The Stockholm Stock Exchange ended Thursday's trading session with a significant decline. After opening lower, the market saw a midday uptick, only to fall again towards the close. The performance of the leading European stock markets mirrored that of Stockholm. A number of quarterly reports were noted in the news flow.

At the close, the OMXS30 index was down 1.31 percent at 3,077.21. Shares worth approximately 23.0 billion kronor were traded on the Stockholm Stock Exchange.

The energy sector posted the best performance among the major industrial sectors, rising by 1.2 percent. In contrast, raw materials lagged behind, ending at the bottom with a decline of 1.8 percent.

Among the leading stocks included in the OMXS30 index, Evolution rose 1.3 percent while Telia was up 0.7 percent. Saab B had the weakest performance with a drop of 5.1 percent, while Boliden fell 2.8 percent.

Medical technology company Elekta reported an adjusted operating profit and order intake for the third quarter in line with consensus, while revenue was slightly lower than expected. The stock traded ex-dividend of 1.20 kronor today and was down 1.6 percent.

Ventilation company Systemair's adjusted operating profit and revenue came in clearly below expectations for the third quarter. The stock fell 6.7 percent.

Online broker Avanza Bank's Private Banking clients will soon have access to analyses from Kepler Cheuvreux, according to Finwire. The stock rose 0.1 percent.

Oil and gas company Shamaran reported a substantial increase in profit and revenue for the fourth quarter. The stock fell 2.6 percent.

Medical technology company Integrum saw its revenue decrease and operating loss increase to -9.5 million kronor in Q3. The stock fell 9 percent.

Medical technology company Sectra is acquiring Lithuanian firm Oxipit, which specializes in AI-based solutions for radiology. The stock fell 1.9 percent.

Betting and affiliate company Better Collective has launched a share buyback program worth 40 million euros. The stock rose 0.6 percent.

Pareto Securities upgraded Traton to buy from hold, with a target price of 380 kronor (previously 320). The stock fell 0.4 percent.

EFN issued a buy recommendation for Inission, and the stock increased by 4.3 percent.

Morgan Stanley upgraded Alfa Laval to equal weight from underweight, with a target price of 500 kronor. The stock rose 0.4 percent.