Top 100 Contractors in PSC 4420: Heat Exchangers and Steam Condensers, Jul 2025–Jun 2026

Name: Top 100 Contractors in PSC 4420: Heat Exchangers and Steam Condensers, Jul 2025–Jun 2026
Creator: GovTribe

Parent companies by net contract obligations Jul 1, 2025 – Jun 30, 2026 Code page on GovTribe

The top 10 won 67% of PSC 4420 contract dollars from July 2025 through June 2026

Contract obligations: $46,507,561 Net of deobligations, by contracts coded PSC 4420
Contractors: 134 Parent companies with an obligation
Largest contractor: ECI Defense Group, Inc. $8.41 million, 17.2% 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	ECI Defense Group, Inc. 2 awardees Top agencies DLA (Defense Logistics Agency)	$8,407,671	17.2%	Rank history: not on the FY2021–FY2022 lists, #30 in FY2023, #11 in FY2024 and #1 in FY2025; up 7 since Jul 2024–Jun 2025.
2	Aqua-Chem, Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$7,633,702	15.6%	Rank history: #2 in FY2021, #2 in FY2022, #3 in FY2023, #3 in FY2024 and #4 in FY2025; up 1 since Jul 2024–Jun 2025.
3	Arctic Slope Regional Corporation Through Asrc Federal Facilities Logistics LLC Top agencies Navy (Department of the Navy)	$4,257,350	8.7%	Rank history: not on the FY2021–FY2024 lists and #2 in FY2025; new, not ranked in Jul 2024–Jun 2025.
4	Chand, L.L.C. Top agencies DLA (Defense Logistics Agency)	$3,318,438	6.8%	Rank history: not on the FY2021–FY2023 lists, #19 in FY2024 and #50 in FY2025; up 41 since Jul 2024–Jun 2025.
5	Atlantic Diving Supply, Inc. Top agencies DLA (Defense Logistics Agency)	$2,414,153	4.9%	Rank history: not on the FY2021–FY2024 lists and #44 in FY2025; up 51 since Jul 2024–Jun 2025.
6	Jgils, LLC Top agencies DLA (Defense Logistics Agency)	$2,378,659	4.9%	Rank history: #7 in FY2021, #12 in FY2022, #4 in FY2023, #4 in FY2024 and #3 in FY2025; down 5 since Jul 2024–Jun 2025.
7	Argo Turboserve Corporation Top agencies DLA (Defense Logistics Agency)	$1,353,307	2.8%	Rank history: #12 in FY2021, #17 in FY2022, #5 in FY2023, #8 in FY2024 and #10 in FY2025; down 1 since Jul 2024–Jun 2025.
8	Mactaggart, Scott & Co. Ltd Top agencies DHS (Department of Homeland Security)	$1,029,780	2.1%	Rank history: not on the FY2021–FY2024 lists and #8 in FY2025; new, not ranked in Jul 2024–Jun 2025.
9	Renk Systems Corp Top agencies Navy (Department of the Navy)	$1,025,552	2.1%	Rank history: not on the FY2021–FY2023 lists, #1 in FY2024 and #11 in FY2025; up 1 since Jul 2024–Jun 2025.
10	Kampi Components Co Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$1,023,597	2.1%	Rank history: #4 in FY2021, #43 in FY2022, not on the FY2023 list, #18 in FY2024 and #21 in FY2025; up 28 since Jul 2024–Jun 2025.
11	H C Merchandisers, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$1,002,487	2.0%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
12	S I T Corporation Top agencies DLA (Defense Logistics Agency)	$979,636	2.0%	Rank history: #8 in FY2021, #31 in FY2022, #6 in FY2023, #10 in FY2024 and #31 in FY2025; up 20 since Jul 2024–Jun 2025.
13	Fluid Handling LLC 2 awardees Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security)	$912,613	1.9%	Rank history: not on the FY2021–FY2023 lists, #14 in FY2024 and #9 in FY2025; down 4 since Jul 2024–Jun 2025.
