Top 100 Contractors in PSC M1: Operate Government Owned Buildings, FY2023

Name: Top 100 Contractors in PSC M1: Operate Government Owned Buildings, FY2023
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2022 – Sep 30, 2023 Code page on GovTribe

The top 10 won 70% of FY2023 PSC M1 contract dollars

Contract obligations: $40,545,842,932 Net of deobligations, by contracts coded PSC M1 or a code under it
Contractors: 1,038 Parent companies with an obligation
Largest contractor: Honeywell International Inc. $6.5 billion, 15.7% 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	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) USAF (Department of the Air Force) Navy (Department of the Navy)	$6,497,437,000	15.7%	Rank history: #1 in FY2021, #1 in FY2022, #1 in FY2024 and #1 in FY2025; unchanged since FY2022.
2	Triad National Security LLC 2 awardees Top agencies DOE (Department of Energy) USAF (Department of the Air Force) OSD (Office of the Secretary of Defense)	$4,578,543,111	11.1%	Rank history: #2 in FY2021, #2 in FY2022, #2 in FY2024 and #2 in FY2025; unchanged since FY2022.
3	Consolidated Nuclear Security, LLC Top agencies DOE (Department of Energy) Navy (Department of the Navy) Army (Department of the Army)	$3,329,130,207	8.1%	Rank history: #4 in FY2021, #3 in FY2022, #4 in FY2024 and #6 in FY2025; unchanged since FY2022.
4	Ut-Battelle LLC Top agencies DOE (Department of Energy)	$2,712,833,486	6.6%	Rank history: #5 in FY2021, #5 in FY2022, #6 in FY2024 and #5 in FY2025; up 1 since FY2022.
5	Savannah River Nuclear Solutions LLC Top agencies DOE (Department of Energy)	$2,539,868,766	6.1%	Rank history: #6 in FY2021, #6 in FY2022, #23 in FY2024 and not on the FY2025 list; up 1 since FY2022.
6	Battelle Energy Alliance, LLC 2 awardees Top agencies DOE (Department of Energy)	$2,234,861,162	5.4%	Rank history: not on the FY2021 list, #20 in FY2022, #11 in FY2024 and not on the FY2025 list; up 14 since FY2022.
7	Fluor Corporation 2 awardees, including Fluor Marine Propulsion, LLC and Fluor Federal Solutions, LLC Top agencies DOE (Department of Energy) DOL (Department of Labor)	$2,002,116,438	4.8%	Rank history: #7 in FY2021, #8 in FY2022, #3 in FY2024 and #3 in FY2025; up 1 since FY2022.
8	Government of the United States 4 awardees, including Uchicago Argonne, LLC, Fermi Research Alliance, LLC and 99 FSS Fsvl Top agencies DOE (Department of Energy) DHS (Department of Homeland Security) DOI (Department of the Interior)	$1,862,885,538	4.5%	Rank history: #8 in FY2021, #7 in FY2022, #19 in FY2024 and not on the FY2025 list; down 1 since FY2022.
9	Battelle Memorial Institute 2 awardees Top agencies DOE (Department of Energy) DOT (Department of Transportation)	$1,593,181,941	3.9%	Rank history: #3 in FY2021, #4 in FY2022, #5 in FY2024 and #4 in FY2025; down 5 since FY2022.
10	General Dynamics Corporation Through General Dynamics OTS (Wilkes Barre), LLC Top agencies Army (Department of the Army)	$1,438,680,475	3.5%	Rank history: not on the FY2021 list, #23 in FY2022, #18 in FY2024 and #28 in FY2025; up 13 since FY2022.
11	State of California Controllers Office 4 awardees, including The Regents of the University of California and State of California Water Resources Control Board Top agencies DOE (Department of Energy) DHA (Defense Health Agency) DOJ (Department of Justice)	$1,393,071,620	3.4%	Rank history: #9 in FY2021, #9 in FY2022, #24 in FY2024 and not on the FY2025 list; down 2 since FY2022.
