Treasury shares stock of the Budapest Stock Exchange's four blue chips changed little between the end of February and the end of March, data published by the companies show. OTP Bank had 4,097,092 treasury shares at the end of March, up from 4,085,532 a month earlier. The shares accounted for 1.46% of registered capital. Drug maker Richter's treasury share stock rose to 56,277 shares at the end of March from 56,153 a month earlier. The stock made up 0.3% of registered capital. The number of treasury shares held by oil and gas company MOL and Magyar Telekom were unchanged, at 4,627,512 (4.43% of registered capital) and 390,862 shares (0.04% of registered capital), respectively.