−£352
−8900%vs Nov 2024Active13714774Private limited companyHarpenden
ULTROX LIMITED
Significant control: Michael James Von Bertele (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From public filings as at 31 Aug 2026; may contain errors or be out of date.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 Ultrox Limited sell?
Registered activity: Research and experimental development on biotechnology (SIC 72110). We’re building product and service lists for UK companies. Get this one when it’s ready.
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01
Summary
ULTROX LIMITED is an active private limited company (company number 13714774) incorporated on 1 November 2021, registered in Harpenden. Its registered activity is research and experimental development on biotechnology (SIC 72110). Latest micro accounts cover the period ending 31 July 2025, showing net assets of −£352, 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 fell 8900% on the prior period (£4).
Peer position · net assets
By net assets it sits in the bottom quarter of 2,418 comparable companies in the UK (median £1,000, upper quartile £92k).
02
Ownership and control
- Mr Michael James Von Bertele
- holds 75–100% of voting rights
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
- 1 November 20214 yrs ago
- Next accounts due
- 30 April 2027in 189 days
- Confirmation statement due
- 15 November 2026in 23 days
Due dates are expected from Companies House filing rules; confirm on the official register before relying on them.
04
Activity
- SIC 72110
- Research and experimental development on biotechnology
- SIC 72200
- Research and experimental development on social sciences and humanities
- Accounts type
- Micro Entity
- Size band
- MicroCompanies Act thresholds
05
Financials
Not reported
Not disclosed
0
vs Nov 2024| Period end | Net assets | Cash | Debtors | Creditors <1y | Turnover | Profit | Employees |
|---|---|---|---|---|---|---|---|
| 31 July 2025 | −£352 | — | — | £302 | — | — | 0 |
| 30 November 2024 | £4 | — | — | £4 | — | — | 0 |
Current ratio0.33Current 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.
06
Filing and accounts signals
- Net assets below zeroNet assets £-352 at 31 July 2025
- Net assets down 25% or more on the prior period-8900.0% vs prior period
- Current assets below creditors within one yearCurrent ratio 0.33
- Incorporated two to five years agoIncorporated 1 November 2021
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 189 days
- Confirmation statement duein 23 days
- Accounts period endNet liabilities £352 · micro accounts
- Accounts period endNet assets £4 · micro accounts
- Incorporated
08
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All companies incorporated on 1 November 2021 · in Nov 2021.
09
Reminders for ULTROX LIMITED
Get an email before each filing deadline — accounts and confirmation statement — so nothing is late.