X0306 4 2022-01-21 0 0000785786 PLEXUS CORP PLXS 0001374160 Ninivaggi Angelo Michael Jr ONE PLEXUS WAY NEENAH WI 54956 0 1 0 0 Exec VP, CAO, Gen Coun & Secy Common Stock, $.01 par value 1455 I 401(k) Common Stock, $.01 par value 2022-01-21 4 M 0 7260 A 35401 D Common Stock, $.01 par value 2022-01-21 4 F 0 3489 80.89 D 31912 D Restricted Stock Units 2022-01-21 4 M 0 7260 D Common Stock 7260 0 D Shares of Plexus Corp. common stock held in the Plexus Corp. 401(k) Retirement Plan as of the last report from the Plan's trustee. Each Restricted Stock Unit granted under the Plexus Corp. 2016 Omnibus Incentive Plan, which qualifies under Rule 16b-3, represented a contingent right to receive one share of Plexus Corp. common stock. The Restricted Stock Units vested and settled on January 21, 2022. Angelo M. Ninivaggi, by Kate A. Gitter, Attorney-in-Fact 2022-01-24