Costco (COST) insider trading in the last 6 months

Form 4 filings, newest first

Quality Score today 13

4 insiders sold $4.6M. No buys.

SellWilliam Richard Wilcox$1.1MExecutive Vice Presidentat $958.21 on Oct 13, filed Oct 14

SellWilliam Richard WilcoxExecutive Vice President$1.1Mat $958.21 on Oct 13, filed Oct 14

SellClaudine Adamo$2MExecutive Vice Presidentat $915.93 on Sep 29, filed Sep 30

SellClaudine AdamoExecutive Vice President$2Mat $915.93 on Sep 29, filed Sep 30

SellCaton Frates$733KSr. Executive Vice Presidentat $915.93 on Sep 29, filed Sep 30

SellCaton FratesSr. Executive Vice President$733Kat $915.93 on Sep 29, filed Sep 30

From SEC Form 4s, the newest filed Oct 14, 2026 · Insiders have 2 business days to file a trade

1 more filing on COST in the last 6 months, for Pro members. See them free →

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Who files at Costco Wholesale

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Questions about COST's insider trades

As of Nov 2, 2026: Costco Wholesale (COST) has 4 insider filings on record in the last 6 months, the newest filed Oct 14, 2026. Its Quality Score is 13 (Above Average). Scores as of 5:02 PM ET, 15 minutes behind.

Are COST insiders buying or selling?

4 insiders sold $4.6M across 4 filings in the last 6 months. No open-⁠market buys on record. The newest filing: William Richard Wilcox, Executive Vice President, sold $1.1M on Oct 13, 2026.

Who are COST's biggest insider sellers?

By the dollars of their sales in the last 6 months: Claudine Adamo (Executive Vice President), 1 sale; William Richard Wilcox (Executive Vice President), 1 sale; Kenneth D. Denman (Director), 1 sale. 4 insiders sold in all.

When did a COST insider last buy?

No COST insider bought shares on the open market in the last 6 months, as filed on Form 4. The newest filing is a sale by William Richard Wilcox on Oct 13, 2026.

Costco Wholesale's page has its Quality Score, its chart, and its earnings. More in Consumer Staples and Retail-Variety Stores.