Marvell has agreed to acquire Lumentum for $115 billion, a blockbuster transaction that TechCrunch ranks among the biggest acquisitions in tech history.

The deal pairs Marvell, a major player in data-center silicon, with Lumentum, a specialist in optical and photonic components — the technology that moves data between chips and across the massive clusters powering modern AI workloads. As AI data centers scale, the bottleneck increasingly sits in interconnects rather than raw compute, which makes optical networking one of the most strategically valuable corners of the hardware stack.

One detail underlines how the AI boom is reshaping the semiconductor landscape: both companies count Nvidia as a strategic investor. The GPU giant's capital now touches both sides of a $115 billion combination, a sign of how tightly the AI supply chain is consolidating around a handful of interlocking players.

At this price, the acquisition stands as one of the clearest bets yet that the AI infrastructure buildout has years to run — and that the companies supplying its plumbing, not just its processors, will capture an outsized share of the value. The deal will face the regulatory scrutiny that comes standard at this scale.