If the money is worth chasing then a good forensic accountant will yield results: the discovery process should take in the negotiations re the pharma contract, with perhaps correspondence directly with the pharma which should get A's attention.
My experience with forensic accountants is that usually it concentrates the mind of the opposing party.
The accountant, or others, owning the company is a fairly standard, but quite unsophisticated, avoidance method.
There will be a side letter somewhere setting out the ultimate ownership because if the accountant snuffs it, the ownership has to have a mechanism to revert.