Top 100 Contractors in PSC M1: Operate Government Owned Buildings, FY2025

Name: Top 100 Contractors in PSC M1: Operate Government Owned Buildings, FY2025
Creator: GovTribe
License: https://creativecommons.org/licenses/by/4.0/

Parent companies by net contract obligations Oct 1, 2024 – Sep 30, 2025 Code page on GovTribe

The top 10 won 71% of FY2025 PSC M1 contract dollars

Contract obligations: $42,107,326,697 Net of deobligations, by contracts coded PSC M1 or a code under it
Contractors: 960 Parent companies with an obligation
Largest contractor: Honeywell International Inc. $7.79 billion, 17.5% of obligations
Data as of: Oct 23, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV · Free to reuse with credit to GovTribe (CC BY 4.0)

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Honeywell International Inc. 3 awardees, including National Technology & Engineering Solutions of Sandia, LLC and Honeywell Federal Manufacturing & Technologies, LLC Top agencies DOE (Department of Energy) Navy (Department of the Navy) USAF (Department of the Air Force)	$7,786,937,279	17.5%	Rank history: #1 in FY2021, #1 in FY2022, #1 in FY2023 and #1 in FY2024; unchanged since FY2024.
2	Triad National Security LLC Top agencies DOE (Department of Energy) Navy (Department of the Navy) USAF (Department of the Air Force)	$5,087,344,498	11.4%	Rank history: #2 in FY2021, #2 in FY2022, #2 in FY2023 and #2 in FY2024; unchanged since FY2024.
3	Fluor Corporation 3 awardees, including Savannah River Nuclear Solutions LLC and Fluor Marine Propulsion, LLC Top agencies DOE (Department of Energy)	$3,678,493,530	8.2%	Rank history: #7 in FY2021, #8 in FY2022, #7 in FY2023 and #3 in FY2024; unchanged since FY2024.
4	Battelle Memorial Institute 3 awardees, including Battelle Energy Alliance, LLC Top agencies DOE (Department of Energy) DOT (Department of Transportation)	$3,585,764,833	8.0%	Rank history: #3 in FY2021, #4 in FY2022, #9 in FY2023 and #5 in FY2024; up 1 since FY2024.
5	Ut-Battelle LLC Top agencies DOE (Department of Energy)	$2,679,775,141	6.0%	Rank history: #5 in FY2021, #5 in FY2022, #4 in FY2023 and #6 in FY2024; up 1 since FY2024.
6	Consolidated Nuclear Security, LLC Top agencies DOE (Department of Energy) Navy (Department of the Navy) Army (Department of the Army)	$2,537,032,429	5.7%	Rank history: #4 in FY2021, #3 in FY2022, #3 in FY2023 and #4 in FY2024; down 2 since FY2024.
7	Pantexas Deterrence, LLC Top agencies DOE (Department of Energy) Navy (Department of the Navy) Army (Department of the Army)	$1,921,935,329	4.3%	Rank history: not on the FY2021–FY2024 lists; up 94 since FY2024.
8	Fermi Forward Discovery Group, LLC Top agencies DOE (Department of Energy)	$1,733,790,751	3.9%	Rank history: not on the FY2021–FY2024 lists; new.
9	The Regents of the University of California 2 awardees, including Alliance for Advancing Biomedical Research Top agencies DOE (Department of Energy) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$1,304,352,684	2.9%	Rank history: not on the FY2021–FY2023 lists and #7 in FY2024; down 2 since FY2024.
10	MSM Group North America Inc. Top agencies Army (Department of the Army)	$1,270,400,000	2.8%	Rank history: not on the FY2021–FY2024 lists; new.
11	Uchicago Argonne, LLC Top agencies DOE (Department of Energy) DHS (Department of Homeland Security) DARPA (Defense Advanced Research Projects Agency)	$1,158,612,573	2.6%	Rank history: not on the FY2021–FY2023 lists and #10 in FY2024; down 1 since FY2024.
12	Mission Support & Test Services LLC Top agencies DOE (Department of Energy) USAF (Department of the Air Force) Army (Department of the Army)	$994,553,799	2.2%	Rank history: #10 in FY2021, #11 in FY2022, #13 in FY2023 and #9 in FY2024; down 3 since FY2024.
