# SYNTHESIS THERAPIES LTD (12547860)

> SYNTHESIS THERAPIES LTD is an active private limited company (company number 12547860) incorporated on 6 April 2020, registered in London. Its registered activity is other human health activities (SIC 86900). Latest micro accounts cover the period ending 30 April 2025, showing net assets of £15, 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 78% on the prior period (£67).

- Status: Active
- Incorporated: 2020-04-06
- Registered office: London, NW5 1SD
- SIC 86900: Other human health activities
- Next accounts due: 2027-01-30
- Confirmation statement due: 2027-04-20
- Accounts type: MICRO ENTITY

By net assets it sits in the lower half of 8,029 comparable companies in London (median £1,318, upper quartile £16k).

## Accounts (as filed)

| Period end | Net assets | Cash | Debtors | Creditors <1y | Turnover | Profit | Employees |
|---|---|---|---|---|---|---|---|
| 2025-04-30 | £15 | — | — | £16k | — | — | 1 |
| 2024-04-30 | £67 | — | — | £16k | — | — | 1 |

current ratio 1; size band micro.

## Filing and accounts signals (facts, not a rating)

- Net assets above zero: Net assets £15 at 30 April 2025
- Net assets down 25% or more on the prior period: -77.6% vs prior period
- Incorporated five or more years ago: Incorporated 6 April 2020

How each signal is derived: https://firmoscan.com/methodology

## Persons with significant control

- Dr Siobhan Gail O'Leary — owns 75–100% of shares; holds 75–100% of voting rights; can appoint or remove directors, since 2020-04-06

---
Source: Companies House register snapshot 2026-08-31, Open Government Licence v3.0. Information may have changed since that date and is not advice or a credit reference; check the official record before relying on it. Official record: https://find-and-update.company-information.service.gov.uk/company/12547860
HTML: https://firmoscan.com/company/12547860-synthesis-therapies-ltd