Pinault who married Hayek last month was held for an hour by 50 staff after a meeting in Paris until freed by riot police, Mirror Online reported.
The 46-year-old billionaire who has shares in Gucci, Converse and Christie's auction house among others, has a young daughter Valentina with the 42-year-old Freida star.
Pinault was the fifth "boss-napping" victim in a month during times of unrest as organisations lay off employees due to the ongoing recession.
Text: PTI | Photograph: Manuel Silvestri/Reuters