Top 100 Contractors in PSC 79: Cleaning Equipment and Supplies, FY2023

Name: Top 100 Contractors in PSC 79: Cleaning Equipment and Supplies, FY2023
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2022 – Sep 30, 2023 Code page on GovTribe

The top 10 won 78% of FY2023 PSC 79 contract dollars

Contract obligations: $103,105,452 Net of deobligations, by contracts coded PSC 79 or a code under it
Contractors: 281 Parent companies with an obligation
Largest contractor: National Industries for the Blind $48.5 million, 45.7% 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	National Industries for the Blind Top agencies GSA (General Services Administration) DLA (Defense Logistics Agency) Navy (Department of the Navy)	$48,462,727	45.7%	Rank history: #1 in FY2021, #1 in FY2022, #1 in FY2024 and #1 in FY2025; unchanged since FY2022.
2	Anatrace Products LLC Top agencies HHS (Department of Health and Human Services)	$9,591,300	9.0%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
3	GMS Industrial Supply, Inc. Top agencies GSA (General Services Administration)	$8,355,603	7.9%	Rank history: #2 in FY2021, #2 in FY2022, #3 in FY2024 and #3 in FY2025; down 1 since FY2022.
4	Mono Machines LLC Top agencies GSA (General Services Administration) Navy (Department of the Navy)	$3,411,772	3.2%	Rank history: not on the FY2021–FY2022 lists, #2 in FY2024 and #2 in FY2025; new.
5	Chesapeake Center Inc 2 awardees Top agencies Navy (Department of the Navy)	$2,594,728	2.4%	Rank history: #35 in FY2021, #8 in FY2022, #10 in FY2024 and #9 in FY2025; up 3 since FY2022.
6	F & M Micro Products Inc. Top agencies GSA (General Services Administration)	$2,510,889	2.4%	Rank history: #10 in FY2021, #3 in FY2022, #5 in FY2024 and #6 in FY2025; down 3 since FY2022.
7	Premier & Companies, Inc. Top agencies GSA (General Services Administration) USAF (Department of the Air Force) VA (Department of Veterans Affairs)	$2,229,053	2.1%	Rank history: #33 in FY2021, #25 in FY2022, #4 in FY2024 and #4 in FY2025; up 18 since FY2022.
8	Giga, Inc. Top agencies GSA (General Services Administration) Army (Department of the Army) DLA (Defense Logistics Agency)	$2,141,224	2.0%	Rank history: #13 in FY2021, #9 in FY2022, #12 in FY2024 and #21 in FY2025; up 1 since FY2022.
9	Federal Contracts LLC Top agencies VA (Department of Veterans Affairs) Army (Department of the Army) USAF (Department of the Air Force)	$1,534,945	1.4%	Rank history: #26 in FY2021, #7 in FY2022, #8 in FY2024 and #18 in FY2025; down 2 since FY2022.
10	Ecolab Inc. 2 awardees, including Ecolab Food Safety Specialties Inc. Top agencies GSA (General Services Administration) Navy (Department of the Navy) VA (Department of Veterans Affairs)	$1,403,141	1.3%	Rank history: #7 in FY2021, #5 in FY2022, #9 in FY2024 and #8 in FY2025; down 5 since FY2022.
11	Aviate Enterprises, Inc. Top agencies VA (Department of Veterans Affairs) Army (Department of the Army) DHS (Department of Homeland Security)	$1,253,449	1.2%	Rank history: #4 in FY2021, #6 in FY2022, #13 in FY2024 and #7 in FY2025; down 5 since FY2022.
12	Downeast Logistics LLC Top agencies DLA (Defense Logistics Agency) USAF (Department of the Air Force) VA (Department of Veterans Affairs)	$1,092,052	1.0%	Rank history: #45 in FY2021, #20 in FY2022, #25 in FY2024 and #50 in FY2025; up 8 since FY2022.
13	Barnes Supply Co, Inc. Top agencies GSA (General Services Administration)	$1,029,161	1.0%	Rank history: #11 in FY2021, #11 in FY2022 and not on the FY2024–FY2025 lists; down 2 since FY2022.
14	Pro Buy Solutions, LLC Top agencies GSA (General Services Administration)	$1,002,653	0.9%	Rank history: #6 in FY2021, #10 in FY2022, #15 in FY2024 and #25 in FY2025; down 4 since FY2022.
15	Rite-Kem, Inc. Top agencies GSA (General Services Administration)	$980,163	0.9%	Rank history: #68 in FY2021, #83 in FY2022, #7 in FY2024 and #5 in FY2025; up 68 since FY2022.
16	Wecsys LLC Top agencies GSA (General Services Administration) HHS (Department of Health and Human Services) DLA (Defense Logistics Agency)	$767,797	0.7%	Rank history: not on the FY2021 list, #68 in FY2022, #11 in FY2024 and #11 in FY2025; up 52 since FY2022.
