International Bancshares Corporation (IBOC) ownership: Top institutional holder: BlackRock, Inc. ($447.15M). Insider activity: Net Seller (0 buys, 5 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| BlackRock, Inc. | 6645092.00 | $447.15M | 2026-03-31 |
| VANGUARD GROUP INC | 6219187.00 | $413.20M | 2025-12-31 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 3401609.00 | $228.89M | 2026-03-31 |
| AMERICAN CENTURY COMPANIES INC | 3228578.00 | $217.25M | 2026-03-31 |
| DIMENSIONAL FUND ADVISORS LP | 3186820.00 | $214.44M | 2026-03-31 |
| STATE STREET CORP | 2624894.00 | $176.63M | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 2474514.00 | $166.51M | 2026-03-31 |
| BlackRock Fund Advisors | 3498827.00 | $142.75M | 2016-12-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-05-21 | |
| Sell | null | 2026-02-06 | |
| Sell | null | 2026-02-06 | |
| Sell | null | 2026-02-06 | |
| Sell | null | 2026-02-06 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.