Buyout firm Exponent Private Equity is offering a portion of its investment in machinery supplier HSS to co-investors, a move increasingly popular with limited partners as it can cut fees and boost returns.

According to two Europe-based investors, Exponent is currently offering up co-investment positions on HSS, with one adding that up to 10% of the equity investment was being made available. Exponent declined to comment but a person close to the firm said that it often syndicated equity on its deals where "it made sense for both parties".