Top 100 Contractors in PSC Z1LB: Maintenance of Highways/Roads/Streets/Bridges/Railways, Jul 2025–Jun 2026

Name: Top 100 Contractors in PSC Z1LB: Maintenance of Highways/Roads/Streets/Bridges/Railways, Jul 2025–Jun 2026
Creator: GovTribe

Parent companies by net contract obligations Jul 1, 2025 – Jun 30, 2026 Code page on GovTribe

The top 10 won 48% of PSC Z1LB contract dollars from July 2025 through June 2026

Contract obligations: $276,653,887 Net of deobligations, by contracts coded PSC Z1LB
Contractors: 260 Parent companies with an obligation
Largest contractor: Koman Construction, LLC $22.3 million, 7.7% 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	Koman Construction, LLC Top agencies DHS (Department of Homeland Security)	$22,278,504	7.7%	Rank history: not on the FY2021 list, #4 in FY2022, not on the FY2023 list, #5 in FY2024 and #1 in FY2025; up 5 since Jul 2024–Jun 2025.
2	Tactical Infrastructure Maintenance Solutions LLC Top agencies DHS (Department of Homeland Security)	$19,285,586	6.7%	Rank history: #2 in FY2021, #1 in FY2022, #2 in FY2023, #2 in FY2024 and #2 in FY2025; down 1 since Jul 2024–Jun 2025.
3	Union Paving & Construction Co Top agencies Navy (Department of the Navy)	$17,154,700	5.9%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
4	Mckenzie Construction & Site Development LLC 2 awardees Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$16,471,604	5.7%	Rank history: not on the FY2021–FY2024 lists and #7 in FY2025; up 22 since Jul 2024–Jun 2025.
5	RBA Engineering International, PLLC Top agencies DOI (Department of the Interior)	$16,197,004	5.6%	Rank history: not on the FY2021–FY2024 lists and #3 in FY2025; new, not ranked in Jul 2024–Jun 2025.
6	Columbus Barricades, Inc. Top agencies Army (Department of the Army)	$13,139,349	4.6%	Rank history: #4 in FY2021, #2 in FY2022, #4 in FY2023, #8 in FY2024 and #6 in FY2025; down 2 since Jul 2024–Jun 2025.
7	Port Madison Construction Corporation Top agencies Navy (Department of the Navy)	$12,422,296	4.3%	Rank history: not on the FY2021–FY2024 lists and #4 in FY2025; up 200 since Jul 2024–Jun 2025.
8	NH1 JV Top agencies Army (Department of the Army)	$7,558,232	2.6%	Rank history: not on the FY2021–FY2022 lists, #1 in FY2023, #26 in FY2024 and not on the FY2025 list; up 145 since Jul 2024–Jun 2025.
9	Judd Buick Construction Inc. Top agencies USDA (Department of Agriculture)	$7,012,602	2.4%	Rank history: not on the FY2021–FY2022 lists, #32 in FY2023, #16 in FY2024 and #17 in FY2025; up 13 since Jul 2024–Jun 2025.
10	Teamgov, Inc. Top agencies Army (Department of the Army)	$6,736,855	2.3%	Rank history: not on the FY2021 list, #43 in FY2022, #42 in FY2023, not on the FY2024 list and #8 in FY2025; new, not ranked in Jul 2024–Jun 2025.
11	Perimeter Security Partners, LP Top agencies Army (Department of the Army)	$4,691,927	1.6%	Rank history: #14 in FY2021, #20 in FY2022, #31 in FY2023, #13 in FY2024 and #12 in FY2025; down 4 since Jul 2024–Jun 2025.
12	Atlantic Pacific Standard LLC Top agencies USDA (Department of Agriculture)	$4,598,338	1.6%	Rank history: not on the FY2021–FY2024 lists and #14 in FY2025; new, not ranked in Jul 2024–Jun 2025.
