JAMES HAMILTON E

Director at COSTCO WHOLESALE CORP /NEW · on record since Jun 12, 2006
Director at Blackstone Inc. · on record since Jun 21, 2007
10% owner at Silvercrest Asset Management Group Inc. · on record since Apr 25, 2017
Chairman of the Board at COSTCO WHOLESALE CORP /NEW · on record since Oct 27, 2017
10% owner at Blackstone Floating Rate Enhanced Income Fund · on record since Jan 26, 2018
Executive Vice Chairman at Blackstone Inc. · on record since May 3, 2018

Insider trading activity of JAMES HAMILTON E

Transactions on record: 227; since Sep 24, 2003

Open-market buys: 4

Open-market sells: 114; $1.9B

Companies traded: 2; last filing Oct 24, 2025

Figures computed from official regulatory filings — .

Companies where JAMES HAMILTON E has traded

COSTCO WHOLESALE CORP /NEW71 tx · $16.2M · Oct 24, 2025
Blackstone Inc.156 tx · $2.2B · Dec 7, 2021

Track record of JAMES HAMILTON E

Insufficient history for a statistical track record (fewer than 5 open-market buys).

Transaction history of JAMES HAMILTON E

Co-insiders of JAMES HAMILTON E

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
COSTCO WHOLESALE CORP /NEWListing on record	Oct 24, 2025	Award	286	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
COSTCO WHOLESALE CORP /NEWListing on record	Oct 24, 2024	Award	303	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
COSTCO WHOLESALE CORP /NEWListing on record	Jan 12, 2024	Award	18.94	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
COSTCO WHOLESALE CORP /NEWListing on record	Oct 24, 2023	Award	489	—	n/a (No price was disclosed in the filing)		SEC
COSTCO WHOLESALE CORP /NEWListing on record	Oct 18, 2023	Buy	416	—	n/a (No price was disclosed in the filing)	conv 59First in 12mo	SEC
COSTCO WHOLESALE CORP /NEWListing on record	Oct 18, 2023	Buy	413	—	n/a (No price was disclosed in the filing)	conv 59First in 12mo	SEC
COSTCO WHOLESALE CORP /NEWListing on record	Oct 18, 2023	Sell	-186	—	n/a (No price was disclosed in the filing)		SEC
COSTCO WHOLESALE CORP /NEWListing on record	Oct 18, 2023	Sell	-186	—	n/a (No price was disclosed in the filing)		SEC
COSTCO WHOLESALE CORP /NEWListing on record	Oct 18, 2023	Sell	-183	—	n/a (No price was disclosed in the filing)		SEC
COSTCO WHOLESALE CORP /NEWListing on record	Oct 18, 2023	Buy	416	—	n/a (No price was disclosed in the filing)	conv 59First in 12mo	SEC
COSTCO WHOLESALE CORP /NEWListing on record	Oct 18, 2023	Buy	461	—	n/a (No price was disclosed in the filing)	conv 59First in 12mo	SEC
COSTCO WHOLESALE CORP /NEWListing on record	Oct 25, 2022	Award	565	—	n/a (No price was disclosed in the filing)		SEC
Blackstone Inc.Listing on record	Dec 7, 2021	Sell	-930,246	134.45 USD	$125.1M	Unusual size	SEC
Blackstone Inc.Listing on record	Dec 7, 2021	Sell	-8,474	134.45 USD	$1.1M		SEC
Blackstone Inc.Listing on record	Dec 7, 2021	Sell	-1,319,754	134.45 USD	$177.4M	Unusual size	SEC
Blackstone Inc.Listing on record	Dec 7, 2021	OtherD (derivative)	-2,250,000	—	n/a (No price was disclosed in the filing)		SEC
Blackstone Inc.Listing on record	Dec 7, 2021	Sell	-12,023	134.45 USD	$1.6M		SEC
Blackstone Inc.Listing on record	Dec 7, 2021	Other	2,250,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Blackstone Inc.Listing on record	Dec 7, 2021	Sell	-2,140,934	134.45 USD	$287.8M	Unusual size	SEC
Blackstone Inc.Listing on record	Dec 7, 2021	OtherD (derivative)	-3,650,000	—	n/a (No price was disclosed in the filing)		SEC
