X0306 4 2020-11-18 0 0000785786 PLEXUS CORP PLXS 0001411281 Lim Yong Jin PLOT 87 LEBUHRAYA KAMPUNG JAWA, 11900 BAYAN LEPAS PENANG N8 - MALAYSIA 0 1 0 0 Regional Pres - Plxs Asia Pac. Common Stock, $.01 par value 2020-11-18 4 M 0 6160 A 62814 D Performance Stock Units 2020-11-18 4 A 0 3080 A Common Stock 3080 8320 D Performance Stock Units 2020-11-18 4 M 0 6160 D Common Stock 6160 2160 D Based on Company performance during the three-year performance period, 200% of the portion of the Performance Stock Units ("PSUs") granted in fiscal 2018 related to economic return goals vested. The three-year performance period for the portion of the PSUs that vests based on the relative total shareholder return ("TSR") of the Company's common stock as compared to companies in the Russell 3000 Index has yet to conclude. As previously disclosed, the reporting person has the opportunity to earn up to 200% of the number of PSUs originally reported. Yong Jin Lim, by Kate A. Gitter, Attorney-in-Fact 2020-11-20