Why Tower Semiconductor Soared in May - Yahoo Finance

Tower Semiconductor's stock surged 15.5% in May 2026, driven by strong first-quarter earnings and significant customer orders. The company reported a 15.6% revenue increase to $414 million and adjuste... Read original →

Tower’s May surge signals silicon photonics’ inflection point in AI infrastructure. The $1.3B contracts reflect a systemic shift away from copper interconnects, forcing EUV toolmakers to adapt lithography for sub-3nm photonic integration and pushing OSATs to overhaul CPO packaging lines. While U.S. CHIPS Act incentives favor specialty foundries, Tower’s dual manufacturing bases in Israel and Japan mitigate geopolitical risk but face export control bottlenecks on advanced tools. Competitors like TSMC and GlobalFoundries will likely accelerate PDK ecosystem openings to secure second-source roles for AI chip clients. Within 18 months, silicon photonics transitions from optional to essential—justifying Tower’s 70x forward P/E as a bet on its role in defining the optical I/O standard for next-gen AI hardware.