Top 100 Contractors in NAICS 56161: Investigation, Guard, and Armored Car Services, Jul 2025–Jun 2026

Name: Top 100 Contractors in NAICS 56161: Investigation, Guard, and Armored Car Services, 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 45% of NAICS 56161 contract dollars from July 2025 through June 2026

Contract obligations: $7,757,860,731 Net of deobligations, by contracts coded NAICS 56161 or a code under it
Contractors: 823 Parent companies with an obligation
Largest contractor: The GEO Group, Inc. $535 million, 6.6% 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	The GEO Group, Inc. 3 awardees, including GEO Transport, Inc. and B.i. Incorporated Top agencies DHS (Department of Homeland Security) DOJ (Department of Justice)	$535,137,281	6.6%	Rank history: #9 in FY2021, #4 in FY2022, #5 in FY2023, #5 in FY2024 and #4 in FY2025; up 3 since Jul 2024–Jun 2025.
2	Metropolitan Security Services, Inc. Top agencies AOUSC (Administrative Office of the U.S. Courts) DOJ (Department of Justice) GSA (General Services Administration)	$531,119,601	6.6%	Rank history: #5 in FY2021, #5 in FY2022, #4 in FY2023, #1 in FY2024 and #2 in FY2025; down 1 since Jul 2024–Jun 2025.
3	Amentum Holdings, Inc. Through Amentum Services, Inc. Top agencies DHS (Department of Homeland Security) Army (Department of the Army) USAF (Department of the Air Force)	$509,554,233	6.3%	Rank history: not on the FY2021–FY2024 lists and #95 in FY2025; up 78 since Jul 2024–Jun 2025.
4	Securitas Electronic Security Inc. Through Paragon Systems Inc. Top agencies DHS (Department of Homeland Security) HHS (Department of Health and Human Services) DOJ (Department of Justice)	$407,664,539	5.1%	Rank history: not on the FY2021–FY2023 lists, #3 in FY2024 and #1 in FY2025; down 2 since Jul 2024–Jun 2025.
5	Corecivic, Inc. Top agencies DHS (Department of Homeland Security) DOJ (Department of Justice)	$335,807,592	4.2%	Rank history: #11 in FY2021, #7 in FY2022, #9 in FY2023, #9 in FY2024 and #5 in FY2025; up 2 since Jul 2024–Jun 2025.
6	CACI International Inc. Through Caci, Inc. - Federal Top agencies DCSA (Defense Counterintelligence and Security Agency) DHS (Department of Homeland Security)	$307,545,747	3.8%	Rank history: #3 in FY2021, #12 in FY2022, #8 in FY2023, #7 in FY2024 and #7 in FY2025; unchanged since Jul 2024–Jun 2025.
7	Triple Canopy Inc. Top agencies DHS (Department of Homeland Security) DOS (Department of State) Army (Department of the Army)	$301,990,325	3.7%	Rank history: #2 in FY2021, #1 in FY2022, #2 in FY2023, #6 in FY2024 and #3 in FY2025; down 4 since Jul 2024–Jun 2025.
8	Peraton Risk Decision Inc. Top agencies DCSA (Defense Counterintelligence and Security Agency) DHS (Department of Homeland Security)	$276,248,330	3.4%	Rank history: not on the FY2021–FY2023 lists, #14 in FY2024 and #6 in FY2025; down 3 since Jul 2024–Jun 2025.
9	Inter-CON Security Systems Inc. Top agencies DOS (Department of State) DOJ (Department of Justice) GAO (Government Accountability Office)	$233,027,191	2.9%	Rank history: #7 in FY2021, #9 in FY2022, #11 in FY2023, #11 in FY2024 and #8 in FY2025; up 2 since Jul 2024–Jun 2025.
10	Akima Infrastructure Protection LLC Top agencies DHS (Department of Homeland Security)	$224,135,531	2.8%	Rank history: not on the FY2021–FY2022 lists, #37 in FY2023, #28 in FY2024 and #11 in FY2025; up 7 since Jul 2024–Jun 2025.