13	Arctic Slope Regional Corporation 2 awardees, including Asrc Earthworks, LLC and FDT Water Infrastructure, LLC Top agencies USAF (Department of the Air Force) DHS (Department of Homeland Security)	$4,406,637	1.5%	Rank history: not on the FY2021–FY2024 lists and #13 in FY2025; up 75 since Jul 2024–Jun 2025.
14	Armitage SAI JV Top agencies Navy (Department of the Navy)	$4,287,973	1.5%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
15	Accord Federal Services, LLC Top agencies DOE (Department of Energy)	$3,861,802	1.3%	Rank history: not on the FY2021–FY2023 lists, #21 in FY2024 and #16 in FY2025; up 12 since Jul 2024–Jun 2025.
16	Olgoonik Enterprises, LLC Top agencies Army (Department of the Army)	$3,247,368	1.1%	Rank history: not on the FY2021–FY2022 lists, #63 in FY2023, #59 in FY2024 and #84 in FY2025; up 61 since Jul 2024–Jun 2025.
17	Ma-Chis-Wb JV LLC Top agencies Army (Department of the Army)	$2,903,703	1.0%	Rank history: not on the FY2021–FY2024 lists and #26 in FY2025; new, not ranked in Jul 2024–Jun 2025.
18	Creative Builds Corporation Top agencies GSA (General Services Administration)	$2,852,470	1.0%	Rank history: not on the FY2021–FY2023 lists, #11 in FY2024 and #10 in FY2025; down 1 since Jul 2024–Jun 2025.
19	Mccalls Grading & Construction Inc. Top agencies USDA (Department of Agriculture)	$2,838,085	1.0%	Rank history: not on the FY2021–FY2024 lists and #64 in FY2025; up 85 since Jul 2024–Jun 2025.
20	Bryant's Land and Development Industries, Inc. Top agencies USDA (Department of Agriculture)	$2,821,082	1.0%	Rank history: not on the FY2021–FY2025 lists; up 88 since Jul 2024–Jun 2025.
21	W-T Joint Venture Top agencies Army (Department of the Army)	$2,789,538	1.0%	Rank history: not on the FY2021 list, #78 in FY2022, not on the FY2023–FY2024 lists and #20 in FY2025; new, not ranked in Jul 2024–Jun 2025.
22	Vanreenen Construction Co Top agencies USDA (Department of Agriculture)	$2,583,486	0.9%	Rank history: not on the FY2021–FY2022 lists, #94 in FY2023, #46 in FY2024 and not on the FY2025 list; up 41 since Jul 2024–Jun 2025.
23	Jackson Excavation Inc. Top agencies DOI (Department of the Interior)	$2,519,355	0.9%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
24	Alltrack, Inc. Top agencies Army (Department of the Army)	$2,410,037	0.8%	Rank history: not on the FY2021 list, #60 in FY2022, #19 in FY2023, #12 in FY2024 and #19 in FY2025; down 12 since Jul 2024–Jun 2025.
25	C.w. Roberts Contracting, Incorporated Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$2,360,821	0.8%	Rank history: not on the FY2021–FY2024 lists and #24 in FY2025; new, not ranked in Jul 2024–Jun 2025.
26	Pure Enviro-Management, LLC Top agencies USAF (Department of the Air Force)	$2,352,070	0.8%	Rank history: not on the FY2021–FY2024 lists and #22 in FY2025; new, not ranked in Jul 2024–Jun 2025.
27	Blytheco Construction LLC Top agencies USDA (Department of Agriculture)	$2,256,589	0.8%	Rank history: not on the FY2021–FY2024 lists and #36 in FY2025; up 29 since Jul 2024–Jun 2025.
28	Black Diamond Designs, Inc. Top agencies USDA (Department of Agriculture)	$2,231,671	0.8%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
29	JAL Construction, Inc. Top agencies USDA (Department of Agriculture)	$2,192,920	0.8%	Rank history: not on the FY2021–FY2024 lists and #30 in FY2025; new, not ranked in Jul 2024–Jun 2025.
