SEC Subsidiaries API — Exhibit 21 Extraction for Corporate Structures

Access structured subsidiary data extracted from SEC Exhibit 21 filings via API. Map corporate hierarchies, jurisdictions, and ownership structures. Start free.

SEC Subsidiaries API

Public companies disclose their subsidiary entities in Exhibit 21 of their 10-K filings. Datastream extracts and structures this data — subsidiary names, jurisdictions of incorporation, and ownership percentages — so you can map corporate hierarchies programmatically without parsing HTML tables.

Capabilities

Exhibit 21 extraction

Subsidiary names, jurisdictions, and ownership percentages parsed from Exhibit 21 across all SEC filers.

Corporate hierarchy mapping

Trace parent-subsidiary relationships to understand the full corporate structure of any public company.

Jurisdiction data

See where each subsidiary is incorporated — useful for tax structure analysis and regulatory mapping.

Historical tracking

Compare subsidiary lists across years to detect new entities, dissolved entities, and jurisdiction changes.

Quick start

Get Apple’s subsidiaries from the latest Exhibit 21:

curl -H "x-api-key: $OMNI_DATASTREAM_API_KEY" \
  "https://api.secapi.ai/v1/companies/subsidiaries?ticker=AAPL"

{
  "ticker": "AAPL",
  "company_name": "Apple Inc",
  "filing_date": "2024-11-01",
  "subsidiaries": [
    {
      "name": "Apple Operations International Limited",
      "jurisdiction": "Ireland",
      "ownership_pct": 100
    },
    {
      "name": "Apple Sales International Limited",
      "jurisdiction": "Ireland",
      "ownership_pct": 100
    },
    {
      "name": "Beats Electronics, LLC",
      "jurisdiction": "Delaware",
      "ownership_pct": 100
    }
  ],
  "total_subsidiaries": 42
}

Use cases

Tax structure analysis

Map offshore subsidiaries and holding company structures to understand corporate tax strategies and identify jurisdiction-specific risks.

M&A due diligence

Before an acquisition, pull the target’s full subsidiary list to understand the scope of the corporate structure and potential liabilities.

Sanctions and compliance screening

Cross-reference subsidiary names and jurisdictions against sanctions lists and restricted jurisdictions for AML/KYC workflows.

Competitive intelligence

Track when competitors create new subsidiaries, which can signal expansion into new markets or product areas.

API endpoints

Endpoint	Description
GET /v1/companies/subsidiaries	Subsidiaries for a company
GET /v1/companies/subsidiaries/history	Historical subsidiary lists

Why Datastream for subsidiary data

Feature	Datastream	Raw EDGAR	Bureau van Dijk	Manual research
Structured JSON API	Yes	No (HTML tables)	Yes	N/A
Automatic extraction	Yes	No	Yes	No
Historical comparison	Yes	Manual	Yes	Manual
REST API access	Yes	No	Partial	No
Coverage	All 10-K filers	All 10-K filers	Global	Per-project
Pricing	Pay-as-you-go	Free (raw)	$$$$	Labor cost

Get started

Get your API key

Start mapping corporate structures in under 60 seconds. 250 free API calls per month.

• SEC EDGAR API
• Company Search API
• API Reference