stockholding vs holding

stockholding and holding both are nouns.

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

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

stockholding: a specific number of stocks or shares owned
holding: something owned; any tangible or intangible possession that is owned by someone

Other hypernyms of stockholding include belongings, property.

stockholding (noun)	holding (noun)
ownership of stocks; the state or fact of holding stock	the act of retaining something
a specific number of stocks or shares owned	something owned; any tangible or intangible possession that is owned by someone