Top 30 Contractors in NAICS 33313: Mining and Oil and Gas Field Machinery Manufacturing, Jul 2025–Jun 2026

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	S.l. Ross Environmental Research Limited Top agencies DOI (Department of the Interior)	$1,374,044	40.3%	Rank history: not on the FY2021–FY2024 lists and #1 in FY2025; new, not ranked in Jul 2024–Jun 2025.
2	Prymol Business Management Inc. Top agencies USAF (Department of the Air Force)	$405,547	11.9%	Rank history: not on the FY2021–FY2024 lists and #2 in FY2025; new, not ranked in Jul 2024–Jun 2025.
3	Sepor, Inc. Top agencies DOE (Department of Energy)	$295,070	8.7%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
4	Heesong Geotek Co., Ltd. Top agencies Army (Department of the Army)	$217,279	6.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
5	Oil States Industries, Inc. Top agencies Navy (Department of the Navy)	$181,677	5.3%	Rank history: not on the FY2021–FY2024 lists and #7 in FY2025; new, not ranked in Jul 2024–Jun 2025.
6	American Material Handling, Inc. Top agencies DOS (Department of State)	$97,656	2.9%	Rank history: not on the FY2021–FY2024 lists and #6 in FY2025; new, not ranked in Jul 2024–Jun 2025.
7	Cryo Associates Inc Top agencies Navy (Department of the Navy)	$87,010	2.6%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
8	Eleet Cryogenics Inc. Top agencies Navy (Department of the Navy)	$83,585	2.5%	Rank history: not on the FY2021–FY2024 lists and #8 in FY2025; new, not ranked in Jul 2024–Jun 2025.
9	FSR Consulting LLC Top agencies Army (Department of the Army)	$77,597	2.3%	Rank history: #33 in FY2021, not on the FY2022–FY2024 lists and #9 in FY2025; new, not ranked in Jul 2024–Jun 2025.
10	Dejana Truck & Utility Equipment Co, LLC Top agencies DLA (Defense Logistics Agency)	$66,720	2.0%	Rank history: #3 in FY2021 and not on the FY2022–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
11	Golden Lines Contracting Company Top agencies Army (Department of the Army)	$58,400	1.7%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
12	Modern Machinery Co., Inc. Top agencies DOI (Department of the Interior)	$53,877	1.6%	Rank history: not on the FY2021–FY2024 lists and #11 in FY2025; new, not ranked in Jul 2024–Jun 2025.
13	Bayfront Metal Products LLC Top agencies DLA (Defense Logistics Agency)	$29,640	0.9%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
14	Quintessential Management, LLC Top agencies Army (Department of the Army)	$25,983	0.8%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
15	Century Geophysical, LLC Top agencies DOI (Department of the Interior)	$22,720	0.7%	Rank history: not on the FY2021 list, #19 in FY2022, not on the FY2023–FY2024 lists and #5 in FY2025; down 7 since Jul 2024–Jun 2025.
16	Larkos Packing and Distribution Inc. Top agencies DLA (Defense Logistics Agency)	$18,087	0.5%	Rank history: not on the FY2021–FY2023 lists, #34 in FY2024 and #18 in FY2025; up 8 since Jul 2024–Jun 2025.
17	Central Mine Equipment Company Top agencies Army (Department of the Army)	$17,903	0.5%	Rank history: #19 in FY2021, #4 in FY2022, #3 in FY2023, #1 in FY2024 and #10 in FY2025; down 5 since Jul 2024–Jun 2025.
18	Yellow Tag Auctions, LLC Top agencies USDA (Department of Agriculture)	$15,000	0.4%	Rank history: not on the FY2021–FY2024 lists and #16 in FY2025; new, not ranked in Jul 2024–Jun 2025.
19	Kampi Components Co Inc. Top agencies DLA (Defense Logistics Agency)	$12,689	0.4%	Rank history: #27 in FY2021, not on the FY2022–FY2023 lists, #33 in FY2024 and #12 in FY2025; down 3 since Jul 2024–Jun 2025.
20	May Tool Inc. Top agencies DLA (Defense Logistics Agency)	$10,185	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
21	Premier & Companies, Inc. Top agencies Navy (Department of the Navy)	$8,680	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
22	Becker and Associates, LLC Top agencies DLA (Defense Logistics Agency)	$8,560	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
23	Sky Mart Sales Corp. Top agencies DLA (Defense Logistics Agency)	$7,350	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
24	Seahorse Defense Supply, LLC Top agencies DLA (Defense Logistics Agency)	$6,908	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
25	S I T Corporation Top agencies DLA (Defense Logistics Agency)	$2,799	0.1%	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.
26	American Power LLC Top agencies DLA (Defense Logistics Agency)	$1,920	0.1%	Rank history: not on the FY2021–FY2024 lists and #24 in FY2025; new, not ranked in Jul 2024–Jun 2025.
27	Safeware Inc. Top agencies DLA (Defense Logistics Agency)	$552	<0.1%	Rank history: not on the FY2021–FY2024 lists and #27 in FY2025; new, not ranked in Jul 2024–Jun 2025.
28	Arbill Industries Inc. Top agencies DLA (Defense Logistics Agency)	$515	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
29	Hoosier Industrial Supply, Inc. Top agencies DLA (Defense Logistics Agency)	$172	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
30	Allied Tools Inc Top agencies DLA (Defense Logistics Agency)	$45	<0.1%	Rank history: not on the FY2021–FY2022 lists, #39 in FY2023, #37 in FY2024 and not on the FY2025 list; new, not ranked in Jul 2024–Jun 2025.

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 $3.41 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.

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