Lumentum: Supply Can't Keep Up With Demand, and NVIDIA Has Already Locked Up Most of It
J.P. Morgan 54th Annual Global Technology Conference — Fireside Chat, May 18, 2026
Lumentum CEO Michael Hurlston spent the better part of an hour at J.P. Morgan's annual tech conference making one thing abundantly clear: the company's single biggest constraint is not demand, not technology, and not customer interest. It is the physical inability to manufacture fast enough. That admission, delivered with unusual candor, was the defining theme of a conversation that also surfaced meaningful new details on NVIDIA's supply lock-up, the transceiver margin problem, and a quietly accelerating OCS opportunity that has grown well beyond what the company outlined at OFC in March.
NVIDIA Has Locked Up a "Very Significant" Chunk of Lumentum's Indium Phosphide Capacity
The most consequential disclosure from the session was Hurlston's characterization of just how much indium phosphide capacity NVIDIA has already secured. "They moved very, very aggressively," he said. "They came in and they locked up a considerable amount of our supply. They locked up a considerable amount of Coherent supply." The CEO confirmed that NVIDIA holds options to take even more, leaving Lumentum scrambling to carve out room for other customers before those options are exercised. "We'd like diversity in the fabs," Hurlston acknowledged, "but you could see a world where NVIDIA ends up with all of it if they push hard."
With that backdrop, Lumentum is now racing to sign additional customers under similar structures — prepayments, pricing arrangements, and take-or-pay-style deals — before NVIDIA exercises its expansion rights. Hurlston was direct about the urgency: "Our job is to get deals locked up as quickly as we possibly can and to try to do so probably before next quarter." He was equally clear that the company does not need additional equity investment from another partner — the balance sheet is healthy enough — but prepayment and upfront pricing advantages are very much on the table in those conversations.
The Supply-Demand Imbalance Is Not Going Away — And May Widen
J.P. Morgan analyst Samik Chatterjee noted that Lumentum's EML output has grown roughly 8x since fiscal 2023, with another 50% unit ramp planned in the coming months, yet the supply-demand gap has widened to more than 30%. Hurlston did not push back on that characterization. His internal models suggest global indium phosphide capacity will increase 2x to 4x over the next several years, yet he expects a supply-demand imbalance to persist through that expansion. The reasoning: the scale of demand for optical scale-up — replacing copper interconnects inside and between AI clusters — represents an order of magnitude step-up from scale-out volumes. "For optical scale-out, we've said, okay, let's consider X, which is already big," he said. "If you then factor in scale up, it's somewhere north of 10x more that we're going to need. And again, we simply can't produce all that output."
Lumentum acquired its fifth indium phosphide fabrication facility earlier this year but does not expect production output from it for two years, illustrating the long lead times that make rapid capacity additions structurally difficult. Hurlston indicated the company is now seriously deliberating a sixth fab. On the technology roadmap, he offered a notable data point: at 3.2T speeds, silicon photonics is expected to fail due to noise constraints, forcing a return to EML-based transceivers. That means the demand pressure on indium phosphide does not ease as data rates increase — it compounds.
Greensboro 6-Inch Transition Is More Challenging Than Expected
One area where the CEO was refreshingly cautious was the 6-inch wafer transition. Six-inch indium phosphide wafers offer meaningful area efficiency gains over 4-inch — the Pi r-squared relationship is real — but the edge effects are pronounced and have caused significant problems for others attempting the same transition. Lumentum's strategy is to keep its legacy Japanese fabs on 4-inch to maintain stable, predictable output while building out the new Greensboro, North Carolina facility natively on 6-inch. Critically, all 6-inch tooling is 4-inch compatible, giving the company a retreat path. "I have to admit it's proving to be a lot more challenging than we might have expected," Hurlston said, a degree of candor not commonly heard on this topic.
Four Growth Drivers Have Barely Loaded Into the P&L Yet
At OFC in March, Lumentum set out a target of $2 billion in quarterly revenue at 40% operating margins within 18 to 24 months. June quarter guidance implies the company is already roughly halfway to that revenue number, and Hurlston was emphatic that the company's four primary growth vectors — OCS, optical scale-out, optical scale-up, and transceivers — have not yet contributed meaningfully to reported figures. OCS and optical scale-out are expected to ramp more substantially beginning in the fourth calendar quarter of 2026. Optical scale-up is expected to be a major earnings driver in 2027 through 2029. The transceiver business, which Hurlston called "the underappreciated part of the portfolio," is expected to roughly double revenue over the next four to five quarters as Lumentum finds itself first to market on 1.6T for the first time.
