SEC FORM 3

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

Mauthe Joseph

(Last)

(First)

(Middle)

55 JEWELERS PARK DRIVE

(Street)

NEENAH

54956

(City)

(State)

(Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
02/13/2008

3. Issuer Name and Ticker or Trading Symbol
PLEXUS CORP [ PLXS ]

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	VP Global Human Resources

5. If Amendment, Date of 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

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock, $.01 par value	512	I	401(k)⁽¹⁾
Common Stock, $.01 par value	0	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivative Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
Option to buy⁽²⁾	03/12/2008⁽²⁾	03/12/2017	Common Stock	4,000	$16.25	D
Stock Appreciation Rights⁽³⁾	11/05/2008⁽³⁾	11/05/2014	Common Stock	550	$30.54	D
Stock Appreciation Rights⁽³⁾	01/28/2009⁽³⁾	01/28/2015	Common Stock	550	$22.17	D
Restricted Stock Unit	⁽⁴⁾	⁽⁴⁾	Common Stock	641	⁽⁵⁾	D

Explanation of Responses:

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. Options granted under the Plexus Corp. 2005 Equity Incentive Plan which qualifies under Rule 16b-3. Options vest one third each year, commencing on the first anniversary of grant.

3. Stock Appreciation Rights granted under the Plexus Corp. 2005 Equity Incentive Plan which qualifies under Rule 16b-3. Rights vest one half each year, commencing on the first anniversary of grant.

4. The Restricted Stock Units vest on November 5, 2010.

5. Each Restricted Stock Unit, granted under the Plexus Corp. 2005 Equity Incentive Plan, represents a contingent right to receive one share of Plexus Corp. Common Stock.

Remarks:

	Megan Matthews, Attorney-in-Fact	02/21/2008
	** Signature of Reporting Person	Date
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 5 (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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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