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ASTRONAUTX LIMITED

Company number 11919384 · Private Limited Company · Active. Its ownership runs 1 layer up, from its confirmation statements at Companies House.

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Ownership chart

ASTRONAUTX LIMITED's ownership structure

Owners above, the companies it holds below, from confirmation statements filed at Companies House.

OWNERS · 2OWNERS · 1COMPANYASTRONAUTX LIMITEDASTRONAUTX LIMITEDCompany 1191938431 SHAREHOLDERSMPM BIOVENTURES 2022, LPMPM BIOVENTURES 202…10,000,000 sharesNOVARTIS BIOVENTURES LTDNOVARTIS BIOVENTURE…10,000,000 sharesDEMENTIA DISCOVERY GP LP ACTING AS GENERAL PARTNER OF DEMENTIA DISCOVERY LPDEMENTIA DISCOVERY G…9,882,624 sharesLSP DEMENTIA FUND COOPERATIEVE U.A.LSP DEMENTIA FUND CO…9,500,000 sharesUK FF NOMINEES LIMITEDUK FF NOMINEES LIMITED4,469,342 sharesand 25 more · full listThe company report: the owners of these companies and the levels above, where possible.Owners of these companiesand above levels, where possibleIn the company report ›
ASTRONAUTX LIMITEDCompany with its own page hereOther UK companyPerson or holder without a UK company numberMasked: in the company reportOwners and above levels: in the company report60%Stake

Company report

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The free view masks some of the names and stakes in ASTRONAUTX LIMITED'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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Company facts

Company number
11919384
Status
Active
Company type
Private Limited Company
Incorporated
1 April 2019
Registered office
Altrincham, Cheshire
Country of origin
United Kingdom
Business
Research and experimental development on biotechnology
Latest accounts type
Group
Shareholder layers
1

Company details from the Companies House register of 1 September 2026.

At a glance

ASTRONAUTX LIMITED's ownership

  • Its latest confirmation statement with a shareholder list (31 March 2026) lists 31 shareholders: 3 companies and 28 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 ASTRONAUTX LIMITED

ASTRONAUTX LIMITED'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 (31)

