COSTNasdaq · Retail-Variety Stores

COSTCO WHOLESALE CORP /NEW

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Insider buys, 6 months

Congress trades, 6 months

Signals, 6 months

Six months

After each filing

Oct 15 Sale Wilcox William Richard Insider

1 week

+4.1%S&P −1.0%

1 month

Result in15 trading days

3 months

Result in57 trading days

6 months

Result in120 trading days

Oct 14 Sale Rep. Richard W. Allen House

1 week

+4.1%S&P −1.0%

1 month

Result in15 trading days

3 months

Result in57 trading days

6 months

Result in120 trading days

Oct 1 Sale Adamo Claudine Insider

1 week

+3.6%S&P +1.3%

1 month

Result in5 trading days

3 months

Result in47 trading days

6 months

Result in110 trading days

Oct 1 Sale Frates Caton Insider

1 week

+3.6%S&P +1.3%

1 month

Result in5 trading days

3 months

Result in47 trading days

6 months

Result in110 trading days

Aug 14 Sale Rep. Richard Dean McCormick House

1 week

+1.9%S&P −1.2%

1 month

−6.3%S&P −2.4%

3 months

Result in15 trading days

6 months

Result in78 trading days

Show all 40

Jul 21 Buy Sen. Alan Armstrong Senate

1 week

+5.2%S&P −2.4%

1 month

+0.8%S&P +2.0%

3 months

+7.4%S&P +3.2%

6 months

Result in60 trading days

Jul 17 Buy Rep. Dan Newhouse House

1 week

+1.8%S&P −0.4%

1 month

+2.9%S&P +3.4%

3 months

+5.9%S&P +3.1%

6 months

Result in58 trading days

Jun 26 Sale DENMAN KENNETH D Insider

1 week

−0.2%S&P +3.1%

1 month

+1.6%S&P +1.6%

3 months

−3.0%S&P +6.1%

6 months

Result in43 trading days

Apr 2 Sale Frates Caton Insider

1 week

−1.6%S&P +3.6%

1 month

−0.1%S&P +9.5%

3 months

−6.2%S&P +14.8%

6 months

−9.0%S&P +17.9%

Mar 12 Sale Adamo Claudine Insider

1 week

−2.8%S&P −0.9%

1 month

−2.2%S&P +3.3%

3 months

−2.6%S&P +11.1%

6 months

−9.5%S&P +15.4%

Feb 13 Buy Rep. Gilbert Cisneros House

1 week

−1.3%S&P +0.7%

1 month

−3.2%S&P −3.1%

3 months

+6.5%S&P +8.5%

6 months

−4.7%S&P +13.0%

Jan 24 Sale Jones Teresa A. Insider

1 week

−0.8%S&P +0.4%

1 month

+1.9%S&P +0.1%

3 months

+2.2%S&P +3.5%

6 months

−0.7%S&P +7.5%

Jan 21 Sale DECKER SUSAN L Insider

1 week

−2.2%S&P +1.5%

1 month

+0.4%S&P +0.6%

3 months

+2.3%S&P +4.1%

6 months

−5.5%S&P +8.3%

Jan 16 Sale Klauer James C Insider

1 week

+1.5%S&P +0.2%

1 month

+3.5%S&P −0.8%

3 months

+3.7%S&P +2.8%

6 months

−3.3%S&P +8.8%

Jan 13 Sale Miller Russell D Insider

1 week

+4.3%S&P −1.2%

1 month

+6.2%S&P −1.8%

3 months

+4.7%S&P +1.2%

6 months

+0.7%S&P +8.8%

Jan 12 Sale Rep. Gilbert Cisneros House

1 week

+4.3%S&P −1.2%

1 month

+6.2%S&P −1.8%

3 months

+4.7%S&P +1.2%

6 months

+0.7%S&P +8.8%

Jan 1 Sale POLIT JAVIER Insider

1 week

+8.2%S&P +1.6%

1 month

+14.6%S&P +0.9%

3 months

+19.4%S&P −3.3%

6 months

+11.2%S&P +10.0%

Dec 9, 2025 Buy Rep. Richard Dean McCormick House

1 week

−1.3%S&P −2.4%

1 month

+7.9%S&P +1.4%

3 months

+15.5%S&P −3.4%

6 months

+12.7%S&P +8.5%

Nov 18, 2025 Buy Rep. Gilbert Cisneros House

1 week

+2.0%S&P +2.6%

1 month

−3.9%S&P +3.0%

3 months

+10.9%S&P +3.3%

6 months

+15.8%S&P +13.2%

Nov 15, 2025 Buy Sen. John Boozman Senate

1 week

−2.9%S&P +0.5%

1 month

−5.5%S&P +0.9%

3 months

+8.4%S&P +3.1%

6 months

+18.0%S&P +12.0%

Nov 13, 2025 Sale Wilcox William Richard Insider

1 week

−3.4%S&P −2.9%

1 month

−7.0%S&P +1.3%

3 months

+9.6%S&P +1.9%

6 months

+16.7%S&P +10.5%

Nov 4, 2025 Sale Sen. Shelley M Capito Senate

1 week

−2.2%S&P +0.9%

1 month

