Tower’s surge continues as valuation crosses $20 billion mark
Once overlooked, the company is now central to investor expectations around AI.
Four years ago, Tower Semiconductor was nearly sold to Intel for $5 billion. On Thursday, it crossed a $20 billion valuation for the first time, after a sharp rally that reflects a fundamental shift in how investors view its business.
Shares of the Israeli chipmaker surged nearly 15% on the final trading day of the week, shortened by the Good Friday holiday, lifting its market capitalization to approximately $22 billion. The move caps an extraordinary run: Tower’s stock has risen nearly 60% over the past month and is up roughly 525% over the past year.
The scale of that revaluation is striking not only in absolute terms, but also in how quickly it has unfolded. A company once viewed as a niche semiconductor manufacturer is now being reassessed as a central player in a rapidly evolving segment of the industry.
Investor attention has increasingly focused on silicon photonics, a technology long associated with specialized applications, but now gaining prominence as a potential cornerstone of artificial intelligence infrastructure.
The rally has come despite a highly unusual backdrop. During the war with Iran, missiles have been flying over Tower’s plant in Migdal HaEmek from both Lebanon and Iran. Yet the company’s shares continued to climb, suggesting that investors are looking past near-term geopolitical risks and instead pricing in longer-term structural demand.
At the core of this reassessment is a growing recognition of the limitations of traditional data transmission technologies. As data volumes within server farms expand and the demands of AI systems intensify, copper-based infrastructure is approaching its limits. Photonics, which enables data to be transmitted using light, offers a faster and more energy-efficient alternative.
Tower has spent years positioning itself for precisely this transition. The company has committed close to $1 billion to expanding its photonics manufacturing capacity, with a significant portion of that capacity already booked or in advanced negotiations. Most of the expansion is expected to be completed by the end of 2026.
The company has also outlined ambitious forward projections. It expects to double its revenue by 2028 compared with 2025, reaching $2.8 billion, while tripling net profit to $750 million. As early as 2026, roughly half of its revenue is projected to come from AI-related activity.
The demand for Tower's products was evident in its recent announcement that it was taking full ownership of a 300mm Fab 7 in Japan in order to meet orders.
For much of its history, Tower operated outside the spotlight, focusing on specialized manufacturing niches that attracted limited investor attention. The recent surge suggests that this positioning is being reinterpreted, as the technologies it invested in move closer to the center of the AI ecosystem.
