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<font style="font-weight: bold; font-family: Times New Roman; font-size: 13px">
FORM 6-K</font></div>
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SECURITIES AND EXCHANGE COMMISSION</font></div>
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<font style="font-weight: bold; font-family: Times New Roman; font-size: 13px">
Washington, D.C. 20549</font></div>
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<font style="font-weight: bold; font-family: Times New Roman; font-size: 13px">
Report of Foreign Private Issuer</font></div>
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Pursuant to Rule 13a - 16 or 15d - 16 of</font></div>
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<font style="font-weight: bold; font-family: Times New Roman; font-size: 13px">
the Securities Exchange Act of 1934</font></div>
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<font style="font-family: Times New Roman; font-size: 13px">For the
month of September</font></div>
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<font style="font-weight: bold; font-family: Times New Roman; font-size: 13px">
HSBC Holdings plc</font></div>
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<font style="font-family: Times New Roman; font-size: 13px">42nd
Floor, 8 Canada Square, London E14 5HQ, England</font></div>
<div><font style="font-family: Times New Roman; font-size: 10"> </font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">(Indicate
by check mark whether the registrant files or will file annual
reports under<font style="font-family: Times New Roman"> </font>Transaction in Own
Shares cover of Form 20-F or Form 40-F).</font></div>
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<font style="font-family: Times New Roman; font-size: 13px">Form
20-F X Form 40-F  </font></div>
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<font style="font-family: Times New Roman; font-size: 13px"> </font></div>
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<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 16px">
HSBC HOLDINGS PLC</font></div>
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<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
15 September 2025</font></div>
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<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
Transaction in own shares</font></div>
<div><font style="font-family: Times New Roman; font-size: 10"> </font></div>
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<font style="font-family: Times New Roman; font-size: 13px"><font style="color: #000000">
HSBC Holdings plc ("</font><font style="font-weight: bold; color: #000000">HSBC</font><font style="color: #000000">" or the "</font><font style="font-weight: bold; color: #000000">Company</font><font style="color: #000000">") announces that it has purchased for
cancellation the following number of its ordinary shares of US$0.50
from Merrill Lynch International ("</font><font style="font-weight: bold; color: #000000">Merrill
Lynch"</font><font style="color: #000000">) as part of its
buy-back announced on 31 July 2025.</font></font></div>
<div><font style="font-family: Times New Roman; font-size: 10"> </font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="text-decoration: underline; color: #000000; font-family: Times New Roman; font-size: 13px">
UK Venues</font></div>
<div><font style="font-family: Times New Roman; font-size: 10"> </font></div>
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<table cellpadding="0" cellspacing="0" style="text-align: left; width: 80%; font-family: Times New Roman; font-size: 13px; margin: 0px auto 0px 0px;">
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<td style="vertical-align: top; width: 25%;">
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">Date of
purchase:</font></div>
</td>
<td style="vertical-align: top; width: 75%;">
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">15
September 2025</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 25%;">
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">Number
of ordinary shares of US$0.50 each purchased:</font></div>
</td>
<td style="vertical-align: top; width: 75%;">
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">2,185,492</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 25%;">
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">Highest
price paid per share:</font></div>
</td>
<td style="vertical-align: top; width: 75%;">
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">10.1400</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 25%;">
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">Lowest
price paid per share:</font></div>
</td>
<td style="vertical-align: top; width: 75%;">
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">10.0840</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 25%;">
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">Volume
weighted average price paid per share:</font></div>
</td>
<td style="vertical-align: top; width: 75%;">
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">10.1112</font></div>
</td>
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</div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
 </font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px"><font style="color: #000000">
All repurchases on the London Stock Exchange, Aquis Exchange, Cboe
Europe Limited (through the BXE and CXE order books) and/or
Turquoise ("</font><font style="font-weight: bold; color: #000000">UK Venues</font><font style="color: #000000">") are implemented as "on Exchange" transactions
(as such term is defined in the rules of the London Stock Exchange)
and as "market purchases" for the purposes of the Companies Act
2006.</font></font></div>
<div><font style="font-family: Times New Roman; font-size: 10"> </font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="text-decoration: underline; color: #000000; font-family: Times New Roman; font-size: 13px">
Hong Kong Stock Exchange</font></div>
<div><font style="font-family: Times New Roman; font-size: 10"> </font></div>
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<table cellpadding="0" cellspacing="0" style="text-align: left; width: 80%; font-family: Times New Roman; font-size: 13px; margin: 0px auto 0px 0px;">
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<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">Date of
purchase:</font></div>
</td>
<td style="vertical-align: top; width: 75%;">
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">15
September 2025</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 25%;">
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">Number
of ordinary shares of US$0.50 each purchased:</font></div>
</td>
<td style="vertical-align: top; width: 75%;">
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">1,473,200</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 25%;">
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">Highest
price paid per share:</font></div>
</td>
<td style="vertical-align: top; width: 75%;">
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">106.7000</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 25%;">
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">Lowest
price paid per share:</font></div>
</td>
<td style="vertical-align: top; width: 75%;">
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">105.6000</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 25%;">
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">Volume
weighted average price paid per share:</font></div>
</td>
<td style="vertical-align: top; width: 75%;">
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">106.3980</font></div>
</td>
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</div>
<div><font style="font-family: Times New Roman; font-size: 10"> </font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px"><font style="color: #000000">
All repurchases on The Stock Exchange of Hong Kong Limited
("</font><font style="font-weight: bold; color: #000000">Hong Kong
Stock Exchange</font><font style="color: #000000">") are "off
market" for the purposes of the Companies Act 2006 but are
transactions which occur "on Exchange" for the purposes of the
Rules Governing the Listing of Securities on The Stock Exchange of
Hong Kong Limited and which constitute an "on-market share
buy-back" for the purposes of the Codes on Takeovers and Mergers
and Share Buy-backs.</font></font></div>
<div><font style="font-family: Times New Roman; font-size: 10"> </font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Since the commencement of the buy-back announced on 31 July 2025,
the Company has repurchased 119,993,923 ordinary shares for a total
consideration of approximately US$1,539.3m.</font></div>
<div><font style="font-family: Times New Roman; font-size: 10"> </font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Following the cancellation of the shares repurchased on the UK
Venues, the Company's issued ordinary share capital will consist
of 17,292,578,949 ordinary shares with voting rights.
