What is Co-Investment?
Short answer: A co-investment allows selected investors to participate directly or through a separate vehicle alongside a lead fund in one transaction. Its rights and economics are distinct from the investor's main fund interest.
Co-investments can increase deal capacity and give investors targeted exposure. The lead fund may own one class or amount, while the co-investment SPV holds another under related terms. Fees, carry, information, governance, follow-ons and exit coordination can differ. An LP's fund commitment does not automatically entitle it to every co-investment, and accepting an allocation creates separate diligence and funding obligations. The portfolio company normally deals with the fund and co-investment vehicle as shareholders, not with each underlying LP. Fund-level performance and co-investment performance should not be combined without a clear, consistent reporting basis.
How it works
The sponsor applies its allocation and conflicts policy, confirms fund capacity and obtains required approvals. Selected investors receive transaction information under confidentiality and a defined timetable. Documents cover commitment, calls, fees, expenses, governance, transfer, follow-on, information, default and exit. The sponsor tracks the main fund and co-investment vehicle separately while coordinating shareholder action where agreed. Common mistakes include offering allocations before the lead fund's approval, giving different investors inconsistent information, assuming no-fee economics means no expenses, failing to reserve follow-on capacity and calculating performance by adding the co-investment to the main fund without accounting for separate cash flows.
Investor participation percentage = investor's funded co-investment amount / total funded amount in the relevant co-investment vehicle, subject to document-specific allocations
Example
A fund invests 80 in a company and offers 20 through an SPV. Four investors are initially allocated 8, 6, 4 and 2. Before closing, the investor allocated 4 declines. Under the documented policy, the sponsor reallocates that 4 pro rata among the three remaining investors, whose final amounts become 10, 7.5 and 2.5. Their participation percentages are 50, 37.5 and 12.5 percent. The SPV later has 5 available for distribution after vehicle expenses, so the amounts are 2.5, 1.875 and 0.625 before investor-specific tax effects. The fund reports its own 80 investment separately from the SPV's 20.
Why it matters
Private-investment teams use co-investment to complete larger transactions and deepen selected LP relationships. LPs use it to obtain deal-specific exposure and must assess concentration, liquidity and diligence rather than relying only on fund underwriting. GPs use transparent allocation and conflicts processes to protect fairness across funds and investors. Portfolio-company boards need a workable shareholder governance structure despite multiple economic participants. Co-investment communication should make clear which information relates to the company, the main fund and the separate vehicle.
Allocation duties, conflicts, securities offering, investment-adviser, tax, anti-money-laundering, sanctions and foreign-investment rules vary. Side letters may grant eligibility or priority but rarely eliminate discretion and deal constraints. Co-investors may have limited diligence time and no direct board rights. Follow-on and exit decisions can create conflicts with the lead fund. Legal, tax and investment advice is required, and each vehicle's documents control its economics, reporting and remedies.