13F Insight
DOSSIER · 13F Holders · Q2 2026

COSTCO WHSL CORP NEW

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

CUSIP 22160K955·11 13F holders·last filed Jun 30, 2026
Market cap
—
13F value held
$1.5B
visible holders
Holders
11
filers reporting
Concentration
70.96%
IMC-Chicago, LLC #1
top holder share
AI Holders Summary · Q2 2026

11 institutions reported COSTCO WHSL CORP NEW in Q2 2026. IMC-Chicago, LLC leads at 71.0% 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
$1.1B1.1M0.25%Q2 202602
Optiver Holding B.V.
CIK 0001859606· Market maker
$216M231K0.06%Q2 202603
NATIONAL BANK OF CANADA /FI/
CIK 0000926171
$73M7800.05%Q2 202604
JPMORGAN CHASE & CO
CIK 0000019617
$62M66K0.00%Q2 202605
SIMPLEX TRADING, LLC
CIK 0001488542
$47M50K0.03%Q2 202606
GROUP ONE TRADING LLC
CIK 0000932540
$25M27K0.04%Q2 202607
HRT FINANCIAL LP
CIK 0001475597
$6M7K0.02%Q4 202508
BlackDiamond Wealth Management, LLC
CIK 0001903059
$2M2K0.61%Q2 202609
AlphaCore Capital LLC
CIK 0001713662
$67K150.00%Q2 202610
OSAIC HOLDINGS, INC.
CIK 0001677044
$49K30.00%Q2 202611
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00—Q2 2025