X0306 4 2016-01-01 0 0000785786 PLEXUS CORP PLXS 0001282797 WINSTON MARY A ONE PLEXUS WAY NEENAH WI 54956 1 0 0 0 Common Stock, $.01 par value 2016-01-01 4 M 0 2000 A 14066 D Deferred Stock Units 2016-01-01 4 M 0 2000 D Common Stock 2000 1476 D Conversion of Deferred Stock Units into shares of Plexus Corp. common stock pursuant to the reporting person's deferral election. Each Deferred Stock Unit represents a right to receive one share of Plexus Corp. common stock. The reporting person will begin to receive the underlying shares within 10 days following the earliest of termination of service as a director, a change in control or the date specified on the reporting person's deferral election. Mary A. Winston, by Kate A. Gitter, Attorney-in-Fact 2016-01-05