DYNAUTICS LTD is an active private limited company (company number 03326051) incorporated on 28 February 1997. Its registered activity is other research and experimental development on natural sciences and engineering (SIC 72190). Latest small accounts cover the period ending 30 June 2025, showing net assets of £1.53m and cash of £894k, with 10 employees on average. Net assets rose 1% on the prior period (£1.52m).
By net assets it sits in the top quarter of 3,656 comparable companies in the UK (median £559, upper quartile £49k).
Key dates
- Incorporated
- 28 February 1997
- Next accounts due
- 30 March 2027 — in 159 days
- Confirmation statement due
- 14 March 2027 — in 143 days
Due dates are expected from Companies House filing rules; confirm on the official register before relying on them.
Activity
- SIC 72190
- Other research and experimental development on natural sciences and engineering
- Accounts type
- Total Exemption Full
- Size band
- Micro (Companies Act thresholds)
Financials — 3 periods on record, latest ending 30 June 2025
| Period end | Net assets | Cash | Debtors | Creditors <1y | Turnover | Profit | Employees |
|---|---|---|---|---|---|---|---|
| 30 June 2025 | £1.53m | £894k | £649k | £258k | — | £14k | 10 |
| 30 June 2024 | £1.52m | £1.12m | £448k | £285k | — | £552k | 9 |
| 30 June 2023 | — | — | — | — | — | — | — |
- Current ratio
- 6.47 — comfortable
- Cash per employee
- £89k
Figures as filed in iXBRL accounts at Companies House. "—" means the line was not reported in that filing.
Firmoscan score: 85/100 (grade A)
- +10 Positive net assets — Net assets £1,533,873 at 2025-06-30
- +8 Comfortable liquidity — Current ratio 6.47
- +4 Cash reserves — Cash £894,001
- +5 Multi-year filing history — 3 periods on record
- +8 Established — Incorporated 1997-02-28 (30 years)
A transparent, rules-based score from filed data only: every point lists its evidence. It is not a credit rating or advice.
Ownership and control
- Dr Henry Robinson — owns 25–50% of shares · since 6 April 2016
- Sonardyne Group Limited (corporate entity, England) — has significant influence or control · since 22 September 2017 · ceased 26 February 2024
Persons with significant control hold 25% or more of shares or voting rights. Smaller shareholdings are only listed in confirmation-statement documents.
Similar companies in Portsmouth
Same activity (other research and experimental development on natural sciences and engineering), closest in incorporation date.
- QUADRAMEDIA LIMITED — Fareham, inc. Apr 1997
- LIBRA DESIGN ASSOCIATES LIMITED — Ryde, inc. Jul 2002
- INDEPENDENT MARITIME ASSESSMENT ASSOCIATES LIMITED — Hill Head Fareham, inc. Jul 1991
- DEVELOPING TECHNOLOGIES — Chichester, inc. Dec 2002
- CYLENCHAR LIMITED — Bognor Regis, inc. Feb 2004
- RHEINMETALL ELECTRONICS UK LTD — Newport, inc. May 1989
All companies incorporated on 28 February 1997 · in Feb 1997.
Reminders for DYNAUTICS LTD
Get an email before each filing deadline — accounts and confirmation statement — so nothing is late.