# The Capital Buffers and Macro-prudential Measures Regulations 2025, Regulation 15: Duty of PRA to identify O-SIIs


(1) The PRA must identify O-SIIs in accordance with this regulation.
(2) An O-SII must be—
(a) a person with permission to carry on a regulated activity under Part 4A (permission to carry on regulated activities) of FSMA 2000, or
(b) a person established in the United Kingdom.
(3) An O-SII must also be—
(a) part of a group, the parent undertaking of which is—
(i) a UK parent institution,
(ii) a UK parent financial holding company, or
(iii) a UK parent mixed financial holding company, or
(b) an institution.
(4) In this regulation, “group” has the meaning given in section 421 (group) of FSMA 2000.

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Source: https://www.legislation.gov.uk/uksi/2025/653/regulation/15 (the official version)
Page: https://openlegislation.uk/capital-buffers-and-macro-prudential-measures-regulations-2025/regulation-15
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.