The Stockholm Stock Exchange closed with a mixed bias on Tuesday as trading resumed following the Easter holiday. The index posted solid gains during the morning session, which were subsequently eroded. Performance in Stockholm remained stronger than on leading European bourses, which recorded declines.

Market focus turned toward developments in the Iran conflict, where U.S. President Donald Trump faces a deadline at 02:00 CET on Wednesday. On the domestic front, Swedish CPI figures were released, showing a significantly lower-than-expected outcome for March.

At the close, the OMXS30 index was up 0.08 percent at 2,967.92. Shares worth approximately SEK 25.8 billion were traded on the Stockholm Stock Exchange.

Among the major industrial sectors, energy saw the best performance with a 4.1 percent increase. At the other end of the spectrum, healthcare lagged behind, falling 0.8 percent.

Among the leading stocks in the OMXS30 index, Evolution rose 2.5 percent while Alfa Laval gained 2.0 percent. The weakest performers were Addtech B, down 5.2 percent, and Saab B, which fell 2.8 percent.

Engineering firm SKF is closing its factory in Monterrey, Mexico, as part of the separation of its Automotive business, shifting production to Puebla and La Silla. Approximately 390 positions will be affected, while around 100 new ones will be created. The restructuring will incur costs of SEK 500 million, to be charged in the second quarter. The stock slipped 0.2 percent.

Industrial conglomerate Lifco entered into an agreement to acquire a majority stake in Italy-based Metalltech, a niche designer and manufacturer of expanded metal for architectural applications. The company reported sales of EUR 15.8 million in 2025 and employs 53 people. The stock rose 1.8 percent.

Technology trading group Lagercrantz has acquired British firm Michael Smith Switchgear, which has annual sales of GBP 8 million, equivalent to SEK 100 million. The stock retreated 0.2 percent.

Online brokers Avanza and Nordnet released their monthly reports for March. Avanza saw a net inflow of SEK 5,090 million, a 95 percent increase from the previous month. Nordnet reported net savings among its customers of SEK 7.8 billion, representing a 21 percent decrease compared to the prior month. Avanza's shares edged down 0.1 percent, while Nordnet rose 0.7 percent.

Furthermore, Keefe, Bruyette & Woods initiated coverage on Nordnet with an "underperform" rating. The same firm also initiated coverage on Avanza with a "market perform" rating.

The Patent and Market Court has dismissed Rototilt's patent infringement claim against industrial company Engcon and its subsidiaries. The court ruled that Rototilt's claims are covered by the legal force of a previous court ruling and has therefore chosen to dismiss the company's claims of patent infringement and injunction in their entirety. Engcon's shares climbed 1.7 percent.

Investment firm Maha Capital has completed the acquisition of fintech company Keo World and carried out directed share issues totaling USD 27 million at SEK 16 per share. The acquisition provides Maha with an established credit platform in Latin America focused on B2B payments. The stock increased 1.7 percent.

On the analyst front, Pareto Securities upgraded its recommendation for Evolution to "buy" from "hold."

Technology trading company Addtech fell after DNB Carnegie dropped its "buy" recommendation and downgraded the stock to "hold."

Engineering consultancy Sweco rose 1.6 percent following a "buy" recommendation from Dagens industri.

Oil company IPC climbed 6.0 percent after BMO upgraded its rating to "outperform" from "market perform." The stock hit a new all-time high during the day.