noun
property; possession; belongings
Refers to something owned by a person or entity; a formal or legal term for one's possessions.
この土地は私の所有物です。
This land is my property.
彼の所有物はすべて競売にかけられた。
All his possessions were put up for auction.
持ち物 is more casual and refers to things one carries or has with them, whereas 所有物 is a formal term for owned property.
Compound of 所有 (shoyū, 'ownership') + 物 (butsu, 'thing'). The reading is on'yomi throughout.