Top 26 Contractors in PSC Z1PD: Maintenance of Waste Treatment and Storage Facilities, FY2021

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Amentum Services, Inc. Through Central Plateau Cleanup Company, LLC Top agencies DOE (Department of Energy) Navy (Department of the Navy)	$440,197,896	95.9%	Rank history: not on the FY2025 list; unchanged since FY2020.
2	Perc Water Corporation Top agencies Navy (Department of the Navy)	$3,314,967	0.7%	Rank history: #2 in FY2025; up 1 since FY2020.
3	Ecodit LLC Top agencies USAID (US Agency for International Development)	$2,000,000	0.4%	Rank history: #4 in FY2025; down 1 since FY2020.
4	Quadrant Construction Inc. Top agencies Navy (Department of the Navy)	$1,428,000	0.3%	Rank history: not on the FY2025 list; new, not ranked in FY2020.
5	Eacm Corp Top agencies DOI (Department of the Interior)	$999,494	0.2%	Rank history: not on the FY2025 list; new, not ranked in FY2020.
6	Central Plateau Cleanup Company, LLC Top agencies DOE (Department of Energy)	$840,000	0.2%	Rank history: not on the FY2025 list; up 1 since FY2020.
7	Medvolt, LLC Top agencies Army (Department of the Army)	$319,896	0.1%	Rank history: not on the FY2025 list; up 1 since FY2020.
8	Suya Corporation Top agencies Navy (Department of the Navy)	$310,440	0.1%	Rank history: not on the FY2025 list; new, not ranked in FY2020.
9	Core Contracting Group Top agencies DOI (Department of the Interior)	$176,161	<0.1%	Rank history: not on the FY2025 list; down 5 since FY2020.
10	KJS Support Services Joint Venture LLC Top agencies Navy (Department of the Navy)	$132,181	<0.1%	Rank history: not on the FY2025 list; up 3 since FY2020.
11	Kotobuki Kankyoh Kizai Co.,Ltd. Top agencies Navy (Department of the Navy)	$118,695	<0.1%	Rank history: #13 in FY2025; up 6 since FY2020.
12	Green and Sustainable Services, LLC Top agencies USAF (Department of the Air Force)	$103,183	<0.1%	Rank history: not on the FY2025 list; up 8 since FY2020.
13	Texas Aquastore Inc. Top agencies DOI (Department of the Interior)	$91,054	<0.1%	Rank history: not on the FY2025 list; new, not ranked in FY2020.
14	Kobakyu, K.K. Top agencies Army (Department of the Army)	$86,988	<0.1%	Rank history: #10 in FY2025; up 2 since FY2020.
15	Yamaki Co., Ltd. Top agencies Navy (Department of the Navy)	$70,045	<0.1%	Rank history: not on the FY2025 list; new, not ranked in FY2020.
16	Deshotel, Luke Top agencies DOJ (Department of Justice)	$38,776	<0.1%	Rank history: not on the FY2025 list; up 12 since FY2020.
17	Mather & Sons Pump Service, Inc. Top agencies DOI (Department of the Interior)	$32,576	<0.1%	Rank history: not on the FY2025 list; down 6 since FY2020.
18	Krätz GMBH Top agencies Army (Department of the Army)	$26,955	<0.1%	Rank history: #18 in FY2025; up 8 since FY2020.
19	Ore Power LLC Top agencies Army (Department of the Army)	$17,188	<0.1%	Rank history: not on the FY2025 list; up 11 since FY2020.
20	Oreogin, Inc. Top agencies USAF (Department of the Air Force)	$16,400	<0.1%	Rank history: not on the FY2025 list; up 9 since FY2020.
21	Innovative Measuring Systems, Inc. Top agencies Army (Department of the Army)	$16,000	<0.1%	Rank history: #25 in FY2025; new, not ranked in FY2020.
22	A Plus Home Services Inc. Top agencies USDA (Department of Agriculture)	$9,099	<0.1%	Rank history: not on the FY2025 list; up 10 since FY2020.
23	Oddo Construction Services, LLC Top agencies Army (Department of the Army)	$8,693	<0.1%	Rank history: not on the FY2025 list; down 17 since FY2020.
24	LE Pew Porta-Johns, Inc. Top agencies USDA (Department of Agriculture)	$8,140	<0.1%	Rank history: not on the FY2025 list; new, not ranked in FY2020.
25	Gsi-Asi JV, LLC Top agencies Navy (Department of the Navy)	$3,573	<0.1%	Rank history: not on the FY2025 list; new, not ranked in FY2020.
26	Katayama Shoji Inc. Top agencies USAF (Department of the Air Force)	$1,288	<0.1%	Rank history: not on the FY2025 list; up 7 since FY2020.

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 $459 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.
• Fiscal year 2021 ran Oct 1, 2020 – Sep 30, 2021. 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 FY2020. "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 FY2020 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.

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