Latest Period
Q1 2026
Security Snapshot
INTERNATIONAL BANCSHARES CORP - Common Stock (IBOC) Institutional Ownership
CUSIP: 459044103
13F Institutional Holders and Ownership History from Q1 2014 to Q1 2026
Institutions Reporting
289
Shares (Excl. Options)
42,829,244
Price
$67.29
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- Security type / class
- Equity / Common Stock
- Symbol
- IBOC on Nasdaq
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 42,829,244
- Total 13F value
- $2,881,999,235
- Portfolio coverage rank
- 0%
- Share change
- -554,150
- Value change
- -$36,306,152
- Number of holders
- 289
- Shares outstanding
- 62,222,033
- SEC-reported price per share
- $73.26
- Insider filing price
- $73.26
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- IBOC - INTERNATIONAL BANCSHARES CORP - Common Stock is tracked under CUSIP 459044103.
- 289 institutions reported positions in Q1 2026.
- 3 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 266 to 289 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $2,886,728,641 to $2,881,999,235.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 289 institutions filings for Q1 2026.
Security key
459044103
Latest holder period
Q1 2026
13F holders
289
13D/G owners
3
CIK / CUSIP context first
Open Q1 2026 holders
IBOC full holder history
INTERNATIONAL BANCSHARES CORP SEC filings
INTERNATIONAL BANCSHARES CORP company facts
INTERNATIONAL BANCSHARES CORP insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 459044103:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
3
Security
IBOC
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| VANGUARD PORTFOLIO MANAGEMENT LLC | 5.5% | $230,699,324 | 3,428,434 | Vanguard Portfolio Management | 31 Mar 2026 | |||
| DIMENSIONAL FUND ADVISORS LP | 5.2% | $220,429,343 | 3,206,231 | Dimensional Fund Advisors LP | 30 Sep 2025 | |||
| AMERICAN CENTURY INVESTMENT MANAGEMENT INC | 5.2% | $218,738,918 | 3,198,405 | American Century Investment Management, Inc. | 31 Dec 2025 |
As of 31 Mar 2026, 289 institutional investors reported holding 42,829,244 shares of INTERNATIONAL BANCSHARES CORP - Common Stock (IBOC). This represents 69% of the company’s total 62,222,033 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
57%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 11% | 6,645,092 | -0.97% | 0.01% | $447,148,257 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 5.5% | 3,401,609 | 0% | 0.01% | $228,894,270 |
| AMERICAN CENTURY COMPANIES INC | 5.2% | 3,228,578 | +0.94% | 0.11% | $217,251,014 |
| DIMENSIONAL FUND ADVISORS LP | 5.1% | 3,186,820 | +0.3% | 0.04% | $214,441,903 |
| STATE STREET CORP | 4.2% | 2,624,894 | +6.6% | 0.01% | $176,629,117 |
| VANGUARD CAPITAL MANAGEMENT LLC | 4% | 2,474,514 | 0% | 0% | $166,510,047 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.4% | 1,490,897 | +3.9% | 0.01% | $100,338,003 |
| Azora Capital LP | 2.1% | 1,312,674 | -14% | 5.8% | $88,329,833 |
| T. Rowe Price Investment Management, Inc. | 1.9% | 1,162,482 | +6.5% | 0.05% | $78,224,000 |
| FIRST TRUST ADVISORS LP | 1.8% | 1,137,572 | -17% | 0.05% | $76,547,219 |
