Constellation Schedules Third Quarter 2025 Earnings Release and Conference Call

Luxembourg, October 28th, 2025 - Constellation Oil Services Holding S.A.("Constellation" or the "Company") will hold its third quarter 2025 earningscall at 11:00 a.m. BRT (09:00 a.m. EST | 03:00 pm CET) on Wednesday, November26, 2025. The interim financial statements and the quarterly earnings releasewill be issued on the day before the conference call on NewsWeb and atri.theconstellation.com.

The conference call will be webcast live at:

https://tenmeetings.com.br/ten-events/#/webinar?evento=ConferenciadeResultados3T25-CONST.OIL_405 .

It is recommended that participants call 10 minutes prior to the scheduledstarttime. A webcast replay of the call will be available on our Investor Relationswebsite, on the Results Center session.

About Constellation

Constellation is a market leading provider of offshore oil and gas contractdrilling services through its subsidiary Serviços de Petróleo ConstellationS.A.("Serviços de Petróleo Constellation"). With continuous operations since 1981,Serviços de Petróleo Constellation has built an unmatched reputation forexcellence in offshore drilling services, obtaining ISO 9001, ISO 14001, ISO45001, and API Spec Q2 certifications for its quality management,environmentaland safety records and systems.

IMPORTANT NOTICE

Matters discussed in this announcement may constitute forward-lookingstatements. Forward-looking statements are statements that are not historicalfacts and may be identified by words such as "anticipate", "believe","continue", "estimate", "expect", "intends", "may", "should", "will" andsimilarexpressions. The forward-looking statements in this release are based uponvarious assumptions, many of which are based, in turn, upon furtherassumptions.Although the Company believes that these assumptions were reasonable whenmade,these assumptions are inherently subject to significant known and unknownrisks,uncertainties, contingencies and other important factors which are difficultorimpossible to predict and are beyond its control. Such risks, uncertainties,contingencies and other important factors could cause actual events to differmaterially from the expectations expressed or implied in this release by suchforward-looking statements. The information, opinions and forward-lookingstatements contained in this announcement speak only as at its date, and aresubject to change without notice.

This announcement is made by, and is the responsibility of, the Company.

This announcement is for information purposes only and is not to be relieduponin substitution for the exercise of independent judgment. It is not intendedasinvestment advice and under no circumstances is it to be used or considered asan offer to sell, or a solicitation of an offer to buy any securities or arecommendation to buy or sell any securities of the Company. The distribution of this announcement and other information may be restrictedbylaw in certain jurisdictions. Persons into whose possession this announcementorsuch other information should come are required to inform themselves about andto observe any such restrictions.

This announcement does not constitute or form a part of any offer ofsecuritiesfor sale or a solicitation of an offer to purchase securities of the companyinthe United States or any other jurisdiction. Not for publication, distributionor release, in whole or in part, directly or indirectly, in or into the UnitedStates of America (including its territories and possessions, any state of theunited states of America and the district of Columbia) (the "united states"),Australia, Canada, the Hong Kong special administrative region of the people'srepublic of China or Japan, or any other jurisdiction in which thepublication,distribution or release would be unlawful.

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