Adam Webb Self

CIK: 0002150337

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)0 (0.0%)

Position reduction

Option Exercises (M)0 (0.0%)

Derivative conversions

Awards (A)0 (0.0%)

Compensation grants

Other (G, F, J, C, D, …)5 (100.0%)

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 (5 total)

COST
COSTCO WHOLESALE CORP /NEW
Oct 22, 2026
Tax Payment(F)
Direct
62 shares at avg. $1018.21$63K
COST
COSTCO WHOLESALE CORP /NEW
Oct 22, 2026
Tax Payment(F)
Direct
64 shares at avg. $1018.21$65K
COST
COSTCO WHOLESALE CORP /NEW
Oct 22, 2026
Tax Payment(F)
Direct
57 shares at avg. $1018.21$58K
COST
COSTCO WHOLESALE CORP /NEW
Oct 22, 2026
Tax Payment(F)
Direct
36 shares at avg. $1018.21$37K
COST
COSTCO WHOLESALE CORP /NEW
Oct 22, 2026
Tax Payment(F)
Direct
41 shares at avg. $1018.21$41K

		Type	Shares	Price		Ownership
Oct 22, 2026	COST COSTCO WHOLESALE CORP /NEW	Tax Payment(F)	62	$1018.21	$62,786	Direct
Oct 22, 2026	COST COSTCO WHOLESALE CORP /NEW	Tax Payment(F)	64	$1018.21	$65,380	Direct
Oct 22, 2026	COST COSTCO WHOLESALE CORP /NEW	Tax Payment(F)	57	$1018.21	$58,376	Direct
Oct 22, 2026	COST COSTCO WHOLESALE CORP /NEW	Tax Payment(F)	36	$1018.21	$36,700	Direct
Oct 22, 2026	COST COSTCO WHOLESALE CORP /NEW	Tax Payment(F)	41	$1018.21	$41,255	Direct

1-5 of 5 transactions

About Self Adam Webb

Self Adam Webb (SEC CIK 0002150337) files insider reports with the SEC as Executive Vice President of COSTCO WHOLESALE CORP /NEW (COST).

Signal8 holds 3 ownership filings by Self Adam Webb (2 Form 3, 1 Form 4), filed between Sep 10, 2026 and Oct 27, 2026. Those filings report 5 transactions, the latest on Oct 22, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Self Adam Webb's filings is in ISSAQUAH, WA.

Recent filings by Self Adam Webb

Oct 22, 2026: Tax withholdings of COST shares (5 lines, Form 4, code F).

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

Sullivan John Christopher, Executive VP
POLIT JAVIER, Executive Vice President
MILLERCHIP GARY, Executive Vice President
Vachris Roland Michael, President and CEO
Wilderotter Mary Agnes, Director
STANTON JOHN W, Director

How to read Form 4 transaction codes