Speaking last week at the SEC’s and Rock Center’s Silicon Valley Initiative at Stanford Law School, SEC Chair Mary Jo White cautioned Silicon Valley’s start-up companies regarding their potential lack of internal controls. In particular, she warned that unicorns—nonpublic start-up companies valued north of one billion dollars—may warrant special scrutiny into whether their corporate governance and investor disclosures are keeping pace with their growing valuations. Ms. White repeatedly warned that the prestige of obtaining “unicorn” status may drive companies to inflate their valuations.