11	Covenant Aviation Security, LLC Top agencies DHS (Department of Homeland Security) VA (Department of Veterans Affairs)	$221,637,098	2.8%	Rank history: #15 in FY2021, #13 in FY2022, #12 in FY2023, #12 in FY2024 and #12 in FY2025; up 27 since Jul 2024–Jun 2025.
12	Universal Protection Service, Limited Partnership Top agencies DHS (Department of Homeland Security) Smithsonian (Smithsonian Institution) DOS (Department of State)	$212,502,032	2.6%	Rank history: not on the FY2021–FY2023 lists, #30 in FY2024 and #17 in FY2025; up 3 since Jul 2024–Jun 2025.
13	BC Partners LLP Through Gardaworld Federal Services LLC Top agencies DOS (Department of State) Army (Department of the Army) Navy (Department of the Navy)	$140,943,717	1.7%	Rank history: not on the FY2021 list, #45 in FY2022, #15 in FY2023, #10 in FY2024 and #9 in FY2025; down 5 since Jul 2024–Jun 2025.
14	Kerberos International Inc. Top agencies DHS (Department of Homeland Security) DOI (Department of the Interior)	$131,585,581	1.6%	Rank history: not on the FY2021–FY2022 lists, #23 in FY2023, #16 in FY2024 and #15 in FY2025; unchanged since Jul 2024–Jun 2025.
15	Chenega Global Protection, LLC Top agencies NASA (National Aeronautics and Space Administration) HHS (Department of Health and Human Services) Army (Department of the Army)	$128,717,935	1.6%	Rank history: not on the FY2021–FY2023 lists, #17 in FY2024 and #13 in FY2025; down 3 since Jul 2024–Jun 2025.
16	Paragon Professional Services LLC Top agencies DHS (Department of Homeland Security) DOS (Department of State)	$119,002,697	1.5%	Rank history: not on the FY2021 list, #98 in FY2022, #19 in FY2023, #20 in FY2024 and #18 in FY2025; unchanged since Jul 2024–Jun 2025.
17	Pond Security Service GMBH Top agencies Army (Department of the Army) DOS (Department of State) DECA (Defense Commissary Agency)	$117,328,021	1.5%	Rank history: #13 in FY2021, #11 in FY2022, #13 in FY2023, #15 in FY2024 and #14 in FY2025; down 4 since Jul 2024–Jun 2025.
18	Centerra Group, LLC Top agencies AOUSC (Administrative Office of the U.S. Courts) DOE (Department of Energy) Commerce (Department of Commerce)	$110,611,851	1.4%	Rank history: #31 in FY2021, not on the FY2022–FY2023 lists, #13 in FY2024 and #16 in FY2025; down 8 since Jul 2024–Jun 2025.
19	G4S Secure Solutions (USA) Inc. Top agencies DHS (Department of Homeland Security)	$102,867,149	1.3%	Rank history: not on the FY2021–FY2023 lists, #31 in FY2024 and #20 in FY2025; up 8 since Jul 2024–Jun 2025.
20	Bradley Technologies Inc. Top agencies DHS (Department of Homeland Security) CSOSA (Court Services and Offender Supervision Agency) Army (Department of the Army)	$86,113,419	1.1%	Rank history: #93 in FY2021, #84 in FY2022, #33 in FY2023, #23 in FY2024 and #19 in FY2025; unchanged since Jul 2024–Jun 2025.
21	Mvm, Inc. Top agencies DHS (Department of Homeland Security)	$85,124,399	1.1%	Rank history: #12 in FY2021, #3 in FY2022, #6 in FY2023, #8 in FY2024 and #10 in FY2025; down 12 since Jul 2024–Jun 2025.
