Plexus Announces Modest Expansion in United Kingdom

KELSO, Scotland - Plexus Corp. (Nasdaq: PLXS), announced today that it intends to enter
into a lease agreement on a building located in Tweedside Park, Tweedbank,
Galashiels. This facility will consolidate other leased locations in the
region and incrementally add an additional 25,000 sq ft of manufacturing
space required for recent program wins from both new and existing customers.
The additional space will support Mechatronics assembly with logistics
services and will increase Plexus’ overall footprint in the UK to 100,000 sq
ft. It is anticipated that the facility will be ready for production by April
2009 and will employ approximately 50 people by December 2009.

Willie MacKinnon, UK Managing Director, commented, “This expansion
provides an exciting opportunity for Plexus and its employees in the UK and
shows our ongoing commitment to the area. It also demonstrates our ability to
attract new opportunities, despite the economic downturn. This is largely due
to our experience and professionalism in delivering world-class service
offerings to our customers as we continue our vision to be the best EMS
Company in the world in the mid- to low-volume, higher-mix segment of the
market.”

Combined with Plexus’ current Kelso, Scotland manufacturing facility,
their new manufacturing facility in Oradea, Romania and their design services
capabilities in Livingston, Scotland, this new location will further Plexus’
ability to deliver the best regional value proposition for its customers by
providing an EMS solution that delivers flexibility, agility and world-class
execution.

About Plexus Corp. - The Product Realization Company

Plexus (www.plexus.com) is an award-winning participant in the
Electronics Manufacturing Services (EMS) industry, providing product design,
supply chain and materials management, manufacturing, test, fulfillment and
aftermarket solutions to branded product companies in the
Wireline/Networking, Wireless Infrastructure, Medical, Industrial/Commercial
and Defense/Security/Aerospace market sectors.

The Company’s unique Focused Factory manufacturing model and global
supply chain solutions are strategically enhanced by value-added product
design and engineering services. Plexus specializes in mid- to low-volume,
higher-mix customer programs that require flexibility, scalability,
technology and quality.

Plexus provides award-winning customer service to more than 100 branded
product companies in North America, Europe and Asia.

Safe Harbor and Fair Disclosure Statement

The statements contained in this release which are guidance or
which are not historical facts (such as statements in the future tense and
statements including “believe,” “expect,” “intend,” “plan,” “anticipate,”
“goal,” “target” and similar terms and concepts), including all discussions
of periods which are not yet completed, are forward-looking statements that
involve risks and uncertainties, including, but not limited to: the risk of
customer delays, changes or cancellations in both ongoing and new programs;
our ability to secure new customers and maintain our current customer base
and deliver product on a timely basis; the poor visibility of future orders,
particularly in view of current economic conditions; the economic performance
of the electronics, technology and defense industries; the effects of the
volume of revenue from certain sectors or programs on our margins in
particular periods; the risks relative to a new confidential customer in the
Industrial/Commercial sector, including customer delays, start-up costs, our
potential inability to execute and lack of a track record of order volume and
timing; the risks of concentration of work for certain customers; the
increasing weakness of the global economy and the continuing instability of
the global financial markets and banking system, including the potential
inability of us or our customers or suppliers to access cash investments and
credit facilities; material cost fluctuations and the adequate availability
of components and related parts for production; the effect of changes in
average selling prices; the effect of start-up costs of new programs and
facilities, including our recent and planned expansions; the adequacy of
restructuring and similar charges as compared to actual expenses, including
the announced closure of our Ayer, MA facility and workforce reductions at
our Juarez, Mexico facility; the degree of success and the costs of efforts
to improve the financial performance of our Mexican operations; possible
unexpected costs and operating disruption in transitioning programs; the
costs and inherent uncertainties of pending litigation; the potential effect
of world events (such as changes in oil prices, terrorism and war in the
Middle East); the impact of increased competition; and other risks detailed
in the Company’s Securities and Exchange Commission filings (particularly in
Part II, Item 1A of our quarterly report on Form 10-Q for the quarter ended
January 3, 2009).

Source: Plexus Corp.

Willie MacKinnon, UK Managing Director of Plexus Corp., +44-1573-227054, willie.mackinnon at plexus.com