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Endowments & Foundations: Reframing Private Markets

Reported by Mercer
Oct 21, 2025· 2 min read
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Key Takeaways
  • • Large endowments and foundations maintain private markets allocations at 30% or more of portfolios, with institutions exceeding $1 billion in assets averaging 46% allocation to private markets, reflecting a structural commitment to illiquidity premiums and diversification despite recent performance headwinds.
  • • Distribution slowdowns in 2019–2021 vintage private equity funds have been pronounced, yet earlier vintages continue to meet or exceed modeled return expectations, indicating performance cycles are normal and long-term return premiums across private equity, private debt, real estate, and infrastructure remain intact.
  • • Institutions must re-underwrite private market assumptions dynamically, as recent years have exposed reliance on outdated liquidity assumptions and inconsistent distribution patterns that no longer align with prior cycle models, requiring stress-testing and rational recalibration of underwriting expectations.
  • • The case for private markets in endowment and foundation portfolios remains sound, but strategic evolution is essential as macro uncertainty and shifting liquidity dynamics create pressure for thoughtful approach redesign rather than wholesale portfolio reallocation.
Summary
Endowments and foundations continue to regard private markets as a foundational component of long-term portfolio construction, despite recent volatility and distribution headwinds that have prompted institutional reassessment. According to Mercer's analysis, these allocations typically comprise 30% or more of E&F portfolios, with larger institutions ($1 billion and above) maintaining average exposures of 46% to private markets. This substantial allocation reflects a disciplined philosophy centered on capturing illiquidity premiums, enhancing diversification, and gaining exposure to structural growth drivers—a strategy that remains strategically sound despite cyclical challenges.

However, the performance landscape has shifted materially. Private equity funds from 2019–2021 vintages have experienced pronounced distribution slowdowns and valuation recalibrations, particularly in real estate and venture capital. Despite this near-term pressure, earlier vintages continue to meet or exceed their modeled return expectations, reinforcing the thesis that long-term return premiums across private equity, private debt, real estate, and infrastructure remain viable. This bifurcation in performance underscores that cyclicality is inherent to private markets rather than indicative of structural deterioration.

The critical challenge for institutional investors lies in portfolio re-underwriting. Private market programs have revealed inconsistency in returns driven by abnormal distribution patterns and liquidity assumptions that no longer hold in practice. Many institutions built their private markets strategies on vintages with more favorable liquidity profiles, assumptions that current cycle dynamics have invalidated. Mercer's framework emphasizes dynamic program management and stress-testing of private markets playbooks to align underwriting with current macro conditions, liquidity realities, and distribution constraints rather than historical precedent. This rational re-underwriting approach enables endowments and foundations to maintain exposure to private markets while acknowledging that new assumptions and portfolio management disciplines are required to navigate shifting volatility and spending pressures in an uncertain macroeconomic environment.

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Sources

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Mercer Endowments & Foundations: Reframing Private Markets