stockholding vs ownership

stockholding and ownership both are nouns.

Word	Noun	Adjective	Verb	Adverb
stockholding	Yes	No	No	No
ownership	Yes	No	No	No

As nouns, ownership is a hypernym of stockholding; that is, ownership is a word with a broader meaning than stockholding:

stockholding: ownership of stocks; the state or fact of holding stock
ownership: the relation of an owner to the thing possessed; possession with the right to transfer possession to others

stockholding (noun)	ownership (noun)
ownership of stocks; the state or fact of holding stock	the act of having and controlling property
a specific number of stocks or shares owned	the relation of an owner to the thing possessed; possession with the right to transfer possession to others
	the state or fact of being an owner