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StubHub Announces $800 Million IPO

September 18, 2025

Cooley advised the underwriters of StubHub Holdings, a global secondary ticketing marketplace for live events, in connection with StubHub’s $800 million initial public offering (IPO).

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Related contacts

David Peinsipp
Partner, San Francisco
Kristin VanderPas
Partner, San Francisco
Denny Won
Partner, San Francisco
Shannon Eagan
Partner in Charge – Palo Alto, Palo Alto
Adam Fleisher
Partner, Washington, DC
Charlie Kim
Partner, San Diego
Kevin King
Partner, Washington, DC
Xander Lee
Partner, Santa Monica
James Maton
Co-Partner in Charge – London, London
Barbara Mirza
Partner, Santa Monica
John Paul Oleksiuk
Partner, New York
Obrea Poindexter
Partner, Washington, DC
Francis Wheeler
Senior Counsel, Colorado
Chris Chynoweth
Special Counsel, New York
Sharon Connaughton
Special Counsel, Washington, DC
David Hopkins
Special Counsel, Colorado
Andrew Linch
Special Counsel, London
Kimberly Nguyen
Special Counsel, Reston
Randy Sabett
Special Counsel, Washington, DC
Karen Tsai
Special Counsel, Washington, DC
Peter Burns
Of Counsel, Palo Alto
Chelsea André
Associate, Colorado
Jasmine A. Banks
Associate, Washington, DC
Peter A. Haddad
Associate, San Diego
David D. Kim
Associate, San Francisco
Dana N. Levin
Associate, New York
Isabelle Mackesey
Associate, Reston
Liz Paisner
Associate, New York
Erica Russell
Associate, San Francisco
Valerie Sapozhnikova
Associate, Los Angeles
Patrick Sharma
Associate, Santa Monica
Ryan Sim
Associate, San Francisco
Arda Can Tekin
Associate, London
Lawrence Traylor
Associate, Santa Monica
Genevieve Lim Urban
Associate, Seattle
Veronica Cortes
Paralegal Specialist, New York
Melissa Eskola
Paralegal Specialist, Reston
Margie Murphy
Paralegal Specialist, New York
Douglas Lyles
Senior Research Services & Access Analyst

Related Practices & Industries

Heartflow Announces $364.2 Million Upsized IPO

August 11, 2025

Cooley advised the underwriters of Heartflow, a leader in artificial intelligence technology for coronary artery disease, in connection with Heartflow’s $364.2 million upsized initial public offering.

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Related contacts

David Peinsipp
Partner, San Francisco
Kristin VanderPas
Partner, San Francisco
Charlie Kim
Partner, San Diego
Denny Won
Partner, San Francisco
Natasha Leskovsek
Of Counsel, Washington, DC
Phil Mitchell
Partner, New York
Eric Greig
Partner, Washington, DC
Joanna Liebes Hubberts
Partner, San Diego
Dr. Madhuri Roy
Partner, Palo Alto
Rebecca Ross
Special Counsel, Washington, DC
Barbara Mirza
Partner, Santa Monica
Xander Lee
Partner, Santa Monica
Jane Adams
Partner, San Diego
Annie Froehlich
Partner, Washington, DC
Kevin King
Partner, Washington, DC
Francis Wheeler
Senior Counsel, Colorado
Jessica Koffel
Special Counsel, Brussels
Dillon Martinson
Special Counsel, Washington, DC
Randy Sabett
Special Counsel, Washington, DC
Karen Tsai
Special Counsel, Washington, DC
Max Gonzalez
Associate, Palo Alto
Peter A. Haddad
Associate, San Diego
Wyatt Kernell
Associate, Colorado
Allison Kutner
Associate, New York
Ryan Lewis
Associate, Colorado
Tyler Saavedra-Buckley
Associate, San Francisco
Valerie Sapozhnikova
Associate, Los Angeles

Related Practices & Industries

Shoulder Innovations Announces $75 Million IPO

July 31, 2025

Cooley advised the underwriters of Shoulder Innovations, a medical technology company exclusively focused on transforming the shoulder surgical care market, in connection with Shoulder Innovations’ $75 million initial public offering (IPO).

