The Stockholm Stock Exchange wrapped up the year with broad-based gains.

At the close, the OMXS30 index was up by 0.67 percent at 2,882.97. Shares worth approximately 16.4 billion kronor were traded on the Stockholm Stock Exchange.

Among the major industrial sectors on the exchange, Basic Materials performed best with a rise of 0.9 percent. On the other end of the spectrum, Utilities lagged behind with a decline of 0.3 percent.

Among the leading stocks included in the OMXS30 index, Saab rose by 2.7 percent, while Epiroc was up 1.8 percent. The weakest performer was H&M B, which slipped by 0.1 percent.

Defense giant Saab climbed after announcing a major new order from France. Europe's third-largest economy will purchase two GlobalEye surveillance and command systems, including ground equipment, training, and support. The order is valued at approximately 12.3 billion kronor, with deliveries scheduled for 2029-2032.

Commodity companies were winners on the back of rising prices. Lundin Mining gained 2.4 percent, Boliden rose 1.5 percent, and Lundin Gold advanced 1.8 percent.

There were several major winners during Tuesday's trading. One of them was the medical technology company Episurf, which announced a real estate deal worth just over 1.1 billion kronor, involving several property profiles. The deal will need to be approved at a shareholders' meeting. The medtech stock, which had been halted ahead of the news, surged 29.3 percent on the announcement.

Another big winner was Netel, which soared around 22.3 percent. The infrastructure network company announced it had entered into new agreements with SEB, Svensk Exportkredit (SEK), and Swedbank for long-term financing with a liquidity covenant. The agreements run until June 30, 2027, ensuring a long-term stable financing solution for the group.

Telecom supplier Ericsson rose 0.6 percent. According to L'Economiste, the company has initiated legal action in Morocco against Chinese mobile manufacturer Transsion for alleged patent infringement.

Pattern generator company Mycronic announced several orders. The tech stock rose 0.4 percent, thus underperforming the broader market despite the multiple orders.