Fund of One Formation: Single-Investor Vehicles & Custom Mandates
A fund of one is a dedicated investment fund vehicle structured for a single institutional investor — providing a customized investment mandate, bespoke governance, segregated accounting, and full transparency.
Last Updated: April 2026
Unlike commingled funds where multiple LPs share a single vehicle, a fund of one gives the investor complete control over terms, fees, investment guidelines, reporting, and governance. Fund-of-one structures are increasingly used by sovereign wealth funds, large pension plans, family offices, and institutional allocators who require tailored mandates that commingled funds cannot accommodate.
Unefund supports fund-of-one formation across 21 jurisdictions, designing single-investor vehicles with the same institutional rigor as multi-LP funds.
Use Cases
When a Fund of One Makes Sense
A fund of one is appropriate when:
Customized mandate
Specific sector restrictions, geographic limitations, ESG exclusions, or concentration limits that differ from the manager's standard fund
Full transparency
The investor wants position-level transparency that a commingled fund may not provide
Regulatory requirements
The investor's internal compliance or regulatory framework requires a segregated vehicle
Fee negotiation
The investor's allocation size warrants bespoke fee terms that differ from the standard fund
Co-investment rights
The investor wants pre-negotiated co-investment access alongside the main mandate
Governance control
The investor requires board representation, investment committee participation, or veto rights on specific decisions
Typical Investors
Fund-of-one investors are typically institutions with $50M+ allocations to a single manager, including sovereign wealth funds, large public and corporate pension plans, insurance companies, endowments and foundations, and ultra-high-net-worth family offices.
Structure
Key Structural Considerations
Vehicle Types
Limited Partnership
The most common structure, with the manager as GP and the investor as sole LP. The LPA is fully negotiated bilaterally.
Segregated Portfolio Company (SPC)
A Cayman Islands SPC can create a dedicated segregated portfolio for a single investor, ring-fenced from other portfolios within the same legal entity. This is operationally efficient for managers running multiple fund-of-one mandates.
Variable Capital Company (VCC)
Singapore's VCC structure accommodates sub-funds that can function as fund-of-one vehicles.
Managed Account
Not technically a "fund" — the investor retains direct ownership of assets in a segregated account, with the manager appointed as investment advisor. Provides the highest level of transparency and control.
Governance and Decision-Making
Fund-of-one governance is typically more investor-friendly than commingled fund governance:
- Investment committee may include investor representatives
- Key person provisions may be more stringent
- Investor may have veto rights on specific investment types, sizes, or geographies
- Reporting frequency and depth is negotiated to investor specifications
- Side letter provisions (common in commingled funds) are unnecessary — all terms are in the main agreement
Fee Structures
Fund-of-one fees are fully negotiable and typically reflect the investor's leverage:
- Management fees: Often lower than commingled fund fees (0.5–1.5% vs. 1.5–2%), reflecting the larger allocation and reduced fundraising cost
- Performance fees: May be lower (10–15% vs. 20%) or structured with higher hurdle rates
- Fee offsets: Co-investment fees, portfolio company fees, or transaction fees may be fully offset against management fees
- Expense caps: The investor may negotiate caps on fund-level expenses
Comparison
Fund of One vs. Managed Account vs. Commingled Fund
| Feature | Fund of One | Managed Account | Commingled Fund |
|---|---|---|---|
| Legal Structure | Separate fund vehicle (LP, SPC, VCC) | Segregated account owned by investor | Multi-LP fund vehicle |
| Asset Ownership | Fund owns assets | Investor owns assets directly | Fund owns assets |
| Transparency | Full (negotiated) | Maximum (real-time) | Limited (periodic reporting) |
| Customization | High | Highest | Low (same terms for all LPs) |
| Governance | Investor influence | Investor control | Limited LP rights |
| Fee Negotiation | Fully bespoke | Fully bespoke | Standard or side letter |
| Operational Complexity | Moderate | Higher | Lower |
| Manager Preference | Moderate (fund-level track record) | Lower (no commingled track record) | Highest (operational efficiency) |
| Minimum Allocation | $50M+ typically | $100M+ typically | Fund minimum |
Operations
Operational Requirements
Segregated Accounting and Reporting
- Segregated NAV calculation (independent from any commingled fund)
- Investor-specific reporting format, frequency, and content
- Benchmark tracking and attribution analysis tailored to the mandate
- Tax reporting aligned with the investor's tax domicile and requirements
Asset Custody
- The investor may require a specific custodian (often their existing global custodian)
- Prime brokerage arrangements may be directed by the investor
- Custody terms and counterparty limits may be investor-specified
Compliance and Investment Guidelines
Investment guidelines are typically more detailed and restrictive than in commingled funds:
- Specific permitted and prohibited investment types
- Concentration limits by issuer, sector, geography
- Leverage limits
- ESG restrictions and positive screening criteria
- Liquidity requirements (minimum cash allocation)
- Currency hedging policy
Monitoring compliance requires automated pre-trade and post-trade compliance checking systems.
FAQ
Frequently Asked Questions
What is the minimum allocation for a fund of one?
There is no regulatory minimum. Practically, fund-of-one vehicles become economically viable for managers at $50M+ allocations, where the management fee income justifies the operational cost of maintaining a dedicated vehicle. For managed accounts (the most customized version), the typical minimum is $100M+.
Can a fund of one be converted to a commingled fund?
In some cases, yes. A fund of one can be restructured to accept additional LPs, effectively converting it into a commingled fund. This requires amending the fund's governing documents, which the original investor must approve. This is sometimes used by managers who start with a large anchor investor and subsequently open the fund to additional LPs.
How does a fund of one affect the manager's track record?
Fund-of-one performance is typically included in the manager's composite track record (alongside commingled fund performance), subject to GIPS (Global Investment Performance Standards) guidelines. However, if the mandate has materially different investment guidelines from the commingled fund, it may require a separate composite.
Who provides administration for a fund of one?
The same institutional fund administrators who serve commingled funds also provide fund-of-one administration. The key requirement is the ability to deliver customized reporting to the investor's specifications, often integrating with the investor's own portfolio management and risk systems.
Sources: ILPA Principles; GIPS Standards; AIMA Guide to Institutional Investors.