International Bancshares (IBOC): which funds own it

Who owns International Bancshares?

Holders reporting more than 5% of the shares to the SEC (Schedules 13D/13G): Vanguard Portfolio Management, 5.5% (13G filed Apr 29, 2026), American Century Investment Management, 5.2% (13G filed Feb 13, 2026) and Dimensional Fund Advisors, 5.2% (13G/A filed Oct 9, 2025). Sanchez Antonio R Jr is listed on Form 4 filings as an owner of more than 10%. As of Jun 30, 2026, the largest holders reported on Form 13F were BlackRock (11.3% of the shares), Vanguard Portfolio Management (5.4%) and Dimensional Fund Advisors (5.2%).

Sources:13G by Vanguard Portfolio Management (Apr 29, 2026) ↗13G by American Century Investment Management (Feb 13, 2026) ↗13G/A by Dimensional Fund Advisors (Oct 9, 2025) ↗All of the company's proxy statements on EDGAR ↗

13F percentages divide the shares each institution reports by the shares outstanding on the cover of the company's latest report before the quarter end (May 4, 2026). Entities of the same group file separately and are not added up. We hold 13D and 13G filings made since Dec 23, 2024: a holder above 5% that has not filed since then does not appear here.

• BlackRock7.0 MIndex manager · 11.33% of the company+403 K
• Vanguard Portfolio Management3.4 MIndex manager · 5.39% of the company−51 K
• Dimensional Fund Advisors3.3 MIndex manager · 5.24% of the company+72 K
• American Century Companies3.1 MInvestment firm · 5.03% of the company−100 K
• State Street2.8 MIndex manager · 4.52% of the company+186 K
• Vanguard Capital Management2.5 MIndex manager · 4.01% of the company+21 K
• Geode Capital Management1.6 MIndex manager · 2.53% of the company+82 K
• Boston Trust Walden1.3 MType not verified · 2.10% of the company+219 K
• T. Rowe Price Investment Management1.2 MInvestment firm · 1.87% of the company−1,376
• Goldman Sachs Group1.0 MBank or trading desk · 1.67% of the company+112 K

The 10 13F filers with the most shares as of Jun 30, 2026, whatever their type (index firms usually come first). “Change”: shares added or cut versus the previous quarter, split-adjusted; “no data” = there is no comparable portfolio for the previous quarter (no filing, or a filing with its holdings under confidential treatment). “% of the company” only where shares outstanding are up to date. Entities of the same group file separately and some 13F filings include other managers: there may be double counting. With a free account: the top 25, the largest buyers and the largest sellers.

Held by institutions (13F)

Institutions (13F): 71.2% of the shares · top 10: 43.7% · in index firms: 52.2% of the institutional total

Shares reported by the 302 13F filers as of Jun 30, 2026 (not counting 1 position with implausible figures), divided by the shares outstanding on the cover of the company's latest report (May 4, 2026). It is not all institutional ownership: only managers above $100M file a 13F, and it excludes short positions. Entities of the same group file separately and some 13F filings include other managers: there may be double counting. We only publish it where the figure is credible: not for ADRs, companies with more than one share class or stale shares-outstanding data.

Shares outstanding: buybacks and dilution

From the statements the company filed with the SEC (10-K). The change compares average diluted shares of each fiscal year, on today's basis: negative = it bought back more than it issued; positive = dilution. “No data” = the company does not report that item under a tag we can read; it does not mean zero.

Earnings quality and debt

From the figures the company filed with the SEC. Cash flow over net income near or above 1 means earnings are collected in cash; far below, that part is accounting. Coverage says how many times operating income pays the latest fiscal year's interest. Maturities come from the debt note of the latest annual report, counted from its closing date. “No data” never means zero.

Above 5% over time (13D/13G)

Each holder with its filings in order. History since December 2024.

Flagged material events (8-K)

• Oct 6, 2026Seriousfiling ↗

  Notice of delisting or failure to meet a listing rule (Item 3.01)

  «to Transfer Primary Listing to Texas Stock Exchange»

Alert items the company itself flagged in its 8-K filings with the SEC, most serious first. It is the form's label, with no interpretation from us: Item 5.02 covers routine appointments as well as a chief executive's departure; open the filing. The quoted headline is the original press release's.