Silex, a pure-play MEMS foundry, has set the price for its IPO in Stockholm.

      The MEMS foundry backed by Bure Equity and Creades was priced at SEK 81 per share, with the offering being oversubscribed multiple times. Key cornerstone investors such as Capital Research, Fidelity, AFA, AP2, AP3, AP4, Swedbank Robur, and Carnegie accounted for about three-quarters of the deal.

      On its debut on Nasdaq Stockholm, Silex Microsystems experienced a significant increase in share price, with the stock rising early on following the IPO price of SEK 81 per share. The offering was heavily oversubscribed during the bookbuilding process and was primarily allocated to institutional cornerstone investors, resulting in limited availability for retail investors on the opening day.

      The offering raised roughly SEK 1.99 billion ($217 million) through a sale of 24.6 million shares, leading to an equity valuation of approximately SEK 8.9 billion at the time of the IPO. The trading symbol assigned is SILEX, with settlement expected to occur on May 11.

      Silex positions itself as the leading pure-play MEMS foundry globally, producing micro-electromechanical systems for clients across various sectors, including automotive, industrial, life sciences, and consumer electronics. The company operates a single fabrication facility in Järfälla, just outside of Stockholm, focused on 200mm wafer production.

      The pure-play model means that Silex manufactures chips designed by other companies, similar to TSMC's role with fabless semiconductor designers, but within the smaller MEMS sector.

      The financial performance associated with the IPO is notably robust for a recent European chip listing. For the year ending December 31, 2025, the company reported net sales of SEK 1,385 million, with an EBIT of SEK 368 million, resulting in an operating margin of approximately 27 percent. The figures for the first quarter of 2026 were even more impressive, with revenues of SEK 375 million and EBIT of SEK 128 million, indicating an operating margin exceeding 34 percent. Such strong metrics are appealing to the institutional cornerstone investors who predominantly engaged in the offering.

      The cornerstone investor base, representing the substance of the announcement, is expected to influence the stock's trading dynamics. Cornerstone investors collectively acquired ordinary shares worth approximately SEK 1.501 billion, which corresponds to about 75 percent of the offering. This group includes Creades, AFA Insurance, Tredje AP-fonden, Capital Research Global Investors, Swedbank Robur Fonder, Fjärde AP-fonden, Andra AP-fonden, Fidelity International, and Carnegie Fonder.

      The participation of three Swedish national pension funds, major Swedish fund managers, substantial US institutional investors, and the largest insurance company in Sweden reflects a notably strong cornerstone book for a chip listing in Stockholm.

      Post-IPO ownership remains concentrated, with Bure Equity retaining around 34.2 percent of the outstanding ordinary shares, while Creades holds about 10.1 percent. Bure and Creades led the initial investor group that purchased Silex from its previous owner aligned with the Chinese state in 2023, marking a return of the company to Swedish ownership after approximately seven years under Sai MicroElectronics.

      This ownership transition carries significance: during the latter half of the 2010s, Silex functioned as a Swedish-based fab within a Chinese corporate structure until geopolitical shifts in 2022 and 2023 rendered that arrangement commercially and politically unfeasible.

      The MEMS market has been experiencing growth driven by AI-related demand. Recent contracts include a high-volume manufacturing collaboration with Norwegian audio company sensiBel for studio-quality MEMS microphones, where underlying processor demand is being fueled by on-device AI workloads prevalent throughout the semiconductor industry.

      Silex’s client base encompasses a diverse range of end-markets, and the same demand trends supporting global foundry capacity expansions contribute to the pure-play MEMS operator successfully completing its IPO in Stockholm at this valuation multiple.

      However, two questions remain unanswered in the public discourse. The first pertains to the extent of Wednesday's initial share price movement; while Bloomberg reported significant increases, the exact percentage remains unclear in subsequent analyses. The second question involves the intended use of the IPO funds by Silex.

      According to the prospectus, funds are earmarked for expanding capacity at the Järfälla facility and for enhancing balance-sheet flexibility to pursue selective acquisitions within the broader MEMS supply chain. Investors will closely monitor whether the company can utilize this capital effectively, especially in conjunction with the prevailing AI-driven demand cycle, as evidenced in future quarterly reports.

      For the moment, the IPO has achieved its objectives. Silex has established a public market valuation of around SEK 8.9 billion in enterprise value, attracted a solid cornerstone investor base, and provided Bure Equity and Creades with a partial exit pathway while maintaining a combined controlling interest. The next key milestone will be the Q2 earnings report