International Bancshares Corporation (IBOC) Ownership
IBOC ownership summary
as of October 18, 2026- Institutions
- 73.0% of shares outstanding
- Insiders
- 13.08% of shares outstanding
- Shares outstanding
- 62.2M
- Float
- 56.2M shares available to trade
- Short interest
- 4.76% 2.3M shares short
- Days to cover
- 5.96 short interest up 7.5% vs prior month
- Institutions 73.02%
- Insiders 13.08%
- Other investors 13.90%
IBOC top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 11.33% | 7.0M | $474.6M | +403,102 (+6.1%) | June 30, 2026 |
| 2 | Vanguard Portfolio Management, LLC | 5.39% | 3.4M | $225.6M | −51,411 (−1.5%) | June 30, 2026 |
| 3 | Dimensional Fund Advisors, Inc. | 5.24% | 3.3M | $219.4M | +71,836 (+2.3%) | June 30, 2026 |
| 4 | American Century Companies Inc | 5.03% | 3.1M | $210.7M | −100,162 (−3.1%) | June 30, 2026 |
| 5 | State Street Corp | 4.52% | 2.8M | $189.3M | +185,882 (+7.1%) | June 30, 2026 |
| 6 | Vanguard Capital Management, LLC | 4.01% | 2.5M | $168.1M | +21,395 (+0.9%) | June 30, 2026 |
| 7 | Geode Capital Management, LLC | 2.53% | 1.6M | $106.0M | +82,481 (+5.5%) | June 30, 2026 |
| 8 | BTIM Corp | 2.10% | 1.3M | $88.0M | +218,944 (+20.1%) | June 30, 2026 |
| 9 | T. Rowe Price Investment Management,Inc. | 1.87% | 1.2M | $78.2M | −1,376 (−0.1%) | June 30, 2026 |
| 10 | The Goldman Sachs Group Inc | 1.67% | 1.0M | $69.7M | +111,826 (+12.1%) | June 30, 2026 |
| 11 | Azora Capital LP | 1.42% | 886K | $59.6M | −426,906 (−32.5%) | June 30, 2026 |
| 12 | T. Rowe Price Associates, Inc. | 1.35% | 840K | $56.6M | +295,036 (+54.2%) | June 30, 2026 |
| 13 | First Trust Advisors L.P. | 1.32% | 821K | $55.3M | −316,732 (−27.8%) | June 30, 2026 |
| 14 | Northern Trust Corp | 1.21% | 751K | $50.6M | +83,890 (+12.6%) | June 30, 2026 |
| 15 | Reinhart Mahoney Capital Management Inc | 1.17% | 730K | $49.2M | −19,832 (−2.6%) | September 30, 2026 |
| 16 | Tamar Securities, LLC | 1.16% | 721K | $48.6M | −35,729 (−4.7%) | June 30, 2026 |
| 17 | NORGES BANK | 1.13% | 700K | $47.2M | +14,074 (+2.1%) | June 30, 2026 |
| 18 | Charles Schwab Investment Management Inc | 1.12% | 695K | $46.8M | −9,417 (−1.3%) | June 30, 2026 |
| 19 | Millennium Management LLC | 1.05% | 651K | $43.8M | −61,660 (−8.7%) | June 30, 2026 |
| 20 | AQR Capital Management LLC | 0.94% | 588K | $39.6M | +91,744 (+18.5%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 11 holders added 1.6M shares and 9 cut 1.0M.
