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GB · Companies House · Ownership structure
ONYX HEALTH LTD
Company number 04977031 · Private Limited Company · Active. Its ownership runs 1 layer up, from its confirmation statements at Companies House.
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Ownership chart
ONYX HEALTH LTD's ownership structure
Owners above, the companies it holds below, from confirmation statements filed at Companies House.
Company report
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The free view masks some of the names and stakes in ONYX HEALTH LTD's structure. The company report shows every shareholder and holding with stakes, layer by layer, the directors and their other companies, accounts, charges and insolvency history, and multiple layers of shareholders and directors found in 23 European countries. Ready in 24 hours, or 2 days for the global check, sent to your email.
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Register details
Company facts
- Company number
- 04977031
- Status
- Active
- Company type
- Private Limited Company
- Incorporated
- 26 November 2003
- Registered office
- Newcastle Upon Tyne, Tyne & Wear
- Country of origin
- United Kingdom
- Business
- Other business support service activities n.e.c.
- Latest accounts type
- Total Exemption Full
- Shareholder layers
- 1
Company details from the Companies House register of 1 September 2026.
At a glance
ONYX HEALTH LTD's ownership
- Its latest confirmation statement with a shareholder list (20 November 2025) lists 2 shareholders: 2 other shareholders, such as people.
From confirmation statements filed at Companies House up to 19 June 2026. Shareholdings can change at any time: check the current position live before relying on it.
Shareholders · 1 layer
Who owns ONYX HEALTH LTD
ONYX HEALTH LTD's shareholders as listed in its latest confirmation statement, then the shareholders of each shareholder that is a UK company, layer by layer.
Every shareholder, layer by layer (2)
Layer 1
Shareholders of ONYX HEALTH LTD · statement of 20 November 2025
| Shareholder | Stake | Shares | Class |
|---|---|---|---|
| KAREN LISA WINTERHALTER | 65% | 130 | A ORDINARY / PREFERENCE |
| Masked · in the company report | — | — | — |
People with significant control · 2 current
Who controls ONYX HEALTH LTD
ONYX HEALTH LTD's people with significant control as registered at Companies House on 12 November 2026: 2 current and 0 former. They are the people and companies that hold more than 25% of its shares or voting rights, or otherwise control it.
Current (2)
| Name | Nature of control | Notified | Details |
|---|---|---|---|
| Ms Karen Lisa Winterhalter | Shares: more than 50% but less than 75% Voting rights: more than 50% but less than 75% | 6 April 2016 | Person · British · resident in England |
| Masked · in the company report | — | — | — |
Officers · 1 current
Who runs ONYX HEALTH LTD
ONYX HEALTH LTD's directors and secretaries as registered at Companies House on 12 November 2026: 1 current and 7 former.
Current officers (1)
| Name | Role | Appointed | Nationality | Country of residence |
|---|---|---|---|---|
| WINTERHALTER, Karen Lisa | Director | 26 November 2003 | British | England |
Former officers (7)
| Name | Role | Appointed | Resigned |
|---|---|---|---|
| GILL, Stephen Michael | Secretary | 26 November 2003 | 31 December 2004 |
| WARREN, John Edward | Secretary | 28 November 2006 | 25 November 2013 |
| WRIGHT, Penelope Jane | Secretary | 1 January 2005 | 26 November 2006 |
| CHANCERY SECRETARIES LIMITED | Corporate nominee secretary | 26 November 2003 | 26 November 2003 |
| PILL, Trevor Graham | Director | 26 November 2021 | 28 February 2025 |
| WRIGHT, Penelope Jane | Director | 1 January 2005 | 26 November 2006 |
| CHANCERY DIRECTORS LIMITED | Corporate nominee director | 26 November 2003 | 26 November 2003 |
Explained
How this chart is built
Every UK company files a confirmation statement with Companies House at least once a year, and private companies list their shareholders in it. The chart takes each company's latest statement with a shareholder list and follows every shareholder that is itself a UK company to that company's own statement, layer by layer. Holdings work the other way: every company whose latest statement lists the company as a shareholder, then the companies those hold.
A stake is the share of the company's issued shares, weighted by nominal value where the statement gives it. Each statement shows the position on its own date. Shareholders are matched to UK companies by their registered names, so a holder can occasionally be matched to the wrong company or not matched at all.
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