14	Pioneer Industries, LLC Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$706,725	1.4%	Rank history: #15 in FY2021, not on the FY2022 list, #26 in FY2023, #12 in FY2024 and #17 in FY2025; down 7 since Jul 2024–Jun 2025.
15	Par Defense Industries, LLC Top agencies DLA (Defense Logistics Agency)	$642,784	1.3%	Rank history: #47 in FY2021, #65 in FY2022, not on the FY2023–FY2024 lists and #22 in FY2025; up 7 since Jul 2024–Jun 2025.
16	Sogen Company, Inc. Top agencies DLA (Defense Logistics Agency)	$622,417	1.3%	Rank history: not on the FY2021–FY2023 lists, #68 in FY2024 and #59 in FY2025; up 27 since Jul 2024–Jun 2025.
17	Triman Industries Inc. Top agencies DLA (Defense Logistics Agency)	$564,091	1.2%	Rank history: #10 in FY2021, #33 in FY2022, #10 in FY2023, #70 in FY2024 and #33 in FY2025; up 30 since Jul 2024–Jun 2025.
18	Separator Spares & Equipment LLC Top agencies DLA (Defense Logistics Agency)	$563,120	1.2%	Rank history: not on the FY2021 list, #40 in FY2022, #38 in FY2023, #21 in FY2024 and #24 in FY2025; up 12 since Jul 2024–Jun 2025.
19	Phoenix Trading Inc. Top agencies DLA (Defense Logistics Agency)	$517,063	1.1%	Rank history: #11 in FY2021, #16 in FY2022, #21 in FY2023, #67 in FY2024 and #56 in FY2025; up 52 since Jul 2024–Jun 2025.
20	Marinette Marine Corporation Through Fincantieri Marine Systems North America, Inc. Top agencies DLA (Defense Logistics Agency)	$426,837	0.9%	Rank history: not on the FY2021–FY2023 lists, #36 in FY2024 and #99 in FY2025; up 76 since Jul 2024–Jun 2025.
21	Derbyshire Machine & Tool Co Top agencies DLA (Defense Logistics Agency)	$387,870	0.8%	Rank history: #78 in FY2021, not on the FY2022 list, #66 in FY2023, #77 in FY2024 and #48 in FY2025; up 27 since Jul 2024–Jun 2025.
22	Derrah Morrison Enterprises LLC Top agencies VA (Department of Veterans Affairs)	$350,915	0.7%	Rank history: not on the FY2021–FY2024 lists and #23 in FY2025; new, not ranked in Jul 2024–Jun 2025.
23	The Boeing Company Top agencies USAF (Department of the Air Force)	$274,407	0.6%	Rank history: not on the FY2021–FY2024 lists and #28 in FY2025; new, not ranked in Jul 2024–Jun 2025.
24	Lynchburg Air Preheater Corporation Top agencies DOI (Department of the Interior) Commerce (Department of Commerce)	$227,438	0.5%	Rank history: #25 in FY2021, #13 in FY2022, not on the FY2023 list, #6 in FY2024 and #18 in FY2025; down 13 since Jul 2024–Jun 2025.
25	Johnson Controls Navy Systems, LLC Top agencies DLA (Defense Logistics Agency)	$200,801	0.4%	Rank history: not on the FY2021–FY2025 lists; up 83 since Jul 2024–Jun 2025.
26	Westchester Plastics LLC Top agencies Army (Department of the Army)	$191,696	0.4%	Rank history: not on the FY2021–FY2023 lists, #30 in FY2024 and #34 in FY2025; new, not ranked in Jul 2024–Jun 2025.
27	All-Safe Inc. Top agencies DLA (Defense Logistics Agency)	$184,620	0.4%	Rank history: #60 in FY2021, not on the FY2022 list, #23 in FY2023, #53 in FY2024 and #49 in FY2025; new, not ranked in Jul 2024–Jun 2025.
28	Formica Industries LLC Top agencies DLA (Defense Logistics Agency)	$183,200	0.4%	Rank history: #32 in FY2021, #71 in FY2022, not on the FY2023–FY2024 lists and #75 in FY2025; new, not ranked in Jul 2024–Jun 2025.
