Shares in IQE, the Cardiff-based semiconductor wafer specialist, surged by as much as 18% on Tuesday after the company announced a significant supply agreement for advanced epitaxial wafers used in artificial intelligence chips. By mid-morning, the stock was trading around 24p, giving the company a market capitalisation of roughly £200 million.
The contract, described by IQE as a multi-year deal, involves supplying custom-engineered wafers for next-generation AI processors. While the identity of the customer has not been disclosed, industry observers note that the agreement is likely with a major fabless chip designer or a large-scale foundry. IQE's technology is critical for producing compound semiconductors, which are increasingly used in high-performance computing and AI accelerators.
The news lifted sentiment across the UK semiconductor sector. IQE has faced a volatile few years, with shares falling from highs above 100p in 2021 amid a broader tech downturn and supply chain disruptions. Today's rally marks one of the strongest single-day gains for the company in 2026. Analysts at Peel Hunt described the deal as a 'significant validation' of IQE's strategy to pivot toward AI and photonics markets.
For UK investors and pension holders, the move highlights the growing role of British technology firms in the global AI supply chain. Many UK pension funds hold stakes in the FTSE All-Share index, which includes IQE as a constituent. The semiconductor sector is seen as a bellwether for UK tech investment, though volatility remains high. Analysts caution that while the contract is promising, revenue contributions are not expected to materialise until late 2026 or early 2027.
The broader FTSE 250 index was flat on Tuesday, with IQE's surge standing out against a subdued market. The FTSE 100 edged up 0.2% as investors awaited US tech earnings later this week. IQE's rally also lifted other UK chip-related stocks, with Soitec and Lattice Semiconductor seeing modest gains in sympathy.