shares of blackbaud inc blkb shot up 141 toward a 13month high in premarket trading after its largest shareholder clearlake capital group lp disclosed a bid to buy all the outstanding blackbaud shares for 71 each a 228 premium to friday’s closing price of 5783 the pershare bid would value the provider of software for the philanthropic community at about 378 billion clearlake also disclosed that it owned 975 million blackbaud shares or 183 of the shares outstanding clearlake plans to hold talks with blackbaud regarding terms of the proposed buyout back in october blackbaud had adopted a shareholder rights plan or “poison pill” to reduce the likelihood that any entity acquires a morethan 20 stake in the company blackbaud’s stock has lost 18 year to date through friday while the sp 500 spx has gained 34