Key Takeaways
- • Flexstone Partners, an affiliate of Natixis Investment Managers, is acquiring Glouston Capital Partners, a $3.4 billion employee-owned private equity secondaries manager founded in 1994 and based in Boston.
- • The acquisition combines the two platforms into a $15+ billion asset base, significantly expanding Flexstone's U.S. distribution capabilities and secondaries expertise across North American buyout assets.
- • Glouston's six partners, including senior managing partner Red Barrett, will maintain operational independence and continue running the business from Boston under their existing investment process and governance structure.
- • Glouston's fund strategies will be rebranded under the Flexstone name, though all existing fund structures and mandates remain unchanged, minimizing disruption to current investors.
- • Flexstone brings $12+ billion in assets and a global footprint (New York, Paris, Geneva, Singapore) focused on small- and mid-cap private equity and growth equity investments.
Summary
Flexstone Partners, a private equity and growth equity platform affiliated with Natixis Investment Managers, has agreed to acquire Glouston Capital Partners, a 32-year-old Boston-based secondaries manager. The transaction consolidates two complementary platforms into a combined entity with more than $15 billion in assets under management, representing a meaningful scale-up for Flexstone's secondaries operations in North America.
Glouston, which is 100% employee-owned, manages $3.4 billion in assets and specializes in constructing diversified portfolios of North American buyout assets through secondary market transactions and co-investments alongside established private equity sponsors. The firm, originally founded in 1994, became an independent entity in 2002 and has built institutional credibility as a dedicated secondaries player. Flexstone, by contrast, operates a $12+ billion platform with a broader focus on small- and mid-cap private equity and growth equity, with offices spanning New York, Paris, Geneva, and Singapore.
Under the acquisition structure, Glouston's six senior partners, led by Red Barrett, will retain full operational control and continue managing the business from Boston without disruption to their investment process. The deal preserves business continuity by keeping fund structures and existing mandates intact. The primary change for external stakeholders will be a rebranding of Glouston's strategies under the Flexstone banner, though this operates as a name change only, with no substantive modifications to investment approach or governance. Flexstone's existing secondaries team will integrate with Glouston's leadership to accelerate U.S. distribution and market reach, positioning the combined platform to serve institutional clients across a broader geographic and product spectrum.
This acquisition underscores continued consolidation within the private equity secondaries sector, where scale, distribution capabilities, and operational expertise remain critical competitive advantages. For Flexstone, the deal provides immediate access to Glouston's established investor base and proven track record in secondaries. For Glouston's partners, the transaction offers an exit opportunity while maintaining operational autonomy and preserving the firm's Boston-based identity and decision-making structure.
Glouston, which is 100% employee-owned, manages $3.4 billion in assets and specializes in constructing diversified portfolios of North American buyout assets through secondary market transactions and co-investments alongside established private equity sponsors. The firm, originally founded in 1994, became an independent entity in 2002 and has built institutional credibility as a dedicated secondaries player. Flexstone, by contrast, operates a $12+ billion platform with a broader focus on small- and mid-cap private equity and growth equity, with offices spanning New York, Paris, Geneva, and Singapore.
Under the acquisition structure, Glouston's six senior partners, led by Red Barrett, will retain full operational control and continue managing the business from Boston without disruption to their investment process. The deal preserves business continuity by keeping fund structures and existing mandates intact. The primary change for external stakeholders will be a rebranding of Glouston's strategies under the Flexstone banner, though this operates as a name change only, with no substantive modifications to investment approach or governance. Flexstone's existing secondaries team will integrate with Glouston's leadership to accelerate U.S. distribution and market reach, positioning the combined platform to serve institutional clients across a broader geographic and product spectrum.
This acquisition underscores continued consolidation within the private equity secondaries sector, where scale, distribution capabilities, and operational expertise remain critical competitive advantages. For Flexstone, the deal provides immediate access to Glouston's established investor base and proven track record in secondaries. For Glouston's partners, the transaction offers an exit opportunity while maintaining operational autonomy and preserving the firm's Boston-based identity and decision-making structure.
Go deeper than the headline
Research every firm in this story, track the ones that matter and get the daily briefing — free for 7 days.