United Microelectronics Corporation, Taiwan’s second-largest contract chipmaker, announced the first mass-production wafer delivery of photonic integrated circuits from its Singapore 12-inch fab on July 14. The wafers were built in partnership with SILITH Technology, a Singapore-headquartered fabless silicon photonics company whose 1.6T platform has already shipped more than 8 million 100G and 200G-lane PICs. The two firms took the platform from development to production readiness in 18 months, and a leading cloud infrastructure customer has already qualified it for volume deployment.

KeyBanc’s John Vinh raised his Marvell price target to $385 from $260 on Thursday, a 48% increase, and kept his Overweight rating. The headline number is large. The argument behind it is more interesting, because it inverts the hierarchy that has carried the stock for two years.

For most of the AI cycle, Marvell has been priced as a custom-silicon story. The thesis was the XPU pipeline: bespoke accelerators for AWS and Microsoft, a clear line of sight to roughly $10 billion in custom-chip revenue by fiscal 2029, and a seat at the table next to Broadcom in the ASIC duopoly. Networking was the supporting act. Vinh has now promoted it to lead. He came out of recent investor meetings calling networking the most durable growth opportunity Marvell has, and put a number on the scale-up market — optical links, silicon photonics, and high-speed switching — of around $30 billion by 2030.

Lumentum (NASDAQ: LITE) and Coherent (NYSE: COHR) are the two Western names every AI-optics conversation eventually circles back to. Both have been pulled out of telecom-cyclical obscurity and re-rated into large-caps by the same force: NVIDIA’s data-center buildout and its need to move colossal amounts of data between accelerators with optics instead of copper. Both took a $2 billion equity investment from NVIDIA in March 2026, the identical capital-plus-purchase-commitment template, on the same day the company committed to locking in its photonic supply chain.