503 Partners

VC firm · Portland, OR

SEC-registered adviser

Venture capital adviser registered with the SEC (exempt reporting adviser), based in Portland, OR. Advises 9 venture funds. Latest adviser filing Mar 2026.

Stages
Pre-seed, Seed
Typical check (est.)
$375K–$1.1M
Latest fund
None on file
Last verified activity
Not in the last 12 months

Focus

Climate & Energy

Sources

Profile last verified Oct 12, 2026. Is this you? Correct or remove this profile.