AstraZeneca is the worst performer among the OMXS30 companies, down 6.5 percent, after reports in the Financial Times about a merger with American competitor Bristol Myers Squibb.
The decline means that AstraZeneca's share price is now at its lowest since October 2025.
Among the major companies, measurement technology company Hexagon is performing particularly well, with its shares rising 3.2 percent. Air-source heat pump manufacturer Nibe is also performing strongly, with an increase of 2.7 percent.
The general rise on the Stockholm Stock Exchange is in line with developments across Europe. During the morning, the oil price has fallen by about 4.7 percent amid new optimism about a solution to the Iran conflict. President Donald Trump has said that new talks will begin on Monday.
