Company and governance data
Subsidiaries
https://api.sec-api.io/subsidiariesSearch the current and historical subsidiaries of companies listed on US stock exchanges, from 2003 to present. The dataset holds more than 100,000 subsidiary lists, converted to JSON from Exhibit 21 of 10-K, 10-Q, S-1 and 20-F filings, and new lists are added as soon as EDGAR publishes the filing.
Authentication
Send the API key either as a header or as a query parameter. The header is preferred; the query parameter exists for cases where a header cannot be set, such as opening a URL directly in a browser.
Authorization: required header
The API key on its own. Do not prefix it with Bearer or any other word.
Example Authorization: YOUR_API_KEY
token: optional query parameter
The API key, appended to the URL. Use this only when a header is not possible.
A JSON object. Content-Type must be application/json.
query: required string
The search expression in Lucene syntax, written as field:value. Every field listed under Searchable fields can be used, combined with AND, OR, NOT, ranges and wildcards.
Example ticker:AAPL
from: string, Maximum 10000
Index of the first result to return, used for pagination. Increment by the value of size to page through results.
Default "0"
size: string, Maximum 50
Number of subsidiary lists to return in one response.
Default "50"
sort: array of object
Sort order. Each item maps one field to an order object, for example [{ "filedAt": { "order": "desc" } }].
Default [{ "filedAt": { "order": "desc" } }]
order: string
Either asc or desc.
Searchable fields
Every field below can be used inside query. 8 fields are searchable, and they match the structure of the objects returned in the response.
| Field | Description |
|---|---|
id | System-internal unique identifier of the list of subsidiaries |
accessionNo | Accession number of the EDGAR filing Exhibit 21 is attached to |
filedAt | Date the list of subsidiaries was disclosed |
cik | CIK of the parent company |
ticker | Ticker symbol of the parent company |
companyName | Name of the parent company |
subsidiaries.name | Name of the subsidiary |
subsidiaries.jurisdiction | Jurisdiction of the subsidiary (state or country) |
A JSON object. Nested attributes are collapsed; expand one to see its fields.
total: object
How many subsidiary lists matched the query.
value: integer
Number of matching subsidiary lists.
relation: string
Either eq, meaning value is exact, or gte, meaning value is a floor.
data: array of object
The matching subsidiary lists, at most size per response. One item represents one Exhibit 21 disclosed by one parent company in one filing.
id: string
System-internal unique identifier of the list of subsidiaries.
accessionNo: string
Accession number of the EDGAR filing Exhibit 21 is attached to, for example 0000320193-25-000079.
filedAt: string
Date the list of subsidiaries was disclosed, ISO 8601 in Eastern Time, for example 2025-10-31T06:01:26-04:00.
cik: string
CIK of the parent company, leading zeros removed, for example 320193.
ticker: string
Ticker symbol of the parent company, for example AAPL.
companyName: string
Name of the parent company, for example Apple Inc.
subsidiaries: array of object
The subsidiaries of the parent company, as disclosed on this Exhibit 21.
Status codes
200 | Success. The response holds total and data. |
400 | The request body could not be parsed, the Lucene expression in query is malformed, or size is above 50. |
403 | The API key is missing, or it is not valid. |
429 | Too many requests. Slow the request rate and retry. |
500 | Server error. Retry, and report it if it persists. |