Top 100 Contractors in PSC F0: Natural Resource Conservation Services, FY2025

Name: Top 100 Contractors in PSC F0: Natural Resource Conservation Services, FY2025
Creator: GovTribe

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

The top 10 won 20% of FY2025 PSC F0 contract dollars

Contract obligations: $2,562,936,726 Net of deobligations, by contracts coded PSC F0 or a code under it
Contractors: 3,292 Parent companies with an obligation
Largest contractor: Helicopter Transport Services, LLC $114 million, 4.3% 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	Helicopter Transport Services, LLC Top agencies USDA (Department of Agriculture)	$114,084,233	4.3%	Rank history: not on the FY2021 list, #1 in FY2022, #10 in FY2023 and #14 in FY2024; up 13 since FY2024.
2	Helicopter Express LLC Top agencies USDA (Department of Agriculture)	$102,458,350	3.8%	Rank history: #46 in FY2021, #6 in FY2022, #12 in FY2023 and #2 in FY2024; unchanged since FY2024.
3	10 Tanker Air Carrier LLC Top agencies USDA (Department of Agriculture)	$49,394,503	1.8%	Rank history: not on the FY2021–FY2023 lists and #4 in FY2024; up 1 since FY2024.
4	Siller Helicopters, LLC Top agencies USDA (Department of Agriculture)	$43,190,696	1.6%	Rank history: not on the FY2021 list, #8 in FY2022, #8 in FY2023 and #15 in FY2024; up 11 since FY2024.
5	Rotak LLC Top agencies USDA (Department of Agriculture)	$41,002,546	1.5%	Rank history: not on the FY2021 list, #63 in FY2022, #18 in FY2023 and #13 in FY2024; up 8 since FY2024.
6	Aero Air, LLC Top agencies USDA (Department of Agriculture)	$38,532,225	1.4%	Rank history: #41 in FY2021, not on the FY2022 list, #28 in FY2023 and #6 in FY2024; unchanged since FY2024.
7	Coulson Aviation (Usa), Inc. Top agencies USDA (Department of Agriculture)	$38,370,087	1.4%	Rank history: not on the FY2021 list, #17 in FY2022, #20 in FY2023 and #5 in FY2024; down 2 since FY2024.
8	Billings Flying Service LLC Top agencies USDA (Department of Agriculture)	$36,964,084	1.4%	Rank history: not on the FY2021 list, #4 in FY2022, #5 in FY2023 and #11 in FY2024; up 3 since FY2024.
9	Neptune Aviation Services, Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$36,522,009	1.4%	Rank history: #14 in FY2021, #11 in FY2022, #17 in FY2023 and #8 in FY2024; down 1 since FY2024.
10	Precision, LLC Top agencies USDA (Department of Agriculture)	$33,174,832	1.2%	Rank history: not on the FY2021 list, #37 in FY2022, #80 in FY2023 and #12 in FY2024; up 2 since FY2024.
11	Tenax Aerospace LLC Top agencies USDA (Department of Agriculture)	$30,427,466	1.1%	Rank history: #99 in FY2021 and not on the FY2022–FY2024 lists; returned.
12	Croman Corp Top agencies USDA (Department of Agriculture)	$29,716,728	1.1%	Rank history: not on the FY2021–FY2023 lists and #10 in FY2024; down 2 since FY2024.
13	Aero-Flite, Inc. Top agencies USDA (Department of Agriculture)	$29,441,669	1.1%	Rank history: #26 in FY2021, not on the FY2022 list, #32 in FY2023 and #9 in FY2024; down 4 since FY2024.
14	Capitol Helicopters, Inc. Top agencies USDA (Department of Agriculture)	$27,501,058	1.0%	Rank history: not on the FY2021 list, #48 in FY2022, #45 in FY2023 and #26 in FY2024; up 12 since FY2024.
15	Grayback Forestry Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$27,090,955	1.0%	Rank history: not on the FY2021–FY2023 lists and #18 in FY2024; up 3 since FY2024.
16	Patrick Environmental Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$25,820,354	1.0%	Rank history: not on the FY2021 list, #31 in FY2022, #22 in FY2023 and #17 in FY2024; up 1 since FY2024.
17	Helimax Aviation LLC Top agencies USDA (Department of Agriculture)	$23,870,850	0.9%	Rank history: not on the FY2021–FY2023 lists and #16 in FY2024; down 1 since FY2024.
