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COST // Costco Wholesale Corporation

OWN <GO> NASDAQ CIK 0000909832 ↗
Consumer Staples • Membership Warehouse Clubs & Kirkland Private Label • SIC 5331
$1,012.28 ▲ +16.20 (+1.63%)
MKT CAP: $440.74B • VOL: 3.38M
DISCLOSED BUY FLOW
$737.9M
DISCLOSED SELL FLOW
$152.9M
13F HEDGE FUND FILINGS
4 DISCLOSURES
CONGRESSIONAL STOCK ACT
2 FILINGS
COST // SEC FORM 4 INSIDERS, 13F WHALES & POLITICIAN LEDGER (OWN <GO>) WHALE DIRECTORY <13F>
FILING DATE FILER / INSTITUTION CATEGORY ACTION SHARES EXEC PRICE TOTAL VALUE DOSSIER
2026-10-14 Wilcox William Richard
SEC Form 4 Open-Market Officer / Director
INSIDER SELL 1.1K $958.21 $1.1M TRACK <GO>
2026-07-19 Renaissance Technologies
13F-HR Medallion Quantitative Manager // CIK 0001037389
HEDGE_FUND BUY 195.0K $951.67 $185.6M TRACK <GO>
2026-06-25 Denman Kenneth D
SEC Form 4 Open-Market Officer / Director
INSIDER SELL 885 $957.45 $847.3K TRACK <GO>
2026-04-18 Pershing Square (Bill Ackman)
13F-HR Concentrated Activist Manager // CIK 0001336528
HEDGE_FUND BUY 240.0K $983.86 $236.1M TRACK <GO>
2026-04-17 Berkshire Hathaway (Warren Buffett)
13F-HR Value Conglomerate & Float Manager // CIK 0001067983
HEDGE_FUND BUY 320.0K $983.86 $314.8M TRACK <GO>
2026-04-01 Frates Caton
SEC Form 4 Open-Market Officer / Director
INSIDER SELL 700 $993.00 $695.1K TRACK <GO>
2026-03-18 Sen. Tommy Tuberville
U.S. Senate Armed Services Committee (AL) // STOCK Act PTR
POLITICIAN BUY 420 $998.10 $419.2K TRACK <GO>
2026-03-11 Adamo Claudine
SEC Form 4 Open-Market Officer / Director
INSIDER SELL 730 $1,003.02 $732.2K TRACK <GO>
2026-01-23 Jones Teresa A.
SEC Form 4 Open-Market Officer / Director
INSIDER SELL 850 $986.26 $838.3K TRACK <GO>
2026-01-20 Citadel Advisors (Ken Griffin)
13F-HR Multi-Strategy Institutional Manager // CIK 0001423053
HEDGE_FUND SELL 165.0K $854.50 $141.0M TRACK <GO>
2026-01-20 Decker Susan L
SEC Form 4 Open-Market Officer / Director
INSIDER SELL 458 $955.00 $437.4K TRACK <GO>
2026-01-15 Klauer James C
SEC Form 4 Open-Market Officer / Director
INSIDER SELL 1.5K $939.00 $1.4M TRACK <GO>
2026-01-12 Miller Russell D
SEC Form 4 Open-Market Officer / Director
INSIDER SELL 1.5K $916.32 $1.4M TRACK <GO>
2025-12-31 Polit Javier
SEC Form 4 Open-Market Officer / Director
INSIDER SELL 2.6K $866.28 $2.3M TRACK <GO>
2025-12-06 Rep. Nancy Pelosi
U.S. House Representative (CA-11) // STOCK Act PTR
POLITICIAN BUY 1.0K $922.98 $923.0K TRACK <GO>
2025-11-12 Wilcox William Richard
SEC Form 4 Open-Market Officer / Director
INSIDER SELL 2.4K $930.13 $2.2M TRACK <GO>