12	Alliance for Energy Innovation, LLC Top agencies DOE (Department of Energy) USAID (US Agency for International Development) OSD (Office of the Secretary of Defense)	$1,288,629,762	3.1%	Rank history: #13 in FY2021, #12 in FY2022, #8 in FY2024 and #13 in FY2025; unchanged since FY2022.
13	Mission Support & Test Services LLC Top agencies DOE (Department of Energy) DFAS (Defense Finance and Accounting Service) USAF (Department of the Air Force)	$837,756,290	2.0%	Rank history: #10 in FY2021, #11 in FY2022, #9 in FY2024 and #12 in FY2025; down 2 since FY2022.
14	Brookhaven Science Associates LLC Top agencies DOE (Department of Energy)	$789,434,033	1.9%	Rank history: #11 in FY2021, #10 in FY2022, #12 in FY2024 and #14 in FY2025; down 4 since FY2022.
15	Leidos Holdings, Inc. 3 awardees, including Leidos Biomedical Research Inc. and Leidos, Inc. Top agencies HHS (Department of Health and Human Services) NSF (National Science Foundation) Army (Department of the Army)	$774,258,996	1.9%	Rank history: #12 in FY2021, #13 in FY2022, #17 in FY2024 and #19 in FY2025; down 2 since FY2022.
16	The Leland Stanford Junior University Top agencies DOE (Department of Energy) USAF (Department of the Air Force) DARPA (Defense Advanced Research Projects Agency)	$623,385,737	1.5%	Rank history: #14 in FY2021, #14 in FY2022, #14 in FY2024 and #16 in FY2025; down 2 since FY2022.
17	Deployed Resources LLC Top agencies DHS (Department of Homeland Security)	$519,065,733	1.3%	Rank history: #15 in FY2021, #15 in FY2022, #15 in FY2024 and #58 in FY2025; down 2 since FY2022.
18	Amentum Services, Inc. 2 awardees, including Dyncorp International LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$266,959,470	0.6%	Rank history: #43 in FY2021, #21 in FY2022, #20 in FY2024 and not on the FY2025 list; up 3 since FY2022.
19	Jefferson Science Associates, LLC Top agencies DOE (Department of Energy)	$219,952,512	0.5%	Rank history: #20 in FY2021, #17 in FY2022, #22 in FY2024 and #22 in FY2025; down 2 since FY2022.
20	BAE Systems PLC 2 awardees, including BAE Systems Ordnance Systems Inc. and BAE Systems Technology Solutions & Services Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$209,286,161	0.5%	Rank history: #35 in FY2021, #66 in FY2022, #25 in FY2024 and #41 in FY2025; up 46 since FY2022.
21	Sodexo Management Inc. Top agencies Navy (Department of the Navy)	$208,753,700	0.5%	Rank history: not on the FY2021 list, #22 in FY2022, #21 in FY2024 and #20 in FY2025; up 1 since FY2022.
22	Chas Kurz & Co Inc 2 awardees, including Keystone Shipping Services, Inc. and Keystone Shipping Co Top agencies Navy (Department of the Navy) OSD (Office of the Secretary of Defense) DOT (Department of Transportation)	$187,552,760	0.5%	Rank history: #31 in FY2021, #27 in FY2022, #58 in FY2024 and not on the FY2025 list; up 5 since FY2022.
23	IES Downstream LLC Top agencies DLA (Defense Logistics Agency)	$172,133,899	0.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
24	The Trustees of Princeton University Top agencies DOE (Department of Energy) NASA (National Aeronautics and Space Administration)	$160,858,110	0.4%	Rank history: #22 in FY2021, #19 in FY2022, #27 in FY2024 and #21 in FY2025; down 5 since FY2022.
25	Nustar Energy LP 2 awardees, including Shore Terminals LLC and Nustar Terminals Operations Partnership L.P. Top agencies DLA (Defense Logistics Agency)	$150,474,927	0.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
26	Syncom Space Services LLC Top agencies NASA (National Aeronautics and Space Administration) Navy (Department of the Navy) DFAS (Defense Finance and Accounting Service)	$146,326,083	0.4%	Rank history: #18 in FY2021, #18 in FY2022, #43 in FY2024 and not on the FY2025 list; down 8 since FY2022.