29	Tomahawk Sourcing LLC Top agencies DLA (Defense Logistics Agency)	$175,133	0.4%	Rank history: #19 in FY2021, not on the FY2022 list, #52 in FY2023, #45 in FY2024 and #12 in FY2025; down 11 since Jul 2024–Jun 2025.
30	NGH Retail LLC Top agencies DLA (Defense Logistics Agency)	$173,088	0.4%	Rank history: #26 in FY2021, #54 in FY2022, #34 in FY2023, #41 in FY2024 and #35 in FY2025; up 11 since Jul 2024–Jun 2025.
31	Campbell-Sevey Inc. Top agencies VA (Department of Veterans Affairs)	$167,898	0.3%	Rank history: #96 in FY2021, #56 in FY2022, not on the FY2023–FY2024 lists and #68 in FY2025; new, not ranked in Jul 2024–Jun 2025.
32	Wizard Technologies Inc. Top agencies DLA (Defense Logistics Agency)	$165,770	0.3%	Rank history: not on the FY2021–FY2025 lists; up 82 since Jul 2024–Jun 2025.
33	Etairos Hvac JV, LLC Top agencies DOJ (Department of Justice)	$161,154	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
34	Powerhouse Equipment & Engineering Co Inc. Top agencies Navy (Department of the Navy)	$155,800	0.3%	Rank history: not on the FY2021–FY2024 lists and #60 in FY2025; up 23 since Jul 2024–Jun 2025.
35	Lake Shore Systems Inc. Top agencies Navy (Department of the Navy)	$151,318	0.3%	Rank history: not on the FY2021–FY2024 lists and #38 in FY2025; new, not ranked in Jul 2024–Jun 2025.
36	Trane U.s. Inc. Top agencies DOI (Department of the Interior)	$142,678	0.3%	Rank history: not on the FY2021–FY2023 lists, #84 in FY2024 and not on the FY2025 list; new, not ranked in Jul 2024–Jun 2025.
37	Apex Pinnacle Corp Top agencies DLA (Defense Logistics Agency)	$135,035	0.3%	Rank history: not on the FY2021–FY2024 lists and #40 in FY2025; new, not ranked in Jul 2024–Jun 2025.
38	Kay Kay LLC Top agencies DOJ (Department of Justice)	$133,303	0.3%	Rank history: not on the FY2021–FY2023 lists, #100 in FY2024 and #74 in FY2025; up 23 since Jul 2024–Jun 2025.
39	FAD Pennsylvania Inc Top agencies Navy (Department of the Navy)	$132,623	0.3%	Rank history: not on the FY2021–FY2023 lists, #7 in FY2024 and #51 in FY2025; down 15 since Jul 2024–Jun 2025.
40	Carrier Australia PTY Ltd Top agencies DOS (Department of State)	$131,024	0.3%	Rank history: not on the FY2021–FY2024 lists and #42 in FY2025; new, not ranked in Jul 2024–Jun 2025.
41	Westsim Engineering, Inc. Top agencies DLA (Defense Logistics Agency)	$124,988	0.3%	Rank history: #91 in FY2021, #76 in FY2022, #63 in FY2023, #83 in FY2024 and #45 in FY2025; up 68 since Jul 2024–Jun 2025.
42	Dela Technology Corporation Top agencies DLA (Defense Logistics Agency)	$123,070	0.3%	Rank history: not on the FY2021–FY2022 lists, #17 in FY2023, not on the FY2024 list and #29 in FY2025; down 11 since Jul 2024–Jun 2025.
43	Allclear Aerospace & Defense, Inc. Top agencies Navy (Department of the Navy)	$122,432	0.3%	Rank history: not on the FY2021–FY2024 lists and #39 in FY2025; down 4 since Jul 2024–Jun 2025.
