Funds of One: Structure, Governance and Negotiation for a Single-Investor Cayman Vehicle

Between the separately managed account and the commingled fund sits a structure that large allocators increasingly ask for by name: the fund of one. A dedicated vehicle, in Cayman most efficiently a segregated portfolio within an SPC, with a single investor, customised terms, and the full apparatus of a fund: independent governance, administration, audit and a real NAV. For the allocator it delivers control and transparency without the operational burden of running its own account; for the manager it preserves the track record, the governance story and much of the economics that an SMA erodes. This article covers when a fund of one is the right answer, how to structure it, and the negotiation points that decide whether it strengthens or hollows out the manager's business.

"The fund of one is the structure that lets both sides keep what they care about most: the allocator gets segregation and bespoke terms, the manager keeps the fund wrapper, the governance and the track record. The negotiation is really about who controls the perimeter."Tessa Cruz, Director at CV5 Capital

Why This Matters for Funds and Managers

Demand for dedicated vehicles is a direct consequence of the managed account renaissance we analyse in SMAs vs commingled funds: allocators want transparency, control and custom terms, but many do not want to operate custody, trading agreements and reconciliation in-house. A fund of one outsources that operational surface back into a fund structure while keeping the exposure dedicated. For managers, it is frequently the best counter-offer to an SMA request, and for certain investors, insurers, sovereign entities, large family offices with structural or regulatory constraints, it is the only workable format for a large ticket.

Structure choice determines the economics. Built standalone, a fund of one carries the full cost stack of a fund for one investor, which either the ticket subsidises or the manager absorbs. Built as a segregated portfolio on an existing SPC platform, it inherits governance, administration, audit and banking arrangements at incremental rather than full cost, the same arithmetic set out in our SPC versus standalone comparison, with statutory segregation of assets and liabilities between portfolios.

The Common Misunderstanding

Managers often treat a fund of one as "the fund, copied, for one investor", and allocators sometimes treat it as "an SMA with a wrapper". Both miss the governance reality: it is a fund, with directors who owe duties to it, an administrator striking an independent NAV, an auditor, and offering and constitutional documents that bind both sides. That is precisely its value, the investor gets fund-grade controls without building them, and the manager gets a governed vehicle rather than a client relationship terminable by lunchtime. But it also means the investor's control has limits: a sole investor can negotiate terms, information and consent rights, yet the vehicle's governance cannot simply be delegated to them without collapsing the distinction, and the fund's governance substance is what later allocators, and regulators, will look at.

The Practical Reality: SMA, Fund of One and Commingled Fund Compared

The Negotiation: Terms That Decide the Deal

Fees come first. A sole investor writing a large ticket expects economics below commingled terms, and usually gets them; the manager's floor is set by incremental cost plus a genuine contribution to the business, with the discipline described in our work on break-even revenue. Check the read-across: if the flagship fund's side letters carry MFN clauses, confirm that a dedicated vehicle's terms sit outside their scope, and draft to keep it that way.

Then the perimeter of control. Reasonable investor asks: full transparency, agreed investment guidelines, consent rights over guideline changes, fee changes and key person events, and defined exit mechanics. Asks to resist: investor discretion over individual trades (which converts the fund into an advisory relationship and undermines its integrity), vetoes over the manager's ordinary business, and drafting that makes the fund's directors answerable to the investor rather than the vehicle. Liquidity and wind-down deserve as much drafting attention as fees: minimum commitment periods, notice for full redemption, how illiquid tail positions are handled, per the mechanics in fund liquidity tools, and who bears wind-down costs. Finally, key person and capacity: the investor will want protections, mirroring the seed-style terms we map in anatomy of a seed deal; the manager should ensure they are triggers for consultation and exit, not for control.

Key Considerations

How the CV5 Platform Model Helps

CV5 provides governance, compliance and operating infrastructure as platform manager; it does not make investment decisions for third-party strategies and is not a law firm, administrator, auditor or investment adviser. Managers retain their strategy, branding and investment discretion; investors subscribe into the relevant segregated portfolio, not CV5 Capital. The model is described at fund manager formation.

Risks and Caveats

A fund of one has tax, regulatory and accounting consequences for both parties that depend on the investor's jurisdiction and status, US investors in particular raise specific considerations, and the vehicle's Cayman regulatory treatment depends on its terms; single-investor vehicles may fall outside the Mutual Funds Act registration regime or within it depending on structure, which counsel should confirm. Concentration is the manager's structural risk: a business built on one or two funds of one is exposed to those relationships in a way a commingled register is not. And governance must be real, not decorative; a dedicated vehicle whose directors defer to its investor on everything will not withstand regulatory or ODD scrutiny.

Key Takeaways

• A fund of one gives allocators segregation, transparency and bespoke terms inside a governed fund wrapper, and is often the manager's best counter to an SMA request.
• Built as a segregated portfolio on an SPC platform, it launches quickly and runs at incremental rather than full-stack cost.
• Negotiate guidelines and consent rights, never trade-level investor discretion; the fund's governance integrity is the product.
• Draft exit, illiquid-asset and wind-down mechanics at launch, and keep dedicated-vehicle terms outside flagship MFN scope.
• Secure written track record rights and a documented allocation policy across all vehicles from the first trade.

Frequently Asked Questions

What is a fund of one?

A fund of one is a pooled-fund structure with a single investor: a dedicated vehicle, commonly a Cayman segregated portfolio or exempted company, in which one allocator holds all the participating shares. It combines fund-grade governance, administration and audit with SMA-style customisation of strategy, fees, transparency and liquidity.

How is a fund of one different from a managed account?

In a managed account the client owns the assets and the custody arrangements, and the manager holds trading authority over someone else's account; in a fund of one the vehicle owns the assets, an administrator strikes an independent NAV, directors owe duties to the fund, and the investor's rights are defined by fund documents. The fund of one shifts the operational burden off the investor and keeps the track record inside the manager's fund family.

How much does a fund of one cost to run?

Standalone, it carries a full fund cost stack, directors, administration, audit, legal and regulatory fees, for a single investor, which only very large tickets justify. As a segregated portfolio on an existing SPC platform the incremental cost is a fraction of that, because governance and service provider arrangements are shared platform infrastructure, which is what makes the structure viable at institutional but not enormous ticket sizes.

Does a single-investor Cayman fund need CIMA registration?

It depends on the structure and its terms. Cayman's regulatory regimes turn on features such as redeemability, the number of investors and minimum investment levels, and a segregated portfolio within a registered SPC umbrella sits inside that umbrella's regulatory framework. The registration analysis should be confirmed with Cayman counsel for the specific design rather than assumed either way.