Blackstone Inc.Listing on record	Dec 7, 2021	OtherD (derivative)	-3,074,349	—	n/a (No price was disclosed in the filing)		SEC
Blackstone Inc.Listing on record	Dec 7, 2021	Sell	-1,271,068	134.45 USD	$170.9M	Unusual size	SEC
Blackstone Inc.Listing on record	Dec 7, 2021	Other	3,650,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Blackstone Inc.Listing on record	Dec 7, 2021	Sell	-1,803,281	134.45 USD	$242.5M	Unusual size	SEC
Blackstone Inc.Listing on record	Dec 7, 2021	Other	3,074,349	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
COSTCO WHOLESALE CORP /NEWListing on record	Oct 24, 2025	Award	286	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
COSTCO WHOLESALE CORP /NEWListing on record	Oct 24, 2024	Award	303	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
COSTCO WHOLESALE CORP /NEWListing on record	Jan 12, 2024	Award	18.94	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
COSTCO WHOLESALE CORP /NEWListing on record	Oct 24, 2023	Award	489	—	n/a (No price was disclosed in the filing)		SEC
COSTCO WHOLESALE CORP /NEWListing on record	Oct 18, 2023	Buy	416	—	n/a (No price was disclosed in the filing)	conv 59First in 12mo	SEC
COSTCO WHOLESALE CORP /NEWListing on record	Oct 18, 2023	Buy	413	—	n/a (No price was disclosed in the filing)	conv 59First in 12mo	SEC
COSTCO WHOLESALE CORP /NEWListing on record	Oct 18, 2023	Sell	-186	—	n/a (No price was disclosed in the filing)		SEC
COSTCO WHOLESALE CORP /NEWListing on record	Oct 18, 2023	Sell	-186	—	n/a (No price was disclosed in the filing)		SEC
COSTCO WHOLESALE CORP /NEWListing on record	Oct 18, 2023	Sell	-183	—	n/a (No price was disclosed in the filing)		SEC
COSTCO WHOLESALE CORP /NEWListing on record	Oct 18, 2023	Buy	416	—	n/a (No price was disclosed in the filing)	conv 59First in 12mo	SEC
COSTCO WHOLESALE CORP /NEWListing on record	Oct 18, 2023	Buy	461	—	n/a (No price was disclosed in the filing)	conv 59First in 12mo	SEC
COSTCO WHOLESALE CORP /NEWListing on record	Oct 25, 2022	Award	565	—	n/a (No price was disclosed in the filing)		SEC
Blackstone Inc.Listing on record	Dec 7, 2021	Sell	-930,246	134.45 USD	$125.1M	Unusual size	SEC
Blackstone Inc.Listing on record	Dec 7, 2021	Sell	-8,474	134.45 USD	$1.1M		SEC
Blackstone Inc.Listing on record	Dec 7, 2021	Sell	-1,319,754	134.45 USD	$177.4M	Unusual size	SEC
Blackstone Inc.Listing on record	Dec 7, 2021	OtherD (derivative)	-2,250,000	—	n/a (No price was disclosed in the filing)		SEC
Blackstone Inc.Listing on record	Dec 7, 2021	Sell	-12,023	134.45 USD	$1.6M		SEC
Blackstone Inc.Listing on record	Dec 7, 2021	Other	2,250,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Blackstone Inc.Listing on record	Dec 7, 2021	Sell	-2,140,934	134.45 USD	$287.8M	Unusual size	SEC
Blackstone Inc.Listing on record	Dec 7, 2021	OtherD (derivative)	-3,650,000	—	n/a (No price was disclosed in the filing)		SEC
Blackstone Inc.Listing on record	Dec 7, 2021	OtherD (derivative)	-3,074,349	—	n/a (No price was disclosed in the filing)		SEC
Blackstone Inc.Listing on record	Dec 7, 2021	Sell	-1,271,068	134.45 USD	$170.9M	Unusual size	SEC
Blackstone Inc.Listing on record	Dec 7, 2021	Other	3,650,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Blackstone Inc.Listing on record	Dec 7, 2021	Sell	-1,803,281	134.45 USD	$242.5M	Unusual size	SEC
Blackstone Inc.Listing on record	Dec 7, 2021	Other	3,074,349	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC