Top 100 Contractors in NAICS 22132: Sewage Treatment Facilities, Aug 2025–Jul 2026

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Veolia Water West Operating Services Inc. Top agencies IBWC (International Boundary and Water Commission U.S.-Mexico)	$51,646,513	19.6%	Rank history: not on the FY2021–FY2023 lists, #4 in FY2024 and #1 in FY2025; up 5 since Aug 2024–Jul 2025.
2	Aqua Engineers Inc. Top agencies Army (Department of the Army)	$28,162,553	10.7%	Rank history: #1 in FY2021, #2 in FY2022, #1 in FY2023, #2 in FY2024 and #2 in FY2025; up 1 since Aug 2024–Jul 2025.
3	Foreign Utility Consolidated Reporting Top agencies Army (Department of the Army)	$22,261,378	8.4%	Rank history: #4 in FY2021, #4 in FY2022, #5 in FY2023, #6 in FY2024 and #6 in FY2025; up 1 since Aug 2024–Jul 2025.
4	Sunstate Environmental Services Inc. Top agencies IBWC (International Boundary and Water Commission U.S.-Mexico)	$17,520,666	6.6%	Rank history: not on the FY2021–FY2024 lists and #4 in FY2025; new, not ranked in Aug 2024–Jul 2025.
5	American Water Works Company Inc. Through American Water Military Services, LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$17,141,952	6.5%	Rank history: #3 in FY2021, #1 in FY2022, #3 in FY2023, #1 in FY2024 and #3 in FY2025; down 3 since Aug 2024–Jul 2025.
6	American States Water Company 2 awardees, including Old Dominion Utility Services, Inc. and American States Utility Services Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$17,132,968	6.5%	Rank history: not on the FY2021–FY2023 lists, #3 in FY2024 and #5 in FY2025; down 5 since Aug 2024–Jul 2025.
7	Nikken Sogyo Co., Ltd. Top agencies Navy (Department of the Navy)	$14,110,472	5.3%	Rank history: #5 in FY2021, #7 in FY2022, #6 in FY2023, #7 in FY2024 and #7 in FY2025; down 2 since Aug 2024–Jul 2025.
8	Bairco Construction Inc. Top agencies DOI (Department of the Interior)	$11,628,532	4.4%	Rank history: not on the FY2021–FY2024 lists and #8 in FY2025; new, not ranked in Aug 2024–Jul 2025.
9	City of Aberdeen Top agencies Army (Department of the Army)	$8,752,210	3.3%	Rank history: #7 in FY2021, #8 in FY2022, #7 in FY2023, #5 in FY2024 and #10 in FY2025; down 2 since Aug 2024–Jul 2025.
10	Riverbend Water Resources District Top agencies Army (Department of the Army)	$4,958,000	1.9%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
11	Nikken-Metawater JV Top agencies Navy (Department of the Navy)	$4,845,757	1.8%	Rank history: not on the FY2021–FY2022 lists, #10 in FY2023, #14 in FY2024 and #13 in FY2025; up 1 since Aug 2024–Jul 2025.
12	South Granville Water & Sewer Auth Top agencies DOJ (Department of Justice)	$4,753,804	1.8%	Rank history: #11 in FY2021, #11 in FY2022, #11 in FY2023, #13 in FY2024 and #12 in FY2025; down 2 since Aug 2024–Jul 2025.
13	Tama City Hall Top agencies USAF (Department of the Air Force)	$4,748,901	1.8%	Rank history: not on the FY2021 list, #6 in FY2022, #8 in FY2023, #10 in FY2024 and #11 in FY2025; down 4 since Aug 2024–Jul 2025.
14	KLJ Services LLC Top agencies Navy (Department of the Navy)	$4,494,085	1.7%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
15	Anchorage, Municipality of Inc Through Municipality of Anchorage Top agencies USAF (Department of the Air Force)	$4,128,728	1.6%	Rank history: #18 in FY2021, #12 in FY2022, #13 in FY2023, #16 in FY2024 and #15 in FY2025; new, not ranked in Aug 2024–Jul 2025.
