This shud be your worry...dont want to be on wrong side if one of them decides to dump cos of impatience and cant stand this nonsense no more!!
I understand your view.
However, there are over 600 million shares. The share has been too illiquid to dump. Besides this, the larger investor would have got in above R1 when the last bank role occurred.
Large shareholders would probably use their voting power first to reset the board, then legal route before selling and realising such a significant loss.
So I'd agree that it may not be a top strength but that depends on what decisions the institutional investors make.