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
- Self-certified in SAM.gov
- Entity structure
- Corporate Entity (Not Tax Exempt)
- NAICS codes registered in SAM.gov
-
- 336611 Ship Building and Repairing Primary
- 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
- 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 .
Recent federal awards
| Award | Agency | Obligated | Awarded |
|---|---|---|---|
| Insulation, thermal felt and acoustic insulation. | Naval Supply Systems Command | $33,303 | |
| Coated gloves, white ,yellow part number: 63PNFW-10 5293B034 | Land and Maritime | $183 | |
| Insulation, acoustic, fiber glass sound absorbing | Naval Supply Systems Command | $29,123 | |
| N4215851695132 life jacket | Land and Maritime | $11,250 | |
| Insulation acoustic | Naval Supply Systems Command | $17,886 |
About S3 Maritime LLC
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
What is S3 Maritime LLC's UEI?
S3 Maritime LLC's Unique Entity ID (UEI) in SAM.gov is XL1SMJGUEMG7.
What is S3 Maritime LLC's CAGE code?
S3 Maritime LLC's CAGE code is 5BJH0.
What is S3 Maritime LLC's primary NAICS code?
S3 Maritime LLC's primary NAICS code is 336611 (Ship Building and Repairing).
Where is S3 Maritime LLC located?
S3 Maritime LLC's physical address in SAM.gov is 2360 W Commodore Way #200, Seattle, WA 98199, USA.
Is S3 Maritime LLC registered in SAM.gov?
Yes. S3 Maritime LLC's SAM.gov registration is active through March 12, 2027.
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, 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
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