My former company was acquired by IBM several years ago and became part of what is now known as Watson Health. This past May, about 50% of my former colleagues were laid off en masse, even though Watson Health is considered to be the IBM's "moonshot" (I personally bailed before all that happened as I had already worked for IBM in the past and knew what they were all about).
Further, two other acquisitions that were made as part of Watson Health saw 70-80% of their respective workforces laid off right around the same time. Hopefully Red Hat fares better, but I'd keep my résumé updated and at the ready.
This post was originally a reply to another thread ( @VTljECw-ync ). Think that we should all be prepared for this scenario.