Shares of Insteel Industries (NYSE: IIIN) soared 6.85% in pre-market trading on Thursday following the release of its impressive second-quarter 2025 financial results. The largest manufacturer of steel wire reinforcing products for concrete construction applications in the United States reported earnings that significantly exceeded analyst expectations, driving investor enthusiasm.

Insteel reported quarterly earnings of $0.52 per share, a substantial increase from $0.35 per share in the same period last year. This figure handily beat the analyst consensus estimate of $0.27 by 103.7%. The company's net sales for the quarter reached $160.7 million, up 26.1% from $127.4 million in the prior-year quarter and surpassing the analyst estimate of $149.85 million by 7.21%.

The strong performance was attributed to recovering demand for the company's concrete reinforcement products, lower unit manufacturing costs on higher production volume, and contributions from recent acquisitions. Insteel's President and CEO, H.O. Woltz III, expressed optimism about the company's outlook, stating, "We are encouraged by the strengthening demand for our products that began during our first quarter. The positive momentum we experienced through our second fiscal quarter was driven by improving business conditions and rising customer confidence."