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 *
NUSSBAUM JOHN L
  2. Issuer Name and Ticker or Trading Symbol
PLEXUS CORP [PLXS]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
_____ Officer (give title below) __X__ Other (specify below)
Chairman of the Board
(Last)
(First)
(Middle)
55 JEWELERS PARK DRIVE
3. Date of Earliest Transaction (Month/Day/Year)
08/07/2009
(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               4,257 I 401(k) (1)
Common Stock, $.01 par value 08/07/2009   S   9,200 D $ 26.6119 128,918 D (2)  
Common Stock, $.01 par value 08/07/2009   S   800 D $ 26.595 128,118 D (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             04/24/2001 04/24/2010 Common Stock 40,000   40,000 D  
Option to buy $ 23.55             04/06/2002 04/06/2011 Common Stock 25,752   25,752 D  
Option to buy $ 18.125             06/01/2004 12/01/2013 Common Stock 6,000   6,000 D  
Option to buy $ 22.04             12/01/2005 12/01/2015 Common Stock 10,000   10,000 D  
Option to buy $ 23.855             12/01/2006 12/01/2016 Common Stock 10,000   10,000 D  
Option to buy $ 27.465             11/23/2007 11/23/2017 Common Stock 2,500   2,500 D  
Option to buy $ 22.17             01/28/2008 01/28/2018 Common Stock 2,500   2,500 D  
Option to buy $ 24.21             04/28/2008(3) 04/28/2018 Common Stock 2,500   2,500 D  
Option to buy $ 29.71             07/29/2008(3) 07/29/2018 Common Stock 2,500   2,500 D  
Option to buy $ 14.17             11/19/2008(3) 11/19/2018 Common Stock 2,500   2,500 D  
Option to buy $ 14.625             02/02/2009(3) 02/02/2019 Common Stock 2,500   2,500 D  
Option to buy $ 20.953             05/04/2009(3) 05/04/2019 Common Stock 2,500   2,500 D  
Option to buy $ 25.751             08/03/2009(3) 08/03/2019 Common Stock 2,500   2,500 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
NUSSBAUM JOHN L
55 JEWELERS PARK DRIVE
NEENAH, WI 54956
  X     Chairman of the Board

Signatures

 John L. Nussbaum, by Angelo M. Ninivaggi, Attorney-in-Fact   08/10/2009
**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. 401(k) Savings Plan as of the last date of a statement from the Plan's trustee.
(2) Shares of Plexus Corp. common stock held in the John L. and Sandra K. Nussbaum Revocable Trust.
(3) Options granted under the Plexus Corp. 2008 Long-Term Incentive Plan, which qualifies under Rule 16b-3; one half vested immediately, and the other half vest on the first anniversary of grant date.

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