A manager has a deal that is larger than its fund can comfortably take. Its concentration limits say no single position should exceed a certain share of the fund. The deal is attractive and the manager wants it.
The solution is co-investment: the manager invites its investors to put money directly into that specific company, alongside the fund, usually through a separate vehicle and usually on reduced or no fees.
For the investor, this is one of the few genuinely attractive fee propositions in private markets. It is also considerably harder to execute well than it appears.
The mechanics
The offer. A manager identifies a transaction requiring capital beyond what the fund will commit and offers participation to some or all of its limited partners.
The vehicle. Co-investors typically invest through a dedicated SPV that holds the position alongside the fund.
The economics. Frequently no management fee and no carried interest, or substantially reduced versions of both. Terms vary and some managers do charge.
The timeline. This is the operational challenge. Co-investment decisions are usually required on a compressed schedule, because the underlying transaction has its own deadline. An investor may have weeks, sometimes less, to underwrite a single company and commit capital.
The exit. The co-investment generally exits alongside the fund position, on the same terms and timing. The co-investor is a passenger on that decision.
Why it is attractive
The fee arithmetic is the main event. A fund investor pays management fee and carry on every dollar. A co-investor paying neither keeps the gross return on the co-invested capital. Compounded across a programme, this is a large and reliable advantage — reliable in the sense that it does not depend on the deals being better, only on the fees being lower.
Concentration where wanted. An investor with conviction on a particular company or sector can express it directly rather than diluting it across a fund portfolio.
A shortened J-curve. Capital is deployed into a specific transaction immediately, without funding a fee load on uninvested commitments.
Relationship value. Co-investment programmes create closer engagement with managers, which has downstream benefits in access and information.
The risks, taken seriously
Adverse selection. The concern is straightforward: are the deals offered as co-investment the ones the manager is least excited about?
The honest answer is that the evidence is mixed and the structural argument cuts both ways. The mechanical explanation — deals too large for fund concentration limits — is real, verifiable, and unrelated to conviction. A manager offering co-investment on a large transaction is usually doing so because of arithmetic, not doubt.
But a manager could use co-investment to reduce exposure to a deal it has become less certain about, and an investor cannot easily tell the difference from outside. The practical mitigations are to ask directly why this deal is being offered, to check whether the fund is taking its full concentration limit, and to look at whether the manager has offered co-investment consistently over time or selectively.
Concentration. A co-investment is a single company. One transaction going badly can wipe out the fee advantage across several that went well. Co-investment is properly a portfolio strategy requiring enough deals to diversify, not a way to make a few concentrated bets.
Underwriting burden. The investor must analyse a specific business on a compressed timeline. Investors who cannot do this genuinely — and many cannot — are effectively relying on the manager analysis while taking concentrated single-asset risk. That is a worse position than being in the fund.
No control and no influence. The co-investor generally has no governance rights, no say in the exit, and limited information rights. It is along for the ride.
Capital readiness. Co-investment demands capital available on short notice, which means holding liquidity — a cost that partly offsets the fee saving.
Timing and vintage concentration. Co-investment flow is lumpy and correlates with market activity, so a programme built opportunistically can end up concentrated in whatever period happened to be busy.
What it takes to do this well
Institutional investors who run successful co-investment programmes generally have four things:
- Underwriting capability — people who can analyse a company quickly and say no.
- Speed — a decision process that fits the deal timeline, with pre-agreed authority.
- Scale — enough capital to build a diversified portfolio of co-investments rather than a handful.
- Deal flow — relationships across enough managers to see consistent opportunities and be selective.
The fourth is the constraint that most often binds. An investor seeing three co-investments a year cannot be selective and cannot diversify. An investor seeing many can decline the ones it does not like, which is where most of the value actually comes from — the ability to say no is worth more than the fee saving.
For investors without those capabilities
Most investors do not have all four, and the honest answer is that co-investing anyway is a mistake rather than an opportunity.
The alternative is a co-investment fund — a vehicle that assembles a diversified portfolio of co-investments professionally. This reintroduces a fee layer, which removes some of the core advantage, and it still typically costs less than the underlying fund fees would have.
Whether that trade works depends on the fee level and on execution quality. The comparison worth making is not co-investment fund versus direct co-investment — which is not a real choice for most investors — but co-investment fund versus simply committing more to primary funds.
For advisers
Co-investment is sometimes presented to individual investors as access to institutional-quality opportunity. Two questions are worth asking before accepting that framing:
Is the investor able to diversify? A client who can participate in two co-investments is taking concentrated single-company risk, not running a strategy.
Who is underwriting? If nobody in the chain is independently analysing the company, the position is a leveraged bet on one business selected by someone else, held without governance rights or liquidity.
Co-investment is a genuinely good structure for investors equipped for it. It is not a strictly better version of fund investing available to everyone.
This guide is educational and general; it is not investment advice. Co-investment terms vary materially; review the specific documents and consult qualified advisers.
Frequently Asked Questions
What is co-investment?
Direct investment by a fund investor into a specific portfolio company alongside the fund itself, usually through a separate vehicle and typically on reduced or no fees. It gives the investor concentrated exposure to one deal rather than to the whole fund portfolio.
Why do managers offer co-investment?
Usually because a deal is larger than the fund can or should take alone given its concentration limits. Offering co-investment lets the manager pursue the transaction without breaching those limits, and it strengthens relationships with investors who may commit to future funds.
Are co-investments free of fees?
Often they carry reduced or no management fee and carried interest, which is the main attraction. Terms vary and some managers charge on co-investment. The absence of a second fee layer is what makes co-investment economically attractive relative to the fund itself.
What is the adverse selection risk?
The concern that the deals offered as co-investment are the ones the manager is less enthusiastic about, or that are being offered because the manager wants to reduce its own exposure. The counterargument is that co-investment is usually driven by deal size relative to fund concentration limits, which is a mechanical reason unrelated to conviction.
What does an investor need to co-invest well?
The ability to underwrite a single company on a compressed timeline, capital available on short notice, sufficient scale to build a diversified co-investment portfolio rather than a few concentrated bets, and a relationship that generates consistent deal flow. Investors lacking any of these are generally better served through a co-investment fund.
Sources
- Internal Revenue Code Subchapter K (partnerships)
- Institutional Limited Partners Association (ILPA) guidance on co-investment
- Investment Advisers Act of 1940, Section 206
