Top 100 Contractors in NAICS 2131: Support Activities for Mining, Jul 2025–Jun 2026

Name: Top 100 Contractors in NAICS 2131: Support Activities for Mining, 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 89% of NAICS 2131 contract dollars from July 2025 through June 2026

Contract obligations: $62,368,270 Net of deobligations, by contracts coded NAICS 2131 or a code under it
Contractors: 175 Parent companies with an obligation
Largest contractor: Promethean Operating I LLC $30.1 million, 47.1% 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	Promethean Operating I LLC Top agencies DOI (Department of the Interior)	$30,121,961	47.1%	Rank history: not on the FY2021–FY2023 lists, #3 in FY2024 and #1 in FY2025; up 4 since Jul 2024–Jun 2025.
2	Arctic Slope Regional Corporation Through Asrc Consulting & Environmental Services, LLC Top agencies DOI (Department of the Interior)	$9,505,301	14.9%	Rank history: #1 in FY2021, #4 in FY2022, not on the FY2023 list, #33 in FY2024 and #2 in FY2025; up 37 since Jul 2024–Jun 2025.
3	Olgoonik Oilfield Services LLC Top agencies DOI (Department of the Interior)	$7,568,546	11.8%	Rank history: not on the FY2021 list, #3 in FY2022, #7 in FY2023, #1 in FY2024 and #8 in FY2025; up 5 since Jul 2024–Jun 2025.
4	Olgoonik Construction Services LLC Top agencies DOI (Department of the Interior)	$2,457,448	3.8%	Rank history: not on the FY2021–FY2023 lists, #6 in FY2024 and #3 in FY2025; up 2 since Jul 2024–Jun 2025.
5	Chet Morrison Contractors LLC Top agencies DOI (Department of the Interior)	$2,088,114	3.3%	Rank history: not on the FY2021–FY2023 lists, #4 in FY2024 and #6 in FY2025; down 3 since Jul 2024–Jun 2025.
6	Jordan Modern Oil & Fuel Services Ltd. Co. Top agencies DOS (Department of State)	$1,924,218	3.0%	Rank history: not on the FY2021 list, #8 in FY2022, #3 in FY2023, #5 in FY2024 and #5 in FY2025; down 2 since Jul 2024–Jun 2025.
7	Brice Solutions, LLC Top agencies DOI (Department of the Interior)	$1,490,562	2.3%	Rank history: not on the FY2021–FY2022 lists, #35 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
8	E2 Contracting, Inc. Top agencies DOI (Department of the Interior)	$705,910	1.1%	Rank history: #14 in FY2021, #19 in FY2022, #55 in FY2023, #8 in FY2024 and #9 in FY2025; new, not ranked in Jul 2024–Jun 2025.
9	Parliament LLC Top agencies DOI (Department of the Interior)	$627,609	1.0%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
10	CCI Prime Contractors, LLC Top agencies DHS (Department of Homeland Security)	$559,144	0.9%	Rank history: not on the FY2021–FY2024 lists and #10 in FY2025; new, not ranked in Jul 2024–Jun 2025.
11	Astrea Technical Services LLC Top agencies USAF (Department of the Air Force)	$533,400	0.8%	Rank history: not on the FY2021–FY2024 lists and #11 in FY2025; new, not ranked in Jul 2024–Jun 2025.
12	Hurst-Rosche, Inc. Top agencies Army (Department of the Army)	$453,871	0.7%	Rank history: not on the FY2021 list, #18 in FY2022, #9 in FY2023, #18 in FY2024 and #22 in FY2025; up 2 since Jul 2024–Jun 2025.
13	TGS-Nopec Geophysical Company Through A2D Technologies, Inc. Top agencies DOI (Department of the Interior)	$325,068	0.5%	Rank history: not on the FY2021–FY2023 lists, #14 in FY2024 and #14 in FY2025; down 3 since Jul 2024–Jun 2025.