13	Alliance for Energy Innovation, LLC Top agencies DOE (Department of Energy) Treasury (Department of the Treasury) DOI (Department of the Interior)	$894,961,406	2.0%	Rank history: #13 in FY2021, #12 in FY2022, #12 in FY2023 and #8 in FY2024; down 5 since FY2024.
14	Brookhaven Science Associates LLC Top agencies DOE (Department of Energy)	$833,727,134	1.9%	Rank history: #11 in FY2021, #10 in FY2022, #14 in FY2023 and #12 in FY2024; down 2 since FY2024.
15	Hanford Tank Waste Operations & Closure, LLC Top agencies DOE (Department of Energy)	$796,035,008	1.8%	Rank history: not on the FY2021–FY2024 lists; new.
16	The Leland Stanford Junior University Top agencies DOE (Department of Energy) USAF (Department of the Air Force) DARPA (Defense Advanced Research Projects Agency)	$711,960,396	1.6%	Rank history: #14 in FY2021, #14 in FY2022, #16 in FY2023 and #14 in FY2024; down 2 since FY2024.
17	Dgci Corporation Top agencies DLA (Defense Logistics Agency)	$397,716,480	0.9%	Rank history: not on the FY2021–FY2024 lists; new.
18	Amentum Holdings, Inc. 7 awardees, including Amentum Services, Inc., Syncom Space Services LLC and Amentum Technology, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$384,639,374	0.9%	Rank history: not on the FY2021–FY2023 lists and #44 in FY2024; up 26 since FY2024.
19	Leidos Holdings, Inc. 4 awardees, including Leidos, Inc. Top agencies NSF (National Science Foundation) Army (Department of the Army)	$327,212,511	0.7%	Rank history: #12 in FY2021, #13 in FY2022, #15 in FY2023 and #17 in FY2024; down 2 since FY2024.
20	Sodexo Management Inc. Top agencies Navy (Department of the Navy)	$275,266,829	0.6%	Rank history: not on the FY2021 list, #22 in FY2022, #21 in FY2023 and #21 in FY2024; up 1 since FY2024.
21	The Trustees of Princeton University Top agencies DOE (Department of Energy) DARPA (Defense Advanced Research Projects Agency) NASA (National Aeronautics and Space Administration)	$224,326,822	0.5%	Rank history: #22 in FY2021, #19 in FY2022, #24 in FY2023 and #27 in FY2024; up 6 since FY2024.
22	Jefferson Science Associates, LLC Top agencies DOE (Department of Energy)	$213,622,257	0.5%	Rank history: #20 in FY2021, #17 in FY2022, #19 in FY2023 and #22 in FY2024; unchanged since FY2024.
23	Tote Services, LLC Top agencies Navy (Department of the Navy) DOT (Department of Transportation) MDA (DOD Missile Defense Agency)	$135,126,679	0.3%	Rank history: not on the FY2021–FY2023 lists and #32 in FY2024; up 9 since FY2024.
24	Goodwill Industries of Southeastern Wisconsin, Inc. Top agencies Navy (Department of the Navy)	$134,416,236	0.3%	Rank history: #26 in FY2021, #28 in FY2022, #27 in FY2023 and #61 in FY2024; up 37 since FY2024.
25	Patriot Contract Services, LLC Top agencies Navy (Department of the Navy) DOT (Department of Transportation) Army (Department of the Army)	$129,969,514	0.3%	Rank history: #38 in FY2021, #63 in FY2022, #48 in FY2023 and #26 in FY2024; up 1 since FY2024.
26	Nova Space Solutions, LLC Top agencies NASA (National Aeronautics and Space Administration)	$129,847,904	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
27	Keystone Shipping Services, Inc. Top agencies Navy (Department of the Navy) DOT (Department of Transportation)	$123,455,052	0.3%	Rank history: not on the FY2021–FY2023 lists and #41 in FY2024; up 14 since FY2024.
28	General Dynamics Corporation 3 awardees, including General Dynamics OTS (Wilkes Barre), LLC Top agencies Army (Department of the Army)	$117,904,205	0.3%	Rank history: not on the FY2021 list, #23 in FY2022, #10 in FY2023 and #18 in FY2024; down 10 since FY2024.
29	Iowa State University of Science and Technology Top agencies DOE (Department of Energy)	$117,469,216	0.3%	Rank history: #41 in FY2021, #38 in FY2022, #30 in FY2023 and #48 in FY2024; up 19 since FY2024.