27	Goodwill Industries of Southeastern Wisconsin, Inc. Top agencies Navy (Department of the Navy)	$141,488,509	0.3%	Rank history: #26 in FY2021, #28 in FY2022, #61 in FY2024 and #24 in FY2025; up 1 since FY2022.
28	Mid-America Conversion Services, LLC Top agencies DOE (Department of Energy)	$126,437,600	0.3%	Rank history: #23 in FY2021, #25 in FY2022, #28 in FY2024 and #31 in FY2025; down 3 since FY2022.
29	The Day & Zimmermann Group, Inc. 3 awardees, including American Ordnance LLC Top agencies Army (Department of the Army)	$113,749,407	0.3%	Rank history: #49 in FY2021, #65 in FY2022 and not on the FY2024–FY2025 lists; up 36 since FY2022.
30	Iowa State University of Science and Technology Top agencies DOE (Department of Energy)	$103,297,256	0.3%	Rank history: #41 in FY2021, #38 in FY2022, #48 in FY2024 and #29 in FY2025; up 8 since FY2022.
31	LDRM LLC 2 awardees Top agencies DOS (Department of State)	$97,410,896	0.2%	Rank history: #33 in FY2021, #33 in FY2022, #37 in FY2024 and #32 in FY2025; up 2 since FY2022.
32	Saltchuk Resources, Inc. Through Tote Services, LLC Top agencies Navy (Department of the Navy) MDA (DOD Missile Defense Agency) DOT (Department of Transportation)	$88,663,126	0.2%	Rank history: #28 in FY2021, #37 in FY2022, #86 in FY2024 and not on the FY2025 list; up 5 since FY2022.
33	Pride Industries Top agencies Army (Department of the Army) DMA (Defense Media Activity)	$82,855,468	0.2%	Rank history: #29 in FY2021, #32 in FY2022, #36 in FY2024 and not on the FY2025 list; down 1 since FY2022.
34	KBR Services LLC Top agencies USAF (Department of the Air Force)	$82,652,275	0.2%	Rank history: not on the FY2021–FY2022 lists, #55 in FY2024 and not on the FY2025 list; new.
35	Robinson Aviation (Rva), Inc. Top agencies DOT (Department of Transportation)	$80,524,505	0.2%	Rank history: #39 in FY2021, #39 in FY2022, #35 in FY2024 and #35 in FY2025; up 4 since FY2022.
36	Indyne, Inc. Top agencies USAF (Department of the Air Force) OSD (Office of the Secretary of Defense) MDA (DOD Missile Defense Agency)	$78,529,760	0.2%	Rank history: #34 in FY2021, #30 in FY2022, #34 in FY2024 and #33 in FY2025; down 6 since FY2022.
37	Koa Lani JV LLC Top agencies Navy (Department of the Navy)	$74,619,739	0.2%	Rank history: #52 in FY2021, #31 in FY2022, #42 in FY2024 and #39 in FY2025; down 6 since FY2022.
38	Tlingit Haida Tribal Business Corporation 2 awardees, including T&H Services, LLC and Kira Training Services LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$73,958,160	0.2%	Rank history: #36 in FY2021, #36 in FY2022, #50 in FY2024 and not on the FY2025 list; down 2 since FY2022.
39	Midwest Air Traffic Control Service Inc Top agencies DOT (Department of Transportation) Navy (Department of the Navy)	$72,688,298	0.2%	Rank history: #45 in FY2021, #43 in FY2022, #38 in FY2024 and #37 in FY2025; up 4 since FY2022.
40	CAE Inc. Through CAE USA Inc. Top agencies USAF (Department of the Air Force)	$67,756,285	0.2%	Rank history: #61 in FY2021, #44 in FY2022 and not on the FY2024–FY2025 lists; up 4 since FY2022.
41	Matson Navigation Company Inc. 2 awardees Top agencies Navy (Department of the Navy)	$64,793,940	0.2%	Rank history: #78 in FY2021, #53 in FY2022, #88 in FY2024 and not on the FY2025 list; up 12 since FY2022.
