ARIX Arix Bioscience Plc

NOTIFICATION OF MAJOR HOLDINGS (to be sent to the relevant issuer and to the FCA in Microsoft Word format if possible) i

1a. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached ii:

Arix Bioscience Plc

1b. Please indicate if the issuer is a non-UK issuer (please mark with an “X” if appropriate)

Non-UK issuer

2. Reason for the notification (please mark the appropriate box or boxes with an “X”)

An acquisition or disposal of voting rights

X

An acquisition or disposal of financial instruments

An event changing the breakdown of voting rights

Other (please specify) iii:

3. Details of person subject to the notification obligation iv

Name

RTW Investments, LP

City and country of registered office (if applicable)

New York, USA

4. Full name of shareholder(s) (if different from 3.) v

Name

RTW Biotech Opportunities Operating Ltd

City and country of registered office (if applicable)

St Peter Port, Guernsey

5. Date on which the threshold was crossed or reached vi:

17/01/2024

6. Date on which issuer notified (DD/MM/YYYY):

22/01/2024

7. Total positions of person(s) subject to the notification obligation

% of voting rights attached to shares (total of 8. A)

% of voting rights through financial instruments
(total of 8.B 1 + 8.B 2)

Total of both in % (8.A + 8.B)

Total number of voting rights held in issuer (8.A + 8.B) vii

Resulting situation on the date on which threshold was crossed or reached

25.52

0.00%

25.52%

33,023,210

Position of previous notification (if

applicable)

n/a

n/a

n/a

9. Information in relation to the person subject to the notification obligation (please mark the

applicable box with an “X”)

Person subject to the notification obligation is not controlled by any natural person or legal entity and does not control any other undertaking(s) holding directly or indirectly an interest in the (underlying) issuer xiii

Full chain of controlled undertakings through which the voting rights and/or the
financial instruments are effectively held starting with the ultimate controlling natural person or legal entity (please add additional rows as necessary) xiv

Name xv

% of voting rights if it equals or is higher than the notifiable threshold

% of voting rights through financial instruments if it equals or is higher than the notifiable threshold

Total of both if it equals or is higher than the notifiable threshold

Roderick Wong

RTW Investments GP LLC

RTW Investments, LP

RTW Biotech Opportunities Ltd

RTW Biotech Opportunities Operating Ltd

25.52%

0.00%

25.52%

10. In case of proxy voting, please identify:

Name of the proxy holder

The number and % of voting rights held

The date until which the voting rights will be held

11. Additional information xvi

Place of completion

London, UK

Date of completion

19/01/2024