22	Vendtech-Sgi LLC Top agencies DHS (Department of Homeland Security)	$82,353,426	1.0%	Rank history: #18 in FY2021, #19 in FY2022, #21 in FY2023, #21 in FY2024 and #22 in FY2025; down 1 since Jul 2024–Jun 2025.
23	American Eagle Protective Services Corp Top agencies DHS (Department of Homeland Security) DOJ (Department of Justice)	$72,848,305	0.9%	Rank history: not on the FY2021–FY2023 lists, #79 in FY2024 and #65 in FY2025; up 73 since Jul 2024–Jun 2025.
24	CDA Incorporated Top agencies DHS (Department of Homeland Security)	$71,781,545	0.9%	Rank history: #25 in FY2021, #28 in FY2022, #38 in FY2023, #24 in FY2024 and #21 in FY2025; down 5 since Jul 2024–Jun 2025.
25	VMD Systems Integrators Inc Top agencies DHS (Department of Homeland Security)	$71,525,432	0.9%	Rank history: not on the FY2021–FY2022 lists, #35 in FY2023, #38 in FY2024 and #34 in FY2025; up 17 since Jul 2024–Jun 2025.
26	Nana Regional Corporation, Inc. 2 awardees, including Akima Global Services, LLC and Akima Centerra Integrated Services LLC Top agencies DHS (Department of Homeland Security) AOUSC (Administrative Office of the U.S. Courts)	$67,953,030	0.8%	Rank history: #14 in FY2021, #14 in FY2022, #16 in FY2023, #26 in FY2024 and #23 in FY2025; up 58 since Jul 2024–Jun 2025.
27	Simmons & Golden Security LLC Top agencies DHS (Department of Homeland Security) DOE (Department of Energy)	$58,933,860	0.7%	Rank history: not on the FY2021–FY2023 lists, #62 in FY2024 and #26 in FY2025; up 1 since Jul 2024–Jun 2025.
28	Chenega Naswik International LLC Top agencies MDA (DOD Missile Defense Agency) DHS (Department of Homeland Security) Army (Department of the Army)	$55,152,588	0.7%	Rank history: not on the FY2021–FY2023 lists, #46 in FY2024 and #37 in FY2025; up 19 since Jul 2024–Jun 2025.
29	Golden Svcs, LLC Top agencies DHS (Department of Homeland Security) DOE (Department of Energy)	$46,696,317	0.6%	Rank history: #17 in FY2021, #15 in FY2022, #29 in FY2023, #40 in FY2024 and #36 in FY2025; up 1 since Jul 2024–Jun 2025.
30	Arctic Slope Regional Corporation 2 awardees, including Asrc Federal Administrative Services, LLC and Asrc Federal Professional Services, LLC Top agencies DCSA (Defense Counterintelligence and Security Agency)	$44,987,596	0.6%	Rank history: not on the FY2021–FY2022 lists, #41 in FY2023, #22 in FY2024 and #51 in FY2025; down 8 since Jul 2024–Jun 2025.
31	Diversified Protection Corp Top agencies DHS (Department of Homeland Security) DOL (Department of Labor) NARA (National Archives and Records Administration)	$43,159,559	0.5%	Rank history: #19 in FY2021, #18 in FY2022, #22 in FY2023, #34 in FY2024 and #27 in FY2025; down 7 since Jul 2024–Jun 2025.
32	The Whitestone Group, Inc. Top agencies HHS (Department of Health and Human Services) DOI (Department of the Interior) DHS (Department of Homeland Security)	$43,010,716	0.5%	Rank history: not on the FY2021 list, #51 in FY2022, #60 in FY2023, #52 in FY2024 and #31 in FY2025; down 1 since Jul 2024–Jun 2025.
33	Nve, Inc. Top agencies DOS (Department of State)	$40,646,633	0.5%	Rank history: #42 in FY2021, #27 in FY2022, #36 in FY2023, not on the FY2024 list and #25 in FY2025; up 11 since Jul 2024–Jun 2025.