30	Aaecon General Contracting LLC Top agencies USDA (Department of Agriculture)	$2,166,581	0.8%	Rank history: not on the FY2021–FY2024 lists and #23 in FY2025; new, not ranked in Jul 2024–Jun 2025.
31	PCI Support Services LLC Top agencies USDA (Department of Agriculture)	$2,139,359	0.7%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
32	BCI Construction Usa, Inc. Top agencies Army (Department of the Army)	$1,970,592	0.7%	Rank history: not on the FY2021–FY2022 lists, #9 in FY2023, not on the FY2024 list and #15 in FY2025; down 8 since Jul 2024–Jun 2025.
33	Veterans Northwest Construction LLC Top agencies Navy (Department of the Navy)	$1,920,908	0.7%	Rank history: not on the FY2021–FY2022 lists, #8 in FY2023, not on the FY2024 list and #28 in FY2025; new, not ranked in Jul 2024–Jun 2025.
34	Terra Site Constructors LLC Top agencies DHS (Department of Homeland Security)	$1,846,842	0.6%	Rank history: not on the FY2021–FY2023 lists, #48 in FY2024 and not on the FY2025 list; up 30 since Jul 2024–Jun 2025.
35	Price Contracting Inc. Top agencies USDA (Department of Agriculture)	$1,793,559	0.6%	Rank history: #52 in FY2021, #13 in FY2022, #12 in FY2023, #6 in FY2024 and #32 in FY2025; down 14 since Jul 2024–Jun 2025.
36	East Coast Landscaping & Construction Inc. Top agencies Navy (Department of the Navy)	$1,774,978	0.6%	Rank history: not on the FY2021 list, #79 in FY2022, not on the FY2023 list, #37 in FY2024 and #31 in FY2025; up 58 since Jul 2024–Jun 2025.
37	Sky Blue Builders LLC Through Sky Blue RME JV LLC Top agencies Army (Department of the Army)	$1,770,234	0.6%	Rank history: not on the FY2021–FY2025 lists; up 115 since Jul 2024–Jun 2025.
38	Sierra Northern Railway Top agencies Army (Department of the Army)	$1,695,022	0.6%	Rank history: not on the FY2021–FY2024 lists and #43 in FY2025; up 5 since Jul 2024–Jun 2025.
39	Tag Contracting, Inc. Top agencies USDA (Department of Agriculture)	$1,579,132	0.5%	Rank history: not on the FY2021–FY2024 lists and #56 in FY2025; new, not ranked in Jul 2024–Jun 2025.
40	Schulte Construction, Inc. Top agencies Army (Department of the Army)	$1,577,478	0.5%	Rank history: #95 in FY2021, not on the FY2022 list, #91 in FY2023, not on the FY2024 list and #33 in FY2025; up 70 since Jul 2024–Jun 2025.
41	Tipton-Fsi JV II, LLC Top agencies USDA (Department of Agriculture)	$1,503,528	0.5%	Rank history: not on the FY2021–FY2022 lists, #26 in FY2023, #28 in FY2024 and #45 in FY2025; down 9 since Jul 2024–Jun 2025.
42	Alutiiq General Contractors, LLC Top agencies Army (Department of the Army)	$1,482,209	0.5%	Rank history: not on the FY2021–FY2024 lists and #34 in FY2025; new, not ranked in Jul 2024–Jun 2025.
43	M & F Concrete, Inc. Top agencies Army (Department of the Army)	$1,357,776	0.5%	Rank history: not on the FY2021–FY2024 lists and #39 in FY2025; new, not ranked in Jul 2024–Jun 2025.
44	Harkness Contracting, Inc. Top agencies USDA (Department of Agriculture)	$1,357,487	0.5%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
45	Stefaniks Next Generation Contracting Co. Top agencies USAF (Department of the Air Force)	$1,342,200	0.5%	Rank history: not on the FY2021–FY2025 lists; up 57 since Jul 2024–Jun 2025.
