Marvell Deepens AI Infrastructure Push With GlobalFoundries, Microsoft, Utimaco Deals

Meta announced Petal on Sept. 21, a roughly 4,300-mile subsea cable connecting the U.S. and France that is expected to enter service in 2029 and will be the first to deliver petabit-scale capacity across an ocean. The cable will carry 1 petabit per second, or about 125,000 gigabytes per second, double what today's most advanced transoceanic cables can handle, using two-core fiber that fits two light paths inside each strand. Petal is one piece of a much larger seafloor empire: Meta says it has invested in more than 20 subsea cable projects touching every continent except Antarctica, led by Project Waterworth, announced in February 2025, which will stretch more than 31,000 miles and connect the U.S., Brazil, South Africa, India, and other regions across five continents. Petal is being developed with Japan's NEC and Sumitomo Electric Industries, with French telecom Orange handling the landing on France's Atlantic coast, while Waterworth will be wholly owned by Meta, only its third solely owned cable according to telecom research firm TeleGeography. Meta has not disclosed what Petal or Waterworth will cost, but TechCrunch reported before Waterworth's announcement that the project could top $10 billion, a small slice of the company's expected capital expenditures of $130 billion to $145 billion this year, nearly double the $72.2 billion it spent in 2025.

Coherent shares jumped 10.5% in the afternoon session after Bernstein rated the materials and photonics company Outperform with a $350 price target, citing optical-module upside as data-center switches move to higher speeds. According to Streetinsider, Bernstein framed $350 as roughly 24% upside, valuing the stock at 22 times estimated 2028 earnings per share of $16, and argued optical-module demand should keep expanding with faster networking gear. Citi commentary tagging Coherent as an AI hardware beneficiary reinforced the bullish AI-infrastructure read-across, alongside investor focus on Coherent's PhotonLink optics platform and an AI security demo amid a broader bid in networking names. The move follows a 5.2% gain two days earlier on news that Coherent demonstrated scalable physical-layer security for artificial intelligence infrastructure developed alongside CUbIQ Technologies. Coherent is up 63.1% since the start of the year, but at $317.01 per share it still trades 25.7% below its 52-week high of $426.89 from June 2026.

Optical networking stocks rallied Thursday after Bernstein initiated coverage of the group with an Outperform rating, calling the companies structural AI winners. Coherent jumped 11%, Lumentum rose 7%, Ciena gained 7%, and Arista added 0.4%. Coherent led the move after launching PhotonLink, an optics platform for AI infrastructure that packages its services, photonics technologies, and components including lasers, fibers, and detectors into one platform for AI data centers. The company said it already has 20 customer engagements split between co-packaged optic and near-packaged optic assemblies, plus five engagements in emerging chip-to-chip connectivity. The gains extend a strong 2026 rally for the group, with Coherent up 73%, Lumentum up 183%, Ciena up 62%, and Arista up 56% year to date.

Volantis, a semiconductor company building a new category of AI inference system, announced an $88 million Series A co-led by Lachy Groom and Abstract Ventures, with participation from John Doerr, VXI Capital, Triatomic and Susa Ventures, plus angel investors Dwarkesh Patel, Naveen Rao and Sholto Douglas. The company's first system, A-1, is being designed to run models exceeding 20 trillion parameters at up to 10,000 tokens per second per user while reducing inference cost per token. Volantis says A-1 will increase memory capacity and bandwidth simultaneously by nearly two orders of magnitude, using a photonic interconnect that connects compute chips to memory and aggregates the bandwidth of large numbers of memory chips into a unified pool. The architecture uses custom micro-VCSELs rather than external lasers, drawing on the existing gallium arsenide VCSEL supply chain and avoiding indium phosphide supply constraints, with end-to-end links consuming less than one picojoule per bit. The financing will support development and commercialization of A-1 and its photonic memory architecture, including expanding the engineering team, and Volantis plans to deliver its first integrated inference engines to customers in 2027.

CScale exited stealth, announcing $145 million in Series C funding to accelerate development and commercialization of optical interconnect for AI scale-up, bringing the company's total funding to $188 million. The round was co-led by Atreides Management, Valor Equity Partners, and Premji Invest, with Sutter Hill Ventures continuing its support alongside existing investor Maverick Silicon. NVIDIA and Intel Capital joined as CScale's first strategic investors. The Palo Alto company is architecting its interconnect to contain optical failures without interrupting compute, targeting the gigawatt-class AI data centers expected by the end of the decade, where a single scale-up domain will span thousands of tightly coupled accelerators across dozens of racks. CEO Martin Lund said lasers will fail but compute should not, and Atreides Management Managing Partner and Chief Investment Officer Gavin Baker said every optical failure is a compute failure at that scale.