18	CPM Development Corporation Top agencies USDA (Department of Agriculture)	$23,338,728	0.9%	Rank history: not on the FY2021–FY2024 lists; new.
19	Firestorm Wildland Fire Suppression, Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$20,292,146	0.8%	Rank history: not on the FY2021 list, #16 in FY2022, #24 in FY2023 and #20 in FY2024; up 1 since FY2024.
20	Bighorn Airways Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$18,303,185	0.7%	Rank history: not on the FY2021 list, #53 in FY2022, #78 in FY2023 and #56 in FY2024; up 36 since FY2024.
21	Co Fire Aviation, Inc. Top agencies DOI (Department of the Interior)	$17,914,940	0.7%	Rank history: not on the FY2021–FY2023 lists and #38 in FY2024; up 17 since FY2024.
22	Western Pilot Service Inc. Top agencies DOI (Department of the Interior) USDA (Department of Agriculture)	$16,815,205	0.6%	Rank history: not on the FY2021–FY2023 lists and #24 in FY2024; up 2 since FY2024.
23	Brink Brothers Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$16,249,676	0.6%	Rank history: not on the FY2021–FY2022 lists, #29 in FY2023 and #7 in FY2024; down 16 since FY2024.
24	Pacific OASIS Inc Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$15,184,682	0.6%	Rank history: not on the FY2021–FY2022 lists, #34 in FY2023 and #21 in FY2024; down 3 since FY2024.
25	Miller Timber Services, Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$14,783,778	0.6%	Rank history: #47 in FY2021, #23 in FY2022, #48 in FY2023 and #50 in FY2024; up 25 since FY2024.
26	Heli-1 Corp Top agencies USDA (Department of Agriculture)	$14,322,679	0.5%	Rank history: not on the FY2021–FY2023 lists and #33 in FY2024; up 7 since FY2024.
27	Big Sky Mobile Catering Corp Top agencies USDA (Department of Agriculture)	$14,311,301	0.5%	Rank history: #8 in FY2021, #38 in FY2022, #54 in FY2023 and #42 in FY2024; up 15 since FY2024.
28	Thunder MTN Catering Inc. Top agencies USDA (Department of Agriculture)	$14,015,902	0.5%	Rank history: #15 in FY2021, #18 in FY2022, #69 in FY2023 and #47 in FY2024; up 19 since FY2024.
29	Spur Aviation Services, LC Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$13,579,746	0.5%	Rank history: not on the FY2021 list, #55 in FY2022, #64 in FY2023 and #23 in FY2024; down 6 since FY2024.
30	Alpine Services LLC Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$13,342,698	0.5%	Rank history: not on the FY2021–FY2022 lists, #90 in FY2023 and #66 in FY2024; up 36 since FY2024.
31	Houston's Too LC Top agencies USDA (Department of Agriculture)	$13,301,878	0.5%	Rank history: #7 in FY2021, #70 in FY2022, #70 in FY2023 and #59 in FY2024; up 28 since FY2024.
32	Air Resources Helicopters, Inc. Top agencies USDA (Department of Agriculture)	$12,790,076	0.5%	Rank history: not on the FY2021–FY2023 lists and #44 in FY2024; up 12 since FY2024.
33	Henrys Aerial Service Inc. Top agencies DOI (Department of the Interior)	$12,497,065	0.5%	Rank history: not on the FY2021–FY2023 lists and #75 in FY2024; up 42 since FY2024.
34	Dynamic Aviation Group, Inc. Top agencies USDA (Department of Agriculture)	$12,385,552	0.5%	Rank history: #35 in FY2021, #34 in FY2022, #67 in FY2023 and #67 in FY2024; up 33 since FY2024.
35	West Coast Reforestation Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$12,373,391	0.5%	Rank history: not on the FY2021 list, #83 in FY2022, not on the FY2023 list and #54 in FY2024; up 19 since FY2024.
36	Bluesky Helicopters Inc. Top agencies USDA (Department of Agriculture)	$12,055,118	0.4%	Rank history: not on the FY2021 list, #39 in FY2022, #39 in FY2023 and #43 in FY2024; up 7 since FY2024.
37	C.c. Calzone, LLC Top agencies USDA (Department of Agriculture)	$11,889,490	0.4%	Rank history: not on the FY2021–FY2023 lists and #63 in FY2024; up 26 since FY2024.