42	CGI Technologies and Solutions Inc. Through CGI Federal Inc. Top agencies DOS (Department of State)	$63,942,751	0.2%	Rank history: #58 in FY2021, #50 in FY2022 and not on the FY2024–FY2025 lists; up 8 since FY2022.
43	Pacific-Gulf Marine, Inc. Top agencies Navy (Department of the Navy) OSD (Office of the Secretary of Defense)	$63,254,353	0.2%	Rank history: #64 in FY2021, #45 in FY2022, #53 in FY2024 and #53 in FY2025; up 2 since FY2022.
44	Ocean Shipholdings, Inc. Top agencies Navy (Department of the Navy)	$60,469,052	0.1%	Rank history: not on the FY2021–FY2022 lists, #51 in FY2024 and #63 in FY2025; up 161 since FY2022.
45	Management & Training Corporation Top agencies DOL (Department of Labor)	$60,421,350	0.1%	Rank history: #16 in FY2021, #24 in FY2022 and not on the FY2024–FY2025 lists; down 21 since FY2022.
46	Science Applications International Corporation Top agencies USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration) NTSB (National Transportation Safety Board)	$57,692,063	0.1%	Rank history: #99 in FY2021, not on the FY2022 list, #30 in FY2024 and #40 in FY2025; up 58 since FY2022.
47	Crowley Government Services Inc. 2 awardees Top agencies Navy (Department of the Navy)	$56,669,805	0.1%	Rank history: #19 in FY2021, #47 in FY2022, #39 in FY2024 and #56 in FY2025; unchanged since FY2022.
48	Patriot Contract Services, LLC Top agencies Navy (Department of the Navy) DOT (Department of Transportation) Army (Department of the Army)	$53,311,930	0.1%	Rank history: #38 in FY2021, #63 in FY2022, #26 in FY2024 and #25 in FY2025; up 15 since FY2022.
49	Vectrus Systems Corporation 2 awardees, including Vectrus Services A / S Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$53,146,221	0.1%	Rank history: #27 in FY2021, #71 in FY2022 and not on the FY2024–FY2025 lists; up 22 since FY2022.
50	Bowhead Logistics Management, LLC Top agencies Army (Department of the Army)	$52,660,764	0.1%	Rank history: #24 in FY2021, #67 in FY2022, #78 in FY2024 and #79 in FY2025; up 17 since FY2022.
51	Arctic Slope Regional Corporation Through Asrc Federal Field Services, LLC Top agencies DHS (Department of Homeland Security)	$50,940,602	0.1%	Rank history: #59 in FY2021, #49 in FY2022, #89 in FY2024 and #47 in FY2025; down 2 since FY2022.
52	The GEO Group, Inc. 2 awardees, including GEO Secure Services, LLC Top agencies DOJ (Department of Justice)	$50,782,150	0.1%	Rank history: #48 in FY2021, #40 in FY2022, #29 in FY2024 and #30 in FY2025; down 12 since FY2022.
53	State Health Services Texas Department of Through Texas Workforce Commission Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$50,622,935	0.1%	Rank history: not on the FY2021 list, #99 in FY2022 and not on the FY2024–FY2025 lists; up 46 since FY2022.
54	South Carolina State of Through South Carolina Commission for Blind Top agencies Army (Department of the Army)	$48,592,764	0.1%	Rank history: #71 in FY2021, #59 in FY2022 and not on the FY2024–FY2025 lists; up 5 since FY2022.
55	Serco North America (Holdings) Inc Through Serco Inc. Top agencies DOT (Department of Transportation) USAF (Department of the Air Force)	$43,623,527	0.1%	Rank history: #55 in FY2021, #46 in FY2022 and not on the FY2024–FY2025 lists; down 9 since FY2022.
56	Georgia State of Through Georgia Vocational Rehabilitation Agency Top agencies Army (Department of the Army) DHS (Department of Homeland Security) Navy (Department of the Navy)	$40,487,034	0.1%	Rank history: #67 in FY2021, #60 in FY2022, #73 in FY2024 and not on the FY2025 list; up 4 since FY2022.
