Claudine Adamo

CIK: 0001916124

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)5 (19.2%)

Position reduction

Option Exercises (M)0 (0.0%)

Derivative conversions

Awards (A)3 (11.5%)

Compensation grants

Other (G, F, J, C, D, …)18 (69.2%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

COST

COSTCO WHOLESALE CORP /NEW

Officer

Discretionary Trading P&L

Holdings

Transaction History (26 total)

COST
COSTCO WHOLESALE CORP /NEW
Oct 22, 2026
Tax Payment(F)
Direct
198 shares at avg. $1018.21$202K
COST
COSTCO WHOLESALE CORP /NEW
Oct 22, 2026
Tax Payment(F)
Direct
177 shares at avg. $1018.21$180K
COST
COSTCO WHOLESALE CORP /NEW
Oct 22, 2026
Tax Payment(F)
Direct
111 shares at avg. $1018.21$113K
COST
COSTCO WHOLESALE CORP /NEW
Oct 22, 2026
Tax Payment(F)
Direct
109 shares at avg. $1018.21$111K
COST
COSTCO WHOLESALE CORP /NEW
Oct 22, 2026
Tax Payment(F)
Direct
97 shares at avg. $1018.21$99K
COST
COSTCO WHOLESALE CORP /NEW
Sep 29, 2026
Sale(S)
Direct
2.2K shares at avg. $915.93$2.0M
COST
COSTCO WHOLESALE CORP /NEW
Sep 10, 2026
Tax Payment(F)
Direct
917 shares at avg. $902.38$827K
COST
COSTCO WHOLESALE CORP /NEW
Sep 10, 2026
Award(A)
Direct
4.1K shares-
COST
COSTCO WHOLESALE CORP /NEW
Mar 9, 2026
Sale(S)
Direct
730 shares at avg. $1003.02$732K
COST
COSTCO WHOLESALE CORP /NEW
Oct 24, 2025
Sale(S)
Direct
2.7K shares at avg. $935.68$2.5M
COST
COSTCO WHOLESALE CORP /NEW
Oct 22, 2025
Tax Payment(F)
Direct
177 shares at avg. $944.68$167K
COST
COSTCO WHOLESALE CORP /NEW
Oct 22, 2025
Tax Payment(F)
Direct
111 shares at avg. $944.68$104K
COST
COSTCO WHOLESALE CORP /NEW
Oct 22, 2025
Tax Payment(F)
Direct
97 shares at avg. $944.68$92K
COST
COSTCO WHOLESALE CORP /NEW
Oct 22, 2025
Tax Payment(F)
Direct
122 shares at avg. $944.68$115K
COST
COSTCO WHOLESALE CORP /NEW
Oct 22, 2025
Tax Payment(F)
Direct
199 shares at avg. $944.68$188K
COST
COSTCO WHOLESALE CORP /NEW
Sep 10, 2025
Award(A)
Direct
4.2K shares-
COST
COSTCO WHOLESALE CORP /NEW
Sep 10, 2025
Tax Payment(F)
Direct
950 shares at avg. $956.29$908K
COST
COSTCO WHOLESALE CORP /NEW
Mar 24, 2025
Sale(S)
Direct
900 shares at avg. $922.56$830K
COST
COSTCO WHOLESALE CORP /NEW
Oct 22, 2024
Tax Payment(F)
Direct
198 shares at avg. $893.49$177K
COST
COSTCO WHOLESALE CORP /NEW
Oct 22, 2024
Tax Payment(F)
Direct
177 shares at avg. $893.49$158K
COST
COSTCO WHOLESALE CORP /NEW
Oct 22, 2024
Tax Payment(F)
Direct
97 shares at avg. $893.49$87K
COST
COSTCO WHOLESALE CORP /NEW
Oct 22, 2024
Tax Payment(F)
Direct
149 shares at avg. $893.49$133K
COST
COSTCO WHOLESALE CORP /NEW
Oct 22, 2024
Tax Payment(F)
Direct
122 shares at avg. $893.49$109K
COST
COSTCO WHOLESALE CORP /NEW
Sep 30, 2024
Sale(S)
Direct
3.2K shares at avg. $888.99$2.8M
COST
COSTCO WHOLESALE CORP /NEW
Sep 16, 2024
Tax Payment(F)
Direct
1.6K shares at avg. $907.87$1.5M

