Four Blackbaud executives saw their pay at least double in the year ended December 31. Stock awards given by the Charleston, S.C.-based nonprofit software company boosted their compensation over 2014. CEO Michael Gianoni received $11.5 million for 2015,  an increase of 140 percent from $4.8 million the prior year. The overwhelming amount of Gianoni’s pay was $10.1 million in stock awards, up 284.4 percent from $2.6 million in 2014.