57	Ocean Duchess, Inc. Top agencies Navy (Department of the Navy) OSD (Office of the Secretary of Defense)	$39,236,878	0.1%	Rank history: #44 in FY2021, #72 in FY2022, #66 in FY2024 and #62 in FY2025; up 15 since FY2022.
58	Cherokee Nation 3 awardees, including Cherokee Nation Management & Consulting, L.l.c.. and Cherokee Nation Strategic Programs, L.L.C. Top agencies Navy (Department of the Navy) DOL (Department of Labor) Army (Department of the Army)	$39,009,802	0.1%	Rank history: #70 in FY2021, #55 in FY2022 and not on the FY2024–FY2025 lists; down 3 since FY2022.
59	HP Enterprise Services LLC Through Peraton Inc. Top agencies NASA (National Aeronautics and Space Administration)	$38,189,970	0.1%	Rank history: not on the FY2021 list, #76 in FY2022 and not on the FY2024–FY2025 lists; up 17 since FY2022.
60	Bering Straits Native Corporation Through Arcticom, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$37,553,832	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
61	TK & K Services LLC Top agencies DLA (Defense Logistics Agency)	$36,239,423	0.1%	Rank history: #89 in FY2021, #61 in FY2022, not on the FY2024 list and #95 in FY2025; unchanged since FY2022.
62	Southern Foodservice Management Inc. Top agencies Army (Department of the Army) DHS (Department of Homeland Security)	$36,236,629	0.1%	Rank history: not on the FY2021 list, #98 in FY2022, #83 in FY2024 and #57 in FY2025; up 36 since FY2022.
63	Adams and Associates Inc. Top agencies DOL (Department of Labor)	$35,515,257	0.1%	Rank history: #32 in FY2021, #35 in FY2022, not on the FY2024 list and #77 in FY2025; down 28 since FY2022.
64	Jacobs Engineering Group Inc. 2 awardees, including Amentum Technology, Inc. Top agencies NASA (National Aeronautics and Space Administration) MDA (DOD Missile Defense Agency)	$35,137,873	0.1%	Rank history: #42 in FY2021, #42 in FY2022, #94 in FY2024 and not on the FY2025 list; down 22 since FY2022.
65	Regents of the University of California the (4458) Top agencies DOE (Department of Energy)	$32,232,444	0.1%	Rank history: #47 in FY2021, #94 in FY2022, #69 in FY2024 and #71 in FY2025; up 29 since FY2022.
66	American Ordnance LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$29,418,688	0.1%	Rank history: #65 in FY2021, #41 in FY2022 and not on the FY2024–FY2025 lists; down 25 since FY2022.
67	Tsay Professional Services, Inc. Top agencies Army (Department of the Army)	$28,888,280	0.1%	Rank history: #60 in FY2021, #51 in FY2022, #74 in FY2024 and #65 in FY2025; down 16 since FY2022.
68	Ranger Land Systems, Inc. Top agencies DHS (Department of Homeland Security)	$28,004,402	0.1%	Rank history: not on the FY2021 list, #34 in FY2022, #87 in FY2024 and not on the FY2025 list; down 34 since FY2022.
69	Aleut O&M Services, LLC Top agencies Army (Department of the Army)	$27,111,528	0.1%	Rank history: #84 in FY2021, #79 in FY2022, #64 in FY2024 and #78 in FY2025; up 10 since FY2022.
70	RTX Corporation Through Raytheon Company Top agencies Navy (Department of the Navy)	$25,715,920	0.1%	Rank history: #74 in FY2021, #74 in FY2022 and not on the FY2024–FY2025 lists; up 4 since FY2022.
71	Missouri State of Through Missouri Department of Social Services Top agencies Army (Department of the Army)	$24,017,046	0.1%	Rank history: #77 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 49 since FY2022.
72	Professional Contract Services, Inc. Top agencies Army (Department of the Army)	$23,558,704	0.1%	Rank history: not on the FY2021–FY2022 lists, #70 in FY2024 and #80 in FY2025; up 115 since FY2022.
73	Kgjj Engineering Solutions, LLC Top agencies Army (Department of the Army)	$22,714,543	0.1%	Rank history: not on the FY2021–FY2022 lists, #80 in FY2024 and #43 in FY2025; up 118 since FY2022.