34	Continuity Global Solutions LLC Top agencies DOS (Department of State) Army (Department of the Army) DHS (Department of Homeland Security)	$40,364,751	0.5%	Rank history: #55 in FY2021, #52 in FY2022, #43 in FY2023, #58 in FY2024 and #39 in FY2025; up 12 since Jul 2024–Jun 2025.
35	Kr-Mtac LLC Top agencies DHS (Department of Homeland Security)	$39,881,686	0.5%	Rank history: not on the FY2021–FY2022 lists, #54 in FY2023, #37 in FY2024 and #33 in FY2025; down 3 since Jul 2024–Jun 2025.
36	Acuity - Janus Global, LLC Top agencies DOS (Department of State)	$38,702,838	0.5%	Rank history: not on the FY2021–FY2023 lists, #47 in FY2024 and #40 in FY2025; up 3 since Jul 2024–Jun 2025.
37	Aviation Security Management LLC Top agencies DHS (Department of Homeland Security)	$36,776,783	0.5%	Rank history: #37 in FY2021, #29 in FY2022, #30 in FY2023, #54 in FY2024 and #50 in FY2025; up 13 since Jul 2024–Jun 2025.
38	Trailboss Enterprises, Inc. Top agencies DHS (Department of Homeland Security)	$36,749,409	0.5%	Rank history: #88 in FY2021, not on the FY2022–FY2023 lists, #36 in FY2024 and #29 in FY2025; down 13 since Jul 2024–Jun 2025.
39	Management & Training Corporation Top agencies DHS (Department of Homeland Security)	$36,686,917	0.5%	Rank history: #32 in FY2021, #31 in FY2022, #28 in FY2023, #32 in FY2024 and #28 in FY2025; down 10 since Jul 2024–Jun 2025.
40	Shields Point LLC Top agencies DOT (Department of Transportation) DHS (Department of Homeland Security) DOJ (Department of Justice)	$35,374,592	0.4%	Rank history: not on the FY2021–FY2024 lists and #82 in FY2025; up 37 since Jul 2024–Jun 2025.
41	Vision Quest Solutions Inc. Top agencies USDA (Department of Agriculture) DOE (Department of Energy) Commerce (Department of Commerce)	$32,676,570	0.4%	Rank history: not on the FY2021–FY2024 lists and #46 in FY2025; up 19 since Jul 2024–Jun 2025.
42	Pütz Security AG Top agencies DOS (Department of State)	$31,714,599	0.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
43	G4S Secure Integration LLC Top agencies DOS (Department of State)	$29,981,589	0.4%	Rank history: not on the FY2021–FY2022 lists, #77 in FY2023, #25 in FY2024 and #30 in FY2025; down 20 since Jul 2024–Jun 2025.
44	SOC LLC Top agencies DOS (Department of State) Navy (Department of the Navy)	$28,954,285	0.4%	Rank history: not on the FY2021–FY2023 lists, #56 in FY2024 and not on the FY2025 list; up 31 since Jul 2024–Jun 2025.
45	Spectrum Security Services, Inc. Top agencies DHS (Department of Homeland Security)	$28,896,924	0.4%	Rank history: #50 in FY2021, #47 in FY2022, #49 in FY2023, #60 in FY2024 and #49 in FY2025; up 9 since Jul 2024–Jun 2025.
46	S1S Alpha LLC Top agencies DOD (Department of Defense)	$28,864,407	0.4%	Rank history: not on the FY2021 list, #59 in FY2022, #27 in FY2023, #43 in FY2024 and #53 in FY2025; down 3 since Jul 2024–Jun 2025.
47	Hana Industries, Inc. Top agencies DHS (Department of Homeland Security) Navy (Department of the Navy) DOT (Department of Transportation)	$28,428,839	0.4%	Rank history: #33 in FY2021, #34 in FY2022, #34 in FY2023, #41 in FY2024 and #32 in FY2025; down 10 since Jul 2024–Jun 2025.