38	Hillsboro Aviation Inc. Top agencies USDA (Department of Agriculture)	$11,836,805	0.4%	Rank history: not on the FY2021–FY2023 lists and #39 in FY2024; up 1 since FY2024.
39	A.i.s., Inc. Top agencies Commerce (Department of Commerce)	$11,587,266	0.4%	Rank history: #30 in FY2021, #47 in FY2022, #71 in FY2023 and #29 in FY2024; down 10 since FY2024.
40	Imperial Forestry, Incorporated Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$11,286,306	0.4%	Rank history: #17 in FY2021, #20 in FY2022, #15 in FY2023 and #25 in FY2024; down 15 since FY2024.
41	New Frontier Aviation, LLC Top agencies DOI (Department of the Interior)	$11,275,002	0.4%	Rank history: not on the FY2021–FY2023 lists and #48 in FY2024; up 7 since FY2024.
42	Kit Helicopter Operations LLC Top agencies USDA (Department of Agriculture)	$11,200,140	0.4%	Rank history: not on the FY2021–FY2022 lists, #98 in FY2023 and #88 in FY2024; up 46 since FY2024.
43	Columbia Basin Helicopter, Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$11,177,275	0.4%	Rank history: not on the FY2021 list, #87 in FY2022, #85 in FY2023 and not on the FY2024 list; up 65 since FY2024.
44	Orbic Air, LLC Top agencies USDA (Department of Agriculture)	$11,098,981	0.4%	Rank history: not on the FY2021–FY2023 lists and #51 in FY2024; up 7 since FY2024.
45	Aero Spray Inc. Top agencies DOI (Department of the Interior)	$11,071,149	0.4%	Rank history: #10 in FY2021, not on the FY2022–FY2023 lists and #34 in FY2024; down 11 since FY2024.
46	Blue Mountain Fire Suppression Incorporated Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$10,936,481	0.4%	Rank history: not on the FY2021–FY2024 lists; new.
47	Trans Aero LLC Top agencies USDA (Department of Agriculture)	$10,894,887	0.4%	Rank history: not on the FY2021 list, #59 in FY2022, #59 in FY2023 and #35 in FY2024; down 12 since FY2024.
48	Fletcher Flying Service Inc Top agencies DOI (Department of the Interior)	$10,724,578	0.4%	Rank history: not on the FY2021–FY2024 lists; up 57 since FY2024.
49	Alta Pacific Fire Fighting, LLC Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$10,667,658	0.4%	Rank history: not on the FY2021–FY2022 lists, #93 in FY2023 and #57 in FY2024; up 8 since FY2024.
50	P.j. Helicopters, Inc. Top agencies USDA (Department of Agriculture)	$10,652,173	0.4%	Rank history: not on the FY2021–FY2023 lists and #22 in FY2024; down 28 since FY2024.
51	North Pacific Forestry Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$10,506,081	0.4%	Rank history: not on the FY2021–FY2022 lists, #58 in FY2023 and #28 in FY2024; down 23 since FY2024.
52	Timberline Helicopters Inc. Top agencies USDA (Department of Agriculture)	$10,391,441	0.4%	Rank history: not on the FY2021 list, #40 in FY2022, #68 in FY2023 and #41 in FY2024; down 11 since FY2024.
53	State of Oregon Department of Fish and Wildlife Top agencies Army (Department of the Army)	$10,302,312	0.4%	Rank history: not on the FY2021–FY2023 lists and #45 in FY2024; down 8 since FY2024.
54	Ponderosa Aviation Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$10,283,366	0.4%	Rank history: not on the FY2021 list, #42 in FY2022, #46 in FY2023 and #27 in FY2024; down 27 since FY2024.
55	Heliqwest International Inc. Top agencies USDA (Department of Agriculture)	$10,238,419	0.4%	Rank history: #69 in FY2021, #25 in FY2022, not on the FY2023 list and #55 in FY2024; unchanged since FY2024.
56	Central Copters, Inc. Top agencies USDA (Department of Agriculture)	$9,734,975	0.4%	Rank history: not on the FY2021 list, #57 in FY2022, #79 in FY2023 and #73 in FY2024; up 17 since FY2024.
57	Torres Contracting, Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$9,577,783	0.4%	Rank history: not on the FY2021 list, #81 in FY2022, not on the FY2023 list and #52 in FY2024; down 5 since FY2024.
