Shaun Maguire

Shaun Maguire is a partner at Sequoia Capital who bridges the worlds of theoretical physics and venture capital. With a PhD in quantum gravity from Caltech under John Preskill, he co-founded the cybersecurity company Expanse (acquired by Palo Alto Networks for over $1 billion) while completing his doctorate. At Sequoia, he leads investments in deep tech, aerospace, defense, and AI, backing companies like SpaceX, xAI, The Boring Company, and Neuralink. Before Sequoia, he was a partner at Google Ventures, where he led investments in Stripe, IonQ, and Opendoor. His unique background combines rigorous theoretical physics research on multiboundary wormholes with a track record of building and backing billion-dollar companies at the frontier of technology.