Top 100 Contractors in PSC M1: Operate Government Owned Buildings, FY2024

Name: Top 100 Contractors in PSC M1: Operate Government Owned Buildings, FY2024
Creator: GovTribe

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

The top 10 won 67% of FY2024 PSC M1 contract dollars

Contract obligations: $39,595,642,502 Net of deobligations, by contracts coded PSC M1 or a code under it
Contractors: 1,083 Parent companies with an obligation
Largest contractor: Honeywell International Inc. $6.08 billion, 14.4% 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. 4 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)	$6,082,536,060	14.4%	Rank history: #1 in FY2021, #1 in FY2022, #1 in FY2023 and #1 in FY2025; unchanged since FY2023.
2	Triad National Security LLC Top agencies DOE (Department of Energy) USAF (Department of the Air Force) DTRA (Defense Threat Reduction Agency)	$5,162,951,227	12.2%	Rank history: #2 in FY2021, #2 in FY2022, #2 in FY2023 and #2 in FY2025; unchanged since FY2023.
3	Fluor Corporation 3 awardees, including Savannah River Nuclear Solutions LLC and Fluor Marine Propulsion, LLC Top agencies DOE (Department of Energy)	$3,777,737,278	8.9%	Rank history: #7 in FY2021, #8 in FY2022, #7 in FY2023 and #3 in FY2025; up 4 since FY2023.
4	Consolidated Nuclear Security, LLC Top agencies DOE (Department of Energy) USAF (Department of the Air Force) OSD (Office of the Secretary of Defense)	$3,649,011,102	8.6%	Rank history: #4 in FY2021, #3 in FY2022, #3 in FY2023 and #6 in FY2025; down 1 since FY2023.
5	Battelle Memorial Institute 3 awardees, including Battelle Energy Alliance, LLC Top agencies DOE (Department of Energy) DOT (Department of Transportation)	$2,677,265,638	6.3%	Rank history: #3 in FY2021, #4 in FY2022, #9 in FY2023 and #4 in FY2025; up 4 since FY2023.
6	Ut-Battelle LLC Top agencies DOE (Department of Energy)	$2,546,284,451	6.0%	Rank history: #5 in FY2021, #5 in FY2022, #4 in FY2023 and #5 in FY2025; down 2 since FY2023.
7	The Regents of the University of California Top agencies DOE (Department of Energy) DHA (Defense Health Agency)	$1,210,815,052	2.9%	Rank history: not on the FY2021–FY2023 lists and #9 in FY2025; new.
8	Alliance for Energy Innovation, LLC Top agencies DOE (Department of Energy) USAID (US Agency for International Development) WHS (DOD Washington Headquarters Service)	$1,167,681,745	2.8%	Rank history: #13 in FY2021, #12 in FY2022, #12 in FY2023 and #13 in FY2025; up 4 since FY2023.
9	Mission Support & Test Services LLC Top agencies DOE (Department of Energy) Army (Department of the Army) USAF (Department of the Air Force)	$1,113,406,099	2.6%	Rank history: #10 in FY2021, #11 in FY2022, #13 in FY2023 and #12 in FY2025; up 4 since FY2023.
10	Uchicago Argonne, LLC Top agencies DOE (Department of Energy) HHS (Department of Health and Human Services) DHS (Department of Homeland Security)	$1,026,717,534	2.4%	Rank history: not on the FY2021–FY2023 lists and #11 in FY2025; new.
11	Battelle Energy Alliance, LLC Top agencies DOE (Department of Energy)	$802,657,951	1.9%	Rank history: not on the FY2021 list, #20 in FY2022, #6 in FY2023 and not on the FY2025 list; down 5 since FY2023.
12	Brookhaven Science Associates LLC Top agencies DOE (Department of Energy)	$797,151,609	1.9%	Rank history: #11 in FY2021, #10 in FY2022, #14 in FY2023 and #14 in FY2025; up 2 since FY2023.
13	National Technology & Engineering Solutions of Sandia, LLC Top agencies DOE (Department of Energy) USAF (Department of the Air Force)	$738,382,472	1.7%	Rank history: not on the FY2021 list, #83 in FY2022, not on the FY2023 list and not on the FY2025 list; returned.
14	The Leland Stanford Junior University Top agencies DOE (Department of Energy) USAF (Department of the Air Force) DARPA (Defense Advanced Research Projects Agency)	$699,460,276	1.7%	Rank history: #14 in FY2021, #14 in FY2022, #16 in FY2023 and #16 in FY2025; up 2 since FY2023.