17	Jankel Tactical Systems LLC Top agencies GSA (General Services Administration)	$504,768	0.5%	Rank history: not on the FY2021–FY2022 lists, #19 in FY2024 and not on the FY2025 list; up 180 since FY2022.
18	Mill Wiping Rags, Inc. Top agencies GSA (General Services Administration)	$472,995	0.4%	Rank history: #16 in FY2021, #21 in FY2022, #16 in FY2024 and #12 in FY2025; up 3 since FY2022.
19	Tennant Company 2 awardees, including Tennant Sales and Service Company Top agencies DECA (Defense Commissary Agency) USAF (Department of the Air Force) DHS (Department of Homeland Security)	$460,067	0.4%	Rank history: #14 in FY2021, #49 in FY2022, #22 in FY2024 and #35 in FY2025; up 30 since FY2022.
20	R.s. Hughes Company, Inc. Top agencies GSA (General Services Administration) Navy (Department of the Navy)	$453,842	0.4%	Rank history: not on the FY2021–FY2022 lists, #85 in FY2024 and not on the FY2025 list; up 87 since FY2022.
21	VWR International LLC Top agencies HHS (Department of Health and Human Services)	$431,000	0.4%	Rank history: #15 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
22	Supply King Usa, LLC Top agencies GSA (General Services Administration)	$420,264	0.4%	Rank history: not on the FY2021–FY2022 lists, #82 in FY2024 and #23 in FY2025; up 195 since FY2022.
23	PPG Industries, Inc. 2 awardees, including Texstars LLC Top agencies GSA (General Services Administration) DLA (Defense Logistics Agency)	$416,157	0.4%	Rank history: #40 in FY2021, #45 in FY2022, #31 in FY2024 and #48 in FY2025; up 22 since FY2022.
24	Morning Star Industries Inc. Top agencies GSA (General Services Administration)	$380,185	0.4%	Rank history: #28 in FY2021, #30 in FY2022, #29 in FY2024 and #15 in FY2025; up 6 since FY2022.
25	Fabrex Unlimited Inc Top agencies GSA (General Services Administration)	$366,822	0.3%	Rank history: not on the FY2021–FY2022 lists, #17 in FY2024 and #14 in FY2025; new.
26	American Sanitary Products Inc. Top agencies DOJ (Department of Justice) VA (Department of Veterans Affairs)	$359,356	0.3%	Rank history: #3 in FY2021, #4 in FY2022, #27 in FY2024 and #38 in FY2025; down 22 since FY2022.
27	W.w. Grainger, Inc. Top agencies USAF (Department of the Air Force) VA (Department of Veterans Affairs) GSA (General Services Administration)	$351,204	0.3%	Rank history: #46 in FY2021, #72 in FY2022, #50 in FY2024 and not on the FY2025 list; up 45 since FY2022.
28	Alfred Karcher GMBH & Co. KG 2 awardees, including Karcher North America Inc. Top agencies VA (Department of Veterans Affairs) USDA (Department of Agriculture) USAF (Department of the Air Force)	$338,365	0.3%	Rank history: #63 in FY2021, #19 in FY2022, #28 in FY2024 and not on the FY2025 list; down 9 since FY2022.
29	Minton Supply Co Top agencies GSA (General Services Administration)	$324,530	0.3%	Rank history: #38 in FY2021, #17 in FY2022, #20 in FY2024 and not on the FY2025 list; down 12 since FY2022.
30	S&Y Trading Corp of New Jersey Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force) GSA (General Services Administration)	$298,585	0.3%	Rank history: #43 in FY2021, #16 in FY2022, #40 in FY2024 and #46 in FY2025; down 14 since FY2022.
31	Diamond Industrial Inc. Top agencies DLA (Defense Logistics Agency)	$275,708	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
32	Benchmark Products, LLC Top agencies HHS (Department of Health and Human Services)	$266,000	0.3%	Rank history: #24 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
33	Leonard Paper Company Top agencies HHS (Department of Health and Human Services)	$240,023	0.2%	Rank history: #51 in FY2021, #32 in FY2022, #62 in FY2024 and #63 in FY2025; down 1 since FY2022.
34	Caprice Electronics, Inc. Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security) VA (Department of Veterans Affairs)	$233,877	0.2%	Rank history: #39 in FY2021, #27 in FY2022, #14 in FY2024 and #10 in FY2025; down 7 since FY2022.
35	Remington Construction LLC Top agencies GSA (General Services Administration)	$232,883	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
