Constellation First Day of Trading on Euronext Oslo Børs
Luxembourg, 26 May 2026 - Constellation Oil Services Holding S.A. (“Constellation” or the “Company”) (ticker: COSH; ISIN: NO0013597419) announces that its depositary receipts (the “Securities”) began trading today on Euronext Oslo Børs, the main regulated market in Norway, following a successful transfer from Euronext Growth Oslo, as previously announced on 21 May 2026. This uplisting represents a significant milestone in the Company’s journey as a publicly traded company and reinforces its commitment to the highest standards of corporate governance, transparency and shareholder value creation.
Rodrigo Ribeiro, the Chief Executive Officer of Constellation said: “When we listed on Euronext Growth Oslo in March 2025, we committed to increasing visibility, deepening investor engagement and demonstrating the strength and resilience of our business. Fourteen months later, we are delivering on those commitments. Brazil’s offshore sector is experiencing a prolonged growth cycle, and Constellation is well positioned through its long-term contracts, operational track record and experienced team that has successfully navigated every market cycle in our industry. We have built a resilient and sustainable business, focused on delivering consistent growth and solid returns to shareholders, and we remain confident in our ability to continue executing on our strategy.”
Constellation has chosen Norway as its Home Member State pursuant to Directive 2004/109/EC (Transparency Directive).
Transaction Advisors: Clarksons Securities AS and DNB Carnegie, a part of DNB Bank ASA, have acted as financial advisors to the Company. Advokatfirmaet Thommessen AS has acted as legal counsel to the Company in connection with the listing on Euronext Oslo Børs.
For further information, please contact:
Media: Thomas C. Høie, Capient constellation@capientco.com +45 29 93 54 54
Investor Relations Phone: +352 20 20 2401 ir@theconstellation.com www.theconstellation.com/ir
IR Team: Monique Fares / mfares@theconstellation.com João Gabriel Ratton / jratton@theconstellation.com Victor Mello Paranhos / vparanhos@theconstellation.com Joao Pedro Zakour Monteiro de Souza jdemonteiro@theconstellation.com
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.
IMPORTANT NOTICE
This information is subject to the disclosure requirements pursuant to section 5-12 of the Norwegian Securities Trading