Laurent Sellier - President and Chief Executive Officer, North America (including Mexico). Exhibit 24.1 Power of Attorney. at Smurfit Westrock plc

Insider Transactions and Holdings

Entity Type: Individual
Role: President and Chief Executive Officer, North America (including Mexico). Exhibit 24.1 Power of Attorney.
Stock Symbol: SW on NYSE
Industry: Paperboard Containers & Boxes
All Insider Reports: All Insider Reports

There are no Buy or Sell transactions made by Laurent Sellier since 11/30/2024

Holdings reported by Laurent Sellier for Smurfit Westrock plc

Security	Num Shares	Value	Price $	Transaction Date	Ownership	Underlying Class	Underlying Amount
Ordinary Shares	98.9K	$4.59M	$46.39	Sep 18, 2025	Direct
Ordinary Shares	3.19K	$148K	$46.39	Sep 18, 2025	Shares owned by spouse
Restricted Stock Units (PSP)	67.7K			Sep 18, 2025	Direct	Ordinary Shares
Restricted Stock Units (DBP)	18.8K			Feb 14, 2025	Direct	Ordinary Shares

Transactions reported by Laurent Sellier for Smurfit Westrock plc

Sym	Class	Transaction	%	Value $	* Price $	Shares	Shares After	Date	Ownership

* An asterisk sign (*) next to the price indicates that the price is likely invalid.