A wholly owned subsidiary is a company whose entire issued share capital is owned by a single parent company, with no outside shareholders holding any equity. The parent company exercises complete control over the subsidiary's board of directors, strategic decisions, and operations. Despite the full ownership, the subsidiary is a legally separate entity: it has its own corporate existence, can enter contracts in its own name, and its debts are not automatically the parent's obligation. Tesla owns SolarCity, Nike owns Converse, and Alphabet owns Google, all as wholly owned subsidiaries.
Think of a wholly owned subsidiary like a wholly owned vacation home: you own it completely, but it is still a separate piece of property with its own address, insurance, and tax bill.
Operating through subsidiaries rather than as a single consolidated entity serves several strategic and legal purposes.
A parent company that wholly owns a subsidiary must consolidate the subsidiary's financial statements into its own under both U.S. GAAP and International Financial Reporting Standards. Consolidation eliminates intercompany transactions between parent and subsidiary, meaning loans, sales, and management fees between the two entities are eliminated in the consolidated statements to avoid double-counting.
Investors analyzing a parent company's consolidated balance sheet and income statement are seeing the combined financial position of the parent and all its consolidated subsidiaries as if they were a single economic unit. To understand a specific subsidiary's standalone performance, you need to look at the subsidiary's separate financial statements if they are publicly filed, which they often are not for private wholly owned subsidiaries.
Creating a wholly owned subsidiary requires incorporating a new legal entity, with the parent as the sole shareholder. Proper maintenance means holding separate board meetings, maintaining separate bank accounts and accounting records, having the subsidiary enter contracts in its own name rather than the parent's, and ensuring adequate capitalization so the subsidiary can meet its own obligations without depending entirely on parent support.
Undercapitalized subsidiaries that operate as pure extensions of the parent without genuine independence are vulnerable to veil-piercing claims by creditors who can argue the subsidiary fiction should be disregarded to reach parent assets.