603 Capital
Stoke Space Hopper test vehicle lifting off under its own engine plume

Stoke Space · First invested in 2022

Seamless mobility, to, through, and from space.

Backing the people building what comes next.
Independent capital. An operator's perspective.

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Rick Marini, Managing Director of 603 Capital

Rick Marini

Rick’s career spans more than 25 years as a serial entrepreneur and one of Silicon Valley’s most active angel investors. He founded multiple startups, including Tickle (acquired by Monster for $100 million), BranchOut (raised $49M, acquired by Hearst), Protocol Ventures (the first fund-of-funds in crypto), Rails.xyz (a regulated crypto perps exchange that raised $20M), and Catapult Capital (private equity focused on special situations). As an angel investor, Rick has executed more than 50 investments, including 15 unicorns. Forbes named him one of the Top 50 angel investors based on successful exits and deal volume.

At Catapult Capital, Rick led the firm’s sourcing, negotiation, and governance for the acquisitions of Grindr (Rick served as COO at Grindr before taking the company public on the NYSE with a market cap of $2 billion for a 9x equity return), JibJab (5x return), and Captiv8 (3x return in 18 months). He is actively involved with the firm’s current holdings, including Rails, Genalyte, Cellanome, Vesta, and Powerlaw. Rick’s areas of focus include consumer-facing technology, social and digital media, marketplaces, fintech, and blockchain.

Rick currently serves as a Board Member of Rails.xyz, Genalyte, The Peter T. Paul School of Business & Economics at The University of New Hampshire, and the Harvard Business School Global Advisory Board. He holds a B.S. in Business Administration from the University of New Hampshire, where he graduated magna cum laude, and received his MBA from Harvard Business School.

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Selected investments