OSLER DIAGNOSTICS LIMITED
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Next accounts due
2026-09-30 (in 4mo)
Last filed for 2024-12-31
Confirmation statement due
2027-02-24 (in 9mo)
Last made up 2026-02-10
Watchouts
Cash
£28M
-45.4% vs 2023
Net assets
£37M
-38.1% vs 2023
Employees
153
+17.7% highest in 4 filed years
Profit before tax
-£33M
-24% lowest in 4 filed years
Watchouts
Facts from the Companies House register and the latest accounts — not a rating
-
Material uncertainty over going concern
Whilst the Company believes that further funds would be available before early 2026, there can be no assurance that the Company will be able to generate funds on terms acceptable to the Company, in a timely basis, or at all, which would impact the Company's ability to continue as a going concern. The failure of the Company to obtain sufficient funds on acceptable terms when needed would have a material adverse effect on the Company's business, results of operations and financial condition. As such, these circumstances represent a material uncertainty which may cast and raise significant doubt on the Company's ability to continue as a going concern. These financial statements do not contain any adjustments that might be required if the Company was unable to continue as a going concern.
-
1 PSC ceased in last 24 months
Significant control changed hands — see the Ownership section.
Net assets
6-year trend · vs Health Care median
Accounts
6-year trend · latest reflected 2024-12-31
| Metric | Trend | 2019-01-01 | 2019-12-31 | 2020-01-01 | 2020-12-31 | 2023-12-31 | 2024-12-31 |
|---|---|---|---|---|---|---|---|
| Turnover | — | — | — | — | — | — | |
| Operating profit | — | -£12,482,000 | — | -£21,412,000 | -£28,370,000 | -£34,400,000 | |
| Profit before tax | — | -£12,392,000 | — | -£21,369,000 | -£26,441,000 | -£32,782,000 | |
| Net profit | — | -£10,409,000 | — | -£17,295,000 | -£21,547,000 | -£27,082,000 | |
| Cash | — | £9,462,000 | — | £30,962,000 | £51,233,000 | £27,993,000 | |
| Total assets less current liabilities | — | £21,903,000 | — | £40,325,000 | £61,453,000 | £38,572,000 | |
| Net assets | — | £21,355,000 | — | £39,714,000 | £60,485,000 | £37,466,000 | |
| Equity | £980,000 | £21,355,000 | — | £39,714,000 | £60,485,000 | £37,466,000 | |
| Average employees | — | 44 | — | 76 | 130 | 153 | |
| Wages | — | — | — | — | £9,313,000 | £11,441,000 | |
| Directors' remuneration | — | — | — | — | £642,000 | £664,000 |
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
Year-on-year
FY2023 → FY2024 · period ending 2024-12-31 vs 2023-12-31
-
Turnover
—
Not reported
-
Cash
-45.4%
£51,233,000 £27,993,000
-
Net assets
-38.1%
£60,485,000 £37,466,000
-
Employees
+17.7%
130 153
highest in 4 filed years
-
Operating profit
-21.3%
-£28,370,000 -£34,400,000
lowest in 4 filed years
-
Profit before tax
-24%
-£26,441,000 -£32,782,000
lowest in 4 filed years
-
Wages
+22.8%
£9,313,000 £11,441,000
Each % is (latest − prior) ÷ |prior| for the line item as filed. The comparison is only shown when the latest and prior accounts cover broadly equal-length periods — short or long stubs (typical around incorporation or a year-end change) are suppressed rather than misrepresented. Lines a company doesn't report are omitted. About these numbers
Ratios
Computed from the line items above — sparklines read oldest → newest
| Ratio | Trend | 2019-01-01 | 2019-12-31 | 2020-01-01 | 2020-12-31 | 2023-12-31 | 2024-12-31 |
|---|---|---|---|---|---|---|---|
| Return on capital employed | — | -57.0% | — | -53.1% | -46.2% | -89.2% | |
| Current ratio | — | — | — | — | 26.22x | 15.52x | |
| Interest cover | — | — | — | — | -9.96x | -26.88x |
Gearing is liabilities over total assets. Current ratio is current assets over creditors falling due within one year. Interest cover is operating profit over absolute finance costs. Sector-distribution context coming next.
Name history
Renamed 1 time since incorporation
- OSLER DIAGNOSTICS LIMITED 2017-09-05 → present
- OXFORD IMPEDANCE DIAGNOSTICS LIMITED 2016-02-11 → 2017-09-05
Audit & accounting basis
- Accounting basis
- FRS 102
- Reporting scope
- Standalone (parent only)
- Auditor
- PricewaterhouseCoopers LLP
- Audit opinion
- Unqualified (clean)
- Going concern
- Material uncertainty disclosed
“Whilst the Company believes that further funds would be available before early 2026, there can be no assurance that the Company will be able to generate funds on terms acceptable to the Company, in a timely basis, or at all, which would impact the Company's ability to continue as a going concern. The failure of the Company to obtain sufficient funds on acceptable terms when needed would have a material adverse effect on the Company's business, results of operations and financial condition. As such, these circumstances represent a material uncertainty which may cast and raise significant doubt on the Company's ability to continue as a going concern. These financial statements do not contain any adjustments that might be required if the Company was unable to continue as a going concern.”
Significant events
- “Following the completion of the Series C financing in November 2022, Osler has worked to finalise product development on the Osler Origin.”