There are no ordinary shares held in treasury. Cancellation of the
shares repurchased on the Hong Kong Stock Exchange takes longer
than those repurchased on the UK Venues and a further announcement
of total voting rights will be made once those shares have been
cancelled.</font></div>
<div><font style="font-family: Times New Roman; font-size: 10"> </font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
The above figure of 17,292,578,949 may be used by shareholders
as the denominator for the calculations by which they will
determine if they are required to notify their interest in, or a
change to their interest in, the Company under the Financial
Conduct Authority's Disclosure Guidance and Transparency
Rules.</font></div>
<div><font style="font-family: Times New Roman; font-size: 10"> </font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
In accordance with Article 5(1)(b) of the Market Abuse Regulation
(EU) No 596/2014 (as it forms part of domestic law of the United
Kingdom by virtue of the European Union (Withdrawal) Act 2018, as
amended), a full breakdown of the individual trades made by Merrill
Lynch on behalf of the Company is available via the link
below.</font></div>
<div><font style="font-family: Times New Roman; font-size: 10"> </font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="text-decoration: underline; color: #0000FF; font-family: Times New Roman; font-size: 13px">
http://www.rns-pdf.londonstockexchange.com/rns/4072Z_1-2025-9-15.pdf</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px"><font style="color: #000000">
This announcement will also be available on HSBC's website
at </font><font style="text-decoration: underline; color: #0000FF">www.hsbc.com/sea</font></font></div>
<div><font style="font-family: Times New Roman; font-size: 10"> </font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Enquiries to:</font></div>
<div><font style="font-family: Times New Roman; font-size: 10"> </font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
                                                                                                                   </font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Lee Davis</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Group Governance</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
shareholderquestions@hsbc.com</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
+44 (0)20 7991 8888</font></div>
<div><font style="font-family: Times New Roman; font-size: 10"> </font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; font-family: Times New Roman; font-size: 13px">
</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px;"> </font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; font-family: Times New Roman; font-size: 13px">
SIGNATURE</font></div>
<div><font style="font-family: Times New Roman; font-size: 10"> </font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">Pursuant
to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf
by the undersigned, thereunto duly authorized.</font></div>
<div><font style="font-family: Times New Roman; font-size: 10"> </font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px"> </font></div>
<div><font style="font-family: Times New Roman; font-size: 10"> </font></div>
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<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">HSBC
Holdings plc</font></div>
</td>
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<td style="vertical-align: top; width: 49%">
<div><font style="font-family: Times New Roman; font-size: 13px"> </font></div>
</td>
<td style="vertical-align: top; width: 51%">
<div><font style="font-family: Times New Roman; font-size: 13px"> </font></div>
</td>
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<td style="vertical-align: top; width: 49%">
<div><font style="font-family: Times New Roman; font-size: 13px"> </font></div>
</td>
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<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">By:</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 49%">
<div><font style="font-family: Times New Roman; font-size: 13px"> </font></div>
</td>
<td style="vertical-align: top; width: 51%">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">Name:
Aileen Taylor</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 49%">
<div><font style="font-family: Times New Roman; font-size: 13px"> </font></div>
</td>
<td style="vertical-align: top; width: 51%">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">Title:
Group Company Secretary and Chief Governance Officer</font></div>
</td>
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<td style="vertical-align: top; width: 49%">
<div><font style="font-family: Times New Roman; font-size: 13px"> </font></div>
</td>
<td style="vertical-align: top; width: 51%">
<div><font style="font-family: Times New Roman; font-size: 13px"> </font></div>
</td>
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<td style="vertical-align: top; width: 49%">
<div><font style="font-family: Times New Roman; font-size: 13px"> </font></div>
</td>
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<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">Date:
15 September 2025</font></div>
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