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Single Family OfficePuts its own capital into companiesLAST VERIFIED Jun 2026 · 1 SOURCES

Madrone Capital Partners

Single family office in Menlo Park, United States, founded 2005; focus on climate, fintech and industrial.

USEFUL FOR Co-investors

Family & background

FAMILY
Walton
HEADQUARTERS
Menlo Park, United States
FOUNDED
2005

Investment approach

ROUTES
Companies (own capital)

Overview

Headquartered in Menlo Park, United States, the firm is listed as a single family office founded in 2005. Sectors on record are climate, fintech, industrial and media. It invests directly in companies; 3 people are named on its team.

People

  • Greg Penner
    Founder · source
  • Jamie McJunkin
    Co-founder and General Partner · source
  • Thomas Patterson
    General Partner · source

Frequently asked questions

Madrone Capital Partners is a single family office based in Menlo Park, the United States, founded in 2005.

Madrone Capital Partners invests on behalf of the Walton family.

Madrone Capital Partners invests its own capital into companies.

Madrone Capital Partners invests in Climate & Energy, Fintech, Industrial & Manufacturing, Media & Entertainment and Software & SaaS.

Key people at Madrone Capital Partners include Greg Penner (Founder), Jamie McJunkin (Co-founder and General Partner) and Thomas Patterson (General Partner).