John Wobensmith recalls going to the Manhattan offices of Seth Glickenhaus several years ago as the legendary investor was doing business-as-usual at well over the age of 90.

“He still went to his office in midtown every day,” said Wobensmith, president of dry bulk owner Genco Shipping & Trading. “One day I met him over there and there was another guy in the office who had to be in his 60s.