Director/PDMR Shareholding

LEI: 213800ZBKL9BHSL2K459

13 March 2026

OSB GROUP PLC
(the Company)

Notification of Transactions of Persons Discharging Managerial Responsibilities (PDMR)

The Company was notified that Helen Golding (a Person Closely Associated with a PDMR) sold 518,184 ordinary shares of £0.01 each in the Company, on 10, 11, 12 and 13 March 2026.

The following notification made under Article 19 of the UK Market Abuse Regulation ("UK MAR") relates to a transaction by a PDMR in the shares of the Company.

1. Details of the person discharging managerial responsibilities / person closely associated
Name of natural person	Helen Golding
2. Reason for the notification
a. Position/status	Spouse of Chief Executive Officer, Andy Golding
b. Initial notification/amendment	Initial Notification
3. Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor
a. Full name of the entity	OSB GROUP PLC
b. Legal Entity Identifier code	213800ZBKL9BHSL2K459
4. Details of the transaction(s):
a. Description of the financial instrument, type of instrument	Ordinary shares of £0.01 each
Identification code	GB00BLDRH360
b. Nature of Transaction	Sale of 518,184 shares via nominee account
c. Price(s) and Volume(s)	Price	Volume
	1. £5.81743	343,485
	2. £5.739517	74,699
	3. £5.694949	44,354
	4. £5.6616	55,646
d. Aggregated Information:	Aggregated volume 518,184 Aggregated price £2,994,578.08
e. Date of transaction	1. 10 March 2026 2. 11 March 2026 3. 12 March 2026 4. 13 March 2026
f. Place of transaction	London Stock Exchange, Main Market (XLON)

Enquiries:

Jess Petrie	t: 01634 848 944
Group Head of Governance
Investor relations
Alexander Holcroft Group Director of Investor Relations	t: 01634 838973
Brunswick
Robin Wrench / Simone Selzer	t: 020 7404 5959

Notes to Editors

About OSB GROUP PLCs

OSB began trading as a bank on 1 February 2011 and was admitted to the main market of the London Stock Exchange in June 2014 (OSB.L). OSB joined the FTSE 250 index in June 2015. On 4 October 2019, OSB acquired Charter Court Financial Services Group plc and its subsidiary businesses. On 30 November 2020, OSB GROUP PLC became the listed entity and holding company for the OSB Group. The Group provides specialist lending and retail savings and is authorised by the Prudential Regulation Authority, part of the Bank of England, and regulated by the Financial Conduct Authority and Prudential Regulation Authority. The Group reports under two segments, OneSavings Bank and Charter Court Financial Services.