Top 100 Contractors in NAICS 3251: Basic Chemical Manufacturing, FY2024

Name: Top 100 Contractors in NAICS 3251: Basic Chemical Manufacturing, FY2024
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2023 – Sep 30, 2024 Code page on GovTribe

The top 10 won 69% of FY2024 NAICS 3251 contract dollars

Contract obligations: $558,310,111 Net of deobligations, by contracts coded NAICS 3251 or a code under it
Contractors: 530 Parent companies with an obligation
Largest contractor: Air Products and Chemicals, Inc. $134 million, 21.0% 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	Air Products and Chemicals, Inc. Top agencies NASA (National Aeronautics and Space Administration) DLA (Defense Logistics Agency) Navy (Department of the Navy)	$133,585,190	21.0%	Rank history: #2 in FY2021, #2 in FY2022, #1 in FY2023 and #2 in FY2025; unchanged since FY2023.
2	Mid-America Conversion Services, LLC Top agencies DOE (Department of Energy)	$131,041,286	20.6%	Rank history: #1 in FY2021, #1 in FY2022, #2 in FY2023 and #1 in FY2025; unchanged since FY2023.
3	BWX Technologies, Inc. 2 awardees, including Nuclear Fuel Services Inc. and Bwxt Nuclear Operations Group, Inc. Top agencies DOE (Department of Energy)	$74,041,448	11.6%	Rank history: not on the FY2021 list, #4 in FY2022, #3 in FY2023 and #3 in FY2025; unchanged since FY2023.
4	Lonza Walkersville Inc. Through Calca Solutions, LLC Top agencies DLA (Defense Logistics Agency)	$19,467,304	3.1%	Rank history: not on the FY2021–FY2023 lists and #21 in FY2025; new.
5	(Rc) 2 Pharma Connect L.L.C. Top agencies DLA (Defense Logistics Agency)	$16,793,122	2.6%	Rank history: not on the FY2021–FY2022 lists, #12 in FY2023 and #11 in FY2025; up 7 since FY2023.
6	Specialized Materials and Chemicals, LLC Top agencies Army (Department of the Army)	$14,475,240	2.3%	Rank history: not on the FY2021–FY2022 lists, #11 in FY2023 and #25 in FY2025; up 5 since FY2023.
7	MP Materials Corp. Through MP Mine Operations LLC Top agencies DLA (Defense Logistics Agency)	$12,488,423	2.0%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
8	Messer North America Inc. 3 awardees, including Messer LLC, Linde GMBH and Linde Gas Espana, S.A. Top agencies NASA (National Aeronautics and Space Administration) DOI (Department of the Interior) DLA (Defense Logistics Agency)	$11,934,473	1.9%	Rank history: not on the FY2021–FY2023 lists and #7 in FY2025; new.
9	Linde LLC 3 awardees, including Messer LLC and Messer Gas Puerto Rico Inc. Top agencies NASA (National Aeronautics and Space Administration) DMEA (Defense Microelectronics Activity) DLA (Defense Logistics Agency)	$11,810,098	1.9%	Rank history: #7 in FY2021, #7 in FY2022, #5 in FY2023 and #14 in FY2025; down 4 since FY2023.
10	RAS Enterprises LLC Top agencies VA (Department of Veterans Affairs) DOE (Department of Energy) DHA (Defense Health Agency)	$11,174,112	1.8%	Rank history: #6 in FY2021, #9 in FY2022, #10 in FY2023 and #9 in FY2025; unchanged since FY2023.
11	Airgas USA LLC 12 awardees Top agencies DLA (Defense Logistics Agency) DHA (Defense Health Agency) VA (Department of Veterans Affairs)	$10,037,118	1.6%	Rank history: #76 in FY2021, not on the FY2022 list, #6 in FY2023 and #5 in FY2025; down 5 since FY2023.
12	RCG of North Carolina, LLC Top agencies VA (Department of Veterans Affairs) Commerce (Department of Commerce) DHA (Defense Health Agency)	$6,866,061	1.1%	Rank history: #23 in FY2021, #14 in FY2022, #13 in FY2023 and #12 in FY2025; up 1 since FY2023.
13	Mitsubishi Chemical Holdings Corporation 3 awardees, including Nippon Sanso Matheson, Inc., Nippon Sanso Deutschland GMBH and Matheson Tri-Gas, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) NASA (National Aeronautics and Space Administration)	$4,637,849	0.7%	Rank history: not on the FY2021–FY2022 lists, #25 in FY2023 and #20 in FY2025; up 12 since FY2023.
14	Lyten, Inc. Top agencies Navy (Department of the Navy)	$4,325,007	0.7%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
15	Chemicals Incorporated Top agencies MDA (DOD Missile Defense Agency)	$3,928,400	0.6%	Rank history: not on the FY2021–FY2022 lists, #35 in FY2023 and not on the FY2025 list; up 20 since FY2023.
16	Maryland Chemical Company, Inc. Top agencies Navy (Department of the Navy)	$3,715,680	0.6%	Rank history: not on the FY2021–FY2022 lists, #92 in FY2023 and #53 in FY2025; up 76 since FY2023.
