Company: BCS
Filing Date: 2025-08-04
Form Type: 424B2
Source: 0001193125-25-172249
Chunk: 7

Company: BARCLAYS PLC
Filing Date: 2025-08-04
Form: 424B2
Chunk 7
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 holder of notes. Investing in the notes involves risks. We encourage you to read and carefully consider this document in its entirety, in particular the risk factorsbeginning on page S-25of this prospectus supplement and the other information included and incorporated by reference in this prospectus supplement and the accompanying prospectus, for a discussion of the factors you should carefully consider before deciding to invest in the notes. Neither the U.S. Securities and Exchange Commission nor any U.S. state securities commission has approved or disapproved of the notes or determined that this prospectus supplement is truthful or complete. Any representation to the contrary is a criminal offense. The notes are not deposit liabilities of Barclays PLC and are not covered by the U.K. Financial Services Compensation Scheme or insured by the U.S. Federal Deposit Insurance Corporation, the Canada Deposit Insurance Corporation or any other governmental agency of the United States, the U.K., Canada or any other jurisdiction.

| Per 20   note          |     | Price to Public(1) | % |     | Underwriting 
 Compensation | % |     | Proceeds, before 
 expenses, to     
 Barclays PLC     | % |
|:-----------------------|:----|:-------------------|:--|:----|:-------------|:--|:----|:-----------------|:--|
| Total                  |     | $                  |   |     | $            |   |     | $                |   |
| Per 20   note          |     |                    | % |     |              | % |     |                  | % |
| Total                  |     | $                  |   |     | $            |   |     | $                |   |
| Per floating rate note |     |                    | % |     |              | % |     |                  | % |
| Total                  |     | $                  |   |     | $            |   |     | $                |   |

Note:

| (1) | Plus accrued interest, if any, from and including     , 2025 |

The underwriters expect to deliver the notes to purchasers in book-entry form only through
the facilities of The Depository Trust Company (“DTC”), on or about , 2025. Beneficial interests in the notes will be shown on, and transfers thereof will be effected only through, records maintained by DTC and
its participants, including Clearstream Banking S.A. (“Clearstream, Luxembourg”) and Euroclear Bank SA/N