I haven't seen any concrete evidence of collusion, only...

I haven't seen any concrete evidence of collusion, only allegations and innuendo. We could equally claim that someone here wants to roll the board and install their own, which of course would be likewise perfectly fatuous and deniable. 

The basic fact is that OCP has been supporting the share price in a depressed market. Through months of buying it has increased its holding by.... 1%. At this rate it will be the 50.1% owner in roughly ten to twenty years. That doesn't worry me so much, if the current situation were to prevail forever, which it won't, because at some point the weak hands will run out of paper, and the price will be bid up out of OCP's price target.

It's basic Wyckoff: the 'composite man' has set a price level and is testing the market for supply. This can't last forever. Even famous beloved SFR sagged for a year between updraughts (and was sold down on nearly every announcement on the way up).