NEW YORK, Sept 26 (Reuters) - JPMorgan Chase reorganized the leadership in its investment bank, promoting a new head in North America to succeed Fernando Rivas, who plans to retire, according to a memo seen by Reuters.

Rivas, who previously ran the financial institutions group, was one of JPMorgan's lead negotiators in its purchase of failed First Republic Bank in May. He will be replaced by Jay Horine.

The bank also appointed several global heads for industry groups reporting to Jim Casey and Vis Raghavan, its co-heads of global investment banking, effective immediately. (Reporting by Nupur Anand in New York; Editing by Lananh Nguyen and David Gregorio)