The U.S. Office of Foreign Assets Control (OFAC) has added four cryptocurrency exchanges based in Iran to its sanctions list. According to a report by analytics firm TRM Labs, these platforms collectively accounted for 78% of all trading volume in the country's domestic market in 2025.

The new measures extend secondary sanctions to non-U.S. financial institutions under Executive Order 13902. This means that any foreign organizations interacting with these exchanges could themselves face regulatory action.

This decision is part of a series of three enforcement layers implemented over the past five months. The information source is limited to metadata from a single primary publisher, so independent confirmation of operational details is currently unavailable.