BIOSIRIUS LTD
Company number 13582504 · Active · Poole BH14 0HU
BIOSIRIUS LTD is an active private limited company (company number 13582504) incorporated on 24 August 2021, registered in Poole. Its registered activity is manufacture of pharmaceutical preparations (SIC 21200). Latest micro accounts cover the period ending 31 August 2025, showing net assets of £61k, 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 2% on the prior period (£62k).
By net assets it sits in the upper half of 307 comparable companies in the UK (median £1,000, upper quartile £146k).
Key dates
- Incorporated
- 24 August 2021
- Next accounts due
- 31 May 2027 — in 221 days
- Confirmation statement due
- 7 September 2027 — in 320 days
Due dates are expected from Companies House filing rules; confirm on the official register before relying on them.
Activity
- SIC 21200
- Manufacture of pharmaceutical preparations
- SIC 72110
- Research and experimental development on biotechnology
- 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 | £61k | — | — | £40k | — | — | 1 |
| 31 August 2024 | £62k | — | — | £34k | — | — | 1 |
- Current ratio
- 0.21 — current liabilities exceed current assets
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: 60/100 (grade C)
- +10 Positive net assets — Net assets £60,973 at 2025-08-31
- -8 Current liabilities exceed current assets — Current ratio 0.21
- +8 Established — Incorporated 2021-08-24 (5 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 Syed Muhammad Tahir Nasser — owns 50–75% of shares; holds 50–75% of voting rights; can appoint or remove directors · since 24 August 2021
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 the UK
Same activity (manufacture of pharmaceutical preparations), closest in incorporation date.
- CEUTICA LIMITED — Swindon, inc. Jul 2021
- COVGUARD LIMITED — Cheltenham, inc. Jun 2021
- CF PHARMA UK LTD — Peterborough, inc. Oct 2021
- NEURONE LIMITED — Calne, inc. Jun 2021
- PSI PHARMACEUTICALS LTD — Calne, inc. Dec 2021
- BARBARA MAWER ENTERPRISES LIMITED — Penzance, inc. Apr 2021
All companies incorporated on 24 August 2021 · in Aug 2021.
Reminders for BIOSIRIUS LTD
Get an email before each filing deadline — accounts and confirmation statement — so nothing is late.