Lumentum Stock Jumps 6% as Optics Sold Out Through 2029

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Lumentum shares rose about 6% after its CEO said optical components are sold out through early 2029, with up to 70% of some demand unmet through 2027.

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What Did the Lumentum CEO Say About Demand?

Hurlston said Lumentum cannot meet about 70% of demand for some products through next year, and about 30% of demand for certain other products through 2028. Six months earlier, he had indicated the company was on track to sell out its capacity by 2028, so the sold-out horizon has moved out by roughly a year.

Shares closed at about $128 on Thursday, down roughly 19% over six months and below a 52-week high near $171. Friday's gain recovered part of that decline.

Why Is Demand for Optical Components So Strong?

Demand is strong because larger AI systems need far more high-speed links between processors, and optical connections are replacing copper as the main way to move that data. Lumentum supplies lasers and optoelectronic parts used for transmission within and between data centers, including components for 1.6T transceiver modules and co-packaged optics, which place lasers next to the switch chip to cut power use.

The company's most recent results show the scale of the shift. Revenue for the fiscal fourth quarter ended in June reached $1.01 billion, with a non-GAAP operating margin of 36.6% and non-GAAP earnings of $3.23 per share. Fiscal 2026 revenue totaled $3.014 billion, up 83.2% from a year earlier.

Guidance for the September quarter calls for revenue of $1.225 billion to $1.275 billion, a non-GAAP operating margin of 39.5% to 40.5%, and non-GAAP earnings of $4.05 to $4.35 per share. Nvidia (NVDA) has also taken a strategic stake in the company, reported at $2 billion, which ties Lumentum closely to the largest AI hardware buyer.

How Are Other AI Stocks Reacting?

Optical and connectivity names rose in sympathy. Coherent (COHR), AXT (AXTI), MaxLinear (MXL) and Amphenol (APH) each gained more than 6% in early trading as investors read Lumentum's comments as evidence of a supply-constrained market across the sector.

For readers weighing how to invest in ai infrastructure, the episode shows where bottlenecks sit. Chips and servers drew most attention earlier in the cycle. Lasers, indium phosphide wafers and other optical inputs now set the pace of deployment, which shifts pricing power toward suppliers with qualified production lines.

When Will Lumentum Capacity Catch Up?

Relief is unlikely before 2029 or 2030. Building new laser capacity takes three to five years from construction to customer shipments, and qualification cycles with hyperscale buyers add further delay. Lumentum has added a fabrication facility in Greensboro, North Carolina, and is expanding a second fab in Japan. Hurlston said increasing output takes time.

A sold-out order book gives the company visibility on revenue and supports margins, which have climbed toward 40% on a non-GAAP operating basis. It also carries risks: customers short of supply may qualify alternative vendors, and any pullback in data-center spending would hit a business now sized for sustained growth. The stock's decline over the past six months, despite record results, suggests investors have weighed those risks as well.

Outlook

Lumentum's commentary pushes the visible demand horizon for AI optics out to early 2029 and confirms that supply, not orders, limits growth in the near term. The next test is the company's fiscal first-quarter report, due in November, when investors will check results against the $1.225 billion to $1.275 billion revenue guidance and look for updates on capacity timing at the North Carolina and Japan sites.