Top 100 Contractors in NAICS 562991: Septic Tank and Related Services, Aug 2025–Jul 2026

Name: Top 100 Contractors in NAICS 562991: Septic Tank and Related Services, Aug 2025–Jul 2026
Creator: GovTribe
License: https://creativecommons.org/licenses/by/4.0/

Parent companies by net contract obligations Aug 1, 2025 – Jul 31, 2026 Code page on GovTribe

The latest 12 months. See the newest fiscal year's list: Top Contractors in NAICS 562991: Septic Tank and Related Services, FY2025.

The top 10 won 26% of NAICS 562991 contract dollars from August 2025 through July 2026

Contract obligations: $93,039,237 Net of deobligations, by contracts coded NAICS 562991
Contractors: 608 Parent companies with an obligation
Largest contractor: Major Contracting Services, Inc. $4.67 million, 4.6% of obligations
Data as of: Nov 5, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV · Free to reuse with credit to GovTribe (CC BY 4.0)

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Major Contracting Services, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$4,671,886	4.6%	Rank history: #2 in FY2021, #2 in FY2022, #1 in FY2023, #2 in FY2024 and #3 in FY2025; up 2 since Aug 2024–Jul 2025.
2	Ronjon Rentals Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy)	$4,029,416	4.0%	Rank history: #4 in FY2021, #1 in FY2022, #2 in FY2023, #3 in FY2024 and #2 in FY2025; unchanged since Aug 2024–Jul 2025.
3	Suntiff, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) DOI (Department of the Interior)	$3,196,745	3.2%	Rank history: not on the FY2021–FY2023 lists, #13 in FY2024 and #7 in FY2025; up 6 since Aug 2024–Jul 2025.
4	Skookum Educational Programs Top agencies Army (Department of the Army) DHA (Defense Health Agency)	$2,523,231	2.5%	Rank history: #10 in FY2021, #8 in FY2022, #10 in FY2023, #10 in FY2024 and #8 in FY2025; up 4 since Aug 2024–Jul 2025.
5	K&H Environmental Services, LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$2,254,716	2.2%	Rank history: not on the FY2021–FY2022 lists, #56 in FY2023, #63 in FY2024 and #13 in FY2025; up 16 since Aug 2024–Jul 2025.
6	Amerivet Contracting Top agencies USDA (Department of Agriculture)	$2,144,826	2.1%	Rank history: not on the FY2021–FY2023 lists, #1 in FY2024 and #1 in FY2025; down 5 since Aug 2024–Jul 2025.
7	Ronjon Rentals Vantex Service Joint Venture Top agencies Navy (Department of the Navy)	$1,952,997	1.9%	Rank history: #5 in FY2021, #5 in FY2022, #6 in FY2023, #7 in FY2024 and #9 in FY2025; up 3 since Aug 2024–Jul 2025.
8	RLA Holdings, Inc. Top agencies USDA (Department of Agriculture)	$1,891,200	1.9%	Rank history: not on the FY2021 list, #30 in FY2022, not on the FY2023–FY2024 lists and #44 in FY2025; up 40 since Aug 2024–Jul 2025.
9	Krätz GMBH Top agencies Army (Department of the Army)	$1,853,303	1.8%	Rank history: not on the FY2021–FY2022 lists, #5 in FY2023, #4 in FY2024 and #6 in FY2025; down 4 since Aug 2024–Jul 2025.
10	Future Services General Trading & Contracting Co. Top agencies USAF (Department of the Air Force)	$1,751,090	1.7%	Rank history: not on the FY2021–FY2022 lists, #7 in FY2023, #9 in FY2024 and #11 in FY2025; up 3 since Aug 2024–Jul 2025.
11	Oregon Portable Toilets LLC Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$1,643,414	1.6%	Rank history: not on the FY2021–FY2024 lists and #21 in FY2025; up 138 since Aug 2024–Jul 2025.
12	Vantex Service Corporation Top agencies Army (Department of the Army)	$1,620,651	1.6%	Rank history: #3 in FY2021, #4 in FY2022, #3 in FY2023, #6 in FY2024 and #5 in FY2025; down 5 since Aug 2024–Jul 2025.
13	Triangle Solutions, LLC Top agencies Navy (Department of the Navy)	$1,384,937	1.4%	Rank history: not on the FY2021–FY2024 lists and #98 in FY2025; new, not ranked in Aug 2024–Jul 2025.