On what has changed since OFC, Hurlston pointed to three developments. First, the scale-out build-out has broadened significantly, with Ciena, Cisco, and Nokia all now citing multiple new customers for these deployments. Second, the transceiver business is seeing stronger-than-expected pull driven by the company's first-mover position on 1.6T. Third, co-packaged optics demand from Lumentum's largest customer has stepped up materially, particularly on scale-up applications — the inter-rack and cross-cluster connectivity that Hurlston believes will be the dominant financial driver in 2027 and 2028.
OCS Engagement Has Accelerated Beyond Revenue Recognition
The optical circuit switching business, which Hurlston described as the product of a ten-to-fifteen-year development cycle built on field-proven MEMS technology, is seeing a surge in customer engagement for new port counts, new configurations, and entirely new use cases. The most striking new application is in-rack traffic steering around failing GPUs — allowing compute clusters to route around hardware faults optically in real time. Lumentum confirmed it is actively engineering toward this use case. Hurlston was careful to note that this pipeline does not yet translate into confirmed design wins or near-term revenue, but the volume of customer engagements has "gone way up" since March, and the company is now working to define the right SKU set to address that demand.
Transceiver Margins Remain a Visible Weakness
The most candid portion of the conversation was on transceiver gross margins, where Hurlston's self-assessment was unflinching. He estimated that Coherent operates in the mid-30s on transceiver gross margins, while Chinese competitors InnoLight and Eopto operate in the mid-40s, perhaps low-40s on a like-for-like depreciation basis. Lumentum's own margins on transceivers are "not close to that." The company has begun integrating its own lasers and photonic ICs into its transceiver production — a vertical integration step that is helping, but the gap to peers remains wide. With the transceiver business set to double, this gross margin headwind will be a recurring feature of reported results for the foreseeable future. The aspiration is to close the gap with Coherent over time, but Hurlston was candid that the company is "trailing them quite significantly."
The Competitive Moat Is Real, But It Took Fifteen Years to Build
On the question of Chinese optical competitors eventually commoditizing Lumentum's key product lines, Hurlston's response was substantive. The relevant technologies — OCS, high-powered CPO lasers, narrow linewidth lasers — are not recent innovations. The co-packaged optics lasers being deployed today are derived from products originally qualified for undersea repeater amplifiers, dropped into the Mariana Trench, where reliability requirements are absolute. "If people started today, it would take multiple years for them to catch up on our core technologies," he said. The same logic applies to substrates and equipment — Lumentum confirmed it has locked up a long-term substrate supply agreement, though it acknowledged every incremental demand increase tightens that buffer. Equipment availability, particularly for reactors and etch tools in the fab, is an underappreciated secondary bottleneck that the CEO flagged explicitly.
Hyperscalers Will Not Enter the Component Business — But Watch Systems
Asked whether hyperscalers are building internal optical capabilities that could disintermediate component suppliers, Hurlston drew a clear line. NVIDIA and Google both have sophisticated optoelectronic engineering teams capable of architecting solutions and handing blueprints to contract manufacturers. But none are moving into laser manufacturing, laser drivers, or transceiver ICs. "As long as we stay on the component side of the business, I think we're in pretty good shape," he said. The risk, in his framing, exists only if Lumentum itself moves up into systems — where it would run into hyperscaler engineering teams directly. The OCS business, given its systems-adjacent nature, may eventually represent that boundary condition, but the company does not appear to be approaching it in the near term.
Lumentum Holdings Inc. Deep Dive
The AI Light Engine
Lumentum Holdings Inc. has undergone one of the most profound structural transformations in the global technology hardware sector. Historically viewed as a cyclical provider of optoelectronic components for the volatile telecommunications market, the company has successfully repositioned itself as the foundational photonic systems provider for the artificial intelligence supercycle. Lumentum makes its money through two primary segments: Components and Systems. In the Components division, the company designs, manufactures, and sells highly complex Indium Phosphide laser chips, specifically Electro-Absorption Modulated Lasers and Continuous Wave lasers. These chips serve as the core light-emitting engines for the entire optical transceiver ecosystem. In the Systems division, Lumentum sells fully assembled, high-speed optical transceiver modules and Optical Circuit Switches directly to the end users. The turning point for the company was the $750 million acquisition of Cloud Light Technology in late 2023. This masterstroke allowed Lumentum to vertically integrate, bypassing third-party module aggregators and moving directly into the business of selling 800G and 1.6T transceiver systems. By owning the raw Indium Phosphide laser technology and the final packaging capabilities, Lumentum now captures the full value chain of artificial intelligence data center interconnects, an evolution clearly reflected in its record-breaking fiscal third quarter 2026 revenue of $808.4 million.
