Ad Hoc Announcement: Effectiveness of the Combination with Coherent, Inc.

Plymouth, Michigan/USA and Hamburg/Germany, November 7, 2016 - Today, the combination of ROFIN-SINAR Technologies Inc. with Coherent, Inc. pursuant to the previously announced merger agreement dated March 16, 2016, by way of a merger of Rembrandt Merger Sub Corp., a wholly-owned subsidiary of Coherent, Inc., with and into ROFIN-SINAR Technologies Inc. became effective.

As a consequence of the effectiveness of the transaction, Coherent, Inc. has become the sole shareholder of ROFIN-SINAR Technologies Inc. Each share of common stock in ROFIN-SINAR Technologies Inc. issued and outstanding immediately prior to the effective time of the transaction (other than treasury shares and shares held by Coherent, Inc. or any of their respective subsidiaries, or as to which a shareholder properly demanded and perfected its appraisal rights under Delaware law) was cancelled and extinguished and converted into the right to receive the per share merger consideration of $32.50 in cash, without interest.

As a further consequence, the listing of the ROFIN-SINAR-shares on the Frankfurt Stock Exchange will be revoked officially by Deutsche Börse AG within the next days. Any stock market trading which may take place until such revocation will only relate to the shareholders' entitlements to the per share merger consideration. The listing of ROFIN-SINAR on the NASDAQ Stock Market will also be discontinued.

Further details regarding the payment of the merger consideration to the shareholders, which is expected to be effected through the depositary banks, will be published separately by ROFIN- SINAR Technologies Inc. on its website in the section headed "Investor Relations".

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Contact:

ROFIN-SINAR Technologies Inc. RSTI/Investor Relations‌

040-73363-4256

ir(at)rofin.com

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