Exhibit 21
Plexus 2005 10-K

1. Plexus Services Corp. (“PSC”), a Nevada corporation and subsidiary of Plexus Corp.

a.	Plexus Intl. Sales & Logistics, LLC (“PISL”), a Delaware LLC and subsidiary of PSC
b.	Plexus QS, LLC, (“PQS”), a Delaware LLC and subsidiary of PSC
c.	Plexus Electronica S.de R.L. de C.V., a Mexico entity and subsidiary of PSS and PQS

2. Plexus International Services, Inc. (“PISI”), a Nevada corporation and subsidiary of Plexus Corp.

a. Plexus Corp. Limited (“PCL”), a United Kingdom corporation and subsidiary of PISI

(i) Plexus Corp. (UK) Limited (“PCLUK”), a United Kingdom corporation and subsidiary of PCL

b. Plexus Asia, Ltd. (“PAL”), a British Virgin Islands corporation, approximately 82% owned by PISI and 18% owned by PCLUK

(i)	Plexus (Xiamen) Co., Ltd., a Peoples’ Republic of China corporation and subsidiary of PAL
(ii)	Plexus Manufacturing Sdn. Bhd., a Malaysia corporation and subsidiary of PAL

3. PTL Information Technology Services Corp., a Nevada corporation and subsidiary of Plexus Corp.

4. Plexus Management Services Corporation, a Nevada corporation and subsidiary of Plexus Corp.

Omits inactive and dormant subsidiaries.