Top Interior ship building and repairing contractors
In the 12 months ending Nov 5, 2026, the Department of the Interior obligated $5.1M in net prime contract dollars under NAICS 336611, up 37.3% from $3.7M in the preceding 12 months. 26 prime contractors received positive obligations, and 10 of them accounted for 80% of that spend.
Prime contracts funded by the Department of the Interior. Latest 12 months: Nov 6, 2025 to Nov 5, 2026. Source: USAspending.gov.
See 1 potential recompetes ↓Obligations by fiscal year
Net prime contract obligations by federal fiscal year (October to September).
Top Interior contractors for NAICS 336611
Ranked by positive obligations in the latest 12 months. Share is of all positive obligations in this market.
| # | Contractor | Latest 12 mo | Prior 12 mo | Share | Rank change |
|---|---|---|---|---|---|
| 1 | Shipbuilders of Wisconsin, Inc. | $1.0M | $664K | 20.3% | ▲ 1 |
| 2 | Safe Boats International LLC | $670K | $813K | 13.2% | ▼ 1 |
| 3 | Silver Ships, Inc | $513K | $9K | 10.1% | ▲ 13 |
| 4 | J&H Marine | $433K | $0 | 8.5% | New |
| 5 | Platypus Marine Inc | $321K | $0 | 6.3% | New |
| 6 | Rogue Jet Boatworks, Inc | $267K | $0 | 5.2% | New |
| 7 | Fincantieri Marine Group LLC | $249K | $0 | 4.9% | New |
| 8 | JAG Alaska Inc. | $242K | $0 | 4.8% | New |
| 9 | Bay Ship & Yacht Co | $211K | $132K | 4.1% | ▲ 1 |
| 10 | Lake Assault Boats, LLC | $183K | $118K | 3.6% | ▲ 1 |
| 11 | ADR Power Systems Inc | $171K | $0 | 3.4% | New |
| 12 | 504 Strong Enterprises LLC | $143K | $81K | 2.8% | ▲ 1 |
| 13 | Ventura Harbor Boatyard Inc | $96K | $139K | 1.9% | ▼ 5 |
| 14 | Arabic Interpreters LLC | $90K | $0 | 1.8% | New |
| 15 | Bay Marine Boatworks, Inc. | $87K | $296K | 1.7% | ▼ 10 |
What changed in the last 12 months
Contractors with the largest change in reported obligations versus the preceding 12 months.
Largest gains
- $9K → $513K (+$504K) · now #3
- J&H Marine$0 → $433K (+$433K) · now #4
- Shipbuilders of Wisconsin, Inc.$664K → $1.0M (+$369K) · now #1
Largest declines
- Superior Shipyard and Fabrication, Inc.$369K → −$3 (−$369K) · no latest-period obligations
- Robert E. Derecktor, Inc.$312K → $0 (−$312K) · no latest-period obligations
- Gloucester Marine Railways Corp$210K → $0 (−$210K) · no latest-period obligations
New to this market
12 contractors received their first obligations in this market (since FY2022) during the latest 12 months. The largest:
| Contractor | First obligation | Latest 12 mo |
|---|---|---|
| Platypus Marine Inc | Sep 1, 2026 | $321K |
| Fincantieri Marine Group LLC | Jul 30, 2026 | $249K |
| JAG Alaska Inc. | Sep 11, 2026 | $242K |
| ADR Power Systems Inc | Aug 26, 2026 | $171K |
| Arabic Interpreters LLC | Dec 10, 2025 | $90K |
| Mast Automation LLC | Jan 9, 2026 | $67K |
| l3 Technologies Inc | Feb 20, 2026 | $63K |
| David Jablonski | Sep 9, 2026 | $42K |
Where the money comes from
Funding sub-agencies within the Department of the Interior, latest 12 months. The funding organization can differ from the office that runs the requirement.
| Funding sub-agency | Latest 12 mo | Prior 12 mo | Change |
|---|---|---|---|
| National Park Service | $1.9M | $2.4M | Down $475K (20.2%) |
| U.S. Fish and Wildlife Service | $1.8M | $191K | Up $1.6M (858.4%) |
| U.S. Geological Survey | $1.1M | $840K | Up $264K (31.4%) |
| Departmental Offices | $156K | $0 | New |
| Bureau of Reclamation | $87K | $296K | Down $209K (70.6%) |
Potential recompetes
Large awards in this market whose current period of performance ends in the next 18 months. Treat these as research leads: options, extensions, and follow-on vehicles often change the timing.
| Award | Incumbent | Obligated | Current end |
|---|---|---|---|
| 140P4322C0008 | Seas the Knight Boatbuilding LLC SAMA FRIENDSHIP" DECK REPAIRS | $2.5M | Jan 31, 2027 |
Common questions
Who are the top Interior contractors for NAICS 336611?
In the latest 12 months, Shipbuilders of Wisconsin, Inc. ($1.0M), Safe Boats International LLC ($670K), Silver Ships, Inc ($513K) received the most Interior obligations for ship building and repairing.
How concentrated is this market?
The eight largest primes held 73.2% of positive obligations, and Shipbuilders of Wisconsin, Inc. alone held 20.3%. 12 contractors won their first obligations in this market during the latest 12 months.
Are any large Interior NAICS 336611 contracts ending soon?
1 of the largest awards in this market reach their current end date in the next 18 months. The first is 140P4322C0008 (Seas the Knight Boatbuilding LLC, $2.5M obligated), ending Jan 31, 2027. An end date is a research lead, not a confirmed recompete: options and extensions often move it.
Related markets
NAICS 336611 across all agencies
DoD · NAICS 336611
$25.6BDHS · NAICS 336611
$8.0BDOT · NAICS 336611
$575.3MCommerce · NAICS 336611
$188.7MState Department · NAICS 336611
$47.9MFigures are net obligations on prime contracts (award types A–D) from USAspending.gov, grouped by funding agency and the NAICS code on each award. Net obligations include deobligations and corrections, so they can differ from positive-obligation totals. See methodology.
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