14	Norcatec LLC Top agencies DLA (Defense Logistics Agency)	$314,382	0.5%	Rank history: not on the FY2021–FY2024 lists and #45 in FY2025; new, not ranked in Jul 2024–Jun 2025.
15	Kclean KG Top agencies Army (Department of the Army)	$311,220	0.5%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
16	C & C Metals Engineering Inc. Top agencies DLA (Defense Logistics Agency)	$216,865	0.3%	Rank history: #26 in FY2021, not on the FY2022 list, #58 in FY2023, #49 in FY2024 and #12 in FY2025; up 1 since Jul 2024–Jun 2025.
17	Acty Co., Ltd. Top agencies Navy (Department of the Navy)	$186,644	0.3%	Rank history: #15 in FY2021, #20 in FY2022, #16 in FY2023, #20 in FY2024 and #19 in FY2025; new, not ranked in Jul 2024–Jun 2025.
18	ECI Defense Group, Inc. Top agencies DLA (Defense Logistics Agency)	$181,963	0.3%	Rank history: not on the FY2021 list, #33 in FY2022, #20 in FY2023, #31 in FY2024 and #7 in FY2025; down 9 since Jul 2024–Jun 2025.
19	Heesong Geotek Co., Ltd. Top agencies Army (Department of the Army) OSD (Office of the Secretary of Defense)	$146,730	0.2%	Rank history: not on the FY2021–FY2023 lists, #24 in FY2024 and #17 in FY2025; down 3 since Jul 2024–Jun 2025.
20	Mechatronics, Inc. Top agencies DLA (Defense Logistics Agency)	$132,306	0.2%	Rank history: #68 in FY2021, #32 in FY2022, #28 in FY2023, #22 in FY2024 and #18 in FY2025; up 2 since Jul 2024–Jun 2025.
21	Spees-Hernandez JV LLC Through Spees LLC Top agencies VA (Department of Veterans Affairs)	$116,985	0.2%	Rank history: not on the FY2021–FY2022 lists, #24 in FY2023, #28 in FY2024 and #25 in FY2025; up 4 since Jul 2024–Jun 2025.
22	TNN Machining Company, L.L.C. Top agencies DLA (Defense Logistics Agency)	$115,950	0.2%	Rank history: not on the FY2021–FY2024 lists and #65 in FY2025; new, not ranked in Jul 2024–Jun 2025.
23	Pluxee Pay Brasil LTDA Top agencies DOS (Department of State)	$115,648	0.2%	Rank history: not on the FY2021–FY2024 lists and #28 in FY2025; up 31 since Jul 2024–Jun 2025.
24	SKF USA Inc. Top agencies DLA (Defense Logistics Agency)	$103,429	0.2%	Rank history: not on the FY2021–FY2022 lists, #39 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
25	Advanced CNC Manufacturing, Inc. Top agencies DLA (Defense Logistics Agency)	$98,310	0.2%	Rank history: not on the FY2021–FY2022 lists, #10 in FY2023, #30 in FY2024 and #20 in FY2025; up 6 since Jul 2024–Jun 2025.
26	Wilson Precision Manufacturing LLC Top agencies DLA (Defense Logistics Agency)	$96,660	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
27	Seldovia Fuel and Lube, Inc. Top agencies Commerce (Department of Commerce)	$95,000	0.1%	Rank history: not on the FY2021–FY2022 lists, #38 in FY2023, #44 in FY2024 and #37 in FY2025; up 10 since Jul 2024–Jun 2025.
28	Ordnance Technology Service, Inc. Top agencies DLA (Defense Logistics Agency)	$87,542	0.1%	Rank history: #38 in FY2021, #66 in FY2022, #85 in FY2023, #57 in FY2024 and #13 in FY2025; down 13 since Jul 2024–Jun 2025.
29	Phoenix Contracting LLC Top agencies Navy (Department of the Navy)	$86,000	0.1%	Rank history: not on the FY2021–FY2023 lists, #23 in FY2024 and #21 in FY2025; down 9 since Jul 2024–Jun 2025.
