Company: HBCYF
Filing Date: 2025-10-29
Form Type: 6-K
Source: 0001654954-25-012315
Chunk: 0

Company: HSBC HOLDINGS PLC
Filing Date: 2025-10-29
Form: 6-K
Chunk 0
---
#### FORM 6-K

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

#### Report of Foreign Private Issuer

#### Pursuant to Rule 13a - 16 or 15d - 16 of

#### the Securities Exchange Act of 1934
<div align='center'>For the month of October</div>

#### HSBC Holdings plc
<div align='center'>42nd Floor, 8 Canada Square, London E14 5HQ, England

(Indicate by check mark whether the registrant files or will file annual reports undercover of Form 20-F or Form 40-F).

Form 20-F X Form 40-F</div>

29 October 2025

### HSBC HOLDINGS PLC

### PUBLICATION OF BASE PROSPECTUS SUPPLEMENT
**The following base prospectus supplement has been approved by the Financial Conduct Authority and is available for viewing:

Base Prospectus Supplement dated 29 October 2025 to the Base Prospectus dated 28 March 2025 and the supplements thereto dated 30 April 2025 and 31 July 2025.

To view the full document, please paste the following URL into the address bar of your browser:

http://www.hsbc.com/investors/fixed-income-investors/issuance-programmes

A copy of the above document has been submitted to the National Storage Mechanism and will shortly be available for inspection at:

https://data.fca.org.uk/#/nsm/nationalstoragemechanism

Investor enquiries to:

Greg Case +44 (0) 20 7992 3825 investorrelations@hsbc.com

Media enquiries to:

Press Office +44 (0) 20 7991 8096 pressoffice@hsbc.com

Note to editors:**

#### HSBC Holdings plc
HSBC Holdings plc, the parent company of HSBC, is headquartered in London. HSBC serves customers worldwide from offices in 57 countries and territories. With assets of US$3,234bn at 30 September 2025, HSBC is one of the world's largest banking and financial services organisations.

#### DISCLAIMER - INTENDED ADDRESSEES
IMPORTANT : You must read the following before continuing: The following applies to the Base Prospectus Supplement available by clicking on the link above, and you are therefore advised to read this carefully before reading, accessing or making any other use of the Base Prospectus Supplement. In accessing the