Who owns International Bancshares Corporation?
Institutional ownership of IBOC from SEC Form 13F filings across 202 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
202
13F holders
$2.29B
value, 2026 filers
50.2%
of shares outstanding (31.2M sh)
24
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30· % of fund = share of the manager's own book · % of co. = share of IBOC's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 7.0M | $535.3M | 0.0% | 11.3% | +6.1% |
| 2 | VANGUARD PORTFOLIO MANAGEMENT LLC | 3.4M | $254.4M | 0.0% | 5.4% | -1.5% |
| 3 | AMERICAN CENTURY COMPANIES INC | 3.1M | $237.6M | 0.1% | 5% | -3.1% |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 2.5M | $189.6M | 0.0% | 4% | -49.6% |
| 5 | GEODE CAPITAL MANAGEMENT, LLC | 1.6M | $119.5M | 0.0% | 2.5% | +5.5% |
| 6 | GOLDMAN SACHS GROUP INC | 1.0M | $78.7M | 0.0% | 1.7% | +12.1% |
| 7 | PRICE T ROWE ASSOCIATES INC /MD/ | 839,850 | $63,788 | 0.0% | 1.4% | +54.2% |
| 8 | FIRST TRUST ADVISORS LP | 820,840 | $62.3M | 0.0% | 1.3% | -27.8% |
| 9 | NORTHERN TRUST CORP | 750,864 | $57.0M | 0.0% | 1.2% | +12.6% |
| 10 | Tamar Securities, LLC | 721,211 | $54.8M | 5.1% | 1.2% | -4.7% |
| 11 | NORGES BANKNEW | 700,374 | $53.2M | 0.0% | 1.1% | new |
| 12 | Sixth Street Partners Management Company, L.P.NEW | 694,616 | $52.8M | 9.1% | 1.1% | new |
| 13 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 694,616 | $52.8M | 0.0% | 1.1% | -1.3% |
| 14 | MILLENNIUM MANAGEMENT LLC | 650,775 | $49.4M | 0.0% | 1% | -8.7% |
| 15 | Bank of New York Mellon Corp | 436,744 | $33.2M | 0.0% | 0.7% | -2.6% |
| 16 | VANGUARD FIDUCIARY TRUST CO | 365,865 | $27.8M | 0.0% | 0.6% | +2.8% |
| 17 | BANK OF AMERICA CORP /DE/ | 311,061 | $23.6M | 0.0% | 0.5% | +59.9% |
| 18 | TWO SIGMA INVESTMENTS, LP | 306,839 | $23.3M | 0.0% | 0.5% | +82.0% |
| 19 | MORGAN STANLEY | 305,785 | $23.2M | 0.0% | 0.5% | +3.2% |
| 20 | Invesco Ltd. | 298,085 | $22.6M | 0.0% | 0.5% | -22.7% |
| 21 | UBS Group AG | 237,074 | $18.0M | 0.0% | 0.4% | +37.3% |
| 22 | MACKENZIE FINANCIAL CORP | 233,830 | $17.8M | 0.0% | 0.4% | +325.0% |
| 23 | ALLIANCEBERNSTEIN L.P. | 221,655 | $14.9M | 0.0% | 0.4% | +0.8% |
| 24 | Nuveen, LLC | 219,339 | $16.7M | 0.0% | 0.4% | +74.3% |
| 25 | Walleye Capital LLCNEW | 200,778 | $15.2M | 0.1% | 0.3% | new |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.