Heidi Roizen is a Partner at Threshold Ventures, where she invests from seed through late stage (Seed, Series A–C and later) in the United States, with a focus on California, the San Francisco Bay Area, and the broader Western US. She serves on the boards of Tia and UPSIDE Foods, and has invested in companies like Planet, UPSIDE Foods, Tia, Polarr, and Lumity, Inc. Threshold Ventures’ most recent fundraise was in 2019. Previously, she was Co‑founder and CEO of T/Maker and served as VP of Worldwide Developer Relations at Apple. Heidi attended Stanford University Graduate School of Business and lives in the San Francisco Bay Area.
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