Timeline of U.S. sanctions on Iran during the 2026 conflict

February 6 2026

Secondary Tariff Authority Created Executive Order 14382 authorized additional tariffs on imports from countries continuing to purchase Iranian goods or services. Policy Iran Trade White House +

Principal Target Countries purchasing Iranian goods or services, especially large petroleum buyers.

Enforcement Tool Additional U.S. import tariffs, potentially reaching 25%.

February 25 2026

Shadow Fleet and Weapons Networks Targeted More than 30 individuals, companies and vessels were sanctioned over petroleum sales, shadow-fleet operations, missiles, UAVs and weapons procurement. Shipping Military U.S. Treasury +

Vessel Component Twelve shadow-fleet vessels and associated owners or operators.

Military Component Procurement networks supporting missiles, drones and conventional weapons.

February 28 2026

Current Conflict Baseline The United States and Israel began military operations against Iran. This date serves as the baseline for the conflict-period sanctions timeline. Conflict Start Timeline Marker +

This was not itself a sanctions designation. It marks the point at which the existing economic-pressure campaign became directly connected to active military conflict.

March 20 2026

Temporary Waiver for Oil Already at Sea Treasury issued a 30-day waiver covering Iranian oil cargoes already in transit. Temporary Relief Oil Cargoes U.S. Treasury +

Estimated Volume Approximately 140 million barrels were reportedly covered.

Market Function The waiver helped reduce immediate pressure on oil prices and buyers holding cargoes already at sea.

April 14–19 2026

Oil Waiver Ends and Full Enforcement Resumes Washington announced that the March waiver would not be renewed and warned financial institutions in several regional hubs. Enforcement Iranian Oil +

Warning Locations China, Hong Kong, the UAE and Oman.

Campaign Position The end of the waiver marked the start of the full wartime Economic Fury campaign.

April 15 2026

First Major Conflict-Era Designation Package More than two dozen people, companies and vessels connected to Mohammad Hossein Shamkhani’s oil-smuggling network were sanctioned. Oil Shipping Gold Finance U.S. Treasury +

The same action targeted schemes involving Iranian oil, gold transactions and financing connected to Hizballah.

April 17 2026

Iran-Aligned Militia Commanders Designated Seven commanders associated with major Iran-backed Iraqi militias were sanctioned. Militias Security U.S. Treasury +

Named Groups Kata’ib Hizballah, Kata’ib Sayyid al-Shuhada, Harakat al-Nujaba and Asa’ib Ahl al-Haq.

Alleged Activity Planning or directing attacks against U.S. personnel and facilities.

April 21 2026

Missile, UAV and Mahan Air Networks Targeted Fourteen individuals, entities and aircraft in Iran, Türkiye and the UAE were designated. Missiles Shahed UAVs U.S. Treasury +

The action covered ballistic-missile components, drone supply chains, weapons transport and companies or aircraft linked to Mahan Air.

April 24 2026

Chinese Refinery and 40 Shipping Targets Added Hengli Petrochemical’s Dalian refinery and approximately 40 shipping companies and vessels were sanctioned. Refinery Shadow Fleet U.S. Treasury +

The refinery was accused of purchasing billions of dollars of Iranian petroleum, while the shipping targets moved oil and petrochemical cargoes.

April 28 2026

Shadow Banking Crackdown and Hormuz Payment Warning Thirty-five individuals and entities were designated, while Treasury warned that payments connected to Hormuz passage could create sanctions exposure. Shadow Banking Hormuz U.S. Treasury +

Financial Network Exchange houses, shell companies and facilitators moving oil revenue into usable foreign currencies.

Maritime Expansion Owners, charterers, banks and insurers were warned about transactions connected to Hormuz passage.

May 1 2026

Foreign-Exchange Houses Targeted Three Iranian foreign-exchange houses and associated front companies were sanctioned. Currency Oil Revenue U.S. Treasury +

The networks allegedly converted oil revenue, including Chinese yuan, into currencies and assets usable by Iran’s military.

May 7 2026

Iraqi Oil Diversion and Militia Financing Network An Iraqi deputy oil minister, associated businesses and three senior militia leaders were sanctioned. Oil Diversion Militias U.S. Treasury +

Treasury said the operation generated revenue for Iran and armed groups operating inside Iraq.