16	Florida Keys Aqueduct Authority Top agencies Navy (Department of the Navy)	$3,543,713	1.3%	Rank history: not on the FY2021–FY2023 lists, #53 in FY2024 and #16 in FY2025; down 3 since Aug 2024–Jul 2025.
17	Harnett, County of North Carolina Top agencies Army (Department of the Army)	$3,155,476	1.2%	Rank history: #13 in FY2021, #20 in FY2022, #14 in FY2023, #17 in FY2024 and #17 in FY2025; down 2 since Aug 2024–Jul 2025.
18	P D R Properties, Inc. Top agencies Army (Department of the Army)	$2,916,015	1.1%	Rank history: not on the FY2021–FY2023 lists, #11 in FY2024 and #14 in FY2025; down 7 since Aug 2024–Jul 2025.
19	Bartow County Government Top agencies Army (Department of the Army)	$2,593,360	1.0%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
20	Optech-Monette, LLC Top agencies USAF (Department of the Air Force)	$1,891,641	0.7%	Rank history: #14 in FY2021, #13 in FY2022, #12 in FY2023, #15 in FY2024 and #18 in FY2025; down 4 since Aug 2024–Jul 2025.
21	City of Hopewell Hrwtf Top agencies DOJ (Department of Justice)	$1,875,226	0.7%	Rank history: not on the FY2021–FY2023 lists, #31 in FY2024 and #20 in FY2025; down 4 since Aug 2024–Jul 2025.
22	Perc Water Corporation Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$1,490,597	0.6%	Rank history: #9 in FY2021, #9 in FY2022, #9 in FY2023, #9 in FY2024 and #9 in FY2025; down 14 since Aug 2024–Jul 2025.
23	Crico Enterprise, LLC Top agencies Army (Department of the Army)	$1,441,578	0.5%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
24	Optimum Environmental Corporation Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$1,391,849	0.5%	Rank history: #50 in FY2021, #53 in FY2022, #37 in FY2023, #30 in FY2024 and #19 in FY2025; unchanged since Aug 2024–Jul 2025.
25	C-A Native Constructors Inc. Top agencies Army (Department of the Army)	$1,305,863	0.5%	Rank history: not on the FY2021–FY2024 lists and #22 in FY2025; new, not ranked in Aug 2024–Jul 2025.
26	Village of Saranac Lake Top agencies DOJ (Department of Justice)	$1,176,034	0.4%	Rank history: #31 in FY2021, #26 in FY2022, #23 in FY2023, #27 in FY2024 and #26 in FY2025; up 5 since Aug 2024–Jul 2025.
27	City of Leavenworth KS Top agencies Army (Department of the Army)	$1,131,304	0.4%	Rank history: #35 in FY2021, #28 in FY2022, #32 in FY2023, #28 in FY2024 and #25 in FY2025; down 1 since Aug 2024–Jul 2025.
28	Town of North Hempstead Top agencies DOT (Department of Transportation)	$1,072,113	0.4%	Rank history: not on the FY2021–FY2024 lists and #24 in FY2025; down 5 since Aug 2024–Jul 2025.
29	Project Solutions, Inc. Top agencies USAF (Department of the Air Force) USDA (Department of Agriculture)	$988,751	0.4%	Rank history: #52 in FY2021, #43 in FY2022, #31 in FY2023, #29 in FY2024 and #34 in FY2025; unchanged since Aug 2024–Jul 2025.
30	City of Pekin Top agencies DOJ (Department of Justice)	$958,488	0.4%	Rank history: #42 in FY2021, #42 in FY2022, #40 in FY2023, #41 in FY2024 and #30 in FY2025; up 2 since Aug 2024–Jul 2025.
31	Lee County VA Through County of Lee Top agencies DOJ (Department of Justice)	$952,435	0.4%	Rank history: #33 in FY2021, #37 in FY2022, #27 in FY2023, #25 in FY2024 and #23 in FY2025; up 32 since Aug 2024–Jul 2025.
32	Paintsville Utilities Commission Top agencies DOJ (Department of Justice)	$875,914	0.3%	Rank history: #94 in FY2021, not on the FY2022–FY2023 lists, #39 in FY2024 and #35 in FY2025; up 2 since Aug 2024–Jul 2025.
