MATERIAL FACT ZOZ6 RESERVES CERTIFICATION Rio de Janeiro, March to, zoZ6 - PRIO S.A. f"Company" or "PRIO"J hereby informs its shareholders and the general market that it has published a new reserves certification of the Company, prepared by DeGolyer s MacNaughton "D&M" , dated January 1, Z0z6, which includes the reserves of the Polvo ana TBMT (Bravo› cluster, Frame and Wahoo (Valente› cluster, the Albacora Leste field and the Peregrino field. Summary of reserves:
Ffeld
Jan/ZS DIM IP
Ofl (MMbbI)
ZOZ5 Production
Jan/ZS Post Prod.
Jan/Z6
D&M IP
Cluster Valente Frade (100•7o} Wahoo (100%o› Cluster Bravo Polvo (100%o›
Tubarao Martelo (100%o›
zoo.o
764.9
ZZ.9
47.B
lW.1
717.O
ZIS.B
7EC3
Albacora Leste t9OR&1
TOtZI IP Bf'tPP CIOSIFT@
TOtZI IP + IC
B14.9 90.9
905.B
sa.s
sa.s
761.3
90.9
BSZ.Z
PGM IFTO (ZO9/b)
Z41.S 11B.B
1ZZ.7
34.1
1S.B
1B.3
ZB9.Z
50.0
11.Z
11.Z
0
4.6
Z.1
Z.S
9.1
S.7
z3o.3 107.6 l2Z.7 Z9.S 13.7
15.B
ZBOT
ss.a
Z3Z.S
llO.B 121.7 EE.6 lB.7 16.9 ZT3.4
53.9
Summary of CAPEX associated with reserves:
Jan/Z5 a&M w | sanzzs a&M w | Jan/Z5 D6M IP | D6M IP | D6M IP | iuss ¥r¥u D6M IP | |
FradeliOOR/o) | 88.0 SLO | 3@ | Z.2 | 55.0 SI. 0 | ||
Wahoo l1OO&o) | 850.0 ezoo"' | 6. 9 | 7.1 | 51.3 S1. 3 | ||
Polvo * TBMT l1OO9/o} | 64.5 | 40.5 | 3.8 | 9.1 | ZS.3 | Zft. 8 |
Albacora Leste l9O9/oI | s.z 5.8 | 60.9 | 63. 3 | |||
1,136.1 | 1,1513 | |||||
Peregr ino (1DO9o› | I4j | 345.0 | 3.3 | 17. S | ||
Notes:
(1 Does not include production-maintenance CAPEX.
(2› Considers 100% CAPEX for drilling and completion of new wells.
T3› Amount referring to the project's total CAPEX, with USA 644 million already incurred as of December 31, 2025.
T4› Capex information for the Peregrino field was not included in 2025, as PRIO was not the operator of the asset in the previous
certification.
In the Frame field, one infill well was considered for ZOZ6, ana one of the wells previously included in the PDNP was reclassified to 1C. Additionally, the CAPEX Der well was revised to reflect the current drilling cost expectations for the field as the project aavancea to a higher level of definition. In the Wahoo field, the certification was uDdatea to incorDorate the Droject's latest schedule. Total CAPEX was also aajustea to USA 870 million, reflecting the most up-to-aate estimate following suDstantial progress in project executionIn Albacora Leste, the IP Droauction curve was revised considering the current expectation for obtaining the environmental licenses required to Degin the drilling campaign. In addition, one Well previously included in the PUD was reclassified to IC. The CAPEX per adaea Darrel increased mainly due to the exclusion of the two hgarated Wells that Were reoDenea in 20z5 add had lower CAPEX Der added barrel.
In the Polvo ana TBMT cluster, the new certification now incorDorates the PoL-GY well in the Polvo fiela, which began Droauction in Z025 and had not Deen included in the cluster's reserves previously, contributing z.3 million barrels. The IP curve was also adjusted to reflect a lower decline rate for the fiela. Additionally, one producing well Well B) was considered for 20Z6 ana another producing well Well A› is planned for 20Z7 in the Polvo fiela. Regarding CAPEX, the previous certification haa incluaea two vvorkovers in TuDarao Martelo, which resulted in lower CAPEX per added Darrel, since these interventions carry lower costs than drilling new wells
Finally, in the Peregrino field, the certification Was adjusted to reflect the OPEX reduction implemented by PRIO after assuming operation of the asset, which enaDlea the extension of the fiela's useful life ana aaaea 19.3 million Darrels to the IP curve. Additionally, Z9 million barrels were incluaea relating to the reserves of the area of the field knoWn as "isolated™, corresDonaing to the volume iaentifiea aoWn to the LK0 Lowest Known Oil). The drilling Dlanned for this year will enable the assessment of a potential volume increase in this area.
Access the full report at: httOs://ri. Orio3.com. br/en/servicos-aos-investidores/certification-reoorts/
About PRIO
PRIO is the largest independent company in the oil and gas production in Brazil. The company"s corporate culture seeks to increase production through the acquisition of new production assets, the redevelopment of assets, increased operational efficiency and reduction of production costs and corporate expenses. PRIO's main oDjective is to create value for its shareholders with growing financial discipline and preserving its liquidity, with ful respect for safety and the environment. ror further information, please visit the company's weDsite: https://www.prio3.com Dr.
Disclaimer
This news release contains forward-looking statements. All statements other than statements of historical fact contained in this news release are forward-looking statements, including, without limitation, statements regarding our drilling and seismic plans, operating costs, acquisitions of equipment, expectations of finding oil, the quality of oil we expect to produce and our other plans and oDjectives. Readers can identify many of these statements Dy looking for words such as "expects", "Delieve", "hope" and "will" and similar words or the negative thereof. Although management Delieves that the expectations represented in such forward-looking statements are reasonaDle, there can De no assurance that such expectations will prove to De correct. By their nature, forward-looking statements require us to make assumptions and, accordingly, forward-looking statements are suDject to inherent risks and uncertainties. We caution readers of this news release not to place undue reliance on our forward-looking statements Decause a numDer of factors may cause actual future circumstances, results, conditions, actions or events to differ materially from the plans, expectations, estimates or intentions expressed in the forward-looking statements and the assumptions underlying the forward-looking statements.
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