RNS Number : 0658U

Citadel Group

05 August 2025

Ap27

FORM 8.3

IRISH TAKEOVER PANEL

OPENING POSITION DISCLOSURE/DEALING DISCLOSURE UNDER RULE 8.3 OF THE IRISH TAKEOVER PANEL ACT, 1997, TAKEOVER

RULES, 2022 BY PERSONS WITH INTERESTS IN RELEVANT SECURITIES REPRESENTING 1% OR MORE

1.             KEY INFORMATION

(a)   Full name of discloser	Citadel Group
(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.	N/A
(c)   Name of offeror/offeree in relation to whose relevant securities this form relates Use a separate form for each offeror/offeree	MURAL ONCOLOGY PLC
(d)   If an exempt fund manager connected with an offeror/offeree, state this and specify identity of offeror/offeree (Note 1)	N/A
(e)   Date position held/dealing undertaken For an opening position disclosure, state the latest practicable date prior to the disclosure	4 August 2025
(f)    In addition to the company in 1(c) above, is the discloser also 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

2.             INTERESTS AND SHORT POSITIONS

If there are interests and short positions to disclose in more than one class of relevant securities of the offeror or offeree named in 1(c), copy table 2 for each additional class of relevant security.

Ap28

Interests and short positions in the relevant securities of the offeror or offeree to which the disclosure relates following the dealing (if any)

(Note 2)

Class of relevant security (Note 3)	Common Stock ISIN IE000LK2BOB4 $0.01 ordinary shares
	Interests		Short positions
	Number	%	Number	%
(1)   Relevant securities owned and/or controlled	197,491	1.13	0	0.00
(2)   Cash-settled derivatives	253	0.00	23	0.00
(3)   Stock-settled derivatives (including options) and agreements to purchase/ sell	16,800	0.09	96,700	0.55
Total	214,544	1.23	96,723	0.55

All interests and all short positions should be disclosed.

Details of options including rights to subscribe for new securities and any open stock-settled derivative positions (including traded options), or agreements to purchase or sell relevant securities, should be given on a Supplemental Form 8.

3.             DEALINGS (IF ANY) BY THE PERSON MAKING THE DISCLOSURE (Note 4)

Where there have been dealings in more than one class of relevant securities of the offeror or offeree named in 1(c), copy table 3(a), (b), (c) or (d) (as appropriate) for each additional class of relevant security dealt in.

The currency of all prices and other monetary amounts should be stated.

