Following a market regulator's ruling prohibiting him from participating with any listed firm, Reliance Group Chairman Anil Ambani resigned as director of Reliance Power and Reliance Infrastructure on Friday. "Anil D Ambani, the non-executive director, steps down from the board of Reliance Power in compliance of SEBI (Securities and Exchange Board of India) interim order," Reliance Power said in its regulatory filing. "The Board looks forward to an early closure of the matter and inviting Mr. Ambani back to provide his vision and leadership to the Company in the interest of all stakeholders," it further stated, adding that it noted that during the past 1 year, "the company has created immense value for its over 36 lakh shareholders with the stock price increasing from a low of Rs. 4 to a high of Rs. 19 (375%)."