−4.3%S&P +1.2%

3 months

+7.2%S&P +2.2%

6 months

+8.2%S&P +9.5%

Oct 25, 2025 Sale Adamo Claudine Insider

1 week

−0.1%S&P −0.3%

1 month

−3.7%S&P −1.5%

3 months

+3.5%S&P +1.8%

6 months

+7.7%S&P +4.4%

Oct 25, 2025 Sale Barbre Tiffany Marie Insider

1 week

−0.1%S&P −0.3%

1 month

−3.7%S&P −1.5%

3 months

+3.5%S&P +1.8%

6 months

+7.7%S&P +4.4%

Oct 10, 2025 Sale Rep. Valerie Hoyle House

1 week

+0.1%S&P +1.2%

1 month

−2.2%S&P +3.0%

3 months

+0.8%S&P +4.9%

6 months

+5.6%S&P +6.2%

Oct 2, 2025 Sale Miller Russell D Insider

1 week

+2.8%S&P +0.3%

1 month

−0.4%S&P +1.9%

3 months

−6.7%S&P +2.4%

6 months

+11.4%S&P −1.0%

Oct 1, 2025 Sale Frates Caton Insider

1 week

−0.3%S&P +0.7%

1 month

+0.3%S&P +1.7%

3 months

−5.9%S&P +2.3%

6 months

+11.0%S&P −1.3%

Sep 17, 2025 Buy Rep. Richard Dean McCormick House

1 week

−1.0%S&P −0.4%

1 month

−1.7%S&P +0.6%

3 months

−9.3%S&P +1.7%

6 months

+2.4%S&P −1.2%

Sep 12, 2025 Buy Rep. Valerie Hoyle House

1 week

−1.8%S&P +1.2%

1 month

−1.4%S&P +0.5%

3 months

−7.7%S&P +3.4%

6 months

+4.0%S&P +2.1%

Aug 13, 2025 Buy Rep. Lisa McClain House

1 week

−0.6%S&P −1.5%

1 month

−1.6%S&P +2.5%

3 months

−6.2%S&P +6.3%

6 months

+4.7%S&P +6.3%

Aug 13, 2025 Sale Rep. Lisa McClain House

1 week

−0.6%S&P −1.5%

1 month

−1.6%S&P +2.5%

3 months

−6.2%S&P +6.3%

6 months

+4.7%S&P +6.3%

Jul 3, 2025 Buy Rep. Scott Scott Franklin House

1 week

−1.1%S&P +0.7%

1 month

−4.8%S&P +1.2%

3 months

−7.6%S&P +8.1%

6 months

−11.5%S&P +11.4%

Jun 22, 2025 Sale Rep. Jefferson Shreve House

1 week

−1.4%S&P +2.9%

1 month

−6.3%S&P +5.7%

3 months

−6.0%S&P +11.4%

6 months

−14.6%S&P +14.0%

May 12, 2025 Sale Rep. Bruce Westerman House

1 week

+3.8%S&P +1.0%

1 month

+0.4%S&P +2.9%

3 months

−1.9%S&P +10.2%

6 months

−8.3%S&P +17.1%

Apr 16, 2025 Buy Rep. Bruce Westerman House

1 week

−1.7%S&P +4.6%

1 month

+4.1%S&P +13.0%

3 months

−4.6%S&P +19.8%

6 months

−5.6%S&P +26.9%

Apr 11, 2025 Sale Rep. Jefferson Shreve House

1 week

0.0%S&P −2.2%

1 month

+1.4%S&P +9.0%

3 months

−2.7%S&P +16.1%

6 months

−3.1%S&P +23.5%

Apr 8, 2025 Sale Rep. Greg Landsman House

1 week

+0.3%S&P −4.2%

1 month

+4.6%S&P +2.9%

3 months

+0.7%S&P +14.0%

6 months

−2.1%S&P +23.0%

Mar 18, 2025 Sale Rep. Scott Scott Franklin House

1 week

+2.8%S&P +0.6%

1 month

+10.0%S&P −6.9%

3 months

+8.0%S&P +5.7%

6 months

+5.6%S&P +17.5%

Mar 5, 2025 Sale Rep. Greg Landsman House

1 week

−13.2%S&P −3.7%

1 month

−10.7%S&P −11.5%

3 months

−1.4%S&P +3.9%

6 months

−5.9%S&P +13.7%

Jan 10, 2025 Buy Rep. James Comer House

1 week

+2.5%S&P +3.7%

1 month

+15.3%S&P +3.8%

3 months

+6.0%S&P −7.0%

6 months

+3.1%S&P +8.0%

Every purchase and sale on this ticker reported by a member of Congress or an insider, measured from the close of the first trading day after it became public to the close 1 week, 1 month, 3 months and 6 months later, each beside the S&P over the same days.

Filings for COST

101 held · newest 5101 held · newest 2

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See all 101 filings for COST

Aeon news and offers by email

New sources, new features and offers like our founding price. A few times a month at most. Stop any time.

Government contracts, last 12 months

Awards of $10M and up, from USAspending · context, not a signal

No contracts of $10M or more in the last 12 months.

Lobbying

Last four quarters

No lobbying reports on file.