UBS and the other two outfits still would have had 2 more weeks to exercise, so they could have bought them this morning at the mid $13 price and sold them right away. They also could have bought them and sold them to their clients as normal transactions evolve.
The only problem would be if they had a naked short (not covered short) position, they would have to use those shares to cover that position 1st before they could do anything else with the shares.