TR-1: Notification of major holdings

1. Issuer Details

ISIN

GB00BD045071

Issuer Name

ARIX BIOSCIENCE PLC

UK or Non-UK Issuer

UK

2. Reason for Notification

An acquisition or disposal of voting rights

3. Details of person subject to the notification obligation

Name

Acacia Research Corporation

City of registered office (if applicable)

Country of registered office (if applicable)

4. Details of the shareholder

5. Date on which the threshold was crossed or reached

28-Apr-2022

6. Date on which Issuer notified

03-May-2022

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

8. Notified details of the resulting situation on the date on which the threshold was crossed or reached

8A. Voting rights attached to shares

8B1. Financial Instruments according to (DTR5.3.1R.(1) (a))

8B2. Financial Instruments with similar economic effect according to (DTR5.3.1R.(1) (b))

9. Information in relation to the person subject to the notification obligation

2. 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 entities (please add additional rows as necessary)

10. In case of proxy voting

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

Merton Acquisition Holdco LLC is a wholly-owned subsidiary of Acacia Research Corporation.

12. Date of Completion

03-May-2022

13. Place Of Completion

New York, New York, USA