Big Yellow Group PLC

Major Shareholding Notification • Oct 27, 2025

National Storage Mechanism | Additional information

RNS Number : 9456E

Big Yellow Group PLC

27 October 2025

FORM 8 (OPD)

PUBLIC OPENING POSITION DISCLOSURE BY A PARTY TO AN OFFER

Rules 8.1 and 8.2 of the Takeover Code (the "Code")

1.         KEY INFORMATION

(a) Full name of discloser:	Big Yellow Group PLC
(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	Big Yellow Group PLC
(d) Is the discloser the offeror or the offeree?	OFFEREE
(e) Date position held:      The latest practicable date prior to the disclosure	27 October 2025
(f)  In addition to the company in 1(c) above, is the discloser 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.         POSITIONS OF THE PARTY TO THE OFFER MAKING THE DISCLOSURE

If there are positions or rights to subscribe to disclose in more than one class of relevant securities of the offeror or offeree named in 1(c), copy table 2(a) or (b) (as appropriate) for each additional class of relevant security.

(a)        Interests and short positions in the relevant securities of the offeror or offeree to which the disclosure relates

Class of relevant security:	Ordinary shares of 10 pence
	Interests		Short positions
Number	%	Number	%
(1) Relevant securities owned and/or controlled:	NIL	-	NIL	-
(2) Cash-settled derivatives:	NIL	-	NIL	-
(3) Stock-settled derivatives (including options) and agreements to purchase/sell:	NIL	-	NIL	-
TOTAL:	NIL	-	NIL	-

All interests and all short positions should be disclosed.

Details of 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 (Open Positions).

Details of any securities borrowing and lending positions or financial collateral arrangements should be disclosed on a Supplemental Form 8 (SBL).

(b)        Rights to subscribe for new securities

Class of relevant security in relation to which subscription right exists:	N/A
Details, including nature of the rights concerned and relevant percentages:	N/A

3.         POSITIONS OF PERSONS ACTING IN CONCERT WITH THE PARTY TO THE OFFER MAKING THE DISCLOSURE

Details of any interests, short positions and rights to subscribe (including directors' and other employee options) of any person acting in concert with the party to the offer making the disclosure:

(a)  Interests in Big Yellow Group PLC held by the directors of Big Yellow Group PLC and their close relatives and related trusts

Name	No. of ordinary shares	Percentage of total issued share capital (excl. share options) (1)
Nicholas Vetch CBE	6,337,780	3.22%
James Gibson	1,848,060	0.94%
John Trotman	242,896	0.12%
Vince Niblett	3,000	0.00%
Michael O'Donnell	9,000	0.00%

(1) The total number of ordinary shares in issue as at the date of this document is 196,767,698 ordinary shares of 10 pence each with voting rights. Percentage holdings are rounded down to two decimal places.

(b)  Interests in Big Yellow Group PLC held as options or awards under the share plans of Big Yellow Group PLC by the directors of Big Yellow Group PLC and their close relatives and related trusts who are not exempt principal traders for the purposes of Rule 8 of the Code

