323 institutions reported holding $3.42B of INTERNATIONAL BANCSHARES COR (IBOC) in SEC 13F filings for 2026-06-30. Largest institutional holders: BlackRock, Inc. ($535.3M), VANGUARD GROUP INC ($479.1M), DIMENSIONAL FUND ADVISORS LP ($247.5M), AMERICAN CENTURY COMPANIES INC ($237.6M), STATE STREET CORP ($213.5M). Source: SEC Form 13F.
Source: SEC Form 13F filings · as of 2026-06-30