Garth Angelo Osterman

Partner
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I have been representing clients in mergers and acquisitions for almost 20 years, across a broad spectrum of industries, with a specialty in international and cross-border transactions.

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Cooley Advises io Products on $6.5 Billion Acquisition by OpenAI

May 29, 2025

Cooley advised io Products, an engineering and product manufacturing company co-founded by Jony Ive to develop, engineer and manufacture a new family of products for the artificial general intelligence era, on its approximately $6.5 billion acquisition by OpenAI. As part of the deal, Ive and his creative collective, LoveFrom, will assume deep design and creative responsibilities across OpenAI. 

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Adam Ruttenberg
Partner, Washington, DC
Craig Jacoby
Partner, San Francisco
Garth Angelo Osterman
Partner, San Francisco
Nick Davis
Partner in Charge – Seattle, Seattle
Caitlin Breitenbruck
Associate, Seattle
Sangitha Palaniappa
Associate, Palo Alto
Jamin Agosti
Associate, San Francisco
Meera Patel
Associate, San Francisco
Jonathan Rivinus
Partner, Colorado
Ryan Montgomery
Partner, Boston
Steve Flores
Partner, Chicago
Joshua Mates
Partner, San Francisco
Barbara Mirza
Partner, Santa Monica
Jeremy Morrison
Partner, Washington, DC
Mark Windfeld-Hansen
Senior Counsel, Palo Alto
Karun Ahuja
Special Counsel, Chicago
Sharon Connaughton
Special Counsel, Washington, DC
Jeff Goldman
Special Counsel, Palo Alto
Karen Tsai
Special Counsel, Washington, DC
Christopher B. Durbin
Of Counsel, Seattle
Blake Martell
Of counsel, San Francisco
Ryan Bowers
Associate, Washington, DC
David Dalton
Associate, Santa Monica
Sharon Davidov
Associate, New York
Alexander Ellebracht
Associate, Palo Alto
Michael Gladstone
Associate, New York
Michael Gladstone
Associate, New York
Elaine Huang
Associate, Palo Alto
Bomin Kim
Associate, New York
Jessica Li
Associate, Palo Alto
Anne Luquette
Associate, San Francisco
Sarah Oliai
Associate, Washington, DC
Breanna Qin
Associate, Palo Alto
Rubin Waranch
Associate, Colorado
Katie Kissner
Quantitative Analyst, San Francisco
Brandon Lefebvre
Quantitative Analyst, Boston

Related Practices & Industries

Red Canary Announces Acquisition by Zscaler

May 27, 2025

Cooley advised Red Canary, a top managed detection and response platform that investigate threats while streamlining workflows through automated remediation, on its acquisition by Zscaler (Nasdaq: ZS).

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Garth Angelo Osterman
Partner, San Francisco
Ben Beerle
Partner, San Francisco
Jonathan Rivinus
Partner, Colorado
Tracy Rubin
Partner, Palo Alto
Natalie D. Vernon
Associate, Colorado
Kurtis Zinger
Associate, Colorado
Michael Pelle
Associate, New York
Patrick Johnson
Director of Marketing – Litigation, Chicago
Josh Himmelstern
Associate, San Diego
Jessica Li
Associate, Palo Alto
Ross Eberly
Partner, Santa Monica
Kevin King
Partner, Washington, DC
Kristen Mathews
Partner, New York
Michael McMahon
Partner, Boston
Barbara Mirza
Partner, Santa Monica
Jeremy Morrison
Partner, Washington, DC
Adam Ruttenberg
Partner, Washington, DC
Robert Jacques
Special Counsel, Washington, DC
Mark Windfeld-Hansen
Senior Counsel, Palo Alto
Karen Tsai
Special Counsel, Washington, DC
Rachel Thorn
Of counsel, New York
Alexander Ellebracht
Associate, Palo Alto
Lanny E. Holstein
Associate, Colorado
Katie Kaufman
Associate, Boston
Allison Kutner
Associate, New York
Eileen Leman
Associate, Los Angeles
Edward (Teddy) Nimetz
Associate, New York
Patricia Myers
Paralegal Specialist, Colorado
Brandon Lefebvre
Quantitative Analyst, Boston

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Machinify Announces Acquisition by New Mountain Capital

January 10, 2025

Cooley advised Machinify, a provider of artificial intelligence-powered software transforming healthcare payments, on its definitive agreement to be acquired by New Mountain Capital.

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Josh Seidenfeld
Partner, Palo Alto
Garth Angelo Osterman
Partner, San Francisco
Maureen Nagle
Special Counsel, Washington, DC
Nicolas Francis
Associate, San Francisco
Katie Rosati
Associate, Seattle
Mark Windfeld-Hansen
Senior Counsel, Palo Alto
David Dalton
Associate, Santa Monica
Steve Flores
Partner, Chicago
Sean O'Neill
Partner, Santa Monica
Alexis Finkelberg Bortniker
Partner, San Diego
Ross Eberly
Partner, Santa Monica
Charles Haley
Partner, Palo Alto
Ryan Montgomery
Partner, Boston
Jonathan Rivinus
Partner, Colorado
Mark Medearis
Senior Counsel, Palo Alto
Sharon Connaughton
Special Counsel, Washington, DC
Alexander Ellebracht
Associate, Palo Alto
Josh Himmelstern
Associate, San Diego
Jessica Li
Associate, Palo Alto
Alison L. Tong
Associate, Seattle
Novak Topalovic
Associate, San Diego
Rubin Waranch
Associate, Colorado
Raquel Zepeda
Associate, San Francisco
Patricia Myers
Paralegal Specialist, Colorado
Melanie Yuvienco
Paralegal Specialist, Palo Alto
Brian Mitchell
Transactional Quantitative Analyst, San Diego

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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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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
Gary Warren Hunt III
Associate, Washington, DC
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

Confluent Acquires WarpStream

September 9, 2024

Cooley advised Confluent, a data-streaming platform pioneering a fundamentally new category of data infrastructure that sets data in motion, on its acquisition of WarpStream, an Apache Kafka-compatible data-streaming platform.

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Related contacts

Garth Angelo Osterman
Partner, San Francisco
Jenny Ge
Associate, Santa Monica
Caitlin Courtney
Partner, Palo Alto
Barbara Mirza
Partner, Santa Monica
Ross Eberly
Partner, Santa Monica
Timothy Shapiro
Partner, Palo Alto
Cristina DeBiase
Associate, Boston
Joshua Elefant
Associate, Palo Alto
Allison Kutner
Associate, New York
Jon Avina
Partner, Palo Alto
Howard Morse
Senior Counsel, Washington, DC
Chris Stack
Partner, London
Milson Yu
Partner, Palo Alto
Francis Wheeler
Senior Counsel, Colorado
Bryan Berman
Special Counsel, Colorado
Sharon Connaughton
Special Counsel, Washington, DC
Stella Sarma
Partner, Brussels
Tiffany Allen
Associate, Palo Alto
Nikki Chang DiFederico
Associate, Palo Alto
Megan Drill
Associate, San Diego
Josh Himmelstern
Associate, San Diego
Anne Luquette
Associate, San Francisco
Patricia Myers
Paralegal Specialist, Colorado
Brian Mitchell
Transactional Quantitative Analyst, San Diego

Related Practices & Industries

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