NAICS 488390: Other Support Activities for Water Transportation — Federal Contracts

What NAICS 488390 covers

The North American Industry Classification System (NAICS) is the standard the federal government uses to classify the industry of every contractor and every procurement. NAICS 488390 identifies businesses primarily engaged in other support activities for water transportation. When a contracting officer publishes a solicitation on SAM.gov, they tag it with the NAICS code that best matches the work — which is why getting your NAICS portfolio right inside SAM is the single most important step for showing up in agency searches.

Who buys NAICS 488390?

The federal agencies awarding the most contract value to vendors in this NAICS, based on 5 contractors tracked in the Mindy contractor database:

1. 1Dept Of The Navy
2. 2Dept Of The Army

Source: aggregated from the Mindy contractor database (prime contractor disclosures via SBA + agency directories).

Top contractors in NAICS 488390

The largest prime contractors associated with NAICS 488390, ranked by total reported federal contract value. These are your most likely incumbents — and your most likely teaming partners on recompetes:

1. 1
   Huntington Ingalls Industries INC.

   $2.9B total reported value
2. 2
   Donjon Marine CO. INC.

   $154.1M total reported value
3. 3
   Global Pcci (gpc)

   $32.4M total reported value
4. 4
   Systems Application & Technologies INC

   $5.9M total reported value
5. 5
   Koninklijke Boskalis Westminster N.v.

   $1.3M total reported value

Values reflect each contractor's aggregate reported federal contract value (across all of their NAICS codes, not just 488390). Use as a ranking signal, not as a per-NAICS award total.