COSH Successfully Settles USD 650 Million Senior Secured Bond

Luxembourg, 3 August 2026: Constellation Oil Services Holding S.A. (“Constellation” or the “Company”, OSE: COSH) has today successfully settled its USD 650 million senior secured bond due 2033 (the “Bonds”), as previously announced by the Company in its pricing press release dated 22 July 2026. The Bonds carry a fixed coupon of 7.700% p.a., payable semi-annually.

As previously disclosed, the net proceeds from the bond issue, together with cash on hand, will be used to discharge and satisfy in full the Company’s outstanding USD 650 million 9.375% Senior Secured Notes due 2029 (the “Existing Bonds”), and to pay fees and expenses in connection with the transaction. The redemption of the Existing Bonds is expected to settle on August 4, 2026.

An application will be made for the Bonds to be listed on the Singapore Exchange Securities Trading Limited – SGX-ST.

This press release does not constitute an offer of any securities for sale. Any securities have not been and will not be registered under the U.S. Securities Act of 1933, as amended, and may not be offered or sold in the United States absent registration or an applicable exemption from registration requirements.

For further queries, please contact: Investor Relations Team Email: ir@theconstellation.com

Additional information about the Company can be found at Constellation Investor Relations.

About Constellation

Constellation is a market leading provider of offshore oil and gas contract drilling services through its subsidiary Serviços de Petróleo Constellation S.A. (“Serviços de Petróleo Constellation”). With continuous operations since 1981, Serviços de Petróleo Constellation has built an unmatched reputation for excellence in offshore drilling services, obtaining ISO 9001, ISO 14001, ISO 45001, and API Spec Q2 certifications for its quality management, environmental and safety records and systems.