Top 100 Contractors in NAICS 56161: Investigation, Guard, and Armored Car Services, Aug 2025–Jul 2026
Parent companies by net contract obligations Aug 1, 2025 – Jul 31, 2026 Code page on GovTribe
The latest 12 months. See the newest fiscal year's list: Top Contractors in NAICS 56161: Investigation, Guard, and Armored Car Services, FY2025.
The top 10 won 50% of NAICS 56161 contract dollars from August 2025 through July 2026
Ranking facts
- Contract obligations
- $7,944,004,143 Net of deobligations, by contracts coded NAICS 56161 or a code under it
- Contractors
- 804 Parent companies with an obligation
- Largest contractor
- The GEO Group, Inc. $667 million, 8.1% of obligations
- Data as of
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 | $667,048,450 | |||
| 2 | $523,653,985 | |||
| 3 | $510,127,180 | |||
| 4 | $433,467,246 | |||
| 5 |
Securitas Critical Infrastructure Services Inc.
|
$415,533,126 | ||
| 6 | $363,601,478 | |||
| 7 | $306,013,286 | |||
| 8 | $306,007,048 | |||
| 9 | $284,893,482 | |||
| 10 | $274,869,300 | |||
| 11 | $222,027,036 | |||
| 12 |
Inter-CON Security Systems Inc.
|
$218,963,095 | ||
| 13 | $156,041,007 | |||
| 14 | $149,171,099 | |||
| 15 |
BC Partners LLP
|
$148,568,098 | ||
| 16 | $140,777,110 | |||
| 17 |
Kerberos International Inc.
|
$138,477,454 | ||
| 18 |
Mvm, Inc.
Top agencies
|
$102,688,721 | ||
| 19 | $100,226,306 | |||
| 20 | $85,818,643 | |||
| 21 |
Vendtech-Sgi LLC
Top agencies
|
$82,163,813 | ||
| 22 | $76,021,725 | |||
| 23 |
CDA Incorporated
Top agencies
|
$73,053,690 | ||
| 24 |
American Eagle Protective Services Corp
|
$69,213,615 | ||
| 25 | $63,147,615 | |||
| 26 | $58,433,717 | |||
| 27 |
VMD Systems Integrators LLC
Top agencies
|
$54,383,728 | ||
| 28 | $49,229,967 | |||
| 29 |
Acuity International LLC
|
$45,377,574 | ||
| 30 | $44,987,596 | |||
| 31 | $42,843,088 | |||
| 32 | $42,693,753 | |||
| 33 | $42,680,791 | |||
| 34 |
Kr-Mtac LLC
Top agencies
|
$40,282,676 | ||
| 35 |
Nve, Inc.
Top agencies
|
$40,106,577 | ||
| 36 | $38,089,920 | |||
| 37 | $35,911,636 | |||
| 38 |
Pütz Security AG
Top agencies
|
$31,714,599 | ||
| 39 |
Aviation Security Management LLC
Top agencies
|
$31,651,356 | ||
| 40 | $31,469,256 | |||
| 41 |
G4S Secure Integration LLC
Top agencies
|
$31,363,567 | ||
| 42 | $29,542,283 | |||
| 43 | $28,969,695 | |||
| 44 | $27,922,360 | |||
| 45 |
SERVEXO
|
$27,883,874 | ||
| 46 |
ISS Action Inc.
Top agencies
|
$26,516,749 | ||
| 47 | $26,465,345 | |||
| 48 | $24,863,142 | |||
| 49 |
Ahtna, Incorporated
Top agencies
|
$24,421,444 | ||
| 50 | $23,750,484 | |||
| 51 | $23,047,599 | |||
| 52 | $22,323,166 | |||
| 53 | $20,509,216 | |||
| 54 | $19,888,692 | |||
| 55 |
G4S France JV
Top agencies
|
$19,663,353 | ||
| 56 | $18,058,857 | |||
| 57 | $17,581,908 | |||
| 58 | $16,999,855 | |||
| 59 | $16,473,958 | |||
| 60 | $16,253,327 | |||
| 61 | $15,664,453 | |||
| 62 | $15,357,040 | |||
| 63 | $15,091,119 | |||
| 64 | $15,035,638 | |||
| 65 | $14,429,095 | |||
| 66 | $14,241,710 | |||
| 67 | $13,417,542 | |||
| 68 |
GXC Max Inc.
Top agencies
|
$13,082,291 | ||
| 69 |
First Coast Security Solutions Inc.
Top agencies
|
$12,873,528 | ||
| 70 | $12,726,522 | |||
| 71 | $12,724,544 | |||
| 72 |
G4S India JV
Top agencies
|
$12,503,933 | ||
| 73 |
VXL Enterprises LLC
Top agencies
|
$12,406,573 | ||
| 74 | $12,178,774 | |||
| 75 | $12,040,393 | |||
| 76 |
Caduceus Healthcare Inc
Top agencies
|
$11,970,000 | ||
| 77 |
Civis Holding SPA
Top agencies
|
$11,885,891 | ||
| 78 | $11,821,440 | |||
| 79 | $11,638,899 | |||
| 80 |
Gardaworld-Transguard Group UAE
Top agencies
|
$11,632,365 | ||
| 81 | $11,181,793 | |||
| 82 |
GXC Inc
|
$11,039,047 | ||
| 83 |
Five Stones Intelligence Inc.
Top agencies
|
$10,769,672 | ||
| 84 | $10,492,817 | |||
| 85 | $9,866,171 | |||
| 86 | $9,774,402 | |||
| 87 |
G4S Guardsman JV
Top agencies
|
$9,445,982 | ||
| 88 |
Coventbridge (USA) LLC
Top agencies
|
$9,386,986 | ||
| 89 |
Compass United
Top agencies
|
$9,296,302 | ||
| 90 | $9,190,510 | |||
| 91 |
G4S Denmark JV
Top agencies
|
$9,093,647 | ||
| 92 |
Patronus Systems Inc
Top agencies
|
$9,027,518 | ||
| 93 | $8,686,250 | |||
| 94 |
United Security Inc.
Top agencies
|
$8,330,562 | ||
| 95 | $8,014,713 | |||
| 96 | $7,690,000 | |||
| 97 | $7,495,902 | |||
| 98 |
Starside Security & Investigation Inc.
|
$7,494,880 | ||
| 99 |
G4S Evik JV
Top agencies
|
$7,393,155 | ||
| 100 | $6,895,465 |
Show 75 more
100 of 804 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 | $6,950,096,401 | The GEO Group, Inc. |
| 561611 Investigation and Personal Background Check Services | $988,357,089 | CACI International Inc. |
| 561613 Armored Car Services | $5,550,653 | 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 $8.22 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.
- 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 Aug 2024–Jul 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 Aug 2025–Jul 2026?
1. The GEO Group, Inc. ($667M), 2. Metropolitan Security Services, Inc. ($524M), 3. Amentum Holdings, Inc. ($510M), 4. Constellis, LLC ($433M), 5. Securitas Critical Infrastructure Services Inc. ($416M), 6. Corecivic, Inc. ($364M), 7. CACI International Inc. ($306M), 8. Nana Regional Corporation, Inc. ($306M), 9. Universal Protection Service, Limited Partnership ($285M), 10. Peraton Risk Decision Inc. ($275M).
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