ADVENT BIOSERVICES LTD
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Next accounts due
2026-09-30 (in 4mo)
Last filed for 2024-12-31
Confirmation statement due
2026-10-17 (in 5mo)
Last made up 2025-10-03
Watchouts
None on the register
Cash
£352K
-5% lowest in 4 filed years
Net assets
£3M
-88.1% lowest in 4 filed years
Employees
97
+32.9% highest in 4 filed years
Profit before tax
-£19M
-304.4% vs 2023
Net assets
6-year trend · vs Health Care median
Accounts
6-year trend · latest reflected 2024-12-31
| Metric | Trend | 2019-12-31 | 2020-12-31 | 2021-12-31 | 2022-12-31 | 2023-12-31 | 2024-12-31 |
|---|---|---|---|---|---|---|---|
| Turnover | — | — | — | — | — | — | |
| Operating profit | — | — | — | — | — | — | |
| Profit before tax | — | — | — | — | £9,531,423 | -£19,482,978 | |
| Net profit | — | — | — | — | £7,621,277 | -£20,375,998 | |
| Cash | £2,496,386 | £1,743,946 | — | — | £370,379 | £351,834 | |
| Total assets less current liabilities | £4,835,895 | £7,668,274 | — | — | £23,489,667 | £2,899,158 | |
| Net assets | — | £7,668,274 | — | — | £23,116,093 | £2,740,095 | |
| Equity | £4,835,895 | £7,668,274 | — | — | £23,116,093 | £2,740,095 | |
| Average employees | 11 | 21 | — | — | 73 | 97 | |
| Wages | — | — | — | — | £3,726,461 | £5,041,640 |
Values shown as filed in the company's annual accounts. — indicates the figure wasn't present under that line item in that period. About these numbers
Audit & accounting basis
- Accounting basis
- FRS 102
- Reporting scope
- Standalone (parent only)
- Auditor
- Mercer & Hole LLP
- Audit opinion
- Unqualified (clean)
- Going concern
- Affirmed
“At the time of approving these financial statements, the director has a reasonable expectation that the Company will have adequate resources to continue operating for the foreseeable future. During the year, the Company wrote off a considerable related party debtor balance which has led to the significant loss. Without this write off, the Company would have had a profit before tax. Thus the director continues to adopt the going concern basis in preparing the financial statements.”
Significant events
- “On the 27 August 2025 Advent Bioservices Limited entered into a transaction for the sale of 100% of the Company's share capital to Northwest Biotherapeutics Inc..”
Auditor, going-concern and subsidiary information is drawn from the narrative of the latest annual accounts. About these numbers
People
2 active · 0 resigned
| Name | Role | Appointed | Born | Nationality |
|---|---|---|---|---|
| PIRE, Philippe Thomas George | Secretary | 2022-05-16 | — | — |
| POWERS, Linda Fairing | Director | 2013-10-03 | Oct 1955 | American |
Ownership
Persons with significant control
| Name | Kind | Nature of control | Notified | Status |
|---|---|---|---|---|
| Toucan Holdings Llc | Corporate entity | Shares 75–100% | 2019-12-30 | Active |
| Ms Linda Fairing Powers | Individual | Appoints directors | 2016-04-06 | Active |
Filing timeline
Last 20 of 36 total filings
| Date | Type | Category | Description | |
|---|---|---|---|---|
| 2025-12-31 | AA | accounts | Accounts with accounts type full | |
| 2025-10-17 | CS01 | confirmation-statement | Confirmation statement with updates | |
| 2025-03-04 | AA | accounts | Accounts with accounts type full | |
| 2024-10-15 | CS01 | confirmation-statement | Confirmation statement with updates | |
| 2023-12-29 | AA | accounts | Accounts with accounts type total exemption full | |
| 2023-10-16 | CS01 | confirmation-statement | Confirmation statement with no updates | |
| 2022-10-11 | CS01 | confirmation-statement | Confirmation statement with updates | |
| 2022-09-29 | AA | accounts | Accounts with accounts type total exemption full | |
| 2022-05-26 | AP03 | officers | Appoint person secretary company with name date | |
| 2022-01-20 | AA | accounts | Accounts with accounts type total exemption full | |
| 2021-10-20 | CS01 | confirmation-statement | Confirmation statement with no updates | |
| 2021-02-24 | AD01 | address | Change registered office address company with date old address new address | |
| 2020-12-29 | AA | accounts | Accounts with accounts type total exemption full | |
| 2020-11-25 | CS01 | confirmation-statement | Confirmation statement with updates | |
| 2020-01-02 | PSC02 | persons-with-significant-control | Notification of a person with significant control | |
| 2019-11-20 | CS01 | confirmation-statement | Confirmation statement with no updates | |
| 2019-09-30 | AA | accounts | Accounts with accounts type total exemption full | |
| 2018-12-18 | AA | accounts | Accounts with accounts type total exemption full | |
| 2018-10-11 | CS01 | confirmation-statement | Confirmation statement with no updates | |
| 2018-01-02 | AD01 | address | Change registered office address company with date old address new address |
Public-record activity
Raw counts from Companies House — last 12–24 months
- Filings
- 2
- Capital events
- 0
- Officers appointed
- 0
- Officers resigned
- 0
last 12 months
last 24 months
last 12 months
last 12 months
Direct counts from the register. No score, no rating — see the Filing timeline for the underlying events.
Year-on-year
FY2023 → FY2024 · period ending 2024-12-31 vs 2023-12-31
-
Turnover
—
Not reported
-
Cash
-5%
£370,379 £351,834
lowest in 4 filed years
-
Net assets
-88.1%
£23,116,093 £2,740,095
lowest in 3 filed years
-
Employees
+32.9%
73 97
highest in 4 filed years
-
Profit before tax
-304.4%
£9,531,423 -£19,482,978
-
Wages
+35.3%
£3,726,461 £5,041,640
Each % is (latest − prior) ÷ |prior| for the line item as filed. Periods don't have to be exactly 12 months apart — a long or short period (typical around incorporation or year-end changes) will distort the comparison. Lines a company doesn't report are omitted. About these numbers