May 8 2026

Weapons and UAV Procurement Networks Ten individuals and companies were sanctioned for supplying weapons, military materials and drone or missile components. Weapons UAV Components Treasury / State +

The State Department separately designated four additional arms-related entities.

May 11 2026

IRGC-Controlled Oil Sales to China Twelve individuals and entities were sanctioned for selling and transporting IRGC-controlled oil to China. Oil Shipping IRGC Revenue U.S. Treasury +

Overseas front companies were accused of concealing IRGC ownership and returning oil revenue to Iran.

May 19 2026

More Than 50 Companies, People and Vessels Added One of the largest wartime tranches targeted foreign-exchange, petroleum and petrochemical networks. 19 Vessels Foreign Exchange U.S. Treasury +

The shipping portion included vessels carrying Iranian oil, LPG and petrochemical products.

May 27 2026

Persian Gulf Strait Authority Sanctioned Iran’s newly created authority for managing and charging for Hormuz passage was designated. Hormuz Tolls IRGC Revenue U.S. Treasury +

Alleged Activities Charging vessels, collecting sensitive ship information and directing traffic toward an Iranian-controlled route.

Payment Exposure Tolls, cryptocurrency, swaps, donations, services or other benefits could create sanctions risk.

May 28 2026

Iranian Military Oil-Revenue Network Another network selling military-controlled Iranian crude was sanctioned. Crude Oil Military Funding U.S. Treasury +

The State Department also announced a reward of up to $15 million for information capable of disrupting IRGC financial mechanisms.

May 29 2026

Procurement Network Impersonating U.S. Businesses Iranian actors accused of impersonating and defrauding American companies were sanctioned. Procurement Fraud U.S. Treasury +

The network allegedly sought restricted goods for Iran’s Ministry of Defense and other sanctioned military end users.

June 2 2026

Iranian Cryptocurrency Exchanges Designated Nobitex and three additional Iranian digital-asset exchanges were sanctioned. Crypto Sanctions Evasion U.S. Treasury +

Treasury linked the platforms to sanctions evasion, capital flight and transactions associated with terror financing or military activity.

June 5 2026

Iranian LPG Disguised as Omani Cargo A network accused of selling Iranian LPG under false Omani-origin documentation was sanctioned. LPG Shipping Front Companies U.S. Treasury +

The action covered traders, vessels, front companies and bank accounts connected to shipments reaching South and East Asia.

June 10 2026

Foreign Military-Procurement Networks Nine individuals and entities supporting procurement for the IRGC and Iran’s Ministry of Defense were sanctioned. Weapons Procurement Financial Transfers Treasury / State +

The targets included China and Hong Kong-based actors connected to weapons acquisition, MANPADS efforts and clandestine finance.

July 10 2026

Supreme-Leader Financier and Exchange Houses Financier Ali Ansari, his international asset network and exchange houses accused of moving billions were targeted. Elite Finance Exchange Houses U.S. Treasury +

Treasury said the network benefited Mojtaba Khamenei, other regime elites and the IRGC.

July 14 2026

Major Shamkhani Shipping Crackdown More than 50 individuals, entities and vessels connected to Mohammad Hossein Shamkhani were sanctioned. Shipping Commodities U.S. Treasury +

Expanded Activities Oil tankers, container shipping, Caspian cargoes, commodities, foreign exchange and Russian petroleum.

Cumulative Network Treasury said more than 200 targets operating under Shamkhani’s patronage had been sanctioned.

July 15 2026

IRGC International Procurement Network Seven individuals and entities using aviation, transport and financial channels were sanctioned. IRGC Weapons Movement U.S. Treasury +

The network allegedly procured weapons and moved personnel using aviation companies, transport firms and financial conduits.

July 24 2026

Babak Zanjani and Dot One Network Four individuals and nine entities connected to sanctioned Iranian financier Babak Zanjani were designated. Money Laundering Digital Exchanges U.S. Treasury +

The network included transport, infrastructure, gold, diamonds, airlines, railways and the Zedcex and Zedxion digital exchanges.

July 29 2026

Insurers, Hormuz Service Companies and Eight Tankers The latest verified package targeted 10 entities and eight tankers, including six China-based companies. Tankers Marine Insurance Hormuz Services +

Reported Targets Persian Gulf Marine Insurance Company, HormuzSafe Marine Services Authority and oil-shipping facilitators.

Campaign Focus Iran’s ability to raise money through shipping, insurance and service arrangements connected to Hormuz passage.