48	Bering Straits Professional Services, LLC Top agencies DOT (Department of Transportation) HHS (Department of Health and Human Services) Army (Department of the Army)	$28,412,095	0.4%	Rank history: not on the FY2021–FY2023 lists, #67 in FY2024 and #35 in FY2025; down 12 since Jul 2024–Jun 2025.
49	Professional Risk Management, Inc. Top agencies DOJ (Department of Justice)	$27,922,360	0.3%	Rank history: #72 in FY2021, #67 in FY2022, #56 in FY2023, #42 in FY2024 and #42 in FY2025; down 9 since Jul 2024–Jun 2025.
50	Madison Associates Inc. Top agencies DOJ (Department of Justice) HHS (Department of Health and Human Services) DOS (Department of State)	$26,745,319	0.3%	Rank history: #71 in FY2021, #64 in FY2022, #55 in FY2023, #55 in FY2024 and #38 in FY2025; up 8 since Jul 2024–Jun 2025.
51	Johnson Security Bureau, Inc. Top agencies DHS (Department of Homeland Security) VA (Department of Veterans Affairs)	$26,195,728	0.3%	Rank history: not on the FY2021–FY2023 lists, #96 in FY2024 and #70 in FY2025; up 113 since Jul 2024–Jun 2025.
52	SERVEXO Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice) Navy (Department of the Navy)	$25,805,817	0.3%	Rank history: not on the FY2021–FY2024 lists and #60 in FY2025; up 31 since Jul 2024–Jun 2025.
53	Iworks Corp Top agencies DCSA (Defense Counterintelligence and Security Agency)	$24,993,244	0.3%	Rank history: #54 in FY2021, #62 in FY2022, not on the FY2023–FY2024 lists and #59 in FY2025; up 19 since Jul 2024–Jun 2025.
54	Constellis, LLC Through Omniplex World Services Corporation Top agencies DHS (Department of Homeland Security)	$23,469,200	0.3%	Rank history: not on the FY2021–FY2023 lists, #90 in FY2024 and #89 in FY2025; up 43 since Jul 2024–Jun 2025.
55	Hana Technologies & Systems, Inc. Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security) HHS (Department of Health and Human Services)	$22,923,270	0.3%	Rank history: not on the FY2021–FY2024 lists and #88 in FY2025; up 30 since Jul 2024–Jun 2025.
56	The Chenega Corporation 4 awardees, including Chenega Global Protection, LLC and Chenega Naswik International LLC Top agencies HHS (Department of Health and Human Services) NASA (National Aeronautics and Space Administration) DHS (Department of Homeland Security)	$22,172,574	0.3%	Rank history: #36 in FY2021, #26 in FY2022, #14 in FY2023, #39 in FY2024 and not on the FY2025 list; new, not ranked in Jul 2024–Jun 2025.
57	Defense Consulting Services LLC Top agencies DHS (Department of Homeland Security) DISA (Defense Information Systems Agency) DHA (Defense Health Agency)	$21,959,732	0.3%	Rank history: not on the FY2021 list, #88 in FY2022, #66 in FY2023, #82 in FY2024 and #79 in FY2025; up 102 since Jul 2024–Jun 2025.
58	Pinnacle Protection Partners, LLC Top agencies DHS (Department of Homeland Security)	$20,842,926	0.3%	Rank history: not on the FY2021–FY2024 lists and #54 in FY2025; up 1 since Jul 2024–Jun 2025.
59	Equifax Workforce Solutions LLC Top agencies SSA (Social Security Administration) DCSA (Defense Counterintelligence and Security Agency) DOS (Department of State)	$20,570,467	0.3%	Rank history: not on the FY2021–FY2023 lists, #49 in FY2024 and #52 in FY2025; up 228 since Jul 2024–Jun 2025.
60	Protection Strategies Inc. Top agencies HHS (Department of Health and Human Services) DOE (Department of Energy) DHS (Department of Homeland Security)	$20,521,412	0.3%	Rank history: #38 in FY2021, #21 in FY2022, #31 in FY2023, #45 in FY2024 and #45 in FY2025; down 27 since Jul 2024–Jun 2025.
