051	0.2%	Rank history: #51 in FY2022 and not on the FY2023–FY2025 lists; down 34 since FY2020.
85	Karl Senner, L.L.C. Top agencies Navy (Department of the Navy)	$189,121	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
86	Derbyshire Machine & Tool Co Top agencies DLA (Defense Logistics Agency)	$187,093	0.2%	Rank history: not on the FY2022–FY2023 lists, #49 in FY2024 and not on the FY2025 list; up 28 since FY2020.
87	Ross Development Inc. Top agencies DLA (Defense Logistics Agency)	$186,693	0.2%	Rank history: #68 in FY2022 and not on the FY2023–FY2025 lists; down 8 since FY2020.
88	Rps-Fl, Inc. Top agencies DLA (Defense Logistics Agency)	$184,716	0.2%	Rank history: not on the FY2022–FY2025 lists; up 21 since FY2020.
89	Leidos Holdings, Inc. Through Leidos, Inc. Top agencies Navy (Department of the Navy)	$179,448	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
90	RTX Corporation 4 awardees, including Raytheon Company and Hamilton Sundstrand Corporation Top agencies Navy (Department of the Navy)	$176,986	0.2%	Rank history: #43 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
91	Dela Technology Corporation Top agencies DLA (Defense Logistics Agency)	$175,241	0.2%	Rank history: not on the FY2022–FY2024 lists and #60 in FY2025; down 53 since FY2020.
92	Aarcorp Through AAR Supply Chain, Inc. Top agencies DLA (Defense Logistics Agency)	$171,019	0.2%	Rank history: #24 in FY2022 and not on the FY2023–FY2025 lists; down 32 since FY2020.
93	B & H International LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) DOI (Department of the Interior)	$170,243	0.2%	Rank history: not on the FY2022–FY2025 lists; up 312 since FY2020.
94	Jag Components, LLC Top agencies DLA (Defense Logistics Agency)	$168,674	0.2%	Rank history: not on the FY2022–FY2023 lists, #67 in FY2024 and #89 in FY2025; up 297 since FY2020.
95	Vanport Marine, Inc. Top agencies Army (Department of the Army)	$168,445	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
96	Flodraulic Group Inc. Through Nahi LLC Top agencies Navy (Department of the Navy)	$168,125	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
97	Filter Products Corporation Top agencies DLA (Defense Logistics Agency)	$167,713	0.2%	Rank history: not on the FY2022–FY2025 lists; up 77 since FY2020.
98	Larkos Packing and Distribution Inc. Top agencies DLA (Defense Logistics Agency)	$156,492	0.2%	Rank history: not on the FY2022–FY2023 lists, #54 in FY2024 and #29 in FY2025; up 21 since FY2020.
99	Holmatro Inc Top agencies Army (Department of the Army)	$156,347	0.2%	Rank history: not on the FY2022–FY2025 lists; down 24 since FY2020.
100	Service Pump & Supply Co Inc. Top agencies DLA (Defense Logistics Agency) Army (Department of the Army)	$155,932	0.2%	Rank history: #31 in FY2022, #88 in FY2023, #57 in FY2024 and not on the FY2025 list; up 66 since FY2020.

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100 of 542 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 $88.5 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 NAICS 333996 contractors in FY2021?

1. Warren Pumps LLC ($7.73M), 2. Carver Pump Company ($4.23M), 3. Science Applications International Corporation ($4.17M), 4. Crane Co ($2.36M), 5. Scott Industrial Systems, Inc. ($2.21M), 6. Thomas Instrument, Incorporated ($2.17M), 7. All-Safe Inc. ($1.93M), 8. Ampco-Pittsburgh Corporation ($1.83M), 9. R P M Supply Corporation ($1.64M), 10. Chant Engineering Co Inc. ($1.6M).

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