Okmetic Oyj - Major shareholder announcements

OP-SUOMI ARVO'S OWNERSHIP OF OKMETIC'S SHARES TO 6.29 PERCENT

OKMETIC OYJ       STOCK EXCHANGE ANNOUNCEMENT     21 MAY 2007

OP-SUOMI ARVO'S OWNERSHIP OF OKMETIC'S SHARES TO 6.29 PERCENT

Notification of a change in holdings as required by Chapter 2, Section
9 of the Finnish Securities Markets Act:

Okmetic Oyj has received notification that on 11 May 2007 the total
holding that OP-Suomi Arvo (Trade Register number 1878493-1), a mutual
investment fund governed by OP Fund Management Company Ltd, which is a
subsidiary of OP Bank Group Central Cooperative, has in the Company
risen to 1,061,950 shares, which corresponds to 6.29 percent of
Okmetic's share capital and voting rights.

Okmetic Oyj's share capital as recorded in the Trade Register
comprises a total of 16,887,500 shares. Each share entitles its holder
to one vote.

OKMETIC OYJ

Esko Sipilä
Senior Vice President, Finance

For more information, please contact:

Senior Vice President, Finance Esko Sipilä, Okmetic Oyj,
Tel. +358 9 5028 0286, email: esko.sipila@okmetic.com

Distribution:

Helsinki Exchanges
Principal media

IN BRIEF

Okmetic - Take it higher

Okmetic is a technology Company that manufactures and carries out
further processing on high-quality silicon wafers for the sensor and
semiconductor industries. The Company also sells technology. Okmetic's
wafers are part of a further processing chain, which produces end
products that improve human interaction and quality of life.

Okmetic's products are based on innovative product development, an
efficient production process and a strong partner network. The Company
offers its customers solutions that enhance their competitiveness and
profitability.

Okmetic has plants in Vantaa, Finland and in Allen, Texas in North
America. The Company is quoted on the Helsinki Stock Exchange (Nordic
Small Cap list: OKM1V). More information about the Company can be
found at www.okmetic.com.