A separate legal entity whose corporate governance and policies are controlled, directly or indirectly, by another company (the parent) through mechanisms that confer de facto control—commonly a majority of voting shares, board appointment rights, or binding governance agreements.

Principle

Control over a company is defined by the practical ability to direct its management or policy; when that ability exists, the controlled entity functions as a subsidiary even if legal form or minority holdings complicate ownership labels.

Demonstration

Illustrative scenario — Situation: Company P acquires 60% of voting shares in Company S. Recognition: P therefore has the practical ability to appoint a majority of S’s board. Action: P sets strategic targets and appoints executives aligned with those targets. Consequence: S implements P’s strategy while remaining a distinct legal entity with its own contracts and liabilities.

Misapplication

Mistaking any equity investment for a subsidiary — for example, treating a minority stake or mere contractual influence as subsidiary status. The error is conflating ownership interest with control; minority holdings commonly convey influence but not decisive control.

Consequence

Because control exists, the parent can direct strategy, consolidate decision-making and require coordinated policies; the subsidiary nevertheless retains separate legal obligations, so control changes governance outcomes without necessarily merging legal responsibility.

Reversal

Control can arise without majority share ownership (for example via shareholder agreements, rights to appoint directors, or economic dependence). Conversely, a majority stake may be legally constrained by agreements or statutory protections that limit the parent’s effective control.

Boundary

Clearly within: an entity in which another company has the practical ability to appoint a majority of directors or otherwise direct policy. Boundary case: a firm with significant minority rights (e.g., veto or golden shares) where classification depends on the precise governance mechanics. Clearly outside: an associate or affiliate in which only significant influence exists but the ability to direct policy is absent.

Semantic Tension

Centralized control ↔ Subsidiary operational autonomy: parents balance strategic direction against preserving subsidiary-level decision-making necessary for local adaptability.

Synthesis

A subsidiary is primarily a vehicle of control: it preserves legal separateness while enabling a controlling company to direct strategy and governance; correctly identifying it requires assessing who practically directs policy rather than relying solely on percentage ownership.