58	Brainerd Helicopters, Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$9,497,147	0.4%	Rank history: not on the FY2021 list, #33 in FY2022, #43 in FY2023 and #40 in FY2024; down 18 since FY2024.
59	P.r. Reforestation, Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$9,403,443	0.4%	Rank history: not on the FY2021–FY2023 lists and #70 in FY2024; up 11 since FY2024.
60	Summitt Forests, Inc. Top agencies DOI (Department of the Interior) USDA (Department of Agriculture)	$8,900,651	0.3%	Rank history: #23 in FY2021, #15 in FY2022, #6 in FY2023 and #46 in FY2024; down 14 since FY2024.
61	Leisnoi Diversified Services, LLC Top agencies EPA (Environmental Protection Agency)	$8,342,628	0.3%	Rank history: #18 in FY2021, #24 in FY2022, #38 in FY2023 and #19 in FY2024; down 42 since FY2024.
62	R & R Contracting Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$7,963,462	0.3%	Rank history: not on the FY2021–FY2022 lists, #100 in FY2023 and #100 in FY2024; up 38 since FY2024.
63	Minuteman Aviation Inc. Top agencies USDA (Department of Agriculture)	$7,822,819	0.3%	Rank history: not on the FY2021 list, #50 in FY2022, #82 in FY2023 and #81 in FY2024; up 18 since FY2024.
64	Scofield Catering & Management Inc Top agencies USDA (Department of Agriculture)	$7,736,757	0.3%	Rank history: not on the FY2021–FY2024 lists; up 85 since FY2024.
65	RJT Contracting Inc. Top agencies USDA (Department of Agriculture)	$7,725,000	0.3%	Rank history: not on the FY2021–FY2024 lists; up 45 since FY2024.
66	Mountain Blade Runner LLC Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$7,337,096	0.3%	Rank history: not on the FY2021–FY2023 lists and #72 in FY2024; up 6 since FY2024.
67	Franco Reforestation Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$7,274,965	0.3%	Rank history: #44 in FY2021, #52 in FY2022, #41 in FY2023 and #90 in FY2024; up 23 since FY2024.
68	Bode Aviation, Inc. Top agencies USDA (Department of Agriculture)	$7,247,911	0.3%	Rank history: not on the FY2021–FY2023 lists and #91 in FY2024; up 23 since FY2024.
69	AFS Forestry LLC Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$7,185,351	0.3%	Rank history: not on the FY2021–FY2024 lists; up 97 since FY2024.
70	GFP Mobile Food Services, LLC Top agencies USDA (Department of Agriculture)	$7,162,079	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
71	Mountain West Helicopters, LLC Top agencies USDA (Department of Agriculture)	$6,710,441	0.3%	Rank history: not on the FY2021–FY2023 lists and #99 in FY2024; up 28 since FY2024.
72	Gold Aero Inc. Top agencies USDA (Department of Agriculture)	$6,633,643	0.2%	Rank history: not on the FY2021–FY2022 lists, #86 in FY2023 and not on the FY2024 list; up 41 since FY2024.
73	Courtney Aviation, LLC Top agencies USDA (Department of Agriculture)	$6,488,310	0.2%	Rank history: not on the FY2021–FY2024 lists; up 150 since FY2024.
74	Boedeker Flying Service, Inc. Top agencies DOI (Department of the Interior)	$6,327,654	0.2%	Rank history: not on the FY2021–FY2024 lists; up 79 since FY2024.
75	Forest Fitness LLC Top agencies USDA (Department of Agriculture)	$6,320,430	0.2%	Rank history: not on the FY2021–FY2023 lists and #71 in FY2024; down 4 since FY2024.
76	Pacific States Marine Fisheries Commission Top agencies Commerce (Department of Commerce) DOI (Department of the Interior)	$6,281,058	0.2%	Rank history: not on the FY2021 list, #71 in FY2022, not on the FY2023 list and #83 in FY2024; up 7 since FY2024.
77	Idaho Helicopters Inc. Top agencies USDA (Department of Agriculture)	$6,098,962	0.2%	Rank history: not on the FY2021 list, #78 in FY2022, #91 in FY2023 and #76 in FY2024; down 1 since FY2024.
78	Despain, Kerry, M Top agencies DOI (Department of the Interior)	$6,059,765	0.2%	Rank history: #74 in FY2021, not on the FY2022–FY2023 lists and #94 in FY2024; up 16 since FY2024.
