TLDR:
A mother company (parent company) is a corporation that owns a controlling stake in one or more subsidiary companies, exercising overall direction and strategic oversight.
Corporate Structure Implications
The relationship between a mother (parent) company and its subsidiaries creates significant legal and financial implications. The parent company typically exercises control through board appointment rights, voting control of subsidiary shares, and financial consolidation. In consolidated financial statements, the parent company presents the financials of all subsidiaries as a single economic unit, which can mask subsidiary-level performance. Intercompany transactions — loans, services, and royalties between the parent and subsidiaries — must be conducted at arm’s length to avoid tax transfer pricing issues.