Sec Form 4 Filing - CZAJKOWSKI THOMAS J @ PLEXUS CORP - 2008-10-31

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person CZAJKOWSKI THOMAS J 2. Issuer Name and Ticker or Trading Symbol PLEXUS CORP [ PLXS] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Vice President (Last) (First) (Middle) 55 JEWELERS PARK DRIVE 3. Date of Earliest Transaction (MM/DD/YY) 10/31/2008 (Street) NEENAH, WI54956 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock, $.01 par value 5,800 D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Option to buy ( 1 ) $ 28.495 ( 1 ) 07/09/2011 Common Stock 2,000 2,000 D Option to buy ( 1 ) $ 25.285 ( 1 ) 04/22/2012 Common Stock 5,000 5,000 D Option to buy ( 1 ) $ 14.015 ( 1 ) 08/14/2013 Common Stock 3,804 3,804 D Option to buy ( 1 ) $ 12.94 ( 1 ) 05/18/2015 Common Stock 5,000 5,000 D Option to buy ( 2 ) $ 42.515 05/17/2007( 2 ) 05/17/2016 Common Stock 8,000 8,000 D Option to buy ( 3 ) $ 21.41 05/17/2008( 3 ) 05/17/2017 Common Stock 2,000 2,000 D Option to buy ( 3 ) $ 23.83 08/01/2008( 3 ) 08/01/2017 Common Stock 2,000 2,000 D Option to buy ( 3 ) $ 30.54 11/05/2008( 3 ) 11/05/2017 Common Stock 1,000 1,000 D Option to buy ( 3 ) $ 22.17 01/28/2009( 3 ) 01/28/2018 Common Stock 1,000 1,000 D Option to buy ( 4 ) $ 24.21 04/28/2009( 4 ) 04/28/2018 Common Stock 1,000 1,000 D Option to buy ( 4 ) $ 29.71 07/29/2009( 4 ) 07/29/2018 Common Stock 1,000 1,000 D Option to buy ( 4 ) $ 18.085 10/31/2008 A 1,000 10/31/2009( 4 ) 10/31/2018 Common Stock 1,000 ( 4 ) 1,000 D Restricted Stock Units ( 5 ) ( 6 ) ( 6 ) Common Stock 1,140 1,140 D Restricted Stock Units ( 7 ) 10/31/2008 A 995 ( 8 ) ( 8 ) Common Stock 995 ( 7 ) 995 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other CZAJKOWSKI THOMAS J 55 JEWELERS PARK DRIVE NEENAH, WI54956 Vice President Signatures Thomas J. Czajkowski, by Angelo Ninivaggi, Attorney-in-Fact 11/04/2008 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Options granted under the Plexus Corp. 2005 Equity Incentive Plan, or a predecessor plan, which qualify under Rule 16b-3; now fully vested. ( 2 )Options granted under the Plexus Corp. 2005 Equity Incentive Plan, which qualifies under Rule 16b-3; one third vest each year, commencing on the first anniversary of grant. ( 3 )Options granted under the Plexus Corp. 2005 Equity Incentive Plan, which qualifies under Rule 16b-3; one half vest each year, commencing on the first anniversary of grant. ( 4 )Options granted under the Plexus Corp. 2008 Long-Term Incentive Plan, which qualifies under Rule 16b-3; one half vest each year, commencing on the first anniversary of grant. ( 5 )Each Restricted Stock Unit granted under the Plexus Corp. 2005 Equity Incentive Plan, which qualifies under Rule 16b-3; represents a contingent right to receive one share of Plexus Corp. Common Stock. ( 6 )The Restricted Stock Units vest on November 5, 2010. ( 7 )Each Restricted Stock Unit granted under the Plexus Corp. 2008 Long-Term Incentive Plan, which qualifies under Rule 16b-3; represents a contingent right to receive one share of Plexus Corp. Common Stock. ( 8 )The Restricted Stock Units vest on October 31, 2011.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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