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Y-mAbs Therapeutics Agrees to Acquisition by SERB Pharmaceuticals

August 5, 2025

Cooley advised Y-mAbs Therapeutics, a commercial-stage biopharmaceutical company focused on the development and commercialization of antibody-based therapeutics for the treatment of cancer, on its definitive merger agreement with SERB Pharmaceuticals. Under the agreement, SERB will acquire Y-mAbs, including its lead commercial oncology asset, DANYELZA, in an all-cash transaction representing an equity value of approximately $412 million.

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Related contacts

Bill Sorabella
Partner, New York
Bill Roegge
Partner, New York
Div Gupta
Partner, New York
Sarah Sellers
Partner, New York
Christophe Beauduin
Partner, New York
Megan Browdie
Partner, Washington, DC
Brad Goldberg
Partner, New York
Christopher Kimball
Partner, Washington, DC
Eileen Marshall
Partner, Washington, DC
Darah Protas
Partner, Washington, DC
Natasha Leskovsek
Of Counsel, Washington, DC
Julia Kim
Special Counsel, New York
Justin Kisner
Special Counsel, San Diego
MaryBeth Shreiner
Special Counsel, Reston
Karen Tsai
Special Counsel, Washington, DC
Amanda Weiss
Special Counsel, New York
Rajdeep Roger Bains
Associate, San Diego
Dayne Brown
Associate, New York
Norma Chayo Dichi
Associate, Washington, DC
Sharon Davidov
Associate, New York
Athina Gaki
Associate, Brussels
Kyle Hess
Associate, New York
Katie Kaufman
Associate, Boston
Nicollette R. Kirby
Associate, Washington, DC
Christopher Nickas
Associate, New York
Arda Can Tekin
Associate, New York
Shaun (Tianjie) Wang
Associate, New York

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Rillet Secures $25 Million Series A

May 28, 2025

Cooley advised Rillet, an artificial intelligence-native enterprise resource planning platform, on its $25 million Series A financing round.

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Related contacts

Josh Seidenfeld
Partner, Palo Alto
Shaun (Tianjie) Wang
Associate, New York
Carly J. Goeman
Associate, New York
Danielle Gershowitz
Partner, New York
Jim Fulton
Partner, New York
Bryan Berman
Special Counsel, Colorado
Karen Tsai
Special Counsel, Washington, DC
Elaine Huang
Associate, Palo Alto
Calvin Lee
Associate, New York
Sarah Oliai
Associate, Washington, DC
Megan Boss
Senior Paralegal , Boston
Jake Ironfield
Transactional Quantitative Analyst, New York
Brian Mitchell
Transactional Quantitative Analyst, San Diego

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Feedzai Acquires Demyst

April 22, 2025

Cooley advised Feedzai, a global leader in fraud and financial crime prevention, on its acquisition of Demyst, including Demyst’s Zonic data workflow orchestration platform, intellectual property and sophisticated data-integration capabilities.

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Related contacts

Rita Sobral
Special Counsel, London
Kevin Cooper
Partner, New York
Megan Browdie
Partner, Washington, DC
Thomas Connors
Partner, Boston
Annie Froehlich
Partner, Washington, DC
Guadalupe Sampedro
Partner, London
Stella Sarma
Partner, Brussels
Jeffrey J. Tolin
Partner, New York
Ryan Vann
Partner, Chicago
Julia R. Brinton
Special Counsel, Washington, DC
David Hopkins
Special Counsel, Colorado
Kathryn Benvenuti
Associate, New York
Ryan Bowers
Associate, Washington, DC
Athina Gaki
Associate, Brussels
Carly E. Gibbons
Associate, Chicago
Jimmy Gilligan
Associate, Boston
Michael Gladstone
Associate, New York
Eileen Leman
Associate, Los Angeles
Shante Mays
Associate, Reston
Daniel Millard
Associate, London
Shaun (Tianjie) Wang
Associate, New York
Leanne Andrepont
Senior Trademark Paralegal
Patricia Myers
Paralegal Specialist, Colorado

Alumis Announces Merger With ACELYRIN

February 6, 2025

Cooley advised Alumis (Nasdaq: ALMS), a clinical-stage biopharmaceutical company developing therapies using a precision approach to optimize clinical outcomes and significantly improve the lives of patients with immune-mediated diseases, on its definitive agreement with ACELYRIN to merge in an all-stock transaction.

