503 Partners
503 Partners is a venture capital investor based in Portland, United States. It reports about $29m in private-fund assets across 5 private funds to the US Securities and Exchange Commission (Form ADV, October 2026).
Part of the 311 Institute Global Investors Directory (311institute.com). Last updated .
Other investors in United States
- New Mountain Capital
- Sixth Street
- Blackstone Life Sciences
- Macquarie Infrastructure Partners
- H.I.G. Capital
- Comvest Credit
- Court Square Capital
- Hamilton Lane
- Peak Rock Capital
- TPG Solutions
- Patient Square Capital
- Kleiner Perkins
Related
- Innovation profile of Portland
- United States: economy and key statistics
- Global Startups Directory
- All 311 Indexes
Questions and answers
What kind of investor is 503 Partners?
503 Partners is a venture capital investor based in Portland, United States.
Where is 503 Partners based?
503 Partners is headquartered in Portland, United States, according to its filing with the US Securities and Exchange Commission.
How much does 503 Partners manage?
It reports about $29m in private-fund assets across 5 private funds to the US Securities and Exchange Commission (Form ADV, October 2026).
Source: US Securities and Exchange Commission adviser record (Form ADV and Form D filings), as of October 2026.
© 311 Institute 2026. Facts from the sources linked on this page. The selection, classification and links are the proprietary work of the 311 Institute, protected by copyright and database rights.