RNS Number : 2747W

Citadel Group

21 August 2025

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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	20 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.

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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	459,500	2.65	0	0.00
(2)   Cash-settled derivatives	0	0.00	23	0.00
(3)   Stock-settled derivatives (including options) and agreements to purchase/ sell	28,100	0.16	212,800	1.22
Total	487,600	2.81	212,823	1.22

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	284	2.0600 USD
Common	Buy Transaction	143	2.0614 USD
Common	Buy Transaction	167	2.0643 USD
Common	Buy Transaction	516	2.0673 USD
Common	Buy Transaction	195	2.0686 USD
Common	Buy Transaction	14,759	2.0700 USD
Common	Buy Transaction	4,890	2.0705 USD
Common	Buy Transaction	5,518	2.0705 USD
Common	Buy Transaction	252	2.0720 USD
Common	Buy Transaction	1,200	2.0726 USD
Common	Buy Transaction	17,861	2.0736 USD
Common	Buy Transaction	997	2.0740 USD
Common	Buy Transaction	5,295	2.0746 USD
Common	Buy Transaction	16,650	2.0773 USD
Common	Buy Transaction	138	2.0785 USD
Common	Buy Transaction	584	2.0791 USD
Common	Buy Transaction	22,448	2.0792 USD
Common	Buy Transaction	3,600	2.0799 USD
Common	Buy Transaction	107,023	2.0800 USD
Common	Buy Transaction	4,500	2.0801 USD
Common	Buy Transaction	1,502	2.0803 USD
Common	Buy Transaction	33,498	2.0803 USD
Common	Buy Transaction	10,833	2.0805 USD
Common	Buy Transaction	5,000	2.0806 USD
Common	Buy Transaction	32	2.0806 USD
Common	Buy Transaction	3,200	2.0808 USD
Common	Buy Transaction	13	2.0808 USD
Common	Buy Transaction	553	2.0808 USD
Common	Buy Transaction	987	2.0809 USD
Common	Buy Transaction	1,985	2.0810 USD
Common	Buy Transaction	200	2.0810 USD
Common	Buy Transaction	1,050	2.0812 USD
Common	Buy Transaction	295	2.0812 USD
Common	Buy Transaction	42	2.0812 USD
Common	Buy Transaction	25	2.0812 USD
Common	Buy Transaction	393	2.0812 USD
Common	Buy Transaction	8	2.0812 USD
Common	Buy Transaction	1,111	2.0818 USD
Common	Buy Transaction	200	2.0820 USD
Common	Buy Transaction	1,553	2.0820 USD
Common	Buy Transaction	952	2.0823 USD
Common	Buy Transaction	21	2.0843 USD
Common	Buy Transaction	9,738	2.0845 USD
Common	Buy Transaction	194	2.0847 USD
Common	Buy Transaction	54	2.0848 USD
Common	Buy Transaction	65,482	2.0850 USD
Common	Buy Transaction	405	2.0850 USD
Common	Buy Transaction	712	2.0851 USD
Common	Buy Transaction	1,350	2.0852 USD
Common	Buy Transaction	13	2.0854 USD
Common	Buy Transaction	27,575	2.0854 USD
Common	Buy Transaction	12	2.0858 USD
Common	Buy Transaction	35,352	2.0860 USD
Common	Buy Transaction	2	2.0860 USD
Common	Buy Transaction	670	2.0860 USD
Common	Buy Transaction	700	2.0872 USD
Common	Buy Transaction	3,340	2.0893 USD
Common	Buy Transaction	1,782	2.0894 USD
Common	Buy Transaction	5,399	2.0895 USD
Common	Buy Transaction	155	2.0897 USD
Common	Buy Transaction	6,189	2.0897 USD
Common	Buy Transaction	8,638	2.0899 USD
Common	Buy Transaction	13,855	2.0900 USD
Common	Sell Transaction	441	2.0600 USD
Common	Sell Transaction	133	2.0608 USD
Common	Sell Transaction	990	2.0610 USD
Common	Sell Transaction	30	2.0627 USD
Common	Sell Transaction	2,412	2.0637 USD
Common	Sell Transaction	13,663	2.0639 USD
Common	Sell Transaction	2,000	2.0650 USD
Common	Sell Transaction	4,100	2.0655 USD
Common	Sell Transaction	307	2.0661 USD
Common	Sell Transaction	185	2.0680 USD
Common	Sell Transaction	7,341	2.0687 USD
Common	Sell Transaction	344	2.0689 USD
Common	Sell Transaction	36	2.0689 USD
Common	Sell Transaction	4,466	2.0697 USD
Common	Sell Transaction	4,000	2.0699 USD
Common	Sell Transaction	15,753	2.0700 USD
Common	Sell Transaction	1,950	2.0703 USD
Common	Sell Transaction	905	2.0706 USD
Common	Sell Transaction	142	2.0708 USD
Common	Sell Transaction	3,557	2.0719 USD
Common	Sell Transaction	3,601	2.0725 USD
Common	Sell Transaction	424	2.0762 USD
Common	Sell Transaction	15,000	2.0799 USD
Common	Sell Transaction	298	2.0800 USD
Common	Sell Transaction	62,215	2.0800 USD
Common	Sell Transaction	6,103	2.0801 USD
Common	Sell Transaction	553	2.0808 USD
Common	Sell Transaction	3,082	2.0810 USD
Common	Sell Transaction	25	2.0812 USD
Common	Sell Transaction	545	2.0820 USD
Common	Sell Transaction	880	2.0824 USD
Common	Sell Transaction	400	2.0825 USD
Common	Sell Transaction	6,900	2.0825 USD
Common	Sell Transaction	2,331	2.0844 USD
Common	Sell Transaction	420	2.0850 USD
Common	Sell Transaction	823	2.0850 USD
Common	Sell Transaction	451	2.0850 USD
Common	Sell Transaction	67	2.0851 USD
Common	Sell Transaction	6	2.0853 USD
Common	Sell Transaction	6,500	2.0862 USD
Common	Sell Transaction	5,591	2.0874 USD
Common	Sell Transaction	125	2.0880 USD
Common	Sell Transaction	30	2.0883 USD
Common	Sell Transaction	25	2.0884 USD
Common	Sell Transaction	45	2.0889 USD
Common	Sell Transaction	2,000	2.0892 USD
Common	Sell Transaction	14	2.0893 USD
Common	Sell Transaction	714	2.0893 USD
Common	Sell Transaction	4,970	2.0894 USD
Common	Sell Transaction	9,581	2.0895 USD
Common	Sell Transaction	14,515	2.0896 USD
Common	Sell Transaction	577	2.0899 USD
Common	Sell Transaction	2,909	2.0900 USD

