Company: BCS
Filing Date: 2025-08-04
Form Type: 424B2
Source: 0001193125-25-172249
Chunk: 11

Company: BARCLAYS PLC
Filing Date: 2025-08-04
Form: 424B2
Chunk 11
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 on page 2 of the accompanying prospectus. In particular, we refer you to the 2024
Form 20-F for a discussion of our audited results of operations and financial condition as of, and for the year ended, December 31, 2024, and to our current reports on Form
6-K filed on April 30, 2025 (File No. 001-09246;
Film No. 25892259) and July 29, 2025 (File No. 001-09246;
Film No. 251158770), which are incorporated by reference into this prospectus supplement.

In addition to the documents listed in the
accompanying prospectus and the documents incorporated by reference since the date of the accompanying prospectus, we incorporate by reference in this prospectus supplement and the accompanying prospectus any future documents we may file with the
SEC under Section 13(a), 13(c), 14 or 15(d) of the Exchange Act from the date of this prospectus supplement until the offering contemplated in this prospectus supplement is completed. Reports on Form 6-K
we may furnish to the SEC after the date of this prospectus supplement (or portions thereof) are incorporated by reference in this prospectus supplement only to the extent that the report expressly states that it is (or such portions are)
incorporated by reference in this prospectus supplement.

We will provide to you, upon your written or oral request, without charge, a
copy of any or all of the documents referred to above or in the accompanying prospectus which we have incorporated in this prospectus supplement by reference. You should direct your requests to Barclays Treasury, Barclays PLC, 1 Churchill Place,
London E14 5HP, U.K. (telephone: +44-20-7116-1000).

S-3

CERTAIN DEFINITIONS For purposes of this prospectus supplement:

| • |     | “BBPLC” refers to Barclays Bank PLC (or any successor entity); |

| • |     | “BBUKPLC” refers to Barclays Bank UK PLC (or any successor entity); |

| • |     | “Capital Regulations” means, at any time, the laws, regulations, requirements, standards, guidelines                                                                                                                                           
 and policies relating to capital adequacy and/or minimum requirement for own funds and eligible liabilities and/or loss absorbing capacity for credit institutions of either (i) the PRA and/or (ii) any other national or European authority,