Name	Share plan	No. of shares under options / awards	Date of grant	Vesting date	Lapse date	Exercise price per share (£)
Nicholas Vetch CBE	Big Yellow Group PLC Long Term Investment Plan ("LTIP")	35,099	5 August 2020	5 August 2023	4 August 2030	NIL
LTIP	27,617	22 July 2021	22 July 2024	21 July 2031	NIL
Big Yellow Group PLC Deferred Bonus Share Plan ("DBSP")	34,442	8 June 2022	8 June 2025	7 June 2032	NIL
LTIP	11,621	21 July 2022	21 July 2025	20 July 2032	NIL
Big Yellow Group PLC Savings Related Share Option Plan ("SAYE")	1,697	8 August 2022	8 August 2025	8 February 2026	£10.60
DBSP	41,216	20 July 2023	20 July 2026	19 July 2033	NIL
LTIP	78,243	20 July 2023	20 July 2026	19 July 2033	NIL
DBSP	23,658	21 May 2024	21 May 2027	20 May 2034	NIL
LTIP	70,944	18 July 2024	18 July 2027	17 July 2034	NIL
DBSP	28,632	27 May 2025	27 May 2028	26 May 2035	NIL
LTIP	95,501	1 August 2025	1 August 2028	31 July 2035	NIL
James Gibson	LTIP	41,183	5 August 2020	5 August 2023	4 August 2030	NIL
LTIP	32,404	22 July 2021	22 July 2024	21 July 2031	NIL
DBSP	40,412	8 June 2022	8 June 2025	7 June 2032	NIL
LTIP	13,635	21 July 2022	21 July 2025	20 July 2032	NIL
SAYE	848	8 August 2022	8 August 2025	8 February 2026	£10.60
DBSP	48,360	20 July 2023	20 July 2026	19 July 2033	NIL
LTIP	91,805	20 July 2023	20 July 2026	19 July 2033	NIL
DBSP	27,759	21 May 2024	21 May 2027	20 May 2034	NIL
LTIP	83,241	18 July 2024	18 July 2027	17 July 2034	NIL
DBSP	33,594	27 May 2025	27 May 2028	26 May 2035	NIL
LTIP	112,053	1 August 2025	1 August 2028	31 July 2035	NIL
John Trotman	DBSP	25,190	23 May 2019	23 May 2022	22 May 2029	NIL
DBSP	17,735	15 June 2020	15 June 2023	14 June 2030	NIL
LTIP	30,419	5 August 2020	5 August 2023	4 August 2030	NIL
DBSP	27,329	22 July 2021	22 July 2024	21 July 2031	NIL
LTIP	23,935	22 July 2021	22 July 2024	21 July 2031	NIL
DBSP	29,850	8 June 2022	8 June 2025	7 June 2032	NIL
LTIP	7,554	21 July 2022	21 July 2025	20 July 2032	NIL
DBSP	35,719	20 July 2023	20 July 2026	19 July 2033	NIL
LTIP	50,857	20 July 2023	20 July 2026	19 July 2033	NIL
DBSP	20,503	21 May 2024	21 May 2027	20 May 2034	NIL
SAYE	1,962	10 July 2024	1 September 2027	1 March 2028	£9.45
LTIP	46,113	18 July 2024	18 July 2027	17 July 2034	NIL
DBSP	24,814	27 May 2025	27 May 2028	26 May 2035	NIL
LTIP	62,077	1 August 2025	1 August 2028	31 July 2035	NIL
John Hunter	LTIP	44,337	18 July 2024	18 July 2027	17 July 2034	NIL
SAYE	2,289	9 July 2025	1 September 2028	1 March 2029	£8.02
LTIP	62,077	1 August 2025	1 August 2028	31 July 2035	NIL

(d)  Interests in Big Yellow Group PLC held by other concert parties of Big Yellow Group PLC

Name	No. of ordinary shares	Percentage of total issued share capital (excl. share options) (1)
The Penare Fund (2)	221,500	0.11%

(2) An open-ended investment company wholly owned by Byways Investments Ltd, itself a company in which Nicholas Vetch CBE holds a controlling interest.

Details of 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 (Open Positions).

Details of any securities borrowing and lending positions or financial collateral arrangements should be disclosed on a Supplemental Form 8 (SBL).

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 party to the offer making the disclosure or any person acting in concert with it: 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

Details of any agreement, arrangement or understanding, formal or informal, between the party to the offer making the disclosure, or any person acting in concert with it, and any other person relating to: (i)  the voting rights of any relevant securities under any option; or (ii) the voting rights or future acquisition or disposal of any relevant securities to which any derivative is referenced: If there are no such agreements, arrangements or understandings, state "none"
NONE

(c)        Attachments

Are any Supplemental Forms attached?

Supplemental Form 8 (Open Positions)	NO
Supplemental Form 8 (SBL)	NO

###### Date of disclosure:	27 October 2025
###### Contact name:	Shauna Beavis, Company Secretary
###### Telephone number:	01276 477811

Public disclosures under Rule 8 of the Code must be made to a Regulatory Information Service.

The Panel's Market Surveillance Unit is available for consultation in relation to the Code's disclosure requirements on +44 (0)20 7638 0129.

The Code can be viewed on the Panel's website at www.thetakeoverpanel.org.uk .

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