33 Series B Investors in San Mateo (2026)

33 investors backing series b startups from San Mateo, with stage, check size, and contact routes. Includes Mayfield Fund and Floodgate.

33 Series B investors in our directory list San Mateo as a base of operations. Across the 24 sectors we track in San Mateo, Series B ranks 13th by investor count. San Mateo is one of 11 cities with tracked Series B investors; New York leads with 94. Each profile links to the firm's stage focus, portfolio companies, and source-cited filings.

Other investor sectors in San Mateo (8)

Series B investors in other cities (8)

All Series B investors · All investors in San Mateo · Investor directory