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Corner appointment of Michael Sonnenshein as Partner & Group President

May 30, 2026 | By Startuprise io

Corner, an investment firm that backs, builds, and operates companies across the AI industry, has appointed Michael Sonnenshein as Partner and Group President.

Effective immediately, Michael Sonnenshein has joined the leadership team at Corner as the firm brings together its hard asset investing, company-building, and venture capital activities under a single brand, Corner.

With more than a decade of experience leading and scaling businesses in emerging industries, Michael Sonnenshein brings a strong focus on operational excellence to his new role. As CEO of Grayscale Investments, he helped grow the firm into the world’s largest digital asset manager, and played a key role in advancing Bitcoin ETFs in the U.S.

Most recently, Sonnenshein served as President of Securitize. He also serves as a strategic advisor and board member for several financial and technology companies.

"Michael has spent his career building bridges between investors and emerging technology at the highest levels," said Marvin Tien, Executive Chairman of Corner. "By focusing on operational and regulatory rigor, Michael has helped multiple businesses scale, and we are confident his expertise will be invaluable to Corner as we enter the Intelligent Decade."

"Michael brings rare experience operating at the intersection of innovation and institutional finance. He knows how to build credibility, navigate complex markets, and drive performance, making him a powerful addition to our leadership team," said Jane Mathieu, CEO of Corner. "Michael has already helped shape an entire asset class, and now he's bringing that same institutional-grade leadership to Corner."

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"Corner is unquestionably unique. With a high-caliber team, a breadth of investment offerings, and a global network of founders and LPs, I would be hard-pressed to find a firm as well-positioned for the future as Corner," said Michael Sonnenshein, Corner Partner & Group President. "For decades and without fanfare, Corner has been focused on investing and building at intersections where emerging technology is transforming an area of the economy, and I could not be more excited to join Marvin, Jane, and the entire Corner team as we strengthen our position as the go-to partner for investors interested in capturing the upside of the next decade."

ABOUT CORNER

Founded in 2018, Corner is a multi-billion-dollar investment firm that invests in, builds, and operates companies across the AI economy. The firm combines hard-asset investing, company creation, and venture capital to create opportunities through its network, expertise, and industry relationships. Corner focuses on three main areas of the AI ecosystem: AI technology, the energy and infrastructure that support it, and human-centered experiences that technology cannot replace.

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