£15.70m
−39%vs May 2024Active00745839Private limited companyLoughton
DIOMED DEVELOPMENTS LIMITED
B77/10001
Summary
DIOMED DEVELOPMENTS LIMITED is an active private limited company (company number 00745839) incorporated on 2 January 1963, registered in Loughton. Its registered activity is manufacture of basic pharmaceutical products (SIC 21100). Latest full accounts cover the period ending 31 May 2025, showing net assets of £15.70m and cash of £16.20m, with 6 employees on average. Turnover was £21.20m and profit for the year £2.82m. Net assets fell 39% on the prior period (£25.79m).
Peer position · net assets
By net assets it sits in the top quarter of 86 comparable companies in Greater London (median £100, upper quartile £35k).
02
Key dates
- Incorporated
- 2 January 196363 yrs ago
- Next accounts due
- 28 February 2027in 129 days
- Confirmation statement due
- 16 January 2027in 86 days
Due dates are expected from Companies House filing rules; confirm on the official register before relying on them.
03
Activity
- SIC 21100
- Manufacture of basic pharmaceutical products
- Accounts type
- Full
- Size band
- MediumCompanies Act thresholds
04
Financials
£16.20m
+6%vs May 2024£21.20m
+6%vs May 20246
No changevs May 2024| Period end | Net assets | Cash | Debtors | Creditors <1y | Turnover | Profit | Employees |
|---|---|---|---|---|---|---|---|
| 31 May 2025 | £15.70m | £16.20m | — | £9.54m | £21.20m | £2.82m | 6 |
| 31 May 2024 | £25.79m | £15.25m | — | £8.12m | £20.06m | £1.04m | 6 |
| 1 June 2023 | — | — | — | — | — | — | — |
Current ratio2.62Comfortable
Net margin13.3%Profit for the year ÷ turnover
Cash per employee£2.70mCash ÷ average employees
Figures as filed in iXBRL accounts at Companies House. "—" means the line was not reported in that filing.
05
Firmoscan score
77 / 100 · grade B
| 50 | Starting scoreEvery scored company starts here |
| +10 | Positive net assetsNet assets £15,698,305 at 2025-05-31 |
| −8 | Net assets falling-39.1% vs prior period |
| +8 | Comfortable liquidityCurrent ratio 2.62 |
| +4 | Cash reservesCash £16,202,622 |
| +5 | Multi-year filing history3 periods on record |
| +8 | EstablishedIncorporated 1963-01-02 (64 years) |
| 77 | Score, grade B |
A transparent, rules-based score from filed data only: every point lists its evidence. It is not a credit rating or advice. How the score is computed.
06
Ownership and control
- Diomed Group Holdings Limited
- owns 75–100% of shares
- holds 75–100% of voting rights
- can appoint or remove directors
- Mr Michael Jonathan Yarrow
- owns 75–100% of shares
- holds 75–100% of voting rights
- Diomed Group Holdings Limited
- owns 75–100% of shares
- holds 75–100% of voting rights
- can appoint or remove directors
- June24 Holdings Limited
- 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.
07
Timeline
- Next accounts duein 129 days
- Confirmation statement duein 86 days
- Accounts period endNet assets £15.70m · full accounts
- Accounts period endNet assets £25.79m · full accounts
- Accounts period end
- Incorporated
08
Similar companies in Greater London
- MACARTHYS LABORATORIES LIMITEDRomford · inc. Jan 1959
- COLORCON LIMITEDDartford Kent · inc. Jan 1971
- E.R.SQUIBB & SONS LIMITEDDenham · inc. Aug 1949
- PHARMVIT LIMITEDMiddlesex · inc. Oct 1979
- GENERICS (U.K.) LIMITEDHertfordshire · inc. Apr 1981
- CHEMIDEX PHARMA LIMITEDEgham · inc. Nov 1982
All companies incorporated on 2 January 1963 · in Jan 1963.
09
Reminders for DIOMED DEVELOPMENTS LIMITED
Get an email before each filing deadline — accounts and confirmation statement — so nothing is late.