IBC amends bylaws to require 3% ownership for derivative suits, adds exclusive forum and jury waiver

INTERNATIONAL BANCSHARES CORP

Shareholders must now beneficially own at least 3% of IBC's outstanding common stock to institute a derivative proceeding.
Exclusive forum for internal entity claims: Texas Business Court (Fourth Division), or SD Texas, or Webb County district court.
Shareholders, directors, and officers waive trial-by-jury rights for internal entity claims and certain other actions.
Amendments effective August 6, 2025; adopting any shares implies consent to these provisions.
Other updates: unspecified governance and operational refinements also included.

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