INTERNATIONAL BANCSHARES CORP (IBOC) — insider trading
Financials · NASDAQ
INTERNATIONAL BANCSHARES CORP (IBOC) has 30 reported SEC Form 4 insider transactions in our data, including 12 open-market sales among the most recent 30 (latest 2026-05-21).
Recent Form 4 transactions
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-05-21 | Norton Larry A | Director | Open-market sale | 10,000 | $72.00 | $720.0K | Form 4 |
| 2026-02-06 | WAWROSKI JUDITH I | Officer (TREASURER/PAO) | Option exercise / conversion (derivative) | 300 | $0.00 | $0 | Form 4 |
| 2026-02-06 | WAWROSKI JUDITH I | Officer (TREASURER/PAO) | Option exercise / conversion (derivative) | 875 | $0.00 | $0 | Form 4 |
| 2026-02-06 | WAWROSKI JUDITH I | Officer (TREASURER/PAO) | Option exercise / conversion | 300 | $16.84 | $5.1K | Form 4 |
| 2026-02-06 | WAWROSKI JUDITH I | Officer (TREASURER/PAO) | Option exercise / conversion | 875 | $38.30 | $33.5K | Form 4 |
| 2025-09-05 | WAWROSKI JUDITH I | Officer (TREASURER/PAO) | Option exercise / conversion (derivative) | 600 | $71.58 | $42.9K | Form 4 |
| 2025-09-05 | WAWROSKI JUDITH I | Officer (TREASURER/PAO) | Disposition to the issuer | 600 | $71.58 | $42.9K | Form 4 |
| 2025-09-05 | WAWROSKI JUDITH I | Officer (TREASURER/PAO) | Option exercise / conversion | 600 | $39.33 | $23.6K | Form 4 |
| 2025-08-15 | SANCHEZ ANTONIO R JR | Director, 10% owner | Open-market sale | 40,000 | $68.12 | $2.72M | Form 4 |
| 2025-08-14 | SANCHEZ ANTONIO R JR | Director, 10% owner | Open-market sale | 80,000 | $69.83 | $5.59M | Form 4 |
| 2025-06-05 | WAWROSKI JUDITH I | Officer (TREASURER/PAO) | Option exercise / conversion (derivative) | 300 | $0.00 | $0 | Form 4 |
| 2025-06-05 | WAWROSKI JUDITH I | Officer (TREASURER/PAO) | Option exercise / conversion (derivative) | 700 | $0.00 | $0 | Form 4 |
| 2025-06-05 | WAWROSKI JUDITH I | Officer (TREASURER/PAO) | Option exercise / conversion | 300 | $16.84 | $5.1K | Form 4 |
| 2025-06-05 | WAWROSKI JUDITH I | Officer (TREASURER/PAO) | Option exercise / conversion | 700 | $38.30 | $26.8K | Form 4 |
| 2024-12-17 | SANCHEZ ANTONIO R JR | Director, 10% owner | Bona fide gift | 9,000 | $0.00 | $0 | Form 4 |
| 2024-12-17 | SANCHEZ ANTONIO R JR | Director, 10% owner | Bona fide gift | 9,000 | $0.00 | $0 | Form 4 |
| 2024-11-13 | NIXON DENNIS E | Director, Officer (CEO) | Open-market sale | 65,185 | $71.47 | $4.66M | Form 4 |
| 2024-11-12 | NIXON DENNIS E | Director, Officer (CEO) | Open-market sale | 34,815 | $72.18 | $2.51M | Form 4 |
| 2024-08-13 | WAWROSKI JUDITH I | Officer (TREASURER/PAO) | Option exercise / conversion (derivative) | 500 | $0.00 | $0 | Form 4 |
| 2024-08-13 | WAWROSKI JUDITH I | Officer (TREASURER/PAO) | Option exercise / conversion | 500 | $38.30 | $19.1K | Form 4 |
| 2024-05-22 | SANCHEZ ANTONIO R JR | Director, 10% owner | Open-market sale | 49,888 | $58.39 | $2.91M | Form 4 |
| 2024-05-21 | SANCHEZ ANTONIO R JR | Director, 10% owner | Open-market sale | 30,112 | $59.75 | $1.80M | Form 4 |
| 2024-03-11 | SANCHEZ ANTONIO R JR | Director, 10% owner | Open-market sale | 40,000 | $54.22 | $2.17M | Form 4 |
| 2024-01-23 | MARTINEZ DALIA F | Officer (VICE PRESIDENT) | Option exercise / conversion (derivative) | 5,000 | $0.00 | $0 | Form 4 |
| 2024-01-23 | MARTINEZ DALIA F | Officer (VICE PRESIDENT) | Shares withheld for taxes / exercise cost | 1,969 | $54.39 | $107.1K | Form 4 |
| 2024-01-23 | MARTINEZ DALIA F | Officer (VICE PRESIDENT) | Option exercise / conversion | 5,000 | $21.42 | $107.1K | Form 4 |
| 2023-12-08 | SANCHEZ ANTONIO R JR | Director, 10% owner | Open-market sale | 25,000 | $48.86 | $1.22M | Form 4 |
| 2023-12-08 | SANCHEZ ANTONIO R JR | Director, 10% owner | Open-market sale | 50,000 | $48.86 | $2.44M | Form 4 |
| 2023-12-07 | SANCHEZ ANTONIO R JR | Director, 10% owner | Open-market sale | 25,000 | $49.06 | $1.23M | Form 4 |
| 2023-12-07 | SANCHEZ ANTONIO R JR | Director, 10% owner | Open-market sale | 50,000 | $49.06 | $2.45M | Form 4 |
Ask the chat about IBOC's insider activity →
Transaction types are the SEC Form 4 codes: open-market purchases (P) and sales (S) are the only rows that reflect open-market conviction. Awards/vesting (A), option exercises (M/X/C), shares withheld for taxes (F) and gifts (G) are compensation or mechanical, not buying or selling on the open market. Sales may be planned and non-discretionary (e.g. a Rule 10b5-1 plan); open-market buying is not a recommendation to buy. Informational only — not financial advice.
Source: SEC EDGAR Form 3/4/5. See the full company profile: INTERNATIONAL BANCSHARES CORP (IBOC).
Last updated 2026-05-21 (most recent filing date).
Informational only — NOT financial advice. Insider filings are sourced from SEC EDGAR and shown with their reported dates.