46	MDU Resources Group, Inc. Through JTL Group, Inc. Top agencies USAF (Department of the Air Force)	$1,302,577	0.5%	Rank history: #84 in FY2021, #33 in FY2022, #74 in FY2023, #30 in FY2024 and #77 in FY2025; down 11 since Jul 2024–Jun 2025.
47	Transtar Pipeline and Orion Construction JV Top agencies Navy (Department of the Navy)	$1,254,525	0.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
48	Robinson Xcavating & Hauling LLC Top agencies USDA (Department of Agriculture)	$1,184,626	0.4%	Rank history: not on the FY2021–FY2024 lists and #57 in FY2025; new, not ranked in Jul 2024–Jun 2025.
49	Command Performance Constructors Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$1,131,990	0.4%	Rank history: not on the FY2021–FY2024 lists and #27 in FY2025; down 24 since Jul 2024–Jun 2025.
50	Defender Contracting & Construction LLC Top agencies USAF (Department of the Air Force)	$1,122,640	0.4%	Rank history: not on the FY2021–FY2024 lists and #42 in FY2025; up 114 since Jul 2024–Jun 2025.
51	Aleut Field Services, LLC Top agencies Army (Department of the Army)	$1,071,038	0.4%	Rank history: not on the FY2021–FY2022 lists, #46 in FY2023, not on the FY2024 list and #25 in FY2025; down 2 since Jul 2024–Jun 2025.
52	Fisher Land Co Top agencies USDA (Department of Agriculture)	$1,049,573	0.4%	Rank history: not on the FY2021–FY2024 lists and #61 in FY2025; new, not ranked in Jul 2024–Jun 2025.
53	Hulxe Construction Services LLC Top agencies DOI (Department of the Interior)	$1,046,759	0.4%	Rank history: not on the FY2021–FY2023 lists, #43 in FY2024 and #71 in FY2025; down 12 since Jul 2024–Jun 2025.
54	Standridge Bulldozing Inc Top agencies USDA (Department of Agriculture)	$1,027,301	0.4%	Rank history: not on the FY2021–FY2024 lists and #46 in FY2025; new, not ranked in Jul 2024–Jun 2025.
55	Amtrac Railroad Contractors of Maryland, Inc. Top agencies Army (Department of the Army)	$1,003,635	0.3%	Rank history: #76 in FY2021, #65 in FY2022, #81 in FY2023, #75 in FY2024 and #29 in FY2025; down 7 since Jul 2024–Jun 2025.
56	JD General Engineering Corp Top agencies USDA (Department of Agriculture)	$999,188	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
57	Statewide Stripes, Inc. Top agencies USAF (Department of the Air Force)	$994,745	0.3%	Rank history: not on the FY2021–FY2024 lists and #47 in FY2025; new, not ranked in Jul 2024–Jun 2025.
58	Asphalt Preservation, LLC Top agencies USAF (Department of the Air Force) DOI (Department of the Interior)	$978,550	0.3%	Rank history: not on the FY2021–FY2024 lists and #49 in FY2025; new, not ranked in Jul 2024–Jun 2025.
59	Bayer Construction Company, Inc. Top agencies Army (Department of the Army)	$950,142	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
60	Ketchikan Ready-Mix & Quarry, Inc. Top agencies USDA (Department of Agriculture)	$925,000	0.3%	Rank history: #58 in FY2021, not on the FY2022–FY2024 lists and #52 in FY2025; new, not ranked in Jul 2024–Jun 2025.
61	Good Steward Holdings LLC Top agencies VA (Department of Veterans Affairs)	$897,400	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
62	Asphalt Systems Inc. Top agencies DOI (Department of the Interior)	$868,616	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
63	Cauble & Sons Grading & Stone Work, Inc. Top agencies USDA (Department of Agriculture)	$867,758	0.3%	Rank history: not on the FY2021–FY2024 lists and #35 in FY2025; down 12 since Jul 2024–Jun 2025.
