International Bancshares Corp
IBOC- Exchange
- Nasdaq
- Industry
- State Commercial Banks
- SEC CIK
- 0000315709
No open-market purchases or sales by International Bancshares Corp insiders were filed in the last 90 days; 301 institutions reported holding it in 13F filings for Q2 2026, worth $3.36B in total; no superinvestor holds it.
Holders of 5% or more of IBOC
Holders whose latest Schedule 13D or 13G filing reports 5% or more of International Bancshares Corp, largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Dimensional Fund Advisors LP | 13G/A | 5.20%3.21M shares | – | Oct 9, 20251 filing | Oct 9, 2025 | SEC |
| American Century Investment Management Inc | 13G | 5.20%3.20M shares | New | Feb 13, 20261 filing | Feb 13, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
3 Schedule 13D and 13G filings on International Bancshares Corp, newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Mar 27, 20269:54 AM ET | Vanguard Group Inc | 13G/A | 0.00%0 shares | –Below 5% | Mar 13, 2026 | SEC |
| Feb 13, 202610:20 AM ET | American Century Investment Management Incand 2 others | 13G | 5.20%3.20M shares | New | Dec 31, 2025 | SEC |
| Oct 9, 20251:48 PM ET | Dimensional Fund Advisors LP | 13G/A | 5.20%3.21M shares | – | Sep 30, 2025 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell International Bancshares Corp shares.
No Form 144 notices for International Bancshares Corp are on file.