Top 100 Contractors in NAICS 561611: Investigation and Personal Background Check Services, FY2025

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

The top 10 won 79% of FY2025 NAICS 561611 contract dollars

Ranking facts

Contract obligations
$857,527,048 Net of deobligations, by contracts coded NAICS 561611
Contractors
258 Parent companies with an obligation
Largest contractor
Peraton Risk Decision Inc. $293 million, 31.9% 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 $293,181,902
Rank history: not on the FY2021–FY2023 lists and #2 in FY2024; up 1 since FY2024.
2 $259,084,876
Rank history: #1 in FY2021, #2 in FY2022, #2 in FY2023 and #1 in FY2024; down 1 since FY2024.
3 $34,575,871
Rank history: #12 in FY2021, #9 in FY2022, #7 in FY2023 and #8 in FY2024; up 5 since FY2024.
4 $28,148,039
Rank history: #13 in FY2021, #10 in FY2022, #8 in FY2023 and #5 in FY2024; up 1 since FY2024.
5 $21,104,030
Rank history: not on the FY2021–FY2022 lists, #5 in FY2023 and #4 in FY2024; down 1 since FY2024.
6 $20,132,696
Rank history: #14 in FY2021, #15 in FY2022, #10 in FY2023 and #86 in FY2024; up 80 since FY2024.
7 $19,208,641
Rank history: #5 in FY2021, #4 in FY2022, #3 in FY2023 and #6 in FY2024; down 1 since FY2024.
8 $18,783,430
Rank history: not on the FY2021–FY2024 lists; new.
9 $16,879,210
Rank history: #9 in FY2021, #8 in FY2022, #9 in FY2023 and #9 in FY2024; unchanged since FY2024.
10 $11,288,528
Rank history: not on the FY2021–FY2023 lists and #10 in FY2024; unchanged since FY2024.
11 $10,717,845
Rank history: #22 in FY2021, #17 in FY2022, #18 in FY2023 and #24 in FY2024; up 13 since FY2024.
12 $10,307,013
Rank history: not on the FY2021–FY2023 lists and #12 in FY2024; unchanged since FY2024.
13
Five Stones Intelligence Inc.
$9,926,985
Rank history: #16 in FY2021, #12 in FY2022, #11 in FY2023 and #11 in FY2024; down 2 since FY2024.
14 $8,509,781
Rank history: #11 in FY2021, #7 in FY2022, #12 in FY2023 and #19 in FY2024; up 5 since FY2024.
15 $7,236,532
Rank history: #15 in FY2021, #27 in FY2022, #22 in FY2023 and #20 in FY2024; up 5 since FY2024.
16 $7,108,459
Rank history: #27 in FY2021, #26 in FY2022, #20 in FY2023 and #14 in FY2024; down 2 since FY2024.
17 $7,088,559
Rank history: not on the FY2021–FY2024 lists; new.
18 $6,850,560
Rank history: not on the FY2021–FY2024 lists; new.
19 $6,122,841
Rank history: #45 in FY2021, #55 in FY2022, #49 in FY2023 and #38 in FY2024; up 19 since FY2024.
20
Blocktrace LLC
$5,593,821
Rank history: not on the FY2021–FY2023 lists and #18 in FY2024; down 2 since FY2024.
21 $5,341,132
Rank history: #28 in FY2021, #20 in FY2022, #15 in FY2023 and #22 in FY2024; up 1 since FY2024.
22 $5,157,134
Rank history: not on the FY2021–FY2024 lists; new.
23
Nemean Solutions LLC
$4,002,855
Rank history: not on the FY2021–FY2022 lists, #30 in FY2023 and #17 in FY2024; down 6 since FY2024.
24 $2,855,302
Rank history: #42 in FY2021, #38 in FY2022, #28 in FY2023 and #34 in FY2024; up 10 since FY2024.
25 $2,463,344
Rank history: not on the FY2021–FY2022 lists, #29 in FY2023 and #25 in FY2024; unchanged since FY2024.
26 $2,369,015
Rank history: #38 in FY2021, #32 in FY2022, #34 in FY2023 and #26 in FY2024; unchanged since FY2024.
27 $2,208,971
Rank history: not on the FY2021–FY2024 lists; new.
28 $2,200,149
Rank history: #29 in FY2021, #29 in FY2022, #31 in FY2023 and #27 in FY2024; down 1 since FY2024.
29 $1,820,923
Rank history: #39 in FY2021, #57 in FY2022, #45 in FY2023 and #36 in FY2024; up 7 since FY2024.
30 $1,726,647
Rank history: not on the FY2021–FY2024 lists; new.
31 $1,649,376
Rank history: #46 in FY2021, #52 in FY2022, #51 in FY2023 and #41 in FY2024; up 10 since FY2024.
