Subsidiary Data

Overview

The WRDS Subsidiary dataset provides parent–subsidiary ownership relationships for publicly traded US companies, derived from SEC Exhibit 21 filings.

What you can find here:

• Subsidiary names: names of subsidiaries owned by public companies
• Parent companies: the publicly traded parent (linked by CIK/GVKEY)
• Jurisdiction: state or country of incorporation of each subsidiary
• Ownership structure: which entities own which subsidiaries

This data is useful for research on corporate structure, multinational operations, tax planning, and geographic footprint analysis.

WRDS Access

• WRDS web interface: Subsidiary Data
• Python API library: subdiary
• Data dictionary: Link

Example

import wrds
conn = wrds.Connection()

# List available tables
conn.list_tables(library='subdiary')

For more examples, see the Python API notebook.