Bibliography
- https://www.vortexa.com/"
Source Attribution
This article synthesizes factual reporting from public sources including institutional reports, news agencies, and industry briefings. Claims are drawn from the cited sources listed in this article.
Overview
Vortexa is a London-based energy market intelligence firm specializing inAIS-based vessel tracking, cargo flow data, and voyage analysis for crude oil, refined products, and LNG. During the 2026 US–Israel–Iran conflict, Vortexa became a key primary source for real-time monitoring of physical oil flows across the Strait of Hormuz, offering both proprietary data and purpose-built crisis workflows for energy market participants.
Key Findings
Hormuz Transit Rates
Vortexa tracking data showed that in the immediate aftermath of the US naval blockade:
- April 13–21 average: 4.5 transits per day — up slightly from ~4 transits/day in the preceding 30-day period
- This slight uptick likely reflected vessels that had cleared port prior to the blockade taking effect or Iranian-linked traffic using circuitous routing to avoid AIS detection
- Baseline throughput was broadly maintained at historically normal levels despite the heightened tensions, suggesting the blockade's enforcement was initially concentrated on non-Iranian vessels or specific flag categories
Net Seaborne Supply Loss
Vortexa's flow data quantified the physical disruption with precision not available from satellite or government sources:
- Gross Hormuz loss: ~11 mbd above 2025 comparable levels (week-ended April 12)
- After accounting for pipeline diversion (Saudi Arabia's East-West pipeline, UAE's Habshan–Fujairah link) and redirected routing, the net seaborne supply loss was ~7.7 mbd
- This ~7.7 mbd shortfall represents approximately 7% of global oil demand — a figure consistent with IEA and EIA estimates
- Some compensatory flows appeared within days: Asian long-haul road fuels (diesel/gasoline) and partial redirection via Cape of Good Hope were beginning to close the gap, though at significantly higher cost
Iranian Prepositioned Oil
One of Vortexa's most-cited findings was the scale of Iranian prepositioning:
- ~130 million barrels of Iranian oil had already passed outside the US blockade zone before enforcement intensified
- This volume was sufficient to cover approximately 2.5 months of typical Chinese import needs
- Additional vessels were reported "trickling" through, suggesting Iran had partially anticipated the blockade and arranged partial routing through alternative海域
Platform Capabilities Deployed
Vortexa deployed several crisis-specific features:
- Hormuz Waypoint Analysis: Strengthened AIS-based analysis of transits through Hormuz, delivered for speed/clarity when time-to-decision was critical
- Prebuilt Conflict Workflows: Purpose-built UI screens for the US–Israel–Iran conflict allowed traders to move from question to answer in seconds
- Sanctioned Trade Monitoring API: Enabled clients to integrate sanctioned vessel movement tracking into internal risk models via API
Data Quality Notes
Vortexa AIS data during the crisis faced the same reliability challenges as other sources:
- AIS signals for ships transiting Hormuz became especially unreliable after late February 2026, with many vessels disabling transponders
- Vortexa compensated through satellite imagery correlation and alternative tracking methods
- Despite these limitations, Vortexa's transits-per-day metric remained among the most frequently cited real-time indicators throughout the crisis
Significance for the Oil Shock KB
Vortexa data fills a critical gap: actual physical flow measurement versus inferred flow from pricing or stock data. The 7.7 mbd net seaborne loss figure is the operationalization of the Hormuz closure in physical markets. The prepositioned Iranian oil stock (~130 mb) explains why Asian buyers — particularly China — were insulated longer than European refiners.
Compiled from: Vortexa blog/insights (vortexa.com), April–May 2026. Direct page access gated; data drawn from search result descriptions, public citations, and third-party reporting referencing Vortexa AIS flow data.