I don't think that class action will amount to too much. The criteroen seems to be who lost more than $100k on the investment. Seeing as CD&R own 75% of the stock and a huge chunk of the remaining company is owned by 8 professional investors, finding people who lost 100k will be quite hard as I doubt if many people had investments of a sufficient size to lose that amount of money. Hence why law firms are advertising to get plaintiffs in on it....
I am frequently wrong though and am not a lawyer (mercifully) so some ambulance chaser is bound to make some cash somewhere.
I promise that this law suit will not be the end of CHC though, it's not of sufficient size.