Key Highlights

  • Marvell fell 10.05% to $196.40 on October 30, 2026.
  • Reports say Marvell is nearing an all-stock deal to buy Lumentum.
  • Marvell has lost about 22% over two sessions since the talks surfaced.
  • Marvell guided third-quarter Revenue to $3.15 billion, plus or minus 5%.

What sent Marvell Technology (NASDAQ:MRVL) down 10.05% to $196.40 on Friday, on Volume more than twice its usual level, was a one-two punch: growing evidence that the chipmaker is about to make a large all-stock acquisition, landing on the same day as a broad sell-off in semiconductor stocks. Media reports said Marvell's potential purchase of optical components maker Lumentum Holdings (NASDAQ:LITE) "is not at a big premium" for Lumentum and would be paid for entirely in stock. Investors reacted by selling Marvell for a second straight day.

Two days, more than a fifth of the value

The deal talk began on Wednesday, October 28, when market reports said Marvell was in advanced discussions to buy Lumentum. Marvell closed that day at $251.65, according to market analysis. It fell to $218.34 on Thursday and then to $196.40 on Friday, a cumulative decline of about 22% in two sessions. Lumentum, which also ranked among Friday's most active stocks, fell 8.57% to $840.70, according to market data.

Further reporting added detail that markets found hard to digest. According to market commentary, the two companies have largely agreed on valuation, and market reports said a transaction could be announced as soon as the middle of next week. Neither company has confirmed the talks or announced terms. At Friday morning's prices, Market Analysis valued Lumentum at about $72 billion, roughly 41% of Marvell's market value, which suggests that Lumentum shareholders could end up owning close to 30% of a combined company if a deal were struck with no premium. Those figures are illustrative calculations, not deal terms.

A sector in retreat

The timing could hardly have been worse. Intel (NASDAQ:INTC)'s weak fourth-quarter outlook triggered a global sell-off in chip stocks on Friday, and the Philadelphia Semiconductor index sank 7.2%, according to a closing market summary. Market reports said Amazon (NASDAQ:AMZN)'s aggressive AI spending plans and Intel's cash-burn warning had raised concerns about rising AI buildout costs and the timeline for returns. Nvidia (NASDAQ:NVDA), AMD (NASDAQ:AMD), Broadcom (NASDAQ:AVGO), Micron (NASDAQ:MU), Arm (NASDAQ:ARM) and Qualcomm (NASDAQ:QCOM) all fell, and the Nasdaq-100 closed down 3.46%. The closing market summary attributed Marvell's drop specifically to the Lumentum report.

What Marvell does

Marvell designs semiconductors for data infrastructure. Its largest and fastest-growing Business is the data center, where it sells custom AI chips built to order for large cloud companies, along with electro-optical and networking chips that move data between processors and servers. It also serves enterprise networking, carrier and automotive markets.

The company joined the S&P 500 before the open on June 22, 2026, after S&P Dow Jones Indices announced on June 5 that it would replace PoolCorp (NASDAQ:POOL). Market reports said Marvell qualified after meeting the index's profitability requirement.

Results and guidance

Marvell's most recent quarterly report, for the second quarter of fiscal 2027, came on August 27. Revenue reached a record $2.739 billion, up 37% from a year earlier and $39 million above the midpoint of its guidance. Chief executive Matt Murphy said Data Center revenue grew 46% and that "AI-related bookings remain exceptionally robust." Non-GAAP Earnings were $0.94 a share, and the company raised its revenue outlook for fiscal 2027 and fiscal 2028.

Operating cash flow for the quarter was $605.5 million, cash rose to $3.93 billion, and Marvell repurchased $200 million of its stock during the period, bringing Buybacks to $400 million for the fiscal year to date. On a GAAP basis, which includes items the non-GAAP measure leaves out, earnings were a more modest $0.33 a share.

For the third quarter, Marvell guided revenue to $3.15 billion, plus or minus 5%, and non-GAAP earnings of $1.10 a share, plus or minus 5 cents. It said it expects a significant acceleration in its custom chip business starting in the second half of fiscal 2027. In June, market reports said Marvell expects its custom data center chip business to exceed $10 billion in revenue in fiscal 2029.

Valuation

At about 64.7 times trailing earnings, according to market data, Marvell is expensive on backward-looking profits, well above Broadcom at about 42 times and Nvidia at about 26 times, though below AMD at about 130 times. Its guidance implies much faster earnings growth ahead: third-quarter non-GAAP earnings guidance of $1.10 a share compares with $0.94 in the second quarter. The stock remains well above where it began the year. Market reports noted it had gained 136% year to date before Friday's slide, and its Market Value was about $277 billion when its S&P 500 inclusion was announced in June, compared with about $172 billion now.

The bull case

Supporters argue that buying Lumentum would give Marvell a much larger position in optical technology, one of the critical bottlenecks in connecting ever-larger clusters of AI chips. Lumentum's fiscal 2026 revenue rose about 83% to roughly $3 billion, according to market analysis. An all-stock structure would also avoid adding Debt at a time when markets expect the Federal Reserve to raise rates. Marvell's own fundamentals look strong, with record revenue, raised multi-year targets and guidance calling for further acceleration.

The bear case

Critics see the opposite. An all-stock deal of this size would issue hundreds of millions of new Marvell shares, diluting existing holders, and Lumentum is already richly valued after a big run. Paying in stock when Marvell's own shares have fallen sharply also makes the currency cheaper. Integration of two fast-growing companies would add execution risk just as the custom chip business is meant to ramp. And Friday's sell-off showed how quickly sentiment toward AI hardware can turn when investors start questioning the payback on data center spending.

Deal Terms Could Land Next Week

The immediate catalyst is whether Marvell and Lumentum announce a deal, possibly as soon as next week according to the reports, and on what terms. Investors will want to know the exchange ratio, the expected cost savings and revenue synergies, and how management justifies the price. Beyond that, Marvell's third-quarter report, typically released in late November or early December, will show whether revenue lands near the $3.15 billion target and whether the custom chip acceleration is on track.