International Bancshares Corporation
International Bancshares Corporation (IBOC) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · IBOC · as of Sep 30, 2025
Ownership Breakdown
253
Institutional Holders
▼ 2 vs Q2
$2.91B
Total Inst. Value
▲ $64.46M vs Q2
62.18M
Shares Outstanding
freeFloat 90.32%
42.29M
13F Shares Held
▼ 420,648 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
IBOC largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
BLACKROCK, INC. state commercial banks | 6.72M | 10.81% | 10.81% | $461.69B | Nov 12, 2025 | ▼ 41.6K |
VANGUARD GROUP INC state commercial banks | 6.30M | 10.14% | 10.14% | $433.33B | Nov 7, 2025 | ▼ 39.2K |
DIMENSIONAL FUND ADVISORS LP state commercial banks | 3.21M | 5.16% | 5.16% | $220.43B | Nov 12, 2025 | ▼ 95.8K |
AMERICAN CENTURY COMPANIES INC state commercial banks | 3.09M | 4.97% | 4.97% | $212.45B | Nov 12, 2025 | ▲ 204.5K |
STATE STREET CORP state commercial banks | 2.48M | 3.98% | 3.98% | $170.25B | Nov 14, 2025 | ▼ 88.9K |
CHARLES SCHWAB INVESTMENT MANAGEMENT INC state commercial banks | 2.23M | 3.59% | 3.59% | $153.44B | Nov 10, 2025 | ▲ 39.6K |
GEODE CAPITAL MANAGEMENT, LLC state commercial banks | 1.43M | 2.29% | 2.29% | $98.05B | Nov 12, 2025 | ▲ 11.7K |
FIRST TRUST ADVISORS LP state commercial banks | 1.27M | 2.04% | 2.04% | $87.35B | Nov 12, 2025 | ▲ 18.6K |
BOSTON TRUST WALDEN CORP state commercial banks | 1.25M | 2.01% | 2.01% | $85.90B | Oct 17, 2025 | ▼ 155.7K |
AZORA CAPITAL LP state commercial banks | 1.13M | 1.82% | 1.82% | $77.57B | Nov 14, 2025 | ▲ 38.2K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
18
Increased
+1.20M shares1
New Positions
first time holders29
Decreased
−953.0K shares0
Sold Out
fully exitedNet shares change (top 50)
+242.3K
+1.20M / −953.0K
Net new holders
-10
1 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
IBOC insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
0
Buy transactions
1
Sell transactions
0.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Norton Larry A director | May 21, 2026 | Sale | 10,000 | $72.00 | $720.0K | 111.9K | Form 4 ↗ |
WAWROSKI JUDITH I TREASURER/PAO | Sep 5, 2025 | D-Return | 600 | $71.58 | $42.9K | 11.2K | Form 4 ↗ |
SANCHEZ ANTONIO R JR
| Aug 14, 2025 | Sale | 80,000 | $69.83 | $5.59M | 487.4K | Form 4 ↗ |
SANCHEZ ANTONIO R JR
| Aug 15, 2025 | Sale | 40,000 | $68.12 | $2.72M | 447.4K | Form 4 ↗ |
SANCHEZ ANTONIO R JR
| Dec 17, 2024 | Gift | 9,000 | — | — | 1.81M | Form 4 ↗ |
SANCHEZ ANTONIO R JR
| Dec 17, 2024 | Gift | 9,000 | — | — | 9.0K | Form 4 ↗ |
NIXON DENNIS E CEO | Nov 12, 2024 | Sale | 34,815 | $72.18 | $2.51M | 965.2K | Form 4 ↗ |
NIXON DENNIS E CEO | Nov 13, 2024 | Sale | 65,185 | $71.47 | $4.66M | 900.0K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
International Bancshares Corporation (IBOC) is primarily owned by institutional investors, who hold approximately 68.0% of total shares outstanding. Company insiders own approximately 9.68%, while retail and public investors account for the remaining 22.31%.
The largest institutional shareholder of International Bancshares Corporation is BLACKROCK, INC., holding approximately 6.72 million shares — equal to 10.81% of outstanding shares — as of September 30, 2025.
A total of 253 institutional investors currently hold IBOC stock, with a combined institutional value of approximately $2.91 billion as of the most recent 13F filing period.
Frequently asked questions
IBOC ownershipInternational Bancshares Corporation (IBOC) is primarily owned by institutional investors, who hold approximately 68.0% of shares. The largest shareholder is BLACKROCK, INC. with a 10.81% stake. Company insiders hold 9.68%. Data sourced from SEC Form 13F as of September 30, 2025.