NEW YORK, September 8, 2026 – Proskauer advised Glouston Capital Partners (Glouston), a Boston-based private equity secondaries manager, on its acquisition by Flexstone Partners (Flexstone), a global private markets investment manager and an affiliate of Natixis Investment Managers.
The combination enhances Flexstone's secondary market capabilities by adding Glouston's established presence in the North American middle market and deep relationships across the private equity ecosystem.
The Proskauer team was led by partners Grant Darwin and Steve Peck (M&A); partners Howard Beber and Louis Sorgi (Private Funds); and associate Sean Donoghue (M&A). It also included associates Julien Burger, Samantha Volpe, and Allyson Swartzberg and law clerk Anna Sykes (M&A); partners Nathan Schuur, Agnès Rossi, and John Verwey and associates Edward Guers, Kyle Litfin, Jordan Greene, and Mikaella Boniel (Private Funds); partners Scott Jones and Aaron Lee and associates Tom Multari and Jessie Lin (Tax); partner Seth Safra and associate Alyssa Swanstrom (Compensation and Benefits); partners Mary Wilks and John Ingrassia (Antitrust & Foreign Investment); and partner Nathan Lander (Insurance).