17	Paula F Price Enterprises LLC 2 awardees Top agencies VA (Department of Veterans Affairs) Army (Department of the Army) DHA (Defense Health Agency)	$3,518,850	0.6%	Rank history: not on the FY2021 list, #13 in FY2022, #18 in FY2023 and #15 in FY2025; up 1 since FY2023.
18	Praxair Distribution Inc. 9 awardees, including Linde Inc., Linde Gas & Equipment Inc. and Linde Gas Espana, S.A. Top agencies NASA (National Aeronautics and Space Administration) DLA (Defense Logistics Agency) DHA (Defense Health Agency)	$3,200,300	0.5%	Rank history: #4 in FY2021, #3 in FY2022, not on the FY2023 list and not on the FY2025 list; returned.
19	Leland Limited Inc. Top agencies DLA (Defense Logistics Agency)	$2,889,563	0.5%	Rank history: #87 in FY2021, #61 in FY2022, not on the FY2023 list and #88 in FY2025; up 408 since FY2023.
20	Kuehne Chemical Company, Inc. Top agencies Army (Department of the Army)	$2,520,300	0.4%	Rank history: #14 in FY2021, #18 in FY2022, #26 in FY2023 and #30 in FY2025; up 6 since FY2023.
21	Dixie Chemical Company, Inc. Top agencies DLA (Defense Logistics Agency)	$2,288,967	0.4%	Rank history: #16 in FY2021, #27 in FY2022, #14 in FY2023 and not on the FY2025 list; down 7 since FY2023.
22	Roberts Oxygen Company Inc. Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs) USDA (Department of Agriculture)	$2,248,316	0.4%	Rank history: #25 in FY2021, #30 in FY2022, #29 in FY2023 and #26 in FY2025; up 7 since FY2023.
23	Amerochem Corporation Top agencies Navy (Department of the Navy)	$2,187,322	0.3%	Rank history: #26 in FY2021, #24 in FY2022, #28 in FY2023 and #41 in FY2025; up 5 since FY2023.
24	Shilog, Ltd Top agencies Army (Department of the Army) IBWC (International Boundary and Water Commission U.S.-Mexico)	$1,797,317	0.3%	Rank history: not on the FY2021–FY2022 lists, #42 in FY2023 and #70 in FY2025; up 18 since FY2023.
25	CF Industries Holdings Inc. Through CF Industries Nitrogen LLC Top agencies DLA (Defense Logistics Agency)	$1,730,806	0.3%	Rank history: #11 in FY2021, #5 in FY2022, #17 in FY2023 and not on the FY2025 list; down 8 since FY2023.
26	Lonza Group AG 2 awardees, including Calca Solutions, LLC and Lonza LLC Top agencies DLA (Defense Logistics Agency) Treasury (Department of the Treasury)	$1,705,725	0.3%	Rank history: #8 in FY2021, #15 in FY2022, #4 in FY2023 and not on the FY2025 list; down 22 since FY2023.
27	Gryphon Technologies L.C. Through American Pacific Corporation Top agencies Navy (Department of the Navy)	$1,638,677	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
28	City Chemical LLC Top agencies Navy (Department of the Navy)	$1,629,928	0.3%	Rank history: #33 in FY2021, #35 in FY2022, #38 in FY2023 and #33 in FY2025; up 10 since FY2023.
29	Green Lantern, LLC Top agencies DHA (Defense Health Agency) HHS (Department of Health and Human Services) DLA (Defense Logistics Agency)	$1,576,399	0.2%	Rank history: #17 in FY2021, #19 in FY2022, #30 in FY2023 and #31 in FY2025; up 1 since FY2023.
30	Inchcape Shipping Services Dubai LLC Top agencies DLA (Defense Logistics Agency)	$1,359,438	0.2%	Rank history: #18 in FY2021, #25 in FY2022, #40 in FY2023 and #37 in FY2025; up 10 since FY2023.
31	Titan International, Inc. Top agencies Navy (Department of the Navy)	$1,260,838	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
32	CF Industries Nitrogen LLC Top agencies DLA (Defense Logistics Agency)	$1,259,701	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
33	Linde Gas & Equipment Inc. Top agencies Navy (Department of the Navy) HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$1,210,337	0.2%	Rank history: not on the FY2021–FY2023 lists and #23 in FY2025; new.
34	North American Refrigerants Inc. Top agencies NASA (National Aeronautics and Space Administration)	$1,123,953	0.2%	Rank history: #48 in FY2021, not on the FY2022 list, #71 in FY2023 and not on the FY2025 list; up 37 since FY2023.
35	Carus LLC Top agencies Army (Department of the Army)	$1,119,330	0.2%	Rank history: #34 in FY2021, #34 in FY2022, #76 in FY2023 and #59 in FY2025; up 41 since FY2023.
36	Matheson TRI-Gas Inc. 2 awardees, including Nippon Sanso Matheson, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) EPA (Environmental Protection Agency)	$1,076,406	0.2%	Rank history: not on the FY2021–FY2023 lists and #22 in FY2025; new.
