San Diego – September 17, 2025 – Cooley advised Mabwell Bioscience, an innovation-driven biopharmaceutical company with capabilities spanning the entire pharmaceutical value chain, on its exclusive license agreement with Aditum Bio to launch Kalexo Bio, a new company formed in conjunction with an exclusive global license agreement to develop 2MW7141, a novel dual-target small interfering RNA (siRNA) candidate for lipid management in patients with dyslipidemia and for the prevention of high-risk atherosclerotic cardiovascular disease events.

Under the agreement, Mabwell will grant Kalexo Bio exclusive worldwide rights to develop, manufacture and commercialize 2MW7141. Mabwell is eligible to receive up to $1 billion in upfront and milestone payments, as well as tiered royalties on global sales. This includes $12 million in nonrefundable upfront and near-term cash payments. Mabwell will also receive an equity stake in Kalexo Bio.

The Cooley team was led by life sciences corporate partnering and licensing lawyers Charity Williams and Freddy Yip, as well as corporate lawyers Ken Rollins and Brett Dovman, with valuable support from Jeffrey Tolin and Amanda Pacheco on tax, Andrew Epstein and Zhijing Yu on cyber/data/privacy, Christopher Kimball on CFIUS, David Burns on antitrust, Robert Eisenbach on bankruptcy, Rachel Thorn on dispute resolution, Natasha Leskovsek on US Food and Drug Administration regulatory and Karen Tsai on export control.

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Group Contacts

Charity Williams
Partner
San Diego
Freddy Yip
Associate
Hong Kong
Ken Rollins
Partner in Charge – San Diego
San Diego
Brett Dovman
Associate
San Diego
Jeffrey J. Tolin
Partner
New York
Amanda Pacheco
Associate
Palo Alto
Andrew Epstein
Special Counsel
Seattle
Zhijing Yu
Associate
Singapore
Christopher Kimball
Partner
Washington, DC
David Burns
Special Counsel
Washington, DC
Robert Eisenbach
Of Counsel
San Francisco
Rachel Thorn
Of counsel
New York
Natasha Leskovsek
Of Counsel
Washington, DC
Karen Tsai
Special Counsel
Washington, DC

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