Terrible click-bait title. They are asking the competition watchdog (ARM is a UK company) to asses the takeover. This is no different from the FTC in the US reviewing a takeover to make sure it's not anticompetitive.
I'm confused as to how this got posted. I posted exactly the same link yesterday. If I try to post a link and someone has already posted it - even a few days prior - the link doesn't get posted and I get redirected to comments on the existing link.