£850
−66%vs Sept 2024Active15128672Private limited companyLondon
SUBSTRONAUT LTD
From public filings as at 31 Aug 2026; may contain errors or be out of date. Verify at Companies House · Terms
01
Summary
SUBSTRONAUT LTD is an active private limited company (company number 15128672) incorporated on 10 September 2023, registered in London. Its registered activity is business and domestic software development (SIC 62012). Latest micro accounts cover the period ending 30 September 2025, showing net assets of £850, with 1 employee on average. As micro-entity accounts, no profit and loss account is filed, so turnover and profit are not public. Net assets fell 66% on the prior period (£2,485).
Peer position · net assets
By net assets it sits in the upper half of 15,170 comparable companies in London (median £702, upper quartile £27k).
02
Key dates
- Incorporated
- 10 September 20233 yrs ago
- Next accounts due
- 30 June 2027in 251 days
- Confirmation statement due
- 24 September 2027in 337 days
Due dates are expected from Companies House filing rules; confirm on the official register before relying on them.
03
Activity
- SIC 62012
- Business and domestic software development
- Accounts type
- Micro Entity
- Size band
- MicroCompanies Act thresholds
04
Financials
Not reported
Not disclosed
1
No changevs Sept 2024| Period end | Net assets | Cash | Debtors | Creditors <1y | Turnover | Profit | Employees |
|---|---|---|---|---|---|---|---|
| 30 September 2025 | £850 | — | — | £162 | — | — | 1 |
| 30 September 2024 | £2,485 | — | — | £172 | — | — | 1 |
Current ratio6.19Current assets ÷ creditors within one year
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.
05
Filing and accounts signals
- Net assets above zeroNet assets £850 at 30 September 2025
- Net assets down 25% or more on the prior period-65.8% vs prior period
- Current assets at least 1.5× creditors within one yearCurrent ratio 6.19
- Incorporated two to five years agoIncorporated 10 September 2023
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 They are not a rating, a prediction or advice, and may be incomplete or out of date.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.
06
Ownership and control
- Mr Thomas Dallimore
- 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
- Confirmation statement duein 337 days
- Next accounts duein 251 days
- Accounts period endNet assets £850 · micro accounts
- Accounts period endNet assets £2,485 · micro accounts
- Incorporated
08
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All companies incorporated on 10 September 2023 · in Sept 2023.
09
Reminders for SUBSTRONAUT LTD
Get an email before each filing deadline — accounts and confirmation statement — so nothing is late.