61	Ahtna Professional Services, Inc. Top agencies DHS (Department of Homeland Security)	$20,521,354	0.3%	Rank history: not on the FY2021 list, #75 in FY2022, #89 in FY2023, #78 in FY2024 and #63 in FY2025; down 8 since Jul 2024–Jun 2025.
62	G4S France JV Top agencies DOS (Department of State)	$19,663,353	0.2%	Rank history: not on the FY2021–FY2024 lists and #43 in FY2025; down 5 since Jul 2024–Jun 2025.
63	Joeun System Corp. Top agencies Army (Department of the Army) DOS (Department of State)	$19,526,164	0.2%	Rank history: not on the FY2021 list, #56 in FY2022, #52 in FY2023, #65 in FY2024 and #57 in FY2025; up 10 since Jul 2024–Jun 2025.
64	North American Security, Incorporated Top agencies DHS (Department of Homeland Security)	$18,284,826	0.2%	Rank history: #28 in FY2021, #32 in FY2022, #32 in FY2023, #35 in FY2024 and #41 in FY2025; down 23 since Jul 2024–Jun 2025.
65	I3 Pathfinder USA LLC Top agencies DOS (Department of State)	$17,943,247	0.2%	Rank history: #59 in FY2021, #60 in FY2022, #63 in FY2023, #69 in FY2024 and #61 in FY2025; down 14 since Jul 2024–Jun 2025.
66	Alante Security Group, Inc. Top agencies DHS (Department of Homeland Security)	$17,037,111	0.2%	Rank history: #58 in FY2021, #94 in FY2022, #61 in FY2023, #68 in FY2024 and #68 in FY2025; unchanged since Jul 2024–Jun 2025.
67	The Cogar Group. Ltd. Top agencies VA (Department of Veterans Affairs) Commerce (Department of Commerce) OPM (Office of Personnel Management)	$16,984,538	0.2%	Rank history: #66 in FY2021, #63 in FY2022, #58 in FY2023, #77 in FY2024 and #64 in FY2025; unchanged since Jul 2024–Jun 2025.
68	Meritus Solutions Group LLC Top agencies Navy (Department of the Navy) Army (Department of the Army)	$16,777,371	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
69	ISS Action Inc. Top agencies DHS (Department of Homeland Security)	$16,760,306	0.2%	Rank history: #26 in FY2021, #22 in FY2022, #20 in FY2023, #27 in FY2024 and #44 in FY2025; down 34 since Jul 2024–Jun 2025.
70	United Security Inc. Top agencies DOJ (Department of Justice)	$16,216,835	0.2%	Rank history: #53 in FY2021, #66 in FY2022, #48 in FY2023, #57 in FY2024 and #58 in FY2025; up 6 since Jul 2024–Jun 2025.
71	Ids International, LLC 2 awardees, including Ids International Government Services LLC Top agencies DOS (Department of State) NARA (National Archives and Records Administration) Army (Department of the Army)	$15,488,328	0.2%	Rank history: #48 in FY2021, not on the FY2022–FY2023 lists, #51 in FY2024 and #48 in FY2025; down 37 since Jul 2024–Jun 2025.
72	HBC Management Services, Inc. Top agencies SSA (Social Security Administration)	$15,076,325	0.2%	Rank history: not on the FY2021–FY2024 lists and #67 in FY2025; new, not ranked in Jul 2024–Jun 2025.
73	Koniag Professional Services, LLC Top agencies DARPA (Defense Advanced Research Projects Agency)	$14,894,703	0.2%	Rank history: not on the FY2021–FY2023 lists, #86 in FY2024 and #78 in FY2025; up 14 since Jul 2024–Jun 2025.
