Complex sentence: After a falling out amongst the brothers, Sterling not only cancelled such plans but withdrew his share of the family fortune from the collective trust establishing his own foundation and sold off (and donated some) all his property holdings in Cooperstown.
Split into simpler sentences: After a falling out amongst the brothers, Sterling not only cancelled such plans, but also withdrew his share of the family fortune from the collective trust. He established his own foundation and sold off (and donated some) all his property holdings in Cooperstown.