US private equity zombie funds — funds that have exceeded their operational period without disposing of assets — reached a record $348.5 billion in net asset value by the end of 2025, according to market research firm Pitchbook. The surge stems from high interest rates and a prolonged downturn in the mergers and acquisitions market, which have delayed asset sales. Institutional investors including pension funds and insurance companies now face mounting challenges in recovering their committed capital.
US Private Equity Funds Surpass 10-Year Threshold at Record Scale
Pitchbook data shows that the net asset value locked in US private equity funds established over 10 years ago reached $348.5 billion by the end of 2025. These funds, commonly referred to as zombie funds in the industry, have failed to complete asset disposals within their standard operational timelines. The figure represents the highest level on record for funds in this category.
High Interest Rates and M&A Slowdown Delay Asset Disposals
The accumulation of zombie fund assets is directly linked to persistent high interest rates and a stalled mergers and acquisitions market. Elevated borrowing costs have reduced buyer appetite for leveraged acquisitions, while valuation gaps between sellers and potential acquirers have widened. These conditions have prevented private equity firms from executing planned exits through sales or public listings, forcing funds to hold portfolio companies beyond their intended investment horizons.
Institutional Investors Face Capital Recovery Challenges
Pension funds and insurance companies that committed capital to these private equity vehicles are experiencing significant delays in receiving distributions. The extended holding periods disrupt institutional investors' liquidity planning and portfolio rebalancing strategies. As funds remain unable to monetize their holdings, limited partners face uncertainty regarding the timing and ultimate returns of their investments.
FAQ
What are private equity zombie funds?
Private equity zombie funds are investment vehicles that have exceeded their standard operational period — typically 10 years — without successfully disposing of their portfolio assets. These funds continue to hold investments beyond their intended exit timelines, unable to return capital to investors.
Why did US private equity zombie funds reach record levels by the end of 2025?
According to Pitchbook, zombie fund assets hit $348.5 billion by the end of 2025 due to high interest rates and a prolonged downturn in the mergers and acquisitions market. These conditions delayed asset sales and prevented private equity firms from executing planned exits.
How does the zombie fund situation affect institutional investors?
Institutional investors such as pension funds and insurance companies face difficulties recovering their committed capital from these funds. The extended holding periods disrupt their liquidity planning and create uncertainty regarding investment returns and distribution timing.
