COSH: 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
[email protected]
+45 29 93 54 54

Investor Relations Phone: 
+352 20 20 2401 
[email protected] 
www.theconstellation.com/ir 

IR Team: 
Monique Fares / [email protected] 
João Gabriel Ratton / [email protected]
Victor Mello Paranhos / [email protected] 
Joao Pedro Zakour Monteiro de Souza [email protected] 

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 
isclosure requirements pursuant to section\
5-12 of the Norwegian Securities Trading \