Customers, Competitors, and the Ecosystem
Lumentum operates at the absolute epicenter of the generative artificial intelligence buildout, serving a highly concentrated but immensely capitalized customer base. The ultimate end customers are the Big-5 hyperscale cloud service providers, including Google, Amazon, Meta, and Microsoft, alongside specialized artificial intelligence compute pioneers. The ecosystem shifted seismically in March 2026 when Nvidia announced a $2 billion strategic investment and purchase commitment with Lumentum, cementing the company as the primary supplier for external light sources powering next-generation Co-Packaged Optics switch platforms. Competitively, Lumentum fights on two distinct fronts. In the base components and laser chip layer, its fiercest rival is Coherent Corp, another vertically integrated materials and photonics heavyweight. In the systems and transceiver module layer, Lumentum goes head-to-head with pure-play assemblers such as China-based Innolight, which currently defends the top global spot in module assembly volume, and Eoptolink. To scale its systems manufacturing without drowning in capital expenditures, Lumentum leverages a highly symbiotic relationship with contract manufacturing partners. Fabrinet, utilizing its extensive footprint in Thailand, serves as Lumentum's primary manufacturing partner, executing the precision optical packaging required to deliver multi-hundred-million-dollar purchase orders to hyperscalers.
Market Share and the Indium Phosphide Moat
In the highly specialized realm of artificial intelligence optics, market share is dictated by physics and materials science rather than software lock-in. Lumentum currently commands an estimated 50 to 60 percent of the global market share for Electro-Absorption Modulated Lasers. While Coherent holds roughly a 25 percent volume share in the broader optical transceiver module market, Lumentum's competitive moat is rooted in extreme high-end performance, specifically its dominance in 200-gigabit-per-lane technology. Lumentum is uniquely positioned as the dominant supplier shipping 200G per lane lasers at commercial volume, the critical building block required to manufacture 1.6T transceivers. This technological leadership stems from its Indium Phosphide wafer fabrication capabilities, an incredibly difficult manufacturing process that few companies on earth can replicate. Because the hyperscale demand for artificial intelligence cluster interconnects has vastly outpaced global Indium Phosphide capacity, Lumentum operates in an environment where industry demand exceeds supply by an estimated 25 to 30 percent. This supply-demand mismatch grants Lumentum immense pricing power and margin leverage, insulating it from the typical commoditization curves seen in legacy optical hardware.
Industry Dynamics: The Copper Wall and The Optical Supercycle
To understand Lumentum's trajectory, one must analyze the stark bifurcation of the global optical communications market. The legacy telecommunications sector is currently suffering through inventory digestion and stagnation. Conversely, the datacom sector is experiencing a hyper-growth supercycle driven strictly by artificial intelligence infrastructure. The foundational industry dynamic driving this cycle is known as the Copper Wall. Historically, data centers utilized copper twinax cables for short-reach connections within server racks. However, as data transmission speeds migrate from 800G to 1.6T to feed power-hungry GPUs, copper wiring suffers from unacceptable signal degradation, latency, and thermal output. At 1.6T speeds, optical interconnects transition from being a high-performance luxury to an absolute physical necessity for intra-rack communication. Consequently, the global optical transceiver market is projected to surge from $16.5 billion in 2025 to $26 billion in 2026. Hyperscalers are structurally reshaping their supply chains by signing long-term strategic agreements to hoard scarce optoelectronic components, creating a multi-year runway of demand visibility for top-tier Indium Phosphide suppliers like Lumentum.