30	Negocios Globales De Centroamerica SA De CV Top agencies DOS (Department of State)	$81,287	0.1%	Rank history: not on the FY2021–FY2024 lists and #78 in FY2025; new, not ranked in Jul 2024–Jun 2025.
31	Freightliner of Savannah, Inc. Top agencies DLA (Defense Logistics Agency)	$75,201	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
32	SAFRAN Through Safran Landing Systems Top agencies DLA (Defense Logistics Agency)	$73,501	0.1%	Rank history: not on the FY2021–FY2022 lists, #27 in FY2023, #34 in FY2024 and #48 in FY2025; up 15 since Jul 2024–Jun 2025.
33	Enverus, Inc. Top agencies DOI (Department of the Interior)	$71,532	0.1%	Rank history: #8 in FY2021, not on the FY2022 list, #30 in FY2023, #56 in FY2024 and #29 in FY2025; up 16 since Jul 2024–Jun 2025.
34	Larkos Packing and Distribution Inc. Top agencies DLA (Defense Logistics Agency)	$63,745	0.1%	Rank history: not on the FY2021–FY2023 lists, #47 in FY2024 and #54 in FY2025; up 35 since Jul 2024–Jun 2025.
35	MDF Technologies Inc. Top agencies DLA (Defense Logistics Agency)	$60,687	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
36	Airtronics, LLC Top agencies DLA (Defense Logistics Agency)	$59,832	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
37	Brown Helicopter, Inc. Top agencies DLA (Defense Logistics Agency)	$55,010	0.1%	Rank history: not on the FY2021–FY2023 lists, #77 in FY2024 and #42 in FY2025; up 62 since Jul 2024–Jun 2025.
38	PB Hoidale Co Inc. Top agencies USDA (Department of Agriculture) USAF (Department of the Air Force)	$52,715	0.1%	Rank history: not on the FY2021–FY2024 lists and #47 in FY2025; up 27 since Jul 2024–Jun 2025.
39	Moog Inc. Top agencies DLA (Defense Logistics Agency)	$50,890	0.1%	Rank history: not on the FY2021–FY2024 lists and #59 in FY2025; up 42 since Jul 2024–Jun 2025.
40	Clark Brothers Instrument Co Top agencies DLA (Defense Logistics Agency)	$47,310	0.1%	Rank history: not on the FY2021–FY2022 lists, #73 in FY2023, #55 in FY2024 and not on the FY2025 list; up 71 since Jul 2024–Jun 2025.
41	Fluid Solutions LLC Top agencies DOS (Department of State)	$43,533	0.1%	Rank history: #37 in FY2021, #64 in FY2022, #36 in FY2023, #79 in FY2024 and #39 in FY2025; up 27 since Jul 2024–Jun 2025.
42	Lynx FBO Anoka, LLC Through Fly Arkansas, LLC Top agencies USAF (Department of the Air Force)	$42,795	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
43	S & B, Inc. Top agencies DLA (Defense Logistics Agency)	$36,200	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
44	Spring Fountain Studios LLC Top agencies DOI (Department of the Interior)	$35,496	0.1%	Rank history: not on the FY2021–FY2024 lists and #44 in FY2025; new, not ranked in Jul 2024–Jun 2025.
45	Statz Corp Top agencies DLA (Defense Logistics Agency)	$35,353	0.1%	Rank history: not on the FY2021–FY2022 lists, #94 in FY2023 and not on the FY2024–FY2025 lists; up 65 since Jul 2024–Jun 2025.
46	Jamaica Bearings Co., Inc. Top agencies DLA (Defense Logistics Agency)	$29,543	<0.1%	Rank history: not on the FY2021 list, #85 in FY2022, #46 in FY2023, #54 in FY2024 and #32 in FY2025; down 17 since Jul 2024–Jun 2025.
47	Argo Turboserve Corporation Top agencies DLA (Defense Logistics Agency)	$28,143	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
48	Penn Keystone Coal Co LLC Top agencies DOI (Department of the Interior)	$26,243	<0.1%	Rank history: not on the FY2021–FY2024 lists and #56 in FY2025; new, not ranked in Jul 2024–Jun 2025.
