The Attorney General’s Office (AGO) has charged former CEO of PT Pertamina Patra Niaga, Riva Siahaan, for allegedly enriching 13 domestic companies through the sale of non-subsidized diesel fuel below cost, in a major corruption case involving the management of crude oil and refinery products at holding PT Pertamina between 2018 and 2023.
One of the companies named in the indictment is PT Adaro Indonesia, owned by businessman Boy Thohir − the older brother of Indonesia’s Youth and Sports Minister Erick Thohir − which prosecutors allege to have benefited by Rp168.51 billion (US$10.2 million).
According to prosecutors, Riva failed to establish or enforce pricing negotiation guidelines as required under Pertamina’s internal directives, resulting in losses for Pertamina Patra Niaga.
“The defendant, Riva Siahaan, did not prepare or determine the guidelines governing the price negotiation process as stipulated in the CEO Decree No. Kpts-034/PNA000000/2022-S0 dated October 10, 2022,” prosecutors said during the indictment reading at the Central Jakarta Corruption Court on Thursday, October 9, 2025.
The 13 companies allegedly benefited from the below-cost diesel sales, including:
PT Berau Coal, PT Buma, PT Merah Putih Petroleum, PT Adaro Indonesia, PT Pama Persada Nusantara, PT Ganda Alam Makmur, PT Indocement Tunggal Prakarsa, PT Aneka Tambang, PT Maritim Barito Perkasa, PT Vale Indonesia, PT Nusa Halmahera Minerals, PT Indo Tambangraya Megah, and PT Puranusa Ekapersada.
“The sale of non-subsidized diesel enriched these corporations by a total of Rp2.54 trillion,” the prosecutors added.
The investigation has also linked the alleged misconduct to broader state losses in the oil trade. According to the prosecution, irregularities in crude oil management and refinery product trading have caused total state losses amounting to Rp285.18 trillion (US$17.4 billion) − including overpricing, illegal gains, and inefficiencies in fuel procurement.
Earlier, the AGO summoned HG, a director at Adaro Indonesia, as a witness in the ongoing investigation into the Pertamina oil corruption case on August 4, 2025.
Adaro’s Corporate Secretary, Ray Aryaputra, clarified in a disclosure to the Indonesia Stock Exchange (IDX) that the company was not the only fuel buyer called for questioning.
“There are several other fuel purchasing companies that were also summoned to provide testimony,” Ray said in a statement on August 12, 2025.
Ray cited that HG informed investigators that Adaro had purchased fuel for its operations through open tenders − processes that included Pertamina and other suppliers since 2015 − with pricing based on the Mean of Platts Singapore (MOPS) benchmark plus a margin.
“Mr. HG attended and provided the requested information, although he does not understand the correlation between Adaro Indonesia’s activities and the investigation,” Ray said, adding that the company “supports the legal process and continues to monitor the case closely.”
As of now, Adaro’s corporate communications team has not issued a formal response to the inclusion of its name in the prosecutor’s indictment.
Meanwhile, prosecutors reported that the oil corruption case involved a total of 18 suspects, of whom four − including Riva Siahaan, Maya Kusmaya, Edward Corne, and Sani Dinar Saifuddin − have already gone to trial.
The defendants are charged under Article 3(1) in conjunction with Article 18 of Indonesia’s Anti-Corruption Law, and Article 55(1) of the Criminal Code (KUHP), for allegedly abusing their authority and causing significant financial losses to the state.