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HomeStocksIBOCInstitutional Holders

IBOC logoInternational Bancshares Corporation (IBOC) Institutional Ownership

Q2 2026 13F Data|Updated 2026-11-07

✨

Institutional ownership increased this quarter (+2.30 pp), though top 10 holders maintain a highly concentrated 64.4% of institutional value.

Institutional Ownership
Can exceed 100% due to securities lending, short interest, and reporting timing differences.
71.2%$3.2B total value · ▲ +2.30 pp vs prior quarter
Smart Money Score
Based on ownership concentration, fund quality, buying/selling activity, ownership indicators, and institutional trend.
68 / 100Bullish
Institutions & Flow302 holders+10 net flow (+34 / -24)

AI Insights & Key Takeaways

  • Positive Institutional Flow (+10)
  • Millennium Management Llc and Two Sigma Investments, Lp maintain significant positions
  • Top 10 holders control 64.4% of institutional value
  • No Insider Signal

Top Institutional Holders of IBOC

Ranked by reported Q2 2026 13F market value

Top 10 Holders
64.4%
Top 25 Holders
84.1%

Share of total reported institutional value in IBOC held by the largest 10 / 25 filers.

#InstitutionShares HeldMarket ValueQoQ ChangeOwnership %% of Fund
1BlackRock, Inc.7.0M$535.3M+6.1%11.335%0.01%
2VANGUARD PORTFOLIO MANAGEMENT LLC3.4M$254.4M-1.5%5.388%0.01%
3DIMENSIONAL FUND ADVISORS LP3.3M$247.5M+2.3%5.241%

Quarterly Institutional Activity

Filings activity in IBOC during Q2 2026, grouped by how each filer changed its position.

OverviewNew Buyers34Added To222Trimmed39Exited24
  • BlackRock, Inc.$535.3M
  • VANGUARD PORTFOLIO MANAGEMENT LLC$254.4M
  • DIMENSIONAL FUND ADVISORS LP

IBOC Institutional Ownership by Quarter

8 quarters of 13F filings · Δ columns show change vs prior quarter

QuarterInst. HoldersΔ HoldersOwnership %Δ OwnershipTotal 13F ValueΔ Value
Q2 2026302+3.1%71.20%+2.30 pp$3.17B+16%
Q1 2026293+12%68.90%0.14 pp$2.72B0.9%
Q4 2025262+5.6%69.04%+1.05 pp$2.75B0.8%
Q3 20252481.2%67.99%0.62 pp$2.77B+2.0%
Q2 2025251+1.2%68.61%+1.47 pp$2.72B+7.1%
Q1 2025248

IBOC — Frequently Asked Questions

Quick answers to the most common questions about buying IBOC stock.

What percentage of IBOC is owned by institutions?

Based on Q2 2026 13F filings, institutional ownership of International Bancshares Corporation stands at 71.2%, held across 302 reporting institutions.

Who is the largest institutional holder of IBOC?

BlackRock, Inc. is the largest reported institutional holder of IBOC, with approximately 7,048,194 shares worth $0.54B as of Q2 2026.

Is IBOC a hedge fund favorite?

Yes — 2 widely-followed marquee investors appear among the top 25 institutional holders of IBOC, including MILLENNIUM MANAGEMENT LLC, TWO SIGMA INVESTMENTS, LP.

What is IBOC's Smart Money Score?

Our composite Smart Money Score for IBOC is 68 out of 100 (Bullish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.

How many institutions bought IBOC this quarter?
0.04%
4AMERICAN CENTURY COMPANIES INC3.1M$237.6M-3.1%5.031%0.11%
5STATE STREET CORP2.8M$213.5M+7.1%4.520%0.00%
6VANGUARD CAPITAL MANAGEMENT LLC2.5M$189.6M+0.9%4.014%0.00%
7GEODE CAPITAL MANAGEMENT, LLC1.6M$119.5M+5.5%2.530%0.01%
8Boston Trust Walden Corp1.3M$99.2M+20.1%2.101%0.76%
9GOLDMAN SACHS GROUP INC1.0M$78.7M+12.1%1.666%0.01%
10Azora Capital LP886K$67.3M-32.5%1.425%2.83%
11FIRST TRUST ADVISORS LP821K$62.3M-27.8%1.320%0.04%
12NORTHERN TRUST CORP751K$57.0M+12.6%1.208%0.01%
13REINHART PARTNERS, LLC.750K$56.9M+0.5%1.206%1.30%
14Tamar Securities, LLC721K$54.8M-4.7%1.160%5.12%
15NORGES BANK700K$53.2M—1.126%0.01%
16CHARLES SCHWAB INVESTMENT MANAGEMENT INC695K$52.8M-1.3%1.117%0.01%
17MILLENNIUM MANAGEMENT LLC651K$49.4M-8.6%1.047%0.02%
18AQR CAPITAL MANAGEMENT LLC588K$44.6M+18.5%0.945%0.02%
19Bank of New York Mellon Corp437K$33.2M-2.6%0.702%0.01%
20PANAGORA ASSET MANAGEMENT INC423K$32.1M+9.7%0.681%0.10%
21ProShare Advisors LLC378K$28.7M+2.9%0.607%0.04%
22VANGUARD FIDUCIARY TRUST CO366K$27.8M+2.8%0.588%0.01%
23Polaris Capital Management, LLC321K$24.4M-30.6%0.516%2.30%
24BANK OF AMERICA CORP /DE/311K$23.6M+59.9%0.500%0.00%
25TWO SIGMA INVESTMENTS, LP307K$23.3M+82.0%0.493%0.02%

denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in IBOC — a direct measure of their conviction.

$247.5M
  • AMERICAN CENTURY COMPANIES INC$237.6M
  • STATE STREET CORP$213.5M
  • VANGUARD CAPITAL MANAGEMENT LLC$189.6M
  • GEODE CAPITAL MANAGEMENT, LLC$119.5M
  • Boston Trust Walden Corp$99.2M
  • GOLDMAN SACHS GROUP INC$78.7M
  • NORTHERN TRUST CORP$57.0M
  • REINHART PARTNERS, LLC.$56.9M
  • Tamar Securities, LLC$54.8M
  • +3.3%
    67.14%
    0.36 pp
    $2.54B
    0.5%
    Q4 2024240+3.4%67.50%+2.40 pp$2.55B+9.6%
    Q3 2024232—65.10%—$2.33B—

    Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.

    34 institutions opened new positions in IBOC during Q2 2026, while 24 fully exited. 222 added to existing positions and 39 trimmed.

    How is institutional ownership of IBOC changing?

    IBOC institutional ownership rose by 2.30 percentage points quarter-over-quarter, with a net change of +9 holders.

    How concentrated is IBOC ownership among the top holders?

    The top 10 institutions account for 64.4% of all reported 13F value in IBOC, and the top 25 account for 84.1%.

    Where does this IBOC institutional ownership data come from?

    All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.

    IBOCInternational Bancshares Corporation
    $67.57$4.2B
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