The Board of Directors of Okmetic Oyj supplements its statement concerning the public Tender Offer by National Silicon Industry Group and renews its recommendation

OKMETIC OYJ STOCK EXCHANGE RELEASE 1 JUNE 2016 AT 9.30 A.M.

NOT FOR RELEASE OR DISTRIBUTION, DIRECTLY OR INDIRECTLY, IN WHOLE OR IN PART, IN OR INTO OR TO ANY PERSON LOCATED OR RESIDENT IN THE UNITED STATES, CANADA, JAPAN, AUSTRALIA, SOUTH AFRICA OR HONG KONG OR IN ANY OTHER JURISDICTION IN WHICH THE TENDER OFFER OR SUCH RELEASE OR DISTRIBUTION WOULD BE PROHIBITED BY APPLICABLE LAW OR REQUIRE OFFER DOCUMENTS, REGISTRATION OR OTHER MEASURES IN ADDITION TO THOSE REQUIRED UNDER FINNISH LAW.

THE BOARD OF DIRECTORS OF OKMETIC OYJ SUPPLEMENTS ITS STATEMENT CONCERNING THE PUBLIC TENDER OFFER BY NATIONAL SILICON INDUSTRY GROUP AND RENEWS ITS RECOMMENDATION

Okmetic Oyj ("Okmetic") announced on 1 April 2016 that Okmetic and National Silicon Industry Group ("NSIG") had entered into a combination agreement pursuant to which NSIG, either directly or through its subsidiary, will make a voluntary public tender offer to purchase all of the issued and outstanding shares and option rights in Okmetic that are not owned by Okmetic or any of its subsidiaries (the "Tender Offer"). NSIG Finland S.à r.l (the "Offeror"), a wholly-owned indirect subsidiary of NSIG, commenced the Tender Offer on 22 April 2016.

Pursuant to the press release published by NSIG on 30 May 2016, all the conditions to completion of the Tender Offer have been satisfied during the initial offer period and the Tender Offer has thus become unconditional. According to the press release, the Offeror has decided to extend the Offer Period to expire on 14 June 2016 at 4:00 p.m. Finnish time and has reserved a right to further extend the Offer Period but however not beyond 30 June 2016. According to the press release, due to the extension of the offer period, the Offeror has decided to amend the terms and conditions of the Tender Offer to the benefit of the shareholders and the holders of option rights, to allow acceptances for the shares and option rights validly tendered in the Tender Offer to be withdrawn at any time during the extended offer period or, if the offer period has been further extended, during such further extended offer period, despite the fact that the Offeror has declared the Tender Offer unconditional and is obliged to complete the Tender Offer. The press release of NSIG is attached in its entirety as Appendix 1.

NSIG and the Offeror has on 31 May 2016 published a supplement to the tender offer document and announced that the Finnish Financial Supervisory Authority has approved the said supplement to the tender offer document. The supplement to the tender offer document is attached as Appendix 2. Pursuant to the supplement to the tender offer document, the only amendment to the terms and conditions of the Tender Offer is the above-described withdrawal right of the shareholders and the holders of option rights.