32 $1,587,083
Rank history: not on the FY2021–FY2022 lists, #47 in FY2023 and #35 in FY2024; up 3 since FY2024.
33 $1,517,827
Rank history: not on the FY2021–FY2024 lists; new.
34 $1,403,864
Rank history: #58 in FY2021, #61 in FY2022, #59 in FY2023 and #65 in FY2024; up 31 since FY2024.
35 $1,278,044
Rank history: #40 in FY2021, #47 in FY2022, #46 in FY2023 and #39 in FY2024; up 4 since FY2024.
36 $1,161,434
Rank history: not on the FY2021–FY2024 lists; new.
37 $1,091,757
Rank history: #48 in FY2021, #31 in FY2022, #25 in FY2023 and #28 in FY2024; down 9 since FY2024.
38 $1,061,572
Rank history: #17 in FY2021, #18 in FY2022, #16 in FY2023 and #21 in FY2024; down 17 since FY2024.
39 $999,889
Rank history: not on the FY2021 list, #42 in FY2022, #36 in FY2023 and not on the FY2024 list; returned.
40 $891,082
Rank history: not on the FY2021–FY2024 lists; new.
41 $867,017
Rank history: not on the FY2021–FY2024 lists; up 90 since FY2024.
42 $852,446
Rank history: not on the FY2021–FY2023 lists and #45 in FY2024; up 3 since FY2024.
43 $834,018
Rank history: #41 in FY2021, #45 in FY2022, #40 in FY2023 and #50 in FY2024; up 7 since FY2024.
44 $750,000
Rank history: #25 in FY2021, #25 in FY2022, #24 in FY2023 and not on the FY2024 list; returned.
45
County of ST Louis Through ST. Louis County, Missouri
$687,812
Rank history: #55 in FY2021, #48 in FY2022, #48 in FY2023 and #48 in FY2024; up 3 since FY2024.
46 $675,000
Rank history: not on the FY2021–FY2022 lists, #53 in FY2023 and #42 in FY2024; down 4 since FY2024.
47 $651,787
Rank history: not on the FY2021 list, #84 in FY2022, #63 in FY2023 and #46 in FY2024; down 1 since FY2024.
48
HR Anew, Inc.
$642,215
Rank history: not on the FY2021–FY2022 lists, #62 in FY2023 and #40 in FY2024; down 8 since FY2024.
49 $607,273
Rank history: #64 in FY2021, #63 in FY2022, #41 in FY2023 and #53 in FY2024; up 4 since FY2024.
50 $564,912
Rank history: not on the FY2021–FY2022 lists, #39 in FY2023 and #31 in FY2024; down 19 since FY2024.
51 $559,593
Rank history: not on the FY2021–FY2024 lists; up 195 since FY2024.
52 $525,500
Rank history: not on the FY2021–FY2022 lists, #56 in FY2023 and #52 in FY2024; unchanged since FY2024.
53
Chainalysis Government Solutions, LLC
$418,381
Rank history: not on the FY2021–FY2023 lists and #29 in FY2024; down 24 since FY2024.
54 $383,506
Rank history: not on the FY2021–FY2024 lists; new.
55 $317,192
Rank history: #56 in FY2021, #60 in FY2022, #83 in FY2023 and #62 in FY2024; up 7 since FY2024.
56 $305,615
Rank history: not on the FY2021–FY2023 lists and #64 in FY2024; up 8 since FY2024.
57 $291,720
Rank history: not on the FY2021–FY2023 lists and #72 in FY2024; up 15 since FY2024.
58 $245,896
Rank history: not on the FY2021 list, #53 in FY2022, #73 in FY2023 and #49 in FY2024; down 9 since FY2024.
59 $224,376
Rank history: #77 in FY2021, #67 in FY2022, #44 in FY2023 and #56 in FY2024; down 3 since FY2024.
60
ManTech International Corporation Through Mantech Advanced Systems International, Inc.
$207,717
Rank history: not on the FY2021–FY2024 lists; new.
61 $197,802
Rank history: #47 in FY2021, #68 in FY2022, #75 in FY2023 and #66 in FY2024; up 5 since FY2024.
62 $189,723
Rank history: not on the FY2021–FY2024 lists; new.
63 $169,205
Rank history: #49 in FY2021, #59 in FY2022, #54 in FY2023 and #61 in FY2024; down 2 since FY2024.
64 $135,786
Rank history: #87 in FY2021, #89 in FY2022, #79 in FY2023 and #71 in FY2024; up 7 since FY2024.
65 $134,057
Rank history: #98 in FY2021, #78 in FY2022, #90 in FY2023 and #68 in FY2024; up 3 since FY2024.
66 $128,100
Rank history: #96 in FY2021, #77 in FY2022, #84 in FY2023 and #74 in FY2024; up 8 since FY2024.
67 $128,100
