DOSSIER · 13F Holders · Q2 2026

CLOUDFLARE INC

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

CUSIP 18915M957·10 13F holders·last filed Jun 30, 2026
Market cap
13F value held
$568M
visible holders
Holders
10
filers reporting
Concentration
33.78%
Optiver Holding B.V. #1
top holder share
AI Holders Summary · Q2 2026

10 institutions reported CLOUDFLARE INC in Q2 2026. Optiver Holding B.V. leads at 33.8% 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
$192M782K0.05%Q2 2026
02
IMC-Chicago, LLC
CIK 0001452861· Market maker
$183M745K0.04%Q2 2026
03
SG Americas Securities, LLC
CIK 0001313360
$92M1.0M0.10%Q1 2026
04
GROUP ONE TRADING LLC
CIK 0000932540
$40M161K0.06%Q2 2026
05
SIMPLEX TRADING, LLC
CIK 0001488542
$35M143K0.02%Q2 2026
06
HIGHBRIDGE CAPITAL MANAGEMENT LLC
CIK 0000919185
$12M48K0.29%Q2 2026
07
JPMORGAN CHASE & CO
CIK 0000019617
$9M35K0.00%Q2 2026
08
HRT FINANCIAL LP
CIK 0001475597
$4M20K0.01%Q4 2025
09
Capital Markets Trading UK LLP
CIK 0001719165
$2M10K0.03%Q1 2026
10
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00Q2 2025