On July 21, Tower Semiconductor rose 6.66% in regular trading, trading at $241.08/share, with turnover of $52.52 million. A broad-based semiconductor sector rally served as the primary driver, with the company's ongoing Japan expansion catalyst providing additional support.

On the news front, the semiconductor sector witnessed collective strength, with peers SK hynix up 9.09%, Micron Technology up 8.54%, Intel up 6.36%, and Advanced Micro Devices up 6.24%. The sector-wide momentum extended the recovery trajectory for Tower Semiconductor, which announced on July 14 a $4 billion dual-track expansion plan in Japan — including a $1 billion grant from Tokyo — to significantly scale its 300mm silicon photonics, silicon germanium, and advanced packaging capacity. The company simultaneously raised its 2028 targets to $3.6 billion in revenue and $1.2 billion in net profit, up from the prior $2.8 billion and $750 million respectively. Wedbush subsequently highlighted the stock as undervalued, citing silicon photonics expansion as unlocking AI infrastructure growth. The combination of sector resonance and fundamental catalysts continues to underpin the stock's upward trajectory.

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