Growth Engines: 1.6T, Optical Circuit Switches, and Co-Packaged Optics
Lumentum's future revenue and profit expansion rest on three major product pillars. The first is the massive ramp of 1.6T transceivers. Lumentum's 1.6T DR4 OSFP modules, which integrate four of its proprietary 400G differential lasers, are seeing explosive demand as hyperscalers roll out next-generation AI networking fabrics. The second pillar is the Optical Circuit Switch portfolio. Originally a niche technology customized for Google's internal network architecture, optical circuit switching is rapidly becoming a standard for large-scale AI fabrics because it allows operators to dynamically reconfigure GPU clusters using mirrors and light, bypassing power-hungry electronic switches. Lumentum recently disclosed a multi-year, multi-billion-dollar Optical Circuit Switch backlog with expectations of crossing a $100 million quarterly revenue run rate by the end of 2026. The third, and arguably most disruptive, growth driver is Co-Packaged Optics. As silicon networking switches scale beyond 100 terabits per second, plugging traditional transceivers into the faceplate consumes too much power. Co-Packaged Optics brings the optical connections directly onto the silicon substrate. Lumentum is currently commercializing Super-High-Power 800-milliwatt to 1-watt continuous wave lasers designed specifically to act as the external light sources for these advanced architectures, securing its footprint in the computing platforms of the late 2020s.
Disruptive Threats: Silicon Photonics and Linear Pluggable Optics
Institutional investors must continually scrutinize the horizon for disruptive architectures, and in the optical networking industry, the primary threats to incumbent hardware are Silicon Photonics and Linear Pluggable Optics. These technologies aim to fundamentally redesign the optical module. Linear Pluggable Optics removes the expensive and power-hungry Digital Signal Processor chips from the transceiver, while Silicon Photonics seeks to integrate optical modulators directly onto standard silicon wafers, leveraging traditional semiconductor foundry scale to drive down unit costs. For pure-play transceiver assemblers, these architectures represent a severe deflationary threat to their bill of materials. However, Lumentum's fundamental business model is highly insulated from this disruption due to a persistent law of physics: silicon is an indirect bandgap material, meaning it cannot efficiently emit light. Even the most advanced Silicon Photonics chips and Linear Pluggable Optics modules require an external Indium Phosphide laser diode to generate the actual photons. Consequently, as the industry transitions toward these disruptive, highly integrated silicon architectures, it actually expands the total addressable market for Lumentum's high-power continuous wave lasers, transforming a systemic threat into a lucrative component sales opportunity.
Management Track Record: Hurlston's Transformation
Under the leadership of Chief Executive Officer Michael Hurlston, Lumentum's management team has executed an exceptionally precise strategic pivot over the last few years. Recognizing the limitations of remaining a merchant supplier of naked laser chips, management aggressively pursued the Cloud Light acquisition, a move that was initially viewed as risky but proved phenomenally accretive by capturing the 800G market inflection perfectly on time. Furthermore, management recognized that Coherent's transition to 6-inch Indium Phosphide wafers at its Texas facility posed a long-term structural cost threat. In response, Lumentum decisively acquired a fully operational 240,000 square-foot fabrication facility in Greensboro, North Carolina, from semiconductor maker Qorvo. This rapid deployment of capital will allow Lumentum to scale its own 6-inch wafer production by 2028, defending its manufacturing moat and domestic supply chain appeal. The operational rigor of this management team is best quantified by recent margin execution. In the third quarter of fiscal 2026, the company achieved a remarkable 540 basis point sequential expansion in gross margins, driving non-GAAP operating margins to 32.2 percent. Navigating a complex hardware manufacturing scale-up while simultaneously expanding operating margins by over 2000 basis points year-over-year demonstrates elite management execution and stringent pricing discipline.
The Scorecard
Lumentum Holdings has successfully positioned itself as the indispensable toll collector for the artificial intelligence hardware buildout. The company's unique mastery of Indium Phosphide manufacturing, combined with its strategic foresight to vertically integrate into full systems via Cloud Light, has yielded a dominant market position with extreme barriers to entry. The physical limitations of copper interconnects ensure that the transition to 1.6T transceivers and Optical Circuit Switches will proceed unabated, providing Lumentum with unprecedented pricing power and a multi-year backlog backed by the deepest pockets in global technology.
Conversely, the primary risk rests entirely on valuation and execution expectations. The market has violently repriced this equity to account for a flawless execution of the optical supercycle, leaving virtually no margin for error in manufacturing yields or capacity ramp-ups at the new North Carolina facility. Any deceleration in hyperscale capital expenditures or technical delays in Co-Packaged Optics adoption could trigger a severe multiple compression. Ultimately, Lumentum owns the critical physical bottleneck of the modern data center, making it a structurally essential asset, though one that requires extreme vigilance regarding cyclical capital spending patterns.