Burton's Biscuit Co., the UK firm behind brands including Maryland cookies and Jammie Dodgers, is up for sale. The first round of bidding has been completed and rumoured suitors include private-equity firms Apax Partners and CapVest, Canadian fund Ontario Teachers Pension Plan and Fox's biscuits owner 2 Sisters Food Group. Stefan Kirk of M&A advisors Glenboden suggests another private-equity firm, Bridgestone, which has just bought a biscuit business in Poland, should look at Burton's, too.