Announcements
Sidley Represents Sensei Biotherapeutics in Acquisition of Faeth Therapeutics
February 18, 2026
Sidley represented Sensei Biotherapeutics, Inc. (Nasdaq: SNSE), a clinical-stage biotechnology company focused on the discovery and development of next-generation therapeutics for cancer patients, in its acquisition of Faeth Therapeutics Inc., a clinical-stage biotechnology company developing multi-node therapies targeting tumor metabolism and signaling.
Concurrent with the acquisition, Sidley also represented Sensei in its definitive agreement for the sale of Series B non-voting convertible preferred stock in a private placement expected to result in gross proceeds of approximately US$200 million.
The Sidley team was led by Asher Rubin (Technology and Life Sciences Transactions), John Butler (M&A), Istvan Hajdu (Capital Markets), and Nikita Ponomarev (M&A), and included Michael Rohr, Emily Chazen, Xi Zhao, and law clerk Christine Seo (M&A); Nick DeAngelis, Sonia Gupta Barros, Kendell Lee, and Eric Carlson (Capital Markets); Adriana Tibbitts, Collin Marshall, and Kayla Nguyen (Technology and Life Sciences Transactions); Gregory Marrs, Christian Pilhofer, Ryan McLeod, and Madeline Clasen (Employee Benefits and Executive Compensation); Christian Brause and Tyler Combest (Tax); Eric Hoffman (Labor, Employment and Immigration); and IP Transactions Specialist Raza Siddiqui.
Concurrent with the acquisition, Sidley also represented Sensei in its definitive agreement for the sale of Series B non-voting convertible preferred stock in a private placement expected to result in gross proceeds of approximately US$200 million.
The Sidley team was led by Asher Rubin (Technology and Life Sciences Transactions), John Butler (M&A), Istvan Hajdu (Capital Markets), and Nikita Ponomarev (M&A), and included Michael Rohr, Emily Chazen, Xi Zhao, and law clerk Christine Seo (M&A); Nick DeAngelis, Sonia Gupta Barros, Kendell Lee, and Eric Carlson (Capital Markets); Adriana Tibbitts, Collin Marshall, and Kayla Nguyen (Technology and Life Sciences Transactions); Gregory Marrs, Christian Pilhofer, Ryan McLeod, and Madeline Clasen (Employee Benefits and Executive Compensation); Christian Brause and Tyler Combest (Tax); Eric Hoffman (Labor, Employment and Immigration); and IP Transactions Specialist Raza Siddiqui.
Capabilities
Suggested News & Insights
Sidley Represents Sino Biopharm in an Exclusive License Agreement With AstraZenecaJuly 13, 2026Legal Implications in AI Development and Deployment: Training Data and Grounding DataJuly 9, 2026Sidley Represents Abbisko Therapeutics in Its US$1.9 Billion Strategic Collaboration With Eli Lilly and Co.July 2, 2026Sidley Advises on the Hong Kong IPO of Shenzhen Senior Technology MaterialJune 23, 2026Sidley Advises HJ Science on Its Successful Chapter 18A Listing in Hong KongJune 23, 2026Life Sciences Transactions Partners Lila Hope and Jennifer Raab Join Sidley, Accelerating Further Growth in Life Sciences and the Palo Alto OfficeJune 22, 2026
- Stay Up To DateSubscribe to Sidley Publications
- Follow Sidley on Social MediaSocial Media Directory




