Steve Tonsfeldt

Partner
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I work with companies on high-stakes, game-changing deals.

Experience

Lacework to Be Acquired by Fortinet

June 10, 2024

Cooley advised Lacework, a data-driven cloud security company, on its definitive agreement to be acquired by Fortinet (Nasdaq: FTNT), the global cybersecurity leader driving the convergence of networking and security.

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Steve Tonsfeldt
Partner, Palo Alto
Mark Tanoury
Partner, Palo Alto
Gaël Y. Hagan
Associate, Colorado
Ross Eberly
Partner, Los Angeles Santa Monica
Xander Lee
Partner, Los Angeles Santa Monica
Blake Martell
Partner, San Francisco
Howard Morse
Partner, Washington, DC
David Navetta
Partner, Colorado
Tracy Rubin
Partner, Palo Alto
David Burns
Special Counsel, Washington, DC
Kristin O'Hanlon
Special Counsel, San Francisco
Nikita Appaswami
Associate, Palo Alto
Amanda Griggs
Associate, New York
Helen Luu
Associate, Palo Alto
Allison Peth
Associate, Palo Alto
Breanna Qin
Associate, Palo Alto
Christopher Suhler
Associate, Colorado
Genevieve Lim Urban
Associate, Seattle
Natalie D. Vernon
Associate, Colorado
Jeramie Perez
Senior Paralegal, Palo Alto

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Freshworks Agrees to Acquire Device42

May 3, 2024

Cooley advised Freshworks (Nasdaq: FRSH), a company that creates artificial intelligence-boosted business software for IT, customer support, sales, and marketing teams to make them more efficient and deliver more value for immediate business impact, on its agreement and plan of merger with D42 Parent (Device42), pursuant to which Freshworks – through its wholly owned subsidiary, Doppler Merger Sub –will acquire all of the outstanding equity interests of Device42 for an aggregate purchase price of approximately $230 million.Cooley advised Freshworks (Nasdaq: FRSH), a company that creates artificial intelligence-boosted business software for IT, customer support, sales, and marketing teams to make them more efficient and deliver more value for immediate business impact, on its agreement and plan of merger with D42 Parent (Device42), pursuant to which Freshworks – through its wholly owned subsidiary, Doppler Merger Sub –will acquire all of the outstanding equity interests of Device42 for an aggregate purchase price of approximately $230 million.

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Related contacts

Sepideh Mousakhani
Partner, Palo Alto
Rishab Kumar
Partner, Palo Alto
Steve Tonsfeldt
Partner, Palo Alto
Zachary Sonenshine
Associate, New York
Cristina Lombardi
Associate, New York
Queenie Chen
Associate, Palo Alto
Ariane A. Andrade
Partner, Chicago
Megan Browdie
Partner, Washington, DC
Calise Cheng
Partner, Palo Alto
Ross Eberly
Partner, Los Angeles Santa Monica
Charles Haley
Partner, Palo Alto
Eileen Marshall
Partner, Washington, DC
Alessandra Murata
Partner, Palo Alto
Tracy Rubin
Partner, Palo Alto
Elizabeth Skey
Partner, Palo Alto
Chris Stack
Partner, London
Bryan Berman
Special Counsel, Colorado
Stacey A. Bradford
Special Counsel, Washington, DC
Amy Collins
Special Counsel, London
David Hopkins
Special Counsel, Colorado
Kristopher Kleiner
Special Counsel, Colorado
Stella Sarma
Special Counsel, Brussels
Tiffany Allen
Associate, Palo Alto
Kafeel Azher
Associate, London
Nachi Baru
Associate, San Diego
Jaleel Chandler
Associate, Los Angeles Santa Monica
Joshua Elefant
Associate, Palo Alto
Athina Gaki
Associate, Brussels
Tony P. Guan
Associate, Los Angeles Santa Monica
Rachel F. Katz
Associate, New York
Katie Kaufman
Associate, Washington, DC
Allison Kutner
Associate, New York
Breanna Qin
Associate, Palo Alto
Patrick Sharma
Associate, Los Angeles Santa Monica
Mickeala Tu
Associate, Palo Alto
Genevieve Lim Urban
Associate, Seattle
Patricia Myers
Paralegal Specialist, Colorado
Laura Unga
Paralegal Specialist, Palo Alto
Brian Youn
Paralegal Specialist, Palo Alto
Sarah Buchik
Associate, New York

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Propella Therapeutics Enters Merger Agreement With Astellas Pharma

November 16, 2023

Cooley advised Propella Therapeutics, a privately held biopharmaceutical company that has leveraged a wholly owned proprietary platform that combines medicinal chemistry with lymphatic targeting to create new oncology drugs, on its merger agreement with Astellas Pharma in which Astellas will acquire Propella through a US subsidiary.

