Top 100 Contractors in NAICS 56: Administrative and Support and Waste Management and Remediation Services, FY2025

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

The top 10 won 45% of FY2025 NAICS 56 contract dollars

Ranking facts

Contract obligations
$68,482,857,232 Net of deobligations, by contracts coded NAICS 56 or a code under it
Contractors
10,279 Parent companies with an obligation
Largest contractor
Honeywell International Inc. $7.8 billion, 10.7% 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 $7,796,908,979
Rank history: #1 in FY2021, #1 in FY2022, #1 in FY2023 and #1 in FY2024; unchanged since FY2024.
2 $5,087,344,498
Rank history: #2 in FY2021, #2 in FY2022, #2 in FY2023 and #2 in FY2024; unchanged since FY2024.
3 $3,552,976,905
Rank history: not on the FY2021–FY2023 lists and #27 in FY2024; up 24 since FY2024.
4 $2,778,427,029
Rank history: #9 in FY2021, #9 in FY2022, #16 in FY2023 and #4 in FY2024; unchanged since FY2024.
5 $2,679,775,141
Rank history: #6 in FY2021, #6 in FY2022, #5 in FY2023 and #5 in FY2024; unchanged since FY2024.
6 $2,537,032,429
Rank history: #4 in FY2021, #4 in FY2022, #3 in FY2023 and #3 in FY2024; down 3 since FY2024.
7 $2,332,235,313
Rank history: not on the FY2021–FY2023 lists and #7 in FY2024; unchanged since FY2024.
8 $2,167,963,012
Rank history: not on the FY2021–FY2023 lists and #20 in FY2024; up 12 since FY2024.
9 $1,921,935,329
Rank history: not on the FY2021–FY2024 lists; up 426 since FY2024.
10 $1,830,121,525
Rank history: not on the FY2021–FY2024 lists; new.
11 $1,149,492,459
Rank history: not on the FY2021–FY2023 lists and #8 in FY2024; down 3 since FY2024.
12 $1,107,146,305
Rank history: not on the FY2021–FY2023 lists and #14 in FY2024; up 2 since FY2024.
13 $1,062,510,600
Rank history: not on the FY2021 list, #17 in FY2022, #13 in FY2023 and #11 in FY2024; down 2 since FY2024.
14 $994,553,799
Rank history: #12 in FY2021, #10 in FY2022, #11 in FY2023 and #9 in FY2024; down 5 since FY2024.
15 $852,172,357
Rank history: #16 in FY2021, #13 in FY2022, #14 in FY2023 and #12 in FY2024; down 3 since FY2024.
16 $804,652,167
Rank history: #13 in FY2021, #12 in FY2022, #17 in FY2023 and #13 in FY2024; down 3 since FY2024.
17 $796,035,008
Rank history: not on the FY2021–FY2024 lists; new.
18 $718,910,624
Rank history: #25 in FY2021, #27 in FY2022, #26 in FY2023 and #33 in FY2024; up 15 since FY2024.
19 $656,365,226
Rank history: not on the FY2021–FY2022 lists, #51 in FY2023 and #31 in FY2024; up 12 since FY2024.
20 $603,372,648
Rank history: not on the FY2021–FY2024 lists; up 318 since FY2024.
21 $599,900,424
Rank history: not on the FY2021–FY2023 lists and #36 in FY2024; up 15 since FY2024.
22 $597,671,118
Rank history: not on the FY2021–FY2023 lists and #10 in FY2024; down 12 since FY2024.
23 $541,154,315
Rank history: not on the FY2021–FY2024 lists; up 372 since FY2024.
24 $528,576,869
Rank history: not on the FY2021–FY2023 lists and #76 in FY2024; up 52 since FY2024.
25 $527,525,607
Rank history: #36 in FY2021, #28 in FY2022, #32 in FY2023 and #21 in FY2024; down 4 since FY2024.
26 $456,126,074
Rank history: #46 in FY2021, #35 in FY2022, #31 in FY2023 and not on the FY2024 list; up 84 since FY2024.
27 $402,769,179
Rank history: #27 in FY2021, #25 in FY2022, #29 in FY2023 and #32 in FY2024; up 5 since FY2024.
28 $390,263,043
Rank history: #22 in FY2021, #23 in FY2022, #27 in FY2023 and #28 in FY2024; unchanged since FY2024.
29 $389,260,351
Rank history: #30 in FY2021, #19 in FY2022, #10 in FY2023 and #17 in FY2024; down 12 since FY2024.
30 $315,397,445
Rank history: #32 in FY2021, #29 in FY2022, #43 in FY2023 and #50 in FY2024; up 20 since FY2024.
31 $298,823,424
Rank history: #24 in FY2021, #41 in FY2022, #33 in FY2023 and #39 in FY2024; up 8 since FY2024.
32 $293,181,902
Rank history: not on the FY2021–FY2023 lists and #62 in FY2024; up 30 since FY2024.
33 $289,456,116
