It depends on the currency in question, but for most of them, specifically no: they aren't "issued" by the company in question or even really related to them in

It depends on the currency in question, but for most of them, specifically no: they aren't "issued" by the company in question or even really related to them in any way. They're only in a position to gain from a coin purchase if they happen to have done the mining themselves (which they generally don't). All these ICOs are just blockchains branded by a certain company.