Identifying who controls a company, without naming a natural person

This is the topic where the honest answer depends entirely on the country, and where many services keep things vague. In Europe, public beneficial-ownership registers were closed by the Court of Justice of the European Union in 2022, and on 3 September 2026 (C-798/24) the Court ruled that even shareholder data published online without any access condition breaches the GDPR. Since 19 September 2026 Sirenic therefore names no natural person holding or controlling a company: legal entities are named, natural persons are counted. What remains available varies from state to state, and must be stated state by state.

See a real response (free) Get the quote for /v1/eu/entreprise/GB/{company_number}/beneficiaires-effectifs

Country by country, without rounding

For France, Sirenic exposes no beneficial-ownership register: it has not been publicly accessible since the 2022 ruling of the Court of Justice of the European Union. What we serve is ownership as it appears in publicly filed deeds (articles of association), with a confidence level and the source document reference. That is not a beneficial-ownership register and does not replace one.

The French route: filed deeds, with their limits

/v1/entreprise/{siren}/capital reads the latest publicly filed deed and extracts share capital, legal form, shareholders — corporate holders named with role and percentage, natural persons counted with their percentage (associes_personnes_physiques, detenu_par_personnes_physiques_pct) — and notable clauses, with a confidence level and the source document reference.

A proof guard frames that extraction: a clause is served only if its keyword actually appears in the document's text. That guard is not theoretical — it was added after a non-existent pre-emption clause was produced for a real company.

Filed articles can be old and reflect only what was published: an unpublished share transfer does not appear. The document is immutable, so it is extracted once and cached. Read it as a dated exhibit, never as the current shareholding.

How we handle individuals

• No natural person owning or controlling a company has been named since 19 September 2026: they are counted, and the response says so.
• For officers, made public by company law: never a full date of birth, year only, or month and year where the source publishes them.
• Never a home address, never a national identity number.
• When in doubt between an individual and a legal entity: we omit. Resolving that doubt at random publishes personal data by mistake.

How you pay

Every route is paid per call, in USDC or EURC on the Base network, over the x402 protocol: no account to create, no API key, no subscription. The first call returns a 402 quote your client settles, then replays the call. A failed call is never billed.

Would you rather have a euro invoice and prepaid credits? That is in preparation, and we will not announce a date until it is open. Write to contact@sirenic.eu and we will let you know when it opens.

Paid responses are Ed25519-signed: you can later prove what was served to you, and when. The whole catalogue is free to read in the OpenAPI document and in llms.txt.

One call, end to end

# Client x402 (npm) — le devis 402 est réglé et l'appel rejoué automatiquement
npx x402-fetch https://api.sirenic.eu/v1/entreprise/552032534

# Ou en MCP, dans Claude Code / Cursor
claude mcp add --transport http sirenic https://api.sirenic.eu/mcp

Routes used and pricing

The ownership data served for France is not a beneficial-ownership register and does not replace one: the French register has not been publicly accessible since the 2022 ruling of the Court of Justice of the European Union. What is served comes from publicly filed deeds.

Frequently asked questions

Why not expose a French register like others do?

Because it is no longer public. Serving it would require an authorisation we do not hold, or a source of doubtful legality. We prefer a stated absence to a field filled without a basis.

Are ceased UK controllers included?

Not by default. Add inclure_cesses=true to get ceased legal entities, with their cessation date — useful to reconstruct a past ownership chain. Ceased natural persons are counted, like active ones.

Take it further

No account to create, no key to request: the first step is free and shows you exactly what you would be buying.

See a real response (free) Get the quote for /v1/eu/entreprise/GB/{company_number}/beneficiaires-effectifs Read the route reference Get notified about euro packs

Read next

• Automating business verification (KYB)
• Querying European company registers

Volume figures on this page were measured in our database on 2026-08-19. They are dated snapshots, not live counters. · OpenAPI · llms.txt · Full route catalogue and pricing