33	Lafayette Township Top agencies DOJ (Department of Justice)	$851,397	0.3%	Rank history: #54 in FY2021, #40 in FY2022, #36 in FY2023, #34 in FY2024 and #32 in FY2025; down 3 since Aug 2024–Jul 2025.
34	Herlong Public Utility District Top agencies DOJ (Department of Justice) Army (Department of the Army)	$827,171	0.3%	Rank history: #41 in FY2021, not on the FY2022 list, #75 in FY2023, #38 in FY2024 and #31 in FY2025; down 7 since Aug 2024–Jul 2025.
35	Waymart Area Authority Top agencies DOJ (Department of Justice)	$783,119	0.3%	Rank history: not on the FY2021–FY2023 lists, #43 in FY2024 and #39 in FY2025; up 11 since Aug 2024–Jul 2025.
36	DCS Infrastructure, LLC Top agencies VA (Department of Veterans Affairs)	$662,140	0.3%	Rank history: #19 in FY2021, #18 in FY2022, #20 in FY2023, #20 in FY2024 and #28 in FY2025; down 11 since Aug 2024–Jul 2025.
37	San Antonio River Authority Top agencies USAF (Department of the Air Force)	$636,187	0.2%	Rank history: #26 in FY2021, #25 in FY2022, #19 in FY2023, #37 in FY2024 and #33 in FY2025; down 4 since Aug 2024–Jul 2025.
38	Kent County Government Top agencies USAF (Department of the Air Force)	$516,628	0.2%	Rank history: #57 in FY2021, #51 in FY2022, #47 in FY2023, #40 in FY2024 and #37 in FY2025; down 10 since Aug 2024–Jul 2025.
39	Fremont Sanitation District Top agencies DOJ (Department of Justice)	$499,141	0.2%	Rank history: #48 in FY2021, #39 in FY2022, not on the FY2023 list, #35 in FY2024 and #36 in FY2025; down 4 since Aug 2024–Jul 2025.
40	City of Berlin Top agencies DOJ (Department of Justice)	$489,299	0.2%	Rank history: not on the FY2021–FY2023 lists, #45 in FY2024 and #38 in FY2025; down 4 since Aug 2024–Jul 2025.
41	Al Musairie Trading & Contracting Company -Qatar Top agencies USAF (Department of the Air Force)	$462,240	0.2%	Rank history: not on the FY2021–FY2024 lists and #40 in FY2025; down 4 since Aug 2024–Jul 2025.
42	Lowndes County Board of Commissioners Top agencies USAF (Department of the Air Force)	$446,066	0.2%	Rank history: #59 in FY2021, #54 in FY2022, #45 in FY2023, #21 in FY2024 and #29 in FY2025; down 24 since Aug 2024–Jul 2025.
43	Low Country Water Services, LLC Top agencies USAF (Department of the Air Force)	$429,944	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
44	Schwarz Construction LLC Top agencies Army (Department of the Army)	$400,000	0.2%	Rank history: not on the FY2021–FY2022 lists, #18 in FY2023, #19 in FY2024 and #21 in FY2025; down 25 since Aug 2024–Jul 2025.
45	Waterworkforce Inc. Top agencies USDA (Department of Agriculture)	$384,223	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
46	Confederated Tribes of the Umatilla Indian Reservation Through Cayuse Federal Services LLC Top agencies Navy (Department of the Navy)	$358,983	0.1%	Rank history: not on the FY2021–FY2024 lists and #44 in FY2025; new, not ranked in Aug 2024–Jul 2025.
47	Sarandrea Associates Group Corp Top agencies USAF (Department of the Air Force)	$342,555	0.1%	Rank history: not on the FY2021–FY2023 lists, #66 in FY2024 and #46 in FY2025; down 2 since Aug 2024–Jul 2025.
48	Pacific Northwest Environmental Services LLC Top agencies USDA (Department of Agriculture)	$339,572	0.1%	Rank history: #74 in FY2021, #72 in FY2022, #59 in FY2023, #50 in FY2024 and #53 in FY2025; up 5 since Aug 2024–Jul 2025.
