French midfielder, Mathieu Flamini has told The Sun he is the co-founder of GF Biochemicals, the first company worldwide that can mass produce oil-substitute Levulinic Acid.
According to him he has been keeping a secret from his team-mates for seven years.
He mentioned Pasquale Granata as his business partner who he hooked up with after he left the Gunners to join AC Milan in 2008.
The 31-year-old said he splashed out millions of money to launch the company, which is named after its two pioneers.
GF Biochemicals now employs 400 workers, with 80 based at their plant in Caserta, Italy, operating in a market worth around £20billion.
The Arsenal player admits his mum and dad, pals and even his Arsenal manager never knew he was involved in such a business venture.
The company which has close links with the University of Pisa's chemistry department boasts of workers from around the globe, including France, Italy, Russia, Holland, Germany and Egypt.
However, the ex-Marseille and AC Milan man admits it's been a difficult path. "When you start something like that and you spend so much money, and where there is risk there is stress.