44	Percipient Manufacturing, LLC Top agencies DLA (Defense Logistics Agency)	$117,780	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
45	Service Machine Shop, Incorporated	$115,000	0.2%	Rank history: not on the FY2021 list, #49 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
46	Leonardo S.p.A. Through Laurel Technologies Partnership Top agencies Navy (Department of the Navy)	$112,952	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
47	Larkos Packing and Distribution Inc. Top agencies DLA (Defense Logistics Agency)	$111,409	0.2%	Rank history: not on the FY2021–FY2022 lists, #53 in FY2023, #62 in FY2024 and not on the FY2025 list; up 60 since Jul 2024–Jun 2025.
48	Seventh Genius LLC Top agencies DOI (Department of the Interior)	$108,600	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
49	Pride Electronics Inc. Top agencies DLA (Defense Logistics Agency)	$106,400	0.2%	Rank history: not on the FY2021–FY2024 lists and #52 in FY2025; new, not ranked in Jul 2024–Jun 2025.
50	Power Plus International, Inc. Top agencies DOJ (Department of Justice)	$104,798	0.2%	Rank history: not on the FY2021–FY2024 lists and #46 in FY2025; up 40 since Jul 2024–Jun 2025.
51	Limco-Piedmont Inc. Through Limco Airepair Inc. Top agencies DLA (Defense Logistics Agency)	$104,112	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
52	Arhab LLC Top agencies DOI (Department of the Interior)	$102,580	0.2%	Rank history: not on the FY2021–FY2024 lists and #53 in FY2025; new, not ranked in Jul 2024–Jun 2025.
53	Dreamfind, Inc. Top agencies DLA (Defense Logistics Agency)	$100,192	0.2%	Rank history: not on the FY2021 list, #25 in FY2022, #47 in FY2023, #39 in FY2024 and #54 in FY2025; new, not ranked in Jul 2024–Jun 2025.
54	Invicta Global, LLC Top agencies Navy (Department of the Navy)	$93,534	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
55	Industrial Heat Technologies, Inc. Top agencies DOJ (Department of Justice)	$87,789	0.2%	Rank history: not on the FY2021 list, #88 in FY2022, #54 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
56	R.l. Deppmann Company, LLC Top agencies DOJ (Department of Justice)	$86,094	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
57	Industrial Heat Transfer, Inc. Top agencies DLA (Defense Logistics Agency)	$85,858	0.2%	Rank history: #35 in FY2021, not on the FY2022 list, #15 in FY2023, not on the FY2024 list and #57 in FY2025; new, not ranked in Jul 2024–Jun 2025.
58	Bluegrass Hydronics & Pump LLC Top agencies DOJ (Department of Justice)	$70,805	0.1%	Rank history: #31 in FY2021 and not on the FY2022–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
59	Confident Controls Usa, Inc. Top agencies HHS (Department of Health and Human Services)	$69,235	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
60	PC Vision Inc Top agencies USAF (Department of the Air Force)	$58,750	0.1%	Rank history: not on the FY2021–FY2024 lists and #64 in FY2025; new, not ranked in Jul 2024–Jun 2025.
61	Comprex, LLC Top agencies USAF (Department of the Air Force)	$50,325	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
62	Hydraulics International, Inc. Top agencies DLA (Defense Logistics Agency)	$46,830	0.1%	Rank history: not on the FY2021–FY2023 lists, #98 in FY2024 and #61 in FY2025; down 7 since Jul 2024–Jun 2025.
63	Defense Maritime Solutions, Inc. Top agencies Navy (Department of the Navy)	$46,247	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
64	Nevada Boiler Parts LLC Top agencies VA (Department of Veterans Affairs)	$46,130	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
65	Alfa Laval U.S. Holding Inc. 2 awardees, including Alfa Laval Inc. and Tranter Inc. Top agencies Navy (Department of the Navy) Commerce (Department of Commerce)	$45,469	0.1%	Rank history: not on the FY2021–FY2024 lists and #6 in FY2025; down 61 since Jul 2024–Jun 2025.
66	Grand Industries Inc. Top agencies DLA (Defense Logistics Agency)	$43,501	0.1%	Rank history: not on the FY2021–FY2023 lists, #99 in FY2024 and not on the FY2025 list; new, not ranked in Jul 2024–Jun 2025.
