Silicon Photonics Transforms Tower’s Business Model

3 November, 2026

Its rapidly growing silicon photonics business now accounts for nearly half of the company's revenue. Its investments are increasingly focused on SiPho

Tower Semiconductor reported record revenue of $526 million in the third quarter of 2026, representing 33% growth compared with the same quarter in 2025. Gross profit nearly doubled, reaching a record $179 million, up 92% from $93 million in Q3-2025. Operating profit reached a record $127 million (excluding non-recurring items) – 2.5 times the $51 million reported in the corresponding quarter last year. The company provided revenue guidance of $600 million for the fourth quarter of 2026, representing 36% year-over-year growth.

Tower’s CEO Russell Ellwanger said the company is entering the strongest growth phase in its history. “We expect to close 2026 with approximately $2 billion in annual revenue.” According to Ellwanger, the company is reaching an annualized revenue run rate of $2.4 billion, assuming quarterly sales in 2027 remain at least at the level projected for Q4-2026. “We aim to enter 2027 without the typical first-quarter seasonality decline, experienced by the industry. We already have clear visibility into continued sequential revenue growth.”

 

Tower’s New Growth Engine

Ellwanger explained that strong demand for silicon photonics (SiPho) and silicon germanium (SiGe) technologies is driving “exceptional growth” in the company’s high-speed connectivity business. “We are targeting an annualized revenue run rate of $1.1 billion from SiPho alone in the fourth quarter, five times our annual SiPho revenue in 2025.” In effect, this implies quarterly silicon photonics revenue of approximately $275 million in the final quarter of 2026, accounting for about 45.8% of Tower’s total revenue.

Tower is already close to achieving this target. During Monday’s earnings conference call with analysts, Ellwanger revealed that silicon photonics revenue had already reached approximately $240 million in the third quarter, representing 45.6% of total sales. This suggests that Tower is gradually evolving from a specialized analog semiconductor foundry into a strategic manufacturing partner for the optical communications industry in the AI era, without abandoning its traditional businesses.

The transformation could also have implications for the company’s valuation. If investors become convinced that SiPho demand represents a long-term structural trend rather than a temporary investment cycle, they may increasingly view Tower less as a traditional cyclical semiconductor manufacturer and more as a technology supplier positioned for sustained growth.

On the other hand, this shift could weaken one of Tower’s traditional strengths: its diversification across multiple end markets. As silicon photonics becomes a larger part of its business, the company is becoming increasingly exposed to AI infrastructure investment cycles and the optical communications market.

The transition is taking place gradually. Ellwanger explained: “Our ongoing investments in manufacturing capacity expansion, including the previously announced Track-1 project to expand 300mm wafer manufacturing capacity in Japan, are progressing ahead of schedule. These investments are supported by customer contracts extending through 2029, giving us strong confidence in our ability to achieve our 2028 revenue and margin targets.”

Ellwanger was apparently referring to the company’s announcement in May 2026, when Tower reported that it had secured approximately $1.3 billion in contracts from major customers for SiPho product deliveries in 2027. The company also received approximately $290 million in customer prepayments to reserve manufacturing capacity.

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Posted in: News , Semiconductors

Posted in tags: semiconductors , Silicon Photonics , Tower Semiconductor

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