The Stockholm Stock Exchange is retreating slightly at midday on a report-filled Tuesday. Performance in Stockholm is lagging behind leading European bourses, which are posting modest gains. Several market heavyweights have released their interim reports, including Atlas Copco, Assa Abloy, and Boliden.

At 12:25 PM, the OMXS30 index was down 0.24 percent at 3,072.26. Shares worth approximately SEK 8.1 billion had changed hands on the Stockholm Stock Exchange.

Among the major industrial sectors, energy performed best with a 2.7 percent gain. At the other end of the scale, technology sat at the bottom, down 2.2 percent.

Among the leading shares included in the OMXS30 index, Handelsbanken A rose 1.2 percent while Nordea was up 1.1 percent. The worst performers were Atlas Copco A, down 2.7 percent, and Hexagon B, which fell 1.2 percent.

Engineering giant Atlas Copco reported an adjusted operating profit approximately 2 percent below expectations. The company's revenue and order intake were also just over 2 percent weaker than anticipated. The company expects customer activity to remain at current levels.

Mining company Boliden reported a first-quarter 2026 operating profit that beat analyst expectations, though revenue came in lower than forecast. Boliden provided updated 2026 guidance for the troubled Garpenberg mine. The stock slipped 0.3 percent.

Lock manufacturer Assa Abloy reported revenue and adjusted operating profit in line with expectations for the first quarter. Assa retreated 0.6 percent.

Packaging company Billerud's adjusted EBITDA for the first quarter was significantly weaker than analyst expectations, despite revenue coming in above consensus. The company expects to restore a strong underlying profitability level in the second quarter. Billerud plummeted over 14 percent.

Technical consultancy Sweco's EBITA came in lower than analyst expectations, while revenue was in line with consensus. Sweco fell 7 percent.

Steelmaker SSAB beat expectations for both revenue and operating profit in the first quarter. SSAB rose 0.7 percent.

AAK, which produces plant-based specialty ingredients, increased its operating profit in line with Q1 expectations. AAK climbed over 9 percent.

In contrast, forestry group Holmen's revenue and operating profit came in lower than expected. Holmen sank nearly 3 percent.

Climate control company Munters reported revenue and adjusted earnings in line with expectations for the first quarter. However, order intake provided a positive surprise. Munters was down nearly 1 percent.

Security firm Securitas released an interim report that aligned with expectations. Securitas fell 4.7 percent.

Pharmaceutical company Orexo reported lower revenue and an increased loss in the first quarter of 2026 compared to the same period last year. The company maintains a large cash position following the sale of Zubsolv US. Orexo fell over 4 percent.

Outdoor apparel brand Revolution Race significantly increased its operating profit in the third quarter of its broken fiscal year. Revenue also rose. The company noted continued sales growth during the first weeks of April. The stock plunged 13.7 percent.

Audiobook specialist Storytel reported first-quarter revenue that was lower than expected, while EBITDA was in line with forecasts. The stock retreated 5.7 percent.

E-commerce company Nelly crashed over 43 percent following its report. Operating profit fell by nearly 60 percent to SEK 8 million.

Professional kitchen equipment manufacturer Electrolux Professional saw its shares sink over 11 percent after a weaker-than-expected Q1 report.

Measurement technology firm Hexagon has finalized the timeline for the spin-off of its subsidiary Octave, which will be distributed to shareholders. Hexagon will trade ex-rights to Octave on May 21, with Octave expected to begin trading on May 25. The stock fell 1.3 percent.

S&P Global Ratings has revised its outlook for real estate company Castellum to negative from stable, while affirming its BBB credit rating. The outlook reflects a risk of a downgrade within 12-24 months if leverage remains high and operational performance weakens. Castellum dropped 1.7 percent.

On the analysis front, Nordea has downgraded Hexpol to hold from buy. The stock fell 3.4 percent.

Goldman Sachs has downgraded Bioarctic to neutral (from buy) with a price target of SEK 355. The stock was down over 5 percent.