RE:CINVENCinven got their shares as part payment in the Amco deal- sorry I ballparked it in my last post. Looks like $82.45 US per share. There were/are restrictions for selling them.
"The total purchase price will consist of cash consideration of approximately £800 million (approximately US$1.2 billion), 8.49 million common shares of Concordia (approximately US$0.7 billion), and the assumption of approximately US$1.4 billion AMCo net debt upon closing, as well as a maximum performance-based earn-out of £144 million payable in cash in the fourth quarter of 2016 (approximately US$220 million). Following the closing of the transaction, Concordia will own a 100% stake in AMCo, and Cinven will hold an expected 19.9% ownership in Concordia on a non-diluted basis and before giving effect to the anticipated equity offering (referenced below)."