CALSON LTD
Company number SC383834 · Active · Rosewell EH24 9EJ
CALSON LTD is an active private limited company (company number SC383834) incorporated on 17 August 2010, registered in Rosewell. Its registered activity is engineering related scientific and technical consulting activities (SIC 71122). Latest micro accounts cover the period ending 31 August 2025, showing net assets of £100, with 0 employees on average. As micro-entity accounts, no profit and loss account is filed, so turnover and profit are not public. Net assets were unchanged on the prior period.
By net assets it sits in the lower half of 240 comparable companies in Edinburgh (median £5,962, upper quartile £47k).
Key dates
- Incorporated
- 17 August 2010
- Next accounts due
- 31 May 2027 — in 225 days
- Confirmation statement due
- 31 August 2027 — in 317 days
Due dates are expected from Companies House filing rules; confirm on the official register before relying on them.
Activity
- SIC 71122
- Engineering related scientific and technical consulting activities
- SIC 72190
- Other research and experimental development on natural sciences and engineering
- SIC 99999
- Dormant Company
- Accounts type
- Micro Entity
- Size band
- Micro (Companies Act thresholds)
Financials — 2 periods on record, latest ending 31 August 2025
| Period end | Net assets | Cash | Debtors | Creditors <1y | Turnover | Profit | Employees |
|---|---|---|---|---|---|---|---|
| 31 August 2025 | £100 | — | — | £0 | — | — | 0 |
| 31 August 2024 | £100 | — | — | £0 | — | — | 0 |
Figures as filed in iXBRL accounts at Companies House. "—" means the line was not reported in that filing; micro-entity accounts contain no profit and loss account.
Firmoscan score: 68/100 (grade B)
- +10 Positive net assets — Net assets £100 at 2025-08-31
- +8 Established — Incorporated 2010-08-17 (16 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 Callum Ross Wilson — owns 75–100% of shares; holds 75–100% of voting rights · since 6 April 2016
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 Edinburgh
Same activity (engineering related scientific and technical consulting activities), closest in incorporation date.
- GREEN CAT RENEWABLE DEVELOPMENTS LIMITED — Roslin, inc. Sept 2010
- XI ENGINEERING CONSULTANTS LTD — Leith, inc. Oct 2010
- ARDMORE ENERGY LIMITED — Edinburgh, inc. Apr 2010
- WILDCAT GEOSCIENCE LIMITED — North Berwick, inc. Apr 2010
- D7 ENGINEERING LIMITED — East Linton, inc. Feb 2010
- GA MORRIS & ASSOCIATES LTD. — Edinburgh, inc. Nov 2009
Reminders for CALSON LTD
Get an email before each filing deadline — accounts and confirmation statement — so nothing is late.