Wholly-Owned Subsidiary is a subsidiary whose voting shares are 100% owned by a single parent company, leaving no minority shareholders.
A wholly-owned subsidiary (WOS) is a company in which 100% of the voting equity is held by a single parent, directly or through other intermediate holding entities.
Because no third-party shareholders exist, the parent has full economic and governance rights over the subsidiary and is not constrained by minority protections, statutory tag-along rules, or shareholder vote thresholds beyond what the law requires for any company.
Wholly-owned subsidiaries are popular for international expansion when the founder wants to keep complete strategic control over a new market entry, for ring-fencing intellectual property in a separate IP holding company, and for isolating regulated activities such as broker-dealer or insurance operations.
They are also a common vehicle for cross-border mergers, where the acquirer establishes a WOS in the target's country to merge with the target.
Operationally, a WOS still needs its own board, statutory accounts, and tax registrations, even if its directors are appointed solely by the parent. Many jurisdictions allow simplified annual filings or small-company exemptions for wholly-owned subsidiaries that meet size criteria.
You will see the WOS structure when reading prospectuses describing a group's overseas operations, when a multinational sets up a local entity to bid on government contracts, or when a private equity sponsor packages an acquisition through a newly formed acquisition vehicle. Founders often convert their original startup into a WOS of a new top holdco during a flip-up to Delaware.
The term also appears in foreign direct investment filings, where regulators distinguish between WOS and joint venture entry modes.
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