Lumentum Holdings reported strong fourth-quarter financial results, with fiscal Q4 revenue reaching $1.01 billion, representing 109% year-over-year growth and 23% sequential growth. The company attributed the surge to heightened demand for optical connectivity components tied to artificial intelligence data-center deployments. Revenue growth marked the eighth consecutive period of year-over-year increases and the third straight quarter with sequential growth exceeding 20%.
Within the product segments, components revenue rose to $649.4 million, up 103% year over year and 22% sequentially, while systems revenue reached $356.9 million, climbing 123% annually and 30% from the prior quarter. Management identified cloud transceivers and optical circuit switches as primary drivers of systems growth. On a non-GAAP basis, gross margin expanded to 50.4%, up 250 basis points sequentially and 1,260 basis points compared to the year-ago period. Non-GAAP operating margin reached 36.6%, increasing 440 basis points from the prior quarter and 2,160 basis points year over year. The company attributed margin improvements to higher factory utilization, favorable product mix, and increased pricing for certain products. Non-GAAP net income totaled $326.3 million, or $3.23 per diluted share.
Under GAAP accounting, the company recorded a net loss of $7.2 billion for the quarter following a $7.8 billion non-cash charge related to convertible notes conversion. Through this transaction, Lumentum reduced convertible debt by $1.1 billion, representing approximately 35% of outstanding convertible debt. Cash and short-term investments declined $430 million sequentially to $2.74 billion, primarily due to the debt conversion activities. Capital expenditures totaled $167 million during the quarter, focused on manufacturing capacity supporting cloud and artificial intelligence customers.
Management issued forward guidance for fiscal first quarter 2027, forecasting revenue between $1.225 billion and $1.275 billion, which at the midpoint represents more than 130% year-over-year growth and achieves a previously targeted $1.25 billion revenue level ahead of schedule. Non-GAAP operating margin is projected at 39.5% to 40.5%, with non-GAAP diluted earnings per share expected between $4.05 and $4.35. Chief Executive Officer Michael Hurlston attributed growth momentum to increasing demand for 800G and 1.6T transceivers, expanding optical circuit switch shipments, and emerging opportunities in near-packaged optics and advanced laser technologies.
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