SCHEDULE 14A
(RULE 14A-101)
INFORMATION REQUIRED IN PROXY STATEMENT
SCHEDULE 14A INFORMATION
PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE
SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. )

Filed by the registrant [X]

Filed by a party other than the registrant [ ]

Check the appropriate box:

[ ] Preliminary proxy statement [ ] Confidential, for Use of the
Commission Only (as permitted by
Rule 14a-6(e)(2))

[X] Definitive proxy statement

[ ] Definitive additional materials

[ ] Soliciting material pursuant to 14a-11(c) or Rule 14a-12

Plexus Corp.
- --------------------------------------------------------------------------------
(Name of Registrant as Specified in Its Charter)

- --------------------------------------------------------------------------------
(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of filing fee (Check the appropriate box):

[X] No fee required.

[ ] Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11.

(1) Title of each class of securities to which transaction applies:

-----------------------------------------------------------------------

(2) Aggregate number of securities to which transaction applies:

-----------------------------------------------------------------------

(3) Per unit price or other underlying value of transaction computed
pursuant to Exchange Act Rule 0-11 (set forth the amount on which the
filing fee is calculated and state how it was determined):

-----------------------------------------------------------------------

(4) Proposed maximum aggregate value of transaction:

-----------------------------------------------------------------------

(5) Total fee paid:

-----------------------------------------------------------------------

[ ] Fee paid previously with preliminary materials.

[ ] Check box if any part of the fee is offset as provided by Exchange Act
Rule 0-11(a)(2) and identify the filing for which the offsetting fee was
paid previously. Identify the previous filing by registration statement
number, or the form or schedule and the date of its filing.

(1) Amount previously paid:

-----------------------------------------------------------------------

(2) Form, schedule or registration statement no.:

-----------------------------------------------------------------------

(3) Filing party:

-----------------------------------------------------------------------

(4) Date filed:

-----------------------------------------------------------------------

2
PLEXUS CORP.
55 JEWELERS PARK DRIVE
P.O. BOX 156
NEENAH, WISCONSIN 54957-0156

NOTICE OF ANNUAL MEETING
OF SHAREHOLDERS
ON MARCH 1, 2000

To the Shareholders of Plexus Corp.:

Plexus Corp. will hold the annual meeting of its shareholders at the
Park Plaza Valley Inn, located at 123 East Wisconsin Avenue, Neenah, Wisconsin,
on Wednesday, March 1, 2000 at 10:00 a.m., for the following purposes:

(1) To elect eight directors to serve until the next annual
meeting and until their successors have been duly elected.

(2) To consider and approve the Plexus Corp. 2000 Employee Stock
Purchase Plan.

(3) To transact such other business as may properly come before
the meeting or any adjournment thereof.

Plexus' shareholders of record on its books at the close of business on
January 3, 2000 will be entitled to vote at the meeting or any adjournment of
the meeting.

We call your attention to the Proxy Statement accompanying this notice
for a more complete statement about the matters to be acted upon at the meeting.

By Order of the Board of Directors

Joseph D. Kaufman
Secretary

Neenah, Wisconsin
January 17, 2000

PLEASE INDICATE YOUR VOTING DIRECTIONS, SIGN AND DATE THE ENCLOSED PROXY AND
RETURN IT PROMPTLY IN THE ENCLOSED ENVELOPE. IF YOU LATER FIND THAT YOU WILL BE
PRESENT AT THE MEETING OR FOR ANY OTHER REASON DESIRE TO REVOKE YOUR PROXY, YOU
MAY DO SO AT ANY TIME BEFORE IT IS VOTED.

PROXY STATEMENT

PLEXUS CORP.
55 JEWELERS PARK DRIVE
P.O. BOX 156
NEENAH, WISCONSIN 54957-0156

* * * * * * *

SOLICITATION AND VOTING

The Board of Directors of Plexus Corp. is soliciting proxies for the
annual meeting of shareholders on Wednesday, March 1, 2000 and is furnishing
this Proxy Statement in connection with that solicitation. Shares which are
represented by properly executed proxies received by Plexus will be voted at the
meeting and any adjournment thereof in accordance with the terms of such
proxies, unless revoked. Proxies may be revoked at any time prior to the voting
thereof either by written notice filed with the secretary or acting secretary of
the meeting or by oral notice to the presiding officer during the meeting.

Shareholders of record at the close of business on January 3, 2000 will
be entitled to one vote on each matter presented for each share so held. At that
date there were 17,638,064 shares of Plexus common stock outstanding. Any
shareholder entitled to vote may vote either in person or by duly authorized
proxy. Representation of a majority of the outstanding shares will constitute a
quorum at the meeting. Abstentions and shares which are the subject of broker
non-votes will be counted for the purpose of determining whether a quorum exists
at the meeting. Shares represented at a meeting for any purpose are counted in
the quorum for all matters to be considered at the meeting. The voted proxies
will be tabulated by the persons appointed as inspectors of election.

Directors are elected by a plurality of the votes cast by the holders
of Plexus common stock entitled to vote at the election at a meeting at which a
quorum is present. "Plurality" means that the individuals who receive the
highest number of votes are elected as directors, up to the number of directors
to be chosen at the meeting. Any votes attempted to be cast "Against" a
candidate are not given legal effect and are not counted as votes cast in the
election of directors. Therefore, any shares which are not voted, whether by
withheld authority, broker non-vote or otherwise, have no effect in the election
of directors except to the extent that the failure to vote for any individual
results in another individual receiving a relatively larger number of votes.

Assuming a quorum is present, the proposed Plexus 2000 Employee Stock
Purchase Plan will be approved if the holders of a majority of shares of Plexus'
common stock represented and entitled to vote on the matter vote "For" the 2000
Purchase Plan. Any shares which are the subject of broker non-votes are not
deemed to be entitled to vote on the 2000 Purchase Plan; therefore, those shares
will have no effect on the 2000 Purchase Plan except as they affect the number
of shares voting.

Shareholders who own shares as part of Plexus' Employee Stock Savings
Plan will receive a separate proxy for the purpose of voting their shares held
in their account. Shares held by the Savings Plan for which designations are not
received will be voted by the Savings Plan's trustee at its discretion, as
provided in the Savings Plan.

Plexus will pay the expenses in connection with the solicitation of
proxies. Upon request, Plexus will reimburse brokers, dealers, banks and voting
trustees, or their nominees, for reasonable expenses incurred in forwarding
copies of the proxy material and annual report to the beneficial owners of
shares which such persons hold of record. Solicitation of proxies will be
principally by mail. Proxies may also be solicited in person, or by telephone,
telegraph or fax, by officers and regular employees of Plexus who will not be
separately compensated for those services.

This proxy material is being mailed to Plexus shareholders commencing
on or about January 17, 2000.

SECURITY OWNERSHIP OF CERTAIN BENEFICIAL
OWNERS AND MANAGEMENT

The following table sets forth certain information regarding the
beneficial ownership of the Plexus common stock by each director, each nominee
as director, each executive officer appearing in the Summary Compensation Table,
the only person known to Plexus to be the beneficial owner of 5% or more of its
common stock, and all directors and executive officers as a group as of January
3, 2000.

