Carlyle to acquire major stake in Rigaku Corporation Industry News: Carlyle to acquire major stake in Rigaku Corporation 07 Jan 2021 Rigaku Corporation has announced that global investment firm The Carlyle Group and Mr. Hikaru Shimura, President and CEO of Rigaku, has agreed to jointly acquire all outstanding shares of Rigaku, through a holding company to be newly set up by Carlyle and Mr. Shimura. Carlyle is expected to own approximately 80% and Mr. Shimura approximately 20% of the new entity. The investment will be made by Carlyle’s fourth Japan buyout fund, Carlyle Japan Partners IV. Financial details of the transaction have not been disclosed.