Is Sweden a Socialist country?

No. Since about 1935 Sweden has had a capitalist economy governed by social democratic policies, including with high, redistributive income tax rates and general welfare benefits (even when under conservative governments). After 1935, a collective bargaining scheme was set up which gave both unions and businesses representation and a forum to mediate disputes. This form of class collaboration was intended to stave off socialist ideas of abolishing capitalism for a socialist economic system. The majority of industries in Sweden are privately-owned, with very few collectively-owned and publicly-owned firms.

The Swedish economic model, which has been similar to other Scandinavian countries and therefore are called the "Scandinavian model" or "Nordic model", has the goal of creating a welfare state, not a state based on collective ownership.

Large private-owned companies from Sweden is i.e. IKEA, H&M and Ericsson. The existence of large privately-owned companies is not compatible with the definition of socialism.