Shares of three companies - Petronet LNG, Plastiblends India and Sanwaria Agro Oils - will turn ex-bonus on Monday. All three firms are rewarding shareholders with an offer of one bonus share for every share held. For investors wishing to receive the bonus shares, Friday is the cut-off date, as Tuesday (July 4) is the record date. This is the third bonus issue from Sanwaria Agro, and the first from the two others.