Biosig Technologies, Inc. (NASDAQ:STEX – Get Free Report) CIO Mitchell Young Williams sold 263,863 shares of the stock in a transaction on Friday, May 1st. The stock was sold at an average price of $0.79, for a total value of $208,451.77. Following the sale, the executive owned 3,037,648 shares of the company’s stock, valued at approximately $2,399,741.92. This represents a 7.99% decrease in their ownership of the stock. The sale was disclosed in a filing with the SEC, which is available through this link. The sale was made to cover tax withholding obligations related to the vesting of equity…