36	Dt-Trak Consulting, Inc. Top agencies DOI (Department of the Interior)	$226,398	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
37	Ashtead US Holdings Inc Through Sunbelt Rentals, Inc. Top agencies USAF (Department of the Air Force)	$219,296	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
38	Corporation Logical Top agencies Navy (Department of the Navy)	$195,668	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
39	Bolana Capitol Enterprises, Inc. Top agencies Smithsonian (Smithsonian Institution)	$183,000	0.2%	Rank history: not on the FY2021–FY2022 lists, #78 in FY2024 and not on the FY2025 list; new.
40	The Tomlinson Group, LLC Top agencies DLA (Defense Logistics Agency)	$177,269	0.2%	Rank history: #56 in FY2021, not on the FY2022 list, #49 in FY2024 and #27 in FY2025; returned.
41	Manny Gutterman & Associates Inc Through Jelmar LLC Top agencies VA (Department of Veterans Affairs)	$177,192	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
42	American Material Handling, Inc. Top agencies USAF (Department of the Air Force)	$169,289	0.2%	Rank history: not on the FY2021 list, #71 in FY2022, #21 in FY2024 and not on the FY2025 list; up 29 since FY2022.
43	Jackline, LLC Top agencies VA (Department of Veterans Affairs) DOI (Department of the Interior)	$164,636	0.2%	Rank history: #49 in FY2021, #15 in FY2022 and not on the FY2024–FY2025 lists; down 28 since FY2022.
44	Seznep Inc Top agencies GSA (General Services Administration)	$156,666	0.1%	Rank history: not on the FY2021–FY2022 lists, #42 in FY2024 and #40 in FY2025; new.
45	Alden Equipment, Inc. Top agencies VA (Department of Veterans Affairs)	$148,393	0.1%	Rank history: not on the FY2021–FY2022 lists, #61 in FY2024 and not on the FY2025 list; new.
46	Ezclear LLC Top agencies GSA (General Services Administration)	$145,475	0.1%	Rank history: #61 in FY2021, #24 in FY2022, #30 in FY2024 and #26 in FY2025; down 22 since FY2022.
47	Vernas Ventures LLC 2 awardees, including Alphavets, LLC Top agencies GSA (General Services Administration) MDA (DOD Missile Defense Agency)	$140,454	0.1%	Rank history: #20 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
48	Caldwell Cleaning LLC Top agencies VA (Department of Veterans Affairs) Navy (Department of the Navy) GSA (General Services Administration)	$132,372	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
49	Kelly Computer Supply Company, LLC Top agencies DOI (Department of the Interior)	$131,847	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
50	Tiger-Vac Inc. Top agencies GSA (General Services Administration)	$131,710	0.1%	Rank history: #19 in FY2021, #54 in FY2022, #36 in FY2024 and #53 in FY2025; up 4 since FY2022.
51	Laun-Dry Supply Co Inc. Top agencies HHS (Department of Health and Human Services)	$129,850	0.1%	Rank history: #95 in FY2021, #57 in FY2022, #39 in FY2024 and #39 in FY2025; up 6 since FY2022.
52	Its Simple Logistics LLC Top agencies Army (Department of the Army)	$126,807	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
53	Hydro Engineering Inc. Top agencies DOS (Department of State)	$123,767	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
54	J & N Marketing, Inc. Top agencies DOI (Department of the Interior)	$123,173	0.1%	Rank history: not on the FY2021 list, #65 in FY2022 and not on the FY2024–FY2025 lists; up 11 since FY2022.
55	G.t. Machining & Fabricating Ltd. Top agencies GSA (General Services Administration)	$121,959	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
56	Nanoscience Instruments Inc. Top agencies DOI (Department of the Interior)	$120,797	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
57	Bravo, Inc. Top agencies VA (Department of Veterans Affairs)	$117,369	0.1%	Rank history: #30 in FY2021, #22 in FY2022, #57 in FY2024 and #41 in FY2025; down 35 since FY2022.
58	DLA Aerospace LLC Top agencies DLA (Defense Logistics Agency)	$114,950	0.1%	Rank history: not on the FY2021 list, #59 in FY2022 and not on the FY2024–FY2025 lists; up 1 since FY2022.
59	BTI Chemical Company Inc. Top agencies GSA (General Services Administration)	$114,128	0.1%	Rank history: #50 in FY2021, #52 in FY2022, #43 in FY2024 and #78 in FY2025; down 7 since FY2022.