14	Emergency Support Services, LLC Top agencies USDA (Department of Agriculture)	$1,352,964	1.3%	Rank history: not on the FY2021–FY2022 lists, #34 in FY2023, #35 in FY2024 and #23 in FY2025; up 21 since Aug 2024–Jul 2025.
15	Sani-Can, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) DOI (Department of the Interior)	$1,243,438	1.2%	Rank history: #29 in FY2021, #23 in FY2022, #11 in FY2023, #23 in FY2024 and #34 in FY2025; up 19 since Aug 2024–Jul 2025.
16	Mayes Septic & Port A Pots, LLC Top agencies DOI (Department of the Interior)	$1,166,007	1.2%	Rank history: not on the FY2021–FY2022 lists, #46 in FY2023, #41 in FY2024 and #40 in FY2025; up 41 since Aug 2024–Jul 2025.
17	Butt Hut, Inc. Top agencies USDA (Department of Agriculture)	$1,145,196	1.1%	Rank history: not on the FY2021–FY2023 lists, #77 in FY2024 and #12 in FY2025; up 9 since Aug 2024–Jul 2025.
18	W W Pumping Service Top agencies USDA (Department of Agriculture)	$1,103,094	1.1%	Rank history: not on the FY2021 list, #71 in FY2022, not on the FY2023 list, #15 in FY2024 and #51 in FY2025; up 262 since Aug 2024–Jul 2025.
19	Cumberland Septic Services Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) DHS (Department of Homeland Security)	$1,097,066	1.1%	Rank history: #51 in FY2021, #43 in FY2022, #41 in FY2023, #39 in FY2024 and #45 in FY2025; up 21 since Aug 2024–Jul 2025.
20	310 Dust Control LLC Top agencies USDA (Department of Agriculture)	$1,045,724	1.0%	Rank history: not on the FY2021–FY2023 lists, #8 in FY2024 and #4 in FY2025; down 16 since Aug 2024–Jul 2025.
21	Hawaii Johns Inc. Top agencies Army (Department of the Army)	$1,016,758	1.0%	Rank history: #23 in FY2021, #44 in FY2022, #23 in FY2023, #11 in FY2024 and #28 in FY2025; down 1 since Aug 2024–Jul 2025.
22	Wabash Consultants, LLC Top agencies Army (Department of the Army) DOS (Department of State) USAF (Department of the Air Force)	$998,220	1.0%	Rank history: not on the FY2021–FY2023 lists, #21 in FY2024 and #15 in FY2025; down 8 since Aug 2024–Jul 2025.
23	Pine Rim Enterprises Inc. Top agencies USDA (Department of Agriculture)	$987,122	1.0%	Rank history: not on the FY2021–FY2022 lists, #64 in FY2023, #58 in FY2024 and #22 in FY2025; down 1 since Aug 2024–Jul 2025.
24	E & D Enterprises Inc. Top agencies Army (Department of the Army)	$936,403	0.9%	Rank history: #27 in FY2021, #45 in FY2022, #25 in FY2023, #25 in FY2024 and #29 in FY2025; up 3 since Aug 2024–Jul 2025.
25	Architectural House Est. for Contracting Top agencies USAF (Department of the Air Force)	$855,182	0.9%	Rank history: #30 in FY2021, #12 in FY2022, #21 in FY2023, #26 in FY2024 and #25 in FY2025; down 1 since Aug 2024–Jul 2025.
26	Ranch Country Portable Toliets LLC Top agencies USDA (Department of Agriculture)	$854,411	0.8%	Rank history: not on the FY2021–FY2023 lists, #59 in FY2024 and #14 in FY2025; up 3 since Aug 2024–Jul 2025.
27	P.u. Septic Service, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army)	$841,260	0.8%	Rank history: #12 in FY2021, #15 in FY2022, #9 in FY2023, #14 in FY2024 and #16 in FY2025; down 10 since Aug 2024–Jul 2025.
28	Toou Development Co., Ltd Top agencies Army (Department of the Army)	$791,080	0.8%	Rank history: #19 in FY2021, #20 in FY2022, #15 in FY2023, #24 in FY2024 and #19 in FY2025; down 12 since Aug 2024–Jul 2025.
29	Tex-San Site Service LLC Top agencies USAF (Department of the Air Force)	$763,359	0.8%	Rank history: not on the FY2021–FY2022 lists, #19 in FY2023, #22 in FY2024 and #32 in FY2025; up 3 since Aug 2024–Jul 2025.
30	VIP Sanitation, Inc. Top agencies Army (Department of the Army)	$722,358	0.7%	Rank history: #18 in FY2021, #6 in FY2022, not on the FY2023 list, #19 in FY2024 and #77 in FY2025; down 7 since Aug 2024–Jul 2025.
