Which AI Accelerator Stock Has Dominated in 2026: Broadcom or Marvell?

The answer to which AI accelerator stock has dominated in 2026 isn’t subtle. Marvell Technology (NASDAQ:MRVL | MRVL Price Prediction) stock is up 218% year to date (YTD), trading around $264 Wednesday afternoon after slipping 5% on the session. Broadcom (NASDAQ:AVGO) stock, by contrast, is up only 10% YTD, hovering near $378.

Both companies design custom AI accelerators (custom XPUs and ASICs) and data-center silicon, which is why investors routinely line them up against one another. Yet, the 2026 scoreboard isn’t close. Marvell stock has outrun Broadcom stock by a wide margin in percentage terms, even as Broadcom remains the far larger company by market value at $1.87 trillion versus Marvell’s $269 billion.

The headline answer, then, is Marvell stock. The more interesting question is why the gap is so wide when both names are riding the same custom-silicon wave.

Why Marvell Dominated the 2026 Tape

Marvell’s surge has tracked accelerating AI demand inside its data center segment. The company reported Q1 FY2027 revenue of $2.418 billion, up 28% year over year, with data center revenue of $1.83 billion representing 76% of total sales.

Marvell CEO Matt Murphy declared, “We are seeing exceptional AI-related bookings, and as a result, we are significantly raising Marvell’s revenue outlook for both fiscal 2027 and fiscal 2028.” Marvell guided Q2 FY2027 revenue to $2.7 billion, implying 35% YoY growth, and management said growth should keep accelerating each quarter through fiscal 2027.

Marvell’s smaller, more pure-play profile (custom XPUs, optical interconnect, Ethernet switching, plus recent acquisitions of Celestial AI and XConn Technologies) amplified the percentage move in Marvell stock. Reddit’s r/stocks community has reflected the run, with one widely shared thread titled “I bought MRVL at $82 off hiring data. It’s $325 now and I can’t decide whether to sell” capturing the profit-taking tension among retail investors.

Broadcom’s Quieter 2026 Despite Bigger AI Dollars

Broadcom posted Q2 FY2026 revenue of $22.19 billion, up 48% YoY, with AI semiconductor revenue of $10.8 billion, up 143% YoY. Broadcom CEO Hock Tan guided Q3 FY2026 AI semiconductor revenue to $16 billion, implying over 200% YoY growth.

Those AI numbers from Broadcom dwarf Marvell’s entire quarterly revenue base. However, Broadcom is diversified across networking silicon, broadband, storage, and infrastructure software (including VMware), so a given dollar of AI-silicon growth moves the overall Broadcom story less in percentage terms. That dilution helps explain why Broadcom stock, despite a strong fundamental backdrop, has lagged Marvell stock this year.

Tan asserted, “The momentum continues and in Q3 we expect semiconductor revenue from AI to grow over 200 percent year-over-year to $16.0 billion.” Broadcom also returned cash via $600 million in share repurchases during the quarter and a quarterly dividend of $0.65 per share.

Momentum Versus Expectations

The open question is whether Marvell’s rally reflects durable momentum or stretched expectations. Marvell stock now trades at a trailing P/E ratio of 93x and a forward P/E ratio of 76x, with a beta of 2.28 reflecting its higher volatility profile.

Broadcom stock carries a trailing P/E ratio of 63x, a forward P/E ratio of 36x, and a beta of 1.43. The bear case on Marvell stock is that expectations are already pricing in years of flawless AI execution. The bull case is that data center bookings keep accelerating and design wins continue compounding.

For Broadcom, the bull case is sheer scale plus a stated CEO goal of exceeding $100 billion in AI sales by 2027. The bear case is that diversification caps how dramatically Broadcom stock can re-rate from any single AI catalyst. Investors weighing the pair should consider keeping their position sizes modest given the velocity on both sides.

What to Watch

Investors can watch for whether Marvell’s next earnings update confirms the accelerating-each-quarter revenue trajectory, and whether Broadcom’s Q3 FY2026 results land the $16 billion AI guidance cleanly. Either event could reset the 2026 scoreboard.

Broader semiconductor sentiment may also matter. Reddit chatter on Marvell has swung sharply, with sentiment scores ranging from 38 to 72 across a recent five-day window, while Broadcom sentiment turned bearish in late June. That retail volatility could shape near-term moves alongside any company-specific news.

For now, Marvell has clearly dominated 2026 in terms of stock performance, while Broadcom has dominated in absolute AI revenue scale. The next set of earnings reports could clarify which story carries the rest of the year.