B K Birla group company Kesoram Industries saw a churn in ownership on Friday as Frontier Warehousing Limited moved to acquire a controlling stake, marking the exit of the Birla family from the company after demerging and divesting its cement business to the Kumar Mangalam Birla-led UltraTech Cement earlier this year. Shares of Kesoram jumped 19.85 per cent to Rs 6.52 after Kolkata-based Frontier Warehousing announced an open offer to buy 8.07 crore shares, or 26 per cent of the company, at Rs 5.48 apiece. The offer follows a share purchase agreement under which Frontier Warehousing will acquire 13,29,69,279 shares from Kesoram's Birla-controlled promoter group entities at Rs 4 per share.