37	DPA Investments Inc. Through Usalco, LLC Top agencies Army (Department of the Army)	$1,064,263	0.2%	Rank history: #19 in FY2021, #16 in FY2022, #23 in FY2023 and not on the FY2025 list; down 14 since FY2023.
38	Usalco, LLC Top agencies Army (Department of the Army)	$1,019,371	0.2%	Rank history: not on the FY2021–FY2023 lists and #24 in FY2025; new.
39	Resintech Inc. Top agencies Navy (Department of the Navy)	$987,811	0.2%	Rank history: #22 in FY2021, #31 in FY2022, #27 in FY2023 and #47 in FY2025; down 12 since FY2023.
40	ROY Smith Company Top agencies Army (Department of the Army)	$954,578	0.1%	Rank history: #28 in FY2021, not on the FY2022 list, #24 in FY2023 and #38 in FY2025; down 16 since FY2023.
41	Strategic Consulting Alliances, LLC Top agencies Army (Department of the Army)	$937,658	0.1%	Rank history: #46 in FY2021, not on the FY2022 list, #52 in FY2023 and #62 in FY2025; up 11 since FY2023.
42	Medical Equipment & Supplies of America LLC Top agencies VA (Department of Veterans Affairs) Commerce (Department of Commerce)	$884,327	0.1%	Rank history: #41 in FY2021, #33 in FY2022, #48 in FY2023 and #36 in FY2025; up 6 since FY2023.
43	Goodrich Gas Inc. Top agencies Army (Department of the Army)	$852,836	0.1%	Rank history: #29 in FY2021, #22 in FY2022, #33 in FY2023 and #44 in FY2025; down 10 since FY2023.
44	S. J. Smith Co. Inc. Through S.j. Smith Co., Inc. Top agencies Army (Department of the Army)	$827,407	0.1%	Rank history: not on the FY2021–FY2023 lists and #42 in FY2025; new.
45	Sae Manufacturing Specialties Corp. Top agencies Army (Department of the Army)	$806,950	0.1%	Rank history: not on the FY2021–FY2023 lists and #46 in FY2025; new.
46	Aurorium LLC Top agencies Navy (Department of the Navy)	$799,948	0.1%	Rank history: not on the FY2021–FY2023 lists and #52 in FY2025; new.
47	Nexair LLC Top agencies Army (Department of the Army) HHS (Department of Health and Human Services) DHA (Defense Health Agency)	$789,765	0.1%	Rank history: #47 in FY2021, #58 in FY2022, #61 in FY2023 and #64 in FY2025; up 14 since FY2023.
48	Oerlikon Metco (US) Inc. Top agencies USAF (Department of the Air Force)	$786,264	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
49	Island Pyrochemical Industries Corp Top agencies Army (Department of the Army)	$784,960	0.1%	Rank history: not on the FY2021–FY2022 lists, #81 in FY2023 and #58 in FY2025; up 32 since FY2023.
50	Stripes Global, Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$775,072	0.1%	Rank history: #51 in FY2021, not on the FY2022 list, #67 in FY2023 and #56 in FY2025; up 17 since FY2023.
51	Metalcraft, Inc. Top agencies DLA (Defense Logistics Agency)	$759,964	0.1%	Rank history: not on the FY2021–FY2022 lists, #91 in FY2023 and not on the FY2025 list; up 40 since FY2023.
52	Marianas Gas Corp Top agencies DLA (Defense Logistics Agency)	$752,641	0.1%	Rank history: #37 in FY2021, #45 in FY2022, #41 in FY2023 and #43 in FY2025; down 11 since FY2023.
53	Momar, Incorporated Top agencies IBWC (International Boundary and Water Commission U.S.-Mexico)	$751,013	0.1%	Rank history: not on the FY2021 list, #54 in FY2022, #58 in FY2023 and not on the FY2025 list; up 5 since FY2023.
54	Merrimac Petroleum, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$738,926	0.1%	Rank history: #39 in FY2021, #42 in FY2022, #51 in FY2023 and #95 in FY2025; down 3 since FY2023.
55	Powder Alloy Corporation Top agencies USAF (Department of the Air Force)	$679,945	0.1%	Rank history: #66 in FY2021, not on the FY2022 list, #74 in FY2023 and not on the FY2025 list; up 19 since FY2023.
56	Chase Supply, Inc. Top agencies Navy (Department of the Navy)	$662,843	0.1%	Rank history: not on the FY2021–FY2022 lists, #69 in FY2023 and not on the FY2025 list; up 13 since FY2023.
57	Dubois Chemicals Inc. Top agencies Army (Department of the Army)	$657,689	0.1%	Rank history: #44 in FY2021, #43 in FY2022, not on the FY2023 list and not on the FY2025 list; returned.
58	Hudson Technologies, Inc. 2 awardees Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$640,761	0.1%	Rank history: not on the FY2021 list, #44 in FY2022, #47 in FY2023 and #8 in FY2025; down 11 since FY2023.
59	Nation Ford Chemical Co Top agencies Army (Department of the Army)	$625,172	0.1%	Rank history: #24 in FY2021, not on the FY2022 list, #16 in FY2023 and #17 in FY2025; down 43 since FY2023.
