Mark Windfeld-Hansen

Senior Counsel
Full contact info

Almost every deal has tax implications. I work side by side with the transaction team from the outset.

Experience

Boston Celtics Announce $6.1 Billion Sale to Group Led by William Chisholm

March 20, 2025

Cooley advised the Boston Celtics and the Grousbeck family – the majority stakeholders of Boston Basketball Partners, which owns the American professional basketball team – in connection with their agreement to sell the Celtics to an investor group led by William Chisholm.

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Matthew Hemington
Partner, Palo Alto
Steve Tonsfeldt
Partner, Palo Alto
David Silverman
Partner, New York
Gaël Y. Hagan
Special Counsel , Colorado
Alanna Anderson
Associate, Palo Alto
Ryan Fitzgerald
Associate, Palo Alto
Mark Windfeld-Hansen
Senior Counsel, Palo Alto
Todd Gluth
Partner, San Diego
Patrick Sharma
Associate, Santa Monica
Megan Browdie
Partner, Washington, DC
Rubin Waranch
Associate, Colorado
Michael McMahon
Partner, Boston
Rishab Kumar
Partner, Palo Alto
Eric Jensen
Senior Counsel, Palo Alto
Mark Tanoury
Senior Partner, Palo Alto
Rachel Thorn
Of counsel, New York

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Poppi Announces $1.95 Billion Sale to PepsiCo

March 17, 2025

Cooley advised VNGR Beverage (doing business as poppi), a fast-growing prebiotic soda brand, on its acquisition by PepsiCo (Nasdaq: PEP) for $1.95 billion, including an additional potential earnout consideration subject to the achievement of certain performance milestones within a specified period after closing.

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Nick Davis
Partner in Charge – Seattle, Seattle
Erin J. Kirchner
Partner, Chicago
Caitlin Breitenbruck
Associate, Seattle
Pat O'Connell
Associate, New York
Elaine Huang
Associate, Palo Alto
John Robertson
Senior Counsel, Seattle
Colleen Badgley
Partner, Seattle
Willy Cowles
Associate, Seattle
Megan Browdie
Partner, Washington, DC
Jonathan Rivinus
Partner, Colorado
Keith Berets
Partner, Colorado
Michael Bergmann
Partner, Washington, DC
Megan Donohue
Partner, San Diego
Michelle Doolin
Partner, San Diego
Ross Eberly
Partner, Santa Monica
Alan Hambelton
Partner, Seattle
Ryan Montgomery
Partner, Boston
Sonia Nath
Partner, Washington, DC
Leo Spicer-Phelps
Partner, London
Kyle Wong
Partner, San Francisco
Mark Windfeld-Hansen
Senior Counsel, Palo Alto
Bryan Berman
Special Counsel, Colorado
Andrew Epstein
Special Counsel, Seattle
Rebecca Evanson
Special Counsel, Colorado
Peter Burns
Of Counsel, Palo Alto
Lucy Bauer
Associate, Seattle
Mari Dugas
Associate, Washington, DC
Alexander Ellebracht
Associate, Palo Alto
Auguste Humphries
Associate, Washington, DC
Katie Kaufman
Associate, Boston
Eileen Leman
Associate, Los Angeles
Michael Pelle
Associate, New York
Vivienne Pismarov
Associate, San Diego
Rubin Waranch
Associate, Colorado

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DataStax Announces Acquisition by IBM

February 25, 2025

Cooley advised DataStax, an artificial intelligence (AI) and data solution provider, on its acquisition by IBM (NYSE: IBM), a provider of global hybrid cloud and AI solutions and consulting expertise.

