gettyimages-542439042-b7a35f628e11dc4ab2e8fdc467f7c4daa75db903

gettyimages-542439042-b7a35f628e11dc4ab2e8fdc467f7c4daa75db903

NEW YORK, NY – JUNE 23: Twilio Inc. founder and CEO Jeff Lawson (C, in glasses) reacts after ringing the opening bell to celebrate Twilio’s initial public offering, at the New York Stock Exchange, June 23, 2016 in New York City. Financial markets are bracing for the outcome of Thursday’s historic ‘Brexit’ referendum, where Britons will head to the polls to decide whether the United Kingdom should remain in the European Union. (Photo by Drew Angerer/Getty Images)