64	Larsen, E Co Top agencies USDA (Department of Agriculture)	$846,436	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
65	Aktarius LLC Top agencies Navy (Department of the Navy)	$843,767	0.3%	Rank history: not on the FY2021–FY2024 lists and #58 in FY2025; up 2 since Jul 2024–Jun 2025.
66	Jamesco Pro Inc. Top agencies USDA (Department of Agriculture)	$843,697	0.3%	Rank history: #51 in FY2021, not on the FY2022–FY2023 lists, #72 in FY2024 and #60 in FY2025; up 111 since Jul 2024–Jun 2025.
67	T & C Clearing & Railroad Repair, Inc. Top agencies Navy (Department of the Navy)	$819,598	0.3%	Rank history: #44 in FY2021, not on the FY2022 list, #65 in FY2023, #73 in FY2024 and #50 in FY2025; up 7 since Jul 2024–Jun 2025.
68	Simon Contractors Top agencies USAF (Department of the Air Force)	$806,114	0.3%	Rank history: not on the FY2021–FY2023 lists, #68 in FY2024 and #37 in FY2025; down 39 since Jul 2024–Jun 2025.
69	J & J Asphalt Co Top agencies USAF (Department of the Air Force)	$803,228	0.3%	Rank history: not on the FY2021–FY2023 lists, #45 in FY2024 and #93 in FY2025; down 8 since Jul 2024–Jun 2025.
70	Guardian DB Services,Llc Top agencies DOI (Department of the Interior)	$787,749	0.3%	Rank history: not on the FY2021–FY2024 lists and #63 in FY2025; new, not ranked in Jul 2024–Jun 2025.
71	Heath & Sons Management Services, LLC Top agencies DHS (Department of Homeland Security)	$750,000	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
72	Ajce Corporation Top agencies DOI (Department of the Interior)	$731,977	0.3%	Rank history: not on the FY2021–FY2023 lists, #71 in FY2024 and #66 in FY2025; up 3 since Jul 2024–Jun 2025.
73	Warm Springs Construction Enterprise Top agencies USDA (Department of Agriculture)	$722,675	0.3%	Rank history: not on the FY2021–FY2023 lists, #57 in FY2024 and #78 in FY2025; up 5 since Jul 2024–Jun 2025.
74	F D Riley & Sons Inc. Top agencies USDA (Department of Agriculture)	$715,685	0.2%	Rank history: not on the FY2021–FY2024 lists and #69 in FY2025; up 2 since Jul 2024–Jun 2025.
75	Geostabilization International, LLC Top agencies USDA (Department of Agriculture)	$689,632	0.2%	Rank history: #85 in FY2021, not on the FY2022–FY2023 lists, #60 in FY2024 and #83 in FY2025; down 35 since Jul 2024–Jun 2025.
76	Etchmark Pavement Maintenance Experts, LLC Top agencies VA (Department of Veterans Affairs)	$673,544	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
77	C.R Contracting LLC Top agencies DOI (Department of the Interior)	$647,640	0.2%	Rank history: not on the FY2021–FY2024 lists and #91 in FY2025; new, not ranked in Jul 2024–Jun 2025.
78	Toro Defense Contracting, LLC Top agencies Navy (Department of the Navy)	$637,610	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
79	B.a. Van De Grift, Inc. Top agencies USDA (Department of Agriculture)	$618,724	0.2%	Rank history: not on the FY2021–FY2024 lists and #67 in FY2025; up 62 since Jul 2024–Jun 2025.
80	Hunt Hauling & Construction Co., Inc. Top agencies USDA (Department of Agriculture)	$607,875	0.2%	Rank history: not on the FY2021–FY2025 lists; up 67 since Jul 2024–Jun 2025.
81	Baseline Contracting Inc. Top agencies Army (Department of the Army)	$571,052	0.2%	Rank history: not on the FY2021–FY2024 lists and #76 in FY2025; new, not ranked in Jul 2024–Jun 2025.
