Elon Musk, the billionaire chairman of SolarCity Corp. and the company’s biggest shareholder, increased his stake after the top U.S. installer of rooftop power plants fell to a 22-month low.
Musk bought 123,510 shares at a price of $40.4855 each, according to a regulatory filing Monday after the close of regular U.S. trading, boosting his holdings by about 0.6 percent.
