Key Highlights

● Marvell rose 9.42% to $168.93 as AI hardware stocks rebounded sharply.

● The shares remain pressured by the planned all-stock Takeover of Lumentum.

● Fiscal second-quarter Revenue hit a record $2.739 billion, up 37% from a year earlier.

● Fiscal third-quarter revenue is guided to $3.15 billion, plus or minus 5%.

Why did Marvell Technology (NASDAQ:MRVL) jump onto the list of the most actively traded U.S. stocks on Wednesday? The chipmaker was swept up in a sharp rebound in AI hardware stocks, giving shareholders a break after a bruising stretch triggered by its planned takeover of Lumentum (NASDAQ:LITE). Marvell rose 9.42% to $168.93, with 10.28 million shares traded in the snapshot used for the ranking. The shares were up more than 12% at one point in the morning.

The catalyst came from outside the company. AI cloud provider CoreWeave (NASDAQ:CRWV) reported third-quarter revenue of $3.66 billion late on Tuesday, more than double a year earlier, and raised its full-year revenue guidance to $13 billion to $13.3 billion. The results eased worries about whether AI Data Center spending is backed by real demand, and investors poured back into chip and networking stocks. The Philadelphia Semiconductor index jumped 5.7%, and the Nasdaq-100 gained 2.28%. Marvell rallied alongside optical-component makers such as Lumentum, as well as Sandisk (NASDAQ:SNDK) and Micron (NASDAQ:MU).

What Marvell does

Marvell designs chips that move and process data inside data centers. Its products include electro-optical interconnects that link AI servers, networking and storage chips, and custom AI accelerators, known as XPUs, that it builds for large cloud companies. Data center Demand now drives most of its growth. The company joined the S&P 500 on June 22, 2026, after meeting the index's profitability test.

The Business has grown into a sizable one. Marvell's latest annual revenue is about $8.19 billion, with net profit of about $2.67 billion. That makes it smaller than giants such as Broadcom (NASDAQ:AVGO) and Nvidia (NASDAQ:NVDA), but its focus on the links between chips means it benefits whenever AI clusters get bigger. CoreWeave's disclosure of a Backlog of roughly $133 billion is the kind of signal that matters for suppliers like Marvell, because every new rack of AI servers needs high-speed connections inside and between data centers.

The Lumentum overhang

Wednesday's gain should be read against what happened earlier this month. On Nov. 2, Marvell agreed to buy optical-component maker Lumentum in an all-stock deal valued at about $115 billion in enterprise value. Lumentum holders will receive 4.5 Marvell shares for each share they own, and Marvell shareholders will own about 67% of the combined company. Management projects more than $1 billion in annual cost savings and expects the deal to close in the first half of 2028, subject to Shareholder and regulatory approvals.

Investors were unimpressed. Marvell fell about 12% in the session after the announcement to a three-month low. TD Cowen downgraded the stock to Hold from Buy and cut its price target in half, to $175 from $350. The firm said it expects the deal to dilute Earnings in the first year and sees "material headwinds" for the stock. Bank of America also downgraded the shares. Marvell's share count would rise by roughly 49%, and China's antitrust regulator is seen as a key approval hurdle.

Recent results and guidance

The operating business has been strong. For its fiscal second quarter, reported in late August, Marvell posted record revenue of $2.739 billion, up 37% from a year earlier, with data center revenue growth accelerating to 46%. Non-GAAP earnings were $0.94 per share, and non-GAAP gross Margin was 58.9%. CEO Matt Murphy said AI-related bookings "remain exceptionally robust," and the company raised its revenue outlook for fiscal 2027 and fiscal 2028.

For the fiscal third quarter, which ended in late October, Marvell guided to revenue of $3.15 billion, plus or minus 5%, and non-GAAP earnings of $1.10 per share, plus or minus 5 cents. At the midpoint, that would be about 15% sequential growth.

Valuation

Marvell's trailing P/E is about 55.6, which is more expensive than Broadcom at about 44.7 and Nvidia at about 22, but well below Advanced Micro Devices (NASDAQ:AMD) at about 118. On a forward basis, the stock trades at roughly 33 times forward operating profit. One valuation model estimated a Fair Value of about $128 per share and called the stock "modestly overvalued" at around $164. Wall Street remains more upbeat on balance, with an average analyst target of about $315 over the past month and targets ranging from $175 to $450.

The bull case

Bulls say Marvell sits at the center of AI data center connectivity, a market that grows as clusters get larger and need more high-speed optical links. CoreWeave's results, including management comments that demand through 2028 is several times available capacity, support the idea that this spending is not slowing. Marvell's own guidance points to accelerating revenue, and its custom silicon business gives it a growing role with hyperscalers designing their own chips. Supporters also argue that adding Lumentum's lasers and optical components could make Marvell a broader supplier of optical networking.

The bear case

Skeptics focus on the Lumentum deal. Marvell is giving up about a third of the combined company, and the cost-savings target is small relative to the deal's size, so the transaction depends heavily on optical revenue growing faster than Marvell's existing business. TD Cowen expects first-year dilution, and closing is more than a year away, leaving a long period of regulatory uncertainty. Marvell's large-customer concentration and its exposure to swings in AI spending sentiment also mean that rallies like Wednesday's can reverse quickly.

The Dec. 1 Call and Lumentum Approvals

The next major event is Marvell's fiscal third-quarter report, with a conference call scheduled for Dec. 1. Investors will look at whether revenue meets or beats the $3.15 billion guidance midpoint, how fast data center sales are growing, and what management says about fiscal 2028. Any detail on custom XPU programs and on progress toward regulatory approvals for Lumentum will matter as well. Before that, Nvidia's results on Nov. 17 will test the AI hardware trade that lifted Marvell on Wednesday. Rate expectations are another factor: Fed funds futures now fully price a December rate hike.

Wednesday's move showed that investors still want exposure to AI networking, but the Lumentum deal remains the main question hanging over the stock.