---
title: "Lumentum says AI laser demand is sold out into early 2029; Sivers' $30 million plant lands in 2027"
description: "Lumentum says it is sold out into early 2029, and its new US plant reaches volume only in mid-2028. Sivers' $30 million Glasgow expansion switches on in late 2027, inside that window, and the shareholders who funded it in spring vote on October 22 on the options that staff the ramp."
publisher: "The Inference"
section: "Hardware"
published: 2026-10-16T15:22:46.336Z
modified: 2026-10-16T15:22:46.336Z
canonical: https://theinference.org/article/lumentum-says-ai-laser-demand-is-sold-out-into-early-2029-sivers-30-million-plant-lands-in-2027
language: en
keywords: "Optics, Semiconductors, AI Infrastructure, Capital Markets, Chipmakers"
---

# Lumentum says AI laser demand is sold out into early 2029; Sivers' $30 million plant lands in 2027

> Lumentum says it is sold out into early 2029, and its new US plant reaches volume only in mid-2028. Sivers' $30 million Glasgow expansion switches on in late 2027, inside that window, and the shareholders who funded it in spring vote on October 22 on the options that staff the ramp.

[Lumentum](https://theinference.org/markets/companies/lumentum), the San Jose incumbent that makes the light sources carrying data between AI servers, says it is [completely sold out into early 2029](https://finance.yahoo.com/technology/ai/articles/lumentum-ai-optical-components-sold-112901568.html) [1]. [Sivers Semiconductors](https://theinference.org/markets/companies/sivers-semiconductors-ab), a Stockholm-listed Swedish chipmaker a fraction of its size, is spending $30 million to switch laser capacity on inside that gap, on a balance sheet its shareholders filled this spring [6]. At an [extraordinary general meeting on October 22](https://www.sivers-semiconductors.com/investors/corporate-governance/sivers-semiconductors-general-meetings/), those shareholders vote not on the money but on the people: an option program for the team expected to run the ramp, with registration to attend closing today [3][9].

## The incumbent has admitted the window

In Tokyo on October 9, Lumentum chief executive Michael Hurlston said his company cannot satisfy roughly 70 percent of demand for some products into next year [1]. Its new Greensboro plant in North Carolina reaches volume only in mid-2028 [4].

The mechanism underneath is simple: optical links are moving from between racks to inside them, every added link needs its own indium-phosphide light source, and that material has few producers and long waits for new capacity [4]. [Nvidia put $2 billion into Lumentum in March](https://theinference.org/article/lumentum-is-sold-out-to-2029-while-coherent-s-insiders-sold-1-1-billion-of-nvidia-s-other-optics-bet), attached to a multibillion-dollar purchase commitment and rights to future laser supply; paying before the plant exists is how a customer buys its place in the queue [4].

*Chart: **Lumentum's quarterly revenue climbed from $0.37 billion to $1 billion in ten quarters, and guidance points higher** Line chart of Lumentum's quarterly revenue rising from about $0.37 billion in the December 2023 quarter to $1.0 billion in the June 2026 quarter, with a dashed guided point at $1.25 billion for the September 2026 quarter.*

*Fiscal quarters labeled by calendar quarter; revenue in US$ billions from SEC filings. The dashed point is the midpoint of management guidance for the September 2026 quarter. [5][4]*

## Glasgow lands before Greensboro does

The Sivers expansion starts this half and [turns operational in the fourth quarter of 2027](https://www.sivers-semiconductors.com/press/sivers-semiconductors-invests-usd-30-million-to-expand-european-photonics-manufacturing-for-ai-datacenters/), lifting annual output past 100 million continuous-wave distributed feedback (DFB) lasers, the light sources that push data through fibre, with in-house capacity alongside foundry partners [2]. The money is already raised: roughly SEK 825 million of directed share issues this spring, plus a lender loan converted into equity [6].

What is not there yet is the business. [Second-quarter net sales were SEK 53.8 million against an adjusted EBITDA loss of SEK 35.5 million](https://www.sivers-semiconductors.com/press/sivers-semiconductors-reports-q2-2026-results-as-product-growth-record-pipeline-and-customer-ramps-position-company-for-growth-acceleration/), which sizes how long the spring cash lasts [6]. The $1.2 billion opportunity pipeline has to start shipping before the money runs down [6].