Layer 1

Shareholders of ASTRONAUTX LIMITED · statement of 31 March 2026

ShareholderStakeSharesClass
MPM BIOVENTURES 2022, LP—10,000,000SERIES A-2 PREFERRED
NOVARTIS BIOVENTURES LTD—10,000,000SERIES A-2 PREFERRED
DEMENTIA DISCOVERY GP LP ACTING AS GENERAL PARTNER OF DEMENTIA DISCOVERY LP—9,882,624ORDINARY / SERIES A-1 PREFERRED / SERIES A-2 PREFERRED / SERIES SEED PREFERRED
LSP DEMENTIA FUND COOPERATIEVE U.A.—9,500,000SERIES A-2 PREFERRED
Masked · in the company report———
UK FF NOMINEES LIMITED
Company 12591650		—4,469,342SERIES A-1 PREFERRED / SERIES A-2 PREFERRED
BB6 SERVICE (HP) TRUSCO PTY LTD AS TRUSTEE OF THE BB6 (HP) TRUST—3,337,284SERIES A-2 PREFERRED
BB6 SERVICE (H) TRUSCO PTY LTD AS TRUSTEE OF THE BB6 (H) TRUST—2,047,414SERIES A-2 PREFERRED
BB6 SERVICE TRUSCO PTY LTD AS TRUSTEE OF THE BB6 TRUST—1,740,302SERIES A-2 PREFERRED
UTF GENERAL PARTNER LLP
Company OC403211		—1,100,000SERIES A-1 PREFERRED / SERIES SEED PREFERRED
HOSTPLUS PTY LTD AS TRUSTEE FOR HOSTPLUS POOLED SUPERANNUATION TRUST—1,039,392SERIES A-2 PREFERRED
DDF PARALLEL LLP
Company OC416321		—630,806ORDINARY / SERIES A-1 PREFERRED / SERIES A-2 PREFERRED / SERIES SEED PREFERRED
ADAM J. ROSENBERG REVOCABLE TRUST U/D/T DATED JANUARY 5, 2006—545,818ORDINARY
MRCF5 SERVICE (H) PTY LTD AS TRUSTEE FOR MRCF5 (H) TRUST—519,695SERIES A-2 PREFERRED
RUTH MCKERNAN—431,456ORDINARY
DAVID REYNOLDS—390,000ORDINARY
MRCF5 SERVICE (TS) PTY LTD AS TRUSTEE FOR MRCF5 (TS) TRUST—377,960SERIES A-2 PREFERRED
MRCF5 SERVICE (SW) PTY LTD AS TRUSTEE FOR MRCF5 (SW) TRUST—236,225SERIES A-2 PREFERRED
JAMES BILSLAND—230,970ORDINARY
PAUL WHITING—212,500ORDINARY
MRCF5 SERVICE (CSL) PTY LTD AS TRUSTEE FOR MRCF5 (CSL) TRUST—188,981SERIES A-2 PREFERRED
PAUL FISH—145,833ORDINARY
TIMOTHY PETER WARREN EDWARDS—119,977ORDINARY
GILES HARDINGHAM—100,000ORDINARY
SHANE LIDDLELOW—100,000ORDINARY
Show all 31 shareholders
ShareholderStakeSharesClass
TECHNOLOGY FUND 2 LP)—95,912SERIES A-2 PREFERRED
UTF GENERAL PARTNER 2 LLP (FOR AND ON BEHALF OF UCL—95,912SERIES A-2 PREFERRED
MAGDA BICTASH—76,563ORDINARY
HANNAH PEARCE—40,000ORDINARY
ELLIOT BAYLE—34,375ORDINARY
MRCF PTY LTD AS TRUSTEE FOR MRCF TRUST—12,747SERIES A-2 PREFERRED

People with significant control · 0 current

Who controls ASTRONAUTX LIMITED

ASTRONAUTX LIMITED's people with significant control as registered at Companies House on 12 November 2026: 0 current and 4 former. They are the people and companies that hold more than 25% of its shares or voting rights, or otherwise control it.

Current

Companies House lists no current people with significant control.

Former (4)

NameNature of controlNotifiedCeased
Dementia Discovery Gp LpShares: more than 25% but not more than 50%12 July 202420 December 2024
Sv Health Managers LlpSignificant influence or control1 April 201912 July 2024
Mr David ReynoldsShares: more than 25% but not more than 50%
Voting rights: more than 25% but not more than 50%		1 April 20192 March 2020
Ms Ruth MckernanShares: more than 25% but not more than 50%
Voting rights: more than 25% but not more than 50%		1 April 20192 March 2020

Officers · 8 current

Who runs ASTRONAUTX LIMITED

ASTRONAUTX LIMITED's directors and secretaries as registered at Companies House on 12 November 2026: 8 current and 4 former.

Current officers (8)

NameRoleAppointedNationalityCountry of residence
BARKER, Laurence Daniel PaulDirector25 March 2020BritishUnited Kingdom
CORRIGAN, Mark Herman, Dr.Director1 February 2024AmericanUnited States
FOLEY, Todd ThomasDirector17 August 2023AmericanUnited States
RHODES, Jane Kathleen ReltonDirector3 September 2024AmericanUnited States
ROSENBERG, AdamDirector17 November 2025AmericanUnited States
SCHELTENS, Philippus, ProfessorDirector2 October 2023DutchNetherlands
TOBIN, Jonathan LeslieDirector2 October 2023BritishUnited Kingdom
UTENG, Marianne, DrDirector17 August 2023NorwegianSwitzerland

Former officers (4)

NameRoleAppointedResigned
DINES, Jonathon AlanDirector1 April 201925 March 2020
EDWARDS, Timothy Peter WarrenDirector19 September 201917 November 2025
MCKERNAN, RuthDirector1 April 201926 September 2024
REYNOLDS, DavidDirector1 April 201926 September 2024

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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