Teams whose primary function was to keep LNKD running as a public company, some in-house IT. Former was announced on the day of aquisition itself, latter happened slowly over few months. Company has been transparent and open about it. I don't think there were mass layoffs in other areas.
I wonder how long they’ll let LI have their own comp structure. We pay significantly more than Microsoft at the same level (similar to Facebook, Google, etc) so I’ve seen many Microsoft people switch over to LI and get higher comp.