49	Tidewater, Inc. Top agencies DOS (Department of State)	$25,763	<0.1%	Rank history: #75 in FY2021, not on the FY2022–FY2023 lists, #66 in FY2024 and #57 in FY2025; up 9 since Jul 2024–Jun 2025.
50	Aircraft Inventory Management and Services, Ltd. Top agencies DLA (Defense Logistics Agency)	$25,000	<0.1%	Rank history: not on the FY2021–FY2024 lists and #58 in FY2025; new, not ranked in Jul 2024–Jun 2025.
51	The Boeing Company Through Boeing Distribution Services X, Inc. Top agencies DLA (Defense Logistics Agency)	$24,895	<0.1%	Rank history: not on the FY2021 list, #57 in FY2022, #71 in FY2023, not on the FY2024 list and #75 in FY2025; up 33 since Jul 2024–Jun 2025.
52	Spaires Inc Top agencies DLA (Defense Logistics Agency)	$22,145	<0.1%	Rank history: not on the FY2021–FY2023 lists, #45 in FY2024 and #40 in FY2025; down 16 since Jul 2024–Jun 2025.
53	Kampi Components Co Inc. Top agencies DLA (Defense Logistics Agency)	$20,824	<0.1%	Rank history: #83 in FY2021, #78 in FY2022, #60 in FY2023, not on the FY2024 list and #36 in FY2025; down 12 since Jul 2024–Jun 2025.
54	Optiplex LLC Top agencies DLA (Defense Logistics Agency)	$20,156	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
55	W.p.e., Inc. Top agencies DLA (Defense Logistics Agency)	$19,579	<0.1%	Rank history: not on the FY2021–FY2024 lists and #63 in FY2025; new, not ranked in Jul 2024–Jun 2025.
56	Petroleum Equipment, Inc. Top agencies VA (Department of Veterans Affairs)	$19,355	<0.1%	Rank history: #94 in FY2021, #63 in FY2022, #86 in FY2023, #70 in FY2024 and #30 in FY2025; down 22 since Jul 2024–Jun 2025.
57	Global Logistics Strategies Inc. Top agencies DLA (Defense Logistics Agency)	$19,342	<0.1%	Rank history: not on the FY2021–FY2024 lists and #62 in FY2025; new, not ranked in Jul 2024–Jun 2025.
58	Clarke Power Services Inc. Top agencies DLA (Defense Logistics Agency)	$18,861	<0.1%	Rank history: not on the FY2021–FY2024 lists and #60 in FY2025; up 2 since Jul 2024–Jun 2025.
59	General Dynamics Corporation 2 awardees, including General Dynamics-Ots, Inc. and Electric Boat Corporation Top agencies DLA (Defense Logistics Agency)	$17,306	<0.1%	Rank history: #34 in FY2021, #25 in FY2022, #43 in FY2023, #74 in FY2024 and #34 in FY2025; down 24 since Jul 2024–Jun 2025.
60	RIX Industries Top agencies DLA (Defense Logistics Agency)	$15,876	<0.1%	Rank history: #43 in FY2021, #62 in FY2022, #74 in FY2023, #39 in FY2024 and #50 in FY2025; down 9 since Jul 2024–Jun 2025.
61	Stampede Die Corp Top agencies DLA (Defense Logistics Agency)	$15,680	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
62	MXM Logistics LLC Top agencies DLA (Defense Logistics Agency)	$15,620	<0.1%	Rank history: not on the FY2021–FY2024 lists and #88 in FY2025; up 33 since Jul 2024–Jun 2025.
63	Kerr United Group LLC Top agencies DOI (Department of the Interior)	$15,512	<0.1%	Rank history: not on the FY2021–FY2024 lists and #72 in FY2025; new, not ranked in Jul 2024–Jun 2025.