74	American Security Programs Inc. Top agencies NARA (National Archives and Records Administration)	$14,746,441	0.2%	Rank history: not on the FY2021–FY2024 lists and #69 in FY2025; up 5 since Jul 2024–Jun 2025.
75	Trust Consulting Services Inc. Top agencies HHS (Department of Health and Human Services) DOT (Department of Transportation) EPA (Environmental Protection Agency)	$14,626,566	0.2%	Rank history: not on the FY2021–FY2025 lists; up 95 since Jul 2024–Jun 2025.
76	Culpepper & Associates Security Services Inc. Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force) NARA (National Archives and Records Administration)	$14,038,013	0.2%	Rank history: #39 in FY2021, #46 in FY2022, #51 in FY2023, #63 in FY2024 and #56 in FY2025; down 28 since Jul 2024–Jun 2025.
77	Chenega Security International, LLC Top agencies Army (Department of the Army)	$13,799,592	0.2%	Rank history: #67 in FY2021, #55 in FY2022, #71 in FY2023, #73 in FY2024 and #80 in FY2025; up 3 since Jul 2024–Jun 2025.
78	Surveillance Security, Inc. Top agencies VA (Department of Veterans Affairs) Commerce (Department of Commerce)	$12,659,281	0.2%	Rank history: #77 in FY2021, #74 in FY2022, #67 in FY2023, #59 in FY2024 and #75 in FY2025; down 9 since Jul 2024–Jun 2025.
79	G4S India JV Top agencies DOS (Department of State)	$12,503,933	0.2%	Rank history: not on the FY2021–FY2023 lists, #71 in FY2024 and #62 in FY2025; down 15 since Jul 2024–Jun 2025.
80	TCS Alpha Security LLC Top agencies DHS (Department of Homeland Security) Navy (Department of the Navy)	$12,383,774	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
81	GXC Max Inc. Top agencies DHS (Department of Homeland Security)	$12,231,579	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
82	Securemedy Inc. Top agencies National Gallery of Art Army (Department of the Army) HHS (Department of Health and Human Services)	$12,040,393	0.1%	Rank history: not on the FY2021–FY2024 lists and #81 in FY2025; up 11 since Jul 2024–Jun 2025.
83	Caduceus Healthcare Inc Through Caduceus Inc. Top agencies DHS (Department of Homeland Security)	$11,970,000	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
84	VXL Enterprises LLC Top agencies DOS (Department of State)	$11,600,937	0.1%	Rank history: #74 in FY2021, #49 in FY2022, #62 in FY2023, #85 in FY2024 and #85 in FY2025; up 2 since Jul 2024–Jun 2025.
85	Gardaworld-Transguard Group UAE 2 awardees, including Gardaworld Federal Nigeria Top agencies DOS (Department of State)	$11,332,347	0.1%	Rank history: not on the FY2021–FY2025 lists; up 14 since Jul 2024–Jun 2025.
86	Bering Global Solutions, LLC Top agencies Navy (Department of the Navy)	$10,916,502	0.1%	Rank history: not on the FY2021–FY2025 lists; up 58 since Jul 2024–Jun 2025.
87	First Coast Security Solutions Inc. Top agencies DHS (Department of Homeland Security)	$10,846,528	0.1%	Rank history: not on the FY2021–FY2024 lists and #99 in FY2025; up 31 since Jul 2024–Jun 2025.
88	Prudential Protective Services LLC Top agencies DOJ (Department of Justice) Commerce (Department of Commerce)	$10,782,723	0.1%	Rank history: not on the FY2021–FY2023 lists, #84 in FY2024 and #84 in FY2025; down 6 since Jul 2024–Jun 2025.
89	Five Stones Intelligence Inc. Top agencies DOJ (Department of Justice)	$10,769,672	0.1%	Rank history: not on the FY2021–FY2024 lists and #96 in FY2025; down 1 since Jul 2024–Jun 2025.
