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Investor Relations
8F, No. 68, Sec. 1, Neihu Rd.,
Taipei 114, Taiwan, R.O.C.
Fax: 886-2-2658-8369
Email: ir@umc.com

Please direct questions regarding UMC's ADR to:

JPMorgan Depositary Receipts
1 Chase Manhattan Plaza, Floor 58
New York, NY 10005, U.S.A.
http://www.adr.com

Toll free in USA: 1-800-990-1135
Outside USA: 1-651-453-2128

Please direct questions regarding stockholders' accounts and stock transfers to:
Horizon Securities
Address: 3F, No. 236 Sec. 4, Hsin-I Rd., Taipei, Taiwan, R.O.C.
Tel: 886-2-2326-8818
Email: service@honsec.com.tw
http://www.honsec.com.tw

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