English to Italian Law/Patents Finance (general) Partnership agreement

Nella sezione "Morte":

Upon the death of either partner, the surviving partner shall have the right either to purchase the interest of the decedent in the partnership or to terminate and liquidate the partnership business. If the surviving partner elects to purchase the decedent's interest, he shall serve notice in writing of such election, within three months after the death of the decedent, upon the executor or administrator of the decedent, or, if at the time of such election no legal representative has been appointed, upon any one of the known legal heirs of the decedent at the last-known address of such heir.

Come tradurreste quel "interest"? Di getto mi viene quota ma penso anche a partecipazioni o proprio interessi...

Grazie in anticipo per l'aiuto domenicale :)