(a)           Purchases and sales

Class of relevant security	Purchase/sale	Number of securities	Price per unit (Note 5)
Common	Buy Transaction	151	1.6300 USD
Common	Buy Transaction	200	1.6750 USD
Common	Buy Transaction	62	1.7200 USD
Common	Buy Transaction	100	1.7400 USD
Common	Buy Transaction	10,493	1.7830 USD
Common	Buy Transaction	1	1.7900 USD
Common	Buy Transaction	290	1.7913 USD
Common	Buy Transaction	14	1.7950 USD
Common	Buy Transaction	101	1.8000 USD
Common	Buy Transaction	199	1.8003 USD
Common	Buy Transaction	733	1.8050 USD
Common	Buy Transaction	25	1.8052 USD
Common	Buy Transaction	2,631	1.8055 USD
Common	Buy Transaction	10,703	1.8118 USD
Common	Buy Transaction	26	1.8200 USD
Common	Buy Transaction	76	1.8290 USD
Common	Buy Transaction	2	1.8300 USD
Common	Buy Transaction	365	1.8342 USD
Common	Buy Transaction	13	1.8369 USD
Common	Buy Transaction	1	1.8394 USD
Common	Buy Transaction	13	1.8431 USD
Common	Buy Transaction	476	1.8475 USD
Common	Buy Transaction	1,500	1.8493 USD
Common	Buy Transaction	3,002	1.8500 USD
Common	Buy Transaction	1,500	1.8501 USD
Common	Buy Transaction	260	1.8501 USD
Common	Buy Transaction	21,749	1.8505 USD
Common	Buy Transaction	101	1.8510 USD
Common	Buy Transaction	14,698	1.8535 USD
Common	Buy Transaction	3,708	1.8596 USD
Common	Buy Transaction	219	1.8599 USD
Common	Buy Transaction	10,767	1.8600 USD
Common	Buy Transaction	1,812	1.8710 USD
Common	Buy Transaction	6,233	1.8828 USD
Common	Buy Transaction	3,949	1.8929 USD
Common	Buy Transaction	15,823	1.8948 USD
Common	Buy Transaction	18,769	1.8970 USD
Common	Buy Transaction	3,123	1.8991 USD
Common	Buy Transaction	2,200	1.9483 USD
Common	Buy Transaction	1,051	1.9500 USD
Common	Buy Transaction	47,907	1.9724 USD
Common	Buy Transaction	54	1.9772 USD
Common	Buy Transaction	6,623	2.0135 USD
Common	Buy Transaction	1,400	2.0200 USD
Common	Buy Transaction	1,609	2.0226 USD
Common	Buy Transaction	201	2.0229 USD
Common	Buy Transaction	400	2.0350 USD
Common	Buy Transaction	3,000	2.0400 USD
Common	Buy Transaction	1,450	2.0414 USD
Common	Buy Transaction	400	2.0500 USD
Common	Buy Transaction	2,269	2.0500 USD
Common	Buy Transaction	513	2.0501 USD
Common	Buy Transaction	734	2.0548 USD
Common	Buy Transaction	2	2.0550 USD
Common	Buy Transaction	218	2.0696 USD
Common	Buy Transaction	502	2.0989 USD
Common	Buy Transaction	6,203	2.1000 USD
Common	Buy Transaction	9,996	2.1004 USD
Common	Buy Transaction	10	2.1110 USD
Common	Buy Transaction	3,198	2.1215 USD
Common	Buy Transaction	5,622	2.1400 USD
Common	Buy Transaction	14,378	2.1517 USD
Common	Buy Transaction	3,510	2.1568 USD
Common	Buy Transaction	9	2.1811 USD
Common	Buy Transaction	4,297	2.1990 USD
Common	Sell Transaction	700	1.6186 USD
Common	Sell Transaction	452	1.7900 USD
Common	Sell Transaction	256	1.7911 USD
Common	Sell Transaction	2,000	1.7990 USD
Common	Sell Transaction	995	1.8000 USD
Common	Sell Transaction	3,280	1.8034 USD
Common	Sell Transaction	49	1.8051 USD
Common	Sell Transaction	8	1.8100 USD
Common	Sell Transaction	1,376	1.8197 USD
Common	Sell Transaction	13	1.8262 USD
Common	Sell Transaction	152	1.8290 USD
Common	Sell Transaction	685	1.8292 USD
Common	Sell Transaction	150	1.8296 USD
Common	Sell Transaction	8,551	1.8300 USD
Common	Sell Transaction	20	1.8350 USD
Common	Sell Transaction	898	1.8380 USD
Common	Sell Transaction	16,179	1.8382 USD
Common	Sell Transaction	500	1.8399 USD
Common	Sell Transaction	3,891	1.8446 USD
Common	Sell Transaction	2,020	1.8452 USD
Common	Sell Transaction	555	1.8464 USD
Common	Sell Transaction	2,531	1.8500 USD
Common	Sell Transaction	7,695	1.8511 USD
Common	Sell Transaction	198	1.8550 USD
Common	Sell Transaction	55	1.8595 USD
Common	Sell Transaction	11	1.8600 USD
Common	Sell Transaction	162	1.8610 USD
Common	Sell Transaction	510	1.8646 USD
Common	Sell Transaction	500	1.8660 USD
Common	Sell Transaction	91	1.8690 USD
Common	Sell Transaction	50	1.8700 USD
Common	Sell Transaction	1,461	1.9149 USD
Common	Sell Transaction	2,390	1.9211 USD
Common	Sell Transaction	660	1.9223 USD
Common	Sell Transaction	2,002	1.9289 USD
Common	Sell Transaction	470	1.9325 USD
Common	Sell Transaction	590	1.9364 USD
Common	Sell Transaction	8,270	1.9364 USD
Common	Sell Transaction	8,763	1.9470 USD
Common	Sell Transaction	1,999	1.9613 USD
Common	Sell Transaction	2	1.9655 USD
Common	Sell Transaction	1,826	1.9681 USD
Common	Sell Transaction	25,098	1.9795 USD
Common	Sell Transaction	360	1.9800 USD
Common	Sell Transaction	100	1.9850 USD
Common	Sell Transaction	300	1.9900 USD
Common	Sell Transaction	18,657	1.9926 USD
Common	Sell Transaction	1,119	2.0018 USD
Common	Sell Transaction	1,400	2.0200 USD
Common	Sell Transaction	1,505	2.0300 USD
Common	Sell Transaction	500	2.0397 USD
Common	Sell Transaction	3,000	2.0400 USD
Common	Sell Transaction	1	2.0729 USD
Common	Sell Transaction	142	2.0816 USD
Common	Sell Transaction	200	2.0850 USD
Common	Sell Transaction	653	2.1002 USD
Common	Sell Transaction	1,050	2.1219 USD
Common	Sell Transaction	600	2.1292 USD
Common	Sell Transaction	5,100	2.1427 USD
Common	Sell Transaction	100	2.1700 USD
Common	Sell Transaction	100	2.1800 USD
Common	Sell Transaction	3	2.2400 USD
Common	Sell Transaction	700	2.2500 USD
Common	Sell Transaction	538	2.2600 USD

