Since it is a Cartel Market companion and will be unlocked in your collections on use, yes it is account wide if you pay the cartel coins in your collections to claim it for all your other chars.

Fur future reference, if any item has a Cartel Market symbol and the tooltip says something about whether it has been unlocked in your collections or not, that item can be unlocked account wide in your collections by paying cartel coins.

If a particular item has neither a Cartel Market symbol attached to it nor the tooltip says anything about collections, it will be bound to that particular character on use and cannot be unlocked for your account.