74	Serrato Corporation Top agencies DOL (Department of Labor)	$22,634,200	0.1%	Rank history: #46 in FY2021, #68 in FY2022 and not on the FY2024–FY2025 lists; down 6 since FY2022.
75	Four Seasons Environmental Inc. Top agencies HHS (Department of Health and Human Services)	$22,308,592	0.1%	Rank history: #63 in FY2021, #57 in FY2022, not on the FY2024 list and #46 in FY2025; down 18 since FY2022.
76	Serco Inc Top agencies DOT (Department of Transportation) USAF (Department of the Air Force)	$22,266,876	0.1%	Rank history: not on the FY2021–FY2022 lists, #46 in FY2024 and #50 in FY2025; new.
77	R & D Maintenance Services Inc. Top agencies Army (Department of the Army)	$21,375,936	0.1%	Rank history: not on the FY2021–FY2022 lists, #54 in FY2024 and #60 in FY2025; new.
78	Virginia Polytechnic Institute & State University 3 awardees, including Blind and Vision Impaired, Virginia Department for The and Virginia Department of Environmental Quality Top agencies Army (Department of the Army)	$18,729,523	<0.1%	Rank history: not on the FY2021–FY2022 lists, #91 in FY2024 and not on the FY2025 list; new.
79	The Chenega Corporation 2 awardees, including Chenega Facilities Management LLC and Chenega Global Protection, LLC Top agencies Army (Department of the Army) DOS (Department of State)	$16,936,032	<0.1%	Rank history: #82 in FY2021, #86 in FY2022 and not on the FY2024–FY2025 lists; up 7 since FY2022.
80	At2, LLC Top agencies USAF (Department of the Air Force)	$16,424,532	<0.1%	Rank history: #96 in FY2021, #87 in FY2022, #90 in FY2024 and #90 in FY2025; up 7 since FY2022.
81	Melwood Horticultural Training Center, Inc. Top agencies Army (Department of the Army) USDA (Department of Agriculture) DOJ (Department of Justice)	$16,341,379	<0.1%	Rank history: not on the FY2021 list, #73 in FY2022, #82 in FY2024 and #68 in FY2025; down 8 since FY2022.
82	The Pasha Group Through Pasha Hawaii Holdings LLC Top agencies Navy (Department of the Navy)	$15,505,278	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 37 since FY2022.
83	OWL Companies Through Career Systems Development Corporation Top agencies DOL (Department of Labor)	$15,369,953	<0.1%	Rank history: #37 in FY2021, #62 in FY2022 and not on the FY2024–FY2025 lists; down 21 since FY2022.
84	Afognak Native Corporation 2 awardees, including "Alutiiq Logistics & Maintenance Services, Llc" and Alutiiq Essential Services LLC Top agencies DOE (Department of Energy) NASA (National Aeronautics and Space Administration) Army (Department of the Army)	$15,068,855	<0.1%	Rank history: #90 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 46 since FY2022.
85	Human Learning Systems LLC Top agencies DOL (Department of Labor)	$14,737,382	<0.1%	Rank history: #88 in FY2021, #64 in FY2022 and not on the FY2024–FY2025 lists; down 21 since FY2022.
86	El Dorado Resort Co.,Ltd. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$14,732,876	<0.1%	Rank history: #81 in FY2021, #89 in FY2022 and not on the FY2024–FY2025 lists; up 3 since FY2022.
87	Mercury Air Group, Inc. 2 awardees, including Maytag Aircraft LLC Top agencies DLA (Defense Logistics Agency)	$14,488,374	<0.1%	Rank history: #87 in FY2021, #56 in FY2022 and not on the FY2024–FY2025 lists; down 31 since FY2022.
88	Veolia Water North America-West LLC 3 awardees, including Veolia Water West Operating Services Inc., VNS Federal Services LLC and Veolia Es Technical Solutions LLC Top agencies IBWC (International Boundary and Water Commission U.S.-Mexico) DOI (Department of the Interior) USAF (Department of the Air Force)	$14,035,953	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 17 since FY2022.