31	Tammy's Alliance, LLC Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$693,399	0.7%	Rank history: not on the FY2021–FY2022 lists, #26 in FY2023, #65 in FY2024 and #38 in FY2025; up 20 since Aug 2024–Jul 2025.
32	4K Sanitation LLC Top agencies Navy (Department of the Navy)	$678,744	0.7%	Rank history: not on the FY2021 list, #24 in FY2022, #40 in FY2023, #40 in FY2024 and #48 in FY2025; up 28 since Aug 2024–Jul 2025.
33	TNT Waste Service LLC Top agencies DOI (Department of the Interior) USDA (Department of Agriculture)	$669,560	0.7%	Rank history: not on the FY2021–FY2022 lists, #86 in FY2023, not on the FY2024 list and #93 in FY2025; up 78 since Aug 2024–Jul 2025.
34	Critical Contingency Solutions LLC Top agencies Army (Department of the Army)	$633,500	0.6%	Rank history: #46 in FY2021, #36 in FY2022, #13 in FY2023, #16 in FY2024 and #17 in FY2025; down 19 since Aug 2024–Jul 2025.
35	DAE IL Sanitary Public Corporation Top agencies Army (Department of the Army)	$631,015	0.6%	Rank history: #65 in FY2021, #55 in FY2022, #49 in FY2023, #80 in FY2024 and #63 in FY2025; up 31 since Aug 2024–Jul 2025.
36	Ohio General Contracting LLC Top agencies USAF (Department of the Air Force)	$570,991	0.6%	Rank history: not on the FY2021–FY2022 lists, #32 in FY2023 and not on the FY2024–FY2025 lists; up 228 since Aug 2024–Jul 2025.
37	Bob Drayton Inc. Top agencies USAF (Department of the Air Force)	$553,815	0.6%	Rank history: #26 in FY2021, #22 in FY2022, #27 in FY2023, #27 in FY2024 and #35 in FY2025; down 6 since Aug 2024–Jul 2025.
38	Valley Septic Service, L.L.C. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$546,970	0.5%	Rank history: not on the FY2021–FY2024 lists and #74 in FY2025; up 350 since Aug 2024–Jul 2025.
39	Okinawaken Sangyo Haikibutsushori Cooperative Association Top agencies USAF (Department of the Air Force)	$545,550	0.5%	Rank history: #57 in FY2021, #37 in FY2022, #35 in FY2023, #57 in FY2024 and #53 in FY2025; up 8 since Aug 2024–Jul 2025.
40	Muhan Co., Ltd Top agencies Army (Department of the Army)	$507,352	0.5%	Rank history: not on the FY2021–FY2024 lists and #83 in FY2025; up 84 since Aug 2024–Jul 2025.
41	Big Bobs Porta Pottys Inc. Top agencies Army (Department of the Army)	$476,797	0.5%	Rank history: not on the FY2021–FY2023 lists, #56 in FY2024 and #50 in FY2025; up 28 since Aug 2024–Jul 2025.
42	Stricklan Enterprises, Inc. Top agencies Army (Department of the Army)	$459,976	0.5%	Rank history: not on the FY2021–FY2023 lists, #42 in FY2024 and #49 in FY2025; up 3 since Aug 2024–Jul 2025.
43	Waste and Water Logistics, LLC Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$459,103	0.5%	Rank history: #93 in FY2021, #60 in FY2022, #70 in FY2023, #34 in FY2024 and #39 in FY2025; up 7 since Aug 2024–Jul 2025.
44	Mariposa Portable Santitation LLC Top agencies DOI (Department of the Interior)	$425,241	0.4%	Rank history: #56 in FY2021, #35 in FY2022, #30 in FY2023, #45 in FY2024 and #56 in FY2025; up 8 since Aug 2024–Jul 2025.
45	Ben Lujan Towing, Inc. Top agencies USAF (Department of the Air Force)	$422,322	0.4%	Rank history: not on the FY2021–FY2022 lists, #53 in FY2023, #55 in FY2024 and #60 in FY2025; up 18 since Aug 2024–Jul 2025.
46	Jon's Johns, LLC Top agencies USDA (Department of Agriculture)	$405,135	0.4%	Rank history: not on the FY2021–FY2025 lists; up 171 since Aug 2024–Jul 2025.
47	South P.r. Aeroservice, Inc. Top agencies Navy (Department of the Navy)	$402,546	0.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
48	Atteberry Portable Toilets & Septic, LLC Top agencies USDA (Department of Agriculture)	$398,875	0.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
49	King's Thrones & Pumping Service L.L.C. Top agencies USDA (Department of Agriculture) Army (Department of the Army)	$388,787	0.4%	Rank history: not on the FY2021 list, #96 in FY2022, not on the FY2023–FY2024 lists and #30 in FY2025; down 10 since Aug 2024–Jul 2025.
