According to the WSJ, Leica Camera sold 44% of the company to Blackstone for €130 million ($179 million):
“Though the price wasn’t disclosed, the deal is valued at roughly €130 million ($179 million), according to a person close to the matter.”
In 2004 Dr. Kaufmann, bought 95% of the company for approximately €60 million ($82 million):
“Mr. Kaufmann, a German aristocrat who lives in Austria, bought into the company in 2004 and increased his stake shortly thereafter to more than 95%, with an investment exceeding €60 million, according to people close to him.”