15	Deployed Resources LLC Top agencies DHS (Department of Homeland Security)	$573,730,561	1.4%	Rank history: #15 in FY2021, #15 in FY2022, #17 in FY2023 and #58 in FY2025; up 2 since FY2023.
16	Fermi Research Alliance, LLC Top agencies DOE (Department of Energy)	$549,713,035	1.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
17	Leidos Holdings, Inc. 3 awardees, including Leidos, Inc. and Leidos Biomedical Research Inc. Top agencies NSF (National Science Foundation) HHS (Department of Health and Human Services) Army (Department of the Army)	$520,903,380	1.2%	Rank history: #12 in FY2021, #13 in FY2022, #15 in FY2023 and #19 in FY2025; down 2 since FY2023.
18	General Dynamics Corporation 2 awardees, including General Dynamics OTS (Wilkes Barre), LLC Top agencies Army (Department of the Army)	$386,201,865	0.9%	Rank history: not on the FY2021 list, #23 in FY2022, #10 in FY2023 and #28 in FY2025; down 8 since FY2023.
19	Government of the United States 3 awardees, including Fermi Research Alliance, LLC, Uchicago Argonne, LLC and 99 FSS Fsvl Top agencies DOE (Department of Energy) USAF (Department of the Air Force) DHS (Department of Homeland Security)	$354,912,937	0.8%	Rank history: #8 in FY2021, #7 in FY2022, #8 in FY2023 and not on the FY2025 list; down 11 since FY2023.
20	Amentum Services, Inc. 3 awardees, including Syncom Space Services LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$295,840,761	0.7%	Rank history: #43 in FY2021, #21 in FY2022, #18 in FY2023 and not on the FY2025 list; down 2 since FY2023.
21	Sodexo Management Inc. 2 awardees Top agencies Navy (Department of the Navy)	$271,227,048	0.6%	Rank history: not on the FY2021 list, #22 in FY2022, #21 in FY2023 and #20 in FY2025; unchanged since FY2023.
22	Jefferson Science Associates, LLC Top agencies DOE (Department of Energy) HHS (Department of Health and Human Services)	$213,801,445	0.5%	Rank history: #20 in FY2021, #17 in FY2022, #19 in FY2023 and #22 in FY2025; down 3 since FY2023.
23	Savannah River Nuclear Solutions LLC Top agencies DOE (Department of Energy)	$175,500,785	0.4%	Rank history: #6 in FY2021, #6 in FY2022, #5 in FY2023 and not on the FY2025 list; down 18 since FY2023.
24	State of California Controllers Office 2 awardees, including The Regents of the University of California Top agencies DOE (Department of Energy) DHA (Defense Health Agency)	$166,700,997	0.4%	Rank history: #9 in FY2021, #9 in FY2022, #11 in FY2023 and not on the FY2025 list; down 13 since FY2023.
25	BAE Systems 2 awardees, including BAE Systems Ordnance Systems Inc. Top agencies Army (Department of the Army)	$161,131,945	0.4%	Rank history: #35 in FY2021, #66 in FY2022, #20 in FY2023 and #41 in FY2025; down 5 since FY2023.
26	Patriot Contract Services, LLC Top agencies Navy (Department of the Navy) Army (Department of the Army) DOT (Department of Transportation)	$157,808,228	0.4%	Rank history: #38 in FY2021, #63 in FY2022, #48 in FY2023 and #25 in FY2025; up 22 since FY2023.
27	The Trustees of Princeton University Top agencies DOE (Department of Energy) DARPA (Defense Advanced Research Projects Agency)	$135,744,144	0.3%	Rank history: #22 in FY2021, #19 in FY2022, #24 in FY2023 and #21 in FY2025; down 3 since FY2023.
28	Mid-America Conversion Services, LLC Top agencies DOE (Department of Energy)	$131,041,286	0.3%	Rank history: #23 in FY2021, #25 in FY2022, #28 in FY2023 and #31 in FY2025; unchanged since FY2023.
29	The GEO Group, Inc. 2 awardees, including GEO Secure Services, LLC Top agencies DOJ (Department of Justice)	$124,977,226	0.3%	Rank history: #48 in FY2021, #40 in FY2022, #52 in FY2023 and #30 in FY2025; up 23 since FY2023.
30	Science Applications International Corporation 2 awardees Top agencies USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration) NTSB (National Transportation Safety Board)	$112,034,228	0.3%	Rank history: #99 in FY2021, not on the FY2022 list, #46 in FY2023 and #40 in FY2025; up 16 since FY2023.
