Great Portland Estates PLC

Major Shareholding Notification • Oct 30, 2025

National Storage Mechanism | Additional information

RNS Number : 5819F

Great Portland Estates PLC

30 October 2025

Great Portland Estates plc

Great Portland Estates plc announces that on 30 October 2025, it received the Notification of Major Holdings as set out below.

Darren Lennark

General Counsel & Company Secretary

Great Portland Estates plc

020 7647 3000

30 October 2025

TR-1: Standard form for notification of major holdings

1. Issuer Details

ISIN

GB00BF5H9P87

Issuer Name

GREAT PORTLAND ESTATES P L C

UK or Non-UK Issuer

UK

2. Reason for Notification

An acquisition or disposal of financial instruments

3. Details of person subject to the notification obligation

Name

JANUS HENDERSON GROUP PLC

City of registered office (if applicable)

St Helier

Country of registered office (if applicable)

Jersey

4. Details of the shareholder

Full name of shareholder(s) if different from the person(s) subject to the notification obligation, above

City of registered office (if applicable)

Country of registered office (if applicable)

5. Date on which the threshold was crossed or reached

28-Oct-2025

6. Date on which Issuer notified

30-Oct-2025

7. Total positions of person(s) subject to the notification obligation

	% of voting rights attached to shares (total of 8.A)	% of voting rights through financial instruments (total of 8.B 1 + 8.B 2)	Total of both in % (8.A + 8.B)	Total number of voting rights held in issuer
Resulting situation on the date on which threshold was crossed or reached	2.497288	2.519174	5.016462	20376299
Position of previous notification (if applicable)

8. Notified details of the resulting situation on the date on which the threshold was crossed or reached

8A. Voting rights attached to shares

Class/Type of shares ISIN code(if possible)	Number of direct voting rights (DTR5.1)	Number of indirect voting rights (DTR5.2.1)	% of direct voting rights (DTR5.1)	% of indirect voting rights (DTR5.2.1)
GB00BF5H9P87		10143701		2.497288
Sub Total 8.A	10143701		2.497288%

8B1. Financial Instruments according to (DTR5.3.1R.(1) (a))

Type of financial instrument	Expiration date	Exercise/conversion period	Number of voting rights that may be acquired if the instrument is exercised/converted	% of voting rights
Sub Total 8.B1

8B2. Financial Instruments with similar economic effect according to (DTR5.3.1R.(1) (b))

Type of financial instrument	Expiration date	Exercise/conversion period	Physical or cash settlement	Number of voting rights	% of voting rights
CFD			Cash	10232598	2.519174
Sub Total 8.B2				10232598	2.519174%

9. Information in relation to the person subject to the notification obligation

2. Full chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held starting with the ultimate controlling natural person or legal entities (please add additional rows as necessary)

Ultimate controlling person	Name of controlled undertaking	% of voting rights if it equals or is higher than the notifiable threshold	% of voting rights through financial instruments if it equals or is higher than the notifiable threshold	Total of both if it equals or is higher than the notifiable threshold
Janus Henderson Group plc	Janus Henderson UK (Holdings) Limited	2.497288	2.519174	5.016462%
Janus Henderson UK (Holdings) Limited	Janus Henderson Investors UK Limited	2.439566	2.517058	4.956623%
Janus Henderson Investors UK Limited		2.439566	2.517058	4.956623%
Janus Henderson Group Plc	Janus Henderson US (Holdings) Inc.	2.497288	2.519174	5.016462%
Janus Henderson US (Holdings) Inc.	Janus Henderson Investors US LLC	0.000000	0.002116	0.002116%
Janus Henderson Investors US LLC		0.000000	0.002116	0.002116%
Janus Henderson Group Plc	Janus Henderson Jersey (Holdings) Limited	2.497288	2.519174	5.016462%
Janus Henderson Jersey (Holdings) Limited	Janus Henderson Investors Jersey Ltd	0.057722	0.000000	0.057722%
Janus Henderson Investors Jersey Ltd		0.057722	0.000000	0.057722%

10. In case of proxy voting

Name of the proxy holder

The number and % of voting rights held

The date until which the voting rights will be held

11. Additional Information

12. Date of Completion

30-Oct-2025

13. Place Of Completion

201 Bishopsgate, London, EC2M 3AE

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