Free for non-commercial use with attribution. Commercial use requires a licence — please indicate your intended use. Commercial requests are reviewed and followed up before approval.

UK Company Financials — Companies House, iXBRL-derived

A clean, normalised, provenance-tracked dataset of UK company financial statements — 3.73 million filings across 3.49 million companies (trailing 12 months), parsed from the Companies House bulk Accounts Data Product and normalised across the FRS 102 (full UK GAAP) and FRS 105 (micro-entity) taxonomies, then joined to company metadata. No personal data.

Why this matters: we benchmarked five frontier LLMs on reading UK accounts

Frontier models — proprietary and open-weight — read UK accounts uniformly well. The scarce, defensible asset isn't the model; it's clean, verified data. (Full benchmark + code: uk-accounts-llm-benchmark.)

Model	Clean data	Raw filings
Claude Opus 4.8	99.6%	97.3%
DeepSeek V4 Pro (open)	99.5%	96.7%
GPT-5.5	98.4%	97.9%
GLM 5.2 (open)	98.4%	95.8%
Gemini 2.5 Pro	98.1%	96.7%

The residual ~1–4% error is the wrong kind for finance (inventing £0 turnover, wrong-line grabs, sign slips) — which is why verified data with per-figure provenance has standalone value.

What's in it

One row per company's most recent accounts in the period. Fields include:

Core: turnover, gross profit, total assets, total liabilities, net assets, employees.
Detail: operating profit, interest, PBT, tax, dividends, staff costs, cash, net debt, and a funding structure by maturity (bank loans, finance leases, intercompany, trade creditors…).
Meta & provenance: taxonomy, accounts type, filleted/audited/dormant flags, and a provenance tag on every derived figure (reported / summed / derived, with the formula).
Company metadata: SIC code, company type, status, incorporation date, coarse region.

Coverage (a feature, not just a caveat)

Net assets ~99%, total liabilities ~81%, total assets ~73–80%, employees ~85%, cash/net debt ~41% — and turnover only ~2%, because most UK companies file filleted or micro-entity accounts that legally omit the profit-and-loss. This disclosure map is itself a product.

Known limitations and derivations are documented in the pipeline repo (DATA_QUALITY_NOTES).

Privacy (GDPR)

No director/PSC names, dates of birth, nationalities, or address lines. Only tagged numeric and identifier facts are extracted; geography is kept as outward postcode + post town only.

Licence & attribution

Derived from Companies House data under the Open Government Licence v3.0:

Contains public sector information licensed under the Open Government Licence v3.0.

Access terms: free for non-commercial use with attribution. Commercial use requires a licence — training-data licences, refreshed subscription feeds, and bespoke cuts are available. Contact via danielcheah.com or LinkedIn.

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