30	The GEO Group, Inc. 2 awardees, including GEO Secure Services, LLC Top agencies DOJ (Department of Justice)	$117,409,134	0.3%	Rank history: #48 in FY2021, #40 in FY2022, #52 in FY2023 and #29 in FY2024; down 1 since FY2024.
31	Mid-America Conversion Services, LLC Top agencies DOE (Department of Energy)	$111,926,378	0.3%	Rank history: #23 in FY2021, #25 in FY2022, #28 in FY2023 and #28 in FY2024; down 3 since FY2024.
32	LDRM LLC Top agencies DOS (Department of State)	$106,508,916	0.2%	Rank history: #33 in FY2021, #33 in FY2022, #31 in FY2023 and #37 in FY2024; up 5 since FY2024.
33	Indyne, Inc. 2 awardees Top agencies USAF (Department of the Air Force)	$104,994,254	0.2%	Rank history: #34 in FY2021, #30 in FY2022, #36 in FY2023 and #34 in FY2024; up 1 since FY2024.
34	State of Georgia Through Georgia Vocational Rehabilitation Agency Top agencies Army (Department of the Army) DHS (Department of Homeland Security) Navy (Department of the Navy)	$104,344,218	0.2%	Rank history: #67 in FY2021, #60 in FY2022, #56 in FY2023 and #73 in FY2024; up 39 since FY2024.
35	Robinson Aviation (Rva), Inc. Top agencies DOT (Department of Transportation)	$85,414,425	0.2%	Rank history: #39 in FY2021, #39 in FY2022, #35 in FY2023 and #35 in FY2024; unchanged since FY2024.
36	KBR Wyle Services LLC 2 awardees, including KBR Services, LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DHA (Defense Health Agency)	$81,861,953	0.2%	Rank history: not on the FY2021–FY2023 lists and #72 in FY2024; up 36 since FY2024.
37	Midwest Air Traffic Control Service Inc Top agencies DOT (Department of Transportation) Navy (Department of the Navy)	$75,934,005	0.2%	Rank history: #45 in FY2021, #43 in FY2022, #39 in FY2023 and #38 in FY2024; up 1 since FY2024.
38	Central Council Tlingit and Haida Indian Tribes of Alaska 3 awardees, including T&H Services, LLC, Kira Training Services LLC and Kira Aviation Services LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$73,285,263	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
39	CAE Inc. Through CAE USA Inc. Top agencies USAF (Department of the Air Force)	$72,188,581	0.2%	Rank history: #61 in FY2021, #44 in FY2022, #40 in FY2023 and not on the FY2024 list; up 306 since FY2024.
40	Koa Lani JV LLC Top agencies Navy (Department of the Navy)	$71,078,627	0.2%	Rank history: #52 in FY2021, #31 in FY2022, #37 in FY2023 and #42 in FY2024; up 2 since FY2024.
41	Science Applications International Corporation Top agencies USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration) NTSB (National Transportation Safety Board)	$68,417,238	0.2%	Rank history: #99 in FY2021, not on the FY2022 list, #46 in FY2023 and #30 in FY2024; down 11 since FY2024.
42	BAE Systems 2 awardees, including BAE Systems Ordnance Systems Inc. Top agencies Army (Department of the Army)	$66,791,041	0.1%	Rank history: #35 in FY2021, #66 in FY2022, #20 in FY2023 and #25 in FY2024; down 17 since FY2024.
43	Inussuk A / S Top agencies USAF (Department of the Air Force) DHA (Defense Health Agency)	$62,657,108	0.1%	Rank history: not on the FY2021–FY2023 lists and #79 in FY2024; up 36 since FY2024.
44	Kgjj Engineering Solutions, LLC Top agencies Army (Department of the Army)	$60,788,852	0.1%	Rank history: not on the FY2021–FY2022 lists, #73 in FY2023 and #80 in FY2024; up 36 since FY2024.
45	Bering Straits Native Corporation 4 awardees, including Arcticom, LLC, Kupono Government Services, LLC and Bering Straits Professional Services, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) DHA (Defense Health Agency)	$60,633,823	0.1%	Rank history: not on the FY2021–FY2022 lists, #60 in FY2023 and not on the FY2024 list; up 187 since FY2024.
