Co-Investments

What a Co-Investment Actually Is

A co-investment is a direct, deal-by-deal allocation made alongside a general partner (the fund manager) into a single transaction — typically a company acquisition, a real estate deal, or a private credit transaction. The investor does not go through the fund vehicle itself; instead, a separate legal entity (often called a co-invest SPV, or special purpose vehicle) holds the capital dedicated to that one deal.

This distinction matters. A limited partner in a standard drawdown fund is diversified across every deal the fund makes, paying management fees and carried interest on all of them. A co-investor in a single deal takes concentrated exposure to one outcome, often at dramatically lower — or zero — fee and carry.

Co-investments are distinct from direct investments, where a family or institution sources, structures, and leads a deal without a fund manager's involvement. Co-investments travel through an existing GP relationship; the fund manager retains control of the deal and the board seat. The co-investor is, in a meaningful sense, a passenger — an informed, sometimes influential one, but a passenger nonetheless.

Why Fund Managers Offer Co-Investments

A private equity fund has a fixed size. When a deal exceeds what the manager wants any single fund to absorb — or exceeds fund concentration limits set in the limited partnership agreement — the manager needs additional capital. Co-investors fill that gap quickly and quietly.

There is also a relationship dimension. Co-investment access has become a competitive tool: managers offer it to reward their most valued LPs, to attract large new commitments, and to build loyalty ahead of the next fundraise. In some cases, a manager may offer co-invest rights in a side letter as a condition of a large fund commitment.

What the manager does not gain from co-investors is management fees or carried interest on those dollars — which is precisely why co-investors find the terms attractive. The economics shift meaningfully in the investor's favor relative to a standard fund structure.

Adverse Selection: The Risk Hiding in the Opportunity

The most serious structural concern around co-investments is adverse selection. The worry is straightforward: managers may share their most attractive deals with no one, keeping 100% of the upside inside the fund; they may offer co-invest access on deals that are too large, too risky, or too difficult to place with other buyers.

This does not mean all co-investment opportunities are impaired — many are genuine, high-conviction positions the manager is eager to build. But investors cannot assume that an offer to co-invest is a signal of quality. Evaluating the deal on its own merits, separately from the relationship, is essential.

One useful frame: does the manager offer co-investments systematically across its portfolio, or only sporadically? Systematic programs with transparent allocation policies tend to raise fewer adverse-selection concerns than one-off offers that arrive under time pressure in unusual circumstances. Reviewing a manager's track record specifically on co-investments — not just fund performance — is part of sound due diligence.

Speed, Staffing, and the Clock Problem

Co-investment opportunities do not wait. A general partner closing a leveraged buyout is operating on a deal timeline set by sellers and lenders, not by co-investors' internal approval processes. An invitation may arrive with a decision window of days — sometimes less than a week.

Families and institutions that cannot respond quickly simply miss deals. This is one reason co-investment programs are often described as operationally demanding: they require standing legal documentation, pre-approved decision frameworks, a team capable of reviewing a confidential information memorandum on short notice, and the authority to wire capital without a lengthy committee cycle.

For families operating through a family office, this means having advisers, legal counsel, and investment staff who can mobilize rapidly. For those relying on a multi-family office or outsourced investment team, understanding how that team handles co-invest timing is a practical question worth asking before the first deal arrives.

The fee savings on a co-investment can be meaningfully offset — or more than offset — if the cost of rapid due diligence, legal review, and monitoring is properly counted. Smaller allocations may not justify the overhead at all.

Concentration Risk and Portfolio Construction

By definition, a co-investment is a single-asset bet. Done once, thoughtfully, this may complement a diversified portfolio. Done repeatedly with the same manager, in the same sector, or in the same vintage period, co-investments can quietly concentrate a portfolio in ways that only become visible during a market stress event.

Concentration risk compounds in at least two dimensions. First, a co-investment may be in the same company or sector as deals already inside the fund — so the investor ends up with more exposure to a single business than the fund's reported position suggests. Second, if a family makes several co-investments with one manager over time, they may develop meaningful economic exposure to that manager's judgment, network, and deal flow quality, almost like an undisclosed fund commitment without the diversification a fund would ordinarily provide.

Families sometimes consider building a co-investment budget into their investment policy statement — defining how much of the total private markets allocation may be deployed as co-investments, in which sectors, and with how many different managers — precisely to guard against this drift.

Building a Thoughtful Co-Investment Program

Institutions that do co-investing well rarely treat it as a passive benefit of fund investing. They build programs. The elements of a structured approach often include:

• Relationship breadth: Maintaining fund commitments across multiple managers in different strategies, which widens the universe of potential co-invest opportunities and reduces dependence on any single GP.
• Internal capacity: Dedicated staff or advisers capable of assessing individual transactions — not just fund-level due diligence — including operating company analysis, leverage review, and sector expertise.
• Pre-negotiated documents: Framework agreements or standardized co-invest terms negotiated in advance, so legal review at deal time is a check rather than a starting point.
• Allocation tracking: Systematic records of co-invest positions, their sector exposures, manager concentrations, and performance — separate from fund reporting — so the true portfolio picture remains clear.
• Pass discipline: The explicit ability — and organizational culture — to decline an opportunity without damaging the LP relationship. A manager worth working with long-term understands that a thoughtful no is preferable to a distracted yes.

For families earlier in their private markets journey, co-investing through a secondaries manager or a structured co-investment program offered by a multi-family office may be a way to access the return and fee characteristics without building the full internal infrastructure immediately.

Tax and Structural Considerations

Co-investments typically flow through SPV entities that generate their own tax reporting, often including Schedule K-1 forms. The timing, character, and jurisdiction of income can differ from what the underlying fund produces, adding complexity to an already layered tax picture.

Investors should confirm early in the process how a co-investment will be held — directly, through a trust, through an entity — because unwinding a structure after closing is rarely straightforward. For taxable accounts, the cost basis, holding period, and treatment of any deal expenses all require careful tracking. A qualified CPA and legal counsel familiar with private market structures should be involved before any co-investment closes.