Flexstone Partners
Flexstone Partners is a global private markets investment manager serving institutional investors through Primary, Co-Investment, and Secondary private equity strategies from offices in New York, Boston, Paris, Geneva, and Singapore, with over $15 billion in combined AUM as an affiliate of Natixis Investment Managers.
- Company typePrivate
- Founded2005
- HeadquartersNew York, United States
- Headcount11–50
- GTM typeB2B
- OfferingServices
What Flexstone Partners does
Flexstone Partners is a global private markets investment manager founded in 2005 and headquartered in New York, operating as an affiliate of Natixis Investment Managers (part of the Groupe BPCE banking group). The firm serves institutional investors, including pension funds, sovereign wealth funds, insurance companies, and family offices, offering three core investment strategies: Primary fund commitments, Co-Investments alongside general partners, and Secondary transactions (both LP-led and GP-led). It manages dedicated vehicles such as Mid-Market Secondaries Fund III, Global Opportunities IV (GO IV, $790M closed 2023), France Sélection IV, and Select Opportunities II, with combined AUM exceeding $12 billion standalone and $15 billion following the announced 2026 acquisition of Glouston Capital Partners. The platform is staffed by more than 60 private investment specialists and operates from five offices in New York, Boston, Paris, Geneva, and Singapore, regulated by AMF in France, FINMA in Switzerland, and the SEC in the United States.
The firm's revenue model rests on management fees charged as a percentage of committed or invested capital across its fund vehicles, supplemented by performance-based carried interest on realizations above hurdle rates. Go-to-market is high-touch and relationship-driven, with dedicated local teams in each geography covering institutional clients through direct field sales, ESG-themed content marketing, industry event participation (UN PRI, France Invest, ILPA), and a Juniper Square-powered investor portal for reporting and LP servicing. Flexstone differentiates through ESG credentials (UN PRI signatory since 2014, Initiative Climat International signatory, France Invest Sustainability Commission membership) and a talent bench drawn from Adams Street Partners, UBS, AllianceBernstein, PAI Partners, and BNP Paribas.
Technology infrastructure is built around Juniper Square for investor portal and fund administration, with marketing operations supported by Salesforce Pardot, Marketing Cloud, and Google Analytics; no proprietary AI/ML capability, patent portfolio, or named model is disclosed. The firm relies on standardized institutional asset management workflows rather than technology as a primary value driver.
Flexstone Partners firmographics
Firmographics- Name
- Flexstone Partners
- Legal name
- Flexstone Partners SAS
- Website
- https://flexstonepartners.com
- Company type
- Private
- Founded year
- 2005
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Flexstone Partners is a global private markets investment manager serving institutional investors through Primary, Co-Investment, and Secondary private equity strategies from offices in New York, Boston, Paris, Geneva, and Singapore, with over $15 billion in combined AUM as an affiliate of Natixis Investment Managers.
- Ownership category
- akta.pro rank
Flexstone Partners industry classification
Industry- Product category
- Private Equity Asset Management
- NAICS
- Portfolio Management and Investment Advice (523940), Funds, Trusts, and Other Financial Vehicles (525)
- SIC
- Investment Advice (6282)
- akta.pro primary industry
- Secondaries-Focused Fund of Funds (LP / GP-led / Continuation Vehicles) (FSAHAKAH)
- akta.pro secondary industry
- GP-led Continuation Funds (Single-Asset & Multi-Asset) (FSANAFAB)
Keywords
Where Flexstone Partners is headquartered
LocationHeadquarters
- HQ city
- New York
- HQ country
- United States
- HQ region
- North America
Offices5 records
Markets served
Flexstone Partners business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure, Others
Revenue model
- Asset Management Fees: Flexstone Partners generates revenue through management fees charged on assets under management across its Primary, Co-Investment, and Secondary private equity strategies. The firm manages funds on behalf of institutional investors and charges fees typically calculated as a percentage of committed capital or invested assets.
- Carried Interest: As a private equity fund manager, Flexstone likely earns performance-based carried interest on investment returns above specified hurdle rates, typically 20% of profits in standard private equity fund structures.
Go-to-market motion1 record
Distribution channels1 record
Marketing channels5 records
Flexstone Partners product offering
Product offeringCore offering
Flexstone Partners is a global private markets investment manager that manages institutional capital through three core private equity strategies: Primary fund commitments at inception, Co-Investments alongside general partners, and Secondary purchases of LP interests and GP-led continuation transactions. The firm manages dedicated fund vehicles including Mid-Market Secondaries Fund III, GO IV, France Sélection IV, Select Opportunities II, and Switzerland Fund Solutions, serving institutional investors from offices in New York, Boston, Paris, Geneva, and Singapore.
Product overview
Flexstone Partners operates as a global private markets investment manager offering a unified platform with three core investment strategies: Primary (fund commitments at inception), Co-Investment (direct deal participation alongside GPs), and Secondary (LP-led and GP-led secondary transactions). The firm manages assets across dedicated fund vehicles including Mid-Market Secondaries Fund III, GO IV, France Sélection IV, and Select Opportunities II, serving institutional investors across North America, Europe, and Asia from offices in New York, Boston, Paris, Geneva, and Singapore. Following the 2026 acquisition of Glouston Capital Partners, the combined platform manages over $15 billion in assets.
