の所有者は

the owner of ...

→ の
phrase Rare #37,467
the owner of ... は marks the owner as the topic; a description or identification usually follows.
JA: この店の所有者は妹です。
EN: The owner of this store is my younger sister.

私達の家の前の所有者はリバプールに引っ越した。

The previous owner of our house moved to Liverpool.

この家の所有者は山田さんだ。

Mr. Yamada is the owner of this house.

このビルの所有者は何度も変わっています。

The ownership of this building has changed hands many times.

元の所有者はアンソニーたちに首まで借金をしていた。

The previous owner was up to his neck in debt to Anthony and his associates.