Ap29

(b)           Cash-settled derivative transactions

Class of relevant security	Product description e.g. CFD	Nature of dealing e.g. opening/ closing a long/ short position, increasing/ reducing a long/ short position	Number of reference securities (Note 6)	Price per unit (Note 5)
Common	CFD	Increasing short position/ Reducing long position	97	1.7950 USD
Common	CFD	Closing short position/Opening long position	97	1.8000 USD
Common	CFD	Closing short position/Opening long position	253	1.8599 USD

(c)           Stock-settled derivative transactions (including options)

(i)            Writing, selling, purchasing or varying

Class of relevant security	Product description e.g. call option	Writing, purchasing, selling, varying etc.	Number of securities to which option relates (Note 6)	Exercise price per unit	Type e.g. American, European etc.	Expiry date	Option money paid/ received per unit
Common	Call Option	Buy Transaction	300	2.5000 USD	American	2025-08-15	0.0500 USD
Common	Call Option	Buy Transaction	12,000	5.0000 USD	American	2027-01-15	0.1000 USD
Common	Call Option	Buy Transaction	2,400	2.5000 USD	American	2025-12-19	0.1000 USD
Common	Call Option	Buy Transaction	400	2.5000 USD	American	2025-12-19	0.1500 USD
Common	Call Option	Buy Transaction	100	5.0000 USD	American	2027-01-15	0.1700 USD
Common	Put Option	Buy Transaction	800	2.5000 USD	American	2025-08-15	0.4500 USD
Common	Put Option	Buy Transaction	1,400	2.5000 USD	American	2025-08-15	0.5000 USD
Common	Put Option	Buy Transaction	100	2.5000 USD	American	2025-12-19	0.6000 USD
Common	Put Option	Buy Transaction	100	5.0000 USD	American	2025-08-15	2.9500 USD
Common	Put Option	Buy Transaction	100	7.5000 USD	American	2025-08-15	5.5000 USD
Common	Call Option	Sell Transaction	200	5.0000 USD	American	2027-01-15	0.1000 USD
Common	Call Option	Sell Transaction	200	5.0000 USD	American	2027-01-15	0.1200 USD
Common	Call Option	Sell Transaction	1,300	5.0000 USD	American	2027-01-15	0.1500 USD
Common	Call Option	Sell Transaction	100	2.5000 USD	American	2027-01-15	0.2900 USD
Common	Call Option	Sell Transaction	100	2.5000 USD	American	2027-01-15	0.3500 USD

(ii)           Exercise

Class of
relevant
security Product
description
e.g. call
option Exercising/
exercised
against Number of
securities Exercise
price per
unit
(Note 5)

(d)           Other dealings (including transactions in respect of new securities) (Note 3)

Class of
relevant
security Nature of dealing
e.g. subscription,
conversion, exercise Details Price per unit (if
applicable)
(Note 5)

Ap30

4.             OTHER INFORMATION

(a)           Indemnity and other dealing arrangements

Details of any indemnity or option arrangement, or any agreement or understanding, formal or informal, relating to relevant securities which may be an inducement to deal or refrain from dealing entered into by the person making the disclosure and any party to the offer or any person acting in concert with a party to the offer.

