Among Bernie Sanders' top donor there are a lot of big tech companies (most of them based on Silicon Valley, California), namely: Alphabet (Google), Microsoft, Apple, Amazon, IBM, Facebook. This surprises me because Sanders tax policies would damage big companies' revenue.
Those donations are pretty modest (~ $10K) -- five orders of magnitude lower than Hilary Clinton's top donations (~ $1B). Is the small size of the donations the only reason why Sanders' top donators are big tech companies?
Source: https://www.opensecrets.org/pres16/contrib.php?cycle=2016&id=N00000528&type=f