144 0001411282 XXXXXXXX LIVE 0000785786 Plexus Corp. 001-14423 One Plexus Way Neenah WI 54956 920-969-6000 Todd P. Kelsey President & CEO Common ROBERT W BAIRD & CO.

777 E WISCONSIN AVE MILWAUKEE WI 53202

26158 4020746 27092389 11/19/2024 NASDAQ Common 11/16/2023 Vesting of Performance Stock Units Issuer N 7359 11/16/2023 Compensation Common 01/27/2023 Vesting of Restricted Stock Units Issuer N 18799 01/27/2023 Compensation N Todd P. Kelsey

One Plexus Way Neenah WI 54956

Common 08/19/2024 2000 250000 Todd P. Kelsey

One Plexus Way Neenah WI 54956

Common 11/04/2024 4000 593930 Todd P. Kelsey

One Plexus Way Neenah WI 54956

Common 11/06/2024 4000 659303.2 The sales of securities covered hereby are being made pursuant to a trading plan adopted on August 16, 2024. 11/19/2024 08/16/2024 /s/ Todd P. Kelsey, by Kate A. Gitter, Attorney-in-Fact