13F Insight
DOSSIER · 13F Holders · Q2 2026

ZSCALER INC

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

CUSIP 98980G902·11 13F holders·last filed Jun 30, 2026
Market cap
—
13F value held
$240M
visible holders
Holders
11
filers reporting
Concentration
56.80%
IMC-Chicago, LLC #1
top holder share
AI Holders Summary · Q2 2026

11 institutions reported ZSCALER INC in Q2 2026. IMC-Chicago, LLC leads at 56.8% of the visible book.

Top holders

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

#HolderValueShares% port.Quarter
01
IMC-Chicago, LLC
CIK 0001452861· Market maker
$136M965K0.03%Q2 202602
Optiver Holding B.V.
CIK 0001859606· Market maker
$37M265K0.01%Q2 202603
GROUP ONE TRADING LLC
CIK 0000932540
$25M178K0.04%Q2 202604
SIMPLEX TRADING, LLC
CIK 0001488542
$18M131K0.01%Q2 202605
JPMORGAN CHASE & CO
CIK 0000019617
$9M66K0.00%Q2 202606
SG Americas Securities, LLC
CIK 0001313360
$6M833K0.01%Q1 202607
Ancora Advisors LLC
CIK 0001446114
$3M8750.06%Q2 202608
HRT FINANCIAL LP
CIK 0001475597
$3M13K0.01%Q4 202509
Maven Securities LTD
CIK 0001633046
$2M12K0.03%Q2 202610
OSAIC HOLDINGS, INC.
CIK 0001677044
$2K10.00%Q2 202611
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00—Q2 2025