DOSSIER · 13F Holders · Q1 2026Financial Services · State Commercial Banks
IBOC

INTERNATIONAL BANCSHARES COR

301 institutions still hold INTERNATIONAL BANCSHARES COR as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 459044103·State Commercial Banks·301 13F holders·last filed Mar 31, 2026
Market cap
13F value held
$2.3B
visible holders
Holders
301
filers reporting
Concentration
19.62%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q1 2026

301 institutions reported IBOC in Q1 2026. BlackRock, Inc. leads at 19.6% of the visible book.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
BlackRock, Inc.
CIK 0002012383
$447M6.6M0.01%Q1 2026
02
Vanguard Portfolio Management
CIK 0002100121· Index
$229M3.4M0.01%Q1 2026
03
AMERICAN CENTURY COMPANIES INC
CIK 0000748054
$217M3.2M0.11%Q1 2026
04
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$214M3.2M0.04%Q1 2026
05
STATE STREET CORP
CIK 0000093751
$177M2.6M0.01%Q1 2026
06
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$167M2.5M0.00%Q1 2026
07
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$100M1.5M0.01%Q1 2026
08
Azora Capital LP
CIK 0001700272
$88M1.3M5.81%Q1 2026
09
T. Rowe Price Investment Management, Inc.
CIK 0001897612
$78M1.2M0.05%Q1 2026
10
FIRST TRUST ADVISORS LP
CIK 0001125816· Index
$77M1.1M0.05%Q1 2026
11
Boston Trust Walden Corp
CIK 0001534866
$73M1.1M0.60%Q1 2026
12
GOLDMAN SACHS GROUP INC
CIK 0000886982
$62M924K0.01%Q1 2026
13
REINHART PARTNERS, LLC.
CIK 0001080298
$57M750K1.30%Q2 2026
14
Tamar Securities, LLC
CIK 0001703081
$51M757K5.45%Q1 2026
15
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
$48M712K0.02%Q1 2026
16
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
CIK 0000884546· Index
$47M704K0.01%Q1 2026
17
NORTHERN TRUST CORP
CIK 0000073124· Index
$45M667K0.01%Q1 2026
18
PRICE T ROWE ASSOCIATES INC /MD/
CIK 0000080255
$37M545K0.00%Q1 2026
19
AQR CAPITAL MANAGEMENT LLC
CIK 0001167557
$33M496K0.02%Q1 2026
20
Polaris Capital Management, LLC
CIK 0001316926
$31M463K2.55%Q1 2026
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Insiders at INTERNATIONAL BANCSHARES COR
Wawroski Judith ISanchez Antonio R JrNixon Dennis EMartinez Dalia FZuniga Diana G