Shares of National Presto Industries, Inc. (NPK) have declined 5.4% since the company reported its earnings for the quarter ended Sept. 28, 2025. This compares to the S&P 500 index’s 2.3% growth over the same time frame. Over the past month, the stock has declined 6.2% compared with the S&P 500’s 2.9% growth, underscoring a period of underperformance relative to the broader market.For the third quarter of 2025, National Presto reported earnings per share (EPS) of 74 cents, which dropped from $1.13 a year ag ...