X0306 4 2020-01-23 0 0000785786 PLEXUS CORP PLXS 0001600425 Darroch Ronnie ONE PLEXUS WAY NEENAH WI 54956 0 1 0 0 Exec VP & Reg Pres-EMEA Common Stock, $.01 par value 2020-01-23 4 M 0 7880 A 14338 D Common Stock, $.01 par value 2020-01-23 4 F 0 2580 80.49 D 11758 D Common Stock, $.01 par value 2020-01-27 4 S 0 3800 76.4192 D 7958 D Common Stock, $.01 par value 2020-01-27 4 S 0 1200 76.7929 D 6758 D Restricted Stock Units 2020-01-23 4 M 0 7880 D Common Stock 7880 0 D Restricted Stock Units 2020-01-27 4 A 0 5320 A Common Stock 5320 5320 D Performance Stock Units 2020-01-27 4 A 0 4540 A Common Stock 4540 4540 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 23, 2020. This transaction was executed in multiple trades at prices ranging from $76.02 to $76.62 per share. The reported price reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. This transaction was executed in multiple trades at prices ranging from $76.645 to $77.05 per share. The reported price reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. 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 27, 2023. 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 the PSUs is dependent on the relative total shareholder return ("TSR") of Plexus Corp.'s common stock as compared to companies in the Russell 3000 Index and on goals related to economic return during the three-year performance period. The target number of PSUs that may be earned is reported above; the maximum amount is 200% of the number reported. Ronald Darroch, by Kate A. Gitter, Attorney-in-Fact 2020-01-27