A much more accurate title would be "19 Amazon shareholders demand it stop selling facial recognition to governments." They even wrote a sternly worded letter!
Activist funds are able to shake things up with a lot less than 19 shareholders, so the count isn't important at all unless it's giant.
Privately delivered to Amazon by the ACLU. Until one of the signatories, who is also a major Amazon shareholder, goes public with their disgruntlement this should merit no further attention.
[1] http://money.cnn.com/2018/06/18/technology/amazon-facial-rec...
(It's a more-than-impulse-buy price of ~$1700 right now - but if I were the sort of person who bought single company shares to push my personal causes at shareholder meetings, I'd probably have bought in at a few hundred bucks 5 or more years back...)
[1]: http://www.ipjc.org/wp-content/uploads/2017/10/NWCRI-Annual-...