FIREBRICK PHARMA LIMITED — Major Shareholding Notification 2026

May 29, 2026

Form 604

Corporations Act 2001
Section 671B

Notice of change of interests of substantial holder

To Company Name/Scheme
FRE - FIREBRICK PHARMA LIMITED

ACN/ARSN
157 765 896

1. Details of substantial holder(1)

Name
GZ FAMILY HOLDINGS PTY LTD ATF GZ FAMILY TRUST and GZ SUPER INVESTMENTS PTY LTD ATF GZ SUPERANNUATION FUND

ACN/ARSN (if applicable)
641 991 415 and 666 406 515

There was a change in the interests of the substantial holder on
17 / 04 / 2026

The previous notice was given to the company on
01 / 09 / 2025

The previous notice was dated
01 / 09 / 2025

2. Previous and present voting power

The total number of votes attached to all the voting shares in the company or voting interests in the scheme that the substantial holder or an associate (2) had a relevant interest (3) in when last required, and when now required, to give a substantial holding notice to the company or scheme, are as follows:

Class of securities (4)	Previous notice		Present notice
	Person's votes	Voting power (5)	Person's votes	Voting power (5)
Ordinary shares	24,255,058	9.71%	24,255,058	8.51%

3. Changes in relevant interests

Particulars of each change in, or change in the nature of, a relevant interest of the substantial holder or an associate in voting securities of the company or scheme, since the substantial holder was last required to give a substantial holding notice to the company or scheme are as follows:

Date of change	Person whose relevant interest changed	Nature of change (6)	Consideration given in relation to change (7)	Class and number of securities affected	Person's votes affected
	As per Annexure A

4. Present relevant interests

Particulars of each relevant interest of the substantial holder in voting securities after the change are as follows:

Holder of relevant interest	Registered holder of securities	Person entitled to be registered as holder (8)	Nature of relevant interest (6)	Class and number of securities	Person's votes
GZ Family Trust	GZ Family Holdings Pty Ltd	GZ Family Holdings Pty Ltd	Registered Holder	23,140,763 Ordinary	23,140,763
GZ Superannuation Fund	GZ Super Investments Pty Ltd	GZ Super Investments Pty Ltd	Registered Holder	1,114,295 Ordinary	1,114,295

---

5. Changes in association

The persons who have become associates (2) of, ceased to be associates of, or have changed the nature of their association (9) with, the substantial holder in relation to voting interests in the company or scheme are as follows:

Name and ACN/ARSN (if applicable)	Nature of association
N/A

6. Addresses

The addresses of persons named in this form are as follows:

Name	Address
GZ Family Holdings Pty Ltd	146 Old Stock Route Rd Oakville NSW 2765
GZ Super Investments Pty Ltd	146 Old Stock Route Rd Oakville NSW 2765

Signature

print name
QIXIN GAO
capacity
DIRECTOR

sign here

date
29/05/ 2026

---

DIRECTIONS

(1) If there are a number of substantial holders with similar or related relevant interests (eg. a corporation and its related corporations, or the manager and trustee of an equity trust), the names could be included in an annexure to the form.

(2) See the definition of "associate" in section 9 of the Corporations Act 2001.

(3) See the definition of "relevant interest" in sections 608 and 671B(7) of the Corporations Act 2001.

(4) The voting shares of a company constitute one class unless divided into separate classes.

(5) The person's votes divided by the total votes in the body corporate or scheme multiplied by 100.

(6) Include details of: (a) any relevant agreement or other circumstances because of which the change in relevant interest occurred; and (b) any qualification of the power of a person to exercise, control the exercise of, or influence the exercise of, the voting powers or disposal of the securities.

(7) Details of the consideration must include any and all benefits, money and other, that any person from whom a relevant interest was acquired has, or may, become entitled to receive in relation to that acquisition.

(8) If the substantial holder is unable to determine the identity of the person write "unknown".

(9) Give details, if appropriate, of the present association and any change in that association since the last substantial holding notice.

---

Annexure A

Changes in relevant interests since last notice (Form 604 dated 1 September 2025):

Date of Change	Entity	Nature of Change	Consideration	Class and Number of Securities Affected	Person's Votes Affected
11/09/2025	GZ Family Holdings Pty Ltd	Due to change in Shares on issue after option exercise / employee plan conducted by the company on 11/09/2025 (647,452 new ordinary shares issued)	N/A	N/A	N/A
11/09/2025	GZ Super Investments Pty Ltd	Due to change in Shares on issue after option exercise / employee plan conducted by the company on 11/09/2025 (647,452 new ordinary shares issued)	N/A	N/A	N/A
17/10/2025	GZ Family Holdings Pty Ltd	Due to change in Shares on issue after the Placement conducted by the company on 17/10/2025 (1,200,000 new ordinary shares issued)	N/A	N/A	N/A
17/10/2025	GZ Super Investments Pty Ltd	Due to change in Shares on issue after the Placement conducted by the company on 17/10/2025 (1,200,000 new ordinary shares issued)	N/A	N/A	N/A
12/02/2026	GZ Family Holdings Pty Ltd	Due to change in Shares on issue after shares issued to a consultant in lieu of fees by the company on 12/02/2026 (907,716 new ordinary shares issued)	N/A	N/A	N/A
12/02/2026	GZ Super Investments Pty Ltd	Due to change in Shares on issue after shares issued to a consultant in lieu of fees by the company on 12/02/2026 (907,716 new ordinary shares issued)	N/A	N/A	N/A
13/04/2026	GZ Family Holdings Pty Ltd	Due to change in Shares on issue after the Placement and option exercise conducted by the company on 13/04/2026 (21,636,603 new ordinary shares issued)	N/A	N/A	N/A
13/04/2026	GZ Super Investments Pty Ltd	Due to change in Shares on issue after the Placement and option exercise conducted by the company on 13/04/2026 (21,636,603 new ordinary shares issued)	N/A	N/A	N/A
17/04/2026	GZ Family Holdings Pty Ltd	Due to change in Shares on issue after the Placement conducted by the company on 17/04/2026 (10,638,297 new ordinary shares issued).	N/A	N/A	N/A
17/04/2026	GZ Super Investments Pty Ltd	Due to change in Shares on issue after the Placement conducted by the company on 17/04/2026 (10,638,297 new ordinary shares issued).	N/A	N/A	N/A

---

21/05/2026	GZ Family Holdings Pty Ltd	Due to change in Shares on issue after option exercise conducted by the company on 21/05/2026 (225,000 new ordinary shares issued at $0.0167 per share, exercise of FREAB options). .	N/A	N/A	N/A
21/05/2026	GZ Super Investments Pty Ltd	Due to change in Shares on issue after option exercise conducted by the company on 21/05/2026 (225,000 new ordinary shares issued at $0.0167 per share, exercise of FREAB options).	N/A	N/A	N/A