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Related contacts

Denny Won
Partner, San Francisco
Charlie Kim
Partner, San Diego
Kristin VanderPas
Partner, San Francisco
David Peinsipp
Partner, San Francisco
Xander Lee
Partner, Santa Monica
Barbara Mirza
Partner, Santa Monica
Phil Mitchell
Partner, New York
Scott Weston
Partner, Boston
Kassity L. Mai
Special Counsel, Reston
Randy Sabett
Special Counsel, Washington, DC
Karen Tsai
Special Counsel, Washington, DC
Valerie Sapozhnikova
Associate, Los Angeles
Alex Hammer
Associate, San Francisco
Allison Kutner
Associate, New York
Sunny J. Levine
Associate, Colorado
Ryan Lewis
Associate, Colorado
Sarah Miller
Associate, New York
Marjorie O'Neill
Associate, San Francisco
Amanda Pacheco
Associate, Palo Alto

Related Practices & Industries

Aardvark Therapeutics Announces $94.2 Million IPO

February 14, 2025

Cooley advised the underwriters of Aardvark Therapeutics, a phase 3 biotech company developing novel small-molecule therapies for metabolic diseases, in connection with Aardvark’s $94.2 million initial public offering (IPO).

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Related contacts

Charlie Kim
Partner, San Diego
Kristin VanderPas
Partner, San Francisco
Denny Won
Partner, San Francisco
Jean Park
Partner, New York
Christine Turner
Associate, Colorado
Ryan Lewis
Associate, Colorado
Joanna Zhang
Associate, San Diego
Lila Hope
Partner, Palo Alto
Xander Lee
Partner, Santa Monica
Phil Mitchell
Partner, New York
Alessandra Murata
Partner, Palo Alto
Randy Sabett
Special Counsel, Washington, DC
Karen Tsai
Special Counsel, Washington, DC
Natasha Leskovsek
Of Counsel, Washington, DC
Zack Gong
Associate, Shanghai
Tony P. Guan
Associate, Santa Monica
Sarah Miller
Associate, New York

Related Practices & Industries

SiteOne Therapeutics Announces $100 Million Series C

December 18, 2024

Cooley advised SiteOne Therapeutics, a biopharmaceutical company developing selective ion channel modulators for the treatment of pain, cough and other conditions, on its $100 million Series C financing.

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Related contacts

Laura Berezin
Partner, Seattle
Sara Semnani
Partner, Santa Monica
Noel Ripberger-Scheick
Associate, Palo Alto
Annie Froehlich
Partner, Washington, DC
Christopher Kimball
Partner, Washington, DC
Tracy Rubin
Partner, Palo Alto
John Sellers
Senior Counsel, Palo Alto
Denny Won
Partner, San Francisco
Kimberly Nguyen
Special Counsel, Reston
Kristin O'Hanlon
Special Counsel, San Francisco
Randy Sabett
Special Counsel, Washington, DC
Karen Tsai
Special Counsel, Washington, DC
Natasha Leskovsek
Of Counsel, Washington, DC
Michelle Liskanich
Associate, Santa Monica
Michael Gladstone
Associate, New York
Sarah Oliai
Associate, Washington, DC
Melody Van Horn
Senior Paralegal, Palo Alto
Katie Kissner
Quantitative Analyst, San Francisco

Related Practices & Industries

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He has unbelievable firepower and work ethic. Denny is a fantastic partner.

Chambers USA, 2024

Denny is creative, thoughtful and has taken it to the next level in a senior role.

Chambers USA, 2025

Admissions and credentials

California

New York

Rankings and accolades

The Legal 500 US: Capital Markets: Equity Offerings (2025)

Chambers USA: Capital Markets: Debt & Equity – California (2024 – 2025)

Chambers USA: Capital Markets: Debt & Equity: Western United States – Nationwide (2024 – 2025)

Chambers USA: Up and Coming for Capital Markets: Debt & Equity – California (2023)

Chambers USA: Up and Coming for Capital Markets: Debt & Equity: Western United States – Nationwide (2023)

Chambers USA: Associate to Watch for Capital Markets: Debt & Equity – California (2021 – 2022)

Chambers USA: Associate to Watch for Capital Markets: Debt & Equity: Western United States – Nationwide (2021 – 2022)

Memberships and affiliations

New York State Bar Association

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