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who-really-owns-it

Research companies, directors, shareholders and ultimate beneficial ownership in official corporate registries, filings and offshore datasets — OpenCorporates, UK Companies House and the PSC register, SEC EDGAR, US Secretary of State registries, EU business registers, GLEIF LEI records, OpenOwnership, OpenSanctions and the ICIJ Offshore Leaks database. Use when asked who owns or controls a company, to find a person's other directorships, or to unpick a group structure. Applies to KYB and UBO ver

14stars1forksUpdated 8/16/2026

Security Assessment

Safe(91/100)
Security Score91/100

About who-really-owns-it

Who Really Owns It is an OSINT workflow for researching companies, directors, shareholders, and ultimate beneficial ownership using official corporate registries, filings, and offshore datasets. It names concrete authoritative sources including OpenCorporates, UK Companies House and the PSC register, SEC EDGAR, US Secretary of State registries, EU business registers, GLEIF LEI records, OpenOwnership, OpenSanctions, and the ICIJ Offshore Leaks database. Its central insight is that registry disclosure varies enormously by jurisdiction, so the real strategy is working out what a given jurisdiction lets you see and planning around the gap, and always searching by the durable company number rather than the mutable name.

The method is a structured, read-only research process: resolve the canonical entity, pull the full filing history as a timeline rather than the summary page, read the officer, ownership, and charges records, run officer and address pivots to turn a single entity into a network, screen entity and people against OpenSanctions as review items, and graph multi-entity results. A companion filing-interpretation reference explains how to read formation documents, annual returns and accounts, officer changes, share transfers, charges, and beneficial-ownership declarations, with calibration guidance so an analyst does not, for example, misread the legal norm of absent revenue disclosure in a small company as evasion.

Because it works exclusively with official and public registry sources for defensive due-diligence purposes, it is a benign, read-only research skill. It targets KYB and UBO verification, AML and sanctions screening, nominee and shell-company detection, procurement integrity, and M&A diligence.

FAQ

What sources does it use?

Official and public corporate data: OpenCorporates, UK Companies House and the PSC register, SEC EDGAR, US Secretary of State registries, EU business registers, GLEIF LEI records, OpenOwnership, OpenSanctions, and the ICIJ Offshore Leaks database.

Why search by company number instead of name?

The company number is issued once and persists through renames, mergers, and dissolution, while the name changes, so the number gives durable, unambiguous lookups without name-matching problems.

What is the officer pivot?

Taking each officer's exact registry-normalized name and searching the officer index for their other appointments, which turns a single entity into a network and is described as the highest-value pivot in the skill.

Does it interpret financial filings responsibly?

Yes. Its filing-interpretation reference calibrates readings to the filing regime, warning for example that absence of revenue disclosure in a small private company is the legal norm rather than evasion, and that misreporting it undermines credibility.

Is any of this intrusive or non-public?

No. It works entirely with official registries, public filings, and published offshore-leak datasets for due-diligence and screening purposes.

All Files

3 files
reference/filing-interpretation.md9.4 KB
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reference/registry-catalogue.md11.1 KB
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SKILL.md14.4 KB
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Install who-really-owns-it

Download and extract the skill files to your .claude/skills/ directory.

Quick Setup:

  1. Copy the skill folder to .claude/skills/
  2. Claude will automatically detect and use the skill