90	Singularity Security Group LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DHS (Department of Homeland Security)	$10,708,942	0.1%	Rank history: not on the FY2021 list, #68 in FY2022, #69 in FY2023, #70 in FY2024 and #71 in FY2025; down 16 since Jul 2024–Jun 2025.
91	GXC Inc Top agencies DHS (Department of Homeland Security) USAF (Department of the Air Force)	$10,704,065	0.1%	Rank history: not on the FY2021–FY2025 lists; up 34 since Jul 2024–Jun 2025.
92	Olgoonik Innovations, LLC Top agencies DOS (Department of State)	$10,588,542	0.1%	Rank history: not on the FY2021–FY2024 lists and #55 in FY2025; down 37 since Jul 2024–Jun 2025.
93	Civis Holding SPA Through C.i.v.i.s. Centro Italiano DI Vigilanza Interna E Stradale S.P.A. Top agencies Army (Department of the Army)	$10,547,195	0.1%	Rank history: not on the FY2021–FY2024 lists and #98 in FY2025; up 9 since Jul 2024–Jun 2025.
94	NV Securitas Securitas Critical Infrastructure Services Soc. Top agencies DOS (Department of State)	$10,489,402	0.1%	Rank history: #83 in FY2021, #95 in FY2022, #99 in FY2023 and not on the FY2024–FY2025 lists; up 28 since Jul 2024–Jun 2025.
95	KR Contracting Inc. Top agencies DHS (Department of Homeland Security) OSD (Office of the Secretary of Defense) Treasury (Department of the Treasury)	$10,375,689	0.1%	Rank history: #34 in FY2021, #35 in FY2022, #47 in FY2023, #66 in FY2024 and #90 in FY2025; down 34 since Jul 2024–Jun 2025.
96	Coventbridge (USA) LLC Top agencies USDA (Department of Agriculture)	$10,307,013	0.1%	Rank history: not on the FY2021–FY2023 lists, #95 in FY2024 and #93 in FY2025; new, not ranked in Jul 2024–Jun 2025.
97	Patronus Systems Inc Top agencies DHS (Department of Homeland Security)	$10,218,066	0.1%	Rank history: not on the FY2021–FY2022 lists, #53 in FY2023, #44 in FY2024 and #47 in FY2025; down 52 since Jul 2024–Jun 2025.
98	Starside Security & Investigation Inc. Top agencies DHS (Department of Homeland Security) DOJ (Department of Justice)	$9,876,962	0.1%	Rank history: not on the FY2021–FY2025 lists; up 52 since Jul 2024–Jun 2025.
99	Excalibur Associates Inc. 2 awardees Top agencies Commerce (Department of Commerce) USDA (Department of Agriculture)	$9,482,010	0.1%	Rank history: #49 in FY2021, #44 in FY2022, #40 in FY2023, #53 in FY2024 and #74 in FY2025; down 31 since Jul 2024–Jun 2025.
100	G4S Denmark JV Top agencies DOS (Department of State)	$9,093,647	0.1%	Rank history: not on the FY2021–FY2025 lists; up 10 since Jul 2024–Jun 2025.

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100 of 823 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 56161

Code	Net obligations	Largest contractor
561612 Security Guards and Patrol Services	$6,761,382,964	The GEO Group, Inc.
561611 Investigation and Personal Background Check Services	$991,992,710	CACI International Inc.
561613 Armored Car Services	$4,485,057	Loomis Armored US 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 $8.06 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.
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 NAICS 56161 contractors in Jul 2025–Jun 2026?

1. The GEO Group, Inc. ($535M), 2. Metropolitan Security Services, Inc. ($531M), 3. Amentum Holdings, Inc. ($510M), 4. Securitas Electronic Security Inc. ($408M), 5. Corecivic, Inc. ($336M), 6. CACI International Inc. ($308M), 7. Triple Canopy Inc. ($302M), 8. Peraton Risk Decision Inc. ($276M), 9. Inter-CON Security Systems Inc. ($233M), 10. Akima Infrastructure Protection LLC ($224M).

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