Rank history: not on the FY2021–FY2023 lists and #30 in FY2024; down 3 since FY2024.
34 $260,707,500
Rank history: #77 in FY2021, #83 in FY2022, #61 in FY2023 and #42 in FY2024; up 8 since FY2024.
35 $238,840,818
Rank history: not on the FY2021–FY2024 lists; new.
36 $237,663,874
Rank history: #17 in FY2021, #14 in FY2022, #12 in FY2023 and #19 in FY2024; down 17 since FY2024.
37 $220,781,102
Rank history: #65 in FY2021, #64 in FY2022, #68 in FY2023 and #73 in FY2024; up 36 since FY2024.
38 $211,410,602
Rank history: #43 in FY2021, #36 in FY2022, #41 in FY2023 and #47 in FY2024; up 9 since FY2024.
39 $206,477,198
Rank history: #92 in FY2021, #60 in FY2022, #74 in FY2023 and #25 in FY2024; down 14 since FY2024.
40 $195,412,662
Rank history: not on the FY2021–FY2022 lists, #76 in FY2023 and #58 in FY2024; up 18 since FY2024.
41 $189,833,031
Rank history: #53 in FY2021, #48 in FY2022, #50 in FY2023 and #55 in FY2024; up 14 since FY2024.
42 $185,572,257
Rank history: not on the FY2021–FY2022 lists, #65 in FY2023 and #51 in FY2024; up 9 since FY2024.
43 $184,911,611
Rank history: not on the FY2021–FY2023 lists and #61 in FY2024; up 18 since FY2024.
44 $184,085,997
Rank history: not on the FY2021–FY2023 lists and #60 in FY2024; up 16 since FY2024.
45 $172,732,300
Rank history: #52 in FY2021, #26 in FY2022, #37 in FY2023 and #44 in FY2024; down 1 since FY2024.
46 $171,724,677
Rank history: #29 in FY2021, #37 in FY2022, #64 in FY2023 and not on the FY2024 list; up 117 since FY2024.
47 $169,862,897
Rank history: not on the FY2021–FY2024 lists; up 207 since FY2024.
48 $169,307,091
Rank history: not on the FY2021–FY2024 lists; new.
49 $168,306,448
Rank history: not on the FY2021–FY2023 lists and #54 in FY2024; up 5 since FY2024.
50 $168,114,821
Rank history: not on the FY2021–FY2024 lists; new.
51 $160,871,753
Rank history: #66 in FY2021, #56 in FY2022, #62 in FY2023 and #63 in FY2024; up 12 since FY2024.
52 $138,791,951
Rank history: #31 in FY2021, #50 in FY2022, #30 in FY2023 and #37 in FY2024; down 15 since FY2024.
53 $136,735,233
Rank history: #44 in FY2021, #57 in FY2022, #45 in FY2023 and #52 in FY2024; down 1 since FY2024.
54 $132,359,640
Rank history: not on the FY2021–FY2022 lists, #19 in FY2023 and #18 in FY2024; down 36 since FY2024.
55 $129,847,904
Rank history: not on the FY2021–FY2024 lists; new.
56 $128,652,490
Rank history: #54 in FY2021, #51 in FY2022, #58 in FY2023 and #66 in FY2024; up 10 since FY2024.
57 $126,435,519
Rank history: #34 in FY2021, #34 in FY2022, #38 in FY2023 and #45 in FY2024; down 12 since FY2024.
58 $125,781,766
Rank history: not on the FY2021–FY2024 lists; new.
59 $125,568,331
Rank history: not on the FY2021–FY2024 lists; up 79 since FY2024.
60 $124,118,479
Rank history: not on the FY2021 list, #85 in FY2022 and not on the FY2023–FY2024 lists; returned.
61 $122,000,938
Rank history: not on the FY2021–FY2023 lists and #71 in FY2024; up 10 since FY2024.
62 $120,981,697
Rank history: not on the FY2021–FY2023 lists and #87 in FY2024; up 25 since FY2024.
63
EA Engineering Science and Technology Inc. PBC
$118,595,769
Rank history: not on the FY2021–FY2023 lists and #46 in FY2024; down 17 since FY2024.
64 $115,739,993
Rank history: #69 in FY2021, #49 in FY2022, #67 in FY2023 and not on the FY2024 list; up 40 since FY2024.
65 $113,983,984
Rank history: #78 in FY2021, #55 in FY2022, #47 in FY2023 and #72 in FY2024; up 7 since FY2024.
66 $111,625,246
Rank history: not on the FY2021–FY2024 lists; new.
67 $110,020,720
Rank history: not on the FY2021 list, #74 in FY2022, #77 in FY2023 and #67 in FY2024; unchanged since FY2024.
68 $108,318,335
Rank history: #3 in FY2021, #3 in FY2022, #90 in FY2023 and not on the FY2024 list; up 45 since FY2024.
69 $105,514,050
Rank history: not on the FY2021–FY2024 lists; up 239 since FY2024.
70 $105,461,716
Rank history: not on the FY2021 list, #71 in FY2022, #86 in FY2023 and #92 in FY2024; up 22 since FY2024.
71 $104,669,504
