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IBOC · International Bancshares Corp

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$71.49 -0.21 (-0.29%) At close · Aug 21
Market Cap
$4.45B
Shares
62.19M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 299
Total Value: $3,352,748,215
Total Shares: 44,144,200

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 299 13F filers · Δ vs Mar 31, 2026
Top Holder
16.0%
Sep 2023 → Jun 2026 · range 15.4% – 16.8%
+0.5 pts
Top 5
44.4%
Sep 2023 → Jun 2026 · range 44.4% – 53.8%
−0.2 pts
Top 10
61.5%
Sep 2023 → Jun 2026 · range 61.5% – 68.9%
−0.7 pts
HHI
561
Sep 2023 → Jun 2026 · range 560 – 748
Broadly held+1

Quarterly Activity

vs Mar 31, 2026
New
39
Increased
124
Decreased
86
Sold Out
33
Unchanged
50
Holder count: +6
Institutional value: +16.3%
Shares held: +3.0%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 299
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 315709 CUSIP 459044103 13F (30d) 256 filings 252 filers Visit website Investor relations