Family Office Co-Investment Fund: Formalising Informal Investment Structures

From Informal Syndicates to Regulated Structures

Family offices frequently co-invest alongside one another. A principal identifies an opportunity — a private company, a real estate project, a venture investment — and invites other families to participate. Historically, these arrangements have been documented through ad hoc shareholder agreements, joint venture contracts, or in some cases little more than a handshake and a wire transfer.

As co-investment activity scales and the number of participating families grows, the limitations of informal arrangements become apparent. Governance is unclear, valuation disputes arise, exit rights are ambiguous, and the tax treatment may be suboptimal. Formalising the co-investment programme through a regulated fund structure resolves these issues and creates a platform that can be scaled to include external capital.

Why Formalise?

The decision to move from informal co-investment to a fund structure is driven by several factors:

Governance and fiduciary standards: A regulated fund imposes a governance framework — including independent directors, an administrator, a custodian, and an auditor — that protects all participants and provides a clear chain of accountability. Decision-making authority is defined in the fund's constitutional documents rather than negotiated bilaterally for each deal.

Investor protection: Each participating family receives the same offering document, subscription agreement, and investor rights. Side letters can accommodate bespoke requirements, but the baseline protections are standardised. This is particularly important when the group includes families with different levels of investment sophistication.

Scalability: An informal co-investment group of 3–5 families can function with bilateral agreements. At 10–20 participants, the administrative burden becomes unmanageable without a fund structure. A fund allows the group to grow without re-documenting every arrangement.

External capital: If the co-investment programme proves successful, the family offices may wish to accept capital from external investors — institutions, other family offices, or high-net-worth individuals. A regulated fund structure is a prerequisite for raising third-party capital in most jurisdictions.

Tax efficiency: A properly structured fund can provide tax-efficient exposure to the underlying investments. For example, a Cayman Islands exempted limited partnership provides pass-through tax treatment, allowing each family to be taxed in its home jurisdiction without an entity-level tax. A Luxembourg SCSp achieves similar transparency for European families.

Estate and succession planning: Family offices often use fund structures as part of intergenerational wealth transfer. Interests in a fund can be transferred, gifted, or placed in trust more readily than direct interests in underlying companies or assets.

Common Structures

The choice of fund structure depends on the investment strategy, the families' tax residency, and the intended investor base:

Cayman Islands Exempted Limited Partnership (ELP): The most common structure for multi-family co-investment funds investing in private equity, venture capital, or real estate. The general partner (typically controlled by the lead family or an appointed investment manager) makes investment decisions. Limited partners (the co-investing families) have limited liability and receive tax-transparent treatment. The fund registers with CIMA under the Private Funds Act, 2020, if it has more than 15 investors or accepts commitments from non-qualifying investors.

Cayman Islands Exempted Company: Used for open-ended, liquid strategies where the families co-invest in a portfolio of listed securities or hedge fund allocations. Registered under the Mutual Funds Act (as revised) if it meets the regulatory thresholds.

Luxembourg SCSp (Societe en Commandite Speciale): A tax-transparent limited partnership popular with European family offices. The SCSp is not subject to Luxembourg corporate income tax, and each partner is taxed on their share of the fund's income in their home jurisdiction. When structured as a RAIF, the SCSp benefits from the AIFMD marketing passport for distribution to professional investors across the EU.

Singapore VCC: Increasingly used by Asian family offices for co-investment programmes. The VCC's sub-fund capability allows different investment themes or strategies to be ring-fenced within a single vehicle.

BVI Business Company: A cost-effective option for smaller co-investment groups (under US$20M) that do not require institutional-grade infrastructure.

Deal-by-Deal vs. Blind Pool

Family office co-investment funds can be structured as either:

Deal-by-deal funds: Each investment opportunity is presented to the participating families, who may choose to invest or pass on a deal-by-deal basis. This preserves family control over capital deployment but creates administrative complexity (each deal requires a separate closing, capital call, and documentation). Deal-by-deal structures are often implemented through a series of SPVs rather than a single fund.

Blind pool funds: Families commit capital to the fund, and the investment manager deploys capital according to the investment mandate without requiring approval for each transaction. This is operationally simpler and gives the manager greater flexibility but requires a higher level of trust between the families and the investment manager.

Hybrid structures: Some co-investment funds operate with a small blind pool for opportunistic investments alongside a deal-by-deal programme for larger transactions. The offering document specifies the circumstances under which each mechanism applies.

Governance Considerations

The governance framework for a family office co-investment fund must balance the families' desire for involvement with the operational efficiency of a professional fund structure:

• Advisory committee: A committee of family representatives (typically the largest participants) that advises the general partner or investment manager on investment decisions, conflicts of interest, and valuation matters. The advisory committee is consultative, not decision-making, in most structures
• Investment committee: The formal decision-making body for investments, typically comprising the investment manager's principals plus one or two external members
• Reporting and transparency: Family offices expect higher levels of transparency than typical institutional investors. Monthly reporting, portfolio-level detail, and access to underlying deal documentation are standard expectations
• Conflict of interest management: Where one family's principal serves as the investment manager, conflicts between the manager's interests and the co-investing families' interests must be managed through formal conflict policies, related-party transaction restrictions, and advisory committee oversight

Fee Structures

Co-investment fund fees are typically lower than standard fund terms, reflecting the relationship between the participating families:

• Management fee: 0.5%–1.5% on committed capital (for PE-style structures) or on NAV (for open-ended structures). The lead family often charges a reduced or zero management fee
• Performance fee: 10%–20% above an 8% preferred return (hurdle rate) with full catch-up, for PE-style structures. Open-ended structures may use a high-water mark without a hurdle
• Deal fees: Transaction fees, monitoring fees, and break-up fees may be charged by the investment manager and offset against the management fee. Full offset is the standard for institutional-quality structures
• Expense pass-through: The fund typically bears its own operating expenses (administration, audit, legal, custody) directly, rather than these being absorbed into the management fee

Costs of Establishment

• Legal structuring: US$80,000–US$200,000 depending on the complexity of the fund terms, the number of jurisdictions involved, and whether a RAIF or other EU structure is required
• Fund administration: US$40,000–US$80,000 per annum for a mid-complexity fund
• Audit: US$15,000–US$40,000 per annum
• Regulatory fees: US$4,268 per annum (CIMA) for Cayman structures; EUR 3,500–EUR 5,000 for Luxembourg structures
• Ongoing legal and compliance: US$15,000–US$30,000 per annum

Key Takeaways

• Family office co-investment funds formalise informal syndication arrangements, providing standardised governance, investor protection, and scalability
• The Cayman ELP, Luxembourg SCSp, and Singapore VCC are the most common structures, each offering tax-transparent treatment appropriate to the families' tax residency
• Deal-by-deal structures preserve family control but create administrative complexity; blind pool structures provide operational efficiency but require greater trust in the investment manager
• Fee structures are typically concessionary compared to standard funds, with management fees of 0.5%–1.5% and performance fees of 10%–20%
• An advisory committee of family representatives provides governance oversight without creating operational bottlenecks in the investment process
• Formalisation creates a platform that can be scaled to accept external capital from institutions and other family offices, transforming a private co-investment group into a professional fund management business