Thomas Welk

Senior Counsel
Full contact info

Experience

Ionis – $500.3 Million Public Offering of Common Stock

September 11, 2024

Cooley advised Ionis Pharmaceuticals (Nasdaq: IONS), a biotechnology research company inventing medicines that bring better futures to people with serious diseases, on its $500.3 million underwritten public offering of common stock.

Read more

Related contacts

Charlie Kim
Partner, San Diego
Natalie Karam
Partner, Palo Alto
Nicholaus E. Johnson
Associate, San Diego
Jayden Martinez
Associate, Colorado
Allie Pilmer
Associate, San Diego
Dr. Jon Cousin
Partner, Washington, DC
Todd Gluth
Partner, San Diego
Phil Mitchell
Partner, New York
David Navetta
Partner, Colorado
Jason Savich
Partner, San Francisco
Alan W. Tamarelli
Partner, New York
Thomas Welk
Senior Counsel, San Diego
Francis Wheeler
Partner, Colorado
Mark Windfeld-Hansen
Senior Counsel, Palo Alto
Karen Tsai
Special Counsel, Washington, DC
Natasha Leskovsek
Of Counsel, Washington, DC
David Dalton
Associate, Santa Monica
Erin Hilliard
Associate, San Francisco
Jesse Schulman
Associate, Colorado

Related Practices & Industries

ARCH Venture Partners Co-Leads Xaira Therapeutics $1 Billion Series A Funding

April 24, 2024

Cooley advised ARCH Venture Partners, which co-led a $1 billion Series A funding round in Xaira Therapeutics. Partners Colleen Badgley, Danielle Naftulin and Dave Peinsipp led the Cooley team advising ARCH, a venture capital firm catalyzing discoveries that prevent, detect and cure disease.

Related contacts

David Peinsipp
Partner, San Francisco
Colleen Badgley
Partner, Seattle
Danielle Naftulin
Partner, Palo Alto
Willy Cowles
Associate, Seattle
Dr. Bill Christiansen
Partner, Seattle
Dr. Tian Yong Zheng
Patent Agent, Seattle
Chen Chen
Associate, Palo Alto
Bin Wang
Special Counsel, Palo Alto
Zack Gong
Associate, Shanghai
Tom James
Associate, San Francisco
Thomas Welk
Senior Counsel, San Diego
Carly Robinson
Associate, Reston
Sharon Connaughton
Special Counsel, Washington, DC
Elizabeth M. Morrison
Associate, Boston

Related Practices & Industries

ACELYRIN Announces Pricing of Upsized Initial Public Offering

May 15, 2023

Cooley advised Acelyrin, INC., a late-stage biopharmaceutical company, in its $621 million initial public offering, the second-largest biotechnology IPO and largest clinical-stage biotechnology IPO ever.

Read more

Related contacts

Chadwick Mills
Partner, San Francisco
Charlie Kim
Partner, San Diego
Anitha Anne
Associate, San Francisco
Barbara Mirza
Partner, Santa Monica
Xander Lee
Partner, Santa Monica
Joshua Mates
Partner, San Francisco
Phil Mitchell
Partner, New York
Brad Goldberg
Partner, New York
Peter Adams
Partner, San Diego
Lauren Creel
Partner, Palo Alto
Koji Fukumura
Partner, San Diego
Patrick Gibbs
Partner, Palo Alto
David Peinsipp
Partner, San Francisco
Barbara Borden
Partner, San Diego
David Navetta
Partner, Colorado
Patrick Van Eecke
Partner, Brussels
Shannon Eagan
Partner in Charge – Palo Alto, Palo Alto
Darren DeStefano
Partner, Reston
Francis Wheeler
Partner, Colorado
Thomas Welk
Senior Counsel, San Diego
Natasha Leskovsek
Of Counsel, Washington, DC
Dani Nazemian
Special Counsel, San Diego
Karen Tsai
Special Counsel, Washington, DC
Miriam Petrillo
Partner, Chicago
Andrew Nelms
Associate, San Francisco
David D. Kim
Associate, San Francisco
Lawrence Traylor
Associate, Santa Monica
Dionne A. Thomas
Associate, San Diego
Nathaniel Hearn Jr.
Associate, Chicago
Valerie Sapozhnikova
Associate, Los Angeles
Eileen Leman
Associate, Los Angeles
Kelly McCormick
Associate, San Francisco
Mor Agam
Associate, New York
Allison Kutner
Associate, New York
Madison (JJ) Meng
Associate, San Francisco
Rebecca Siegel
Associate, San Francisco
Rachel F. Katz
Associate, New York
Mari Dugas
Associate, Washington, DC
Megan Drill
Associate, San Diego
Amanda Pacheco
Associate, Palo Alto
Kristin R. Marshall
Associate, Washington, DC
John T. Stellini
Associate, Palo Alto

Related Practices & Industries

Structure Therapeutics – $185.3 Million IPO

February 9, 2023

San Francisco – February 9, 2023 Cooley advised Structure Therapeutics, a clinical-stage global biopharmaceutical company, on its $185.3 million initial public offering, including the full exercise of the underwriters’ option to purchase additional American depositary shares. Lawyers Charlie Kim, Patrick Loofbourrow, Andrew Harline and Su Lian Lu led the Cooley team.

