Partners Group shares plunged as much as 18% on Wednesday after the Swiss private-equity firm capped investor withdrawals from its flagship Global Value Sicav fund. The company limited redemptions to 5% in the second quarter when requests reached nearly 10% of the fund's $8.6 billion value. This marks the steepest daily decline since Partners Group's 2006 listing, with shares down more than a third year-to-date.

The buyout-focused fund invests in private equity and debt across hundreds of companies. Partners Group pioneered structures allowing wealthy individuals to access private-market investments previously reserved for institutional investors. Most funds permit quarterly withdrawals, but mounting redemption pressure has forced this unusual restriction on the $8.6 billion vehicle.

Investor concerns center on potential management fee losses as private markets face headwinds. The firm manages assets across Europe and the U.S., with its regional headquarters outside Denver. Clients are pulling money amid broader jitters toward private markets, particularly in private credit.

CEO David Layton told Bloomberg TV the redemption limits reflect market sentiment, not performance issues. He noted redemption pressure in private credit is spreading to other asset classes. The share drop signals waning appetite for private-market exposure among wealthy investors.