31	Qatex Limited Top agencies DLA (Defense Logistics Agency)	$97,427,122	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
32	Tote Services, LLC Top agencies Navy (Department of the Navy) DOT (Department of Transportation) MDA (DOD Missile Defense Agency)	$96,450,410	0.2%	Rank history: not on the FY2021–FY2023 lists and #23 in FY2025; new.
33	Philippine Coastal Storage & Pipeline Corporation Top agencies DLA (Defense Logistics Agency)	$90,455,440	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
34	Indyne, Inc. Top agencies USAF (Department of the Air Force)	$90,447,552	0.2%	Rank history: #34 in FY2021, #30 in FY2022, #36 in FY2023 and #33 in FY2025; up 2 since FY2023.
35	Robinson Aviation (Rva), Inc. Top agencies DOT (Department of Transportation)	$89,862,241	0.2%	Rank history: #39 in FY2021, #39 in FY2022, #35 in FY2023 and #35 in FY2025; unchanged since FY2023.
36	Pride Industries Top agencies Army (Department of the Army) DMA (Defense Media Activity)	$80,096,167	0.2%	Rank history: #29 in FY2021, #32 in FY2022, #33 in FY2023 and not on the FY2025 list; down 3 since FY2023.
37	LDRM LLC Top agencies DOS (Department of State)	$77,894,803	0.2%	Rank history: #33 in FY2021, #33 in FY2022, #31 in FY2023 and #32 in FY2025; down 6 since FY2023.
38	Midwest Air Traffic Control Service Inc Top agencies DOT (Department of Transportation) Navy (Department of the Navy)	$77,361,145	0.2%	Rank history: #45 in FY2021, #43 in FY2022, #39 in FY2023 and #37 in FY2025; up 1 since FY2023.
39	Crowley Government Services, Inc. 2 awardees Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$77,269,169	0.2%	Rank history: #19 in FY2021, #47 in FY2022, #47 in FY2023 and #56 in FY2025; up 8 since FY2023.
40	CGI Federal Inc. Top agencies DOS (Department of State)	$77,246,991	0.2%	Rank history: not on the FY2021–FY2023 lists and #45 in FY2025; new.
41	Keystone Shipping Services, Inc. Top agencies Navy (Department of the Navy) DOT (Department of Transportation)	$73,392,795	0.2%	Rank history: not on the FY2021–FY2023 lists and #27 in FY2025; new.
42	Koa Lani JV LLC Top agencies Navy (Department of the Navy)	$70,612,465	0.2%	Rank history: #52 in FY2021, #31 in FY2022, #37 in FY2023 and #39 in FY2025; down 5 since FY2023.
43	Syncom Space Services LLC Top agencies NASA (National Aeronautics and Space Administration)	$70,123,365	0.2%	Rank history: #18 in FY2021, #18 in FY2022, #26 in FY2023 and not on the FY2025 list; down 17 since FY2023.
44	Amentum Holdings, Inc. 2 awardees, including Amentum Services, Inc. and Syncom Space Services LLC Top agencies Army (Department of the Army) NASA (National Aeronautics and Space Administration) Navy (Department of the Navy)	$69,120,381	0.2%	Rank history: not on the FY2021–FY2023 lists and #18 in FY2025; new.
45	CAE USA Inc. Top agencies USAF (Department of the Air Force)	$67,742,287	0.2%	Rank history: not on the FY2021–FY2023 lists and #38 in FY2025; new.
46	Serco Inc Top agencies DOT (Department of Transportation) USAF (Department of the Air Force)	$64,015,779	0.2%	Rank history: not on the FY2021–FY2022 lists, #76 in FY2023 and #50 in FY2025; up 30 since FY2023.
47	South Carolina Commission for Blind Top agencies Army (Department of the Army)	$61,788,861	0.1%	Rank history: not on the FY2021–FY2023 lists and #48 in FY2025; new.
48	Iowa State University of Science and Technology Top agencies DOE (Department of Energy)	$61,325,481	0.1%	Rank history: #41 in FY2021, #38 in FY2022, #30 in FY2023 and #29 in FY2025; down 18 since FY2023.
49	Motor Oil (Hellas) Corinth Refineries S.A. Top agencies DLA (Defense Logistics Agency)	$60,307,824	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 185 since FY2023.
50	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)	$59,653,662	0.1%	Rank history: #36 in FY2021, #36 in FY2022, #38 in FY2023 and not on the FY2025 list; down 12 since FY2023.
