Managing Director
Jack Blomfield is a managing director for William Blair based in the firm’s London office. He joined William Blair's investment banking team in 2010. Prior to William Blair, he worked for Deloitte.
have made a strategic
minority investment in
November 2025
William Blair acted as the exclusive financial advisor to Abry Partners in connection with its pending significant minority investment in European Dynamics, alongside CAPZA.
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has acquired
January 2025
has been acquired by
December 2024
a portfolio company of Triton
has been acquired by
June 2024
a portfolio company of ICG
has been acquired by
December 2023
(European Operations)
has been acquired by
April 2023
a portfolio company of Odewald KMU
has been acquired by
September 2022
a portfolio company of Graphite Capital
has been acquired by
August 2022
has been acquired by
June 2022
a portfolio company of Corsair and Palamon Capital Partners
has received a strategic investment from
March 2022
William Blair acted as the exclusive financial advisor to Currencies Direct, a portfolio company of Corsair and Palamon Capital Partners, in connection with its strategic investment from funds managed by Blackstone Tactical Opportunities.
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a portfolio company of Bain Capital
has sold its Reputation Intelligence Business to
January 2022
William Blair acted as the exclusive financial advisor to Kantar and Bain Capital in connection with the pending sale of Kantar’s Reputation Intelligence business to STG.
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a portfolio company of Great Hill Partners
has been acquired by
August 2021
William Blair acted as the exclusive financial advisor to Reward Gateway, a portfolio company of Great Hill Partners, in connection with its pending sale to Abry Partners and Castik Capital.
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More about investment banking at William Blair
William Blair is a premier global partnership with expertise in investment banking, investment management, and private wealth management. We provide advisory services, strategies, and solutions to meet our clients’ evolving needs. As an independent and employee-owned firm, together with our strategic partners, we operate in more than 20 offices worldwide.*
Year William Blair was founded
Employees worldwide
Client assets
Independent and employee-owned
Offices worldwide
Companies under coverage
As of September 30, 2025
*Includes strategic partnerships with Allier Capital, BDA Partners, and Poalim Capital Markets.
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