**US-Iran negotiations over Iran's approximately 440 kg stockpile of 60% enriched uranium remain unresolved amid stalled follow-on talks after the June 2026 memorandum of understanding.** That interim accord established a 60-day window for a final deal that would address the material's disposition, with on-site down-blending under IAEA supervision as the minimum option, alongside sanctions relief and reopening of the Strait of Hormuz. IAEA inspectors have visited some sites but lack access to bombed enrichment facilities at Natanz, Fordow, and Isfahan, preventing verification of the stockpile's location or condition. Recent satellite imagery shows Iranian construction and fortification at underground sites like Pickaxe Mountain, while Israeli officials have signaled readiness for renewed strikes if red lines are crossed. These factors sustain uncertainty over whether the United States will secure physical removal or control of the material.