Co-investment, the right to put capital directly into a deal alongside a fund with reduced or no fees, has become one of the most sought-after privileges in the allocator toolkit. It lowers the blended cost of a private-market programme and gives the allocator a closer look at how a manager actually works.
The economics are compelling. By deploying a meaningful share of capital fee-free through co-investments, a large allocator can cut the effective cost of its whole private-market book, a saving that compounds powerfully over time.
The concentration trap
The danger is that co-investments concentrate risk. A fund spreads capital across many deals; a co-investment doubles down on one. An allocator that piles into the co-investments a manager offers most eagerly may find its portfolio quietly concentrated in exactly the deals the manager was most keen to share the risk on.
Adverse selection lurks here. The deals a manager most wants to syndicate are not always the ones it is most confident in. The disciplined co-investor builds its own view rather than assuming that an invitation is an endorsement.
Doing it well
The allocators who co-invest successfully treat each opportunity as a fresh underwriting decision, staff the capability to say no, and size positions so that a single sour deal cannot damage the programme. Those who treat the fee break as a free lunch learn, eventually, that there is no such thing.
Co-investment will keep growing because the fee logic is real and the access is valuable. But the allocators who thrive are the ones who remember that a discount on fees is not a discount on risk.