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- Custom AI silicon at 70 is Marvell's highest-materiality node at ~40% of revenue, but it has eased notably over recent days as design-service proxies soften.
- Lumentum revenue running well above its 12-month baseline confirms optical demand pull, with Marvell a PAM4/coherent DSP supplier beneficiary at roughly 20% of revenue (optical networking constraint: 80/100, holding).
- ASE monthly revenue running well above its 12-month trend signals tightening advanced packaging supply; for Marvell this is a buy-side gating cost on its own ramp, not a selling tailwind (OSAT packaging constraint: 84/100, tightening).
Optical networking at 80 and holding is Marvell's tightest positive node, with Lumentum revenue well above trend confirming the demand pull into PAM4 and coherent DSPs. Custom AI silicon at 70 is the highest-revenue node but is easing on the 7-day read, with Alchip and GUC design-service revenues pulling the level down even as Broadcom's backlog stays elevated. CoWoS and OSAT packaging both read tight to critical, but those are buy-side gating costs for Marvell's ramp, not tailwinds.
The qualification-stage XPU sockets are the residual asymmetry: two-to-three-year co-design moats are not easily replicated and the revenue from the next socket generation is not yet in the numbers. That is a real but narrower claim than 'most underrated in the stack,' and it resolves at the late-August call when ramp timing and allocation language either hold or slip.