By accident (or serendipity?), I fell across a report (from 2016 - so getting on a bit) called:
Concordia International: An In-Depth Look Into AMCo's Drug Price Gouging
Unfortunately, this is a private report and only a tiny fragment can be viewed. But enough to be of interest. Links to that fragment and what I first found, a graph of prices of their liquid levothyroxine.
The summary is that MP would be worth absolutely nothing to Concordia (now Advanz) if the prices returned to sensible levels.