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Rishab Kumar
Partner, Palo Alto
David Segre
Of Counsel, Palo Alto
Grigor Lynch
Associate, Colorado
Alessandra Murata
Partner, Palo Alto
Timothy Shapiro
Partner, Palo Alto
Caitlin Courtney
Partner, Palo Alto
Ross Eberly
Partner, Santa Monica
Michael Bergmann
Partner, Washington, DC
Wendy Brenner
Partner, Palo Alto
Megan Browdie
Partner, Washington, DC
Annie Froehlich
Partner, Washington, DC
Stella Sarma
Partner, Brussels
David Wilson
Partner, London
Mark Windfeld-Hansen
Senior Counsel, Palo Alto
David Burns
Special Counsel, Washington, DC
Andrew Epstein
Special Counsel, Seattle
Kristopher Kleiner
Special Counsel, Colorado
Tiffany Allen
Associate, Palo Alto
Harry Calkin
Associate, London
Queenie Chen
Associate, Palo Alto
David Dalton
Associate, Santa Monica
Cristina DeBiase
Associate, Boston
Juan Pablo González
Associate, Palo Alto
Cameron Gyorffy
Associate, Santa Monica
Kelley Harrington
Associate, Chicago
Josh Himmelstern
Associate, San Diego
Katie Kaufman
Associate, Boston
Joseph J. Kim
Associate, Palo Alto
Eerik Kukebal
Associate, London
Allison Kutner
Associate, New York
Eileen Leman
Associate, Los Angeles
Breanna Qin
Associate, Palo Alto
Katie Stevens
Associate, Palo Alto
John Alec Stouras
Associate, Palo Alto
Nicholas Yacoubian
Associate, Palo Alto
Christy Fairlie
Paralegal Specialist, Reston
Katie Kissner
Quantitative Analyst, San Francisco

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MongoDB Announces Acquisition of Voyage AI

February 24, 2025

Cooley advised MongoDB (Nasdaq: MDB), a leading database for modern applications, on its acquisition of Voyage AI, a pioneer in state-of-the-art embedding and reranking models that power next-generation artificial intelligence applications.

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Related contacts

Kevin Cooper
Partner, New York
Christine Tse
Associate, New York
Thomas Connors
Partner, Boston
Annie Froehlich
Partner, Washington, DC
Barbara Mirza
Partner, Santa Monica
Phil Mitchell
Partner, New York
John Paul Oleksiuk
Partner, New York
Miriam Petrillo
Partner, Chicago
Jonathan Rivinus
Partner, Colorado
Ryan Vann
Partner, Chicago
Mark Windfeld-Hansen
Senior Counsel, Palo Alto
Sharon Connaughton
Special Counsel, Washington, DC
Reid Hooper
Special Counsel, Washington, DC
Kristopher Kleiner
Special Counsel, Colorado
Dillon Martinson
Special Counsel, Washington, DC
Megan Drill
Associate, San Diego
Jimmy Gilligan
Associate, Boston
Liza Hadley
Associate, Boston
Wyatt Kernell
Associate, Colorado
Allison Kutner
Associate, New York
Caolinn Mejza
Associate, New York
Lois NaYeon Yoo
Associate, New York
Leanne Andrepont
Senior Trademark Paralegal
Jake Ironfield
Transactional Quantitative Analyst, New York

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Alani Nu’s $1.8 Billion Sale to Celsius

February 20, 2025

Cooley advised Katy Hearn and Haydn Schneider, co-founders of Alani Nu, in connection with Celsius Holdings’ (Nasdaq: CELH) definitive agreement to acquire the company for $1.8 billion in cash and stock.

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Related contacts

Bill Roegge
Partner, New York
Stephanie Leigh
Paralegal Specialist, San Diego
Stephanie Gentile
Partner, New York
Jeremy Morrison
Partner, Washington, DC
Vicky Kandabarow
Associate, Washington, DC
Kyle Hess
Associate, New York
Wesley Dietrich
Associate, Washington, DC
Sharon Connaughton
Special Counsel, Washington, DC
Todd Gluth
Partner, San Diego
Sarah Lightdale
Partner, New York
Eileen Marshall
Partner, Washington, DC
Mark Windfeld-Hansen
Senior Counsel, Palo Alto
Julia R. Brinton
Special Counsel, Washington, DC
William Corcoran
Of Counsel, Boston

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Admissions and credentials

California

Rankings and accolades

Best Lawyers in America: Tax Law

Legal 500 US: Domestic Tax (2015)

PATH Act Gives Tax Benefits to Emerging Growth Companies and Investors