Irrevocable commitments and letters of intent should not be included. If there are no such agreements, arrangements or understandings, state "none"

 None

(b)           Agreements, arrangements or understandings relating to options or derivatives

Full details of any agreement, arrangement or understanding between the person disclosing and any other person relating to the voting rights of any relevant securities under any option referred to on this form or relating to the voting rights or future acquisition or disposal of any relevant securities to which any derivative referred to on this form is referenced. If none, this should be stated.

 None

(c)           Attachments

Is a Supplemental Form 8 attached? YES

Date of disclosure	5 August 2025
Contact name	Paula Santos
Telephone number	020 7645 9700

Public disclosures under Rule 8.3 of the Rules must be made to a Regulatory Information Service.

Ap32

SUPPLEMENTAL FORM 8

IRISH TAKEOVER PANEL

DISCLOSURE UNDER RULE 8.1, RULE 8.3, RULE 38.5(b) AND
RULE 38.6 OF THE IRISH TAKEOVER PANEL ACT, 1997,
TAKEOVER RULES, 2022

DETAILS OF OPEN STOCK-SETTLED DERIVATIVE (INCLUDING
OPTION) POSITIONS, AGREEMENTS TO PURCHASE OR SELL AND
RIGHTS TO SUBSCRIBE FOR NEW SECURITIES

1.             KEY INFORMATION

Full name of person making disclosure:	Citadel Group
Name of offeror/offeree in relation to whose relevant securities the disclosure relates:	MURAL ONCOLOGY PLC

2.             STOCK-SETTLED DERIVATIVES (INCLUDING OPTIONS)

Class of relevant security	Product description e.g. call option	Written or purchased	Number of securities to which option or derivative relates	Exercise price per unit	Type e.g. American, European etc.	Expiry date
Common	Put Option	Purchased	-7,200	2.5 USD	American	19/09/2025
Common	Call Option	Purchased	400	2.5 USD	American	15/08/2025
Common	Call Option	Purchased	800	5.0 USD	American	19/12/2025
Common	Put Option	Purchased	-53,200	2.5 USD	American	15/01/2027
Common	Call Option	Purchased	14,600	5.0 USD	American	19/09/2025
Common	Put Option	Purchased	-200	5.0 USD	American	19/09/2025
Common	Put Option	Purchased	-200	7.5 USD	American	15/08/2025
Common	Put Option	Purchased	-4,500	2.5 USD	American	15/08/2025
Common	Call Option	Purchased	1,000	5.0 USD	American	20/03/2026
Common	Put Option	Purchased	-3,100	2.5 USD	American	19/12/2025
Common	Put Option	Purchased	-200	5.0 USD	American	15/08/2025
Common	Call Option	Sold	-1,600	5.0 USD	American	15/01/2027
Common	Call Option	Sold	-17,200	2.5 USD	American	19/09/2025
Common	Call Option	Sold	-1,400	2.5 USD	American	19/12/2025
Common	Call Option	Sold	-400	2.5 USD	American	20/03/2026
Common	Call Option	Sold	-200	7.5 USD	American	19/09/2025
Common	Call Option	Sold	-7,300	2.5 USD	American	15/01/2027

3.             AGREEMENTS TO PURCHASE OR SELL

Full details should be given so that the nature of the interest or position can be fully understood:

Ap33

4.             RIGHTS TO SUBSCRIBE FOR NEW SECURITIES (INCLUDING DIRECTORS' AND OTHER EMPLOYEE OPTIONS)

Class of relevant security in relation to which subscription right exists:

Details, including nature of the rights concerned and relevant percentages:

It is not necessary to provide details on a Supplemental Form with regard to cash-settled derivatives.

The currency of all prices and other monetary amounts should be stated.

For full details of disclosure requirements, see Rule 8 of the Rules. If in doubt, consult the Panel.

References in these notes to "the Rules" are to the Irish Takeover Panel Act, 1997, Takeover Rules, 2022.

This information is provided by RNS, the news service of the London Stock Exchange. RNS is approved by the Financial Conduct Authority to act as a Primary Information Provider in the United Kingdom. Terms and conditions relating to the use and distribution of this information may apply. For further information, please contact rns@lseg.com or visit www.rns.com.

RNS may use your IP address to confirm compliance with the terms and conditions, to analyse how you engage with the information contained in this communication, and to share such analysis on an anonymised basis with others as part of our commercial services. For further information about how RNS and the London Stock Exchange use the personal data you provide us, please see our Privacy Policy.

END

ITPPKPBPKBKDAFK