English to Spanish Bus/Financial Business/Commerce (general)

Estoy traduciendo un pagaré y al comienzo habla de la constitución de un grupo financiero:

""A" originated from the reunification of "B", "C" and "D". Pursuant to the Law on the Regional Scope of Credit Institutions, these had been **disincorporated** in 1952 **from** "A" which was founded in 1870. The merger and the name were entered in the Commercial Register of the District Court xxx on May 2nd, 1957."

donde A, B, C y D son bancos. He encontrado que "to disincorporate = liquidar o disolver una sociedad mercantil", pero no aplica aquí ese término.