Nucor stock falls on weaker than expected third quarter guidance

Nucor shares declined on September 17 after the company gave third-quarter guidance that fell short of expectations. The report establishes a negative near-term earnings signal, but no further guidance figure or management explanation is available here to quantify the gap or identify the affected operating segments.

Nucor last reported fiscal-year revenue of $32.5 billion for the year ended December 31, 2025, up 5.7% year over year, with a 5.4% net margin and diluted EPS of $7.52. Those annual figures provide context for the scale of the business but do not establish the size or duration of the current-quarter pressure.

The direct exposure is Nucor’s earnings and steelmaking operations: weaker guidance can affect expected sales, margins and per-share results if realized demand or pricing remains below plan. The share-price reaction shows the market is treating the guidance as a deterioration in the near-term outlook.

The extent of the reset remains uncertain because the reported guidance range, the prior outlook and the underlying driver were not specified. The next results and any updated outlook will be the clearest tests of whether the shortfall is confined to the third quarter or carries into subsequent periods.