64	Johnson & Towers LLC Top agencies DLA (Defense Logistics Agency)	$13,741	<0.1%	Rank history: not on the FY2021–FY2023 lists, #37 in FY2024 and #77 in FY2025; up 18 since Jul 2024–Jun 2025.
65	All-Safe Inc. Top agencies DLA (Defense Logistics Agency)	$13,280	<0.1%	Rank history: #65 in FY2021, not on the FY2022 list, #70 in FY2023, #36 in FY2024 and not on the FY2025 list; down 25 since Jul 2024–Jun 2025.
66	Jgils, LLC Top agencies DLA (Defense Logistics Agency)	$13,203	<0.1%	Rank history: not on the FY2021–FY2022 lists, #88 in FY2023, not on the FY2024 list and #84 in FY2025; up 24 since Jul 2024–Jun 2025.
67	American Indian Health & Services Corporation Through Circor Naval Solutions LLC Top agencies DLA (Defense Logistics Agency)	$12,792	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
68	Krobach Mfg. Corp. Top agencies DLA (Defense Logistics Agency)	$12,462	<0.1%	Rank history: not on the FY2021–FY2022 lists, #87 in FY2023, #88 in FY2024 and #67 in FY2025; down 4 since Jul 2024–Jun 2025.
69	J5 Enterprises, LLC Top agencies DLA (Defense Logistics Agency)	$11,645	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
70	Secure Components, LLC Top agencies DLA (Defense Logistics Agency)	$10,640	<0.1%	Rank history: not on the FY2021–FY2024 lists and #85 in FY2025; new, not ranked in Jul 2024–Jun 2025.
71	Bourbon Seals LLC Top agencies DLA (Defense Logistics Agency)	$10,091	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
72	Code Steel Industrial Inspections LLC Top agencies USAF (Department of the Air Force)	$9,924	<0.1%	Rank history: not on the FY2021 list, #46 in FY2022, not on the FY2023 list, #60 in FY2024 and #49 in FY2025; down 24 since Jul 2024–Jun 2025.
73	6B Parts LLC Top agencies DLA (Defense Logistics Agency)	$9,805	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
74	Basic Rubber and Plastics Co. Top agencies DLA (Defense Logistics Agency)	$9,451	<0.1%	Rank history: not on the FY2021 list, #84 in FY2022, #91 in FY2023, not on the FY2024 list and #82 in FY2025; up 26 since Jul 2024–Jun 2025.
75	Midway Industrial Supply Inc. Top agencies DLA (Defense Logistics Agency)	$9,165	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
76	Aviarms Support Corp Top agencies DLA (Defense Logistics Agency)	$9,125	<0.1%	Rank history: not on the FY2021 list, #69 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
77	Alaska Fuel Systems Inc. Top agencies DOI (Department of the Interior)	$8,500	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
78	Alamo Aircraft, Ltd. Top agencies DLA (Defense Logistics Agency)	$8,325	<0.1%	Rank history: not on the FY2021–FY2024 lists and #92 in FY2025; up 84 since Jul 2024–Jun 2025.
79	Intercontinental Bearing Supply Company Inc. Top agencies DLA (Defense Logistics Agency)	$7,988	<0.1%	Rank history: not on the FY2021–FY2023 lists, #99 in FY2024 and #90 in FY2025; up 4 since Jul 2024–Jun 2025.
80	Etek Tool & Manufacturing LLC Top agencies DLA (Defense Logistics Agency)	$7,892	<0.1%	Rank history: not on the FY2021–FY2024 lists and #96 in FY2025; new, not ranked in Jul 2024–Jun 2025.
81	Johnson Controls Navy Systems, LLC Top agencies DLA (Defense Logistics Agency)	$7,521	<0.1%	Rank history: not on the FY2021–FY2024 lists and #71 in FY2025; up 21 since Jul 2024–Jun 2025.
82	Lobo Ventures Ltd Top agencies DLA (Defense Logistics Agency)	$7,500	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
83	Leak Detection Service Inc. Top agencies USAF (Department of the Air Force)	$7,500	<0.1%	Rank history: not on the FY2021 list, #93 in FY2022, #98 in FY2023, not on the FY2024 list and #99 in FY2025; up 22 since Jul 2024–Jun 2025.
