The British telecoms regulator Ofcom announced on Thursday that it is opening a review of Ericsson's subsidiary Vonage. Ericsson shares fell 3.1 percent.
The Wallenberg sphere's venture capital company EQT fell the most on the large-cap list, down 4.2 percent.
Defense group Saab also lost, down 2.6 percent after Wednesday's gain of 2.9 percent.
Clothing giant H&M fell 2 percent, after the company presented its interim report in the morning.
Against the tide were Handelsbanken and Telia, up 0.7 and 0.3 percent respectively.
Wall Street's three leading indexes are in the red in early trading, down between 0.5 and 0.8 percent. Oil prices have continued to rise, which in turn has pushed U.S. 30-year Treasury yields to their highest level since 2004.
A barrel of North Sea oil (Brent) now costs $108.
