On 2 November 2026, Marvell announced an all-stock agreement to buy Lumentum, with an implied Lumentum enterprise value of $115 billion, or about $1,132 per Lumentum share. Cash is paid only in place of fractional shares. Lumentum holders would get 4.500 Marvell shares for each eligible common share they own, and both stocks fell sharply the day it was announced.
Key takeaways
- Marvell agreed to buy Lumentum in an all-stock deal valued at $115 billion.
- The combined company would make chips and light-based parts for AI data centres.
- The value Lumentum holders receive will move with Marvell's share price.
What happened: Marvell agreed to buy Lumentum
Marvell and Lumentum signed their merger agreement on 1 November 2026 and announced it the next day. It is an all-stock acquisition. Each Lumentum common share converts into 4.50 Marvell common shares, with cash paid only in place of fractional shares.
One caveat matters more than the headline number. The $115 billion is an implied enterprise value, a measure of the whole business, not a cash payment. Reuters reported that the figure includes debt.
| Item | Detail (announced 2 Nov 2026) |
|---|---|
| Buyer and target | Marvell Technology (MRVL) and Lumentum Holdings (LITE) |
| Structure | All stock, fixed ratio |
| Exchange ratio | 4.500 Marvell shares per Lumentum share |
| Implied enterprise value | $115 billion, about $1,132 per Lumentum share |
| Premium | About 23.9% to the 28 October 2026 close |
| Ownership after closing | About 67% Marvell holders and 33% Lumentum holders, including shares that may be issued |
What each company actually makes
Marvell sells networking chips and chips designed for specific customers in data centres. That's the electrical side: chips that push data around. In its fiscal 2026 year, ended 31 January, Marvell reported $8.1946 billion in total net revenue, of which data-centre revenue was $6.1003 billion, or 74%.
Lumentum makes lasers and optical parts. A laser creates a light signal. A transceiver is the part that turns electrical signals into light and back again at the other end. Lumentum reported $3.014 billion in net revenue for the fiscal year ended 27 June 2026.
Put together, the companies would sell both halves of the link: the chip that sends the data and the optics that carry it.
For context on the firms driving this spending, see our ranking of the biggest AI companies in 2026.
Why optics became the bottleneck in AI data centres
A faster chip doesn't help if the data can't reach the next chip quickly. Large AI models run across thousands of AI chips that have to work as one machine.
Copper cable runs out of road as speed and distance rise. A 2026 analysis in npj Nanophotonics says copper reach limits typical AI groups to 72 to 144 chips. Light over fibre goes much further. At a 2025 Optica conference, researchers described training a 175-billion-parameter language model on 1,024 GPUs across two data centres 120 km apart using an 800-gigabit-per-second optical network.
The money is already moving. Applied Optoelectronics said on 9 March 2026 that it had received a first volume order for 1.6T transceivers worth more than $200 million from a single large cloud customer. Marvell said on 12 March 2026 that its Ara 1.6T optical chip was shipping in mass volume. The numbers 800G and 1.6T simply describe how much data a link can carry.
What Lumentum shareholders would get
The ratio is fixed: 4.500 Marvell shares per Lumentum share, cash only for fractions. Fixed means the share count is locked, but the dollar value isn't. The $1,132 figure comes from Marvell's 28 October 2026 close of $251.65. If Marvell's share price moves before closing, the value of what Lumentum holders receive moves with it.
There's a second consequence. Marvell has to issue a large number of new shares to pay for this. Current Marvell stockholders are expected to own about 67% of the combined company on a fully diluted basis, with Lumentum holders at about 33%.
Why both shares fell on announcement day
Marvell closed at $171.41 on Nasdaq at 4:00 p.m. ET on 2 November, down 12.72% from its 30 October close of $196.40. Lumentum closed at $684.40, down 18.59% from $840.70. So Lumentum ended the day below the 28 October level the premium was measured against.
That's the logic of a fixed-ratio stock deal. Lumentum holders are being handed Marvell shares rather than cash, so Lumentum starts trading as a reflection of Marvell.
Marvell expects more than $1 billion in annual cost savings. Its investor presentation puts the combined potential market at $550 billion for calendar 2030.
For how other large tech names are financing this build-out, see our piece on the Magnificent 7 stocks.
What happens next
Nothing is final. Marvell and Lumentum signed their merger agreement on 1 November 2026.
Three things are worth following. Whether the cost savings target gets firmer numbers, since Marvell itself flags it as forward-looking. Whether large cloud buyers keep ordering optical hardware at the pace seen in 2026. And whether Marvell's share price holds, because the value Lumentum holders receive is tied to it.
Frequently asked questions
Is the Marvell Lumentum deal cash or stock?
All stock. Each eligible Lumentum common share converts into 4.50 Marvell common shares, with cash paid only in place of fractional shares. The merger agreement excludes certain specified shares from that conversion, so this is the rule for common stock, not for every security or employee award. Because the ratio is fixed rather than the price, the dollar value depends on where Marvell trades when the deal completes.
What does the $115 billion figure actually mean?
It is the implied enterprise value of Lumentum stated in the 2 November 2026 announcement, about $1,132 per Lumentum share. Enterprise value is a way of pricing the whole business rather than just its shares. Reuters reported that it includes debt. Other than cash in lieu of fractional shares, no cash is paid for eligible common shares.
How big is Lumentum compared with Marvell?
Marvell reported $8.1946 billion in total net revenue for its fiscal 2026 year ended 31 January 2026, with $6.1003 billion of that from data centres. Lumentum reported $3.014 billion in net revenue for its fiscal year ended 27 June 2026. The ownership split tells a similar story: Marvell holders are expected to hold about 67% of the combined company.
Is data centre optical networking the same as fibre internet?
Both send data as light through glass fibre, so the basic physics is shared. The difference is the job. Home fibre connects a building to a network. Data centre optics connect computing equipment at very high speeds, inside a rack, across a building, or between sites. The 2025 Optica field trial linked two data centres 120 km apart at 800 gigabits per second to train one model.
Could 800G hardware be replaced quickly by 1.6T?
Both are selling at the same time. Applied Optoelectronics reported an 800G order worth more than $53 million on 23 March 2026, and said in May 2026 that it had monthly capacity of nearly 100,000 800G transceivers at the end of March. Two weeks earlier it had reported a 1.6T order above $200 million. Marvell's 1.6T optical chip was already shipping in volume in March 2026.
Sources
- U.S. Securities and Exchange Commission: Marvell and Lumentum transaction announcement
- U.S. Securities and Exchange Commission: Marvell 2026 Form 10-K (11 March 2026)
- U.S. Securities and Exchange Commission: Lumentum 2026 Form 10-K (17 August 2026)
- npj Nanophotonics: Optical interconnects for AI data centers (2026)
- Optica Publishing Group: Distributed training of a 175-billion-parameter model (2025)
- Applied Optoelectronics: First volume order for 1.6T data-centre transceivers (9 March 2026)
- Marvell Technology: Marvell and Lumentum to combine (2 November 2026)
- Marvell Technology and Lumentum Holdings: Agreement and plan of merger (1 November 2026)
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