i happily own TRV. have it in a DRIP plan thru brokerage.
and it is DIRT cheap to buy into these behemoths. trading at 9 times earnings. and by the way, they deal in problems. get used to it.
and the answer to the question you didn't ask: I bought in because i wanted a company that had relatively light exposure to a recession. most insurance is a nondiscretionary purchase. and pricing is only weakly correlated with the health of the economy in most lines.