49	Sociedade De Empreitadas E Trabalhos Hidraulicos, S.A. Top agencies USAF (Department of the Air Force)	$338,881	0.1%	Rank history: not on the FY2021–FY2023 lists, #49 in FY2024 and #45 in FY2025; down 5 since Aug 2024–Jul 2025.
50	Fineeco Top agencies Army (Department of the Army)	$313,405	0.1%	Rank history: not on the FY2021–FY2024 lists and #60 in FY2025; up 36 since Aug 2024–Jul 2025.
51	Nsp-Bch, LLC Top agencies USAF (Department of the Air Force)	$311,948	0.1%	Rank history: not on the FY2021–FY2022 lists, #61 in FY2023, #51 in FY2024 and #47 in FY2025; down 4 since Aug 2024–Jul 2025.
52	Mission Critical Environmental, LLC Top agencies Army (Department of the Army)	$308,799	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
53	Water Management Services, Inc. Top agencies VA (Department of Veterans Affairs)	$306,540	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
54	City of Manchester Top agencies DOJ (Department of Justice)	$301,553	0.1%	Rank history: not on the FY2021 list, #55 in FY2022, #60 in FY2023, #47 in FY2024 and #58 in FY2025; up 5 since Aug 2024–Jul 2025.
55	Hennesy Mechanical Sales LLC Top agencies DOI (Department of the Interior)	$263,369	0.1%	Rank history: not on the FY2021–FY2024 lists and #54 in FY2025; new, not ranked in Aug 2024–Jul 2025.
56	Nicklaus Engineering, Inc. Top agencies Army (Department of the Army)	$260,623	0.1%	Rank history: #62 in FY2021, #67 in FY2022, #84 in FY2023, #52 in FY2024 and #70 in FY2025; up 10 since Aug 2024–Jul 2025.
57	Gregg Township Municipal Authority Top agencies DOJ (Department of Justice)	$258,417	0.1%	Rank history: #30 in FY2021, #33 in FY2022, #24 in FY2023, #24 in FY2024 and #27 in FY2025; down 35 since Aug 2024–Jul 2025.
58	City of Alexandria Virginia Sanitation Authority Top agencies WHS (DOD Washington Headquarters Service)	$257,933	0.1%	Rank history: #75 in FY2021, not on the FY2022 list, #72 in FY2023, #80 in FY2024 and #56 in FY2025; down 3 since Aug 2024–Jul 2025.
59	NAC Heavy Highway Inc. Top agencies Army (Department of the Army)	$249,000	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
60	Illinois-American Water Company Top agencies DOJ (Department of Justice)	$233,450	0.1%	Rank history: not on the FY2021–FY2024 lists and #68 in FY2025; up 4 since Aug 2024–Jul 2025.
61	Gotemba Eiseisha, Co. Ltd. Top agencies Navy (Department of the Navy)	$226,533	0.1%	Rank history: #71 in FY2021, #63 in FY2022, #64 in FY2023, #56 in FY2024 and #57 in FY2025; down 5 since Aug 2024–Jul 2025.
62	A&G Septic and Grease LLC Top agencies DOJ (Department of Justice)	$215,849	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
63	City of Anadarko City Hall Top agencies DOI (Department of the Interior)	$201,517	0.1%	Rank history: not on the FY2021 list, #87 in FY2022, #92 in FY2023, #42 in FY2024 and #55 in FY2025; down 9 since Aug 2024–Jul 2025.
64	Southwest Fluid Systems, LLC Top agencies DOJ (Department of Justice)	$192,210	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
65	Kankyo Gijutsu KK Top agencies USAF (Department of the Air Force)	$170,399	0.1%	Rank history: #79 in FY2021, #71 in FY2022, #66 in FY2023, #62 in FY2024 and #63 in FY2025; down 4 since Aug 2024–Jul 2025.
66	Sankyo Denki Koji Co.,Ltd. Top agencies Navy (Department of the Navy)	$167,430	0.1%	Rank history: #88 in FY2021, #81 in FY2022, not on the FY2023–FY2024 lists and #66 in FY2025; new, not ranked in Aug 2024–Jul 2025.