79	Sprout Forestry Incorporated Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$6,014,525	0.2%	Rank history: not on the FY2021 list, #94 in FY2022, #73 in FY2023 and #87 in FY2024; up 8 since FY2024.
80	Marstel-Day, LLC Top agencies Navy (Department of the Navy)	$5,974,146	0.2%	Rank history: not on the FY2021–FY2024 lists; up 321 since FY2024.
81	Storm Services Engineering LLC Top agencies USDA (Department of Agriculture)	$5,956,350	0.2%	Rank history: not on the FY2021–FY2024 lists; up 35 since FY2024.
82	R & G Food Services Inc. Top agencies USDA (Department of Agriculture)	$5,922,698	0.2%	Rank history: #11 in FY2021, #29 in FY2022 and not on the FY2023–FY2024 lists; returned.
83	Mindwinder Limited Top agencies USDA (Department of Agriculture)	$5,842,933	0.2%	Rank history: not on the FY2021–FY2024 lists; up 43 since FY2024.
84	J. Franco Reforestation Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$5,808,850	0.2%	Rank history: not on the FY2021–FY2024 lists; up 55 since FY2024.
85	Neiman Timber Company, L.C. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$5,752,036	0.2%	Rank history: not on the FY2021–FY2024 lists; up 164 since FY2024.
86	J3 Contracting, Inc. Top agencies USDA (Department of Agriculture)	$5,749,888	0.2%	Rank history: #48 in FY2021, #62 in FY2022, not on the FY2023 list and #60 in FY2024; down 26 since FY2024.
87	Pacific Ridgeline Forestry LLC Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$5,596,659	0.2%	Rank history: not on the FY2021–FY2024 lists; up 41 since FY2024.
88	Anchor Point Fuels & Services, LLC Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$5,585,653	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
89	Evergreen Flying Service Inc. Top agencies DOI (Department of the Interior)	$5,406,620	0.2%	Rank history: not on the FY2021–FY2023 lists and #78 in FY2024; down 11 since FY2024.
90	Bishop Services Inc Top agencies USDA (Department of Agriculture)	$5,359,631	0.2%	Rank history: not on the FY2021–FY2023 lists and #93 in FY2024; up 3 since FY2024.
91	Diamond Road Maintenance, Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$5,291,626	0.2%	Rank history: not on the FY2021–FY2024 lists; up 18 since FY2024.
92	Aerial Timber Applicators Inc. Top agencies DOI (Department of the Interior)	$5,276,582	0.2%	Rank history: not on the FY2021–FY2023 lists and #69 in FY2024; down 23 since FY2024.
93	TJ Forestry Contracting LLC Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$5,150,343	0.2%	Rank history: not on the FY2021–FY2024 lists; up 114 since FY2024.
94	Delta Land Services LLC Top agencies Army (Department of the Army)	$5,147,700	0.2%	Rank history: #5 in FY2021, #28 in FY2022, #36 in FY2023 and not on the FY2024 list; returned.
95	JS Livestock Inc. Top agencies DOI (Department of the Interior)	$5,106,714	0.2%	Rank history: not on the FY2021–FY2023 lists and #74 in FY2024; down 21 since FY2024.
96	Willamette Valley Reforestation,Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$5,064,256	0.2%	Rank history: not on the FY2021–FY2024 lists; up 29 since FY2024.
97	J & Sons Contracting LLC Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$4,910,010	0.2%	Rank history: not on the FY2021–FY2024 lists; up 24 since FY2024.
98	D F Zee's Firefighting Catering, LLC Top agencies USDA (Department of Agriculture)	$4,877,785	0.2%	Rank history: #31 in FY2021, #61 in FY2022 and not on the FY2023–FY2024 lists; up 34 since FY2024.
99	Mother Lode Firecamp Services Inc. Top agencies USDA (Department of Agriculture)	$4,735,466	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
100	G B Aerial Applications Inc. Top agencies DOI (Department of the Interior)	$4,695,728	0.2%	Rank history: not on the FY2021–FY2024 lists; up 350 since FY2024.