50	Kankyo Seibi Co.,Ltd. Top agencies Navy (Department of the Navy)	$387,159	0.4%	Rank history: not on the FY2021–FY2023 lists, #95 in FY2024 and #80 in FY2025; up 35 since Aug 2024–Jul 2025.
51	Nazareth Trading and Equipment Rental Services Top agencies USAF (Department of the Air Force)	$386,209	0.4%	Rank history: not on the FY2021–FY2025 lists; up 74 since Aug 2024–Jul 2025.
52	KDS Services LLC Top agencies USDA (Department of Agriculture)	$386,093	0.4%	Rank history: not on the FY2021–FY2024 lists and #55 in FY2025; up 42 since Aug 2024–Jul 2025.
53	Lunar Holdings LLC Top agencies DOI (Department of the Interior) Navy (Department of the Navy) USDA (Department of Agriculture)	$379,518	0.4%	Rank history: not on the FY2021–FY2024 lists and #76 in FY2025; up 66 since Aug 2024–Jul 2025.
54	Humphreys Enterprises Inc. Top agencies USDA (Department of Agriculture) DHS (Department of Homeland Security)	$372,404	0.4%	Rank history: not on the FY2021–FY2025 lists; up 69 since Aug 2024–Jul 2025.
55	Acome Construction Inc. Top agencies HHS (Department of Health and Human Services)	$371,360	0.4%	Rank history: not on the FY2021–FY2023 lists, #37 in FY2024 and not on the FY2025 list; up 20 since Aug 2024–Jul 2025.
56	Superior Sanitation, LLC Top agencies USDA (Department of Agriculture)	$370,406	0.4%	Rank history: not on the FY2021 list, #66 in FY2022, #95 in FY2023, #52 in FY2024 and #64 in FY2025; up 51 since Aug 2024–Jul 2025.
57	On the Go Services Inc. Top agencies USDA (Department of Agriculture)	$368,896	0.4%	Rank history: not on the FY2021–FY2024 lists and #70 in FY2025; up 19 since Aug 2024–Jul 2025.
58	Unity Global Trading LLC Top agencies Army (Department of the Army)	$353,063	0.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
59	TOI TOI & Dixi Sanitaersysteme GMBH 2 awardees, including Meps GMBH Top agencies USAF (Department of the Air Force) DECA (Defense Commissary Agency) Army (Department of the Army)	$350,704	0.3%	Rank history: not on the FY2021–FY2023 lists, #62 in FY2024 and not on the FY2025 list; up 100 since Aug 2024–Jul 2025.
60	Sierra Sanitation, Inc. Top agencies Army (Department of the Army) USDA (Department of Agriculture)	$341,592	0.3%	Rank history: not on the FY2021 list, #83 in FY2022, #74 in FY2023, #99 in FY2024 and #73 in FY2025; up 22 since Aug 2024–Jul 2025.
61	Two-TAC LLC Top agencies Navy (Department of the Navy) DOI (Department of the Interior) Army (Department of the Army)	$341,189	0.3%	Rank history: not on the FY2021–FY2023 lists, #38 in FY2024 and #10 in FY2025; down 50 since Aug 2024–Jul 2025.
62	Mccracken Portable Toilets & Septic LLC Top agencies Army (Department of the Army)	$340,990	0.3%	Rank history: not on the FY2021–FY2023 lists, #68 in FY2024 and #66 in FY2025; up 17 since Aug 2024–Jul 2025.
63	Royal Flush Septic, LLC Top agencies DOI (Department of the Interior)	$339,864	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
64	Mondak Portables LLC Top agencies USAF (Department of the Air Force) DOI (Department of the Interior)	$335,422	0.3%	Rank history: #41 in FY2021, #54 in FY2022, #28 in FY2023, #28 in FY2024 and #69 in FY2025; up 8 since Aug 2024–Jul 2025.
65	Rent-A-Can Toilet Co., Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) OSD (Office of the Secretary of Defense)	$331,571	0.3%	Rank history: #94 in FY2021 and not on the FY2022–FY2025 lists; up 79 since Aug 2024–Jul 2025.
66	Foster Facilities, Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$303,546	0.3%	Rank history: not on the FY2021–FY2023 lists, #17 in FY2024 and not on the FY2025 list; down 13 since Aug 2024–Jul 2025.
