On June 2, a sports-betting marketing company called SharpLink Gaming SBET -2.45%decrease; red down pointing triangle said it had closed a $425 million private placement led by blockchain company Consensys Software, to become the largest public corporate holder of ether. The announcement, however, sent shares of Nasdaq-listed SharpLink, which is based in Minneapolis, down 28%. The next day, a Canadian renewable-energy company called SolarBank fared better. Its stock closed up more than 1% after announcing its bitcoin treasury strategy.