67	Cummins-Wagner Company, Inc. Top agencies DHS (Department of Homeland Security)	$42,864	0.1%	Rank history: not on the FY2021 list, #63 in FY2022, #27 in FY2023, #78 in FY2024 and #72 in FY2025; new, not ranked in Jul 2024–Jun 2025.
68	Russ Equipment Co., Incorporated Top agencies DHS (Department of Homeland Security)	$42,000	0.1%	Rank history: #66 in FY2021 and not on the FY2022–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
69	Quantum Marine Engineering Inc. Top agencies DHS (Department of Homeland Security)	$41,028	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
70	Paul Mueller Company Top agencies Navy (Department of the Navy)	$39,207	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
71	Unique Technology Systems LLC Top agencies DHS (Department of Homeland Security)	$34,795	0.1%	Rank history: not on the FY2021–FY2024 lists and #78 in FY2025; new, not ranked in Jul 2024–Jun 2025.
72	GI Corporation Top agencies DLA (Defense Logistics Agency)	$34,396	0.1%	Rank history: not on the FY2021–FY2023 lists, #64 in FY2024 and #63 in FY2025; down 19 since Jul 2024–Jun 2025.
73	Bernard J. Mulcahy Company, Inc. Top agencies VA (Department of Veterans Affairs)	$33,934	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
74	Govparts LLC Top agencies DLA (Defense Logistics Agency)	$32,736	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
75	Ray Blackman Enterprises, Inc. Top agencies DLA (Defense Logistics Agency)	$29,704	0.1%	Rank history: #82 in FY2021, #30 in FY2022, not on the FY2023–FY2024 lists and #47 in FY2025; down 33 since Jul 2024–Jun 2025.
76	API Heat Transfer Inc. Top agencies DHS (Department of Homeland Security)	$28,706	0.1%	Rank history: not on the FY2021–FY2024 lists and #26 in FY2025; down 47 since Jul 2024–Jun 2025.
77	Performance Diesel Inc. Top agencies DHS (Department of Homeland Security)	$28,700	0.1%	Rank history: not on the FY2021 list, #37 in FY2022, not on the FY2023 list, #72 in FY2024 and not on the FY2025 list; down 9 since Jul 2024–Jun 2025.
78	Cummins Inc. Top agencies DLA (Defense Logistics Agency)	$27,969	0.1%	Rank history: not on the FY2021–FY2024 lists and #82 in FY2025; up 7 since Jul 2024–Jun 2025.
79	Jenks Inc. Top agencies DOS (Department of State)	$26,173	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
80	Integrated Procurement Technologies Top agencies DLA (Defense Logistics Agency)	$25,759	0.1%	Rank history: not on the FY2021–FY2024 lists and #7 in FY2025; down 75 since Jul 2024–Jun 2025.
81	WKF (Friedman) Enterprises, Inc. Top agencies DLA (Defense Logistics Agency)	$24,528	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
82	Delval Equipment Corporation Top agencies USAF (Department of the Air Force)	$23,892	<0.1%	Rank history: not on the FY2021–FY2024 lists and #83 in FY2025; new, not ranked in Jul 2024–Jun 2025.
83	Womack Machine Supply Co., LLC Top agencies DLA (Defense Logistics Agency)	$23,471	<0.1%	Rank history: not on the FY2021–FY2024 lists and #73 in FY2025; up 3 since Jul 2024–Jun 2025.
84	Adrick Marine Group, Inc. Top agencies DHS (Department of Homeland Security)	$19,851	<0.1%	Rank history: not on the FY2021–FY2024 lists and #87 in FY2025; new, not ranked in Jul 2024–Jun 2025.
85	Gardner Denver Nash LLC Top agencies DLA (Defense Logistics Agency)	$19,800	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
86	Metro Reliable Resources Corp. Top agencies DLA (Defense Logistics Agency)	$19,008	<0.1%	Rank history: #30 in FY2021, not on the FY2022 list, #92 in FY2023, #42 in FY2024 and #76 in FY2025; down 35 since Jul 2024–Jun 2025.