46	Maytag Aircraft LLC Top agencies DLA (Defense Logistics Agency)	$59,880,364	0.1%	Rank history: not on the FY2021–FY2024 lists; up 61 since FY2024.
47	CGI Federal Inc. Top agencies DOS (Department of State)	$59,737,032	0.1%	Rank history: not on the FY2021–FY2023 lists and #40 in FY2024; down 7 since FY2024.
48	Ocean Shipholdings, Inc. 2 awardees, including Ocean Duchess, Inc. Top agencies Navy (Department of the Navy)	$55,714,684	0.1%	Rank history: not on the FY2021–FY2022 lists, #44 in FY2023 and #51 in FY2024; up 3 since FY2024.
49	Four Seasons Environmental Inc. Top agencies HHS (Department of Health and Human Services)	$51,857,252	0.1%	Rank history: #63 in FY2021, #57 in FY2022, #75 in FY2023 and not on the FY2024 list; up 173 since FY2024.
50	Arctic Slope Regional Corporation Through Asrc Federal Field Services, LLC Top agencies DHS (Department of Homeland Security)	$51,116,230	0.1%	Rank history: #59 in FY2021, #49 in FY2022, #51 in FY2023 and #89 in FY2024; up 39 since FY2024.
51	State of South Carolina Through South Carolina Commission for Blind Top agencies Army (Department of the Army)	$49,366,191	0.1%	Rank history: #71 in FY2021, #59 in FY2022, #54 in FY2023 and not on the FY2024 list; up 63 since FY2024.
52	Peraton Inc. Top agencies NASA (National Aeronautics and Space Administration)	$43,561,941	0.1%	Rank history: not on the FY2021–FY2023 lists and #59 in FY2024; up 7 since FY2024.
53	Serco Inc 2 awardees Top agencies DOT (Department of Transportation) USAF (Department of the Air Force)	$43,199,375	0.1%	Rank history: not on the FY2021–FY2022 lists, #76 in FY2023 and #46 in FY2024; down 7 since FY2024.
54	Star Energy Resources Ltd Top agencies DLA (Defense Logistics Agency)	$39,296,403	0.1%	Rank history: not on the FY2021–FY2024 lists; up 248 since FY2024.
55	Pacific-Gulf Marine, Inc. Top agencies Navy (Department of the Navy)	$37,528,031	0.1%	Rank history: #64 in FY2021, #45 in FY2022, #43 in FY2023 and #53 in FY2024; down 2 since FY2024.
56	RTX Corporation Through Raytheon Company Top agencies Navy (Department of the Navy)	$36,598,416	0.1%	Rank history: not on the FY2021–FY2023 lists and #65 in FY2024; up 9 since FY2024.
57	The Pasha Group 2 awardees, including Pasha Hawaii Holdings LLC and Sunrise Vessel Operations LLC Top agencies Navy (Department of the Navy)	$35,574,116	0.1%	Rank history: not on the FY2021–FY2022 lists, #82 in FY2023 and not on the FY2024 list; up 89 since FY2024.
58	Department of Rehabilitation Services Top agencies Army (Department of the Army)	$33,758,067	0.1%	Rank history: not on the FY2021–FY2023 lists and #71 in FY2024; up 13 since FY2024.
59	UMB Financial Corporation Through Crowley Alaska, Inc. Top agencies DLA (Defense Logistics Agency)	$33,482,350	0.1%	Rank history: #19 in FY2021, #47 in FY2022, #47 in FY2023 and #39 in FY2024; down 20 since FY2024.
60	Southern Foodservice Management Inc. Top agencies Army (Department of the Army)	$32,504,585	0.1%	Rank history: not on the FY2021 list, #98 in FY2022, #62 in FY2023 and #83 in FY2024; up 23 since FY2024.
61	Deployed Resources LLC Top agencies DHS (Department of Homeland Security)	$31,436,283	0.1%	Rank history: #15 in FY2021, #15 in FY2022, #17 in FY2023 and #15 in FY2024; down 46 since FY2024.
62	Cherokee Nation 5 awardees, including Cherokee Nation Government Solutions, L.L.C., Cherokee Nation Management & Consulting, L.l.c.. and Cherokee Nation Strategic Programs, L.L.C. Top agencies Navy (Department of the Navy) Army (Department of the Army) MDA (DOD Missile Defense Agency)	$31,138,729	0.1%	Rank history: #70 in FY2021, #55 in FY2022, #58 in FY2023 and not on the FY2024 list; up 64 since FY2024.
