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Iran shadow fleet tracker

Reference dashboard · 2026

Iran shadow fleet tracker — 2026 reference

Who moves Iranian oil, at what scale, using which evasion patterns, and how enforcement and Hormuz risk fit together — in plain language from open sources.

Last updatedSanctions × shipping cross-topic
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On this page

430+

Tankers linked to Iranian trades

Fleet-tracking composite; definition varies by source

180+

U.S.-listed vessels (cumulative)

OFAC / State designations; subset of global grey fleet

~62%

Share falsely flagged (U.S. claim)

Based on U.S. government vessel-class analysis releases

~1.5M bpd

Iran oil moved at peak grey-market estimates

Pre-2026 conflict windows; collapses when enforcement spikes

What this tracker covers

This hub compresses open-source consensus (and disagreement) about Iran’s grey-market tankers into one reference view: scale, typical evasion tactics, recent enforcement beats, and how the story ties to Hormuz shipping risk.

For narrative history, cases, and graphics, keep using the Market Intel article — this route is for fast alignment on definitions and orders of magnitude.

Four common evasion patterns

AIS dark periods
Ships go dark near load/discharge areas or during lightering. Gaps are not proof of sanctions busting but are a common risk flag used by insurers and coast guards.
Ship-to-ship (STS) transfers
Mid-ocean cargo swaps blend provenance and complicate documentation. STS clusters appear off Malaysia, the UAE coast, and in the east Mediterranean.
Flag hopping & shell ownership
Fleets cycle through small registers and single-ship companies. U.S. data asserts a majority of Iran-trade tonnage sails under flags that do not match beneficial control.
Documentation & blending
Bills of lading and lab samples can misstate origin or grade. Blending Iranian barrels with other crudes obscures assays for buyers that avoid direct Iran exposure.

Recent enforcement milestones (selected)

  • Dec 2025 — Treasury targeted dozens more tankers and managers in a tranche aimed at STS hubs serving Iranian barrels.
  • Feb 2026 — State announced additional listings focused on illicit traders and shadow-fleet operators tied to Iranian oil.
  • Ongoing — EU and UK lists overlap partially with U.S. actions; insurers still treat Iran voyages as high legal hazard.

Why Hormuz and oil risk premia matter

A grey-market fleet does not automatically mean conflict, but it raises the odds of detentions, forfeitures, and mishaps. Dense STS activity and slow steaming near Hormuz lift marine and insurance costs and can amplify market sensitivity to disruption headlines during tense periods.

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