13F Insight
DOSSIER · 13F Holders · Q1 2026Financial Services · Security Brokers, Dealers & Flotation CompaniesCheap mega-capRe-rated
IBKR

INTERACTIVE BROKERS GROUP IN

1,030 institutions still hold INTERACTIVE BROKERS GROUP IN as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 45841N107·Security Brokers, Dealers & Flotation Companies·1,030 13F holders·last filed Mar 31, 2026
Market cap
—
▼ 3.1%
vs prior quarter
13F value held
$14.5B
61.0% inst. owned
of float
Holders
1,030
+108 QoQ
filers reporting
Activity
+16 / −50
+823 added · −834 reduced
this quarter
Concentration
14.53%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q1 2026

1,030 institutions reported IBKR in Q1 2026. BlackRock, Inc. leads at 14.5% of the visible book. +108 net new institutions vs prior quarter — accumulation reading.

Top holders

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

#HolderValueShares% port.Quarter
01
BlackRock, Inc.
CIK 0002012383
$2.1B31.4M0.04%Q1 202602
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119
$1.9B28.2M0.05%Q1 202603
STATE STREET CORP
CIK 0000093751
$1.3B19.1M0.04%Q1 202604
Vanguard Portfolio Management
CIK 0002100121
$1.0B15.0M0.05%Q1 202605
FMR LLC
CIK 0000315066
$838M12.5M0.04%Q1 202606
CANTILLON CAPITAL MANAGEMENT LLC
CIK 0001279936
$754M11.2M5.01%Q1 202607
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$700M10.4M0.04%Q1 202608
KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC
CIK 0001021223
$672M10.0M1.97%Q1 202609
WELLINGTON MANAGEMENT GROUP LLP
CIK 0000902219
$656M9.8M0.12%Q1 202610
Invesco Ltd.
CIK 0000914208
$647M9.6M0.10%Q1 202611
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
$563M8.4M0.45%Q1 202612
JPMORGAN CHASE & CO
CIK 0000019617
$428M6.7M0.03%Q1 202613
Egerton Capital (UK) LLP
CIK 0001581811
$421M6.3M4.67%Q1 202614
BANK OF AMERICA CORP /DE/
CIK 0000070858
$418M6.2M0.03%Q1 202615
Orbis Allan Gray Ltd
CIK 0001663865
$410M6.1M1.73%Q1 202616
London & Capital Asset Management Ltd
CIK 0001767559
$397M5.9M4.32%Q1 202617
AMERICAN CENTURY COMPANIES INC
CIK 0000748054
$385M5.7M0.20%Q1 202618
MORGAN STANLEY
CIK 0000895421
$320M4.8M0.02%Q1 202619
1832 Asset Management L.P.
CIK 0000944388
$299M4.5M0.27%Q1 202620
TWO SIGMA ADVISERS, LP
CIK 0001478735
$296M4.6M0.57%Q4 2025
Page 1 of 52
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