£1,000
No changevs Mar 2025Active13909688Private limited companyLondon
CONTRAST DIAGNOSTICS SIGMA LTD
Significant control: Andrew John Unwin (75–100%)
From public filings as at 31 Aug 2026; may contain errors or be out of date. Verify at Companies House · Terms
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What does Contrast Diagnostics Sigma Ltd sell?
Registered activity: Specialists medical practice activities (SIC 86220). We’re building product and service lists for UK companies. Get this one when it’s ready.
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01
Summary
CONTRAST DIAGNOSTICS SIGMA LTD is an active private limited company (company number 13909688) incorporated on 11 February 2022, registered in London. Its registered activity is specialists medical practice activities (SIC 86220). Latest dormant accounts cover the period ending 31 March 2026, showing net assets of £1,000, with 0 employees on average. Net assets were unchanged on the prior period.
Peer position · net assets
By net assets it sits in the lower half of 2,817 comparable companies in London (median £16k, upper quartile £103k).
02
Ownership and control
- Mr Andrew John Unwin
- owns 75–100% of shares
- holds 75–100% of voting rights
- can appoint or remove directors
Persons with significant control hold 25% or more of shares or voting rights. Smaller shareholdings are only listed in confirmation-statement documents. Directors and secretaries: see the officers list at Companies House.
03
Key dates
- Incorporated
- 11 February 20224 yrs ago
- Next accounts due
- 31 December 2027in 434 days
- Confirmation statement due
- 25 February 2027in 125 days
Due dates are expected from Companies House filing rules; confirm on the official register before relying on them.
04
Activity
- SIC 86220
- Specialists medical practice activities
- Accounts type
- Dormant
- Size band
- MicroCompanies Act thresholds
05
Financials
Not reported
Not reported
0
vs Mar 2025| Period end | Net assets | Cash | Debtors | Creditors <1y | Turnover | Profit | Employees |
|---|---|---|---|---|---|---|---|
| 31 March 2026 | £1,000 | — | £1,000 | — | — | — | 0 |
| 31 March 2025 | £1,000 | — | £1,000 | — | — | — | 0 |
Figures as filed in iXBRL accounts at Companies House. "—" means the line was not reported in that filing.
06
Filing and accounts signals
- Net assets above zeroNet assets £1,000 at 31 March 2026
- Incorporated two to five years agoIncorporated 11 February 2022
Neutral facts read from the register and filed accounts, each with its evidence. They are not a rating, a prediction or advice, and may be incomplete or out of date. How each signal is derived.
07
Timeline
- Next accounts duein 434 days
- Confirmation statement duein 125 days
- Accounts period endNet assets £1,000 · dormant accounts
- Accounts period endNet assets £1,000 · dormant accounts
- Incorporated
08
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- CONTRAST DIAGNOSTICS ALPHA LTDLondon · inc. Feb 2022
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All companies incorporated on 11 February 2022 · in Feb 2022.
09
Reminders for CONTRAST DIAGNOSTICS SIGMA LTD
Get an email before each filing deadline — accounts and confirmation statement — so nothing is late.