Lumentum (LITE) Q3 FY26 earnings call: guidance and Q&A

What are the supply-demand dynamics for EMLs and lasers, and Lumentum's ability to ramp production to meet demand?

Lumentum is still significantly lagging demand for EMLs and lasers, with the supply-demand imbalance now greater than 30%. While near-term ramp is largely within Lumentum's control, securing substrates for 2027 will require continued effort. The company is actively increasing supply, expecting a 50% increase in EML supply by December 2026 compared to December 2025.

“The supply-demand imbalance is probably even higher than we reported in our last call, somewhere greater than 30%.”

asked by Ryan Koontz · answered by Michael E. Hurlston

Can you expand on the scale-across opportunity, Lumentum's position in the supply chain, and the potential size of the multi-rail application densification?

Scale-across is a significant, less appreciated opportunity contributing to margin enhancement, particularly for pump lasers and narrow linewidth lasers. These components are more supply-constrained than EMLs. Multi-rail technology will further increase content. While not fully quantified, the multi-rail opportunity is believed to be huge, potentially even bigger than current expectations, with Lumentum focusing on ramping pump capacity.

“Multi-rail increases that content, right, because you've got more pumps that need to go into those. We are focused right now on ramping our pump capacity.”

asked by Ryan Koontz · answered by Michael E. Hurlston

What is the progress on finalizing additional OCS award wins, and how do they compare in size to the previously announced win?

Lumentum continues to work with three customers, with two driving the majority of volume. Significant progress is being made on additional substantial wins, which are on the order of the 2027 backlog. The company is actively working on its roadmap to add differentiation and configurations to service these opportunities.

“I think it's too early to call when we would be able to talk to those. But I would say that they're quite sizable. We really are, as I said in the remarks, working the road map to add differentiation, different port counts, different configurations to service these multiple opportunities.”

asked by Samik Chatterjee · answered by Michael E. Hurlston

Which areas are accelerating in the Q4 revenue guide, and where are supply constraints having the most impact?

The Q4 guide contemplates increases in EMLs, scale-across components, and OCS, but the biggest driver is transceivers, particularly 1.6T. Despite margin challenges in transceivers, improvement is expected. Supply constraints, primarily electrical components and laser diodes, are significantly limiting transceiver shipments, causing Lumentum to undership demand.

“But specific to your question on the guide, I think the big headline is going to be transceivers. We appear to be ahead on 1.6T. We seem to be executing relatively well.”

asked by Samik Chatterjee · answered by Michael E. Hurlston

Given the demand pickup for pump lasers in scale-across, what is the mix of demand, and does the supply-demand imbalance of 30% persist into next year?

Constraints on pump lasers are significant and somewhat unanticipated, with the supply-demand imbalance certainly greater than 30%. Lumentum is making choices on allocation and plans to ramp capacity over the next four quarters at its Rose Orchard facility, investing heavily in CapEx to enable this.

“I don't think we've given a number of the supply-demand imbalance, but it's certainly greater than that 30% number. We are significantly undershipping demand.”

asked by Vijay Rakesh · answered by Michael E. Hurlston

What is the progression of in-sourcing CW lasers for transceivers, and can you provide a waterfall analysis of gross margin drivers?

In-sourcing of CW lasers is driven by margin improvement and external supply tension, with about 20% of Q4 modules expected to use internal CW lasers. Margin improvement comes from better factory absorption, product portfolio optimization (dropping low-margin lines), and pricing flexibility due to supply-demand imbalance. Management sees significant room for further margin growth.

“I think in our mix, roughly, as we think about it in this -- in the guide, it would be about 20% of our modules would have our own CW lasers. It's still minority, but we'd expect to step that up through time and see some of the associated margin benefit as a result.”

asked by Meta Marshall · answered by Michael E. Hurlston

Beyond ultra-high power lasers, what is the opportunity for Lumentum in vertically integrated ELS products for the CPO market, and are the same customers engaged?

Lumentum sees a very significant opportunity in ELS, particularly for non-primary customers less familiar with optics. The company believes ELS offers a more convincing and shorter path to market than just supplying lasers, and this vertical integration strategy is crucial as the CPO horizon expands. Significant wins are anticipated soon.

“But in particular, as we expand the CPO horizon, we are going to need that vertical integration strategy that you asked in your question.”

asked by Papa Sylla · answered by Michael E. Hurlston

Can you elaborate on OCS supply constraints and Lumentum's competitive position, especially with new Chinese competitors?

OCS is a major ramp and a 'tight rope' due to the rapid increase in volume, with the supply chain being a challenge. Lumentum feels confident about its competitive position for the next year due to its innovative solutions. The company is actively working on cost reduction and new architectures to maintain its leading position with MEMS technology, acknowledging that competition will eventually emerge.

“But it's really coming down to how these discussions play out as to how I think Wupen and his team think about the allocation.”

asked by Christopher Rolland · answered by Michael E. Hurlston