SHARES PERCENTAGE
BENEFICIALLY OF SHARES
NAME OWNED (1) OUTSTANDING
---- ------------ -----------

David J. Drury 2,500 *
Dean A. Foate 59,871 *
Harold R. Miller 201,428 1.1%
John L. Nussbaum (2) 188,717 1.1%
Gerald A. Pitner 227,542 1.3%
Thomas J. Prosser 57,800 *
Agustin A. Ramirez 2,500 *
Peter Strandwitz 512,047 2.9%
Jan K. Ver Hagen 2,000 *

J. Robert Kronser 17,586 *
Thomas B. Sabol (2) 45,723 *
All executive officers and directors
as a group (13 persons) 1,396,505 7.7%

- -------------------------

* Less than 1%
(1) The specified persons have sole voting and sole dispositive powers as
to all such shares, except as otherwise indicated. The above amounts
include shares subject to options granted under Plexus' 1998 Stock
Option Plan and the 1995 Directors' Stock Option Plan which are
exercisable within 60 days. These options include those held by Mr.
Drury (1,500), Mr. Foate (48,500), Mr. Nussbaum (49,999), Mr. Pitner
(22,000), Mr. Strandwitz (285,666), Messrs. Miller and Prosser (12,000
each), Mr. Kronser (17,501), Mr. Sabol (38,166), and all officers and
directors as a group (553,598).
(2) Mr. Nussbaum and Mr. Sabol share voting and dispositive power with
their spouses with respect to 143,254 and 3,450 shares, respectively.

SECTION 16(a) BENEFICIAL OWNERSHIP REPORTING COMPLIANCE

Section 16(a) of the Securities Exchange Act of 1934 requires Plexus'
officers and directors, and persons who beneficially own more than 10% of
Plexus' common stock, to file reports of ownership and changes in ownership with
the Securities and Exchange Commission. These "insiders" are required by SEC
regulation to furnish Plexus with copies of all Section 16(a) forms they file.

All publicly held companies are required to disclose the names of any
insiders who fail to make any such filing on a timely basis within the preceding
two years, and the number of delinquent filings and transactions, based solely
on a review of the copies of the Section 16(a) forms furnished to Plexus, or
written representations that no such forms were required. On the basis of
filings and representations received by Plexus, Plexus believes that, during
fiscal 1999 and 1998, Plexus' insiders have complied with all Section 16(a)
filing requirements applicable to them.

-2-

ELECTION OF DIRECTORS

In accordance with Plexus' Bylaws, the Board of Directors has
determined that there shall be eight directors elected at the annual meeting of
shareholders to serve until their successors are duly elected and qualified.
Gerald A. Pitner, one of the founding directors and officers of Plexus, is
retiring from the Board after 20 years of service to Plexus and its
shareholders. The Board wishes to thank Mr. Pitner for his many years of
service.

The persons who are nominated as directors and for whom proxies will be
voted are named below, unless a shareholder specified otherwise. If any of the
nominees should decline or be unable to act as a director, which eventuality is
not foreseen, the proxies will be voted with discretionary authority for a
substitute nominee designated by the Board of Directors.

PRINCIPAL OCCUPATION DIRECTOR
NAME AND AGE AND BUSINESS EXPERIENCE (1) SINCE
------------ --------------------------- --------

David J. Drury, 51 (2)(3)(4) President of Poblocki & Sons LLC (exterior and interior sign 1998
systems) since 1999; previously Independent Consultant from
1997 to 1999, and President of Stolper-Fabralloy Co. LLC
(engine component manufacturer) prior thereto

Dean A. Foate, 41 Executive Vice President of Plexus since 1999 and President of -
Plexus Technology Group, Inc. since 1995; previously,
employed by Plexus in various engineering capacities

Harold R. Miller, 71 (3)(4) Retired; previously Chairman of the Board and Chief Executive 1980
Officer of Marathon Engineers/Architects/Planners, Inc.
(architectural and engineering services)

John L. Nussbaum, 57 President, Chief Operating Officer and Director of Plexus 1980

Thomas J. Prosser, 63 (3)(4)(5) Chairman and CEO of Menasha Corporation (manufacturer of paper 1987
and plastic products) since 1999; previously, Senior Vice
President-Investment Banking of Robert W. Baird & Co., Incorporated
(brokerage and financial services)

Agustin A. Ramirez, 53 President, Chairman and CEO of HUSCO International, Inc. -
(manufacturer of hydraulic and electrohydraulic controls)

Peter Strandwitz, 62 Chairman of the Board, Chief Executive Officer and Director of 1979
Plexus

Jan K. Ver Hagen, 62 (4)(6) Senior Vice President of Corporate Projects of Emerson Electric 1999
Co. since January 1999; also, director, and non-executive
Chairman, of Wolverine Tube, Inc. (manufacturing);
previously, Vice Chairman of United Dominion Industries
(manufacturing) in 1998, and other executive officer positions
in prior years

- ------------------
(1) Unless otherwise noted, all directors have been employed in their
principal occupation listed above for the past five years or more.

-3-

(2) Also director of Jason Incorporated (diversified manufacturing) and St.
Francis Capital Corp. (savings bank holding company).

(3) Member of the Compensation Committee, which held one meeting during
fiscal 1999. The Compensation Committee considers and makes
recommendations to the Board of Directors with respect to officers'
salaries and bonuses, reviews, approves and administers compensation
plans, and awards stock options.

(4) Member of the Audit Committee, which met two times in fiscal 1999. The
Audit Committee selects outside auditors, monitors their activities and
reviews their final reports.

(5) Mr. Prosser coordinates the identification and recommendation of
candidates for Board membership. If shareholders wish to propose
candidates for consideration, they should forward relevant information
in writing to Plexus in care of Joseph D. Kaufman, corporate Secretary.

(6) Also a director of United Dominion Industries.

The Board of Directors held five meetings during fiscal 1999. Each
Director attended at least 75% of the total of the number of meetings of the
Board and the number of meetings of all committees of the Board on which such
director served during the year, during the period in which the person was a
director.

Directors' Compensation

Each Plexus director who is not a Plexus officer or employee receives
an annual directors' fee of $10,000 and an additional $1,000 fee for each board
meeting and $500 for each committee meeting which the director attends.

In addition, each director who is not a Plexus officer or employee is
entitled in each fiscal year to receive an option for 1,500 shares of common
stock, at its market value on the date of grant, under the Directors' Option
Plan. The Directors' Option Plan was approved by Plexus shareholders in 1995.
Options thereunder are fully vested upon grant, may be exercised after a minimum
six month holding period, and must be exercised prior to the earlier of ten
years after grant or one year after the person ceases to be a director. In
accordance with the Directors' Option Plan, each of the then-serving
non-employees directors received a fiscal 1999 option for 1,500 shares
exercisable at $29.625 per share on December 1, 1998 and a fiscal 2000 option
for 1,500 shares exercisable at $38.9532 per share on December 1, 1999.

See "Executive Compensation - Special Retirement Arrangements" for
certain supplemental retirement arrangements for Messrs. Strandwitz, Nussbaum
and Pitner.

-4-

EXECUTIVE COMPENSATION

SUMMARY COMPENSATION TABLE

The following table sets forth information concerning the total
compensation of Plexus' Chief Executive Officer and its four other highest
compensated executive officers, for fiscal 1999 and the preceding two fiscal
years.

