Granted, the original article and the comment which cites it mixes PAC + employee. For the purposes of identifying political bias in an organization though, the employee donations are quite a bit more illuminating. PAC donations are more strategic investments in incumbents, thus tend so be roughly 50-50 in the current political landscape: "A company’s PAC donations have less to do with supporting a specific party than with accessing those in power. Corporate PACs donate the vast majority — 90 percent in the last midterm — of their money to incumbent candidates, who are much more likely to be elected than challengers. Tech companies are no different."
For completeness, here is Googles PAC + employee donation breakdown: 87% D, 13% R. On par with the partisanism of Koch Industries, which even Charles Koch decries as a mistake. I don't have the data to split KI PAC vs. KI employee donations.
It's like comparing the weight of a pound of bricks to a pound of feathers.