Sarana Menara Nusantara Buyback. A limited liability company engage in investment and telecommunications support services in Indonesia. PT Sarana Menara Nusantara Tbk (TOWR) has begun executing the share buyback. Base on the disclosure of company information. Monday (17/8), TOWR carry out a buyback of 84.93 million shares during the period August 7 to August 13, 2020.