Shares of Motherson Sumi Systems will turn ex-bonus on Thursday. That means, those buying the shares till Wednesday will get the bonus shares. The company is rewarding its shareholders with a 1:2 (one bonus share for every two existing shares) bonus issue. The move will benefit about 59,100 individual shareholdes who own 6.61 per cent stake in the company. The board of Motherson Sumi will meet on August 6 to consider the unaudited financial results for the quarter ended June 30.