The offering marks the first sizable US life sciences IPO this year. Structure Therapeutics will use the proceeds to develop new oral therapies for the treatment of various diseases, including those impacting the metabolic, cardiovascular and pulmonary systems. Its lead product candidate targets Type 2 diabetes and obesity.

Structure Therapeutics aims to develop and deliver novel oral therapeutics to treat a wide range of chronic diseases with unmet medical needs. Its differentiated technology platform leverages structure-based drug discovery and computational chemistry expertise, enabling it to build a pipeline of product candidates. The company currently focuses on G-protein-coupled receptors as a therapeutic target class.

About Cooley LLP

Clients partner with Cooley on transformative deals, complex IP and regulatory matters, and high-stakes litigation, where innovation meets the law.

Cooley has nearly 1,400 lawyers across 18 offices in the United States, Asia and Europe, and a total workforce of more than 3,000.

Related contacts

Charlie Kim
Partner, San Diego
Patrick Loofbourrow
Partner, Singapore
Andrew Harline
Partner in Charge – Singapore, Singapore
Su Lian Lu
Special Counsel, Santa Monica
Xander Lee
Partner, Santa Monica
Jie Zhang
Partner, Hong Kong
Phil Mitchell
Partner, New York
Aaron Pomeroy
Partner, Colorado
Carlos Ramirez
Partner, San Diego
Ryan Blair
Partner, San Diego
Joshua Mates
Partner, San Francisco
Mark Ballantyne
Partner, Reston
Nicola Squire
Partner, London
Francis Wheeler
Partner, Colorado
Will Cai
Partner, Hong Kong
Thomas Welk
Senior Counsel, San Diego
Natasha Leskovsek
Of Counsel, Washington, DC
Dani Nazemian
Special Counsel, San Diego
Randy Sabett
Special Counsel, Washington, DC
Bin Wang
Special Counsel, Palo Alto
Rebecca Ross
Special Counsel, Washington, DC
Lisa Yuan
Special Counsel, Beijing
Christine Turner
Associate, Colorado
Vince Flynn
Associate, San Diego
Ivy Wang
Associate, Shanghai
Rick Jantz
Associate, Santa Monica
Cara Buchicchio
Associate, New York
Megan Drill
Associate, San Diego
Daniel Gillon
Associate, San Diego
Dionne A. Thomas
Associate, San Diego
Cristina Ferruolo
Associate, San Diego
Brian Lau
Associate, Hong Kong
Jessica Wade
Paralegal Specialist, San Diego
Kate Walther
Paralegal Specialist, San Diego
Lunga Su
Associate, Shanghai
Christine S. Kim
Associate, San Diego
Andy Zachrich
Associate, San Diego

Related Practices & Industries

Oyster Point Pharma to Be Acquired by Viatris

November 10, 2022

Cooley advised Oyster Point Pharma, a top ophthalmology-focused biopharmaceutical company, on its definitive agreement to be acquired by global healthcare company Viatris. Partners Mika Reiner Mayer, Brandon Fenn, Div Gupta and Ian Nussbaum led the Cooley team advising Oyster Point Pharma.

Read more

Related contacts

Mika Reiner Mayer
Partner, Palo Alto
Brandon W. Fenn
Partner, New York
Div Gupta
Partner, New York
Sarah Lightdale
Partner, New York
Eileen Marshall
Partner, Washington, DC
Howard Morse
Partner, Washington, DC
John Paul Oleksiuk
Partner, New York
Nyron J. Persaud
Partner, New York
John Robertson
Partner, Seattle
Charity Williams
Partner, San Diego
Natasha Leskovsek
Of Counsel, Washington, DC
Ryan Montgomery
Special Counsel, Boston
Thomas Welk
Senior Counsel, San Diego
Nathan Baum
Associate, New York
Kimberly Bolin
Patent Agent, Palo Alto
Julia R. Brinton
Associate, Washington, DC
Cara Buchicchio
Associate, New York
Colette Ghazarian
Associate, Los Angeles
Liz Gold
Associate, New York
Amanda Griggs
Associate, New York
Edward (Teddy) Nimetz
Associate, New York

Related Practices & Industries

View more

Admissions and credentials

California

Memberships and affiliations

American Bar Association (ABA)

National Association of Stock Plan Professionals

San Diego County Bar Association