Millefili, founded in 1981 in Carpi (Modena, Emilia Romagna) by Francesco Galli, develops, produces and markets yarns, often specifically and exclusively designed. It serves the Italian market, as well as Europe and the US. Millefili was initially founded as a distributor of yarns for the knitwear industry, before subsequently evolving into a manufacturing company. It stands out from the competition due to its creativity, ability to capture fashion trends, and its high level of services. These factors have allowed Millefili to grow and establish itself as a leader in the core business. The company serves leading international brands in the fashion and luxury industries.

In June 2025, Alto Capital IV has divested its entire stake in Millefili to Armònia SGR.