Top 51 Contractors in PSC Z1KF: Maintenance of Dredging Facilities, Jul 2025–Jun 2026

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Great Lakes Dredge & Dock Corporation Top agencies Army (Department of the Army)	$102,147,229	13.3%	Rank history: #2 in FY2021, #1 in FY2022, #1 in FY2023, #1 in FY2024 and #1 in FY2025; unchanged since Jul 2024–Jun 2025.
2	Donjon Marine Co., LLC Top agencies Army (Department of the Army)	$90,250,060	11.8%	Rank history: not on the FY2021–FY2024 lists and #6 in FY2025; new, not ranked in Jul 2024–Jun 2025.
3	Cottrell Contracting Corporation Top agencies Army (Department of the Army)	$64,364,097	8.4%	Rank history: #7 in FY2021, #11 in FY2022, #11 in FY2023, #3 in FY2024 and #7 in FY2025; up 3 since Jul 2024–Jun 2025.
4	Curtin Maritime Corp Top agencies Army (Department of the Army) Navy (Department of the Navy)	$60,888,047	7.9%	Rank history: #34 in FY2021, #7 in FY2022, #5 in FY2023, #12 in FY2024 and #3 in FY2025; down 1 since Jul 2024–Jun 2025.
5	Peter Kiewit Sons', Inc. Through Weeks Marine, Inc. Top agencies Army (Department of the Army)	$57,603,719	7.5%	Rank history: not on the FY2021–FY2022 lists, #7 in FY2023, #2 in FY2024 and #2 in FY2025; down 3 since Jul 2024–Jun 2025.
6	Norfolk Dredging Company Top agencies Army (Department of the Army)	$40,037,869	5.2%	Rank history: #1 in FY2021, #2 in FY2022, #2 in FY2023, #10 in FY2024 and #4 in FY2025; down 2 since Jul 2024–Jun 2025.
7	Inland Dredging Company, L.L.C. Top agencies Army (Department of the Army)	$35,505,697	4.6%	Rank history: not on the FY2021–FY2024 lists and #16 in FY2025; up 19 since Jul 2024–Jun 2025.
8	Cashman Dredging & Marine Contracting Co LLC Top agencies Army (Department of the Army)	$30,539,529	4.0%	Rank history: not on the FY2021–FY2024 lists and #5 in FY2025; unchanged since Jul 2024–Jun 2025.
9	Southwind Construction Corp. Top agencies Army (Department of the Army)	$22,023,809	2.9%	Rank history: not on the FY2021–FY2023 lists, #47 in FY2024 and #8 in FY2025; up 11 since Jul 2024–Jun 2025.
10	Ohishi Construction Co. Ltd Top agencies Navy (Department of the Navy)	$21,445,766	2.8%	Rank history: #8 in FY2021, #18 in FY2022, not on the FY2023 list, #32 in FY2024 and #10 in FY2025; up 26 since Jul 2024–Jun 2025.
11	Mike Hooks, LLC Top agencies Army (Department of the Army)	$17,868,250	2.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
12	Maverick Constructors, LLC Top agencies Army (Department of the Army)	$11,506,484	1.5%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
13	Manson Construction Co Top agencies Army (Department of the Army)	$9,673,980	1.3%	Rank history: #15 in FY2021, #5 in FY2022, #10 in FY2023, #5 in FY2024 and #9 in FY2025; down 8 since Jul 2024–Jun 2025.
14	Atlantic & Gulf Dredging & Marine LLC Top agencies Army (Department of the Army)	$8,693,100	1.1%	Rank history: not on the FY2021–FY2024 lists and #41 in FY2025; new, not ranked in Jul 2024–Jun 2025.
15	Coastal Dredging Co, Inc. Top agencies Army (Department of the Army)	$8,638,913	1.1%	Rank history: #31 in FY2021, not on the FY2022–FY2024 lists and #39 in FY2025; new, not ranked in Jul 2024–Jun 2025.
16	The Dutra Group Top agencies Army (Department of the Army)	$8,447,094	1.1%	Rank history: #3 in FY2021, #29 in FY2022, #9 in FY2023, #14 in FY2024 and #12 in FY2025; down 7 since Jul 2024–Jun 2025.
17	Precision Construction LLC Top agencies Army (Department of the Army)	$7,967,249	1.0%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
18	Spectraserv Inc. Top agencies Army (Department of the Army)	$7,396,955	1.0%	Rank history: not on the FY2021–FY2022 lists, #26 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
19	L S Marine Inc Top agencies Army (Department of the Army)	$7,374,400	1.0%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
20	Marinex Construction Inc. Top agencies Army (Department of the Army)	$7,126,908	0.9%	Rank history: #4 in FY2021, #3 in FY2022, #3 in FY2023, #33 in FY2024 and #11 in FY2025; down 9 since Jul 2024–Jun 2025.
21	Kokosing Industrial Inc. Top agencies Army (Department of the Army)	$6,757,900	0.9%	Rank history: not on the FY2021–FY2024 lists and #17 in FY2025; down 2 since Jul 2024–Jun 2025.
22	Ahtna Marine & Construction Company, LLC Top agencies Army (Department of the Army)	$6,112,664	0.8%	Rank history: #10 in FY2021, #13 in FY2022, #31 in FY2023, #18 in FY2024 and #18 in FY2025; up 12 since Jul 2024–Jun 2025.
23	Southern Dredging Co Inc. Top agencies Army (Department of the Army)	$5,970,550	0.8%	Rank history: #20 in FY2021, #8 in FY2022, #18 in FY2023, #13 in FY2024 and #21 in FY2025; unchanged since Jul 2024–Jun 2025.
24	Three Oaks Construction, Inc. Top agencies Army (Department of the Army)	$5,962,000	0.8%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
25	Alaska Marine Excavation LLC Top agencies Army (Department of the Army)	$5,603,563	0.7%	Rank history: #28 in FY2021, #25 in FY2022, not on the FY2023 list, #50 in FY2024 and #20 in FY2025; unchanged since Jul 2024–Jun 2025.