Long Term
Compensation
Annual Compensation (1) Awards
------------------------------------------------ -------------
Other Securities
Annual Underlying All Other
Name and Fiscal Compen- Options/ Compen-
Principal Position Year Salary ($) Bonus ($) sation($) SARs #(2) sation ($)(3)
------------------ ------ ---------- --------- --------- ---------- -------------

Peter Strandwitz, 1999 $270,427 $ 57,608 -0- 20,000 $195,330
Chairman and CEO 1998 $240,348 $ 17,600 -0- 25,000 $194,023
1997 $218,869 $165,000 -0- 44,000 $195,183

John L. Nussbaum, 1999 $249,074 $ 52,805 -0- 20,000 $ 94,287
President and COO 1998 $214,400 $ 16,000 -0- 20,000 $ 94,046
1997 $186,093 $150,000 -0- 40,000 $ 93,890

Dean A. Foate 1999 $143,908 $ 21,780 -0- 10,000 $ 2,976
Executive Vice President 1998 $115,421 $ 11,600 -0- 10,000 $ 2,550
1997 $101,673 $ 82,500 -0- 15,000 $ 2,539

Thomas B. Sabol 1999 $152,077 $ 31,684 -0- 10,000 $ 2,692
Vice President-Finance 1998 $131,235 $ 14,600 -0- 10,000 $ 3,129
and CFO 1997 $113,625 $ 90,000 -0- 20,000 $ 1,577

J. Robert Kronser 1999 $139,284 $ 21,783 -0- 9,000 $ 3,359
Vice President-Sales and 1998 $115,373 $ 11,600 -0- 7,500 $ 2,755
Marketing 1997 $101,678 $ 82,500 -0- 10,000 $ 2,535

- ---------------------
(1) While the named individuals received perquisites or other personal
benefits in the years shown, in accordance with SEC regulations, the
value of these benefits are not shown since they did not exceed, in the
aggregate, the lesser of $50,000 or 10% of the individual's salary and
bonus in any year.
(2) Represents the number of shares for which options were granted under
Plexus' Option Plan. No SARs have been granted.
(3) Includes: Plexus' contributions to the accounts of Messrs. Strandwitz,
Nussbaum, Foate, Sabol and Kronser in the Savings Plan of $1,730,
$3,366, $2,976, $2,692 and $3,359, respectively, in fiscal 1999; and
Plexus' fiscal 1999 contributions to accounts of Messrs. Strandwitz and
Nussbaum under the supplemental retirement arrangements of $193,600 and
$90,921, respectively.

-5-

STOCK OPTIONS

OPTION/SAR GRANTS IN LAST FISCAL YEAR

The following table sets forth information with respect to the grant of
stock options in fiscal 1999 to the five executive officers named in the Summary
Compensation Table.

Individual Grants(1)
---------------------------------------------------------------
Potential
% of Realized Value at
Number of Total Assumed Annual
Securities Options/ Rates of Stock Price
Underlying SARs Granted Appreciation
Options/ to Employees Exercise or for Option Term (2)
SARs Granted in Fiscal Base Price Expiration ---------------------
Name (#) Year ($/sh) Date 5% 10%
- ---- ------------ ------------ ----------- ---------- -------- --------

Peter Strandwitz 20,000 4.5% $30.25 4/21/09 $380,481 $964,214
John Nussbaum 20,000 4.5% $30.25 4/21/09 $380,481 $964,214
Dean Foate 10,000 2.3% $30.25 4/21/09 $190,241 $482,107
Thomas Sabol 10,000 2.3% $30.25 4/21/09 $190,241 $482,107
Robert Kronser 9,000 2.0% $30.25 4/21/09 $171,217 $433,896

(1) No SARs have been granted; all grants reflect stock options under the Option
Plan.
(2) Assumes the stated appreciation from the date of grant.

AGGREGATED OPTION/SAR EXERCISES IN
LAST FISCAL YEAR AND FISCAL YEAR END OPTION/SAR VALUES

The following table sets forth information with respect to the five
executive officers named in the Summary Compensation Table concerning the number
and value of options outstanding at September 30, 1999.

Number of Value of
Securities Underlying Unexercised In-the-
Unexercised Options/ Money Options/SARs
Shares SARs at FY-End (#)(2) at FY-End ($)(3)
Acquired on Value --------------------- -------------------
Name Exercise (#) Realized($)(1) Exercisable/Unexercisable Exercisable/Unexercisable
- ---- ------------ -------------- ------------------------- -------------------------

Peter Strandwitz - - 285,666 / 51,334 $6,741,993 / $433,376

John Nussbaum 30,000 $1,169,904 49,999 / 26,668 $1,023,381 / $433,376

Dean Foate - - 48,500 / 20,000 $1,084,906 / $142,498

Thomas Sabol - - 38,166 / 23,334 $ 785,693 / $188,756

Robert Kronser - - 17,501 / 19,000 $ 353,304 / $142,123

(1) Represents the difference between the exercise price and the reported
closing price on the date of exercise.
(2) Represents options granted under the Option Plan. No SARs have been granted.
(3) Represents the difference between the exercise price and the $30.625
reported closing price of Plexus common stock on the NASDAQ Stock Market on
September 30, 1999.

-6-

Change in Control Arrangements

The Company has entered into Change in Control Agreements with Messrs.
Strandwitz, Nussbaum, Foate, Sabol and Kronser, and three other executive
officers. Under the terms of these agreements, if there is a change in control
of Plexus, as defined in the agreement, the executive officers' authority,
duties and responsibilities shall remain at least commensurate in all material
respects with those prior to the change in control. Their compensation and
benefits may not be reduced, or location of employment changed, as a result of
the change in control.

In the event that any covered officer is terminated other than for
cause, death or disability, or the employee terminates his employment with good
reason, Plexus is obligated to pay the executive officer, in a cash lump sum, an
amount equal to approximately three times the executive's base salary plus
expected bonus payments, and to continue certain benefits. The agreements
further provide for payment of additional amounts which may be necessary to
"gross up" the amounts due such employee in the event of the imposition of an
excise tax upon the payments. The agreements do not preclude termination of the
officer, or require payment of any benefit, if there has not been a change in
control of Plexus, nor does it limit the ability of Plexus to terminate these
persons for cause.

Special Retirement Arrangements

In 1996, the Compensation Committee established special retirement
arrangements for Messrs. Strandwitz, Nussbaum and Pitner, who were all executive
officers at that time. The Committee believed that those arrangements would both
reward past service and maintain an additional incentive for those officers'
continued performance for Plexus. As a result, Plexus and those persons have
entered into a supplemental retirement agreement designed to provide specified
retirement and death benefits additional to those provided under the 401(k)
Savings Plan. While the arrangement is designed to provide a 15-year annual
payout on retirement at or after age 65 of 60% of final pay, Plexus' commitment
under each agreement is to annually contribute a fixed dollar amount ($193,600
for Mr. Strandwitz, $90,921 for Mr. Nussbaurm and $58,918 for Mr. Pitner) for
each year until age 65 if he remains in Plexus' employ. All three persons remain
Plexus employees.

The contributions are invested in a life insurance policy acquired by
Plexus on the participant's life. On retirement at or after age 65, the
agreement provides for a 15-year annual installment payment stream, with each
payment to be measured by the cash values then held in the policy. Plexus'
contributions would also continue to be made should their employment terminate
after a change in control, attainment of age 55 and completion of 10 years of
service or disability, should the participants terminate for "good reason" as
defined in the agreement, or should Plexus terminate the executive, but not for
"cause" as defined in the agreement. Provided the participants are able to and
does perform such duties as may be provided under a separate consulting
agreement, the 15-year installment payments would commence at age 65. If the
executive voluntarily terminates other than for "good reason" and before
payments under the agreement have started, a 15-year installment payment
arrangement starts at that time, based on the then existing policy cash values.
Lump sum payments based on policy cash values become due if at any time after a
change in control Plexus' consolidated tangible net worth drops below $35
million, or if the ratio of Plexus' consolidated total debt to consolidated
tangible net worth becomes greater than 2.5 to 1.