IBOC top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | iShares Core S&P Mid-Cap ETF | 3.10% | 1.9M | $129.6M | −684 (−0.0%) | September 30, 2026 |
| 2 | Vanguard MStar Total Stk Mkt Idx Invest | 2.87% | 1.8M | $120.2M | −2,909 (−0.2%) | August 31, 2026 |
| 3 | Avantis US Small Cap Value ETF | 2.80% | 1.7M | $117.4M | +1,944 (+0.1%) | September 30, 2026 |
| 4 | iShares Russell 2000 ETF | 2.39% | 1.5M | $100.1M | +20,767 (+1.4%) | September 30, 2026 |
| 5 | Vanguard Small Cap Index | 2.02% | 1.3M | $84.7M | −30,571 (−2.4%) | September 30, 2026 |
| 6 | Vanguard MStar Small Cap Value Index | 1.32% | 820K | $55.2M | +2,190 (+0.3%) | September 30, 2026 |
| 7 | Fidelity Small Cap Index | 0.97% | 606K | $40.8M | +4,480 (+0.7%) | July 31, 2026 |
| 8 | DFA US Targeted Value I | 0.91% | 567K | $38.2M | — | August 31, 2026 |
| 9 | American Century Small Cap Value Inv | 0.82% | 510K | $34.3M | −35,000 (−6.4%) | September 30, 2026 |
| 10 | T. Rowe Price Small-Cap Value | 0.79% | 490K | $33.0M | — | September 30, 2026 |
| 11 | State Street® SPDR® S&PRgnllBkgETF | 0.78% | 483K | $32.5M | +14,400 (+3.1%) | September 30, 2026 |
| 12 | iShares Russell 2000 Value ETF | 0.76% | 474K | $31.9M | +718 (+0.2%) | September 30, 2026 |
| 13 | DFA US Small Cap I | 0.70% | 435K | $29.3M | — | August 31, 2026 |
| 14 | Dimensional US Targeted Value ETF | 0.66% | 412K | $27.7M | +5 (+0.0%) | September 30, 2026 |
| 15 | State Street® SPDR® S&P MIDCAP 400® ETF | 0.64% | 400K | $26.9M | +4,444 (+1.1%) | September 30, 2026 |
| 16 | T. Rowe Price Integrated US Sm Gr Eq | 0.63% | 394K | $26.5M | — | September 30, 2026 |
| 17 | DFA US Small Cap Value I | 0.59% | 364K | $24.5M | — | August 31, 2026 |
| 18 | ProShares S&P MidCap 400 Dividend Arst | 0.57% | 357K | $24.0M | — | September 30, 2026 |
| 19 | First Trust SMID Cp Rising Div Achv ETF | 0.54% | 337K | $22.7M | — | September 30, 2026 |
| 20 | Vanguard Russell 2000 ETF | 0.52% | 323K | $21.7M | +3,600 (+1.1%) | September 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
IBOC insider transactions
latest 6| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2024-11-12 | Dennis E Nixon | Sell | $72.18 | 34,815 | $2.5M |
| 2024-05-21 | Antonio R Sanchez Jr | Sell | $59.75 | 30,112 | $1.8M |
| 2024-03-11 | Antonio R Sanchez Jr | Sell | $54.22 | 40,000 | $2.2M |
| 2023-12-07 | Antonio R Sanchez Jr | Sell | $49.06 | 25,000 | $1.2M |
| 2023-11-27 | Antonio R Sanchez Jr | Sell | $44.79 | 45,000 | $2.0M |
| 2023-11-15 | Antonio R Sanchez Jr | Sell | $47.77 | 30,000 | $1.4M |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
IBOC shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns IBOC
Institutional investors own 73.0% of International Bancshares's shares and insiders 13.08%. The largest holder is BlackRock Inc with 11.33% of the shares (7.0M), as of June 30, 2026. Among the top 20 institutions, 11 added shares and 9 reduced their stake in the latest filings. Short interest is 4.76% of the float, or 5.96 days of average trading volume. The share count fell 6.3% since 2014.
Related: IBOC analyst forecast, IBOC key metrics, IBOC dividend history. See the IBOC stock overview for the latest quote and news.
IBOC ownership FAQ
Who owns the most International Bancshares stock?
The largest shareholders of International Bancshares are BlackRock Inc (11.33%), Vanguard Portfolio Management, LLC (5.39%), Dimensional Fund Advisors, Inc. (5.24%), American Century Companies Inc (5.03%), State Street Corp (4.52%).
What percentage of International Bancshares is owned by institutions?
Institutions hold 73.0% of International Bancshares's shares outstanding; insiders hold 13.08%.
Which funds own International Bancshares?
The largest fund holders of International Bancshares are iShares Core S&P Mid-Cap ETF (3.10%), Vanguard MStar Total Stk Mkt Idx Invest (2.87%), Avantis US Small Cap Value ETF (2.80%), iShares Russell 2000 ETF (2.39%), Vanguard Small Cap Index (2.02%).
What is International Bancshares's short interest?
2.3M shares of International Bancshares were sold short, 4.76% of the float; at the average daily volume it would take 5.96 days to cover.
Are insiders buying or selling International Bancshares?
Of the latest 6 reported insider transactions in International Bancshares (since November 15, 2023), 0 were purchases and 6 were sales.
How many shares of International Bancshares are outstanding?
International Bancshares has 62.2M shares outstanding, of which 56.2M are in the public float.