Ownership Submission
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 OF SECURITIES

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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(Print or Type Responses)
1. Name and Address of Reporting Person *
Kelsey Todd P.
   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)
Sr VP Global Customer Services
(Last)
(First)
(Middle)
55 JEWELERS PARK DRIVE		 3. Date of Earliest Transaction (Month/Day/Year)
12/04/2009
(Street)

NEENAH, WI 54956		 4. If Amendment, Date Original Filed(Month/Day/Year)
 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 (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 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 12/04/2009   M   3,600 A $ 8.975 3,700 D  
Common Stock, $.01 par value 12/04/2009   S   3,600 D $ 28.75 100 D  
Common Stock, $.01 par value               269 D (1)  
Common Stock, $.01 par value               2,101 I 401(k) (2)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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 (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 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
(Month/Day/Year)		 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 $ 35.5469               (3) 04/24/2010 Common Stock 4,800   4,800 D  
Option to Buy $ 23.55               (3) 04/06/2011 Common Stock 2,400   2,400 D  
Option to Buy $ 25.285               (3) 04/22/2012 Common Stock 3,600   3,600 D  
Option to Buy $ 8.975 12/04/2009   M     3,600   (3) 01/30/2013 Common Stock 3,600 $ 0 0 D  
Option to Buy $ 14.015               (3) 08/14/2013 Common Stock 4,000   4,000 D  
Option to Buy $ 15.825               (3) 04/28/2014 Common Stock 5,000   5,000 D  
Option to Buy $ 12.94               (3) 05/18/2015 Common Stock 3,000   3,000 D  
Option to Buy $ 42.515               (3) 05/17/2016 Common Stock 5,000   5,000 D  
Option to Buy $ 21.41               (3) 05/17/2017 Common Stock 2,500   2,500 D  
Option to Buy $ 23.83               (3) 08/01/2017 Common Stock 2,500   2,500 D  
Option to Buy $ 30.54               (3) 11/05/2017 Common Stock 3,000   3,000 D  
Option to Buy $ 22.17             01/28/2009(4) 01/28/2018 Common Stock 3,000   3,000 D  
Option to Buy $ 24.21             04/28/2009(5) 04/28/2018 Common Stock 3,000   3,000 D  
Option to Buy $ 29.71             07/29/2009(5) 07/29/2018 Common Stock 3,000   3,000 D  
Option to Buy $ 18.085             10/31/2009(5) 10/31/2018 Common Stock 5,000   5,000 D  
Option to Buy $ 14.625             02/02/2010(5) 02/02/2019 Common Stock 5,000   5,000 D  
Option to Buy $ 20.953             05/04/2010(5) 05/04/2019 Common Stock 5,000   5,000 D  
Option to Buy $ 25.751             08/03/2010(5) 08/03/2019 Common Stock 5,000   5,000 D  
Option to Buy $ 25.335             11/02/2010(5) 11/02/2019 Common Stock 5,000   5,000 D  
Restricted Stock Units (6)               (6)   (6) Common Stock 3,420   3,420 D  
Restricted Stock Units (7)               (7)   (7) Common Stock 4,975   4,975 D  
Restricted Stock Units (8)               (8)   (8) Common Stock 20,000   20,000 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Kelsey Todd P.
55 JEWELERS PARK DRIVE
NEENAH, WI 54956		       Sr VP Global Customer Services  

Signatures

 Todd P. Kelsey, by Angelo M. Ninivaggi, Attorney-in-Fact   12/04/2009
**Signature of Reporting Person Date

Explanation of Responses:

* 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).
(1) Shares of Plexus Corp. common stock held in the Plexus Corp. Employee Stock Purchase Plan as of the last date of a statement from the Plan's Trustee.
(2) Shares of Plexus Corp. common stock held in the Plexus Corp. 401(k) Savings Plan as of the last date of a statement from the Plan's trustee.
(3) Options granted under the Plexus Corp. 2005 Equity Incentive Plan, or a predecessor plan, which qualifies under Rule 16b-3; now fully vested.
(4) Options granted under the Plexus Corp. 2005 Equity Incentive Plan, which qualifies under Rule 16b-3; one half vests each year, commencing on the first anniversary of grant.
(5) 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.
(6) 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. 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. The Restricted Stock Units vest on October 31, 2011.
(8) 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. The Restricted Stock Units vest on August 3, 2012.
 
Remarks:
Options were exercised and the underlying shares were sold pursuant to a Rule 10b5-1 plan.

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