Differentiator
Problem solved
Functional benefit
Products and services
- Primary Investment Strategies
- Co-Investment Strategies
- Secondary Investment Strategies
- Flexstone Mid-Market Secondaries Fund III
- GO IV (Global Opportunities IV)
- France Sélection IV
- Select Opportunities II
- Switzerland Fund Solutions
Quantifiable outcome
- Combined platform managing $15 billion+ in assets
- +2 more outcomes
Companies that use Flexstone Partners
Customer profileNamed customers1 record
Segments1 record
Ideal customer profiles1 record
Flexstone Partners technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Integration4 records
Flexstone Partners partnerships and signals
Strategic signalPartnerships
Two partnerships are on record, tiered core.
- Glouston Capital PartnerscoreFlexstone Partners agreed to acquire Glouston Capital Partners, a Boston-based private equity secondaries manager with over $3.4 billion in AUM. The transaction creates a combined platform managing more than $15 billion in assets. Glouston's six partners will roll equity into the combined firm and become Managing Partners of Flexstone, ensuring alignment of interests.
- Initiative Climat InternationalcoreFlexstone signed the Initiative Climat International manifesto, committing to climate action at both management company and portfolio levels, including engaging with GPs on climate change, integrating climate analysis into investment processes, and supporting emissions reduction plans.
Scale indicators9 records
Recent moves2 records
Expansion highlights6 records
Flexstone Partners competitors and assessment
Company assessmentDirect peers
- HarbourVest Partners: One of the largest global multi-strategy private markets investment managers offering primaries, secondaries, and co-investments. Directly comparable to Flexstone in business model, institutional client base, and global multi-office footprint, though at materially larger scale.
- StepStone Group: Public global private markets investment manager providing primary fund investments, secondary transactions, and co-investments across private equity, real estate, and infrastructure. Closest direct competitor to Flexstone's three-pillar platform model and institutional LP base.
- Pantheon Ventures: Global private markets FoF manager offering primary, secondary, and co-investment solutions to institutional investors. Highly comparable product mix and LP base to Flexstone, and part of the broader Affiliated Managers Group.
- Hamilton Lane: Public alternative investment manager providing private equity, private credit, and infrastructure solutions via primaries, secondaries, and co-investments. Directly competes with Flexstone across all three core strategies and serves a similar institutional LP base.
- Mesirow Financial Private Equity: Mid-sized multi-strategy private equity manager offering primaries, secondaries, and co-investments to institutional investors. Highly comparable scale and platform structure to Flexstone's pre-Glouston footprint.
- Capital Dynamics: Independent global private asset manager offering primary, secondary, and co-investment solutions to institutional investors. Comparable multi-strategy FoF model with similar institutional client focus.
- Adams Street Partners: Global private markets investment manager offering primary fund commitments, secondary transactions, co-investments, and direct investments. Former employer of Flexstone co-CIO David Arcauz and directly comparable in scale, product mix, and institutional client focus.
Broad incumbents
- Partners Group: Large global private markets investment manager operating across private equity, private debt, real estate, and infrastructure. Overlapping capabilities with Flexstone's PE platform but broader asset-class mandate and direct investment orientation rather than FoF model.
- Blackstone Private Equity: Largest global alternative asset manager with a broad private equity platform including primaries and secondaries exposure. Overlaps with Flexstone in private equity access but operates as a direct GP across strategies rather than a multi-manager platform.
- Goldman Sachs Asset Management Private Equity: Large alternative investment platform within Goldman Sachs Asset Management offering primary fund and secondary solutions to institutional LPs. Comparable institutional client base but operates within a much broader asset management franchise.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat6 records
Key risks5 records
Key highlights7 records
Customer concentration
Flexstone Partners social profiles
Digital presenceFlexstone Partners compliance and trust
Trust signalCompliance10 records
Flexstone Partners financial estimates
Financial estimateRevenue estimate
Valuation estimate
Flexstone Partners leadership team
Management profileNumber of profiles
Profiles6 records
Flexstone Partners subsidiaries and ownership
Company hierarchySubsidiaries1 record
Flexstone Partners funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Flexstone Partners M&A and investment
M&A and investmentM&A1 record
Investments8 records
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Flexstone Partners
What does Flexstone Partners do?
Flexstone Partners is a global private markets investment manager that manages institutional capital through three core private equity strategies: Primary fund commitments at inception, Co-Investments alongside general partners, and Secondary purchases of LP interests and GP-led continuation transactions. The firm manages dedicated fund vehicles including Mid-Market Secondaries Fund III, GO IV, France Sélection IV, Select Opportunities II, and Switzerland Fund Solutions, serving institutional investors from offices in New York, Boston, Paris, Geneva, and Singapore.
Is Flexstone Partners a public or private company?
Flexstone Partners is a private company. It is classified as corporate owned and is currently operating.
When was Flexstone Partners founded?
Flexstone Partners was founded in 2005. It employs 11 to 50 people.
Where is Flexstone Partners based?
Flexstone Partners is headquartered in New York, United States, in the North America region.
How does Flexstone Partners make money?
Two revenue lines are on record. Asset Management Fees are the primary driver. The others are carried Interest.
Who are Flexstone Partners's main competitors?
Direct peers on record are HarbourVest Partners, StepStone Group, Pantheon Ventures, Hamilton Lane, Mesirow Financial Private Equity, Capital Dynamics and Adams Street Partners. Broad incumbents are Partners Group, Blackstone Private Equity and Goldman Sachs Asset Management Private Equity.
Does Flexstone Partners have an API?
No public API is recorded for Flexstone Partners.
What industry is Flexstone Partners in?
Flexstone Partners's product category is Private Equity Asset Management. Its primary akta.pro industry code is FSAHAKAH, Secondaries-Focused Fund of Funds (LP / GP-led / Continuation Vehicles), with a secondary code of FSANAFAB, GP-led Continuation Funds (Single-Asset & Multi-Asset). Its NAICS code is 523940 and its SIC code is 6282.