Last updated Aug 21, 2026
COSTCO WHOLESALE CORP /NEW (COST) is a publicly traded company. This page tracks every superinvestor 13F holding, congressional stock trade, and Form 4 insider transaction in COST. Across our datasets, 9 superinvestors hold COST and 19 members of Congress have traded it.
Notable holders include Tom Gayner, Ray Dalio, and Thomas Russo. Active congressional traders include Ro Khanna, Scott Franklin, and Greg Landsman.
Key takeaways