Castle & King
Castle & King is a small business in Vacaville, CA registered on SAM.gov to bid on federal contracts. It has won about $196,589 in federal prime contracts since fiscal year 2024, according to USAspending.gov.
- UEI
- W4J6UPZJA5E4
- CAGE code
- 156Z0
- SAM.gov registration
- Active
Registration details
| Legal business name | Castle & King |
|---|---|
| Unique Entity ID (UEI) | W4J6UPZJA5E4 |
| CAGE code | 156Z0 |
| Location | Vacaville, CA |
| SAM.gov registration | Active through Jul 9, 2027 |
| Business started | 2025 |
| Primary NAICS code | 484110: General Freight Trucking, Local |
| Website | castle-king.com |
Federal contract history
USAspending.gov shows no federal prime contracts for this UEI in the last five years. Many small businesses start as subcontractors to larger firms; see how to become a government subcontractor.
NAICS codes Castle & King is small under
On its SAM.gov registration, Castle & King meets the SBA size standard for these industries, so it can bid on small business set-asides that use them.
Open contracts in Castle & King's NAICS codes
2 open federal opportunities on SAM.gov use a NAICS code Castle & King is small under. These are due soonest.
- Brake Press Trainer – Freight and Delivery Sources Sought
Due in 3 daysOct 13, 2026
- Sources Sought Notice for Ready-Mix Concrete
✦ Fort Leonard Wood's contracting office (MICC-FLW) in Missouri is doing market research for ready-mix concrete (3000 and 4000 psi, 3 slump).
Due in 6 daysOct 16, 2026
Similar small businesses
Other small businesses with the same primary NAICS code (484110) that have won federal contracts, starting with California:
- Tressler's Trucking LLC, Plymouth, CA
- Muse Trucking, Inc., Redding, CA
- Steven R Hill, Redwood Valley, CA
- Zabel Enterprise LLC, Eureka, CA
- Payneless Logistics LLC, Bellflower, CA
- Kite Solutions LLC, Chico, CA
Frequently asked questions
What is Castle & King's CAGE code?
Castle & King's CAGE code is 156Z0. The Defense Logistics Agency assigns CAGE codes when a business registers on SAM.gov.
What is Castle & King's UEI?
Castle & King's Unique Entity ID (UEI) is W4J6UPZJA5E4. SAM.gov assigns the UEI, and it identifies the business across the federal government.
Is Castle & King's SAM.gov registration active?
Yes, as of the latest SAM.gov public data, Castle & King's registration is active through jul 9, 2027. Registrations are renewed every year.
Is Castle & King a small business?
Castle & King is registered on SAM.gov as small under 3 NAICS codes, including its primary code, 484110. Size is set per NAICS code, so a business can be small for some contracts and not others.
Keep going
- Look up another business's CAGE code or UEI
- Check a SAM.gov registration's status
- How to become a government subcontractor
Registration details come from SAM.gov's public entity extract and contract figures from USAspending.gov. Contact names and street addresses are left out. To change these details, update the registration on SAM.gov. To ask us to remove this page, email hello@fedready.us.