I help manage human capital. My job is to help make effective decisions during the employment life cycle and to resolve disputes arising from employment relationships.

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Experience

Araris Biotech’s up to $1.14 Billion Acquisition by Taiho Pharmaceutical

March 17, 2025

Cooley advised Araris Biotech, a Swiss biotechnology company developing next-generation antibody-drug conjugates, on its definitive agreement to be acquired by Japan-based Taiho Pharmaceutical for up to $1.14 billion in cash.

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Related contacts

Bill Roegge
Partner, New York
Kenneth Krisko
Partner, Reston
Simon Amies
Partner, London
Rita Sobral
Special Counsel, London
Stephanie Parker Palmer
Special Counsel, Reston
Michael Bergmann
Partner, Washington, DC
Brandon W. Fenn
Partner, New York
Eileen Marshall
Partner, Washington, DC
Jeremy Morrison
Partner, Washington, DC
Dr. Matthew Pavao
Partner, Boston
Stella Sarma
Partner, Brussels
Ryan Vann
Partner, Chicago
Natasha Leskovsek
Of Counsel, Washington, DC
Elizabeth Caruso
Associate, New York
Matthew Choy
Associate, New York
Kyle Hess
Associate, New York
Katie Kaufman
Associate, Boston
Edward (Teddy) Nimetz
Associate, New York
Alexandra Paterson
Associate, London
Joseph Perry
Associate, Reston
Dr. Robert E. Powers
Associate, Boston
María Álvarez Requejo Heredero
Associate, Brussels

Related Practices & Industries

Cooley Advises Special Committee of Checkpoint on Acquisition by Sun Pharma

March 9, 2025

Cooley advised the special committee of Checkpoint Therapeutics’ (Nasdaq: CKPT) board of directors in connection with Checkpoint’s definitive agreement to be acquired by Sun Pharmaceutical Industries (NSE: SUNPHARMA) for up to $416 million in cash and contingent value rights.

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Related contacts

Bill Roegge
Partner, New York
Kevin Cooper
Partner, New York
Marc Recht
Partner, Boston
Wesley Dietrich
Associate, Washington, DC
Katie Benvenuti
Associate, New York
Michael Bergmann
Partner, Washington, DC
Eileen Marshall
Partner, Washington, DC
Alan W. Tamarelli
Partner, New York
Julia R. Brinton
Special Counsel, Washington, DC
Kristopher Kleiner
Special Counsel, Colorado
Rebecca Ross
Special Counsel, Washington, DC
Stella Sarma
Partner, Brussels
Natasha Leskovsek
Of Counsel, Washington, DC
Karun Ahuja
Special Counsel, Chicago
Elizabeth Caruso
Associate, New York
Matthew Choy
Associate, New York
Jameson Davis
Associate, Boston
Kyle Hess
Associate, New York
Allison Kutner
Associate, New York
Breanna Qin
Associate, Palo Alto
Arda Can Tekin
Associate, New York
Ryan Vann
Partner, Chicago

Related Practices & Industries

Egnyte Announces Majority Investment From GI Partners and TA Associates

February 25, 2025

Cooley advised Egnyte, a provider of secure content collaboration and governance solutions, on its strategic growth investment from GI Partners and TA Associates.

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Related contacts

Eric Jensen
Senior Counsel, Palo Alto
Sepideh Mousakhani
Partner, Palo Alto
Anne Lieberman
Partner, Santa Monica
Steve Tonsfeldt
Partner, Palo Alto
Kealan Santistevan
Associate, Palo Alto
Sangitha Palaniappa
Associate, Palo Alto
Michael Bergmann
Partner, Washington, DC
Brett De Jarnette
Partner, Palo Alto
Patrick Flanagan
Partner, New York
Todd Gluth
Partner, San Diego
Tracy Rubin
Partner, Palo Alto
Stella Sarma
Partner, Brussels
Timothy Shapiro
Partner, Palo Alto
David Silverman
Partner, New York
Ryan Vann
Partner, Chicago
Summer Wynn
Partner, San Diego
Howard Morse
Senior Counsel, Washington, DC
Sharon Connaughton
Special Counsel, Washington, DC
Kristopher Kleiner
Special Counsel, Colorado
Rebecca Ross
Special Counsel, Washington, DC
Karen Tsai
Special Counsel, Washington, DC
Nathan Alamillo
Associate, Santa Monica
Caitlin Breitenbruck
Associate, Seattle
Norma Chayo Dichi
Associate, Washington, DC
Queenie Chen
Associate, Palo Alto
Nikki Chang DiFederico
Associate, Palo Alto
Megan Drill
Associate, San Diego
Jeremy M. Exelbert
Associate, New York
Nathaniel Hearn Jr.
Associate, Chicago
Vicky Kandabarow
Associate, Washington, DC
Nicollette R. Kirby
Associate, Washington, DC
Allison Kutner
Associate, New York
Alexandra Leavy
Associate, New York
Emily Lee
Associate, Palo Alto
Narmada Murugan
Associate, Palo Alto
Michael Pelle
Associate, New York
Katie Stevens
Associate, Palo Alto
Rubin Waranch
Associate, Colorado
Kevin Gurley
Quantitative Analyst, New York
Brian Mitchell
Transactional Quantitative Analyst, San Diego

Related Practices & Industries

MongoDB Announces Acquisition of Voyage AI

February 24, 2025

Cooley advised MongoDB (Nasdaq: MDB), a leading database for modern applications, on its acquisition of Voyage AI, a pioneer in state-of-the-art embedding and reranking models that power next-generation artificial intelligence applications.

