# Stephen Bonelli

> Stephen Bonelli is a startup investor in Los Gatos. See 0 investments, check sizes, portfolio and contact details. Updated Oct 2026.

- Type: Angel Investor
- Location: Los Gatos, United States
- Last updated: Oct 2026
- LinkedIn: https://www.linkedin.com/in/stephen-j-bonelli

Stephen Bonelli is a startup investor in Los Gatos. Steve came to Three Arch Partners in 2005 with over 20 years of experience as a financial professional, including over ten years as a senior financial executive in the medical technology industry. Before joining Three Arch Partners, Steve served as the Chief Financial Officer of U-Systems, a breast ultrasound company, Align Technology, adental technology company which he took public in 2001 and General Surgical Innovations, a Three Arch Partners I medical device company, which he took public in 1996 and which was acquired by Tyco International in 1999. He also held a management position with Ernst & Young. Steve has helped raise over $200 million in private and public financings during his career.

## Contacts

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