Siem OffshoreInc. (the “Company”) is the issuer of 2.75% convertible bonds with ISIN NO0010708670 (the “Bonds”). On 4 May 2021, the Company was notified that SiemIndustries S.A., of which Mr Kristian Siem (a Non-Executive Director andChairman of the Company) is a director and shareholder, transferred itsinterests in 628,959,823 Bonds to Siem Sustainable Energy S.à r.l., of which MrKristian Siem is a director and indirect shareholder. The attachednotifications are made in accordance with the requirements of the EU MarketAbuse Regulation.

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