Selling to Many, Not to OneWide moat

The most underappreciated difference between Marvell's two data-center businesses is the customer structure. A custom accelerator is designed for exactly one buyer, who can cancel it. An optical DSP is sold to module manufacturers who sell to many operators — so Marvell's optics revenue depends on the aggregate build-out rather than on any single procurement decision.

That makes the interconnect franchise the more defensible half of the company even though it attracts less attention. It has recurring characteristics that custom silicon lacks: products ship for years across many customers, design wins at module makers persist through generations of the end system, and no single conversation determines the outcome.

The trade-off is that a merchant component business has less pricing power than a sole-source custom engagement, and faces the specialists directly. Watch the disclosed split between custom and electro-optics inside data-center revenue. A company whose growth is carried by interconnect is a more durable business than one carried by a handful of custom programs — and the market, focused on the AI-chip story, tends to price the reverse — and Marvell reports both inside a single data-center number that grew 42% in fiscal 2026¹.