60	B Med Industrial Supply LLC Top agencies GSA (General Services Administration)	$113,301	0.1%	Rank history: not on the FY2021–FY2022 lists, #32 in FY2024 and not on the FY2025 list; new.
61	Logistics365 Inc. Top agencies GSA (General Services Administration)	$112,114	0.1%	Rank history: not on the FY2021 list, #47 in FY2022 and not on the FY2024–FY2025 lists; down 14 since FY2022.
62	Marathon Industrial Equipment LLC Top agencies USAF (Department of the Air Force) VA (Department of Veterans Affairs)	$99,312	0.1%	Rank history: not on the FY2021 list, #14 in FY2022, #33 in FY2024 and #91 in FY2025; down 48 since FY2022.
63	J & L Hermes Supply LLC Top agencies GSA (General Services Administration)	$96,816	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 47 since FY2022.
64	Lakota Enterprises Inc. Top agencies DOI (Department of the Interior) HHS (Department of Health and Human Services)	$87,558	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
65	Ease Painting and Construction, Inc. Top agencies DHS (Department of Homeland Security)	$86,336	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
66	Divine Imaging Inc. Top agencies GSA (General Services Administration) Smithsonian (Smithsonian Institution) USAF (Department of the Air Force)	$81,220	0.1%	Rank history: not on the FY2021 list, #63 in FY2022, #24 in FY2024 and not on the FY2025 list; down 3 since FY2022.
67	Eagle Safe Surfaces Colorado Inc. Top agencies USAF (Department of the Air Force)	$77,191	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
68	Specialty Coatings, Inc. Top agencies DLA (Defense Logistics Agency)	$75,806	0.1%	Rank history: #87 in FY2021, #80 in FY2022, #63 in FY2024 and #54 in FY2025; up 12 since FY2022.
69	Gadsden Industrial Distributors, Inc. Top agencies Army (Department of the Army)	$71,748	0.1%	Rank history: not on the FY2021 list, #88 in FY2022, #66 in FY2024 and #98 in FY2025; up 19 since FY2022.
70	RKU Distributing, Inc. Top agencies DECA (Defense Commissary Agency)	$70,836	0.1%	Rank history: #98 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 157 since FY2022.
71	Ayisa Investments Top agencies USAID (US Agency for International Development)	$69,394	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
72	Access Products Inc. Top agencies DOI (Department of the Interior)	$62,123	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
73	MBC Products, Inc. Top agencies Treasury (Department of the Treasury)	$60,688	0.1%	Rank history: not on the FY2021–FY2022 lists, #87 in FY2024 and not on the FY2025 list; up 49 since FY2022.
74	Shamrocks Discount Janitors Supply Inc. Top agencies HHS (Department of Health and Human Services)	$60,000	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
75	Adfos LLC Top agencies DECA (Defense Commissary Agency)	$57,900	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
76	Elsco Inc. Top agencies GSA (General Services Administration)	$57,038	0.1%	Rank history: #34 in FY2021, #94 in FY2022, #59 in FY2024 and #100 in FY2025; up 18 since FY2022.
77	Adirondack Electronics Inc. Top agencies Navy (Department of the Navy)	$56,237	0.1%	Rank history: #88 in FY2021, #61 in FY2022, not on the FY2024 list and #96 in FY2025; down 16 since FY2022.
78	Wynn Innovations LLC Top agencies USAF (Department of the Air Force)	$53,052	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
79	The Akana Group Inc. Top agencies DOI (Department of the Interior)	$52,152	<0.1%	Rank history: #22 in FY2021, not on the FY2022 list, #76 in FY2024 and not on the FY2025 list; returned.
80	Clayton Associates Inc. Top agencies GSA (General Services Administration)	$50,188	<0.1%	Rank history: #60 in FY2021, #56 in FY2022, not on the FY2024 list and #88 in FY2025; down 24 since FY2022.
81	Mooweep LLC Top agencies DOI (Department of the Interior)	$49,856	<0.1%	Rank history: not on the FY2021–FY2022 lists, #34 in FY2024 and not on the FY2025 list; new.
82	Statz Corp Top agencies VA (Department of Veterans Affairs)	$49,168	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