67	Schwandorfer Umwelttechnik GMBH Top agencies Army (Department of the Army)	$156,079	0.1%	Rank history: not on the FY2021–FY2022 lists, #93 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
68	Urban Construction Bureau, Sagamihara City Top agencies Army (Department of the Army)	$145,182	0.1%	Rank history: not on the FY2021 list, #76 in FY2022, #77 in FY2023, #65 in FY2024 and #65 in FY2025; down 6 since Aug 2024–Jul 2025.
69	Denver Board of Water Commissioners Top agencies Treasury (Department of the Treasury)	$142,535	0.1%	Rank history: not on the FY2021 list, #78 in FY2022, #76 in FY2023, #60 in FY2024 and #78 in FY2025; up 6 since Aug 2024–Jul 2025.
70	K.i. Kogyo Ltd. Top agencies Navy (Department of the Navy)	$108,815	<0.1%	Rank history: not on the FY2021–FY2022 lists, #41 in FY2023, not on the FY2024 list and #61 in FY2025; down 12 since Aug 2024–Jul 2025.
71	South Park Township Top agencies HHS (Department of Health and Human Services) DOE (Department of Energy)	$108,265	<0.1%	Rank history: #99 in FY2021, not on the FY2022 list, #95 in FY2023, #87 in FY2024 and not on the FY2025 list; up 32 since Aug 2024–Jul 2025.
72	Rockaway Valley Reg Sewer Auth Top agencies Army (Department of the Army)	$104,421	<0.1%	Rank history: #84 in FY2021, #84 in FY2022, #85 in FY2023, #61 in FY2024 and #69 in FY2025; down 15 since Aug 2024–Jul 2025.
73	City of Jeffersonville Top agencies Commerce (Department of Commerce)	$102,671	<0.1%	Rank history: not on the FY2021 list, #90 in FY2022, not on the FY2023 list, #98 in FY2024 and #76 in FY2025; unchanged since Aug 2024–Jul 2025.
74	Gwendolyn C. Hill Top agencies Army (Department of the Army)	$99,800	<0.1%	Rank history: not on the FY2021 list, #94 in FY2022, #96 in FY2023, #79 in FY2024 and #73 in FY2025; new, not ranked in Aug 2024–Jul 2025.
75	OUU Clean Technology K.K. Top agencies USAF (Department of the Air Force)	$99,068	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
76	Bristol Bay Borough Of Top agencies USAF (Department of the Air Force)	$95,000	<0.1%	Rank history: #98 in FY2021, #93 in FY2022, #94 in FY2023, #76 in FY2024 and #74 in FY2025; down 4 since Aug 2024–Jul 2025.
77	M Davidson & Associates Inc. Top agencies Army (Department of the Army)	$94,800	<0.1%	Rank history: not on the FY2021–FY2022 lists, #99 in FY2023, #77 in FY2024 and #72 in FY2025; down 7 since Aug 2024–Jul 2025.
78	White Mountain Apache Tribe Top agencies HHS (Department of Health and Human Services)	$92,374	<0.1%	Rank history: #86 in FY2021, not on the FY2022–FY2023 lists, #68 in FY2024 and #83 in FY2025; up 6 since Aug 2024–Jul 2025.
79	DC Water & Sewer Authority Top agencies Treasury (Department of the Treasury)	$89,498	<0.1%	Rank history: not on the FY2021–FY2023 lists, #90 in FY2024 and not on the FY2025 list; up 34 since Aug 2024–Jul 2025.
80	City of Watervliet Top agencies Army (Department of the Army)	$87,853	<0.1%	Rank history: not on the FY2021 list, #62 in FY2022, #79 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
81	Schrass GMBH Top agencies USAF (Department of the Air Force)	$87,268	<0.1%	Rank history: #81 in FY2021, #79 in FY2022, #89 in FY2023, #78 in FY2024 and #75 in FY2025; down 12 since Aug 2024–Jul 2025.
82	Ronielle Howard & Associates LLC Top agencies Army (Department of the Army)	$84,664	<0.1%	Rank history: not on the FY2021–FY2023 lists, #84 in FY2024 and #77 in FY2025; down 4 since Aug 2024–Jul 2025.
