From The Guardian -

"According to analysis of Federal Election Commission (FEC) filings by the Center for Responsive Politics, four of the top five employers of Sanders donors are tech companies. Google is number one, its employees having contributed more than $200,000. Microsoft, Apple and Amazon occupy the third, fourth and fifth spots respectively. Hillary Clinton, by contrast, has no tech companies in her top five, and only one in her top 20.

Sanders also appears to be receiving far more individual contributions from tech workers than Clinton. A software engineer and Sanders supporter named Bill Schaller used the FEC filings to produce a pair of pie charts that break both sets of contributors down by occupation. Technology and education are the leading fields among Sanders donors, while Clinton’s are legal and retirees.

Momentum behind Sanders in tech is growing. As the Wall Street Journal and BuzzFeed recently reported, Bernie has seen a significant surge in contributions from the tech industry since late 2015, and is now out-raising Clinton more than two to one among tech workers. These seem to be first-time contributors, since the amount of cash going to Clinton has remained steady while the amount going to Sanders continues to rise."