FOR IMMEDIATE RELEASE

PLEXUS TO WEBCAST INVESTOR PRESENTATION AT CITIGROUP TECHNOLOGY CONFERENCE ON SEPTEMBER 5, 2007

NEENAH, WI, August 29, 2007 -- Plexus Corp. (Nasdaq: PLXS), today announced it will webcast its investor relations presentation at the Citigroup Technology Conference on September 5, 2007 at 8:40 a.m. Eastern Time.

What: Plexus Corp.’s IR Presentation at Citigroup Technology Conference

When: Wednesday, September 5 th at 8:40 a.m. Eastern Time

Where: http://www.veracast.com/webcasts/citigroup/tech07/79202296.cfm

(requires Windows Media Player)

Replay: The webcast will be archived until October 6, 2007

** Please contact Dianne to switch from fax to email distribution **

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, test, manufacturing and fulfillment and aftermarket solutions to branded product companies in the Wireline/Networking, Wireless Infrastructure, Medical, Industrial/Commercial and Defense/Security/Aerospace industries.

The Company’s unique Focused Factory manufacturing model and proprietary global supply chain solutions are strategically enhanced by value-added product design and engineering services. Plexus specializes in 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.

For further information, please contact:

Kristian Talvitie, Vice President Marketing, Branding & Corporate Communications

920-969-6160

kristian.talvitie@plexus.com

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