Courtney M.W. Tygesson

Partner
Full contact info

I dive into the trenches with clients, building relationships that transcend the deal or project we’re working on – I want them to feel like we’re more than just outside counsel, but a true extension of their team.

Experience

Ambiq Micro Announces Pricing of $96 Million IPO

July 30, 2025

Cooley advised Ambiq Micro, a technology leader in ultra-low-power semiconductor solutions for edge artificial intelligence, on its $96 million initial public offering (IPO).

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Christina T. Roupas
Partner in Charge – Chicago, Chicago
Courtney M.W. Tygesson
Partner, Chicago
Michael Platt
Partner in Charge – Colorado, Colorado
Kelly Bartling
Special Counsel, Colorado
Grady Chang
Associate, Santa Monica
Keith Berets
Partner, Colorado
Will Cai
Partner, Hong Kong
Annie Froehlich
Partner, Washington, DC
Austin Holt
Partner, Santa Monica
Len Jacoby
Partner, New York
Christopher Kimball
Partner, Washington, DC
Kevin King
Partner, Washington, DC
Patrick Loofbourrow
Partner, Singapore
Barbara Mirza
Partner, Santa Monica
Tim Pitrelli
Partner, Singapore
Nicola Squire
Partner, London
Jeffrey J. Tolin
Partner, New York
Francis Wheeler
Senior Counsel, Colorado
Mark Windfeld-Hansen
Senior Counsel, Palo Alto
Alaina DeBona
Special Counsel, Chicago
Andrew Epstein
Special Counsel, Seattle
Brooke Fritz
Special Counsel, Colorado
Rebecca Ross
Special Counsel, Washington, DC
Vince Sampson
Special Counsel, Washington, DC
Michael Shen
Special Counsel, Shanghai
Karen Tsai
Special Counsel, Washington, DC
Blake Martell
Of counsel, San Francisco
Mateus Kaba Aboud
Associate, Chicago
Adam Bloom
Associate, Chicago
Alexis Guillermo Buz
Associate, San Diego
Umer Chaudhry
Associate, Washington, DC
Stefan Cohen
Associate, New York
Megan Drill
Associate, San Diego
Ryan Guo
Associate, New York
Sarah Oliai
Associate, Washington, DC
Ehijele Olumese
Associate, Santa Monica
Samuel Paullin
Associate, Chicago
Taryn Wilkins
Associate, Chicago
Katherine Duplay
Paralegal Specialist, Colorado
Alla Kagan
Paralegal Specialist, San Diego
Robin K. Lee
Paralegal Specialist, Colorado
Brian Youn
Paralegal Specialist, Palo Alto
Brian Mitchell
Transactional Quantitative Analyst, San Diego

Related Practices & Industries

Tempus Announces Upsized $650 Million Convertible Senior Notes Offering

June 30, 2025

Cooley advised Tempus AI (Nasdaq: TEM), a technology company advancing precision medicine and patient care through artificial intelligence, on its offering of $650 million aggregate principal amount of 0.75% convertible senior notes due 2030 in a private placement to persons reasonably believed to be qualified institutional buyers pursuant to Rule 144A under the Securities Act of 1933, as amended.

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Related contacts

Christina T. Roupas
Partner in Charge – Chicago, Chicago
Jason Savich
Partner, San Francisco
Mischi a Marca
Partner, San Francisco
Xander Lee
Partner, Santa Monica
Eileen Marshall
Partner, Washington, DC
Addison Pierce
Partner, Chicago
Timothy Shapiro
Partner, Palo Alto
Courtney M.W. Tygesson
Partner, Chicago
Francis Wheeler
Senior Counsel, Colorado
Shimeng Cheng
Special Counsel, San Francisco
Mateus Kaba Aboud
Associate, Chicago
Yoni Horn
Associate, Santa Monica
Rick Jantz
Associate, Santa Monica
Pengli Li
Associate, Boston
Xueqing Li
Associate, San Francisco
Madison (JJ) Meng
Associate, San Francisco
Samuel Paullin
Associate, Chicago
Stevie Yu
Associate, New York

Related Practices & Industries

AIRO Group Holdings Closes $69 Million IPO

June 16, 2025

Cooley advised AIRO Group Holdings, a company specializing in advanced aerospace and defense technologies, on its $69 million initial public offering (IPO).

