Rua Bioscience Limited — Major Shareholding Notification 2026

Jan 20, 2026

Disclosure of movement of 1% or more in substantial holding or change in nature of relevant interest, or both

Sections 277 and 278, Financial Markets Conduct Act 2013

To NZX Limited

and

To Rua Bioscience Limited

Relevant event being disclosed: Disclosure of movement of 1% or more in substantial holding.

Date of relevant event: 18 December 2025

Date this disclosure made: 20 January 2026

Date last disclosure made: n/a

Substantial product holder(s) giving disclosure

Full name(s): Gough Investment Capital Limited

Summary of substantial holding

Class of quoted voting products: Ordinary Shares in RUA NZX Code: RUA

Summary for Gough Investment Capital Limited

For this disclosure,—

• (a) total number held in class: 17,383,344

• (b) total in class: 338,041,705

• (c) total percentage held in class: 5.14%

• For last disclosure,—

• (a) total number held in class: n/a

• (b) total in class: n/a

• (c) total percentage held in class: n/a

Details of transactions and events giving rise to relevant event

Details of the transactions or other events requiring disclosure:

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Rua Bioscience offered New Shares to shareholders as part of a pro-rata rights offer in November and December 2025. Gough Investment Capital Limited did not participate in the capital raise. As a result, the shareholding percentage has decreased by more than 1%. No change occurred to the number of shares held.

Details after relevant event

Details for Gough Investment Capital Limited

Nature of relevant interest(s): Registered holder of shares as below.

For that relevant interest,—

• (a) number held in class: 17,383,344

• (b) percentage held in class: 5.14%

• (c) current registered holder(s): Gough Investment Capital Limited

• (d) registered holder(s) once transfers are registered: n/a

• For a derivative relevant interest, also—

• (a) type of derivative: Not Applicable

• (b) details of derivative: Not Applicable

• (c) if the substantial product holder is not a party to the derivative, the nature of the relevant interest in the derivative:

Additional information

Address(es) of substantial product holder(s): Gough Investment Capital Limited, Level, 4, 48 Hereford St, Christchurch 8013

Contact details: Kirsten Farrelly, Kirsten.farrelly@gough.co.nz, ph (03) 379 7213

Certification

I, Kirsten Farrelly , certify that, to the best of my knowledge and belief, the information contained in this disclosure is correct and that I am duly authorised to make this disclosure by all persons for whom it is made.

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