The data that answers it

Ranked by fit · best first
Global Legal Entity Identifier Founda… Strong fit
GLEIF API

LEI Level 2 data reports direct and ultimate accounting-consolidating parent relationships, status/periods, updates, corroboration, and exceptions.

Free API Global 29 fields
Global Legal Entity Identifier Founda… Strong fit
GLEIF Golden Copy and Delta Files

RR-CDF files supply direct and ultimate accounting-consolidating parent relationships with direction, periods/status, updates, validation, and exceptions.

Free Full file Global 28 fields
U.S. Securities and Exchange Commissi… Strong fit
Investment Adviser Public Disclosure and Form ADV Data

Form ADV affiliation schedules disclose named affiliates and control, controlled, or common-control basis pinned by FilingID; coverage is adviser-limited.

Free Full file National US 121 fields
OpenCorporates Strong fit
OpenCorporates Companies API

Authenticated company lookup can return a controlling entity derived from explicit parent/subsidiary data or majority equity stake with retrieval time.

Paid APIFull file Global 6 fields
Coresignal Supporting fit
Coresignal Multi-source Company API

Selected-company enrichment returns parent-company name and relationship-information date; this supports the parent slice, not exhaustive affiliation.

Paid APIBatch enrichment Global 3 fields
Experian Supporting fit
Experian Businesses API

The commercial arbitrary-business API corporate-linkage module returns a parent or headquarters entity with record-as-of context; it does not supply exhaustive subsidiaries or beneficial ownership.

Paid API National US 12 fields
U.S. Mine Safety and Health Administr… Supporting fit
MSHA Mines Data Set

The schema pairs CURRENT_CONTROLLER_ID and CURRENT_CONTROLLER_NAME with CURRENT_OPERATOR_ID and CURRENT_OPERATOR_NAME and defines the controller as a legal entity acting as controller of the operator; CURRENT_CONTROLLER_BEGIN_DT records the associated operating-period start. This supports only a regulator-recorded controller-to-operator affiliation when both resolved parties are organisations. It does not establish parent/subsidiary status, equity, beneficial ownership, or an exhaustive affiliation graph. Preserve direction, both IDs and names, the operating-period date where present, current-record and retrieval dates, and exclude rows where the controller resolves to a natural person.

Free Full file National US 31 fields
People Data Labs Supporting fit
People Data Labs Company Enrichment API

For a buyer-selected company, the commercial schema provides profile-derived affiliated company IDs and premium immediate- and ultimate-parent IDs; the documentation defines immediate parent as direct ownership and ultimate parent as the top controlling entity. This supports a current profile-derived parent/affiliate slice only, not registry proof, beneficial ownership, or relationship history.

Paid APIFull file Global 1 field

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