Form 8.3 - Amendment | Company Announcement

*A Private Investor is a recipient of the information who meets all of the conditions set out below, the recipient:

Obtains access to the information in a personal capacity;
Is not required to be regulated or supervised by a body concerned with the regulation or supervision of investment or financial services;
Is not currently registered or qualified as a professional securities trader or investment adviser with any national or state exchange, regulatory authority, professional association or recognised professional body;
Does not currently act in any capacity as an investment adviser, whether or not they have at some time been qualified to do so;
Uses the information solely in relation to the management of their personal funds and not as a trader to the public or for the investment of corporate funds;
Does not distribute, republish or otherwise provide any information or derived works to any third party in any manner or use or process information or derived works for any commercial purposes.

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(a) Full name of discloser:	Qube Research & Technologies Limited
(b) Owner or controller of interests and short positions disclosed, if different from 1(a): *The naming of nominee or vehicle companies is insufficient. For a trust, the trustee(s), settlor and beneficiaries must be named.*
(c) Name of offeror/offeree in relation to whose relevant securities this form relates: *Use a separate form for each offeror/offeree*	SENIOR PLC
(d) If an exempt fund manager connected with an offeror/offeree, state this and specify identity of offeror/offeree:
(e) Date position held/dealing undertaken: *For an opening position disclosure, state the latest practicable date prior to the disclosure*	13-07-2026
(f) In addition to the company in 1(c) above, is the discloser making disclosures in respect of any other party to the offer? *If it is a cash offer or possible cash offer, state “N/A”*	N/A

Class of relevant security:	10p ordinary
	Interests		Short positions
	Number	%	Number	%
(1) Relevant securities owned and/or controlled:	0	0.00	0	0.00
(2) Cash-settled derivatives:	8,181,912	1.95	0	0.00
(3) Stock-settled derivatives (including options) and agreements to purchase/sell:	0	0.00	0	0.00
TOTAL:	8,181,912	1.95	0	0.00

Class of relevant security	Product description *e.g. call option*	Nature of dealing *e.g. opening/closing a long/short position, increasing/reducing a long/short position*	Number of securities	Exercise price per unit (GBp)
10p ordinary	equity swap	decreasing a long position	33610	288.50
10p ordinary	equity swap	decreasing a long position	4721	288.75
10p ordinary	equity swap	decreasing a long position	4774	289.00
10p ordinary	equity swap	decreasing a short position	1762	288.75
10p ordinary	equity swap	decreasing a short position	8808	289.00
10p ordinary	equity swap	increasing a long position	5234	289.00
10p ordinary	equity swap	increasing a short position	2406	288.50
10p ordinary	equity swap	increasing a short position	937	288.75
10p ordinary	equity swap	increasing a short position	1735	289.00

Date of disclosure:	14-07-2026
Contact name:	Janice Falcao
Telephone number:	00442033140679

Form 8.3 - Amendment

Companies

UK 100

Latest directors dealings

Class of relevant security in relation to which subscription right exists:	0
Details, including nature of the rights concerned and relevant percentages:	0