Flexstone Partners Closes Acquisition of Glouston Capital Partners

NEW YORK & BOSTON--(BUSINESS WIRE)--Flexstone Partners (Flexstone), a global private markets investment manager and affiliate of Natixis Investment Managers, today announced the successful closing of its previously announced acquisition of Glouston Capital Partners (Glouston), a Boston-based private equity secondaries manager.

Today marks the completion of the transaction, and Flexstone now manages more than $15 billion in assets across Primary, Co-Investment, and Secondary private equity strategies, creating a diversified private markets platform serving institutional investors across North America, Europe, and Asia. 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.

“Completing this transaction marks an exciting milestone for Flexstone,” said Eric Deram, Managing Partner and CEO of Flexstone Partners. "Glouston's experienced team and strong reputation in the middle-market secondary space complement our existing platform exceptionally well. Together, we are better positioned to provide investors with differentiated private equity solutions across the full spectrum of primary, co-investment, and secondary strategies."

Glouston's investment team has joined Flexstone and will continue to operate from the firm’s Boston office. Glouston’s investment strategy and team remain intact, ensuring continuity for existing investors and investment partners. Glouston's strategies will be rebranded under the Flexstone Partners name, with the original investment team continuing to manage the business. Existing fund structures, limited partner agreements, and investment mandates are unaffected by the transition.

As previously announced, the six Glouston partners have become Managing Partners of Flexstone, reinforcing long-term alignment across the combined organization. The expanded platform includes 37 investment professionals operating across New York, Boston, Paris, Geneva, and Singapore.

About Glouston Capital
Glouston Capital Partners is a Boston‑based private equity secondaries manager focused on the North American buyout middle market. Since 1994, the firm has invested more than $2.9 billion across 290 secondary transactions, serving a diverse institutional client base with a disciplined, relationship‑driven investment approach.

About Flexstone Partners
Flexstone Partners ("Flexstone")¹ is an affiliate of Natixis Investment Managers. The company manages more than $11.9 billion in assets² and provides institutional investors around the world with tailored private equity investment and advisory services. Flexstone's fund-of-funds, co-investment and secondary market strategies primarily focus on small and midcap segments, growth equity and emerging managers in the United States, Europe and Asia. With more than 65 experts based in New York, Paris, Geneva and Singapore, Flexstone's international team meets the needs of its clients around the world. Made up of a team of specialists with complementary profiles, Flexstone benefits from their in-depth market knowledge as well as unique expertise in private equity. It is present in the most promising markets of North America, Europe and Asia. For more information: www.flexstonepartners.com

¹ The name Flexstone refers to Flexstone Partners and all of its affiliated entities.
² Assets under management or advice as of April 30, 2026, composed of commitments for closed private investment funds, and the sum of the net asset value and uncalled commitments for other types of funds or mandates.

About Natixis Investment Managers
Natixis Investment Managers’ multi-affiliate approach connects clients to the independent thinking and focused expertise of more than 15 active managers. Ranked among the world’s largest asset managers¹ with more than $1.5 trillion assets under management² (€1.3 trillion), Natixis Investment Managers specializes in high-conviction active investment strategies, insurance and pension solutions, and private assets, and delivers a diverse offering across asset classes, styles, and vehicles. The firm partners with clients in order to understand their unique needs and provide insights and investment solutions tailored to their long-term goals.

Headquartered in Paris and Boston, Natixis Investment Managers is part of Groupe BPCE, the second-largest banking group in France through the Banque Populaire and Caisse d’Epargne retail networks. Natixis Investment Managers’ affiliated investment management firms include AEW; DNCA Investments;³ Flexstone Partners; Gateway Investment Advisers; Harris | Oakmark; Investors Mutual Limited; Loomis, Sayles & Company; Mirova; Naxicap Partners; Ossiam; Ostrum Asset Management; Seventure Partners; Vauban Infrastructure Partners; Vaughan Nelson Investment Management; VEGA Investment Solutions and WCM Investment Management. Additionally, investment solutions are offered through Natixis Investment Managers Solutions and Natixis Advisors, LLC. Not all offerings are available in all jurisdictions. For additional information, please visit Natixis Investment Managers’ website at im.natixis.com | LinkedIn: linkedin.com/company/natixis-investment-managers.

Natixis Investment Managers’ distribution and service groups include Natixis Distribution, LLC, a limited purpose broker-dealer and the distributor of various US registered investment companies for which advisory services are provided by affiliated firms of Natixis Investment Managers, Natixis Investment Managers International (France), and their affiliated distribution and service entities in Europe and Asia.

¹Survey respondents and publicly available data ranked by Investment & Pensions Europe/Top 500 Asset Managers 2026 ranked Natixis Investment Managers as the 21st largest asset manager in the world based on assets under management as of December 31, 2025.
²Assets under management (AUM) of affiliated entities measured as of June 30, 2026, are $1,525.1 billion (€1,334.0 billion). AUM, as reported, may include notional assets, assets serviced, gross assets, assets of minority-owned affiliated entities and other types of nonregulatory AUM managed or serviced by firms affiliated with Natixis Investment Managers.
³A brand of DNCA Finance.

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