60	Gasochem International, Llc. Top agencies Army (Department of the Army) Commerce (Department of Commerce) USDA (Department of Agriculture)	$615,410	0.1%	Rank history: #61 in FY2021, not on the FY2022–FY2023 lists and #67 in FY2025; up 70 since FY2023.
61	The Gas Company, LLC Top agencies Navy (Department of the Navy)	$612,146	0.1%	Rank history: #35 in FY2021, #26 in FY2022, #32 in FY2023 and not on the FY2025 list; down 29 since FY2023.
62	Showa Chemical Industry Co.,Ltd. Top agencies Navy (Department of the Navy)	$606,214	0.1%	Rank history: not on the FY2021 list, #67 in FY2022, #55 in FY2023 and #55 in FY2025; down 7 since FY2023.
63	Mcgean-Rohco, Inc. Top agencies USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$600,132	0.1%	Rank history: not on the FY2021–FY2023 lists and #48 in FY2025; new.
64	Tangram Chemical LLC Top agencies Navy (Department of the Navy)	$598,293	0.1%	Rank history: #36 in FY2021, #28 in FY2022, #34 in FY2023 and #51 in FY2025; down 30 since FY2023.
65	Global Gases Group FZE Top agencies DLA (Defense Logistics Agency)	$593,945	0.1%	Rank history: #20 in FY2021, #17 in FY2022, #21 in FY2023 and #27 in FY2025; down 44 since FY2023.
66	Government Scientific Source Inc. Top agencies HHS (Department of Health and Human Services) Navy (Department of the Navy) DLA (Defense Logistics Agency)	$579,053	0.1%	Rank history: #42 in FY2021, #62 in FY2022, #43 in FY2023 and #86 in FY2025; down 23 since FY2023.
67	Airgas Inc. 4 awardees, including Airgas Carbonic, Inc., Air Liquide Italia Service S.R.L. and Sociedade Portuguesa Do Ar Líquido Arlíquido, LDA Top agencies DLA (Defense Logistics Agency) USAF (Department of the Air Force)	$574,216	0.1%	Rank history: #5 in FY2021, #6 in FY2022, #20 in FY2023 and #93 in FY2025; down 47 since FY2023.
68	Danstar Ferment AG Top agencies HHS (Department of Health and Human Services)	$562,070	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
69	Johann Haltermann Ltd. Through Monument Chemical Houston LLC Top agencies DLA (Defense Logistics Agency)	$552,500	0.1%	Rank history: not on the FY2021–FY2022 lists, #36 in FY2023 and not on the FY2025 list; down 33 since FY2023.
70	Christopher I. Oyolokor SR. Top agencies Army (Department of the Army) Navy (Department of the Navy) DHA (Defense Health Agency)	$550,142	0.1%	Rank history: not on the FY2021 list, #48 in FY2022, #56 in FY2023 and #81 in FY2025; down 14 since FY2023.
71	The Warwick Supply and Equipment Co., Inc. Top agencies VA (Department of Veterans Affairs)	$529,164	0.1%	Rank history: not on the FY2021–FY2022 lists, #15 in FY2023 and #66 in FY2025; down 56 since FY2023.
72	Dynasty Chemical Corp Top agencies Army (Department of the Army)	$493,515	0.1%	Rank history: not on the FY2021–FY2023 lists and #54 in FY2025; new.
73	Linde Puerto Rico B.V. Top agencies DLA (Defense Logistics Agency) VA (Department of Veterans Affairs)	$476,136	0.1%	Rank history: not on the FY2021–FY2023 lists and #84 in FY2025; new.
74	Innovative Federal Operations Group, Incorporated Top agencies Army (Department of the Army) DHA (Defense Health Agency) VA (Department of Veterans Affairs)	$466,778	0.1%	Rank history: not on the FY2021–FY2022 lists, #94 in FY2023 and #89 in FY2025; up 20 since FY2023.
75	Mvation Worldwide, Inc. Top agencies Navy (Department of the Navy)	$463,272	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
76	Okano, K.K. Top agencies DLA (Defense Logistics Agency) DHA (Defense Health Agency)	$455,460	0.1%	Rank history: not on the FY2021–FY2022 lists, #89 in FY2023 and not on the FY2025 list; up 13 since FY2023.
77	Industrial Chemicals Corporation Top agencies DOI (Department of the Interior) Treasury (Department of the Treasury)	$449,034	0.1%	Rank history: #67 in FY2021, #53 in FY2022, #100 in FY2023 and not on the FY2025 list; up 23 since FY2023.
78	Water & Energy Systems Technology, Inc. Top agencies USAF (Department of the Air Force)	$441,823	0.1%	Rank history: not on the FY2021 list, #72 in FY2022, #68 in FY2023 and not on the FY2025 list; down 10 since FY2023.
79	Daiichi Bussan Co . Ltd Top agencies USAF (Department of the Air Force)	$425,067	0.1%	Rank history: #43 in FY2021, #50 in FY2022, #57 in FY2023 and not on the FY2025 list; down 22 since FY2023.
