S3 Maritime LLC
Seattle, WA Doing business as West Coast Insulation
- UEI
- XL1SMJGUEMG7
- CAGE
- 5BJH0
- Primary NAICS
- 336611 Ship Building and Repairing
- SAM.gov registration
- Active through
Company facts
- FY2025 rankings
- Self-certified in SAM.gov
- Entity structure
- Corporate Entity (Not Tax Exempt)
- Other NAICS codes in SAM.gov
-
- 238210 Electrical Contractors and Other Wiring Installation Contractors
- 238220 Plumbing, Heating, and Air-Conditioning Contractors
- 238290 Other Building Equipment Contractors
- 238310 Drywall and Insulation Contractors
- 238990 All Other Specialty Trade Contractors
- 332710 Machine Shops
- 332999 All Other Miscellaneous Fabricated Metal Product Manufacturing
- 335314 Relay and Industrial Control Manufacturing
- SAM.gov registration date
- Physical address
- 2360 W Commodore Way #200, Seattle, WA 98199, USA
- Website
- s3maritime.com
- Founded
- 2007
- Employees
- 11-50
- Estimated annual revenue
- $1M-$10M
- Industry
-
- Industrials
- Transportation
- Marine
- SIC code
- 39 Miscellaneous Manufacturing Industries
Registration and certifications come from SAM.gov and the SBA; company details from public web sources. Updated .
Contract obligations by fiscal year
| Fiscal year | Obligated |
|---|---|
| FY2027 To date | $0 |
| FY2026 | $33,486 |
| FY2025 | $39,771 |
| FY2024 | $18,488 |
Top agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Department of the Navy | $33,486 |
Contract awards
Latest 5 listed here. See the rest on GovTribe.
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About the company
S3 Maritime LLC, doing business as West Coast Insulation, is a small disadvantaged business based in Seattle, Washington that supplies thermal insulation, acoustic insulation, and maritime safety equipment to the Department of the Navy as a prime contractor under Total Small Business set-asides. The company operates as a limited liability corporation and competes exclusively under small business set-asides on purchase orders issued by Naval commands.
S3 Maritime's customer base is concentrated entirely within the Department of the Navy. The Naval Sea Systems Command dominates the footprint, accounting for 6 of 9 awards and $114 thousand combined potential value across thermal felt, acoustic fiber glass, fire insulation, and insulation board materials. The Military Sealift Command, Strategic Systems Programs, and Naval Supply Systems Command round out the vendor's Navy customer set, collectively generating $38 thousand in additional potential value. All nine awards in the source data are prime purchase orders under Total Small Business set-asides; the vendor operates no subcontract engagements and holds no parent contract vehicles, IDIQs, BPAs, or GWACs.
Concrete recent work includes a $33,302.50 firm fixed-price purchase order from Naval Sea Systems Command awarded February 27, 2026 for thermal felt and acoustic insulation materials destined for U.S. Naval Base Yokosuka, Japan, a $29,122.80 order from Naval Sea Systems Command awarded September 9, 2025 for acoustic fiber glass sound-absorbing insulation for the Fleet Logistics Center Puget Sound in Seattle, and an $11,250 purchase order from Naval Sea Systems Command awarded August 26, 2025 for life jackets with performance at Portsmouth, Virginia. Earlier awards include fire insulation ($10,383.08, December 2021), insulation board materials ($12,149.37, September 2021), and life jackets ($12,910.67, September 2022) through Naval Strategic Systems Programs.
Award activity has been sporadic: two orders in 2021, one in 2022, a gap in 2023, one in 2024, and three in 2025 with one in early 2026. Combined potential value across all nine awards stands at $152 thousand, with 100% of that amount obligated. The vendor's narrow product focus — mineral wool manufacturing and insulation materials under NAICS 327993, with wallboard and thermal insulation materials the dominant PSC category — and exclusive Navy customer base position S3 Maritime as a niche supplier of commoditized maritime insulation and safety equipment rather than a contractor competing for larger systems or IT work.
Quick answers
Is S3 Maritime LLC registered in SAM.gov?
Yes. S3 Maritime LLC's SAM.gov registration is active through March 12, 2027.
How much has S3 Maritime LLC received in federal contracts?
Federal contracts obligated $39,771 to S3 Maritime LLC in fiscal year 2025 and $91,744 in fiscal years 2023 through 2027.
How does S3 Maritime LLC rank among federal contractors?
S3 Maritime LLC ranked #42 in PSC 5640 and #90 in NAICS 32799 in FY2025.
What is S3 Maritime LLC's most recent federal award?
S3 Maritime LLC's most recent federal contract award is Insulation, thermal felt and acoustic insulation (N0040626PS112), from Naval Supply Systems Command (Navy), on February 27, 2026.
On GovTribe
See S3 Maritime LLC's full federal record
- Federal contract awards
- Funding analysis by agency, NAICS and set-aside
- Similar vendors