To the extent that any of the payments constitute excess parachute
payments subjecting the participant to an excise tax, the agreement provides for
an additional payment (the "Gross-Up Payment") to be made by Plexus to the
participant so that after the payment of all taxes imposed on the Gross-Up
Payment, the participant retains an amount of the Gross-Up Payment equal to the
excise tax imposed. If a participant dies while employed or prior to receiving
all of the 15-year installment payments, certain death benefit payments become
due. If the participant is terminated by Plexus for "cause" at any time before
payments start and prior to a change in control, all benefits are forfeited.

-7-

COMPENSATION COMMITTEE REPORT
ON EXECUTIVE COMPENSATION

The Compensation Committee of the Plexus Board of Directors sets
general compensation policies for Plexus. The Committee makes the primary
decisions with respect to compensation of the Chairman/Chief Executive Officer
(the "CEO") and the President/Chief Operating Officer ("President") of Plexus;
compensation decisions as to all other Company officers are recommended by the
CEO and the President, subject to approval by the Committee. Plexus' other
compensation programs, such as the Savings Plan and the Option Plans, are either
originated or approved by the Committee; the Committee grants stock options
under the Option Plans.

Plexus' policy, which the Committee adheres to, is to fairly compensate
individuals for their contributions to Plexus, but also to provide value to
Plexus' shareholders and to consider the ability of Plexus to fund any
compensation decisions, plans or programs. The Committee believes that fair
compensation packages are necessary to attract and retain qualified executive
officers. To be effective in attracting and retaining competent individuals,
compensation packages must balance short-term and long-term considerations, as
well as provide incentives to individuals based upon the performance of Plexus.
For the past several fiscal years, the Committee has evaluated compensation of
Plexus executive officers in the context of continuing growth, but also the
continuing need for capital to support that growth and the occasional effect on
earnings of that growth. The Committee historically had not retained outside
consultants, or relied in a significant fashion upon outside market surveys
specifically commissioned by Plexus. However, in fiscal 1997, Plexus engaged
outside consultants to assist it in evaluating compensation company-wide
(including executive officers), and the Committee reviews published survey
information.

In determining the compensation of the CEO, the Committee reviews
numerous factors, although most of these factors are not subject to
quantification or specific weight. The primary factors reviewed, in no
particular order, are the importance of the individual's contribution to Plexus'
strategic planning and long-term success; special projects and tasks undertaken
by the individual during the preceding year; acquisition-related activities and
efforts; and performance of Plexus' sales and earnings. In addition, the
Committee also reviewed a sampling, which it believed to be representative, of
compensation paid by other companies in Plexus' geographic area, comparable
companies in the electronics manufacturing services industry and numerous
published surveys. This group of companies did not coincide with the more
extensive list of companies in the NASDAQ electronics components sector used in
the following performance graph. Plexus generally has a March/April annual
review cycle for its employees, including key executives. New salaries become
effective at the time of the review.

In establishing the CEO's fiscal 1999 compensation, the Committee noted
his roles as Plexus chief strategic planner and his general executive duties.
The Committee also reviewed salaries paid to CEO's in other companies in the
geographic area and the industry. The compensation for fiscal 1999 was
determined in part in the April 1998 review, and in part in the April 1999
review. In its April 1998 review, the Committee had available full fiscal 1997
sales and net income information, which indicated full year increases of 22% and
121%, respectively, over fiscal 1996. Also, for the quarter ended December 31,
1997, Plexus' net sales and net income had increased 10% and 31%, respectively,
over the same fiscal 1997 period. Based on these factors, and the Committee's
perception of the CEO's performance from a non-quantitative perspective, the
Committee approved a 9% salary increase for the CEO effective April 1998. In its
April 1999 review, the Committee had available full fiscal 1998 sales and net
income information, which indicated full-year increases of 3% and 17%,
respectively, over fiscal 1997. For the quarter ended December 31, 1998, Plexus'
net sales and net income increased 6% and 42%, respectively, over the same
fiscal 1998 period. Based on both quantitative and non-quantitative factors,
including his efforts in connection with fiscal 1999 acquisitions, the Committee
approved a 25% salary increase for the CEO effective April 1999. In both cases,
the Committee also considered the payments made on the CEO's behalf pursuant to
the special retirement benefits established in 1996.

The Committee determined it would be in Plexus' best interests to
provide its executive officers with a tangible performance-based incentive
beyond that contained in the Option Plan. Such a bonus arrangement would further
motivate officers to continue the improved performance, and provide specific
non-market criteria to evaluate

-8-

performance. Effective since fiscal 1998, bonuses have been determined 40% by
reference to earnings per share, 40% by sales growth, and 20% by individual
performance. The possible ranges of bonus, if targets are met, are from 10% to
80% of base salary for executive officers, which amounts are chosen in advance
by the Committee and may vary from person to person, and year to year.

For fiscal 1999, for the target bonus to be earned, Plexus was required
to increase pre-bonus earnings per share to $1.66 per share (approximately a 36%
increase over fiscal 1998) and corporate sales growth over fiscal 1998 equal to
at least 17%. (All targets and results which are presented exclude the
pre-merger effects of the SeaMED merger and pooling restatement.) If these were
met, the CEO would earn a bonus of 40% of his salary; for results above or below
target, bonus (if any) would vary between 0% and 80%. The Committee believed
that both targets were very aggressive. In fact, Plexus achieved pre-bonus
fully-diluted earnings per share of approximately $1.60 (approximately a 31%
increase over fiscal 1998) and sales growth of approximately 12%. Because the
target numerical goals were not fully achieved in fiscal 1999, the Committee
awarded reduced bonuses. Therefore, the CEO earned a bonus of 24% of salary,
which equaled 60% of the maximum bonus which could be earned based on the 40%
target bonus adopted for fiscal 1999.

The Committee believes that the Option Plan provides participants with
a long-term incentive to increase the overall value of Plexus by providing them
with a stake in the increasing value of its common stock on a long-term basis.
Consistent with this approach, the Committee granted to the CEO options for
20,000 shares during fiscal 1999. Previously, the Committee granted the CEO
options for 25,000 shares in fiscal 1998 and 44,000 shares in fiscal 1997. The
1999 award level reflects the Committee's determination to grant the CEO a
slightly decreased number of options in view of the size of the increase in his
cash compensation. The comparison between fiscal 1997 and later years is
affected by Plexus' two-for-one stock split in August 1997.

The Committee also believes that the Savings Plan provides an
additional stock-based incentive. Although employees, including the CEO, may
choose from a variety of investment funds for their contributions under the
Savings Plan, company matching contributions on behalf of participants are made
to Plexus Stock Fund of the Savings Plan, having the effect of increasing the
participants' stock ownership. The Committee further believed that a
supplemental retirement arrangement with the CEO was appropriate, and therefore
entered into the Supplemental Retirement Agreement with the CEO described above
under "Executive Compensation - Special Retirement Arrangements."

The factors used to determine other executive officers' compensation
are essentially the same as those used for the CEO. As with the CEO, Messrs.
Nussbaum, Foate, Sabol and Kronser, and other executive officers, were
considered for salary increases effective in April 1998 and April 1999.
Increases in executive officers' salaries (other than the CEO) in April 1998
varied from 0% to 11% and in April 1999 varied from 5% to 40%. (The largest
increase also reflects a promotion and significant increase in
responsibilities.) The increases varied depending upon the Committee's view of
the adequacy of the particular officers' compensation compared to that officer's
performance and duties, especially when those duties significantly changed since
the last salary increase, and expected changes in circumstances in the coming
year. For fiscal 1999, all eligible executive officers received a bonus under
the Bonus Plan equaling from 18% to 24% of base salary, depending upon
individual performance. The Committee also approved stock option awards during
fiscal 1999 for most of the other executive officers of Plexus, which awards
varied from 4,000 to 20,000 shares. The number of shares subject to options
granted to executive officers was generally the same or greater than the number
granted upon ordinary grants in the preceding fiscal year, with appropriate
changes to reflect the Committee's perception of individual circumstances.
Plexus has also entered into a supplemental retirement agreement with Mr.
Nussbaum, as described above.