89	Solution One Industries, Inc. Top agencies USAF (Department of the Air Force) EPA (Environmental Protection Agency)	$13,858,518	<0.1%	Rank history: #94 in FY2021, #96 in FY2022, #93 in FY2024 and #98 in FY2025; up 7 since FY2022.
90	Par Pacific Holdings, Inc. Through Par Hawaii Refining LLC Top agencies DLA (Defense Logistics Agency)	$13,608,776	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
91	Chevron Corporation 3 awardees, including Chevron Al Khalij Top agencies DLA (Defense Logistics Agency)	$13,518,305	<0.1%	Rank history: not on the FY2021 list, #58 in FY2022 and not on the FY2024–FY2025 lists; down 33 since FY2022.
92	Instituto Nacional De Tecnica Aeroespacial Esteban Terradas MDE Top agencies NASA (National Aeronautics and Space Administration)	$13,394,128	<0.1%	Rank history: not on the FY2021 list, #75 in FY2022, #97 in FY2024 and #81 in FY2025; down 17 since FY2022.
93	Aptim Federal Services LLC Top agencies Navy (Department of the Navy)	$12,593,745	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 22 since FY2022.
94	AL. Dept. of Public Health Through Alabama Department of Rehabilitation Services Top agencies Army (Department of the Army) DHS (Department of Homeland Security) USAF (Department of the Air Force)	$12,382,042	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 76 since FY2022.
95	Skookum Educational Programs Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$12,176,091	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 19 since FY2022.
96	Lonza Group AG Through Calca Solutions, LLC Top agencies DLA (Defense Logistics Agency)	$11,971,070	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
97	King & George, LLC 2 awardees, including Invicta Global, LLC Top agencies DOT (Department of Transportation) Army (Department of the Army) Navy (Department of the Navy)	$11,857,625	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 343 since FY2022.
98	Management & Technology Solutions Inc. Top agencies Navy (Department of the Navy)	$11,604,190	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 52 since FY2022.
99	At&T Inc. Through At&T Enterprises, LLC Top agencies USAID (US Agency for International Development)	$11,183,099	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 13 since FY2022.
100	Chugach Training and Educational Solutions, LLC Top agencies DOL (Department of Labor)	$11,021,671	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 52 since FY2022.

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100 of 1,038 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	$15,448,407,078	Honeywell International Inc.
M1AZ Operation of Other Administrative Facilities and Service Buildings	$986,509,661	Deployed Resources LLC
M1FD Operation of Dining Facilities	$684,167,622	Sodexo Management Inc.
M1PZ Operation of Other Non-Building Facilities	$680,614,575	Chas Kurz & Co Inc
M1NA Operation of Fuel Supply Facilities	$435,940,665	IES Downstream LLC
M1GZ Operation of Other Warehouse Buildings	$226,922,355	Amentum Services, Inc.
M1AA Operation of Office Buildings	$49,566,744	Tunista Logistics Solutions LLC
M1PA Operation of Recreation Facilities (Non-Building)	$42,763,420	R & D Maintenance Services Inc.
M1LZ Operation of Parking Facilities	$25,795,373	In & Out Valet Co
M1ND Operation of Sewage and Waste Facilities	$23,100,526	Veolia Water North America-West LLC
M1NE Operation of Water Supply Facilities	$18,472,281	Gana-A' Yoo, Limited
M1AB Operation of Conference Space and Facilities	$14,995,724	Aramark Uniform & Career Apparel 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 $41.3 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. 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 2023 ran Oct 1, 2022 – Sep 30, 2023. 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 FY2022. "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 FY2022 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 FY2023?

1. Honeywell International Inc. ($6.5B), 2. Triad National Security LLC ($4.58B), 3. Consolidated Nuclear Security, LLC ($3.33B), 4. Ut-Battelle LLC ($2.71B), 5. Savannah River Nuclear Solutions LLC ($2.54B), 6. Battelle Energy Alliance, LLC ($2.23B), 7. Fluor Corporation ($2B), 8. Government of the United States ($1.86B), 9. Battelle Memorial Institute ($1.59B), 10. General Dynamics Corporation ($1.44B).

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