51	Ocean Shipholdings, Inc. Top agencies Navy (Department of the Navy)	$57,391,682	0.1%	Rank history: not on the FY2021–FY2022 lists, #44 in FY2023 and #63 in FY2025; down 7 since FY2023.
52	Georgia Vocational Rehabilitation Agency Top agencies Army (Department of the Army) DHS (Department of Homeland Security)	$55,194,316	0.1%	Rank history: not on the FY2021–FY2023 lists and #34 in FY2025; new.
53	Pacific-Gulf Marine, Inc. Top agencies Navy (Department of the Navy)	$53,534,503	0.1%	Rank history: #64 in FY2021, #45 in FY2022, #43 in FY2023 and #53 in FY2025; down 10 since FY2023.
54	R & D Maintenance Services Inc. 2 awardees Top agencies Army (Department of the Army)	$52,154,648	0.1%	Rank history: #85 in FY2021, #77 in FY2022, #77 in FY2023 and #60 in FY2025; up 23 since FY2023.
55	KBR Services LLC Top agencies USAF (Department of the Air Force)	$51,849,590	0.1%	Rank history: not on the FY2021–FY2022 lists, #34 in FY2023 and not on the FY2025 list; down 21 since FY2023.
56	McKesson Corporation Through Mckesson Medical-Surgical Government Solutions LLC Top agencies HHS (Department of Health and Human Services)	$51,138,600	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
57	Ranger Defense, Incorporated Through Ranger Land Systems, Inc. Top agencies DHS (Department of Homeland Security)	$46,390,139	0.1%	Rank history: not on the FY2021–FY2023 lists and #67 in FY2025; new.
58	Chas Kurz & Co Inc 2 awardees, including Keystone Shipping Services, Inc. and Keystone Shipping Co Top agencies Navy (Department of the Navy) DOT (Department of Transportation)	$45,613,627	0.1%	Rank history: #31 in FY2021, #27 in FY2022, #22 in FY2023 and not on the FY2025 list; down 36 since FY2023.
59	Peraton Inc. Top agencies NASA (National Aeronautics and Space Administration)	$45,488,098	0.1%	Rank history: not on the FY2021–FY2023 lists and #49 in FY2025; new.
60	Missouri Department of Social Services Top agencies Army (Department of the Army)	$44,719,959	0.1%	Rank history: not on the FY2021–FY2023 lists and #74 in FY2025; new.
61	Goodwill Industries of Southeastern Wisconsin, Inc. Top agencies Navy (Department of the Navy)	$42,919,825	0.1%	Rank history: #26 in FY2021, #28 in FY2022, #27 in FY2023 and #24 in FY2025; down 34 since FY2023.
62	Elk Solutions LLC Top agencies DLA (Defense Logistics Agency)	$41,540,112	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
63	Asrc Federal Field Services, LLC Top agencies DHS (Department of Homeland Security)	$39,773,232	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
64	Aleut O&M Services, LLC Top agencies Army (Department of the Army)	$36,481,239	0.1%	Rank history: #84 in FY2021, #79 in FY2022, #69 in FY2023 and #78 in FY2025; up 5 since FY2023.
65	RTX Corporation Through Raytheon Company Top agencies Navy (Department of the Navy)	$33,724,969	0.1%	Rank history: not on the FY2021–FY2023 lists and #54 in FY2025; up 161 since FY2023.
66	Ocean Duchess, Inc. Top agencies Navy (Department of the Navy) OSD (Office of the Secretary of Defense)	$33,107,423	0.1%	Rank history: #44 in FY2021, #72 in FY2022, #57 in FY2023 and #62 in FY2025; down 9 since FY2023.
67	Arcticom, LLC Top agencies Army (Department of the Army)	$31,571,932	0.1%	Rank history: not on the FY2021–FY2023 lists and #70 in FY2025; up 117 since FY2023.
68	Cherokee Nation Management & Consulting, L.l.c.. Top agencies Navy (Department of the Navy)	$29,946,970	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
69	Regents of the University of California the (4458) Top agencies DOE (Department of Energy)	$28,908,000	0.1%	Rank history: #47 in FY2021, #94 in FY2022, #65 in FY2023 and #71 in FY2025; down 4 since FY2023.
70	Professional Contract Services, Inc. Top agencies Army (Department of the Army)	$28,465,823	0.1%	Rank history: not on the FY2021–FY2022 lists, #72 in FY2023 and #80 in FY2025; up 2 since FY2023.
