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CIK 0000909832 · Large accelerated filer

COSTCO WHOLESALE CORP /NEW

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Ticker
COST
Exchange
Nasdaq
Industry
Retail-Variety Stores
FY end
Aug 30
Incorporated
WA
Entity type
operating
EIN
911223280
Phone
4253138100
Business address
999 LAKE DRIVE, ISSAQUAH, WA, 98027-
Former names
COSTCO COMPANIES INC, PRICE/COSTCO INC
Open-market buys, last 90 days
$0
in 0 filings
Open-market sales, last 90 days
$4,777,958
in 4 filings

Net −$4,777,958. Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.

Pace of trading Bought Sold

Who's trading

90 days

  1. Adamo Claudine −$2.0M Executive Vice President sold 24% of stake
  2. Wilcox William Richard −$1.1M Executive Vice President sold 26% of stake
  3. Jones Teresa A. −$976K Executive Vice President sold 14% of stake
  4. Frates Caton −$733K Sr. Executive Vice President sold 9% of stake

Reading 100 more Form 4s from the SEC; this list fills in as they're read.

Date Insider Transaction Shares Price Value Owned after
2026-09-10 Wilcox William Richard Executive Vice President Shares withheld for taxes −1,934.61 $902.38 $1.7M 4,194.39
2026-09-10 Rubanenko Yoram Executive Vice President Grant or award +4,129 12,376.12
2026-09-10 Rubanenko Yoram Executive Vice President Shares withheld for taxes −1,695.95 $902.38 $1.5M 10,680.17
2026-09-10 Riel Pierre Executive Vice President Grant or award +4,552 15,807.89
2026-09-10 Riel Pierre Executive Vice President Shares withheld for taxes −1,561.66 $902.38 $1.4M 14,246.23
2026-09-10 Klauer James C Executive Vice President Grant or award +4,129 48,965.99
2026-09-10 Klauer James C Executive Vice President Shares withheld for taxes −936.12 $902.38 $845K 48,029.88
2026-09-10 Jones Teresa A. Executive Vice President Grant or award +4,129 8,056.8
2026-09-10 Jones Teresa A. Executive Vice President Shares withheld for taxes −1,458.54 $902.38 $1.3M 6,598.27
2026-09-10 Frates Caton Executive Vice President Grant or award +4,552 10,367
2026-09-10 Frates Caton Executive Vice President Shares withheld for taxes −1,654.36 $902.38 $1.5M 8,712.64
2026-09-10 Adamo Claudine Executive Vice President Grant or award +4,129 10,250.2
2026-09-10 Adamo Claudine Executive Vice President Shares withheld for taxes −916.69 $902.38 $827K 9,333.51
2026-07-10 RAIKES JEFFREY S Director Gift −5,249 6,043.94
2026-06-23 DENMAN KENNETH D Director Sale −885 $957.45 $847K 4,778.94
2026-04-01 Frates Caton Executive Vice President Sale −700 $993.00 $695K 5,815
2026-03-12 George Sarah Catherine Executive Vice President Other disposition −642.13 $991.21 $636K 0
2026-03-11 MILLERCHIP GARY Executive Vice President Shares withheld for taxes −1,154.02 $992.23 $1.1M 15,465.3
2026-03-09 Adamo Claudine Executive Vice President Sale −730 $1,003.02 $732K 6,121.2
2026-01-27 RAIKES JEFFREY S Director Gift −5,115 11,292.94

Page 4 of 90 · 1,795 trades