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(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)

(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	Put Option	Buy Transaction	9,000	2.5000 USD	American	2025-09-19	0.4000 USD
Common	Call Option	Sell Transaction	28,400	2.5000 USD	American	2027-01-15	0.0500 USD
Common	Call Option	Sell Transaction	500	2.5000 USD	American	2025-09-19	0.0500 USD
Common	Call Option	Sell Transaction	500	2.5000 USD	American	2026-03-20	0.0500 USD
Common	Call Option	Sell Transaction	2,000	2.5000 USD	American	2027-01-15	0.1000 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)

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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	21 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.

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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	-3,100	2.5 USD	American	19/12/2025
Common	Put Option	Purchased	-16,200	2.5 USD	American	19/09/2025
Common	Put Option	Purchased	-200	5.0 USD	American	19/09/2025
Common	Call Option	Purchased	8,800	2.5 USD	American	20/03/2026
Common	Call Option	Purchased	2,000	7.5 USD	American	20/03/2026
Common	Call Option	Purchased	800	5.0 USD	American	19/12/2025
Common	Call Option	Purchased	14,600	5.0 USD	American	19/09/2025
Common	Put Option	Purchased	-80,700	2.5 USD	American	15/01/2027
Common	Call Option	Purchased	900	5.0 USD	American	20/03/2026
Common	Call Option	Sold	-4,000	2.5 USD	American	19/12/2025
Common	Call Option	Sold	-17,700	2.5 USD	American	19/09/2025
Common	Call Option	Sold	-41,600	2.5 USD	American	15/01/2027
Common	Put Option	Sold	1,000	2.5 USD	American	17/10/2025
Common	Call Option	Sold	-200	7.5 USD	American	19/09/2025
Common	Call Option	Sold	-49,100	5.0 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:

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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.

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