83	Hubbard-Hall Inc. Top agencies Army (Department of the Army)	$48,804	<0.1%	Rank history: not on the FY2021–FY2022 lists, #67 in FY2024 and #72 in FY2025; up 48 since FY2022.
84	Aris Chemical & Supply Co Top agencies DOJ (Department of Justice)	$48,106	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
85	JTM Enterprises LLC Top agencies DOI (Department of the Interior)	$47,904	<0.1%	Rank history: #66 in FY2021, #91 in FY2022 and not on the FY2024–FY2025 lists; up 6 since FY2022.
86	One Stop Industries, LLC Top agencies Army (Department of the Army)	$47,499	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
87	Volker Wetzel Wetzel Land- UND Gartentechnik Top agencies USAF (Department of the Air Force)	$47,436	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
88	Gnap LLC Top agencies Army (Department of the Army)	$46,800	<0.1%	Rank history: not on the FY2021–FY2022 lists, #47 in FY2024 and not on the FY2025 list; new.
89	Blue Stone Solutions LLC Top agencies DOI (Department of the Interior)	$44,811	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
90	Bbmc Inc. Top agencies GSA (General Services Administration)	$43,907	<0.1%	Rank history: not on the FY2021–FY2022 lists, #46 in FY2024 and #43 in FY2025; new.
91	Evoqua Water Technologies LLC Top agencies NASA (National Aeronautics and Space Administration)	$43,620	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
92	RC Consolidated Services Inc. Top agencies VA (Department of Veterans Affairs)	$43,280	<0.1%	Rank history: not on the FY2021–FY2022 lists, #97 in FY2024 and #44 in FY2025; new.
93	ERC Acquisition Inc. Top agencies USAF (Department of the Air Force)	$43,000	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
94	Wisecom Technologies Inc. Top agencies USAF (Department of the Air Force)	$41,998	<0.1%	Rank history: #89 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 11 since FY2022.
95	GFS Supply & Services Company, Inc. Top agencies Army (Department of the Army)	$41,688	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 79 since FY2022.
96	Native Green LLC Top agencies GSA (General Services Administration)	$41,558	<0.1%	Rank history: not on the FY2021 list, #69 in FY2022, #60 in FY2024 and #66 in FY2025; down 27 since FY2022.
97	RLH Inc. Top agencies DOI (Department of the Interior)	$41,531	<0.1%	Rank history: #96 in FY2021, #53 in FY2022 and not on the FY2024–FY2025 lists; down 44 since FY2022.
98	Daycon Products Company, Inc. Top agencies Smithsonian (Smithsonian Institution)	$39,852	<0.1%	Rank history: #70 in FY2021, #60 in FY2022 and not on the FY2024–FY2025 lists; down 38 since FY2022.
99	Complete Packaging and Shipping Supplies, Inc. Top agencies GSA (General Services Administration)	$38,967	<0.1%	Rank history: not on the FY2021 list, #35 in FY2022 and not on the FY2024–FY2025 lists; down 64 since FY2022.
100	Superior Supply Ltd Top agencies Smithsonian (Smithsonian Institution)	$38,930	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.

Show 75 more

100 of 281 contractors listed here. See the rest on GovTribe.

Rankings for the codes under PSC 79

Code	Net obligations	Largest contractor
7910 Floor Polishers and Vacuum Cleaning Equipment	$59,013,906	National Industries for the Blind
7930 Cleaning and Polishing Compounds and Preparations	$33,504,110	Anatrace Products LLC
7920 Brooms, Brushes, Mops, and Sponges	$10,587,436	Chesapeake Center Inc

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 $106 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 2023 ran Oct 1, 2022 – Sep 30, 2023. 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 FY2022. "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 FY2022 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.

Quick answers

Who were the top 10 PSC 79 contractors in FY2023?

1. National Industries for the Blind ($48.5M), 2. Anatrace Products LLC ($9.59M), 3. GMS Industrial Supply, Inc. ($8.36M), 4. Mono Machines LLC ($3.41M), 5. Chesapeake Center Inc ($2.59M), 6. F & M Micro Products Inc. ($2.51M), 7. Premier & Companies, Inc. ($2.23M), 8. Giga, Inc. ($2.14M), 9. Federal Contracts LLC ($1.53M), 10. Ecolab Inc. ($1.4M).

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