Shares of Zandu Realty will turn ex-date on Thursday for the proposed amalgamation with Emami Infrastructure. The latter will issue seven shares for every one share of ₹100 each held in Zandu Realty. Investors wishing to receive Emami shares need to own Zandu Realty shares by Wednesday, as the company has fixed May 25 as the record date. While the shares of Emami jumped 12.3 per cent to ₹278, those of Zandu gained 6.5 per cent at ₹1,876.35 on the BSE.