Tower Semiconductor's stronger-than-expected capacity expansion lets it fill more optical-chip orders itself, reducing customers' incentive to move to foundries they regard as technologically weaker. Its hybrid bonding packs dense connections between photonic chips and their driver electronics, an advantage viewed as effectively unmatched among Western suppliers. Tower remains one of the highest-conviction holdings despite the portfolio trim. x.com 

Tower Semiconductor is becoming to photonics what TSMC is to GPUs: a foundry building the next AI stack. It fabricates silicon photonics chips that combine lasers, modulators and detectors on one platform, and is integrating Lightwave Logic into that platform right after massive AI optical spending. As AI networks scale to 800G and 1.6T, photonics becomes the next bottleneck, with limited supply and exploding demand. x.com 

Rising 1.6T switching demand favors optical suppliers, though their execution risks vary. Bank of America says the market could grow ~101% annually through 2030. Marvell's leading DSPs and Lumentum's supply-short 200G EML lasers are lowest risk; Applied Optoelectronics' capacity expansion and Fabrinet's customer concentration make them medium risk. Aeluma remains pre-commercial, while Lightwave Logic's polymer modulators are a high-risk moonshot despite its TSM partnership. x.com 

Tower Semiconductor's earnings call carried strong commentary, and the stock's steady performance makes it a calmer holding than Nebius. Its year-to-date and one-year trend show a steep angle of ascent, suiting an investor who cannot watch the screen all day. Proceeds from exiting Nebius go to Tower, with another third to be added. x.com  x.com 

Tower Semiconductor is building the foundry that silicon photonics needs, alongside its power management business, and its chart is flashing a blue buy signal again. x.com 

Tower Semiconductor looks set to be the leading silicon-photonics foundry as the path to CPO runs through NPO. First NPO deployments are planned for 2027, with $1.3B of contract value for 2027 alone and more after. A multi-year IQE epi-wafer deal protects it from the InP bottleneck, it is bringing laser-to-silicon bonding in-house, and a dual-track 300 mm plan in Japan aims to quadruple capacity without dilution. Its SiPho coherent modules for Marvell have passed multi-million units. x.com 

Tower Semiconductor is the only foundry besides TSMC with production-ready silicon photonics at scale. Every 1.6T optical module going into AI data centers needs Tower's wafers, and 70% of its capacity through 2028 is already secured. x.com 

Tower Semiconductor is a silicon photonics foundry behind the AI optical stack, and the market will price it for where its revenue mix is going. Its silicon photonics revenue doubled in 2025 on hyperscaler demand, more than 70% of capacity is booked through 2028, and it is partnered with Nvidia on next-gen optical modules. As @joedab12 noted, it is not a pure play yet: silicon photonics is still a minority of revenue, but the fastest-growing piece. x.com  x.com 

Tower Semiconductor's silicon photonics ramp is running ahead of schedule, per Wedbush, pulling it into a better revenue and margin mix from AI datacenter optics. Q1 revenue beat, gross margin hit 26.8%, and about $290 million of prepayments back $1.3 billion of contracted 2027 SiPh revenue, which management calls a floor. Wedbush sees CPO share shift as a risk from 2028 at the earliest. It raised its target to $300 from $140 but stays Neutral, seeing the good news as increasingly priced in. … Show more

Tower Semiconductor's silicon photonics is shifting from future optionality to a production ramp, making it a merchant SiPho foundry tied to AI optical connectivity rather than a legacy analog foundry. With NewPhotonics, it began high-volume shipments of laser-integrated optical engines on its PH18DA platform for 800G and 1.6T, putting lasers, amplifiers, modulators and detectors on one chip to cut assembly complexity. A 6.4T near-packaged optics chipset targets volume shipments in 1H27. x.com