Lumentum Holdings Inc

Blowout quarter + strong momentum (good/surprising): Q4 revenue $1.01B, +109% YoY (and +8th consecutive quarter of growth). Sequential revenue growth also strong with 3rd straight quarter of >20% QoQ. Non-GAAP gross margin crossed 50% (earlier than the company had targeted—initially expected at a ~$2B quarterly run-rate). Non-GAAP operating margin +2,150 bps YoY; Q4 non-GAAP operating margin 36.6%.

Upside guidance: hits revenue target early + margin strength (good): Company expects Q1 FY27 revenue $1.225B–$1.275B (midpoint $1.25B), which reaches a stated $1.25B quarterly target more than a quarter early. Q1 non-GAAP operating margin 39.5%–40.5% (midpoint >2,100 bps YoY expansion). Q1 diluted non-GAAP EPS $4.05–$4.35 (assumes 16.5% effective tax rate, ~102M shares). CFO/CEO framed this as operating leverage + better mix + execution.

Product/category highlights + key growth drivers (opportunities): - Components revenue $649M (+22% QoQ, +103% YoY) driven by laser momentum. - Pump lasers +80% YoY, effectively sold out, and company expects ~4x pump laser shipment increase over coming quarters. - EMLs record quarter, especially 100G-per-lane (+130%+ YoY assemblies) and 200G-per-lane now >25% of EML revenue. - Systems revenue $357M (+30% QoQ, +123% YoY) driven by cloud transceivers and OCS. - Cloud transceivers: bulk at 800G, and began shipping 1.6T transceivers as planned; profitability improving via yield + utilization + higher ASP 1.6T rollout. - Company expects 1.6T uptake to intensify in fiscal Q1 through calendar 2027 (customers transitioning from 800G → 1.6T). - OCS: internal manufacturing ramp led to first triple-digit OCS revenue quarter expected in Q1; demand for 2027 described as “incredibly strong.”