COSTCO WHOLESALE CORP (COST) Institutional Ownership and Insiders Activity

COSTCO WHOLESALE CORP (COST) is widely held by institutional investors, with 4179 firms reporting positions valued at approximately $304.87B based on SEC Form 13F filings for the quarter ended June 30, 2026.

Blackrock, Inc. is the largest disclosed holder, reporting approximately $32.00B in COST holdings in its latest filing.

Recent insider activity includes 16 tracked Form 4 transactions over the last three months, reflecting ongoing executive and director trading activity.