John Christopher Sullivan

CIK: 0001902272

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)3 (16.7%)

Compensation grants

Other (G, F, J, C, D, …)15 (83.3%)

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 (18 total)

COST
COSTCO WHOLESALE CORP /NEW
Oct 22, 2026
Award(A)
Direct
4.6K shares-
COST
COSTCO WHOLESALE CORP /NEW
Oct 22, 2026
Tax Payment(F)
Direct
573 shares at avg. $1018.21$583K
COST
COSTCO WHOLESALE CORP /NEW
Oct 22, 2026
Tax Payment(F)
Direct
647 shares at avg. $1018.21$659K
COST
COSTCO WHOLESALE CORP /NEW
Oct 22, 2026
Tax Payment(F)
Direct
975 shares at avg. $1018.21$993K
COST
COSTCO WHOLESALE CORP /NEW
Oct 22, 2026
Tax Payment(F)
Direct
732 shares at avg. $1018.21$746K
COST
COSTCO WHOLESALE CORP /NEW
Oct 22, 2026
Tax Payment(F)
Direct
836 shares at avg. $1018.21$851K
COST
COSTCO WHOLESALE CORP /NEW
Oct 22, 2025
Award(A)
Direct
4.7K shares-
COST
COSTCO WHOLESALE CORP /NEW
Oct 22, 2025
Tax Payment(F)
Direct
421 shares at avg. $944.68$398K
COST
COSTCO WHOLESALE CORP /NEW
Oct 22, 2025
Tax Payment(F)
Direct
573 shares at avg. $944.68$541K
COST
COSTCO WHOLESALE CORP /NEW
Oct 22, 2025
Tax Payment(F)
Direct
569 shares at avg. $944.68$537K
COST
COSTCO WHOLESALE CORP /NEW
Oct 22, 2025
Tax Payment(F)
Direct
585 shares at avg. $944.68$552K
COST
COSTCO WHOLESALE CORP /NEW
Oct 22, 2025
Tax Payment(F)
Direct
366 shares at avg. $944.68$346K
COST
COSTCO WHOLESALE CORP /NEW
Oct 22, 2024
Award(A)
Direct
7.4K shares-
COST
COSTCO WHOLESALE CORP /NEW
Oct 22, 2024
Tax Payment(F)
Direct
514 shares at avg. $893.49$460K
COST
COSTCO WHOLESALE CORP /NEW
Oct 22, 2024
Tax Payment(F)
Direct
421 shares at avg. $893.49$377K
COST
COSTCO WHOLESALE CORP /NEW
Oct 22, 2024
Tax Payment(F)
Direct
573 shares at avg. $893.49$512K
COST
COSTCO WHOLESALE CORP /NEW
Oct 22, 2024
Tax Payment(F)
Direct
427 shares at avg. $893.49$382K
COST
COSTCO WHOLESALE CORP /NEW
Oct 22, 2024
Tax Payment(F)
Direct
585 shares at avg. $893.49$523K

		Type	Shares	Price		Ownership
Oct 22, 2026	COST COSTCO WHOLESALE CORP /NEW	Award(A)	4,552	-	$0	Direct
Oct 22, 2026	COST COSTCO WHOLESALE CORP /NEW	Tax Payment(F)	573	$1018.21	$583,265	Direct
Oct 22, 2026	COST COSTCO WHOLESALE CORP /NEW	Tax Payment(F)	647	$1018.21	$659,084	Direct
Oct 22, 2026	COST COSTCO WHOLESALE CORP /NEW	Tax Payment(F)	975	$1018.21	$992,775	Direct
Oct 22, 2026	COST COSTCO WHOLESALE CORP /NEW	Tax Payment(F)	732	$1018.21	$745,639	Direct
Oct 22, 2026	COST COSTCO WHOLESALE CORP /NEW	Tax Payment(F)	836	$1018.21	$851,014	Direct
Oct 22, 2025	COST COSTCO WHOLESALE CORP /NEW	Award(A)	4,654	-	-	Direct
Oct 22, 2025	COST COSTCO WHOLESALE CORP /NEW	Tax Payment(F)	421	$944.68	$397,720	Direct
Oct 22, 2025	COST COSTCO WHOLESALE CORP /NEW	Tax Payment(F)	573	$944.68	$541,141	Direct
Oct 22, 2025	COST COSTCO WHOLESALE CORP /NEW	Tax Payment(F)	569	$944.68	$537,419	Direct
Oct 22, 2025	COST COSTCO WHOLESALE CORP /NEW	Tax Payment(F)	585	$944.68	$552,496	Direct
Oct 22, 2025	COST COSTCO WHOLESALE CORP /NEW	Tax Payment(F)	366	$944.68	$345,715	Direct
Oct 22, 2024	COST COSTCO WHOLESALE CORP /NEW	Award(A)	7,433	-	$0	Direct
Oct 22, 2024	COST COSTCO WHOLESALE CORP /NEW	Tax Payment(F)	514	$893.49	$459,566	Direct
Oct 22, 2024	COST COSTCO WHOLESALE CORP /NEW	Tax Payment(F)	421	$893.49	$376,529	Direct
Oct 22, 2024	COST COSTCO WHOLESALE CORP /NEW	Tax Payment(F)	573	$893.49	$511,821	Direct
Oct 22, 2024	COST COSTCO WHOLESALE CORP /NEW	Tax Payment(F)	427	$893.49	$381,865	Direct
Oct 22, 2024	COST COSTCO WHOLESALE CORP /NEW	Tax Payment(F)	585	$893.49	$522,559	Direct

1-18 of 18 transactions

About Sullivan John Christopher

Sullivan John Christopher (SEC CIK 0001902272) files insider reports with the SEC as Executive VP of COSTCO WHOLESALE CORP /NEW (COST).

Signal8 holds 3 ownership filings by Sullivan John Christopher, all Form 4s, filed between Oct 24, 2024 and Oct 27, 2026. Those filings report 18 transactions, from Oct 22, 2024 to Oct 22, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Sullivan John Christopher's filings is in ISSAQUAH, WA.

Recent filings by Sullivan John Christopher

Oct 22, 2026: Grant or award of COST shares (Form 4, code A).
Oct 22, 2026: Tax withholdings of COST shares (5 lines, Form 4, code F).
Oct 22, 2025: Grant or award of COST shares (Form 4, code A).
Oct 22, 2025: Tax withholdings of COST shares (5 lines, Form 4, code F).
Oct 22, 2024: Grant or award of COST shares (Form 4, code A).

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

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
STANTON JOHN W, Director

How to read Form 4 transaction codes