How U.S. Sanctions Target Networks That Supply Iran’s Missiles and Drones

The U.S. Treasury’s recent sanctions campaign in April and May 2026 has sought to sever the procurement pathways that sustain Iran’s ballistic missile and unmanned aerial vehicle programs. On May 8, 2026 OFAC added a set of firms and individuals to U.S. sanctions lists, including Pishgam Electronic Safeh Company (PESC), which has been tied to the procurement of thousands of servomotors recovered in downed Shahed‑136 UAVs, and Hitex Insulation Ningbo Company Limited for supplying aerospace‑grade carbon fiber and honeycomb materials. These designations were made under executive orders aimed at weapons proliferation and were framed as part of a broader 'Economic Fury' campaign.

At the same time, Treasury targeted maritime networks often described as a shadow fleet and identified smaller, independent Chinese refineries — sometimes called 'teapot' refineries — that processed Iranian crude. U.S. officials have warned that foreign banks risk secondary sanctions if they facilitate Iran‑linked transactions, while Chinese regulators have invoked blocking measures to shield domestic firms from extraterritorial penalties. Consequently, commercial routes that once supplied Iranian defense industries have been disrupted and made more costly.

Though sanctions complicate procurement, procurement networks may adapt by using intermediaries and alternate suppliers, which makes enforcement a continual challenge. Nevertheless, the recent actions have been designed to increase the logistical and financial burden on networks that provide specialized materials for missiles and UAVs.

Treasury officials have even sent warning letters to some Chinese banks about possible secondary sanctions, a step that has been publicly discussed by U.S. officials. In response, Chinese authorities have issued blocking measures aimed at preventing domestic entities from complying with certain foreign sanctions.