Both the broad index OMXSPI and the large-cap index OMXS30 closed at new record levels.
The top performer on the OMXS30, which rose 2.1 percent, was technology trading company Addtech, up 5.7 percent. This was followed by pharmaceutical company AstraZeneca, up 5.1 percent, following positive results from a phase 3 trial.
Defense group Saab rose 5 percent. Several European defense stocks also climbed in the wake of concerns that have arisen following US President Donald Trump's statements that the US "needs Greenland."
Engineering company Atlas Copco climbed 4.3 percent after a buy rating from Bernstein.
At the bottom of the large-cap index were the major banks. Handelsbanken fell the most, down 2.4 percent. Nordea closed down 1.3 percent.
Munters, which supplies air cooling systems for data centers, fell 6.3 percent after Nvidia CEO Jensen Huang said the next generation of chips will not require as much water cooling.
Volvo Cars fell nearly 2 percent after a sell-off from major bank Citi. The automaker also released sales figures that showed an increase in December but a decline in sales for the full year 2025.
At the close in Stockholm, the stock exchanges in Frankfurt and Paris were trading up, as were two of the three major indexes in New York.
The price of oil has fallen below $60 per barrel after Donald Trump's statements that Venezuela will send up to 50 million barrels of oil to the United States.
