13F Insight
DOSSIER · 13F Holders · Q2 2026

CLOUDFLARE INC

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

CUSIP 18915M907·11 13F holders·last filed Jun 30, 2026
Market cap
—
13F value held
$531M
visible holders
Holders
11
filers reporting
Concentration
41.99%
IMC-Chicago, LLC #1
top holder share
AI Holders Summary · Q2 2026

11 institutions reported CLOUDFLARE INC in Q2 2026. IMC-Chicago, LLC leads at 42.0% 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
$223M909K0.05%Q2 202602
Optiver Holding B.V.
CIK 0001859606· Market maker
$101M410K0.03%Q2 202603
SG Americas Securities, LLC
CIK 0001313360
$77M1.0M0.08%Q1 202604
GROUP ONE TRADING LLC
CIK 0000932540
$45M182K0.06%Q2 202605
SIMPLEX TRADING, LLC
CIK 0001488542
$42M173K0.02%Q2 202606
HIGHBRIDGE CAPITAL MANAGEMENT LLC
CIK 0000919185
$23M93K0.55%Q2 202607
RIPOSTE CAPITAL LLC
CIK 0001672355
$18M75K4.08%Q2 202608
Capital Markets Trading UK LLP
CIK 0001719165
$2M9K0.02%Q1 202609
Sunstone Asset Management, L.P.
CIK 0002111996
$898K14K0.97%Q2 202610
OSAIC HOLDINGS, INC.
CIK 0001677044
$13K10.00%Q2 202611
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00—Q2 2025