- “During the course of 2025, and subsequently, Osler will continue to advance its Osler Origin product through planned regulatory activities, and towards market launch.”
- “The Company's Series C fundraise completed on 8 November 2022, with a tranche of the investment deferred until 9 February 2023.”
- “On 8 November 2022, 269,881 preference shares were issued at a price of £263.25 per share for overall consideration of £71.1m.”
- “On 9 February 2023, 16,867 preference shares were issued at a price of £263.25 per share for overall consideration of £4.4m.”
Auditor, going-concern and subsidiary information is drawn from the narrative of the latest annual accounts. About these numbers
People
9 active · 12 resigned
| Name | Role | Appointed | Born | Nationality |
|---|---|---|---|---|
| BERRY, David Arthur | Director | 2022-02-01 | Feb 1978 | American |
| CAMPBELL, Connor | Director | 2017-07-26 | Sep 1994 | British |
| CRAWFORD-BRUNT, Andre | Director | 2017-07-26 | Mar 1971 | South African |
| DIGGELMANN, Roland | Director | 2023-07-31 | Apr 1967 | Swiss |
| DIXON, Paul Michael | Director | 2019-03-04 | Jan 1981 | British |
| SALZMAN, Amber | Director | 2020-07-20 | Nov 1961 | American |
| SPERZEL III, John Joseph | Director | 2026-01-21 | May 1963 | American |
| WARME, Louise Anna | Director | 2024-12-17 | Feb 1983 | Swedish |
| WILKINSON, James Henry | Director | 2022-06-09 | Feb 1966 | British |
Show 12 resigned officers
| Name | Role | Appointed | Resigned |
|---|---|---|---|
| ANDERSON, Andrew Crawford | Director | 2016-06-21 | 2017-04-06 |
| DAVIS, Jason, Professor | Director | 2016-06-21 | 2020-01-25 |
| DEBATIN, Jorg | Director | 2021-04-29 | 2022-11-08 |
| GEORGE, Peter Lutz | Director | 2022-06-29 | 2022-11-08 |
| GEORGE, Peter Lutz | Director | 2020-01-31 | 2022-06-09 |
| MCCONVILLE, Nicola Jane | Director | 2016-02-11 | 2016-06-21 |
| MCLEAN, Andrew James, Dr | Director | 2016-06-21 | 2019-12-31 |
| OLSEN, Mark | Director | 2022-11-08 | 2024-12-17 |
| PARR, Adam Stephen De Voghelaere, Dr | Director | 2019-01-03 | 2020-07-20 |
| RAE, Iain Fenton | Director | 2016-06-21 | 2019-01-03 |
| REINHARDT, Erich Rolf, Professor Doctor | Director | 2018-10-01 | 2022-11-08 |
| SMITH, Christopher Michael | Director | 2022-02-15 | 2023-05-31 |
Ownership
Persons with significant control
| Name | Kind | Nature of control | Notified | Status |
|---|---|---|---|---|
| Oxford Science Enterprises Holdings II Limited | Corporate entity | Shares 25–50%, Voting 25–50% | 2025-03-31 | Active |
| Oxford Science Enterprises Plc | Corporate entity | Shares 25–50%, Voting 25–50% | 2016-04-06 | Ceased 2025-03-31 |
Filing timeline
Last 20 of 97 total filings
Material constitutional events — rename, articles re-file, resolution
- 2026-04-24 RESOLUTIONS Resolution
| Date | Type | Category | Description | |
|---|---|---|---|---|
| 2026-04-24 | RESOLUTIONS | resolution | Resolution | |
| 2026-02-12 | CS01 | confirmation-statement | Confirmation statement with updates | |
| 2026-01-31 | CH01 | officers | Change person director company with change date | |
| 2026-01-22 | AP01 | officers | Appoint person director company with name date | |
| 2025-09-19 | AA | accounts | Accounts with accounts type full | |
| 2025-06-05 | PSC02 | persons-with-significant-control | Notification of a person with significant control | |
| 2025-06-05 | PSC07 | persons-with-significant-control | Cessation of a person with significant control | |
| 2025-02-12 | CS01 | confirmation-statement | Confirmation statement with no updates | |
| 2024-12-18 | TM01 | officers | Termination director company with name termination date | |
| 2024-12-18 | AP01 | officers | Appoint person director company with name date | |
| 2024-05-23 | AA | accounts | Accounts with accounts type full | |
| 2024-02-12 | CS01 | confirmation-statement | Confirmation statement with no updates | |
| 2023-07-31 | AP01 | officers | Appoint person director company with name date | |
| 2023-06-14 | TM01 | officers | Termination director company with name termination date | |
| 2023-05-17 | AA | accounts | Accounts with accounts type full | |
| 2023-02-14 | CS01 | confirmation-statement | Confirmation statement with updates | |
| 2023-02-09 | SH01 | capital | Capital allotment shares | |
| 2022-11-08 | SH01 | capital | Capital allotment shares | |
| 2022-11-08 | TM01 | officers | Termination director company with name termination date | |
| 2022-11-08 | TM01 | officers | Termination director company with name termination date |
Public-record activity
Raw counts from Companies House — last 12–24 months
- Filings
- 7
- Capital events
- 0
- Officers appointed
- 1
- 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.