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Related contacts

Christina T. Roupas
Partner in Charge – Chicago, Chicago
Yvan-Claude Pierre
Partner, New York
Courtney M.W. Tygesson
Partner, Chicago
Grady Chang
Associate, Santa Monica
Darren DeStefano
Partner, Reston
David Fletcher
Partner, Washington, DC
Christopher Hutter
Partner, Reston
Xander Lee
Partner, Santa Monica
Joshua Mates
Partner, San Francisco
Addison Pierce
Partner, Chicago
Howard Morse
Senior Counsel, Washington, DC
Francis Wheeler
Senior Counsel, Colorado
Mark Windfeld-Hansen
Senior Counsel, Palo Alto
Karun Ahuja
Special Counsel, Chicago
Julia R. Brinton
Special Counsel, Washington, DC
Reid Hooper
Special Counsel, Washington, DC
Justin Kisner
Special Counsel, San Diego
Karen Tsai
Special Counsel, Washington, DC
David Wraige
Special Counsel, London
Kevin Carlson
Associate, Chicago
Megan Drill
Associate, San Diego
Leah Duncan
Associate, Chicago
Anders Fernstrom
Associate, Reston
Peter A. Haddad
Associate, San Diego
Erin Hilliard
Associate, San Francisco
Allison Kutner
Associate, New York
Breanna Qin
Associate, Palo Alto
Jesse Schulman
Associate, Colorado
Mariah A. Young
Associate, Chicago
Chris Rhem
Paralegal Specialist, San Francisco
Kate Walther
Paralegal Specialist, San Diego
Brandon Lefebvre
Quantitative Analyst, Boston

Related Practices & Industries

Alto Neuroscience – $75 Million Debt Financing

January 13, 2025

Cooley advised Alto Neuroscience, a company redefining psychiatry by leveraging individuals’ neurobiology to develop personalized and highly effective medicines and helping patients get better faster, on its up to $75 million debt financing. Partner Addison Pierce led the Cooley team, which included Courtney Tygesson, Madison Jones, Margaret Barreto and Katie Lapidus.

Related contacts

Addison Pierce
Partner, Chicago
Courtney M.W. Tygesson
Partner, Chicago
Madison Jones
Partner, Washington, DC
Margaret Barreto
Associate, San Francisco
Katie Lapidus
Associate, Washington, DC

Tempus Announces $600 Million Acquisition of Ambry Genetics

November 4, 2024

Cooley advised Tempus AI (Nasdaq: TEM), a technology company advancing precision medicine through the practical application of artificial intelligence in healthcare, on its agreement to acquire Ambry Genetics, a company focusing on genetic testing that aims to improve health by understanding the relationship between genetics and disease.

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Related contacts

Erin J. Kirchner
Partner, Chicago
Christina T. Roupas
Partner in Charge – Chicago, Chicago
Courtney M.W. Tygesson
Partner, Chicago
Michael Tollini
Partner, Washington, DC
Lindsey O'Crump
Associate, Washington, DC
Addison Pierce
Partner, Chicago
Ariane A. Andrade
Partner, Chicago
Steve Flores
Partner, Chicago
Todd Gluth
Partner, San Diego
Christopher Kimball
Partner, Washington, DC
Phil Mitchell
Partner, New York
Howard Morse
Senior Counsel, Washington, DC
Sonia Nath
Partner, Washington, DC
Nyron J. Persaud
Partner, New York
Aaron Pomeroy
Partner, Colorado
Dr. Madhuri Roy
Partner, Palo Alto
Michelle Garcia Schulman
Partner, Reston
Rachel Thorn
Of counsel, New York
Ryan Vann
Partner, Chicago
Susan Piascik Christoff
Special Counsel, Washington, DC
Son Nguyen
Special Counsel, Washington, DC
Randy Sabett
Special Counsel, Washington, DC
Stella Sarma
Partner, Brussels
Grant Schweikert
Special Counsel, Washington, DC
Karen Tsai
Special Counsel, Washington, DC
Xander Lee
Partner, Santa Monica
Mateus Kaba Aboud
Associate, Chicago
Karun Ahuja
Special Counsel, Chicago
Tiffany Allen
Associate, Palo Alto
Umer Chaudhry
Associate, Washington, DC
Adrienne Beaudoin Deshmukh
Associate, Reston
Mari Dugas
Associate, Washington, DC
Carly E. Gibbons
Associate, Chicago
Jose Luis Gonzalez
Associate, Palo Alto
Charles Haley
Partner, Palo Alto
Kelley Harrington
Associate, Chicago
Nathaniel Hearn Jr.
Associate, Chicago
Kyle Hess
Associate, New York
Cameron Irwin
Associate, Chicago
Rick Jantz
Associate, Santa Monica
Patrick O. Johnson
Associate, Boston
David H. Zhou
Associate, Palo Alto
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Courtney Tygesson looking into camera

Meet Courtney Tygesson

Admissions and credentials

Illinois

Minnesota

Rankings and accolades

Best Lawyers: Ones to Watch, Corporate Law (2021)

Super Lawyers: Illinois Rising Star (2019)

Leading Lawyers Network: Emerging Lawyer (2017)