Michael A. Lewis, a director at NPK International Inc., sold 2,013 shares of common stock on August 17, 2026, for approximately $28,705, according to regulatory filings.
The transaction was executed at a weighted average price of $14.2599 per share, with prices ranging from $14.15 to $14.40. The sale was conducted under a Rule 10b5-1 trading plan adopted by Lewis on March 7, 2025, a mechanism designed to pre-arrange trades during periods of non-material nonpublic information.
Following the disposal, Lewis retains a direct ownership of 135,865 shares in NPK International. The stock declined to $13.16 on the day of the sale, down from the director's average disposal price.
NPK International reported adjusted earnings of $0.15 per share in the second quarter of 2026, exceeding Wall Street estimates of $0.13. Revenue reached $82 million, surpassing the projected $79.65 million, while adjusted EBITDA rose 37% year-over-year, driven by strong demand in utility and critical-infrastructure markets.
InvestingPro, a financial analysis platform, lists NPK International among its "Most Overvalued stocks" with a P/E ratio of 28.5 and a PEG ratio of 0.22, though the platform also provides seven additional analytical insights for further evaluation.













