A parent company's equity stake in a subsidiary can range from just over 50% to 100%. When the stake is 100%, the subsidiary is known as a wholly owned subsidiary. If the equity position is between 20% and 50%, the company is an affiliate or associate, not a subsidiary.
Despite the legal separation between subsidiaries and their parents, overlap often exists in decision-making and finance. The parent usually holds most of the subsidiary's voting shares, giving it control over the board of directors and other decisions subject to shareholder voting. Additionally, the parent may guarantee the subsidiary's debt.