71	Department of Rehabilitation Services Top agencies Army (Department of the Army)	$27,581,948	0.1%	Rank history: not on the FY2021–FY2023 lists and #55 in FY2025; new.
72	KBR Wyle Services LLC 2 awardees, including KBR Services, LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$27,006,142	0.1%	Rank history: not on the FY2021–FY2023 lists and #36 in FY2025; new.
73	Georgia State of Through Georgia Vocational Rehabilitation Agency Top agencies DHS (Department of Homeland Security) Army (Department of the Army) Navy (Department of the Navy)	$25,377,515	0.1%	Rank history: #67 in FY2021, #60 in FY2022, #56 in FY2023 and not on the FY2025 list; down 17 since FY2023.
74	Tsay Professional Services, Inc. Top agencies Army (Department of the Army)	$25,336,859	0.1%	Rank history: #60 in FY2021, #51 in FY2022, #67 in FY2023 and #65 in FY2025; down 7 since FY2023.
75	Amentum Technology, Inc. Top agencies NASA (National Aeronautics and Space Administration)	$24,244,485	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
76	Mina Group Fzco Top agencies DLA (Defense Logistics Agency)	$23,697,760	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
77	Per Aarsleff A/S Through Inussuk A / S Top agencies USAF (Department of the Air Force)	$22,721,486	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
78	Bowhead Logistics Management, LLC Top agencies Army (Department of the Army)	$22,599,817	0.1%	Rank history: #24 in FY2021, #67 in FY2022, #50 in FY2023 and #79 in FY2025; down 28 since FY2023.
79	Inussuk A / S Top agencies USAF (Department of the Air Force)	$22,478,127	0.1%	Rank history: not on the FY2021–FY2023 lists and #42 in FY2025; up 26 since FY2023.
80	Kgjj Engineering Solutions, LLC Top agencies Army (Department of the Army)	$22,141,759	0.1%	Rank history: not on the FY2021–FY2022 lists, #73 in FY2023 and #43 in FY2025; down 7 since FY2023.
81	Pasha Hawaii Holdings LLC Top agencies Navy (Department of the Navy)	$21,459,022	0.1%	Rank history: not on the FY2021–FY2023 lists and #64 in FY2025; up 210 since FY2023.
82	Melwood Horticultural Training Center, Inc. Top agencies Army (Department of the Army) DOJ (Department of Justice)	$21,276,836	0.1%	Rank history: not on the FY2021 list, #73 in FY2022, #81 in FY2023 and #68 in FY2025; down 1 since FY2023.
83	Southern Foodservice Management Inc. Top agencies Army (Department of the Army) DHS (Department of Homeland Security)	$20,857,207	<0.1%	Rank history: not on the FY2021 list, #98 in FY2022, #62 in FY2023 and #57 in FY2025; down 21 since FY2023.
84	Garco Construction, Inc. Top agencies Army (Department of the Army)	$19,687,000	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
85	Commonwealth Scientific and Industrial Research Organisation Top agencies NASA (National Aeronautics and Space Administration)	$18,710,813	<0.1%	Rank history: not on the FY2021–FY2023 lists and #73 in FY2025; up 40 since FY2023.
86	Saltchuk Resources, Inc. Through Tote Services, LLC Top agencies Navy (Department of the Navy) MDA (DOD Missile Defense Agency)	$18,428,285	<0.1%	Rank history: #28 in FY2021, #37 in FY2022, #32 in FY2023 and not on the FY2025 list; down 54 since FY2023.
87	Ranger Land Systems, Inc. Top agencies DHS (Department of Homeland Security)	$18,000,000	<0.1%	Rank history: not on the FY2021 list, #34 in FY2022, #68 in FY2023 and not on the FY2025 list; down 19 since FY2023.
88	Matson Navigation Company Inc. Top agencies Navy (Department of the Navy)	$17,673,705	<0.1%	Rank history: #78 in FY2021, #53 in FY2022, #41 in FY2023 and not on the FY2025 list; down 47 since FY2023.
89	Arctic Slope Regional Corporation 2 awardees, including Asrc Federal Field Services, LLC and Asrc Communications, Ltd. Top agencies DHS (Department of Homeland Security) USAF (Department of the Air Force)	$17,213,770	<0.1%	Rank history: #59 in FY2021, #49 in FY2022, #51 in FY2023 and #47 in FY2025; down 38 since FY2023.
90	At2, LLC Top agencies USAF (Department of the Air Force)	$17,187,591	<0.1%	Rank history: #96 in FY2021, #87 in FY2022, #80 in FY2023 and #90 in FY2025; down 10 since FY2023.