-9-

The Committee believes that it is highly unlikely that the compensation
of any executive officer, including the CEO, will exceed $1 million in any
fiscal year. Therefore, except with respect to the Option Plan, it has not taken
any action with respect to the provisions of Section 162 of the Internal Revenue
Code which limits the deductibility of compensation to certain executive
officers of over $1 million in any fiscal year. Because of the shareholders'
approval of the Option Plan, and assuming approval of the 2000 Purchase Plan,
the Committee believes that any compensation income under them would not be
subject to the Internal Revenue Code's deduction limitation.

Members of the Compensation Committee: David J. Drury, Chair
Harold R. Miller
Thomas J. Prosser

COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION

No Plexus insiders are members of the Compensation Committee. None of
the directors who are Committee members are employees of Plexus, have ever been
employed by Plexus or any of its subsidiaries, and have other reportable
relationships with Plexus.

PERFORMANCE GRAPH

The following graph compares the cumulative total return on Plexus
common stock with the NASDAQ Stock Market Index for U.S. Companies and the
NASDAQ Stock Market Index for Electronics Components Companies, both of which
include Plexus. The values on the graph show the relative performance of an
investment of $100 made on September 30, 1994, in Plexus common stock and in
each of the indices.

COMPARISON OF CUMULATIVE TOTAL RETURN

[GRAPH]

- ----------------------------------------------------------------------------------------------------------------------------
1994 1995 1996 1997 1998 1999
- ----------------------------------------------------------------------------------------------------------------------------

PLEXUS 100 156 138 661 365 576
- ----------------------------------------------------------------------------------------------------------------------------
NASDAQ 100 138 164 225 229 372
- ----------------------------------------------------------------------------------------------------------------------------
NASDAQ/Electronics 100 199 237 417 332 683
- ----------------------------------------------------------------------------------------------------------------------------

-10-

APPROVAL OF 2000 EMPLOYEE STOCK PURCHASE PLAN

Plexus shareholders are being asked to approve the Plexus Corp. 2000
Employee Stock Purchase Plan. The Board of Directors approved the 2000 Purchase
Plan on November 10, 1999, subject to shareholder approval. A copy of the 2000
Purchase Plan is attached as Exhibit A. Descriptions in this Proxy Statement of
provisions of the 2000 Purchase Plan are qualified in their entirety by
reference to the complete text of the 2000 Purchase Plan.

THE BOARD OF DIRECTORS UNANIMOUSLY RECOMMENDS THAT PLEXUS SHAREHOLDERS
VOTE FOR APPROVAL OF THE 2000 PURCHASE PLAN.

GENERAL

The purpose of the 2000 Purchase Plan is to provide Plexus employees
with a convenient and attractive opportunity to acquire shares of Plexus common
stock, or increase their Plexus stock ownership. The Board believes that
increased ownership gives employees an incentive specifically linked to the
performance of the common stock, helping them become further identified with
shareholders of Plexus. The 2000 Purchase Plan is intended to supplement the
incentives which are provided under Plexus' stock option plan, and extend those
incentives to all employees. It is Plexus' intention to have the 2000 Purchase
Plan qualify as an "employee stock purchase plan" under Section 423 of the
Internal Revenue Code.

Most employees of Plexus and its subsidiaries are eligible to
participate in the 2000 Purchase Plan. An employee is eligible to participate in
the 2000 Purchase Plan if he or she is employed as of the commencement date of
an offering, except for certain part-time personnel, temporary employees,
independent contractors and persons employed for 90 or fewer days. Non-employee
directors will not participate in the 2000 Purchase Plan. Plexus currently
estimates that the number of employees eligible to participate in the 2000
Purchase Plan is approximately 3,000.

Plexus does not currently have any employee benefit plans which are
substantially similar to the 2000 Purchase Plan. Plexus does maintain an
employee stock option plan under which officers and key employees may be granted
options to purchase shares of Plexus common stock. At September 30, 1999,
options for approximately 1.9 million shares were outstanding under the option
plan, and Plexus may grant options for an additional 1.9 million shares. There
were also options for approximately 200,000 shares outstanding under the former
option plan of a company which Plexus acquired during fiscal 1999; no additional
options may be granted under that plan. Because the level of benefits under the
2000 Purchase Plan will depend upon an individual's election and may be reduced
as a result of the extent of participation by others, the benefits which could
be received by executive officers or any other individuals under the 2000
Purchase Plan cannot be determined at this time.

The 2000 Purchase Plan will be administered by the Board which may
delegate its role to a committee, as it may determine. The Board therefore may
delegate to the Compensation Committee, composed of not less than three members
of the Board of Directors. It is intended that members of the Committee will
meet the requirements for "disinterested persons" as defined by Rule 16b-3 under
the Securities Exchange Act of 1934. With respect to any employee subject to
Section 16(b) of the Securities Exchange Act, the Committee may impose such
conditions on the grant or exercise of any rights hereunder necessary to satisfy
the requirements of such statute or applicable regulations. The Board or the
Committee may engage a qualified brokerage firm to assist in the administration
of the 2000 Purchase Plan.

The aggregate number of shares of Plexus common stock which may be
issued pursuant to the 2000 Purchase Plan is 1,000,000. In the event of a stock
dividend, stock split, merger, reorganization, or other similar change affecting
the common stock, the Board will adjust the number of shares which may
thereafter be issued under the 2000 Purchase Plan, and the number of shares, and
the price therefor, under outstanding rights.

-11-

The 2000 Purchase Plan is effective July 1, 2000, subject to
shareholder approval, and will terminate on June 30, 2005, unless all shares
authorized under the 2000 Purchase Plan have been purchased prior to that date.
On that date, the 2000 Purchase Plan will expire, except as to rights then
outstanding, which will remain in effect until they have been exercised or
expired or otherwise terminated. The 2000 Purchase Plan may be terminated at any
time by the Board of Directors. The Board of Directors may amend the 2000
Purchase Plan from time to time, but shareholder approval is required in certain
circumstances.

PURCHASE OF SECURITIES UNDER THE 2000 PURCHASE PLAN

There will be ten offerings of six months each pursuant to the 2000
Purchase Plan. The first offering will commence on July 1, 2000 and end on
December 31, 2000. Thereafter, offerings will commence on each subsequent
January 1 and July 1 and the final offering under this Purchase Plan shall
commence on January 1, 2005 and terminate on June 30, 2005. The final offering
would be earlier if all available shares are purchased in earlier offerings. In
order to become eligible to purchase shares, an employee must sign an enrollment
agreement, and any other necessary papers on or before the commencement date of
the particular offering in which the employee wishes to participate.
Participation in one offering under the 2000 Purchase Plan neither limits, nor
requires, participation in any other offering.

At the time a participant authorizes a payroll deduction, the
participant shall elect to have deductions made from his or her compensation on
each payday during the time the participant is a participant in an offering, at
a percentage of the participant's base pay as set from time to time. However,
the percentage may not exceed 10%. An employee may pay for shares to be
purchased pursuant to the Purchase Plan only with money that has been deducted
from the employee's paycheck pursuant to a payroll deduction authorization.
Funds so deducted constitute that employee's "account," and while the funds
allocated to an employee's account shall remain the property of the employee at
all times, they may be commingled with Plexus' general funds.

