International Bancshares Corporation
Ownership
Ownership Structure
Who owns International Bancshares Corporation (IBOC)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 90.4% of the shares are freely tradable; institutional investors hold 72.0%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 11.33 | 7,048,194 | +6.1 | 06/30/2026 |
| Vanguard Portfolio Management, LLC | 5.39 | 3,350,198 | -1.5 | 06/30/2026 |
| Dimensional Fund Advisors, Inc. | 5.24 | 3,258,656 | +2.3 | 06/30/2026 |
| American Century Companies Inc | 5.03 | 3,128,416 | -3.1 | 06/30/2026 |
| State Street Corp | 4.52 | 2,810,776 | +7.1 | 06/30/2026 |
| Vanguard Capital Management, LLC | 4.01 | 2,495,909 | +0.9 | 06/30/2026 |
| Geode Capital Management, LLC | 2.53 | 1,573,378 | +5.5 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Core S&P Mid-Cap ETF | 3.10 | 1,925,293 | +0.0 | 09/30/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 2.88 | 1,791,166 | +0.4 | 09/30/2026 |
| Avantis US Small Cap Value ETF | 2.80 | 1,743,117 | +0.1 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Sanchez Antonio R Jr | Director | 1,207,245 | 80,764,691 $ | Oct 21, 2026 | indirect |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Oct 21, 2026 | Sanchez Antonio R Jr | Director | Other | 25,000 | 0.00 | – |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: October 30, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.