Hormuz Tanker Attacks Push Oil Above $100

10 September 2026

Executive Summary

The maritime-security situation around the Strait of Hormuz has deteriorated materially again after the largest wave of reciprocal attacks on commercial shipping since the current US-Iran conflict began.

Iran said on Wednesday that it had attacked 10 vessels near the Strait of Hormuz after the United States sank five Iranian oil tankers.

Separately, a Panama-flagged tanker carrying approximately 2 million barrels of Iraqi fuel oil was struck by a drone in Iraqi waters.

The vessel caught fire but Iraqi officials reported:

• No crew casualties.
• No cargo leakage.
• Only limited hull damage.

UK Maritime Trade Operations has also reported multiple merchant vessels subjected to disabling fire in the Northern Arabian Gulf and Gulf of Oman as part of ongoing military activity.

Iranian claims concerning every vessel allegedly attacked have not all been independently verified.

That distinction remains essential.

But the commercial picture is now clear.

Observed commodity-vessel movements through Hormuz fell to seven on Wednesday, down from 12 on Tuesday and well below the recent 10-day average of 14.

No LNG tanker was recorded leaving the Strait in that dataset.

Brent crude has consequently moved above $100 per barrel, trading around $101 early Thursday.

The issue is therefore no longer simply whether Hormuz is technically open.

Commercial vessels are operating inside an active military-risk environment in which tanker traffic itself is increasingly being targeted.

UK Impact

UK businesses may face consequences through:

• Higher oil prices.
• Higher diesel prices.
• LNG-price volatility.
• Marine war-risk premiums.
• Cargo insurance costs.
• Chartering costs.
• Vessel shortages.
• Longer voyage times.
• Supplier surcharges.
• Petrochemical inflation.
• Higher road-freight costs.
• Higher manufacturing costs.

The insurance component is becoming particularly significant.

Industry executives report that cargo and war-risk insurance for Gulf voyages can now add millions of dollars to the cost of an individual transit.

That can materially alter the economics of cargo movements even where the shipment completes successfully.

UK businesses should therefore avoid assuming that freight quotations agreed before the latest escalation will remain economically valid.

Global Impact

Before the conflict, Hormuz carried roughly one-fifth of global oil and gas movements.

Current industry estimates suggest Gulf oil exports remain significantly below pre-war levels even after including so-called “dark crossings”, where tankers transit without transmitting normal AIS signals.

Those movements have helped maintain Gulf exports.

But they also create reduced transparency.

Businesses, insurers and commodity markets therefore have greater difficulty establishing:

• Actual vessel movements.
• Available capacity.
• Cargo location.
• Exposure concentration.
• Real-time supply levels.

That uncertainty itself carries a price.

The market is now placing an increasingly significant geopolitical premium on oil, insurance and freight.

Our View

Businesses with Gulf exposure should move beyond general monitoring and undertake voyage-specific review.

Companies should ask:

• Has the carrier reconfirmed the voyage?
• Is the nominated vessel still willing to transit?
• Has the war-risk premium changed?
• Who contractually pays that premium?
• Has the cargo insurer imposed new conditions?
• Are crew-security requirements changing?
• Could cargo move through an alternative Gulf port?
• Could an overland route avoid Hormuz?
• Would deviation breach delivery obligations?
• Can additional freight charges be passed through?
• Is emergency inventory sufficient?
• Are oil-dependent input costs hedged?
• Could higher fuel costs affect fixed-price contracts?
• Do force-majeure provisions address military interference?
• Is pollution or salvage exposure understood?
• Are counterparties financially capable of absorbing prolonged disruption?

The key change overnight is significant.

Hormuz is no longer merely experiencing restricted traffic.

Commercial shipping itself is now directly within the cycle of military retaliation.

Risk Indicator: SEVERE – HORMUZ, SHIPPING & ENERGY

Disclaimer

The information contained within these Market Alerts is provided for general market awareness and informational purposes only. It does not constitute financial, legal, investment, regulatory or insurance advice. Whilst every effort has been made to ensure accuracy at the time of publication using multiple reputable and independently verified sources, geopolitical events, legislation, regulation and market conditions may change rapidly. Readers should obtain appropriate professional advice before acting upon any information contained herein.

Invictus Risk Solutions LLP – Helping organisations stay ahead of emerging risks through informed insight and independent analysis.