84	Billet Industries Inc. Top agencies DLA (Defense Logistics Agency)	$7,400	<0.1%	Rank history: not on the FY2021–FY2022 lists, #79 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
85	Duke's Aerospace, Inc. Top agencies DLA (Defense Logistics Agency)	$7,350	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
86	Btid Parts LLC Top agencies DLA (Defense Logistics Agency)	$7,129	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
87	Scioteq LLC Through Transdigm Inc. Top agencies DLA (Defense Logistics Agency)	$6,980	<0.1%	Rank history: not on the FY2021–FY2023 lists, #94 in FY2024 and not on the FY2025 list; new, not ranked in Jul 2024–Jun 2025.
88	Skyspares Parts Inc. Top agencies DLA (Defense Logistics Agency)	$6,836	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
89	Penn Power Group LLC Top agencies DLA (Defense Logistics Agency)	$6,670	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
90	CRS Gida Danismanlik E-Ticaret VE Pazarlama Limited Sirketi Top agencies DLA (Defense Logistics Agency)	$6,605	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
91	Mass Tank Inspection Services LLC Top agencies Army (Department of the Army)	$6,174	<0.1%	Rank history: #61 in FY2021, #79 in FY2022, #78 in FY2023, not on the FY2024 list and #79 in FY2025; down 20 since Jul 2024–Jun 2025.
92	G.t. Machining & Fabricating Ltd. Top agencies DLA (Defense Logistics Agency)	$5,755	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
93	Olmar Supply, Inc. Top agencies DLA (Defense Logistics Agency)	$5,700	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
94	Hydraulics International, Inc. Top agencies DLA (Defense Logistics Agency)	$5,492	<0.1%	Rank history: #74 in FY2021, #75 in FY2022, not on the FY2023 list, #72 in FY2024 and not on the FY2025 list; down 3 since Jul 2024–Jun 2025.
95	AMZ Alabama Inc. Top agencies DLA (Defense Logistics Agency)	$5,417	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
96	Pioneer Industries, LLC Top agencies DLA (Defense Logistics Agency)	$5,200	<0.1%	Rank history: #24 in FY2021, not on the FY2022–FY2024 lists and #70 in FY2025; down 20 since Jul 2024–Jun 2025.
97	Timothy R George Top agencies DOI (Department of the Interior)	$5,158	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
98	Wynnson Enterprises, Inc. Top agencies DLA (Defense Logistics Agency)	$5,119	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
99	Spec TECH USA Inc. Top agencies DLA (Defense Logistics Agency)	$4,951	<0.1%	Rank history: not on the FY2021–FY2022 lists, #97 in FY2023, #80 in FY2024 and not on the FY2025 list; up 62 since Jul 2024–Jun 2025.
100	Equipment Parts Sales Top agencies DLA (Defense Logistics Agency)	$4,920	<0.1%	Rank history: not on the FY2021–FY2023 lists, #100 in FY2024 and not on the FY2025 list; up 27 since Jul 2024–Jun 2025.

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100 of 175 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 2131

Code	Net obligations	Largest contractor
21311 Support Activities for Mining	$62,368,270	Promethean Operating I 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 $64 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. 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 2131 contractors in Jul 2025–Jun 2026?

1. Promethean Operating I LLC ($30.1M), 2. Arctic Slope Regional Corporation ($9.51M), 3. Olgoonik Oilfield Services LLC ($7.57M), 4. Olgoonik Construction Services LLC ($2.46M), 5. Chet Morrison Contractors LLC ($2.09M), 6. Jordan Modern Oil & Fuel Services Ltd. Co. ($1.92M), 7. Brice Solutions, LLC ($1.49M), 8. E2 Contracting, Inc. ($706K), 9. Parliament LLC ($628K), 10. CCI Prime Contractors, LLC ($559K).

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