Sunstone Partners

Sunstone's sourcing model relies on a narrow sector focus — technology-enabled services and healthcare services — combined with founder-direct origination in the lower mid-market. By targeting companies with $5 million to $25 million in EBITDA, the firm operates beneath the auction-process threshold that dominates deals above $100 million in enterprise value. The co-founders' fifteen-plus-year network across West Coast and national technology-services ecosystems provides repeat founder and intermediary introductions.

Sunstone makes direct control and significant minority equity investments in operating companies. The firm does not operate a fund-of-funds program or take limited-partner stakes in external private equity vehicles. Its capital goes entirely into company-level transactions, with equity checks ranging from $30 million to $200 million per platform investment.

Sunstone Partners was founded in 2015 by Mike Biggee and Arneek Multani, who previously served as managing directors at GI Partners, a San Francisco-based private equity firm. Sunstone is an independent entity with no shared limited-partner reporting lines, co-investment vehicles, or carried-interest structures linking it to GI Partners. The spinout was amicable, and the firms operate entirely separate investment programs.