Shares in drugmaker Cipla gained on Monday after its April-June operating margins beat some estimates.. The company's margins expanded sequentially by nearly 4 percentage points to 20 per cent.. Investors said management maintained revenue guidance of mid-teens growth and 20 per cent margins in FY15 in a conference call.. Strong growth in India and better product mix will further aid margins, fund managers added.. Cipla shares ended 5 per cent higher at Rs 471.05.. Copyright: Thomson Reuters 2014