67	Austin Logistics LLC Top agencies USDA (Department of Agriculture) USAF (Department of the Air Force) Navy (Department of the Navy)	$300,370	0.3%	Rank history: not on the FY2021–FY2024 lists and #95 in FY2025; up 74 since Aug 2024–Jul 2025.
68	S365 Inc. Top agencies USDA (Department of Agriculture) Army (Department of the Army) DHS (Department of Homeland Security)	$297,668	0.3%	Rank history: not on the FY2021–FY2025 lists; up 153 since Aug 2024–Jul 2025.
69	Big Valley Sanitation Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior) DOE (Department of Energy)	$292,277	0.3%	Rank history: #96 in FY2021, #42 in FY2022, #17 in FY2023, not on the FY2024 list and #54 in FY2025; up 1 since Aug 2024–Jul 2025.
70	Pina Sajje Sanitation LLC Top agencies Army (Department of the Army)	$291,600	0.3%	Rank history: not on the FY2021–FY2023 lists, #97 in FY2024 and not on the FY2025 list; up 69 since Aug 2024–Jul 2025.
71	Provizion LLC Top agencies DOI (Department of the Interior) USDA (Department of Agriculture)	$285,548	0.3%	Rank history: not on the FY2021–FY2023 lists, #96 in FY2024 and not on the FY2025 list; up 74 since Aug 2024–Jul 2025.
72	Kington Deluxe Toilet Hire SW Ltd Top agencies USAF (Department of the Air Force)	$274,647	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
73	Brave Eagle Corp Top agencies USDA (Department of Agriculture)	$269,560	0.3%	Rank history: not on the FY2021–FY2024 lists and #62 in FY2025; up 43 since Aug 2024–Jul 2025.
74	Yorkshire Industries LLC Top agencies DOI (Department of the Interior)	$269,293	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
75	Gulf Pioneer Company L.L.C. Top agencies USAF (Department of the Air Force)	$265,825	0.3%	Rank history: not on the FY2021–FY2023 lists, #49 in FY2024 and #43 in FY2025; down 32 since Aug 2024–Jul 2025.
76	Southern Colorado Services & Recycling LLC Top agencies USDA (Department of Agriculture)	$261,094	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
77	Ecology Mir Group LLC Top agencies Army (Department of the Army) DOJ (Department of Justice) DHS (Department of Homeland Security)	$259,907	0.3%	Rank history: #70 in FY2021, #69 in FY2022, #31 in FY2023, #53 in FY2024 and not on the FY2025 list; up 56 since Aug 2024–Jul 2025.
78	A & G Pumping, Inc. Top agencies DOI (Department of the Interior) Army (Department of the Army)	$249,025	0.2%	Rank history: not on the FY2021 list, #56 in FY2022 and not on the FY2023–FY2025 lists; up 75 since Aug 2024–Jul 2025.
79	Portable Toilets LLC Top agencies Army (Department of the Army) USDA (Department of Agriculture)	$246,231	0.2%	Rank history: #91 in FY2021, #85 in FY2022, not on the FY2023 list, #86 in FY2024 and not on the FY2025 list; up 102 since Aug 2024–Jul 2025.
80	Krsos LLC Top agencies USAF (Department of the Air Force)	$245,697	0.2%	Rank history: not on the FY2021–FY2022 lists, #79 in FY2023, #85 in FY2024 and #86 in FY2025; up 8 since Aug 2024–Jul 2025.
81	Walters Services Inc. Top agencies Army (Department of the Army) EOP (Executive Office of the President)	$243,750	0.2%	Rank history: not on the FY2021 list, #98 in FY2022, #88 in FY2023, #75 in FY2024 and not on the FY2025 list; down 3 since Aug 2024–Jul 2025.
82	Redorange LLC Top agencies Navy (Department of the Navy) VA (Department of Veterans Affairs)	$238,910	0.2%	Rank history: not on the FY2021–FY2022 lists, #92 in FY2023, #67 in FY2024 and #87 in FY2025; up 27 since Aug 2024–Jul 2025.
83	Dbnc Technologies LLC Top agencies Army (Department of the Army)	$237,990	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
84	Weidner Enterprises, Inc. Top agencies Army (Department of the Army)	$235,975	0.2%	Rank history: #48 in FY2021, #26 in FY2022, not on the FY2023 list, #30 in FY2024 and #37 in FY2025; down 54 since Aug 2024–Jul 2025.
