General Announcement::Constellation First Day of Trading on Euronext Oslo Bors

Issuer & Securities

Issuer/ Manager
CONSTELLATION OIL SERVICES HOLDING S.A.
Securities
CONSTEOILUS$650M9.375%N291107A - US650921AA71 - 5TCB
CONSTEOILUS$650M9.375%N291107R - USL67356AA09 - 9QPB
Stapled Security
No

Announcement Details

Announcement Title
General Announcement
Date &Time of Broadcast
26-May-2026 21:01:04
Status
New
Announcement Sub Title
Constellation First Day of Trading on Euronext Oslo Bors
Announcement Reference
SG260526OTHRM0ZJ
Submitted By (Co./ Ind. Name)
Joao Pedro Zakour
Designation
Investor Relations Analyst
Description (Please provide a detailed description of the event in the box below)
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 B rs, 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 B rs.

For further information, please contact:

Media:
Thomas C. H ie, 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
Jo o 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 Servi os de Petr leo Constellation S.A. ( Servi os de Petr leo Constellation ). With continuous operations since 1981, Servi os de Petr leo 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 Act and Euronext Oslo Rule Book II - Issuer Rules.

Attachments

Constellation First Day of Trading on Euronext Oslo Bors.pdf
Total size =199K