26	Amherst Madison, Inc. Top agencies Army (Department of the Army)	$4,941,147	0.6%	Rank history: not on the FY2021–FY2024 lists and #19 in FY2025; up 5 since Jul 2024–Jun 2025.
27	Seacoast Construction Inc. Top agencies Army (Department of the Army)	$4,169,000	0.5%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
28	H & L Contracting LLC Top agencies Army (Department of the Army)	$4,023,690	0.5%	Rank history: not on the FY2021–FY2023 lists, #35 in FY2024 and #22 in FY2025; up 1 since Jul 2024–Jun 2025.
29	Texas Dewatering LLC Top agencies Army (Department of the Army)	$3,859,360	0.5%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
30	JD Bravo Co Inc. Top agencies Army (Department of the Army)	$3,718,439	0.5%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
31	Apollo Environmental Strategies Inc. Top agencies Army (Department of the Army)	$3,569,425	0.5%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
32	Clore Equipment LLC Top agencies Army (Department of the Army)	$3,309,753	0.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
33	US Aqua Services LLC Top agencies Army (Department of the Army)	$2,783,000	0.4%	Rank history: not on the FY2021–FY2022 lists, #32 in FY2023, not on the FY2024 list and #23 in FY2025; new, not ranked in Jul 2024–Jun 2025.
34	DOT Construction, Inc. Top agencies Army (Department of the Army)	$2,690,185	0.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
35	Galvin Bros & Madhue Contracting JV Top agencies DHS (Department of Homeland Security)	$2,253,692	0.3%	Rank history: not on the FY2021–FY2024 lists and #24 in FY2025; new, not ranked in Jul 2024–Jun 2025.
36	Dredgit Corporation Top agencies Army (Department of the Army)	$1,831,665	0.2%	Rank history: not on the FY2021–FY2022 lists, #30 in FY2023, #29 in FY2024 and not on the FY2025 list; down 8 since Jul 2024–Jun 2025.
37	G.c. Environmental and Trucking LLC Top agencies Army (Department of the Army)	$1,649,660	0.2%	Rank history: not on the FY2021–FY2024 lists and #27 in FY2025; new, not ranked in Jul 2024–Jun 2025.
38	Chesterfield Associates Inc. Top agencies DHS (Department of Homeland Security)	$1,608,230	0.2%	Rank history: not on the FY2021–FY2024 lists and #26 in FY2025; new, not ranked in Jul 2024–Jun 2025.
39	Aqua Survey, Inc. Top agencies Army (Department of the Army)	$1,488,166	0.2%	Rank history: not on the FY2021–FY2024 lists and #35 in FY2025; new, not ranked in Jul 2024–Jun 2025.
40	Kuuk Investments, LLC Through HME Construction Inc. Top agencies DHS (Department of Homeland Security)	$982,500	0.1%	Rank history: not on the FY2021–FY2023 lists, #39 in FY2024 and not on the FY2025 list; up 5 since Jul 2024–Jun 2025.
41	Battelle Memorial Institute Top agencies Army (Department of the Army)	$816,537	0.1%	Rank history: not on the FY2021–FY2024 lists and #36 in FY2025; new, not ranked in Jul 2024–Jun 2025.
42	AECOM Technical Services, Inc. Top agencies Army (Department of the Army)	$799,853	0.1%	Rank history: not on the FY2021–FY2024 lists and #34 in FY2025; new, not ranked in Jul 2024–Jun 2025.
43	Galvin Bros., Inc. Top agencies DHS (Department of Homeland Security)	$587,500	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
44	Healy Tibbitts Builders, Inc. Top agencies Army (Department of the Army)	$557,260	0.1%	Rank history: not on the FY2021–FY2023 lists, #43 in FY2024 and #29 in FY2025; down 9 since Jul 2024–Jun 2025.
45	Herve Cody Contractor LLC Top agencies Army (Department of the Army)	$422,178	0.1%	Rank history: not on the FY2021–FY2023 lists, #17 in FY2024 and #38 in FY2025; down 29 since Jul 2024–Jun 2025.
46	Better By Design LLC Top agencies Army (Department of the Army)	$243,319	<0.1%	Rank history: not on the FY2021–FY2022 lists, #29 in FY2023, not on the FY2024 list and #32 in FY2025; down 7 since Jul 2024–Jun 2025.
47	Lucianos Excavation Inc Top agencies Army (Department of the Army)	$149,500	<0.1%	Rank history: not on the FY2021–FY2023 lists, #34 in FY2024 and #37 in FY2025; down 17 since Jul 2024–Jun 2025.
48	W.f. Baird & Associates Ltd. Top agencies Army (Department of the Army)	$115,868	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
49	Orion Marine Construction, Inc. Top agencies Army (Department of the Army)	$100,704	<0.1%	Rank history: not on the FY2021–FY2023 lists, #9 in FY2024 and #30 in FY2025; down 39 since Jul 2024–Jun 2025.
50	AGM Marine Contractors Inc. Top agencies Army (Department of the Army)	$20,000	<0.1%	Rank history: not on the FY2021–FY2024 lists and #40 in FY2025; new, not ranked in Jul 2024–Jun 2025.
51	Next Generation Logistics, LLC Top agencies Army (Department of the Army)	$20,000	<0.1%	Rank history: not on the FY2021–FY2023 lists, #23 in FY2024 and #42 in FY2025; new, not ranked in Jul 2024–Jun 2025.

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 $766 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.

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