Profile and History

PT Aroma Operations Services (AOS) was established in 1989 pursuant to Deed No. 245 dated 17 November 1989. AOS is a subsidiary of PT Pertamina (Persero), which was formed to support the operation of a petrochemical refinery in Cilacap, Central Java. AOS changed its name to PT Pertahulu Energy in 2002, and then to PT Pertamina Hulu Energi (PHE) in 2007. The name change was approved through Deed No. 5 dated 4 August 2008 and is pursuant to Law No. 22 of 2001 on Oil and Gas (Oil and Gas Law).

PT. Pertamina (Persero) is required by the OIl and Gas Law to separate its upstream and downstream oil and gas operations. PHE was handed over management of the nupstream Work Area (WK), which was previously managed 'by PT Pertamina (Persero) in collaboration with third parties via a Joint Operating Body (OB) and Participating Interest (PI). The handover was followed by the transfer of oil and gas block operations to PHE's subsidiaries, as approved by the PT Pertamina (Persero) Board of Directors on 18 September 2007 and the PT Pertamina (Persero) Board of Commissioners on 6 November 2007, PHE is charged with the management of PT Pertamina's (Persero) oil and gas WK.

In line with the establishment of PT Pertamina (Persero) as an oil and gas holding, PHE was appointed as Subholding Upstream in 2021, pursuant to the Decree of the Board of Directors No. Kpts-19/C0000/2020-50 dated 16 June 2020. PHE acquired all shares owned by PT Pertamina (Persero) in 11 (eleven) Upstream Subsidiaries of PT Pertamina in accordance with the Circular Resolution of Shareholders dated 1 September 2021 regarding the Implementation of the Upstream Subholding Establishment (Legal End State), PHE Subholding Upstream manages Work Areas on'a regional basis, taking into account factors such as production volume, regional geography, and operational complexity PHE Subholding Upstream serves as a planner, validator, and police maker. Regional, on the other hand, focuses on optimizers and integrators, as well as on increasing safety, production, and oil and gas reserves. Until the end of 2021 PHE Subholding Upstream consisted of 68 Subsidiaries. Additionally, PHE has 6 (six) joint venture

PHE Subholding Upstream Work Area is divided into 5 (five) Regionals, each of which covers 40 Domestic Work Areas made up of 27 operator blocks and 13 non-operator blocks, as well as 27 International Work Areas spread across 13 countries in Southeast Asia, Africa, Europe, and the Middte Faer