Matthew Sieben

Associate, Chicago



Matthew Sieben is an associate in the Firm's Mergers & Acquisitions practice, and is resident in our Chicago office. Matthew focuses his practice on representing strategic and financial buyers and sellers in various transactions including mergers, stock and asset acquisitions, venture capital and growth equity investments, in a broad variety of industries.

Bars and Courts
Illinois State Bar
Northwestern University Pritzker School of Law
University of Wisconsin–Madison


Representative matters include the representation of:

CM Life Sciences II (NASDAQ: CMII), a SPAC sponsored by affiliates of Casdin Capital, LLC and Corvex Management LP, in its US$1.23 billion business combination with SomaLogic, Inc., a protein biomarker discovery and clinical diagnostics company.

Al-Rayyan Holding LLC, an affiliate of Qatar Investment Authority (QIA), on its investment in the US$300 million equity financing round of Age of Learning, Inc., a privately held education company whose programs blend education best practices, innovative technology, and insightful creativity to create engaging and effective educational experiences, which was led by TPG.

QH Oil Investments LLC, an affiliate of Qatar Investment Authority (QIA), in:

  • its investment in the US$160 million Series C financing of Century Therapeutics, Inc., an early-stage life sciences company that is pioneering curative cell therapy products for cancer, which was led by Casdin Capital.
  • its US$116 million Series B financing of Entrada Therapeutics, Inc., a privately held biotechnology company dedicated to transforming the treatment of devastating diseases using intracellular biologics, which was led by Wellington Management Company.