MediumVI Energy Politics & Supply Security21 October 2026, Wednesday
US hits Iran's shadow fleet through a law firm this time
On 21 October the US Treasury sanctioned Karnakis and Karnakis, a law firm based in Panama and Greece, together with 5 linked individuals, 3 maritime companies and 9 vessels. According to Newsquawk, the sanctioned ships have been given 30 days to wind down their business.
gCaptain reports that the designations fall under Operation Economic Exclusion, launched on 24 August. The list includes 7 Panama-flagged dry bulk carriers operated by Roxette Maritime and 2 UAE-flagged support vessels of Dubai-based Whales Shipping Line. Singapore-based agent Amigoz was also listed. The Treasury says the firm set up front companies to hide vessel ownership, and that 3 of the 7 ships carried Iranian-origin cargo in the past year.
According to JNS, a company linked to Whales arranged purchases of Iranian petrochemicals worth tens of millions of dollars. Treasury Secretary Bessent kept it brief. "If you support the Iranian regime, we will find you and sanction you," he said. On 21 October FinCEN, the Treasury's financial crimes unit, issued its first administrative subpoena concerning a Greek bank's Iranian links. Newsquawk says the 30-day wind-down licence covers only non-Iranian cargo and bars deliveries to Iran and Russia. Crude hit its session low on the news on 21 October.
Washington also moved in the opposite direction that week. Citing Bloomberg, gCaptain reports that Energy Secretary Wright said on 20 October that blacklisted tankers could be sold and return to the legitimate fleet. Oil Brokerage estimates that about 70% of the 294 tankers under sanctions not mirrored by the EU or the UK are over 20 years old. Of the 75 commercially usable ships, 50 are supertankers. A supertanker on the Hormuz shuttle can earn up to 40 million dollars per voyage.
Talay assessment
Bottom line
The new round targets not Iran's crude exports, which are already at zero, but the intermediary network moving LPG, petrochemicals and dry bulk. The same week Washington proposed returning sanctioned tankers to the legitimate fleet through sales. The aim is to cut Iran's revenue while bringing tonnage back to the market. The most likely path is sanctions widening into the legal and financial layer, with tanker conversion staying slow.
Likely effects
- Iran's non-crude revenueNegative1–6 months
Petrochemical intermediaries and the law firm that set them up are now targeted; the subpoena aimed at a Greek bank also narrows the financial channel.
- Tanker supplyPositive1–6 months
Oil Brokerage says 75 sanctioned tankers are usable, 50 of them supertankers; if conversion works, the tight supertanker pool widens.
- Regional agentsNegativeWeeks
With intermediaries in Panama, Singapore and Dubai now listed, secondary sanctions risk will make agents and banks more cautious.
Possibilities, ranked
- 1Sanctions net widens, conversion stays slow60%
The Treasury lists new intermediaries each week; old shadow tankers cannot rejoin the legitimate fleet without EU and UK insurance.
Watch: The Treasury's next Economic Exclusion list and the first completed sale of a sanctioned tanker
- 2Tanker conversion accelerates25%
Sold ships are insured under new owners and join the Gulf shuttle.
Watch: The EU and UK removing the same vessels from their own lists
- 3A deal eases sanctions15%
Mediation produces an understanding and the sanctions timetable is suspended.
Watch: The US formal response to Iran's 7-day Hormuz plan
Probabilities are calibrated judgement based on the sources, not measurement, and are revised as new information arrives. Not investment advice.
Market reaction
Indicators affected
- Sanctioned vessels▼ 9
- Wind-down period▼ 30 days
- Usable sanctioned tankers▲ 75