The Securities and Exchange Commission on Monday charged Michael B. Rothenberg, whose firm Rothenberg Ventures LLC managed San Francisco-based technology venture capital funds, with overcharging investors to fund personal projects, including sending millions of dollars to his own virtual reality production company. The SEC alleges Rothenberg marketed his firm of nearly 200 investors and more than $64 million in assets under management as uniquely positioned to identify millennial entrepreneurs and invest in "frontier technology" companies.