63	The Aleut Corporation 3 awardees, including Aleut O&M Services, LLC, Aleut Information Technology, LLC and Aleut Logistics Services, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$29,947,705	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
64	Eagle Harbor, LLC Top agencies DOE (Department of Energy)	$29,586,940	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
65	Sitemaster Inc. Through R & D Maintenance Services Inc. Top agencies Army (Department of the Army)	$29,071,295	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
66	Tsay Professional Services, Inc. Top agencies Army (Department of the Army)	$26,425,950	0.1%	Rank history: #60 in FY2021, #51 in FY2022, #67 in FY2023 and #74 in FY2024; up 8 since FY2024.
67	Veolia Water West Operating Services Inc. Top agencies IBWC (International Boundary and Water Commission U.S.-Mexico)	$26,324,811	0.1%	Rank history: not on the FY2021–FY2024 lists; up 60 since FY2024.
68	Altus Technical Solutions LLC 2 awardees, including At2, LLC Top agencies USAF (Department of the Air Force)	$25,852,496	0.1%	Rank history: not on the FY2021–FY2024 lists; up 49 since FY2024.
69	Ranger Defense, Incorporated Through Ranger Land Systems, Inc. Top agencies DHS (Department of Homeland Security)	$25,789,236	0.1%	Rank history: not on the FY2021–FY2023 lists and #57 in FY2024; down 12 since FY2024.
70	Melwood Horticultural Training Center, Inc. Top agencies Army (Department of the Army) DOJ (Department of Justice)	$25,301,910	0.1%	Rank history: not on the FY2021 list, #73 in FY2022, #81 in FY2023 and #82 in FY2024; up 12 since FY2024.
71	Regents of the University of California the (4458) Top agencies DOE (Department of Energy)	$24,099,156	0.1%	Rank history: #47 in FY2021, #94 in FY2022, #65 in FY2023 and #69 in FY2024; down 2 since FY2024.
72	Texas Workforce Commission Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$23,376,367	0.1%	Rank history: not on the FY2021–FY2024 lists; up 65 since FY2024.
73	Commonwealth Scientific and Industrial Research Organisation Top agencies NASA (National Aeronautics and Space Administration)	$23,234,265	0.1%	Rank history: not on the FY2021–FY2023 lists and #85 in FY2024; up 12 since FY2024.
74	Ukpeagvik Inupiat Corporation 3 awardees, including Bowhead Logistics Management, LLC and Bowhead Communication Services LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$21,732,072	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
75	Missouri Department of Social Services Top agencies Army (Department of the Army)	$21,657,759	<0.1%	Rank history: not on the FY2021–FY2023 lists and #60 in FY2024; down 15 since FY2024.
76	Tunista Logistics Solutions LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$20,710,223	<0.1%	Rank history: not on the FY2021–FY2023 lists and #92 in FY2024; up 16 since FY2024.
77	Cruz Associates Inc. Top agencies Navy (Department of the Navy)	$20,701,421	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
78	Adams and Associates Inc. Top agencies DOL (Department of Labor)	$20,653,447	<0.1%	Rank history: #32 in FY2021, #35 in FY2022, #63 in FY2023 and not on the FY2024 list; up 168 since FY2024.
79	Professional Contract Services, Inc. Top agencies Army (Department of the Army)	$20,162,662	<0.1%	Rank history: not on the FY2021–FY2022 lists, #72 in FY2023 and #70 in FY2024; down 9 since FY2024.
80	Instituto Nacional De Tecnica Aeroespacial Esteban Terradas MDE Top agencies NASA (National Aeronautics and Space Administration)	$19,983,986	<0.1%	Rank history: not on the FY2021 list, #75 in FY2022, #92 in FY2023 and #97 in FY2024; up 17 since FY2024.
81	Crowley Energy Anchorage, LLC Top agencies DLA (Defense Logistics Agency)	$19,754,241	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
82	TRC Government Services, LLC Top agencies DLA (Defense Logistics Agency)	$17,900,566	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 94 since FY2024.
