ABACUS STORAGE KING — Major Shareholding Notification 2026

May 12, 2026

Docusign Envelope ID: 8B1026D2-6C63-4636-BF36-8CB1EB3BDD2C

Form 604

Corporations Act 2001

Section 671B

Notice of change of interests of substantial holder

To Company Name/Scheme	Abacus Storage King (ASX: ASK) comprising Abacus Storage Operations Limited (ACN 112 457 075) (ASOL) and Abacus Storage Property Trust (ARSN 111 629 559) (ASPT)
ACN/ARSN	ACN 112 457 075 / ARSN 111 629 559
1. Details of substantial holder (1)
Name	Iridium SP BidCo Pty Ltd ACN 693 497 844 (the Bidder Company), ITG Australia TS Sub Pty Ltd ACN 642 379 235 as trustee for Iridium SP Bid Trust (the Bidder Trustee), ITG Australia TS Sub Pty Ltd ACN 642 379 235 as trustee for the Iridium Platform Securities Trust III (Iridium III), Brookfield Australia Funds Management Limited ACN 104 643 629 as trustee for the Iridium Platform Securities Trust (Iridium Platform), Brookfield Property Group Australia Pty Ltd ACN 617 546 237 (Brookfield) and its affiliated entities, Reco Vault Pte Limited and Reco Oak Pte Limited (together GIC) and their affiliated entities.
ACN/ARSN (if applicable)	ACN 693 497 844, 642 379 235, 104 643 629, 617 546 237
There was a change in the interests of the substantial holder on	11 May 2026
The previous notice was given to the company on	9 December 2025
The previous notice was dated	9 December 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)
Fully Paid ordinary stapled securities, comprising one ordinary share in ASOL and one unit in ASPT (Stapled Securities)	135,996,567	10.35%	135,996,567	10.35%

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
11 May 2026	Bidder Company and Bidder Trustee	Pursuant to the implementation of a scheme of arrangement and trust scheme lodged with ASIC on 21 April 2026 (Schemes), the Bidder Company and Bidder Trustee acquired on 8 May 2026 all of the issued securities in National Storage Holdings Limited and National Storage Property Trust, and accordingly changed the nature of the relevant interest it held in the Stapled Securities as disclosed to ASX on 9 December 2025 (ASK Securities) to a relevant interest under section 608(3)(b) of the Corporations Act 2001 (Cth) (Corporations Act) by acquiring	N/A	135,996,567	10.35%

---

Docusign Envelope ID: 8B1026D2-6C63-4636-BF36-8CB1EB3BDD2C

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
Iridium III	Iridium III	Iridium III	Relevant interest per s608(1)(a) Corporations Act, as registered holder of the ASK Securities.	135,996,567	10.35%
Iridium Platform	Iridium III	Iridium III	Deemed relevant interest per s608(3)(b) Corporations Act, because Iridium Platform controls Iridium III.	135,996,567	10.35%
Brookfield and its affiliated entities	Iridium III	Iridium III	Brookfield, together with GIC, has power to influence decisions made by Iridium Platform and Iridium III and therefore has a relevant interest in the ASK Securities held by these entities in accordance with section 608(3)(b) of the Corporations Act. Affiliates of Brookfield are associated with it and are therefore also substantial holders.	135,996,567	10.35%
GIC and their affiliated entities	Iridium III	Iridium III	GIC, together with Brookfield, has power to influence decisions made by Iridium Platform and Iridium III and therefore has a relevant interest in the ASK Securities held by these entities in accordance with section 608(3)(b) of the Corporations Act. Affiliates of GIC are associated with it and are therefore also substantial holders.	135,996,567	10.35%

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	N/A

6. Addresses

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

Name	Address
Bidder Company and Bidder Trustee	Suite 2, Level 25, 100 Miller Street, North Sydney NSW 2060
Iridium III, Iridium Platform and their affiliates	Suite 2, Level 25, 100 Miller Street, North Sydney NSW 2060
Brookfield and its affiliates	Brookfield Place Sydney, 2-12 Carrington St, Sydney NSW 2000
GIC and their affiliates	168 Robinson Road, #37-01, Capital Tower, Singapore 068912

---

Docusign Envelope ID: 8B1026D2-6C63-4636-BF36-8CB1EB3BDD2C

Signature

print name	Aline Berge-Smietana	capacity	Director, Bidder Trustee
sign here		date	12 May 2026
print name	Andrew Catsoulis	capacity	Director, Bidder Company
sign here		date	12 May 2026
print name	Aline Berge-Smietana	capacity	Director, Iridium III
sign here		date	12 May 2026