Private equity capital has increasingly concentrated in mega-buyout funds, driven by investor preferences for scale, brand recognition, and operational simplicity. While these large funds offer institutional familiarity, their size introduces structural challenges that may limit return potential.
As funds grow, the universe of viable deals shrinks. Mega-buyout funds must deploy billions of dollars across a small number of large companies, often competing aggressively in auction processes that push entry valuations to record levels. Median purchase multiples reached 11.8× EBITDA in 2025, raising the bar for value creation and compressing margins of safety.
Performance data increasingly reflects these structural pressures. Between the 2019 and 2021 vintages, the fifteen largest buyout funds delivered a median IRR of 10.0%, compared with 16.3% for the rest of the market. At the same time, exit bottlenecks have extended holding periods to 6.5–8.5 years and created a backlog of more than 16,000 PE-backed companies globally.
Middle-market private equity offers a contrasting dynamic. With a broader universe of companies, lower entry multiples, and greater opportunity for operational improvement, the segment continues to demonstrate stronger EBITDA growth and greater performance dispersion.
For advisors and allocators, the implication is clear: private equity allocations should not default to the largest funds. A more thoughtful approach considers fund size, vintage diversification, and manager selection in order to capture the true illiquidity premium private markets are intended to deliver.