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Related contacts

Aaron Binstock
Partner, Washington, DC
Kenneth Krisko
Partner, Reston
Lindsey O'Crump
Associate, Washington, DC
Danielle Joe
Associate, Washington, DC
David Walsh
Partner, Reston
Xander Lee
Partner, Los Angeles Santa Monica
Megan Browdie
Partner, Washington, DC
Howard Morse
Partner, Washington, DC
Steve Tonsfeldt
Partner, Palo Alto
Christopher Kimball
Partner, Washington, DC
Natasha Leskovsek
Of Counsel, Washington, DC
Mary Maher Lewis
Special Counsel, Reston
Stacey A. Bradford
Special Counsel, Washington, DC
Heather Harrington
Special Counsel, Boston
Stephanie Parker Palmer
Special Counsel, Reston
Stella Sarma
Special Counsel, Brussels
Sharon Connaughton
Special Counsel, Washington, DC
Richard G.S. Lee
Associate, Washington, DC
Jennifer Don
Associate, Reston
John Forrest
Associate, Boston
Kevin Milgram
Associate, Reston
Carly Mitchell
Partner, Washington, DC
Rick Jantz
Associate, Los Angeles Santa Monica
Virat Gupta
Associate, Washington, DC
Amanda Griggs
Associate, New York
Patricia Myers
Paralegal Specialist, Colorado

Related Practices & Industries

Moogsoft Agrees to Sell to Dell

July 19, 2023

Cooley advised Moogsoft, an artificial intelligence-driven provider of intelligent monitoring solutions that support DevOps and ITOps, on its agreement to sell to Dell Technologies. Lawyers Steve Tonsfeldt, Mark Tanoury, Sangitha Palaniappa and Allison Peth led the Cooley team advising Moogsoft.

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Related contacts

Sangitha Palaniappa
Associate, Palo Alto
Mark Tanoury
Partner, Palo Alto
Ure A. Obioma
Associate, Palo Alto
Tyler McClure
Associate, San Francisco
Joe Mandry
Associate, San Diego
Steve Tonsfeldt
Partner, Palo Alto
Ajay Athavale
Associate, San Francisco
David Wilson
Partner, London
David H. Zhou
Associate, Palo Alto
Jia Xie
Associate, London
Tracy Rubin
Partner, Palo Alto
Mickeala Tu
Associate, Palo Alto
Kafeel Azher
Associate, London
John Alec Stouras
Associate, Palo Alto
Nathaniel Hearn Jr.
Associate, Chicago
Michael Gladstone
Associate, New York
Allison Peth
Associate, Palo Alto
Alessandra Murata
Partner, Palo Alto
Jose Luis Gonzalez
Associate, Palo Alto
Ross Eberly
Partner, Los Angeles Santa Monica
Kristopher Kleiner
Special Counsel, Colorado
Bomin Kim
Associate, New York
Eileen Leman
Associate, Los Angeles Downtown
Paula Holland
Partner, London
Casey Warsh
Associate, Colorado
Christine Graham
Special Counsel, London
Rubin Waranch
Associate, Colorado
Allison Kutner
Associate, New York
Stella Sarma
Special Counsel, Brussels
Ann Bevitt
Partner, London

Related Practices & Industries

ThoughtSpot Acquires Mode Analytics

June 27, 2023

Cooley advised ThoughtSpot, an artificial intelligence-powered analytics company, on its definitive agreement to acquire Mode Analytics for $200 million.

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Related contacts

Rishab Kumar
Partner, Palo Alto
Alessandra Murata
Partner, Palo Alto
Ross Eberly
Partner, Los Angeles Santa Monica
Steve Tonsfeldt
Partner, Palo Alto
John Paul Oleksiuk
Partner, New York
Mark Windfeld-Hansen
Senior Counsel, Palo Alto
Kristopher Kleiner
Special Counsel, Colorado
Sharon Connaughton
Special Counsel, Washington, DC
Stella Sarma
Special Counsel, Brussels
Bryan Berman
Special Counsel, Colorado
Daniel Rubin
Associate, Palo Alto
Sangitha Palaniappa
Associate, Palo Alto
Julia Gage
Associate, San Francisco
Tony P. Guan
Associate, Los Angeles Santa Monica
Amanda Pacheco
Associate, Palo Alto
Caitlin Courtney
Partner, Palo Alto
Allison Kutner
Associate, New York
Megan Drill
Associate, San Diego
Narmada Murugan
Associate, Palo Alto
Kassity L. Mai
Special Counsel, Reston

Related Practices & Industries

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Rankings and accolades

Chambers USA: Corporate/M&A – California: San Francisco, Silicon Valley & Surro (2003 – 2024)

Lawdragon: 500 Leading Dealmakers in America (2021 – 2023)

Who's Who Legal: Thought Leader – M&A and Governance (2021 – 2023)

IFLR1000: Highly Regarded – Private Equity, M&A (California) (2020 – 2023)

The Legal 500 Recognized Attorney (2016, 2017, 2018, 2019, 2021, 2023)

The Legal 500 M&A Powerlist (2024)

Best Lawyers in America: Mergers & Acquisitions (2006 – 2023)

Memberships and affiliations

Berkeley Center for Law and Business – Executive Advisory Board

Certified Public Accountant