91	Virginia Polytechnic Institute & State University 2 awardees, including Blind and Vision Impaired, Virginia Department for The and Virginia Department of Environmental Quality Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$16,409,948	<0.1%	Rank history: not on the FY2021–FY2022 lists, #78 in FY2023 and not on the FY2025 list; down 13 since FY2023.
92	Tunista Logistics Solutions LLC Top agencies USAF (Department of the Air Force) OSD (Office of the Secretary of Defense) DFAS (Defense Finance and Accounting Service)	$15,913,836	<0.1%	Rank history: not on the FY2021–FY2023 lists and #75 in FY2025; up 17 since FY2023.
93	Solution One Industries, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) EPA (Environmental Protection Agency)	$15,125,128	<0.1%	Rank history: #94 in FY2021, #96 in FY2022, #89 in FY2023 and #98 in FY2025; down 4 since FY2023.
94	Jacobs Engineering Group Inc. 2 awardees, including Amentum Technology, Inc. Top agencies NASA (National Aeronautics and Space Administration) MDA (DOD Missile Defense Agency)	$15,104,179	<0.1%	Rank history: #42 in FY2021, #42 in FY2022, #64 in FY2023 and not on the FY2025 list; down 30 since FY2023.
95	LB & B Associates Inc. Top agencies DLA (Defense Logistics Agency)	$15,046,435	<0.1%	Rank history: #95 in FY2021, #78 in FY2022, not on the FY2023 list and not on the FY2025 list; up 90 since FY2023.
96	Emcor Group Inc. Through Emcor Government Services, Inc. Top agencies DOE (Department of Energy)	$15,044,131	<0.1%	Rank history: not on the FY2021–FY2023 lists and #96 in FY2025; up 6 since FY2023.
97	Instituto Nacional De Tecnica Aeroespacial Esteban Terradas MDE Top agencies NASA (National Aeronautics and Space Administration)	$14,809,452	<0.1%	Rank history: not on the FY2021 list, #75 in FY2022, #92 in FY2023 and #81 in FY2025; down 5 since FY2023.
98	Louis Berger U.S. Inc. 2 awardees, including VGS Aircraft Services, Inc. and VGS Infrastructure Services Inc. Top agencies USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$14,256,379	<0.1%	Rank history: #73 in FY2021, #85 in FY2022, not on the FY2023 list and not on the FY2025 list; up 3 since FY2023.
99	Guidehouse Inc. Through Aptim Federal Services, LLC Top agencies Navy (Department of the Navy)	$13,417,758	<0.1%	Rank history: not on the FY2021–FY2023 lists and #92 in FY2025; new.
100	Blind and Vision Impaired, Virginia Department for The Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$13,095,524	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.

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100 of 1,083 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	$16,990,880,103	Honeywell International Inc.
M1AZ Operation of Other Administrative Facilities and Service Buildings	$994,099,333	Deployed Resources LLC
M1FD Operation of Dining Facilities	$749,283,281	Sodexo Management Inc.
M1PZ Operation of Other Non-Building Facilities	$668,884,766	Patriot Contract Services, LLC
M1NA Operation of Fuel Supply Facilities	$404,196,289	Qatex Limited
M1GZ Operation of Other Warehouse Buildings	$262,733,091	Amentum Services, Inc.
M1PA Operation of Recreation Facilities (Non-Building)	$68,092,749	R & D Maintenance Services Inc.
M1AA Operation of Office Buildings	$51,973,809	Tunista Logistics Solutions LLC
M1LZ Operation of Parking Facilities	$26,263,562	In & Out Valet Co
M1ND Operation of Sewage and Waste Facilities	$21,949,249	Veolia Water West Operating Services Inc.
M1AB Operation of Conference Space and Facilities	$19,988,938	National Capitol Contracting, 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 $42.3 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 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 PSC M1 contractors in FY2024?

1. Honeywell International Inc. ($6.08B), 2. Triad National Security LLC ($5.16B), 3. Fluor Corporation ($3.78B), 4. Consolidated Nuclear Security, LLC ($3.65B), 5. Battelle Memorial Institute ($2.68B), 6. Ut-Battelle LLC ($2.55B), 7. The Regents of the University of California ($1.21B), 8. Alliance for Energy Innovation, LLC ($1.17B), 9. Mission Support & Test Services LLC ($1.11B), 10. Uchicago Argonne, LLC ($1.03B).

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