A private enterprise: a company owned and operated by private individuals or capital, distinguished from public or state-run enterprises.
私企業は市場の変化に素早く対応することが多い。
Private enterprises often respond quickly to market changes.
政府と私企業が協力してプロジェクトを進める予定だ。
The government and private enterprises plan to cooperate on the project.
彼は大手の私企業に勤めている。
He works for a large private company.