A trademark belongs to the first person, company or organisation that registers and uses the trademark. Depending on the jurisdiction, trademark can be owned by merely using it in commerce without a registration, however, in most jurisdictions registration is mandatory. Besides it is beneficial to register trademarks in all jurisdictions for evidentiary purposes.
If you would like to know to whom a particular trademark belongs, you can check the information about the “Applicant” or the “Owner” in the trademark databases, like:
https://www.tmdn.org/tmview/welcome#
