Carrier profile · USDOT 2114900 · MC-807519 · Updated Jun 13, 2026

TREFETHEN & CO LLC

DBA BADER AND OLSON CADOGAN TATE SEATTLE

6 power unitsLocal · 2 statesSEATTLE, WA100/100
CARRIER ACTIVEMC-807519 ACTIVE
Verified linkstrefethenco.comFMCSA SAFER

Identity & Federal

The official FMCSA identity — legal name, DBA, addresses, contact, officers, and registration — alongside the daily-captured federal-record activity feed, monitored daily by Vektor.

Location

Physical address
3430 E MARGINAL WAY S, SEATTLE, WA, 98134
Operation
Interstate

Contact

Phone
(206) 447-1770
Email
sean@trefethenco.com
Web domain
trefethenco.com

Registration

Officer
Sean Trefethen
USDOT / docket
2114900 · MC-807519
First registered
Jan 27, 2011
Last MCS-150
Oct 14, 2024 · 49,000 mi (2023)
FMCSA safety rating
Not rated
Recordable crash rate
0.00
D-U-N-S
—

Fleet (self-reported · MCS-150)

6Power units
8Drivers
—CDL drivers
49,000Annual mileage

MCS-150 filing history· biennial-update cadence

Per-filing MCS-150 history (each biennial update + the fleet/mileage it reported) is being captured from the daily federal feed and will appear here as we capture the full history.

Federal record activity· monitored daily by Vektor

No licensing or insurance changes captured since Vektor began monitoring this carrier (June 2026). Quiet is usually good.