87	Steris Corporation Top agencies VA (Department of Veterans Affairs)	$18,945	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
88	Combustion Service & Equipment Co Top agencies VA (Department of Veterans Affairs)	$18,855	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
89	3075109 Canada Inc. Top agencies Army (Department of the Army)	$18,464	<0.1%	Rank history: #28 in FY2021, not on the FY2022–FY2024 lists and #88 in FY2025; new, not ranked in Jul 2024–Jun 2025.
90	Hvac Distributors Inc. Top agencies DOJ (Department of Justice)	$18,293	<0.1%	Rank history: not on the FY2021–FY2024 lists and #58 in FY2025; down 38 since Jul 2024–Jun 2025.
91	Fleurs Enterprises LLC Top agencies VA (Department of Veterans Affairs)	$16,890	<0.1%	Rank history: not on the FY2021–FY2024 lists and #90 in FY2025; new, not ranked in Jul 2024–Jun 2025.
92	Mahan's Thermal Products, Inc. Top agencies DHS (Department of Homeland Security)	$16,786	<0.1%	Rank history: #69 in FY2021, not on the FY2022 list, #65 in FY2023, #74 in FY2024 and not on the FY2025 list; down 20 since Jul 2024–Jun 2025.
93	Nationwide Supplies, L.P. Top agencies DOS (Department of State)	$16,713	<0.1%	Rank history: not on the FY2021–FY2024 lists and #86 in FY2025; up 27 since Jul 2024–Jun 2025.
94	Aviate Enterprises, Inc. Top agencies Army (Department of the Army)	$16,311	<0.1%	Rank history: not on the FY2021–FY2024 lists and #93 in FY2025; new, not ranked in Jul 2024–Jun 2025.
95	R.w. Fernstrum & Company Top agencies Navy (Department of the Navy)	$16,171	<0.1%	Rank history: #98 in FY2021, not on the FY2022 list, #59 in FY2023, #38 in FY2024 and not on the FY2025 list; new, not ranked in Jul 2024–Jun 2025.
96	Parks & Docks Supply Company LLC Top agencies DLA (Defense Logistics Agency)	$15,391	<0.1%	Rank history: not on the FY2021–FY2024 lists and #97 in FY2025; new, not ranked in Jul 2024–Jun 2025.
97	Multistack LLC Top agencies DOS (Department of State)	$14,780	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
98	American Chiller Service, Inc. Top agencies Treasury (Department of the Treasury)	$13,864	<0.1%	Rank history: not on the FY2021–FY2023 lists, #17 in FY2024 and #98 in FY2025; down 70 since Jul 2024–Jun 2025.
99	ZCS Interconnect, LLC Top agencies DLA (Defense Logistics Agency)	$12,250	<0.1%	Rank history: not on the FY2021–FY2025 lists; up 12 since Jul 2024–Jun 2025.
100	State Supply Co Inc. Top agencies HHS (Department of Health and Human Services)	$11,937	<0.1%	Rank history: not on the FY2021–FY2022 lists, #76 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.

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100 of 134 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 $49 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.
Period: the trailing 12 months end with the last month that ended at least 90 days ago, because the Department of Defense reports its contract actions to FPDS about 90 days late. The list is rebuilt each night.
Rank changes compare with Jul 2024–Jun 2025. "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.
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 4420 contractors in Jul 2025–Jun 2026?

1. ECI Defense Group, Inc. ($8.41M), 2. Aqua-Chem, Inc. ($7.63M), 3. Arctic Slope Regional Corporation ($4.26M), 4. Chand, L.L.C. ($3.32M), 5. Atlantic Diving Supply, Inc. ($2.41M), 6. Jgils, LLC ($2.38M), 7. Argo Turboserve Corporation ($1.35M), 8. Mactaggart, Scott & Co. Ltd ($1.03M), 9. Renk Systems Corp ($1.03M), 10. Kampi Components Co Inc. ($1.02M).

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