82	Mullenix Trucking Inc. Top agencies USDA (Department of Agriculture)	$567,816	0.2%	Rank history: not on the FY2021–FY2022 lists, #89 in FY2023, #87 in FY2024 and #80 in FY2025; up 21 since Jul 2024–Jun 2025.
83	Russell Byrd Top agencies USDA (Department of Agriculture)	$565,195	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
84	Moreno & Nelson Construction Corp Top agencies USDA (Department of Agriculture)	$561,887	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
85	United Materials of Great Falls Inc. Top agencies USAF (Department of the Air Force)	$556,292	0.2%	Rank history: not on the FY2021–FY2023 lists, #64 in FY2024 and #40 in FY2025; down 35 since Jul 2024–Jun 2025.
86	Easy Street Gravel Road Repair LLC Top agencies DOI (Department of the Interior)	$546,063	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
87	CCI Facility Support Services, LLC Top agencies Navy (Department of the Navy)	$521,887	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
88	Bishop, Inc. Top agencies DOI (Department of the Interior)	$513,735	0.2%	Rank history: not on the FY2021–FY2024 lists and #82 in FY2025; new, not ranked in Jul 2024–Jun 2025.
89	Dambacher Construction Inc. Top agencies USDA (Department of Agriculture)	$500,000	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
90	Compagnie Financiere DE Travaux Publics ET Agregats Through Etablissements Wanty Maurice Top agencies Army (Department of the Army)	$499,425	0.2%	Rank history: not on the FY2021–FY2024 lists and #86 in FY2025; up 100 since Jul 2024–Jun 2025.
91	North Star Government Services Top agencies Navy (Department of the Navy)	$498,144	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
92	Ecklund Excavation & Development Inc. Top agencies USDA (Department of Agriculture)	$492,993	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
93	Runions Construction LLC Top agencies USDA (Department of Agriculture)	$477,565	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
94	Cutting Edge Contractors Inc. Top agencies USDA (Department of Agriculture)	$476,478	0.2%	Rank history: not on the FY2021 list, #74 in FY2022, not on the FY2023–FY2024 lists and #89 in FY2025; new, not ranked in Jul 2024–Jun 2025.
95	JX Construction, LLC Top agencies USDA (Department of Agriculture)	$476,372	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
96	Boomtown Services LLC Top agencies Army (Department of the Army)	$475,380	0.2%	Rank history: not on the FY2021–FY2023 lists, #36 in FY2024 and #90 in FY2025; down 62 since Jul 2024–Jun 2025.
97	Golat & Engel Custom Gravel Crushing Inc. Top agencies USDA (Department of Agriculture)	$456,788	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
98	GCH Construction Company Top agencies Army (Department of the Army)	$456,761	0.2%	Rank history: not on the FY2021–FY2023 lists, #92 in FY2024 and #88 in FY2025; down 7 since Jul 2024–Jun 2025.
99	Sproul Construction, Inc. Top agencies Army (Department of the Army)	$454,308	0.2%	Rank history: not on the FY2021–FY2023 lists, #79 in FY2024 and #65 in FY2025; down 9 since Jul 2024–Jun 2025.
100	Tracks Unlimited, LLC Top agencies Navy (Department of the Navy)	$437,618	0.2%	Rank history: not on the FY2021–FY2024 lists and #38 in FY2025; down 43 since Jul 2024–Jun 2025.

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100 of 260 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 $289 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.

Quick answers

Who were the top 10 PSC Z1LB contractors in Jul 2025–Jun 2026?

1. Koman Construction, LLC ($22.3M), 2. Tactical Infrastructure Maintenance Solutions LLC ($19.3M), 3. Union Paving & Construction Co ($17.2M), 4. Mckenzie Construction & Site Development LLC ($16.5M), 5. RBA Engineering International, PLLC ($16.2M), 6. Columbus Barricades, Inc. ($13.1M), 7. Port Madison Construction Corporation ($12.4M), 8. NH1 JV ($7.56M), 9. Judd Buick Construction Inc. ($7.01M), 10. Teamgov, Inc. ($6.74M).

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