Mehdi Aqdaie, deputy director of Iran's Privatisation Organization, said the Bandar Abbas and Abadan refineries would be among the first companies offered for sale on the Tehran Stock Exchange.
Quoted by the Iran daily, he did not give details on the size of the stakes Iran wanted to sell and how much ownership the state would retain.
Iran, the world's fifth-largest crude exporter, is seeking to speed up the sale of state assets in a bid to encourage private investment and boost the economy, which is under U.S. and U.N. sanctions over Tehran's disputed nuclear programme.
Western firms are increasingly wary of investing in Iran due to the long-running nuclear row, and analysts say some of the companies that are put up for sale may simply end up being transferred within the country's vast public sector.
Aqdaie, citing the budget law for the Iranian year that started on March 21, said 524 companies were due to be privatised during the year, including vehicle firms Iran Khodro and Saipa as well as Dana Insurance.
"The projected budget (income) from the sale of the companies stand at around $12.5 billion, which will be used towards the reimbursement of government debt," he said.
Last year, a consortium linked to the elite Revolutionary Guards took a controlling stake of 50 percent plus one share in the Telecommunications Company of Iran in a deal valued at around $7.8 billion.
The United States and its allies suspect Iran is seeking to develop nuclear bombs. Tehran denies the charge and says its nuclear work is aimed at generating electricity so that it can export more of its oil and gas. (Reporting by Hashem Kalantari; Writing by Fredrik Dahl; Editing by David Fox)