Rank history: not on the FY2021–FY2023 lists and #78 in FY2024; up 7 since FY2024.
72 $101,351,626
Rank history: #26 in FY2021, not on the FY2022–FY2023 lists and #79 in FY2024; up 7 since FY2024.
73 $98,390,769
Rank history: not on the FY2021–FY2023 lists and #74 in FY2024; up 1 since FY2024.
74 $91,620,401
Rank history: #95 in FY2021, #78 in FY2022, #53 in FY2023 and #57 in FY2024; down 17 since FY2024.
75 $89,516,529
Rank history: not on the FY2021–FY2024 lists; up 34 since FY2024.
76 $89,344,003
Rank history: not on the FY2021–FY2024 lists; up 69 since FY2024.
77 $89,124,916
Rank history: not on the FY2021–FY2024 lists; up 46 since FY2024.
78 $86,714,314
Rank history: not on the FY2021–FY2023 lists and #68 in FY2024; down 10 since FY2024.
79 $86,406,397
Rank history: #70 in FY2021, #66 in FY2022, #87 in FY2023 and #86 in FY2024; up 7 since FY2024.
80 $85,414,346
Rank history: not on the FY2021–FY2022 lists, #92 in FY2023 and #95 in FY2024; up 15 since FY2024.
81 $84,603,000
Rank history: not on the FY2021–FY2023 lists and #81 in FY2024; unchanged since FY2024.
82 $82,324,610
Rank history: not on the FY2021–FY2023 lists and #49 in FY2024; down 33 since FY2024.
83
AED Stratecon LLC
$81,685,728
Rank history: not on the FY2021–FY2024 lists; new.
84 $79,246,148
Rank history: not on the FY2021–FY2024 lists; up 19 since FY2024.
85 $77,319,103
Rank history: not on the FY2021 list, #92 in FY2022 and not on the FY2023–FY2024 lists; up 59 since FY2024.
86 $77,256,082
Rank history: #85 in FY2021, #94 in FY2022, #88 in FY2023 and #97 in FY2024; up 11 since FY2024.
87 $76,792,548
Rank history: not on the FY2021–FY2023 lists and #99 in FY2024; up 12 since FY2024.
88 $76,048,253
Rank history: not on the FY2021–FY2024 lists; up 62 since FY2024.
89 $75,110,000
Rank history: #72 in FY2021, #63 in FY2022, #73 in FY2023 and not on the FY2024 list; up 52 since FY2024.
90 $73,458,811
Rank history: not on the FY2021–FY2024 lists; up 332 since FY2024.
91 $73,086,226
Rank history: not on the FY2021–FY2022 lists, #98 in FY2023 and not on the FY2024 list; up 162 since FY2024.
92 $72,706,565
Rank history: not on the FY2021–FY2022 lists, #99 in FY2023 and not on the FY2024 list; up 27 since FY2024.
93 $72,050,596
Rank history: not on the FY2021–FY2024 lists; new.
94 $71,577,757
Rank history: not on the FY2021–FY2024 lists; up 152 since FY2024.
95 $71,478,742
Rank history: not on the FY2021–FY2024 lists; up 93 since FY2024.
96 $71,320,802
Rank history: not on the FY2021–FY2024 lists; up 231 since FY2024.
97 $71,078,627
Rank history: not on the FY2021 list, #70 in FY2022, #85 in FY2023 and not on the FY2024 list; up 8 since FY2024.
98 $71,038,357
Rank history: #81 in FY2021, #68 in FY2022, #93 in FY2023 and #98 in FY2024; unchanged since FY2024.
99
Tiya Services L.L.C.
$70,551,971
Rank history: not on the FY2021–FY2024 lists; up 3 since FY2024.
100 $69,658,268
Rank history: #63 in FY2021, not on the FY2022 list, #89 in FY2023 and not on the FY2024 list; up 6 since FY2024.
Show 75 more

100 of 10,279 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 56

Code Net obligations Largest contractor
561 Administrative and Support Services $55,186,393,525 Honeywell International Inc.
562 Waste Management and Remediation Services $13,296,463,706 Environmental Chemical Corporation

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 $73.2 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.
  • 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 56 contractors in FY2025?

1. Honeywell International Inc. ($7.8B), 2. Triad National Security LLC ($5.09B), 3. Amentum Holdings, Inc. ($3.55B), 4. Fluor Corporation ($2.78B), 5. Ut-Battelle LLC ($2.68B), 6. Consolidated Nuclear Security, LLC ($2.54B), 7. V2X, Inc. ($2.33B), 8. Environmental Chemical Corporation ($2.17B), 9. Pantexas Deterrence, LLC ($1.92B), 10. Ashbritt Inc. ($1.83B).

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