"We can suspend trading after we receive the relevant documents from the court or recommendations from the regulatory body," exchange press secretary Vadim Yegorov said.
Earlier, Russia's main stock market, the RTS, said it had suspended trading in Transneft preferred shares until detailed information on the case was provided.
"We heard about the court's decision, but we have no documents confirming the news, which is why we have decided to suspend dealing until the circumstances are revealed," an RTS spokesperson said.
Moscow's Basmanny district court ruled earlier Friday to freeze shares in the pipeline monopoly after the Prosecutor General's Office launched a probe into illegal privatization of shares and abuse of office.
A court source said the shares had been illegally distributed among various companies and were later discovered at Registrator ROST, one of Russia's largest companies that services share registers.
Ilya Zafakayev, head of Registrator ROST's PR service, said the company suspended transactions in Transneft preferred shares.
The news that Transneft preferred shares have been frozen has already sent them 7-8% down on stock exchanges.
But Transneft vice President Sergei Grigoryev said the suspension of trading would not affect its activity, as the shares are preferred and not voting shares.
"These shares are held by individuals and are not voting [shares], and the company's management has nothing to do with them," he said, adding that the state held 100% of voting shares.