## The vote staffs the ramp, and the shorts bet against it

The stock [fell 11 percent to EUR 2.00 on October 15](https://www.ad-hoc-news.de/boerse/news/unternehmensnachrichten/sivers-semiconductors-retreats-as-ai-linked-selloff-collides-with-shifting-short-interest/70330897) and remains up 458 percent this year, which is the mood around the ballot [3]. The employee option program on the table dilutes holders by up to 6.1 percent once existing plans are counted, alongside a switch of auditor from Deloitte to EY [8]. The options do not pay for the fab; they hold the people who will run it.

Against the plan, [publicly disclosed short positions stand at 5.53 percent](https://www.ad-hoc-news.de/boerse/news/unternehmensnachrichten/sivers-semiconductors-courts-us-investors-while-shareholders-weigh-dilution-risk/70325365) of the register, and former chairman Thomas Duffy has sold his entire holding of 840,000 shares [8]. On the other side of the ledger, [Citibank](https://theinference.org/markets/companies/citigroup) has registered 50 million American depositary shares and an investor-relations lead is being hired in Silicon Valley [8], ahead of a US listing management aims to make trading-ready by early 2027 [7].

## Two November reports will test the bet

The demand side of this bet is settled by the incumbent's own admission; everything left is execution. Lumentum reports on November 5, Sivers follows with third-quarter numbers on November 26 [4][3]. If the pipeline becomes shipped lasers in 2027, the gap between what AI clusters can compute and what their networks can carry gets closed in Glasgow. The company that ships volume into a sold-out market keeps the orders.

## Takeaway

Lumentum's admission that AI laser demand is sold out into early 2029 turns Sivers' $30 million Glasgow plant, operational in late 2027, from a small bet into a timed one: it ships volume inside the incumbent's window, and the October 22 vote on staff options is the first test of whether the ramp happens.

## Sources

1. [Quartz via Yahoo Finance, "Lumentum AI optical components sold out through 2029", 9 October 2026](https://finance.yahoo.com/technology/ai/articles/lumentum-ai-optical-components-sold-112901568.html)
2. [Sivers Semiconductors press release, "Sivers Semiconductors Invests USD 30 Million to Expand European Photonics Manufacturing for AI Datacenters", 3 September 2026](https://www.sivers-semiconductors.com/press/sivers-semiconductors-invests-usd-30-million-to-expand-european-photonics-manufacturing-for-ai-datacenters/)
3. [ad-hoc-news.de, "Sivers Semiconductors Retreats as AI-Linked Selloff Collides With Shifting Short Interest", 16 October 2026](https://www.ad-hoc-news.de/boerse/news/unternehmensnachrichten/sivers-semiconductors-retreats-as-ai-linked-selloff-collides-with-shifting-short-interest/70330897)
4. [Rackline, "Lumentum Bets on Capacity as AI Optics Demand Outruns Its Factories", October 2026](https://www.rackline.news/story/fz8mna)
5. [Lumentum quarterly figures from its SEC filings, retrieved 16 October 2026](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0001633978)
6. [Sivers Semiconductors press release, "Sivers Semiconductors Reports Q2 2026 Results as Product Growth, Record Pipeline and Customer Ramps Position Company for Growth Acceleration", 27 August 2026](https://www.sivers-semiconductors.com/press/sivers-semiconductors-reports-q2-2026-results-as-product-growth-record-pipeline-and-customer-ramps-position-company-for-growth-acceleration/)
7. [ad-hoc-news.de, "Sivers Semiconductors Bets $30 Million on Glasgow as AI Optics Market Opens Up", October 2026](https://www.ad-hoc-news.de/boerse/news/unternehmensnachrichten/sivers-semiconductors-bets-30-million-on-glasgow-as-ai-optics-market-opens-up/70083386)
8. [ad-hoc-news.de, "Sivers Semiconductors Courts US Investors While Shareholders Weigh Dilution Risk", October 2026](https://www.ad-hoc-news.de/boerse/news/unternehmensnachrichten/sivers-semiconductors-courts-us-investors-while-shareholders-weigh-dilution-risk/70325365)
9. [Sivers Semiconductors, General Meetings page (Extraordinary General Meeting, 22 October 2026, Stockholm), retrieved 16 October 2026](https://www.sivers-semiconductors.com/investors/corporate-governance/sivers-semiconductors-general-meetings/)


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Lumentum says AI laser demand is sold out into early 2029; Sivers' $30 million plant lands in 2027 — The Inference. Canonical: https://theinference.org/article/lumentum-says-ai-laser-demand-is-sold-out-into-early-2029-sivers-30-million-plant-lands-in-2027