DOSSIER · 13F Holders · Q2 2026

BLACKROCK INC

7 institutions still hold BLACKROCK INC as of Q2 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 09290D951·7 13F holders·last filed Jun 30, 2026
Market cap
13F value held
$244M
visible holders
Holders
7
filers reporting
Concentration
45.56%
Optiver Holding B.V. #1
top holder share
AI Holders Summary · Q2 2026

7 institutions reported BLACKROCK INC in Q2 2026. Optiver Holding B.V. leads at 45.6% of the visible book.

Top holders

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

#HolderValueShares% port.Quarter
01
Optiver Holding B.V.
CIK 0001859606· Market maker
$111M116K0.03%Q2 2026
02
IMC-Chicago, LLC
CIK 0001452861· Market maker
$105M110K0.03%Q2 2026
03
SIMPLEX TRADING, LLC
CIK 0001488542
$14M15K0.01%Q2 2026
04
JPMORGAN CHASE & CO
CIK 0000019617
$9M9K0.00%Q2 2026
05
GROUP ONE TRADING LLC
CIK 0000932540
$4M4K0.01%Q2 2026
06
SG Americas Securities, LLC
CIK 0001313360
$213K5K0.00%Q1 2026
07
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00Q2 2025