On each offering date, the 2000 Purchase Plan shall be deemed to have
granted to the participant an option for as many full shares as he or she will
be able to purchase with the payroll deductions credited to his account during
participation in that offering. If the total number of shares for which options
are to be granted on any date exceeds the number of shares then available under
the Purchase Plan, then Plexus shall allocate the shares pro rata to
participating employees. Payroll deductions will be reduced accordingly, and
participating employees will be notified in writing of such reduction.

The purchase price per share will be 85% of the lesser of the fair
market value of the shares of Plexus common stock on the offering date or on the
last business day of the offering. Fair market value means the mean between the
highest and lowest sales price on that day reported on the Nasdaq Stock Market.
If the Plexus common stock is traded on a stock exchange, the prices shall be as
reported on such exchange. Shares of common stock are to be purchased from
Plexus and no additional fees, commissions or other charges will be incurred by
the employee. The closing sale price of Plexus common stock on January 3, 2000,
as reported on the NASDAQ Stock Market, was $43.25.

Each employee who continues to be a participant in an offering on the
last business day of that offering shall be deemed to have exercised the
employee's option on that date and shall be deemed to have purchased from Plexus
the number of full shares as the employee's accumulated deductions will pay for
at the option price. At the termination of each offering Plexus will
automatically re-enroll a participating employee in the next offering, and any
balance in the employee's account will be used in the new offering, unless the
employee has advised Plexus otherwise. No interest will be paid or allowed on
any money in the participant's account.

No employee shall be permitted to subscribe for any shares under the
2000 Purchase Plan if the employee, immediately after such subscription, owns
shares that account for 5% or more of the total combined voting power of Plexus
or of its subsidiaries. In addition, each employee's purchases under the 2000
Purchase Plan in any calendar year are limited to shares having an aggregate
fair market value of $25,000.

-12-

An employee may withdraw from an offering at any time prior to the last
business day of that offering by delivering a notice to Plexus. In that event,
Plexus will refund the entire balance of the employee's account. Upon
termination of employment for any reason whatsoever, including death or
retirement, the balance in each employee's account shall be paid to the employee
or such employee's estate. An employee who has withdrawn from an offering may
not participate again in the offering from which the employee withdrew; however,
the employee may participate in subsequent offerings.

No employee will be permitted to sell or transfer or pledge either the
payroll deductions credited to the employee's account or any rights with regard
to the exercise of an option or to receive shares under the 2000 Purchase Plan,
other than by will or the laws of descent and distribution. Any attempted sale,
transfer or pledge by an employee will be treated as a withdrawal from the
offering.

TAX CONSEQUENCES

The 2000 Purchase Plan is not a "qualified plan" under Section 401(a)
of the Internal Revenue Code. The 2000 Purchase Plan is intended to qualify as
an "employee stock purchase plan" under Section 423 of the Code. The tax
consequences to employees and to Plexus of the 2000 Purchase Plan are discussed
below.

In order to qualify for favorable tax treatment an employee eligible
under the 2000 Purchase Plan must, at all times during the period beginning with
the date of grant and ending three months before the option is exercised, be an
employee of Plexus or its subsidiaries. If the employment condition is met, no
tax liability results on the grant or exercise of an option under the Purchase
Plan. The employee becomes liable for the tax on disposition of the stock.

The required holding period for favorable tax treatment upon
disposition of the stock is the later of two years after the option is granted,
or one year after the stock is acquired. When stock is disposed of after this
period, the employee realizes ordinary income to the extent of the lesser of (1)
the amount by which the fair market value of the stock at the time the option
was granted exceeded the option price (15% of the fair market value) or (2) the
amount by which the fair market value of the stock at the time of disposition
exceeded the option price. Any further gain is taxed at capital gain rates. If
the sale price is less than the option price, there is no ordinary income and
the employee has a long-term capital loss for the difference.

When an employee sells the stock before the expiration of the required
holding period, the employee recognizes ordinary income to the extent of the
difference between the option price and the fair market value of the stock at
the date the option was exercised regardless of the price at which the stock is
sold. Thus, if the stock is sold for a price greater than the fair market value
of the stock at the date the option was exercised, the tax effect is the same as
described in the preceding paragraph. However, if the sale price is less than
the fair market value of the stock at the date of exercise, the employee will
also have a capital loss equal to such difference.

Even though an employee who satisfies the required holding period will
treat part of his or her gain on the disposition of stock as ordinary income,
Plexus may not take a business deduction for such amount. However, where an
employee disposes of stock before the end of the required holding period, the
amount of income which the employee must report as ordinary income qualifies as
a business deduction for Plexus in the year of disposition.

-13-

CERTAIN TRANSACTIONS

The Company provides certain engineering design and development
services for Memorylink Corp., a developer of electronic products. Messrs.
Strandwitz and Pitner are directors and shareholders of Memorylink. Memorylink
was billed $2,264,000 by Plexus in fiscal 1999 for those services; the amounts
billed were determined in accordance with Plexus' standard charges. Memorylink's
account payments were current throughout fiscal 1999, with $473,000 outstanding
at September 30, 1999.

AUDITORS

The Board of Directors intends to reappoint the firm of
PricewaterhouseCoopers LLP as independent auditors to audit the financial
statements of Plexus for fiscal 2000. Representatives of PricewaterhouseCoopers
LLP are expected to be present at the annual meeting of shareholders to respond
to appropriate questions and make a statement if they desire to do so.

SHAREHOLDER PROPOSALS

Shareholder proposals must be received by Plexus no later than
September 20, 2000 in order to be considered for inclusion in next year's annual
meeting proxy statement. In addition, Plexus bylaws provide that any proposal
for action, or nomination to the Board of Directors, proposed other than by the
Board of Directors must be received by Plexus in writing, together with
specified accompanying information, at least 70 days prior to an annual meeting
in order for such action to be considered at the meeting. The year 2001 annual
meeting of shareholders is tentatively scheduled for March 7, 2001, and any
notice of intent to consider other questions and/or nominees, and related
information, must therefore be received by December 29, 2000. The purpose of the
bylaw is to assure adequate notice of, and information regarding, any such
matter as to which shareholder action may be sought.

By Order of the Board of Directors

Joseph D. Kaufman
Secretary

Neenah, Wisconsin
January 17, 2000

A COPY (WITHOUT EXHIBITS) OF PLEXUS' annual report to the Securities
and Exchange Commission on Form 10-K FOR THE FISCAL YEAR ENDED SEPTEMBER 30,
1999, was included in Plexus' 1999 Annual Report to Shareholders, WHICH
ACCOMPANIES THIS PROXY STATEMENT. AN ADDITIONAL COPY WILL BE PROVIDED WITHOUT
CHARGE TO EACH RECORD OR BENEFICIAL OWNER OF SHARES OF PLEXUS' common stock as
of January 3, 2000, on the written request of such person DIRECTED TO: THOMAS B.
SABOL, VICE PRESIDENT-FINANCE AND CFO, PLEXUS CORP., 55 JEWELERS PARK DRIVE,
P.O. BOX 156, NEENAH, WISCONSIN 54957-0156.

