AMD Just Delivered Fantastic News to Marvell Stock Investors

In a recent disclosure from its latest 13F filing, Advanced Micro Devices (NASDAQ: AMD) revealed a new equity stake in Marvell Technology (NASDAQ: MRVL). Valued at roughly $6.5 million, the position is modest for a company of AMD's scale. Nevertheless, AMD's investment in Marvell carries symbolic weight.

It underscores that success in artificial intelligence (AI) is supported not only by raw compute power, but also by a web of connectivity that stitches clusters of AI accelerators into high-performance systems.

Let's examine Marvell's increasing relevance to AI and the strategic logic behind major engagement from graphics processing unit (GPU) architects. From there, we'll take a look at Marvell's valuation trends throughout 2026 to determine whether the stock is a smart buy right now.

Marvell's importance to the AI chip stack

While the chip spotlight often falls on GPUs and Alphabet's Tensor Processing Units (TPUs), Marvell addresses an equally vital challenge in data movement. In AI training and inference clusters, the bottleneck has migrated from compute capacity to interconnect density, latency, and efficiency.

The big five AI hyperscalers -- Microsoft, Alphabet, Amazon, Meta Platforms, and Oracle -- are expected to pour nearly three-quarters of $1 trillion into capital expenditures (capex) in 2026 alone. As data center servers scale toward hundreds of thousands or even millions of GPUs and accelerators, every incremental improvement from interconnect power efficiency translates directly into higher compute use and lower cost of ownership.

These dynamics explain why Marvell's relevance is on the rise. The company's portfolio features a number of products tailored toward moving data at high speeds with minimal power consumption and latency. Marvell's core offerings include custom application-specific integrated circuits, high-performance Ethernet switches, data processing units, silicon photonics, and advanced digital signal processing technologies.

AMD isn't the only AI behemoth interested in Marvell

In late March, Nvidia announced that it had invested $2 billion in Marvell. As part of the deal, Nvidia is bringing its NVLink Fusion platform to Marvell in an effort to co-develop silicon photonics technologies and expand its AI infrastructure ecosystem. Now, barely a month later, AMD has disclosed its own equity position in Marvell.