Show 75 more

100 of 3,292 contractors listed here. See the rest on GovTribe.

Rankings for the codes under PSC F0

Code	Net obligations	Largest contractor
F003 Forest/Range Fire Suppression/Presuppression Services	$2,106,902,077	Helicopter Transport Services, LLC
F099 Other Natural Resources and Conservation Services	$156,170,332	CPM Development Corporation
F020 Fisheries Resources Management Services	$54,860,645	A.i.s., Inc.
F014 Tree Thinning Services	$45,706,542	Imperial Forestry, Incorporated
F016 Wildhorse/Burro Control Services	$43,814,754	Despain, Kerry, M
F018 Other Range/Forest Improvements Services (non-construction)	$32,581,869	Neiman Timber Company, L.C.
F006 Land Treatment Practices Services (plowing/clearing, etc.)	$24,044,095	West Coast Healthy Forest LLC
F005 Forest Tree Planting Services	$16,361,856	Mar-Len Environmental, Inc.
F001 Aerial Fertilization/Spraying Services	$14,255,050	Dynamic Aviation Group, Inc.
F021 Site Preparation	$13,830,702	Leisnoi Diversified Services, LLC
F019 Other Wildlife Management Services	$9,494,124	The Blackledge Group, Inc.
F009 Seed Collection/Production Services	$7,194,642	Benson Farms Inc.
F008 Recreation Site Maintenance Services (non-construction)	$2,861,706	LTC Forestry Inc

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 $2.68 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 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 PSC F0 contractors in FY2025?

1. Helicopter Transport Services, LLC ($114M), 2. Helicopter Express LLC ($102M), 3. 10 Tanker Air Carrier LLC ($49.4M), 4. Siller Helicopters, LLC ($43.2M), 5. Rotak LLC ($41M), 6. Aero Air, LLC ($38.5M), 7. Coulson Aviation (Usa), Inc. ($38.4M), 8. Billings Flying Service LLC ($37M), 9. Neptune Aviation Services, Inc. ($36.5M), 10. Precision, LLC ($33.2M).

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