| Boston Trust Walden Corp | 1.7% | 1,087,661 | -8.7% | 0.6% | $73,188,722 |
| GOLDMAN SACHS GROUP INC | 1.5% | 923,919 | +57% | 0.01% | $62,170,492 |
| Tamar Securities, LLC | 1.2% | 756,940 | +2.5% | 5.5% | $50,934,512 |
| REINHART PARTNERS, LLC. | 1.2% | 745,696 | +0.86% | 1.4% | $50,178,978 |
| MILLENNIUM MANAGEMENT LLC | 1.1% | 712,435 | +29% | 0.04% | $47,939,751 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.1% | 704,033 | -69% | 0.01% | $47,374,381 |
| NORTHERN TRUST CORP | 1.1% | 666,974 | +3.2% | 0.01% | $44,880,680 |
| PRICE T ROWE ASSOCIATES INC /MD/ | 0.88% | 544,814 | +103% | 0% | $36,662,000 |
| AQR CAPITAL MANAGEMENT LLC | 0.8% | 495,866 | -1.1% | 0.02% | $33,366,852 |
| Polaris Capital Management, LLC | 0.74% | 463,004 | -3% | 2.5% | $31,155,539 |
| Bank of New York Mellon Corp | 0.72% | 448,252 | -0.81% | 0.01% | $30,162,883 |
| PANAGORA ASSET MANAGEMENT INC | 0.62% | 385,948 | -0.54% | 0.1% | $25,970,441 |
| Invesco Ltd. | 0.62% | 385,648 | +44% | 0% | $25,950,254 |
| ProShare Advisors LLC | 0.59% | 367,119 | -27% | 0.04% | $24,703,437 |
| VANGUARD FIDUCIARY TRUST CO | 0.57% | 355,996 | 0% | 0.01% | $23,954,971 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
49
Latest
Q1 2026
Rows shown
1-25 of 49
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 42,829,244 | $2,881,999,235 | -$36,306,152 | $67.29 | 289 |
| 2025 Q4 | 43,446,739 | $2,886,728,641 | +$78,615,810 | $66.44 | 266 |
| 2025 Q3 | 42,251,399 | $2,904,804,211 | -$27,616,139 | $68.75 | 251 |
| 2025 Q2 | 42,707,059 | $2,842,601,547 | +$73,618,401 | $66.56 | 254 |
| 2025 Q1 | 41,794,104 | $2,635,180,123 | -$8,829,215 | $63.06 | 249 |
| 2024 Q4 | 41,916,800 | $2,647,360,256 | +$48,320,140 | $63.16 | 239 |
| 2024 Q3 | 41,145,583 | $2,460,485,786 | -$64,338,717 | $59.79 | 232 |
| 2024 Q2 | 42,166,144 | $2,412,199,449 | -$83,200,776 | $57.21 | 207 |
| 2024 Q1 | 43,580,754 | $2,446,960,647 | +$151,589,810 | $56.14 | 196 |
| 2023 Q4 | 40,937,981 | $2,223,757,537 | +$22,434,163 | $54.32 | 197 |
| 2023 Q3 | 40,545,409 | $1,757,250,325 | -$11,009,765 | $43.34 | 182 |
| 2023 Q2 | 40,789,895 | $1,802,880,232 | -$15,613,611 | $44.20 | 187 |
| 2023 Q1 | 41,164,992 | $1,762,615,185 | -$8,959,950 | $42.82 | 184 |
| 2022 Q4 | 41,508,761 | $1,899,412,121 | +$4,292,782 | $45.76 | 192 |
| 2022 Q3 | 41,431,178 | $1,764,573,778 | -$36,655,213 | $42.50 | 173 |
| 2022 Q2 | 41,964,939 | $1,681,605,363 | -$6,013,992 | $40.08 | 174 |
| 2022 Q1 | 42,340,063 | $1,790,237,563 | +$89,573,779 | $42.21 | 195 |
| 2021 Q4 | 40,164,461 | $1,702,556,221 | -$21,845,901 | $42.39 | 176 |
| 2021 Q3 | 39,659,961 | $1,651,646,873 | -$18,981,552 | $41.64 | 185 |
| 2021 Q2 | 40,573,900 | $1,742,742,328 | +$33,056,856 | $42.94 | 181 |
| 2021 Q1 | 39,806,595 | $1,851,373,617 | +$26,608,454 | $46.42 | 177 |
| 2020 Q4 | 39,270,264 | $1,471,561,639 | +$36,637,683 | $37.44 | 164 |
| 2020 Q3 | 38,434,033 | $1,003,500,157 | -$21,908,203 | $26.06 | 168 |
| 2020 Q2 | 39,230,244 | $1,254,736,625 | +$4,389,133 | $32.02 | 167 |
| 2020 Q1 | 38,665,158 | $1,040,126,743 | -$52,374,190 | $26.88 | 159 |