Why Nucor shares are sliding today

Nucor shares dropped 3.8% in after-hours trading today after the Charlotte-based steel producer issued Q3 2026 earnings guidance. The company projected net earnings of $5.55 to $5.65 per diluted share for the quarter ending October 3, 2026, below the Wall Street consensus of $5.99. Although that range marks a substantial increase from the $2.63 per diluted share reported in Q3 2025, the guidance miss drove a sharp retreat from the session high of $268.08.

A major factor dampening investor sentiment is that two non-recurring items that lifted Q2 2026 results will not recur. These were a $61 million non-cash gain from a higher valuation of Nucor’s stake in fusion energy company Helion, and roughly $130 million in prior-period raw material procurement refunds that lowered cost of goods sold. Neither benefit is anticipated in Q3. In addition, the raw materials segment is expected to post lower earnings because of softer pricing and shipments, partly offsetting improvements in the steel mills and steel products segments.

The broader market offered little support for the decline: the S&P 500 was roughly flat, the Dow Jones edged higher, and the Nasdaq slipped slightly. The steel sector had already experienced some institutional repositioning, as Berkshire Hathaway significantly cut its NUE stake in Q2 2026. Peers Steel Dynamics and Cleveland-Cliffs face the same cyclical conditions, and the guidance miss highlighted persistent worries about margin durability while raw material costs remain high.

All told, the below-consensus Q3 outlook, the lapsing of one-time earnings boosts, and a neutral macro backdrop gave bulls little to rely on in after-hours trading. Shares fell to $255.16, still far above the 52-week low of $131.32 but down from the 52-week high of $280.11 set earlier this year.

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