European tech stocks in Q3 2026

A faster data centre needs a way to move information between its processors. A navy needs to deal with underwater mines. A factory needs to control who can reach its systems. Each problem creates an opening for companies with rather specialised knowledge.

That is part of the appeal of exploring Europe’s smaller technology businesses. Their products can sit several steps away from the names everyone recognises, while doing something essential to the finished system. Announcements from July to September 2026 offer five different ways to follow that connection between technology and demand.

Semiconductors: AIXTRON supplies the machinery behind optical connections

AIXTRON SE makes equipment used to build compound semiconductor components, including the lasers that help move data through optical networks. Its customers manufacture the components; AIXTRON supplies machinery for producing them.

In its 30 July update, the German company reported strong demand for optoelectronic equipment and said major shipments of systems for laser production were expected to begin during Q3. An earlier order announced in May makes the connection to AI more concrete: Lumentum selected AIXTRON equipment to expand production for high-speed optical networks serving AI data centres.

This gives AIXTRON a role in the infrastructure supporting AI, alongside its other semiconductor markets. Those markets were moving at different speeds. The July report still described weak demand in power electronics and lower first-half revenue than a year earlier. Growing orders were encouraging, but customers still needed to receive the machines before that demand could fully appear in sales.

Robotics: Exail takes mine clearance onto smaller boats

Exail Technologies SA combines underwater vehicles, positioning equipment and software to help navies identify and neutralise mines. The practical challenge includes getting that equipment where it is needed.

On 15 July, Exail announced an order from a European navy for three light mine-countermeasure systems deployed from rigid-hulled inflatable boats. Exail says the setup can be operated by three crew members and is designed for very shallow water and places where larger vessels cannot operate.

The appeal is in the complete working package: vehicles to approach a suspected mine, positioning to locate them and software to coordinate the operation. A smaller boat gives the technology another route into use.

The quarter also brought a significant ownership development. Thales and Exail signed an agreement setting out a planned takeover, subject to regulatory approvals. Anyone following the company’s shares needs to follow that transaction alongside the maritime robotics business.

Space: OHB secures a role in Europe’s communications network

OHB SE shows how Europe’s ambitions for more independent infrastructure can become work for a listed technology supplier.

On 31 August, the German space company announced a contract worth nearly €1 billion with satellite operator SES. OHB will develop and build eighteen satellite platforms for the medium Earth orbit part of IRIS², the EU’s planned secure communications network.

The programme is intended to provide resilient communications for public and private users, including services supporting critical infrastructure. For OHB, the announcement identifies a customer, a defined engineering role and a substantial programme of work.

It also brings a long delivery timetable. OHB’s announcement put the first IRIS² launches in 2029 and initial services in 2030. The next few years of engineering and production will matter as much as the contract signature.

Cybersecurity: WALLIX follows the connections into the factory

WALLIX GROUP SA develops software to control access to sensitive systems. In an industrial setting, that means managing connections involving people and machines, with the permissions appropriate to their jobs.

On 24 September, WALLIX announced that Deloitte Germany had joined its international alliance programme. The companies plan to develop industrial demonstrations at Deloitte’s Smart Factory Lab in Düsseldorf, focusing on identity and access controls across connected environments, including AI agents.

For a smaller software supplier, a consulting and integration partner can help customers fit the product into a larger project. That is the commercial possibility here. The announcement describes a partnership and planned demonstrations; customer deployments and sales will show how much business follows.

Biotech: ProQR takes another RNA-editing candidate into human testing

ProQR Therapeutics N.V. is developing treatments that edit RNA, the instructions cells use to make proteins. Its approach recruits editing machinery already present in human cells.

On 9 September, the Dutch company announced that the first healthy volunteer had received AX-0811 in a Phase 1 trial. The candidate is designed to alter a protein involved in transporting bile acids into liver cells. The aim is to reduce harmful bile-acid accumulation in certain liver diseases.

That is an interesting use of RNA editing: changing how a protein behaves to address a specific biological problem. But this remains early clinical development. The study examines safety, how the treatment behaves in the body and signs that it affects its intended target. It does not yet establish that it improves patients’ health.

ProQR’s September announcement set the next checkpoint for early January 2027, when it expected target-engagement results from the first two groups of participants. Those results should give readers a more concrete basis for following the AX-0811 programme.