144 0001607273 XXXXXXXX LIVE 0000785786 PLEXUS CORP. 001-14423 One Plexus Way Neenah WI 54957 (920) 969-6000 PATRICK JERMAIN Officer Common Morgan Stanley Smith Barney LLC Executive Financial Services

1 New York Plaza 8th Floor New York NY 10004

2000 287070.00 26986726 11/11/2025 NASDAQ Common 01/25/2019 Restricted Stock Issuer N 2000 01/25/2019 Not Applicable N PATRICK JERMAIN

One Plexus Way Neenah WI 54957

Common 10/27/2025 1998 285314.40 PATRICK JERMAIN

One Plexus Way Neenah WI 54957

Common 08/27/2025 2500 344275.00 Sales that were executed on November 11, 2025 are being reported on this Form 144 filed on November 12, 2025 given the EDGAR system was not accepting filings on November 11, 2025 in observance of the federal holiday. 11/11/2025 /s/ Patrick Jermain