144 0001607273 XXXXXXXX LIVE 0000785786 PLEXUS CORP 001-14423 ONE PLEXUS WAY NEENAH WI 54956 9209696000 Jermain Patrick John Officer COMMON Morgan Stanley Smith Barney LLC Executive Services

1 NEW YORK PLAZA, 8TH FLOOR NEW YORK NY 10004

4328 544029.60 27089961 05/15/2025 NASDAQ COMMON 01/24/2024 RESTRICTED STOCK ISSUER N 4328 01/25/2024 NOT APPLICABLE Y 05/15/2025 /s/ Patrick Jermain