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Related contacts

Jamie Leigh
Partner, San Francisco
David Peinsipp
Partner, San Francisco
Ben Beerle
Partner, San Francisco
Kristin VanderPas
Partner, San Francisco
Polina A. Demina
Special Counsel, New York
Sangitha Palaniappa
Associate, Palo Alto
Christine Turner
Associate, Colorado
Shaun (Tianjie) Wang
Associate, New York
Megan Browdie
Partner, Washington, DC
Lauren Creel
Partner, Palo Alto
Ross Eberly
Partner, Santa Monica
Stephanie Gentile
Partner, New York
Sarah Lightdale
Partner, New York
Phil Mitchell
Partner, New York
Jeremy Morrison
Partner, Washington, DC
Alessandra Murata
Partner, Palo Alto
Jennifer Raab
Partner, Palo Alto
Patrick Van Eecke
Partner, Brussels
Natasha Leskovsek
Of Counsel, Washington, DC
Julia R. Brinton
Special Counsel, Washington, DC
Andrew Epstein
Special Counsel, Seattle
Caroline Vu
Special Counsel, Palo Alto
Christopher Andrews
Associate, New York
Dannielle Antone
Associate, San Francisco
Tamara Chin Loy
Associate, Washington, DC
Navya Dasari
Associate, New York
Joshua Elefant
Associate, Palo Alto
Winda Fung
Associate, Santa Monica
Wyatt Kernell
Associate, Colorado
Kristina Krasnikova
Associate, Palo Alto
Sunny J. Levine
Associate, Colorado
Amanda Lindner
Associate, New York
Jayne M. Munger
Associate, New York
Julianne Orr
Associate, San Francisco
Michael Pelle
Associate, New York
Breanna Qin
Associate, Palo Alto
Bartholomäus Regenhardt
Associate, Brussels
Jesse Schulman
Associate, Colorado
Freddy Yip
Associate, Hong Kong
Isabella Ysebrands
Associate, San Francisco

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H1 Acquires Ribbon Health

January 8, 2025

Cooley advised H1, a global healthcare data technology company, on its acquisition of Ribbon Health.

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Related contacts

Jeff Laretto
Partner, New York
Garth Angelo Osterman
Partner, San Francisco
Nathan Baum
Special Counsel, New York
Stephanie Gentile
Partner, New York
Ryan Montgomery
Partner, Boston
Sarah Buchik
Associate, New York
Sela Dougherty
Associate, Miami
Shaun (Tianjie) Wang
Associate, New York
Megan Browdie
Partner, Washington, DC
Patrick Flanagan
Partner, New York
Michael Klein
Partner, New York
Len Jacoby
Partner, New York
Kristen Mathews
Partner, New York
Phil Mitchell
Partner, New York
Gerard O'Shea
Partner, New York
Mark Windfeld-Hansen
Senior Counsel, Palo Alto
Stacey A. Bradford
Special Counsel, Washington, DC
Julia R. Brinton
Special Counsel, Washington, DC
Sharon Davidov
Associate, New York
Jeremy M. Exelbert
Associate, New York
Michael Gladstone
Associate, New York
Sunny J. Levine
Associate, Colorado
Amanda Pacheco
Associate, Palo Alto
Liz Paisner
Associate, New York
Katharina Schwarz
Associate, New York
Robert Warshaw
Associate, New York
Leanne Andrepont
Senior Trademark Paralegal
Patricia Myers
Paralegal Specialist, Colorado

Related Practices & Industries

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New York State Bar Association