Leadership & Staff
William Chisholm
Private equity investor; bought Boston Celtics NBA professional basketball team in 2025
STG is based in Menlo Park, Calif. STG’s portfolio includes more than 50 active and closed investments, with about $10 billion of assets under management, as of March 2023. Symphony Technology Group, based in Menlo Park, California, which specializes in tech investing — in particular data, software, and analytics companies. STG, where he serves as managing partner and chief investment officer, bought and combined tech companies McAfee Enterprise and FireEye to create the cybersecurity company Trellix in 2022. STG also acquired Survey Monkey-parent Momentive.