83	Commonwealth of Virginia Department of the Treasury Through Blind and Vision Impaired, Virginia Department for The Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$17,839,119	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
84	Enviremedial Services, Inc. Top agencies Army (Department of the Army)	$17,216,549	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 18 since FY2024.
85	Inland Dredging Company, L.L.C. Top agencies Army (Department of the Army)	$16,857,900	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
86	WSP USA Solutions Inc 2 awardees, including VGS Aircraft Services, Inc. and WSP USA Environment & Infrastructure Inc. Top agencies USAF (Department of the Air Force) EPA (Environmental Protection Agency) Navy (Department of the Navy)	$16,304,813	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 293 since FY2024.
87	Trivandi Dmcc Top agencies DOS (Department of State)	$16,263,984	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
88	CI2 Aviation, Inc. Top agencies DOT (Department of Transportation)	$15,265,728	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
89	Guidehouse Inc. Through Aptim Federal Services, LLC Top agencies Navy (Department of the Navy)	$15,223,691	<0.1%	Rank history: not on the FY2021–FY2023 lists and #99 in FY2024; up 10 since FY2024.
90	AL. Dept. of Public Health Through Alabama Department of Rehabilitation Services Top agencies USAF (Department of the Air Force) DHS (Department of Homeland Security) Army (Department of the Army)	$15,179,634	<0.1%	Rank history: not on the FY2021–FY2022 lists, #94 in FY2023 and not on the FY2024 list; up 16 since FY2024.
91	Central Marine Logistics Inc. Top agencies DOT (Department of Transportation) Navy (Department of the Navy)	$14,703,184	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 47 since FY2024.
92	TK & K Services LLC Top agencies DLA (Defense Logistics Agency)	$14,554,544	<0.1%	Rank history: #89 in FY2021, #61 in FY2022, #61 in FY2023 and not on the FY2024 list; up 49 since FY2024.
93	Emcor Group Inc. Through Emcor Government Services, Inc. Top agencies DOE (Department of Energy)	$14,266,541	<0.1%	Rank history: not on the FY2021–FY2023 lists and #96 in FY2024; up 3 since FY2024.
94	Calista Corp 2 awardees, including Tunista Operations Support Services LLC and Brice Solutions, LLC Top agencies DLA (Defense Logistics Agency) Army (Department of the Army)	$13,552,172	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
95	Solution One Industries, Inc. Top agencies USAF (Department of the Air Force) EPA (Environmental Protection Agency)	$12,651,507	<0.1%	Rank history: #94 in FY2021, #96 in FY2022, #89 in FY2023 and #93 in FY2024; down 2 since FY2024.
96	Health & Human Services, North Carolina Top agencies Army (Department of the Army)	$12,070,347	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 89 since FY2024.
97	King & George, LLC 2 awardees, including KGN Support Services LLC Top agencies DOT (Department of Transportation) Navy (Department of the Navy) DHS (Department of Homeland Security)	$11,581,307	<0.1%	Rank history: not on the FY2021–FY2022 lists, #97 in FY2023 and not on the FY2024 list; up 16 since FY2024.
98	Keystone Shipping Co Top agencies Navy (Department of the Navy) DOT (Department of Transportation)	$11,419,102	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
99	Katmai Technical Services LLC Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$11,099,545	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 23 since FY2024.
100	Nakupuna Services LLC Top agencies Navy (Department of the Navy)	$11,021,958	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 21 since FY2024.

