1.4M+
UK companies indexed
from Companies House
from Companies House
1.4M UK companies tracked · updated daily from Companies House
Private market data, rebuilt from their filings.
Sonde turns raw Companies House filings into clean cap tables, dilution timelines and ownership data, focused on the venture-funded companies you actually track. Diligence and monitoring start with structured data, not a folder of PDFs.
Every SH01 & CS01 parsed on the companies we cover
sondedata.com/company/—
Example data
Illustrative example. Companies, people and figures shown are fictional.
44.2M+
filings indexed
from the register
from the register
11.6M+
shareholder records mapped
from CS01 cap tables
from CS01 cap tables
Daily
new companies & filings
as they are filed
as they are filed
sonde/sɒnd/nounAn automated device designed to gather information in hard to reach places.
How it works / 01
Three steps from a name to an answer.
1 Search
Find a company or investor
Start with a company name or number, or an investor's name. Sonde resolves the nicknames, initials, typos and corporate entities that one name hides across the companies we track.
2 Parse
We read every filing we cover
Once we identify a company as relevant to our users, Sonde reads every SH01 and CS01 it files, extracting allotments, share classes and statements of capital into structured data.
3 Analyse
Cap table & dilution
Get a reconciled cap table and a full dilution timeline, then export the clean data to CSV.
What's in the box / 02
Every document we cover, parsed.
Every shareholder, tracked.
We do the unglamorous work: parsing PDFs, reconciling SH01s, normalising names. So you can do the interesting work.
Companies House · rawSH01
Scanned PDF · 4 pp
Sonde · structuredCap table · example
Ordinary · Kestrel Ventures LLP9.4%
Ordinary · Greenwich Capital Partners8.1%
Seed · Orrery Seed Fund LP3.2%
Ordinary · A. Whitfield4.1%
01 / 05
Cap tables, rebuilt
Every SH01 reconciled into a current cap table, with share classes, holdings and percentages. No reading PDFs line by line.
02 / 05
Dilution timeline
Every round, allotment and statement of capital on one timeline. See exactly when ownership shifted, and by how much.
03 / 05
Reads the scans, too
We use AI to parse paper and scanned filings, and give you the original document alongside, so you can always check a figure against the source yourself.
04 / 05
Live filings & tags
SH01s, CS01s and appointments streamed from Companies House as they're filed, with automatic tags: dormant, acquired, founder-held.
05 / 05
Beta
Investor search & portfolio
One name surfaces the nicknames, initials and corporate vehicles an investor hides behind across the companies we track, all merged into a single portfolio with combined positions and co-investors.
Provenance / 03
Every number traces
back to a filing.
Sourced, not scraped
Data comes straight from the Companies House REST and Streaming APIs and the official filing PDFs. Nothing guessed, nothing crowdsourced.
Digital and image, clearly marked
Digital filings are parsed by rule; scanned filings by AI vision and flagged as image-sourced, so you always know how a figure was read.
Auditable to the source
Open the exact SH01 or CS01 behind any line, so you can verify every figure against the original filing yourself.
Sonde reports what UK entities file with Companies House. For groups that raise through an overseas parent, totals reflect the UK filings only.
Statement of capital · last 3 filings
£0.0001 × 41.2MSH01 · 14 Mar 2024
Digital
£0.0001 × 38.9MSH01 · 02 Nov 2023
Digital
£0.0001 × 35.1MCS01 · 19 Jun 2023
Image
IMAGE
Read from a scanned filing by AI vision, then double-checked against the prior statement of capital.
Built for / 04
For the people who spend too much time reading pdf filings.
VC, angels & syndicates
Diligence a round, then watch it
Pull a current cap table, dilution to date and the shareholder list for any company we cover. Then keep monitoring its filings, and track your own positions across the portfolio.
Founders & their accountants
Check your own filings
Inspect your company's full filing history in one place, and let Sonde flag SH01 misfilings before they become a problem. We routinely catch allotment errors others miss.
Supplier due diligence
Know who you're relying on
Research a supplier's funding, ownership and shareholder structure before you depend on them. Straight from their filings, with a source behind every figure.
Advisers & corporate finance
A verifiable ownership picture
Get the shareholder structure of any covered company without reading a single PDF, and cite the filing behind every figure.
Pricing / 05
Start free. Upgrade when you need more.
No card required to start. Cancel any time.
Free
£0no card
Try it on real companies, no card.
Get started
3 company lookups total (one-off)
Full detail on those 3 — complete cap tables, dilution, filings & fundraising
Your 3 companies stay viewable forever
1 watchlist, up to 10 companies
Pro
£39/ month
For analysts, angels, founders and advisers doing real research.
Start free — upgrade any time
Unlimited searches
Full SH01 / CS01 filing parsing
Complete cap tables & dilution timelines
Portfolio tracking (beta), unlimited
CSV export
Need multiple seats? Team plans are coming. Talk to us →
£39 per month including VAT. No free trial — the Free plan lets you try Sonde on 3 companies first. Cancel any time; full refund if you cancel within 14 days of first subscribing.