Not sure about others in fennoscandia, but at least Finland has multiple large co-ops. One of the largest banks, OP ( literally named co-op bank) is a co-op which many own a part of. Many of my friends are part of the co-op.

Also, Finland’s largest retail chain (with 48.3 % market share of retail in Finland) is a consumer co-op, which is also causing a very difficult situation for all other businesses in retail, as they’re able to undercut practically everyone since they have less of a profit incentive. 2.4 million people have a membership, which is quite a sizable amount in a country of under 6 million (though I’m not sure if the number includes Estonians as well)