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Related contacts

Kevin Cooper
Partner, New York
Christine Tse
Associate, New York
Thomas Connors
Partner, Boston
Annie Froehlich
Partner, Washington, DC
Barbara Mirza
Partner, Santa Monica
Phil Mitchell
Partner, New York
John Paul Oleksiuk
Partner, New York
Miriam Petrillo
Partner, Chicago
Jonathan Rivinus
Partner, Colorado
Ryan Vann
Partner, Chicago
Mark Windfeld-Hansen
Senior Counsel, Palo Alto
Sharon Connaughton
Special Counsel, Washington, DC
Reid Hooper
Special Counsel, Washington, DC
Kristopher Kleiner
Special Counsel, Colorado
Dillon Martinson
Special Counsel, Washington, DC
Megan Drill
Associate, San Diego
Jimmy Gilligan
Associate, Boston
Liza Hadley
Associate, Boston
Wyatt Kernell
Associate, Colorado
Allison Kutner
Associate, New York
Caolinn Mejza
Associate, New York
Lois NaYeon Yoo
Associate, New York
Leanne Andrepont
Senior Trademark Paralegal
Jake Ironfield
Transactional Quantitative Analyst, New York

Related Practices & Industries

Tempus Announces $600 Million Acquisition of Ambry Genetics

November 4, 2024

Cooley advised Tempus AI (Nasdaq: TEM), a technology company advancing precision medicine through the practical application of artificial intelligence in healthcare, on its agreement to acquire Ambry Genetics, a company focusing on genetic testing that aims to improve health by understanding the relationship between genetics and disease.

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Related contacts

Erin J. Kirchner
Partner, Chicago
Richard E. Ginsberg
Partner, Chicago
Christina T. Roupas
Partner in Charge – Chicago, Chicago
Courtney M.W. Tygesson
Partner, Chicago
Michael Tollini
Partner, Washington, DC
Lindsey O'Crump
Associate, Washington, DC
Addison Pierce
Partner, Chicago
Ariane A. Andrade
Partner, Chicago
Steve Flores
Partner, Chicago
Todd Gluth
Partner, San Diego
Christopher Kimball
Partner, Washington, DC
Phil Mitchell
Partner, New York
Howard Morse
Senior Counsel, Washington, DC
Sonia Nath
Partner, Washington, DC
Nyron J. Persaud
Partner, New York
Aaron Pomeroy
Partner, Colorado
Dr. Madhuri Roy
Partner, Palo Alto
Michelle Garcia Schulman
Partner, Reston
Rachel Thorn
Of counsel, New York
Ryan Vann
Partner, Chicago
Susan Piascik Christoff
Special Counsel, Washington, DC
Son Nguyen
Special Counsel, Washington, DC
Randy Sabett
Special Counsel, Washington, DC
Stella Sarma
Partner, Brussels
Grant Schweikert
Special Counsel, Washington, DC
Karen Tsai
Special Counsel, Washington, DC
Xander Lee
Partner, Santa Monica
Mateus Kaba Aboud
Associate, Chicago
Karun Ahuja
Special Counsel, Chicago
Tiffany Allen
Associate, Palo Alto
Elizabeth Caruso
Associate, New York
Umer Chaudhry
Associate, Washington, DC
Adrienne Beaudoin Deshmukh
Associate, Reston
Mari Dugas
Associate, Washington, DC
Carly E. Gibbons
Associate, Chicago
Jose Luis Gonzalez
Associate, Palo Alto
Charles Haley
Partner, Palo Alto
Kelley Harrington
Associate, Chicago
Nathaniel Hearn Jr.
Associate, Chicago
Kyle Hess
Associate, New York
Cameron Irwin
Associate, Chicago
Rick Jantz
Associate, Santa Monica
Patrick O. Johnson
Associate, Boston
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Meet Ryan Vann

Admissions and credentials

Illinois

Rankings and accolades

Chambers USA: Labor & Employment – Illinois (2021 – 2024)

Legal 500: Labor & Employment

Illinois Super Lawyers

He is an excellent lawyer with good vision on the market risks and issues.

Chambers USA

Ryan is truly exceptional. He is incredibly responsive, practical and very helpful in discussing very difficult things.

Chambers USA