After the Christmas break, the Stockholm Stock Exchange saw minor gains by midday on Monday. Trading has been somewhat subdued, except for defense stocks, which are declining following Donald Trump's meeting with Volodymyr Zelenskyj.

At 12:53 p.m., the OMXS30 index was up 0.31 percent at 2,857.85. Shares worth approximately 4.7 billion kronor had been traded on the Stockholm Stock Exchange.

All major sectors were on the rise. The energy sector led among the exchange's larger industry segments, with an increase of 1.09 percent.

Among the leading stocks included in the OMXS30 index, Boliden rose by 1.6 percent, while Evolution was up 1.5 percent. The weakest performer was Saab B, down 1.7 percent, while ABB fell by 0.5 percent.

Swedish defense stocks traded lower due to the summit on the conflict in Ukraine, where Trump expressed optimism about a peace agreement being close at hand. Saab was down 1.7 percent and Mildef dropped around 5 percent.

Concejo's share price surged by 17.3 percent. The investment company is selling its 71.3 percent stake in the Norwegian portfolio company Det-Tronics. The purchase price is 190 million kronor on a cash and debt-free basis.

Bonava slipped 0.2 percent. The real estate company announced it has sold rental housing projects in Germany for 96 million euros.

A clear gain of 4.6 percent was seen in Arion Bank's share. The bank announced its intention to buy back shares for up to 5 billion Icelandic kronor in Sweden and Iceland.

Construction company Skanska announced a new order in Boden worth 280 million kronor. The stock declined by 0.2 percent.

Vehicle safety company Autoliv's CFO, Fredrik Westin, has agreed with the company to postpone his departure until the end of March 2026. He announced his resignation in June this year and was originally set to leave the company at year-end. Autoliv rose 1.4 percent.

Micro-machining producer Acuvi released preliminary financial figures for 2025. Revenues are estimated to have increased by 15 percent to around 202 million kronor. However, the company announced it will not meet its previously communicated EBITDA forecast for the year of 52-55 million kronor, but did not provide further guidance on results. Acuvi plummeted 18.8 percent.

Grangex has entered into a strategic agreement with mining giant Anglo American for the resumption of operations at the Sydvaranger mine near Kirkenes in northern Norway. The agreement is described as a key milestone and includes, among other things, Anglo American waiving royalties of 37 million dollars in exchange for an exclusive 100 percent offtake agreement for the mine's lifetime. Grangex surged 21.2 percent.

Bonesupport climbed 4.3 percent after DNB Carnegie reiterated its positive stance on the medtech company, stating that the valuation appears attractive given its growth potential.

DNB Carnegie is also positive on biotech company Biogaia, raising its price target to 140 kronor (from 130) with a reiterated buy recommendation. The stock rose 3.3 percent.

SB1 Markets was active in initiating coverage of Swedish banks. A neutral rating was assigned to Nordea, Swedbank, Handelsbanken, and SEB. All the shares were down at midday, except for SEB, which posted a slight gain.