		Type	Shares	Price		Ownership
Oct 22, 2026	COST COSTCO WHOLESALE CORP /NEW	Tax Payment(F)	198	$1018.21	$201,900	Direct
Oct 22, 2026	COST COSTCO WHOLESALE CORP /NEW	Tax Payment(F)	177	$1018.21	$180,282	Direct
Oct 22, 2026	COST COSTCO WHOLESALE CORP /NEW	Tax Payment(F)	111	$1018.21	$112,988	Direct
Oct 22, 2026	COST COSTCO WHOLESALE CORP /NEW	Tax Payment(F)	109	$1018.21	$110,585	Direct
Oct 22, 2026	COST COSTCO WHOLESALE CORP /NEW	Tax Payment(F)	97	$1018.21	$98,707	Direct
Sep 29, 2026	COST COSTCO WHOLESALE CORP /NEW	Sale(S)	2,200	$915.93	$2,015,046	Direct
Sep 10, 2026	COST COSTCO WHOLESALE CORP /NEW	Tax Payment(F)	917	$902.38	$827,198	Direct
Sep 10, 2026	COST COSTCO WHOLESALE CORP /NEW	Award(A)	4,129	-	$0	Direct
Mar 9, 2026	COST COSTCO WHOLESALE CORP /NEW	Sale(S)	730	$1003.02	$732,205	Direct
Oct 24, 2025	COST COSTCO WHOLESALE CORP /NEW	Sale(S)	2,700	$935.68	$2,526,336	Direct
Oct 22, 2025	COST COSTCO WHOLESALE CORP /NEW	Tax Payment(F)	177	$944.68	$166,887	Direct
Oct 22, 2025	COST COSTCO WHOLESALE CORP /NEW	Tax Payment(F)	111	$944.68	$104,453	Direct
Oct 22, 2025	COST COSTCO WHOLESALE CORP /NEW	Tax Payment(F)	97	$944.68	$91,577	Direct
Oct 22, 2025	COST COSTCO WHOLESALE CORP /NEW	Tax Payment(F)	122	$944.68	$115,043	Direct
Oct 22, 2025	COST COSTCO WHOLESALE CORP /NEW	Tax Payment(F)	199	$944.68	$187,698	Direct
Sep 10, 2025	COST COSTCO WHOLESALE CORP /NEW	Award(A)	4,219	-	-	Direct
Sep 10, 2025	COST COSTCO WHOLESALE CORP /NEW	Tax Payment(F)	950	$956.29	$908,156	Direct
Mar 24, 2025	COST COSTCO WHOLESALE CORP /NEW	Sale(S)	900	$922.56	$830,304	Direct
Oct 22, 2024	COST COSTCO WHOLESALE CORP /NEW	Tax Payment(F)	198	$893.49	$177,169	Direct
Oct 22, 2024	COST COSTCO WHOLESALE CORP /NEW	Tax Payment(F)	177	$893.49	$157,842	Direct
Oct 22, 2024	COST COSTCO WHOLESALE CORP /NEW	Tax Payment(F)	97	$893.49	$86,974	Direct
Oct 22, 2024	COST COSTCO WHOLESALE CORP /NEW	Tax Payment(F)	149	$893.49	$132,788	Direct
Oct 22, 2024	COST COSTCO WHOLESALE CORP /NEW	Tax Payment(F)	122	$893.49	$109,165	Direct
Sep 30, 2024	COST COSTCO WHOLESALE CORP /NEW	Sale(S)	3,200	$888.99	$2,844,778	Direct
Sep 16, 2024	COST COSTCO WHOLESALE CORP /NEW	Tax Payment(F)	1,602	$907.87	$1,454,545	Direct

1-25 of 26 transactions

About Adamo Claudine

Adamo Claudine (SEC CIK 0001916124) files insider reports with the SEC as Executive Vice President of COSTCO WHOLESALE CORP /NEW (COST).

Signal8 holds 10 ownership filings by Adamo Claudine, all Form 4s, filed between Sep 18, 2024 and Oct 26, 2026. Those filings report 26 transactions, from Sep 16, 2024 to Oct 22, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Adamo Claudine's filings is in ISSAQUAH, WA.

Recent filings by Adamo Claudine

Oct 22, 2026: Tax withholdings of COST shares (5 lines, Form 4, code F).
Sep 29, 2026: Open-market sale of COST shares (Form 4, code S).
Sep 10, 2026: Tax withholding of COST shares (Form 4, code F).
Sep 10, 2026: Grant or award of COST shares (Form 4, code A).
Mar 9, 2026: Open-market sale of COST shares (Form 4, code S).

Other insiders filing for COSTCO WHOLESALE CORP /NEW (COST)

Sullivan John Christopher, Executive VP
Self Adam Webb, Executive Vice President
POLIT JAVIER, Executive Vice President
MILLERCHIP GARY, Executive Vice President
Vachris Roland Michael, President and CEO
Wilderotter Mary Agnes, Director

How to read Form 4 transaction codes