Rank history: not on the FY2021 list, #94 in FY2022, #92 in FY2023 and #67 in FY2024; unchanged since FY2024.
68 $125,538
Rank history: #97 in FY2021, #98 in FY2022, #93 in FY2023 and #69 in FY2024; up 1 since FY2024.
69 $125,245
Rank history: not on the FY2021–FY2022 lists, #76 in FY2023 and #73 in FY2024; up 4 since FY2024.
70 $122,000
Rank history: not on the FY2021–FY2024 lists; new.
71 $122,000
Rank history: #91 in FY2021, #91 in FY2022, #80 in FY2023 and not on the FY2024 list; up 171 since FY2024.
72 $120,926
Rank history: #94 in FY2021, #97 in FY2022, #89 in FY2023 and #77 in FY2024; up 5 since FY2024.
73 $120,216
Rank history: not on the FY2021–FY2023 lists and #88 in FY2024; up 15 since FY2024.
74 $119,565
Rank history: not on the FY2021–FY2024 lists; up 109 since FY2024.
75 $115,258
Rank history: not on the FY2021 list, #87 in FY2022, not on the FY2023 list and #76 in FY2024; up 1 since FY2024.
76 $101,792
Rank history: not on the FY2021–FY2024 lists; new.
77 $100,208
Rank history: not on the FY2021 list, #83 in FY2022, #94 in FY2023 and #47 in FY2024; down 30 since FY2024.
78 $100,187
Rank history: not on the FY2021–FY2022 lists, #87 in FY2023 and #79 in FY2024; up 1 since FY2024.
79 $90,033
Rank history: not on the FY2021–FY2023 lists and #87 in FY2024; up 8 since FY2024.
80 $86,130
Rank history: not on the FY2021–FY2022 lists, #86 in FY2023 and #80 in FY2024; unchanged since FY2024.
81 $83,455
Rank history: not on the FY2021–FY2023 lists and #90 in FY2024; up 9 since FY2024.
82 $83,422
Rank history: not on the FY2021–FY2022 lists, #78 in FY2023 and #82 in FY2024; unchanged since FY2024.
83 $82,885
Rank history: not on the FY2021–FY2024 lists; new.
84 $74,900
Rank history: #65 in FY2021, #79 in FY2022 and not on the FY2023–FY2024 lists; up 19 since FY2024.
85 $73,389
Rank history: not on the FY2021–FY2024 lists; new.
86 $69,578
Rank history: not on the FY2021–FY2023 lists and #59 in FY2024; down 27 since FY2024.
87 $55,931
Rank history: not on the FY2021–FY2024 lists; up 121 since FY2024.
88 $54,728
Rank history: not on the FY2021–FY2024 lists; up 61 since FY2024.
89 $53,294
Rank history: not on the FY2021–FY2024 lists; up 20 since FY2024.
90 $52,949
Rank history: not on the FY2021–FY2024 lists; new.
91 $47,060
Rank history: not on the FY2021–FY2023 lists and #92 in FY2024; up 1 since FY2024.
92 $43,500
Rank history: not on the FY2021–FY2024 lists; up 15 since FY2024.
93 $42,705
Rank history: not on the FY2021–FY2024 lists; up 17 since FY2024.
94 $40,321
Rank history: not on the FY2021–FY2024 lists; new.
95 $36,372
Rank history: not on the FY2021–FY2024 lists; up 20 since FY2024.
96 $36,201
Rank history: not on the FY2021–FY2023 lists and #75 in FY2024; down 21 since FY2024.
97 $36,000
Rank history: not on the FY2021–FY2024 lists; new.
98 $32,862
Rank history: not on the FY2021–FY2024 lists; up 89 since FY2024.
99 $30,430
Rank history: not on the FY2021–FY2024 lists; up 20 since FY2024.
100 $29,540
Rank history: not on the FY2021–FY2024 lists; up 39 since FY2024.
Show 75 more

100 of 258 contractors listed here. See the rest on GovTribe.

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 $918 million 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 NAICS 561611 contractors in FY2025?

1. Peraton Risk Decision Inc. ($293M), 2. CACI International Inc. ($259M), 3. Madison Associates Inc. ($34.6M), 4. Professional Risk Management, Inc. ($28.1M), 5. Arctic Slope Regional Corporation ($21.1M), 6. Equifax Inc. ($20.1M), 7. Protection Strategies Inc. ($19.2M), 8. Olgoonik Corporation ($18.8M), 9. Iworks Corp ($16.9M), 10. Constellis, LLC ($11.3M).

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