Shaun Maguire
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Shaun Maguire is a venture capitalist and partner at Sequoia Capital, where he focuses on investments in deep tech, space, defense, and frontier technology companies. He holds a PhD in physics and began his career in technical roles before moving into venture investing at GV (formerly Google Ventures). While at GV, he co-founded the cybersecurity company Expanse, which was later acquired by Palo Alto Networks in 2020. He joined Sequoia Capital in 2019 and has since backed companies across the space and nuclear sectors, including leading Sequoia's investment in nuclear startup Valar Atomics. He is also known for being an outspoken commentator on technology and politics on social media.
Updated 5 August 2026
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August 2026
Valar Atomics raises $1 billion Series B funding led by Sequoia Capital at $6 billion valuation Funding