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100 of 960 contractors listed here. See the rest on GovTribe.

Rankings for the codes under PSC M1

Code	Net obligations	Largest contractor
M1JZ Operation of Miscellaneous Buildings	$18,525,481,929	Honeywell International Inc.
M1FD Operation of Dining Facilities	$837,994,015	Sodexo Management Inc.
M1PZ Operation of Other Non-Building Facilities	$613,481,449	Tote Services, LLC
M1NA Operation of Fuel Supply Facilities	$572,080,673	Dgci Corporation
M1AZ Operation of Other Administrative Facilities and Service Buildings	$548,577,234	LDRM LLC
M1GZ Operation of Other Warehouse Buildings	$262,622,186	Amentum Holdings, Inc.
M1AA Operation of Office Buildings	$103,209,925	Four Seasons Environmental Inc.
M1PA Operation of Recreation Facilities (Non-Building)	$44,696,336	Sitemaster Inc.
M1ND Operation of Sewage and Waste Facilities	$36,081,216	Veolia Water West Operating Services Inc.
M1LZ Operation of Parking Facilities	$26,228,324	In & Out Valet Co
M1NE Operation of Water Supply Facilities	$18,289,060	Bristol Bay Native Corporation

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 $44.6 billion obligated before deobligations, so they never pass 100%.
Parent companies: each action counts under the ultimate parent its award record names, or under the awardee when it names none, so no dollar counts twice. An awardee whose own actions mostly name no parent, and that no other company's actions name as their parent, rolls up its SAM.gov registration's chain of parent companies: it counts under the first company there that other companies' actions name as their parent, or under the parent most of a company's own actions name, whichever comes first; with neither, under the highest company in the chain with federal contracts of its own. Joint ventures stay companies of their own. 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 2025 ran Oct 1, 2024 – Sep 30, 2025. 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 FY2024. "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 FY2024 takes the color of the rank change beside it.
Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

Quick answers

Who were the top 10 PSC M1 contractors in FY2025?

1. Honeywell International Inc. ($7.79B), 2. Triad National Security LLC ($5.09B), 3. Fluor Corporation ($3.68B), 4. Battelle Memorial Institute ($3.59B), 5. Ut-Battelle LLC ($2.68B), 6. Consolidated Nuclear Security, LLC ($2.54B), 7. Pantexas Deterrence, LLC ($1.92B), 8. Fermi Forward Discovery Group, LLC ($1.73B), 9. The Regents of the University of California ($1.3B), 10. MSM Group North America Inc. ($1.27B).

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