80	Berkshire Hathaway Inc. Through Pivotal Lng, LLC Top agencies NASA (National Aeronautics and Space Administration)	$419,191	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 68 since FY2023.
81	R & M Government Services Inc. Top agencies Army (Department of the Army) DHA (Defense Health Agency) VA (Department of Veterans Affairs)	$410,274	0.1%	Rank history: #32 in FY2021, #46 in FY2022, not on the FY2023 list and not on the FY2025 list; up 22 since FY2023.
82	Expert Depot S.R.L. Top agencies Navy (Department of the Navy)	$409,796	0.1%	Rank history: #49 in FY2021, #97 in FY2022, #87 in FY2023 and not on the FY2025 list; up 5 since FY2023.
83	Norco Inc. Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs) USDA (Department of Agriculture)	$401,751	0.1%	Rank history: #74 in FY2021, not on the FY2022 list, #73 in FY2023 and not on the FY2025 list; down 10 since FY2023.
84	Premier Trading Company, LLC Top agencies Army (Department of the Army)	$391,680	0.1%	Rank history: not on the FY2021–FY2022 lists, #63 in FY2023 and not on the FY2025 list; down 21 since FY2023.
85	NCA Solutions, LLC Top agencies Army (Department of the Army)	$387,200	0.1%	Rank history: not on the FY2021 list, #47 in FY2022, not on the FY2023 list and #100 in FY2025; up 47 since FY2023.
86	TMG Gases Inc. Top agencies Army (Department of the Army) Commerce (Department of Commerce) Navy (Department of the Navy)	$380,193	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
87	International Gas & Services Top agencies DLA (Defense Logistics Agency)	$367,428	0.1%	Rank history: #58 in FY2021, #60 in FY2022, #72 in FY2023 and #90 in FY2025; down 15 since FY2023.
88	Cerilliant Corporation 2 awardees, including Sigma-Aldrich, Inc. Top agencies Commerce (Department of Commerce) Army (Department of the Army) DHA (Defense Health Agency)	$365,954	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
89	BSE Performance, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army) HHS (Department of Health and Human Services)	$352,815	0.1%	Rank history: not on the FY2021 list, #78 in FY2022, #90 in FY2023 and not on the FY2025 list; up 1 since FY2023.
90	Intelligent Material Solutions, Inc. Top agencies Army (Department of the Army)	$350,000	0.1%	Rank history: #86 in FY2021, #37 in FY2022, #59 in FY2023 and not on the FY2025 list; down 31 since FY2023.
91	Cayman Chemical Co Inc. Top agencies DOJ (Department of Justice) DHA (Defense Health Agency)	$346,527	0.1%	Rank history: #59 in FY2021, #83 in FY2022, #77 in FY2023 and not on the FY2025 list; down 14 since FY2023.
92	Arc3 Gases, Inc. 2 awardees, including Arcet Equipment Co Top agencies DHS (Department of Homeland Security) Navy (Department of the Navy) DHA (Defense Health Agency)	$345,620	0.1%	Rank history: #70 in FY2021, #77 in FY2022, #85 in FY2023 and #94 in FY2025; down 7 since FY2023.
93	Scentry Biologicals, Inc. Top agencies USDA (Department of Agriculture)	$342,000	0.1%	Rank history: not on the FY2021–FY2022 lists, #66 in FY2023 and not on the FY2025 list; down 27 since FY2023.
94	Big Jet, LLC Top agencies Navy (Department of the Navy)	$341,396	0.1%	Rank history: not on the FY2021–FY2023 lists and #29 in FY2025; new.
95	Teledyne Technologies Incorporated Through Teledyne Flir Defense, LLC Top agencies DOT (Department of Transportation)	$339,863	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
96	Chuo Shoko Co., Ltd Top agencies Navy (Department of the Navy)	$334,072	0.1%	Rank history: #54 in FY2021, #59 in FY2022, #75 in FY2023 and not on the FY2025 list; down 21 since FY2023.
97	Gallup Welders Supply Inc. 2 awardees Top agencies HHS (Department of Health and Human Services) DOI (Department of the Interior)	$324,560	0.1%	Rank history: #93 in FY2021, #71 in FY2022, #88 in FY2023 and not on the FY2025 list; down 9 since FY2023.
98	BC Market Solutions LLC Top agencies Navy (Department of the Navy)	$317,696	<0.1%	Rank history: #98 in FY2021, not on the FY2022–FY2023 lists and not on the FY2025 list; up 20 since FY2023.
99	Hill Brothers Chemical Company Top agencies DOI (Department of the Interior)	$317,022	<0.1%	Rank history: #65 in FY2021, #92 in FY2022, #64 in FY2023 and #71 in FY2025; down 35 since FY2023.
100	One Speed Ventures LLC Top agencies DOI (Department of the Interior)	$314,940	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.

