Costco Wholesale Corporation
1 tracked fund (-43.7% QoQ) · 8 congressional trades (net selling)
How many independent disclosure channels show smart-money activity here — agreement between unrelated filers, not a buy rating
6-month daily closes · markers show insider cluster buys and congressional trades at their disclosed dates
Tap a marker for trade details
13F filings · 2026Q2
Tracked shares trend
2026Q1 → 2026Q2 · 26.5K sh
Top holders
3+ insiders buying within 7 days
No insider cluster buys detected for this ticker.
Track COST live with the whales
Real-time cluster alerts, 13F consensus, short interest, and dark pool flow on the WhaleTrack dashboard.
Data aggregated from public regulatory filings (SEC EDGAR, House and Senate STOCK Act disclosures) and may be delayed or contain errors — verify against the official source before relying on any figure. Not investment advice. See our Terms.
STOCK Act trades, last 180 days
Public view runs 48h behind — same-day filings, including new Form 144 planned sales, stream on the dashboard radar →
FINRA bi-weekly short interest and weekly off-exchange (ATS) aggregates
As of settlement Aug 14, 2026
Off-exchange flow · week of Aug 3, 2026
Top venues: INCR INTELLIGENT CROSS LLC (323.8K), UBSA UBS ATS (259.5K), SGMT SIGMA X2 (183.5K)
FINRA publishes short interest twice a month and off-exchange aggregates ~2–4 weeks behind — positioning context, not a live tape. Full universe on the order flow tab →