US has many internet and software companies, you have FB, Google, Microsoft, Apple , I can't even name an EU company, I know that SUSE Linux is in Germany so it makes sense that on HN front page you will see this big companies and not some small EU company.
As an example in Romania, Microsoft was caught doing illegal things, they corrupted government people to buy tons of licenses, we should not wait for an EU company to do the same before investigating this MS issue. The fact that some other companies also bribed some other people should not affect the MS case.
I am not sure if the MS case even reached MSW top page, but if it were some small software company outside US it would not appear on HN at all, only on local press, so HN from page has a bias for big US companies