Josh Seidenfeld

Partner
jseidenfeld@cooley.com
Full contact info

I represent high-growth technology and healthcare companies and their investors. I love simplifying legalese into actionable decisions for my clients.

About Josh

Josh is the global chair of Cooley’s digital health group and serves on Cooley’s Life Sciences Advisory Board. He represents life sciences, healthcare and technology clients through the full company life cycle, from seed stage through private financings, mergers & acquisitions and initial public offerings. He also regularly advises his clients on general corporate issues, securities matters and implications of proposed business transactions.

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Passions

Sports

Family

Friends

A great glass of wine

Closing transactions

Experience

Baseten Secures $150 Million Series D

Baseten Secures $150 Million Series D

September 5, 2025

Cooley advised Baseten, a company powering inference for the world’s fastest-growing artificial intelligence products, on its $150 million Series D financing, valuing the company at $2.15 billion.

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Related contacts

Josh Seidenfeld
Partner, Palo Alto
Daniel Y. Lee
Associate, Palo Alto
Alice Wu
Associate, Palo Alto
Sam Thompson
Associate, Santa Monica
Celine Koh
Associate, Palo Alto
Sharon Connaughton
Special Counsel, Washington, DC
John Sellers
Senior Counsel, Palo Alto
Kimberly Nguyen
Special Counsel, Reston
Mari Dugas
Associate, Washington, DC
Melody Van Horn
Senior Paralegal, Palo Alto
Brian Mitchell
Transactional Quantitative Analyst, San Diego

Related Practices & Industries

Emerging Companies
Artificial Intelligence
Antitrust and Competition
Technology Transactions
Tax
CFIUS
Cyber/Data/Privacy

EliseAI Secures $250 Million Series E

EliseAI Secures $250 Million Series E

August 20, 2025

Cooley advised EliseAI, an artificial intelligence company automating complex healthcare and housing systems, on the close of its $250 million Series E financing.

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Related contacts

Josh Seidenfeld
Partner, Palo Alto
Phoebe Huang
Associate, Seattle
Amanda Gonzalez Burton
Associate, New York
Sara Siddiqi
Associate, New York
Kristine Kevorkova
Associate, Santa Monica
Jasmine Hsu
Associate, Palo Alto
Keshara Senanayake
Associate, New York
Sharon Connaughton
Special Counsel, Washington, DC
David Dalton
Associate, Santa Monica
Anisha Mohin
Associate, New York
Jayne M. Munger
Associate, New York
Timothy Shapiro
Partner, Palo Alto
Michael Gladstone
Associate, New York
Joy Chow
Associate, New York
Alexis Finkelberg Bortniker
Partner, San Diego
Amanda A. Main
Partner, Palo Alto
John Sellers
Senior Counsel, Palo Alto
Kimberly Nguyen
Special Counsel, Reston
Andrew Epstein
Special Counsel, Seattle
Julie Wicklund
Special Counsel, Palo Alto
Ryan Bowers
Associate, Washington, DC
Joshua Elefant
Associate, Palo Alto
Jimmy Gilligan
Associate, Boston
Shelby Saunders
Associate, New York
Jon Turk
Senior Paralegal, Washington, DC
Chris Rhem
Paralegal Specialist, San Francisco
Brandon Lefebvre
Quantitative Analyst, Boston
Kevin Gurley
Quantitative Analyst, New York

Related Practices & Industries

Emerging Companies
Capital Markets
Tax
Fund Formation
Antitrust and Competition
Technology Transactions
Technology
Labor and Employment
Cyber/Data/Privacy
Debt Finance
Artificial Intelligence
Healthcare
Life Sciences and Healthcare Regulatory
Digital Health

Courtyard Closes $30 Million Series A

Courtyard Closes $30 Million Series A

July 24, 2025

Cooley advised Courtyard, developer of a digital collectible trading and storage platform designed for the secure exchange and management of graded physical trading cards, on its $30 million Series A financing. Josh Seidenfeld, Thomas Heiser and Rachel Robichaux led the Cooley team.

Related contacts

Josh Seidenfeld
Partner, Palo Alto
Thomas Heiser
Associate, Palo Alto
Rachel Robichaux
Associate, Palo Alto

Related Practices & Industries

Emerging Companies
Venture Capital
Fintech and Payments
Blockchain Technology and Tokenization

Andreessen Horowitz Leads Fortuna Health’s $18 Million Series A

Andreessen Horowitz Leads Fortuna Health’s $18 Million Series A

July 21, 2025

Cooley advised Andreessen Horowitz, a venture capital firm, as the lead investor in Fortuna Health’s $18 million Series A financing. Josh Seidenfeld, Thomas Heiser and Amanda Gonzalez Burton led the Cooley team advising Andreessen Horowitz.

Related contacts

Josh Seidenfeld
Partner, Palo Alto
Thomas Heiser
Associate, Palo Alto
Amanda Gonzalez Burton
Associate, New York

Related Practices & Industries

Digital Health
Healthcare
Emerging Companies
Venture Capital

Decagon Secures $131 Million Series C

Decagon Secures $131 Million Series C

June 23, 2025

Cooley advised Decagon, an innovator in conversational artificial intelligence agents for customer experience, on its $131 million Series C financing round, pushing its total funding to $231 million.

Related contacts

Josh Seidenfeld
Partner, Palo Alto
Zi Ye
Associate, Palo Alto
Yichen Liu
Associate, Palo Alto
Daniel Y. Lee
Associate, Palo Alto
John Sellers
Senior Counsel, Palo Alto
Mark Windfeld-Hansen
Senior Counsel, Palo Alto
Sharon Connaughton
Special Counsel, Washington, DC
David Dalton
Associate, Santa Monica
Christopher Suhler
Associate, Colorado
Irene Sun
Associate, Palo Alto
Melody Van Horn
Senior Paralegal, Palo Alto
Brian Mitchell
Transactional Quantitative Analyst, San Diego

Related Practices & Industries

Emerging Companies
Artificial Intelligence
Antitrust and Competition
Tax
Cyber/Data/Privacy
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California

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The State Bar of California