Saverio Mayer - President and Chief Executive Officer, Europe, MEA and APAC. Exhibit 24.1 - Power of attorney at Smurfit Westrock plc

Insider Transactions and Holdings

Entity Type: Individual
Role: President and Chief Executive Officer, Europe, MEA and APAC. Exhibit 24.1 - Power of attorney
Stock Symbol: SW on NYSE
Industry: Paperboard Containers & Boxes
All Insider Reports: All Insider Reports

Saverio Mayer - trading volume in the past year for Smurfit Westrock plc

	Shares	%	Avg Price	Total $
Buys
Sells	-25K	100%	$54.84	-$1.37M
Net	-25K	-100%		-$1.37M

Holdings reported by Saverio Mayer for Smurfit Westrock plc

Security	Num Shares	Value	Price $	Transaction Date	Ownership	Underlying Class	Underlying Amount
Ordinary Shares	190K	$8.79M	$46.39	Sep 18, 2025	Direct
Restricted Stock Units (PSP)	80.4K			Sep 18, 2025	Direct	Ordinary Shares
Restricted Stock Units (DBP)	23.2K			Feb 14, 2025	Direct	Ordinary Shares

Transactions reported by Saverio Mayer 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.