83	Pro-Pipe, Inc. Top agencies DOI (Department of the Interior)	$80,431	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
84	Agua Pura Services LLC Top agencies DOJ (Department of Justice)	$80,201	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
85	Midwest Environmental Management Services, L.L.C. Top agencies Army (Department of the Army)	$79,700	<0.1%	Rank history: not on the FY2021 list, #95 in FY2022, not on the FY2023 list, #67 in FY2024 and not on the FY2025 list; down 5 since Aug 2024–Jul 2025.
86	Miller Environmental Inc. Top agencies DOI (Department of the Interior)	$79,221	<0.1%	Rank history: not on the FY2021 list, #86 in FY2022, not on the FY2023 list, #86 in FY2024 and #80 in FY2025; down 5 since Aug 2024–Jul 2025.
87	Nabd Alasr Trading and Contracting Company Top agencies DOS (Department of State)	$78,200	<0.1%	Rank history: not on the FY2021–FY2022 lists, #90 in FY2023, #72 in FY2024 and not on the FY2025 list; down 19 since Aug 2024–Jul 2025.
88	Comp Environmental Inc. Top agencies Navy (Department of the Navy)	$72,852	<0.1%	Rank history: not on the FY2021–FY2024 lists and #82 in FY2025; new, not ranked in Aug 2024–Jul 2025.
89	State of Maryland Through Maryland Environmental Service Top agencies Smithsonian (Smithsonian Institution)	$69,223	<0.1%	Rank history: not on the FY2021–FY2024 lists and #43 in FY2025; new, not ranked in Aug 2024–Jul 2025.
90	Thermo Fisher Scientific Inc. Through Thermo Electron North America LLC Top agencies Army (Department of the Army)	$66,941	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
91	Vision Contracting Inc. Top agencies DOI (Department of the Interior)	$64,980	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
92	JWC Environmental Inc. Top agencies DOJ (Department of Justice)	$61,168	<0.1%	Rank history: not on the FY2021–FY2023 lists, #94 in FY2024 and #89 in FY2025; up 10 since Aug 2024–Jul 2025.
93	Kokowski Plumbing LLC Top agencies VA (Department of Veterans Affairs)	$60,000	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
94	Fluid Solutions LLC Top agencies DOS (Department of State)	$59,912	<0.1%	Rank history: not on the FY2021–FY2023 lists, #75 in FY2024 and not on the FY2025 list; down 15 since Aug 2024–Jul 2025.
95	Automation Group Inc. Top agencies Army (Department of the Army)	$59,472	<0.1%	Rank history: not on the FY2021–FY2025 lists; up 21 since Aug 2024–Jul 2025.
96	Environmental Systems Service, Ltd. Top agencies DHS (Department of Homeland Security)	$57,202	<0.1%	Rank history: not on the FY2021–FY2023 lists, #92 in FY2024 and #92 in FY2025; down 2 since Aug 2024–Jul 2025.
97	Chubu Kamikita Seiso Co., Ltd. Top agencies USAF (Department of the Air Force)	$54,152	<0.1%	Rank history: not on the FY2021–FY2025 lists; up 20 since Aug 2024–Jul 2025.
98	Nihon Highway Service Co.,Ltd. Top agencies Army (Department of the Army)	$53,523	<0.1%	Rank history: not on the FY2021–FY2024 lists and #93 in FY2025; new, not ranked in Aug 2024–Jul 2025.
99	Broadbent & Associates, Inc. Top agencies Army (Department of the Army)	$52,800	<0.1%	Rank history: not on the FY2021–FY2023 lists, #93 in FY2024 and #94 in FY2025; down 4 since Aug 2024–Jul 2025.
100	GPC Consolidated Reporting Top agencies USDA (Department of Agriculture)	$51,449	<0.1%	Rank history: not on the FY2021–FY2024 lists and #86 in FY2025; up 19 since Aug 2024–Jul 2025.

Rankings for the codes under NAICS 22132

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 $264 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. 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.
• 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 Aug 2024–Jul 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