-14-

17
EXHIBIT A

PLEXUS CORP.
2000 EMPLOYEE STOCK PURCHASE PLAN

Plexus Corp. (the "Company") establishes its Employee Stock Purchase Plan as
follows:

1. PURPOSE OF THE PLAN; EFFECTIVE DATE. The purpose of this Plan is to
provide eligible employees of the Company who wish to become shareholders in the
Company a convenient method of doing so. It is believed that employee
participation in the ownership of the business will be to the mutual benefit of
both the employees and the Company. It is the intention of the Company to have
the Plan qualify as an "employee stock purchase plan" under Section 423 of the
Internal Revenue Code of 1986, as amended (the "Code"). The provisions of the
Plan shall, accordingly, be construed so as to extend and limit participation in
a manner consistent with the requirements of that section of the Code. This Plan
shall become effective July 1, 2000, subject to approval by the shareholders of
the Company.

2. DEFINITIONS.

2.1 "Compensation" means gross cash compensation, including wages,
bonuses, overtime payments, payments for incentive compensation, and other
special payments except to the extent that any such item is specifically
excluded by the Board of Directors of the Company (the "Board") or a committee
appointed by the Board.

2.2 "Account" shall mean the funds accumulated with respect to an
individual employee as a result of deductions from his or her paycheck for the
purpose of purchasing stock under this Plan. The funds allocated to an
employee's account shall remain the property of the respective employee at all
times but may be commingled with the general funds of the Company.

2.3 "Shares" means the issued or unissued shares of the common stock,
$.01 par value, of the Company.

2.4 "Fair Market Value" means the mean between the highest and lowest
sale prices on such date for sales made and reported through the National Market
System of the National Association of Securities Dealers or such national stock
exchange on which such stock may then be listed and which constitutes the
principal market for such stock, or, if no sales of stock shall have been
reported with respect to that date, on the next preceding date with respect to
which sales were reported.

3. EMPLOYEES ELIGIBLE TO PARTICIPATE. An employee of the Company or any
of its subsidiaries who is in the employ of the Company on one or more offering
dates is eligible to participate in the Plan, provided that the employee has
been employed by the Company for 90 days as of the commencement date of an
offering, except: (a) employees whose customary employment is less than 20 hours
per week; (b) employees whose customary employment is for not more than five
months in any calendar year; and (c) independent contractors, individuals
employed through contract employment agencies or companies, interns, or any
other temporary type worker. With respect to any employee subject to Section
16(b) of the Securities Exchange Act of 1934, as amended, the Company may impose
such conditions on the grant or exercise of any rights hereunder necessary to
satisfy the requirements of such statute or applicable regulations.

A-1

4. OFFERINGS. Generally, there will be ten separate consecutive
six-month offerings pursuant to the Plan. The first offering shall commence on
July 1, 2000 and extend through December 31, 2000. Thereafter, offerings shall
commence on each subsequent January 1 and July 1, and the final offering under
this Plan shall commence on January 1, 2005 and terminate on June 30, 2005. In
order to become eligible to purchase shares, an employee must sign an Enrollment
Agreement, and any other necessary papers on or before the commencement date of
the particular offering in which he wishes to participate. Participation in one
offering under the Plan shall neither limit, nor require, participation in any
other offering.

5. PRICE. The purchase price per share shall be the lesser of (1) 85%
of the Fair Market Value of the stock on the offering date; or (2) 85% of the
Fair Market Value of the stock on the last business day of the offering.

6. OFFERING DATE. The "offering date" as used in this Plan shall be the
commencement date of the offering, if such date is a regular business day, or
the first regular business day following such commencement date. A different
date may be set by the Board or a committee appointed by the Board.

7. NUMBER OF SHARES TO BE OFFERED. Subject to adjustment as provided
herein, the number of Shares that may be issued under the Plan shall not exceed
1,000,000 Shares (as such number may be adjusted by any stock split, dividend or
similar change in the Company's capital stock approved by the Board of
Directors). The shares to be sold to participants under the Plan will be common
stock of the Company. If the total number of shares for which options are to be
granted on any date in accordance with Section 10 exceeds the number of Shares
then available under the Plan (after deduction of all Shares for which options
have been exercised or are then outstanding), the Company shall make a pro rata
allocation of the Shares remaining available in as nearly a uniform manner as
shall be practicable and as it shall determine to be equitable. In such event,
the payroll deductions to be made pursuant to the authorizations therefor shall
be reduced accordingly and the Company shall give written notice of such
reduction to each employee affected thereby.

8. PARTICIPATION.

8.1 An eligible employee may become a participant by completing an
Enrollment Agreement provided by the Company and filing it with the Human
Resources Department prior to the commencement of the offering to which it
relates.

8.2 Payroll deductions for a participant shall commence on the offering
date, and shall end on the termination date of such offering unless earlier
terminated by the employee as provided in Paragraph 14.

9. PAYROLL DEDUCTIONS.

9.1 At the time a participant files his authorization for a payroll
deduction, he shall elect to have deductions made from his pay on each payday
during the time he is a participant in an offering at a percentage of his
Compensation as may be from time to time set by the Board or a committee
appointed by the Board; provided such percentage shall not exceed 10%.

A-2

9.2 All payroll deductions made for a participant shall be credited to
his account under the Plan. A participant may not make any separate cash payment
into such account nor may payment for Shares be made other than by payroll
deduction.

9.3 A participant may discontinue his participation in the Plan and
receive the entire balance of his deductions as provided in Section 14, but no
other change can be made during an offering and, specifically, a participant may
not alter the rate of his payroll deductions for that offering.

10. GRANTING OF OPTION. On the offering date, this Plan shall be deemed
to have granted to the participant an option for as many full and/or fractional
shares as he will be able to purchase with the payroll deductions credited to
his account during his participation in that offering. Notwithstanding the
foregoing, no participant may purchase stock the fair market value of which
exceeds $25,000 during any calendar year.

11. EXERCISE OF OPTION. Each employee who continues to be a participant
in an offering on the last business day of that offering shall be deemed to have
exercised his option on such date and shall be deemed to have purchased from the
Company such number of full and/or fractional shares of common stock reserved
for the purpose of the Plan as his accumulated payroll deductions on such date
will pay for at the option price.

12. EMPLOYEE'S RIGHTS. No participating employee shall have any right
as a shareholder with respect to any shares until the shares have been purchased
in accordance with Section 11 above and the stock has been issued by the
Company. Neither the adoption of this Plan nor the granting of rights pursuant
to it shall be deemed to create any right in any employee to be retained or
continued in the employment of the Company or any subsidiary.

13. EVIDENCE OF STOCK OWNERSHIP.

13.1 Promptly following the end of each offering, the number of shares
of common stock purchased by each participant shall be deposited into an account
established in the participant's name at a stock brokerage or other financial
services firm designated by the Company (the "ESPP Broker").

13.2 The participant may direct, by written notice to the Company at
the time of his enrollment in the Plan, that his ESPP Broker account be
established in the names of the participant and one other person designated by
the participant, as joint tenants with right of survivorship, tenants in common,
or community property, to the extent and in the manner permitted by applicable
law.

13.3 A participant shall be free to undertake a disposition (as that
term is defined in Section 424(c) of the US Internal Revenue Code of 1986, as
amended (the "Code")) of the shares in his account at any time, whether by sale,
exchange, gift, or other transfer of legal title, but in the absence of such a
disposition of the shares, the shares must remain in the participant's account
at the ESPP Broker until the holding period set forth in Section 423(a) of the
Code has been satisfied. With respect to shares for which the Section 423(a)
holding period has been satisfied, the participant may move those shares to
another brokerage account of participant's choosing or request that as stock
certificate be issued and delivered to him.

