X0304 4 2011-10-31 0 0000785786 PLEXUS CORP PLXS 0001411282 Kelsey Todd P. ONE PLEXUS WAY NEENAH WI 54956 0 1 0 0 Exec. VP Global Customer Serv Common Stock, $.01 par value 2011-10-31 4 M 0 4975 A 8495 D Common Stock, $.01 par value 269 D Common Stock, $.01 par value 2464 I 401(k) Option to Buy 25.92 2011-10-31 4 A 0 6250 A 2012-10-31 2021-10-31 Common Stock 6250 6250 D Restricted Stock Units 2011-10-31 4 M 0 4975 D Common Stock 4975 0 D Each Restricted Stock Unit granted under the Plexus Corp. 2008 Long-Term 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 October 31, 2011. Shares of Plexus Corp. common stock held in the Plexus Corp. Employee Stock Purchase Plan as of the last report from the Plan's Trustee. Shares of Plexus Corp. common stock held in the Plexus Corp. 401(k) Savings Plan as of the last report from the Plan's trustee. Options granted under the Plexus Corp. 2008 Long-Term Incentive Plan, which qualifies under Rule 16b-3; one half vests each year, commencing on the first anniversary of grant. The reporting persons of Plexus Corp. are now using transactional reporting in Section 16 filings. Todd P. Kelsey, by Mary J. Bathke, Attorney-in-Fact 2011-11-01