Scam-hit Pyramid Saimira Theatre Ltd has informed the Bombay Stock Exchange that P.S. Saminathan, who was barred by the capital market regulator Sebi recently, is stepping down as chairman of the company. He will, however, continue as managing director. N. Narayanan, a promoter-director of the company, will take over as chairman with immediate effect. The board has also approved the merger of…