A-3

13.4 A participant who is not subject to payment of U.S. income taxes
may move his shares to another brokerage account of his choosing or request that
a stock certificate be issued and delivered to him at any time, without regard
to the satisfaction of the Section 423(a) holding period.

14. WITHDRAWAL.

14.1 An employee may withdraw from an offering, in whole but not in
part, at any time prior to the last business day of such offering by delivering
a Withdrawal Notice to the Company, in which event the Company will refund the
entire balance of his deductions as soon as practicable thereafter.

14.2 To re-enter the Plan, an employee who has previously withdrawn
must file a new Enrollment Agreement in accordance with Section 8.1. The
employee's re-entry into the Plan will not become effective before the beginning
of the next offering following his withdrawal, and if the withdrawing employee
is an officer of the Company within the meaning of Section 16 of the Securities
Exchange Act of 1934 he may not re-enter the Plan before the beginning of the
second offering following his withdrawal.

15. CARRYOVER OF ACCOUNT. At the termination of each offering the
Company shall automatically re-enroll the employee in the next offering, and the
balance in the employee's account shall be used for option exercises in the new
offering, unless the employee has advised the Company otherwise. Upon
termination of the Plan, the balance of each employee's account shall be
refunded to him.

16. INTEREST. No interest will be paid or allowed on any money in the
accounts of participating employees.

17. RIGHTS NOT TRANSFERABLE. No employee shall be permitted to sell,
assign, transfer, pledge, or otherwise dispose of or encumber either the payroll
deductions credited to his account or any rights with regard to the exercise of
an option or to receive shares under the Plan other than by will or the laws of
descent and distribution, and such right and interest shall not be liable for,
or subject to, the debts, contracts, or liabilities of the employee. If any such
action is taken by the employee, or any claim is asserted by any other party in
respect of such right and interest whether by garnishment, levy, attachment or
otherwise, such action or claim will be treated as an election to withdraw funds
in accordance with Section 14.

18. TERMINATION OF EMPLOYMENT. Upon termination of employment for any
reason whatsoever, including but not limited to death or retirement, the balance
in the account of a participating employee shall be paid to the employee or his
estate.

19. AMENDMENT OR DISCONTINUANCE OF THE PLAN. The Board shall have the
right to amend, modify, or terminate the Plan at any time without notice,
provided that no employee's existing rights under any offering already completed
under Section 4 hereof may be adversely affected thereby, and provided further
that no such amendment of the Plan shall, except as provided in Section 20,
increase the total number of Shares to be offered unless shareholder approval is
obtained therefor. If the Plan is terminated during an offering, the balance in
the accounts of participating employees shall be paid to the employees.

A-4

20. CHANGES IN CAPITALIZATION. In the event of reorganization,
recapitalization, stock split, dividend, combination of shares, merger,
consolidation, offerings of rights, or any other change in the structure of the
common shares of the Company, the Board may make such adjustment, if any, as it
may deem appropriate in the number, kind, and the price of Shares available for
purchase under the Plan, and in the number of Shares which an employee is
entitled to purchase under any outstanding option.

21. SHARE OWNERSHIP. Notwithstanding anything herein to the contrary,
no employee shall be permitted to subscribe for any Shares under the Plan if
such employee, immediately after such subscription, owns shares (including all
Shares which may be purchased under outstanding subscriptions under the Plan)
possessing 5% or more of the total combined voting power or value of all classes
of shares of the Company or of its parent or subsidiary corporations.

22. ADMINISTRATION. The Plan shall be administered by the Board. The
Board shall be vested with full authority to make, administer, and interpret
such rules and regulations as it deems necessary to administer the Plan, and any
determination, decision, or action of the Board in connection with the
construction, interpretation, administration, or application of the Plan shall
be final, conclusive, and binding upon all participants and any and all persons
claiming under or through any participant. The Board may delegate any or all of
its authority hereunder to such committee as it may designate.

23. NOTICES. All notices or other communications by a participant to
the Company under or in connection with the Plan shall be deemed to have been
duly given when received by the Human Resources Department of the Company or
when received in the form specified by the Company at the location, or by the
person, designated by the Company for the receipt thereof.

24. TERMINATION OF THE PLAN. This Plan shall terminate at the earliest
of the following: (a) June 30, 2005; (b) the date the Board acts to terminate
the Plan in accordance with Section 19 above; or (c) the date when all shares
reserved under the Plan have been purchased.

25. LIMITATION ON SALE OF STOCK PURCHASED UNDER THE PLAN. The Plan is
intended to provide common stock for investment and not for resale. The Company
does not, however, intend to restrict or influence any employee in the conduct
of his own affairs. An employee, therefore, may sell stock purchased under this
Plan at any time he chooses, subject to compliance with any applicable federal
or state securities laws. THE EMPLOYEE ASSUMES THE RISK OF ANY MARKET
FLUCTUATIONS IN THE PRICE OF THE STOCK.

26. GOVERNMENTAL REGULATION AND REGISTRATION OF SHARES. The Company's
obligation to sell and deliver shares of the Company's common stock under this
plan is subject to the approval of, or registration of shares of common stock
with, applicable governmental authorities required in connection with the
authorization, issuance, or sale of such shares.

A-5
22

- --------------------------------------------------------------------------------

PLEXUS CORP.

PROXY FOR 2000 ANNUAL MEETING OF SHAREHOLDERS

The undersigned hereby appoints Peter Strandwitz, John L. Nussbaum and
Joseph D. Kaufman, and any of them, proxies, with full power of
substitution, to vote all shares of stock which the undersigned is
entitled to vote at the annual meeting of shareholders of Plexus Corp.
to be held at the Park Plaza Valley Inn, located at 123 East Wisconsin
Avenue, Neenah, Wisconsin, on Wednesday, March 1, 2000 at 10:00 a.m.
Central Time, or at any adjournment thereof, as follows, hereby
revoking any proxy previously given:

(1)ELECTION OF DIRECTORS:
FOR all nominees listed below [ ] WITHHOLD AUTHORITY [ ]
(except as specified to the contrary below) to vote for all nominees listed below

David J. Drury, Dean A. Foate,Harold R. Miller, John L. Nussbaum,
Thomas J. Prosser, Agustin A. Ramirez, Peter Strandwitz, Jan K.Ver Hagen

(INSTRUCTION: To withhold authority to vote for any individual nominee,
please print that nominee's name on the following line.)

-----------------------------------------------------------------------

(2) APPROVAL OF THE PLEXUS CORP. 2000 EMPLOYEE STOCK PURCHASE
PLAN:

FOR [ ] AGAINST [ ] ABSTAIN [ ]

(3) In their discretion on such other matters as may properly come
before the meeting or any adjournment thereof; all as set out in the
Notice and Proxy Statement relating to the annual meeting, receipt of
which is hereby acknowledged.

(Continued and to be signed on reverse side)
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
THIS PROXY WHEN PROPERLY EXECUTED WILL BE VOTED IN THE MANNER DIRECTED
HEREIN BY THE UNDERSIGNED SHAREHOLDER. IF YOU DO NOT PROVIDE A
DIRECTION, THIS PROXY WILL BE VOTED "FOR" EACH OF THE NOMINEES FOR
DIRECTOR LISTED IN PROPOSAL (1) AND "FOR" PROPOSAL (2).

Dated .................. , 2000

...............................
(Please sign exactly as name
appears at left.)

...............................
(If stock is owned by more than
one person, all owners should
sign. Persons signing as
executors, administrators,
trustees or in similar
capacities should so indicate.)

THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS
- --------------------------------------------------------------------------------