I imagine that it would be even easier to look at European companies, as there has been lots of border changes there.
According to a quick search into Finnish companies, the currently oldest one (Fiskars, founded in 1649) has survived the transitions from Swedish rule to Russian rule (1809) and to independence (1917). The owners have changed several times. The oldest one that remained in the same family seems to be Frenckells printshop, which survived from 1642 to 2008.
According to a quick search into Finnish companies, the currently oldest one (Fiskars, founded in 1649) has survived the transitions from Swedish rule to Russian rule (1809) and to independence (1917). The owners have changed several times. The oldest one that remained in the same family seems to be Frenckells printshop, which survived from 1642 to 2008.