X0306 4 2023-01-27 0 0000785786 PLEXUS CORP PLXS 0001600424 Mihm Oliver K. ONE PLEXUS WAY NEENAH WI 54956 0 1 0 0 Exec VP & COO Common Stock, $.01 par value 2023-01-27 4 M 0 5170 A 19372 D Common Stock, $.01 par value 2023-01-27 4 F 0 2491 93.56 D 16881 D Restricted Stock Units 2023-01-27 4 M 0 5170 D Common Stock 5170 0 D Restricted Stock Units 2023-01-30 4 A 0 7280 A Common Stock 7280 7280 D Performance Stock Units 2023-01-30 4 A 0 6700 A Common Stock 6700 6700 D 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 27, 2023. Each Restricted Stock Unit granted under the Plexus Corp. 2016 Omnibus Incentive Plan, which qualifies under Rule 16b-3, represents a contingent right to receive one share of Plexus Corp. common stock. The Restricted Stock Units vest on January 30, 2026. Each Performance Stock Unit ("PSU") granted under the Plexus Corp. 2016 Omnibus Incentive Plan, which qualifies under Rule 16b-3, represents a contingent right to receive one share of Plexus Corp. common stock if certain conditions are satisfied. Vesting of 3,060 PSUs is dependent on the relative total shareholder return ("TSR") of Plexus Corp.'s common stock as compared to companies in the S&P 400 Index and vesting of the remainder is based on goals related to economic return ("ER") during the three-year performance period. The target number of PSUs that may be earned is reported above. The reporting person may earn up to 150% of the targeted amount that is based on TSR and up to 200% of the targeted amount that is based on ER. Oliver K. Mihm, by Kate A. Gitter, Attorney-in-Fact 2023-01-31