Sivers Semiconductors Bets $30 Million on Glasgow as AI Optics Market Opens Up

Sivers commits $30M to expand its Glasgow laser fab, targeting a $4B optical amplifier market as its pipeline hits $1.2B and shares slide 31% in 30 days.

Sivers Semiconductors is putting serious money behind its photonics ambitions. The Swedish chipmaker has committed $30 million to expand its laser fabrication plant in Glasgow, a move that will lift annual capacity beyond 100 million CW-DFB lasers once the buildout wraps up. Construction is slated to kick off in the second half of 2026, with the facility expected to be operational by the fourth quarter of 2027.

Those components sit at the heart of optical transmission systems, a segment enjoying a demand surge fueled by data center and AI infrastructure spending. The Glasgow expansion also marks a strategic shift: Sivers is moving away from a pure fab-lite approach toward a hybrid manufacturing model that combines in-house capacity with external foundry partners.

A $4 Billion Addressable Market Emerges

Buried in the company's interim report released roughly a week ago was a figure that had drawn little attention until now. Sivers pegs the addressable market for semiconductor optical amplifiers used in optical switches for AI data centers at $4 billion. The company intends to leverage its indium phosphide photonics expertise to capture a slice of that opportunity, positioning these amplifiers as a way to handle the massive data throughput that modern AI infrastructure demands.

That newly identified market feeds into a broader pipeline story. Sivers' total opportunity pipeline stood at $1.2 billion as of July — a 268% jump compared to the end of 2025. The growth comes from multiple directions at once: the fresh optical amplifier market, ongoing production ramps such as those at Tachyon Networks, and initial program orders from SemiNex. The company is transitioning from development-stage projects toward serial production revenue.

Q2 Numbers Show the Transition Underway

The second-quarter results offer a snapshot of that shift. Product revenue rose 18% year-over-year on a currency-adjusted basis, even as total revenue came in at SEK 53.8 million — a 12% decline attributed to timing shifts on individual orders. Adjusted EBITDA landed at minus SEK 35.5 million, weighed down in part by a non-cash social security contribution charge of SEK 42.9 million tied to the rising share price.

Management framed the earnings dip as a deliberate reallocation of resources away from development contracts and toward upcoming production launches. That strategy puts 2027 squarely in the spotlight as the pivotal year when pipeline opportunities are expected to convert into firm revenue.

Share Price Tells a More Complicated Story

The market's reaction has been anything but straightforward. The stock closed Wednesday at EUR 2.75 before falling 5.9% on Thursday to EUR 2.59. Over the past 30 days, shares have shed 31% — a stretch that absorbed both the August earnings report and concurrent discussions about capital measures. At one point, the stock managed a 6.8% weekly recovery before the latest weakness erased those gains.

No clear public catalyst explains Thursday's drop. The Glasgow investment was announced a week earlier and hardly accounts for the move on its own. The sharp swings fit a stock that has become known for dramatic price action — its 30-day volatility sits at an annualized 153%.

Sentiment has been equally erratic. At one point the stock traded pre-market at EUR 2.80, roughly 16% above its level from seven days prior. Even so, shares remain 73% below their 52-week high of EUR 10.23, a gap that underscores just how volatile the market's reassessment of the growth story has been.

US Listing Preparations Continue

Alongside the capacity buildout, Sivers is pressing ahead with preparations for a potential secondary listing in the United States. Management indicated during the quarterly report that it aims to be trading-ready by early 2027. Such a listing could open the door to additional US investors active in the optics and AI infrastructure space — precisely the arena Sivers is targeting with its Glasgow expansion.

For investors, the picture remains murky. A growing pipeline and a concrete capacity expansion sit on one side of the ledger. On the other, a stock that has lost nearly a third of its value in a month. Whether operational progress translates into steadier valuations will likely become clearer only when the next quarterly figures arrive.