US Targets Iran’s Shadow Fleet as Oil Waiver Expires

Maximum Pressure Returns: U.S. Targets Shadow Fleet Tankers as Iran Oil Waiver Expires

The Trump administration has snapped back to full “maximum pressure” on Iran’s oil trade, ending a short-lived sanctions reprieve while unleashing a sweeping crackdown on the shipping networks that keep Iranian crude moving.

In a coordinated escalation, the U.S. Treasury on Wednesday sanctioned more than two dozen individuals, companies, and vessels tied to Iranian oil magnate Mohammad Hossein Shamkhani, while confirming that temporary waivers allowing Iranian oil sales at sea will expire this week and will not be renewed.

The combined moves mark the clearest signal yet that Washington is shifting from market stabilization back to enforcement.

The Waiver Is Over

On March 20, OFAC took the unusual step of issuing a 30-day general license allowing the sale of Iranian oil already loaded on vessels, unlocking roughly 140 million barrels stranded at sea in an effort to cool surging prices.

That window is now closing. Treasury Secretary Scott Bessent confirmed the administration will not renew the waiver, effectively ending the policy that temporarily allowed Iranian and Russian oil to flow despite sanctions.

Treasury Targets the Shipping Backbone

With the waiver expiring, Treasury is now focusing squarely on the tankers and entities driving Iran’s oil trade.

Today’s sanctions target the network of Mohammad Hossein Shamkhani, which U.S. officials describe as a central hub in a global system moving Iranian and Russian petroleum through a fleet of tankers and front companies.

The action includes a mix of crude, product, and LPG carriers operating under multiple flags and ownership structures designed to obscure control.

A Network Built for Evasion

Treasury said the Shamkhani network operates through a web of front companies across the UAE, India, and the Marshall Islands, handling ship management, procurement, logistics, and financial operations.

These firms allow the network to maintain a steady flow of vessels, crews, and cargoes while masking ownership and shielding transactions from scrutiny.

The structure reflects a broader evolution in the shadow fleet model, where ships are only one piece of a larger system designed to survive sanctions pressure.

Blockade Brings Enforcement to Sea

While Treasury tightens the financial vise, the Pentagon is enforcing pressure on the high-seas.

Vessels Mentioned

Original Article: Maximum Pressure Returns: U.S. Targets Shadow Fleet Tankers as Iran Oil Waiver Expires — Gcaptain