85	Envirosmart, LLC Top agencies USAF (Department of the Air Force)	$233,200	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
86	Hanson Services LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$232,775	0.2%	Rank history: not on the FY2021–FY2022 lists, #90 in FY2023, not on the FY2024 list and #90 in FY2025; up 6 since Aug 2024–Jul 2025.
87	LNZ Enterprises LLC Top agencies USDA (Department of Agriculture) Army (Department of the Army) Navy (Department of the Navy)	$227,212	0.2%	Rank history: not on the FY2021–FY2023 lists, #33 in FY2024 and not on the FY2025 list; down 10 since Aug 2024–Jul 2025.
88	Good Man Inc. Top agencies USDA (Department of Agriculture)	$225,887	0.2%	Rank history: not on the FY2021–FY2024 lists and #75 in FY2025; up 137 since Aug 2024–Jul 2025.
89	Little Johns Portables & Septic Service LLC Top agencies USDA (Department of Agriculture)	$225,707	0.2%	Rank history: not on the FY2021–FY2024 lists and #100 in FY2025; new, not ranked in Aug 2024–Jul 2025.
90	Sim Sanitation Inc. Top agencies USAF (Department of the Air Force)	$223,030	0.2%	Rank history: not on the FY2021–FY2025 lists; up 37 since Aug 2024–Jul 2025.
91	Express Relief Services, Inc. Top agencies Army (Department of the Army)	$221,351	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
92	B & B Portables, LLC Top agencies DOI (Department of the Interior) USDA (Department of Agriculture)	$220,780	0.2%	Rank history: not on the FY2021–FY2024 lists and #36 in FY2025; down 59 since Aug 2024–Jul 2025.
93	Crouch Septic Service & Construction, L.L.C. Top agencies USDA (Department of Agriculture)	$217,703	0.2%	Rank history: not on the FY2021–FY2025 lists; up 55 since Aug 2024–Jul 2025.
94	Bills Sewer & Drain Service Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$214,400	0.2%	Rank history: not on the FY2021–FY2025 lists; up 90 since Aug 2024–Jul 2025.
95	Gleaming Services LLC Top agencies Army (Department of the Army) DOI (Department of the Interior) USAF (Department of the Air Force)	$214,340	0.2%	Rank history: not on the FY2021–FY2025 lists; up 275 since Aug 2024–Jul 2025.
96	Alpha Site Services, LLC Top agencies USDA (Department of Agriculture)	$212,301	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
97	Samchong Corporation Top agencies USAF (Department of the Air Force)	$209,004	0.2%	Rank history: #80 in FY2021, #94 in FY2022, not on the FY2023–FY2024 lists and #99 in FY2025; down 23 since Aug 2024–Jul 2025.
98	Baygreen, Inc. Top agencies Army (Department of the Army)	$208,499	0.2%	Rank history: #100 in FY2021 and not on the FY2022–FY2025 lists; up 30 since Aug 2024–Jul 2025.
99	Blue Sky Enterprises, Inc. Top agencies USDA (Department of Agriculture)	$200,193	0.2%	Rank history: not on the FY2021–FY2025 lists; up 166 since Aug 2024–Jul 2025.
100	Bonds Septic and Portable Toilets, LLC Top agencies Army (Department of the Army)	$194,230	0.2%	Rank history: not on the FY2021 list, #70 in FY2022 and not on the FY2023–FY2025 lists; up 31 since Aug 2024–Jul 2025.

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100 of 608 contractors listed here. See the rest on GovTribe.

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 $101 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

Who were the top 10 NAICS 562991 contractors in Aug 2025–Jul 2026?

1. Major Contracting Services, Inc. ($4.67M), 2. Ronjon Rentals Inc. ($4.03M), 3. Suntiff, LLC ($3.2M), 4. Skookum Educational Programs ($2.52M), 5. K&H Environmental Services, LLC ($2.25M), 6. Amerivet Contracting ($2.14M), 7. Ronjon Rentals Vantex Service Joint Venture ($1.95M), 8. RLA Holdings, Inc. ($1.89M), 9. Krätz GMBH ($1.85M), 10. Future Services General Trading & Contracting Co. ($1.75M).

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