Show 75 more

100 of 530 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 3251

Code	Net obligations	Largest contractor
32518 Other Basic Inorganic Chemical Manufacturing	$269,175,308	Mid-America Conversion Services, LLC
32512 Industrial Gas Manufacturing	$260,673,089	Air Products and Chemicals, Inc.
32519 Other Basic Organic Chemical Manufacturing	$26,887,102	Lyten, Inc.
32511 Petrochemical Manufacturing	$485,645	A.M.S. Network LLC

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 $637 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 2024 ran Oct 1, 2023 – Sep 30, 2024. 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 FY2023. "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 FY2023 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 3251 contractors in FY2024?

1. Air Products and Chemicals, Inc. ($134M), 2. Mid-America Conversion Services, LLC ($131M), 3. BWX Technologies, Inc. ($74M), 4. Lonza Walkersville Inc. ($19.5M), 5. (Rc) 2 Pharma Connect L.L.C. ($16.8M), 6. Specialized Materials and Chemicals, LLC ($14.5M), 7. MP Materials Corp. ($12.5M), 8. Messer North America Inc. ($11.9M), 9. Linde LLC ($11.8M), 10. RAS Enterprises LLC ($11.2M).

On GovTribe

Research every contractor on this list

Every contract, task order and IDV they hold
Their subsidiaries, teammates and competitors
Open opportunities they're positioned for
Alerts when they win new work

Try for free Login