Three Small-Cap Stocks Hit All-Time Highs Amid Data Center and Infrastructure Demand

Small-cap companies AXT Inc., NWPX Infrastructure, and Arteris Inc. have reached new all-time highs in 2026, driven by surging demand for data center infrastructure and water system upgrades. AXT Inc., a semiconductor wafer manufacturer, saw its stock rise nearly 600% year-to-date due to strong sales of indium phosphide substrates essential for AI data centers. Despite nearing profitability and holding a significant backlog, high valuation metrics suggest potential short-term volatility. NWPX Infrastructure benefited from long-term U.S. water infrastructure spending needs, reporting record revenue and earnings while maintaining a low debt profile and attractive valuation multiples. Arteris Inc., a semiconductor intellectual property provider, also surged on the back of AI training workloads and its high-margin licensing model. Analysts note that while the long-term growth trends for these sectors remain robust, investors should exercise caution regarding entry points due to technical indicators showing mixed signals for AXT and general small-cap volatility. The article evaluates whether to take profits or hold positions based on individual risk tolerance and fundamental strength.