Iran’s Enriched Uranium Stockpile Grows Before Israeli Strike

A confidential report from the International Atomic Energy Agency (IAEA) indicates that Iran significantly increased its stockpile of enriched uranium just prior to Israel’s military attack on June 13, 2025. According to the report, Iran possessed a total of 440.9 kilograms of uranium enriched to 60% as of that date, marking an increase of 32.3 kilograms since the IAEA’s previous report in May.

The findings come from a combination of information provided by Iran, IAEA verification activities conducted between May 17 and June 12, and estimates based on past operations at relevant facilities. The uranium enriched to 60% is only a short technical step away from weapons-grade levels of 90%.

Concerns Over Inspections and Cooperation

The report highlights ongoing tensions between Iran and the IAEA following Israel’s military actions. It states that no agreement has been reached regarding the resumption of inspections at sites impacted by the bombings. Since the conflict began, the only facility inspected has been the Bushehr Nuclear Power Plant, which operates with Russian technical assistance.

IAEA Director General Rafael Grossi emphasized the urgency of resuming inspections, stating that “technical modalities to enable the full resumption of agency inspection should be concluded without delay.” The report expresses concern over Iran’s decision to limit cooperation following the withdrawal of UN inspectors due to security issues during the war. This withdrawal was deemed necessary, but the lack of cooperation since is described as “deeply regrettable.”

As of June 13, Iran’s total stockpile of enriched uranium reached 9,874.9 kilograms, reflecting an increase of 627.3 kilograms since May. The IAEA noted that it has been unable to conduct in-field verification activities for over two and a half months, raising alarms about Iran’s near bomb-grade stockpile.

The agency pointed out that approximately 42 kilograms of uranium enriched to 60% could potentially be used to produce one atomic bomb if further enriched. The situation has become a matter of “serious concern,” particularly given the inability to verify Iran’s declarations regarding its nuclear activities.

The IAEA’s report underscores the complexities surrounding Iran’s nuclear program and the increasing international scrutiny as tensions escalate in the region. As diplomatic efforts continue, the implications of Iran’s enriched uranium stockpile and its potential uses remain a focal point for global security discussions.