<SEC-DOCUMENT>0001193125-25-152032.txt : 20250630
<SEC-HEADER>0001193125-25-152032.hdr.sgml : 20250630
<ACCEPTANCE-DATETIME>20250630082846
ACCESSION NUMBER:		0001193125-25-152032
CONFORMED SUBMISSION TYPE:	6-K/A
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20250630
FILED AS OF DATE:		20250630
DATE AS OF CHANGE:		20250630

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SK TELECOM CO LTD
		CENTRAL INDEX KEY:			0001015650
		STANDARD INDUSTRIAL CLASSIFICATION:	RADIO TELEPHONE COMMUNICATIONS [4812]
		ORGANIZATION NAME:           	06 Technology
		EIN:				999999999
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		6-K/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	333-04906
		FILM NUMBER:		251088833

	BUSINESS ADDRESS:	
		STREET 1:		11, EULJIRO2-GA
		STREET 2:		JUNG-GU
		CITY:			SEOUL KOREA
		STATE:			M5
		ZIP:			100-999
		BUSINESS PHONE:		82-2-6100-1639

	MAIL ADDRESS:	
		STREET 1:		11, EULJIRO2-GA
		STREET 2:		JUNG-GU
		CITY:			SEOUL
		STATE:			M5
		ZIP:			100-999

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	KOREA MOBILE TELECOMMUNICATIONS CORP
		DATE OF NAME CHANGE:	19960530
</SEC-HEADER>
<DOCUMENT>
<TYPE>6-K/A
<SEQUENCE>1
<FILENAME>d87324d6ka.htm
<DESCRIPTION>FORM 6-K/A
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<HTML><HEAD>
<TITLE>Form 6-K/A</TITLE>
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<Center><DIV STYLE="width:8.5in" align="left">
<DIV STYLE="line-height:1.0pt;margin-top:0pt;margin-bottom:0pt;border-bottom:1px solid #000000">&nbsp;
</DIV><DIV STYLE="line-height:3.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1px solid #000000">&nbsp;</DIV> <P STYLE="margin-top:4pt; margin-bottom:0pt; font-size:18pt; font-family:Times New Roman" ALIGN="center"><B>UNITED STATES </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:18pt; font-family:Times New Roman" ALIGN="center"><B>SECURITIES AND EXCHANGE COMMISSION </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman" ALIGN="center"><B>Washington, D.C. 20549 </B></P>
<P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center><DIV STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</DIV></center>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:18pt; font-family:Times New Roman" ALIGN="center"><B>Form <FONT STYLE="white-space:nowrap">6-K/A</FONT> </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:18pt; font-family:Times New Roman" ALIGN="center"><B>Amendment No. 1 </B></P>
<P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center><DIV STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</DIV></center>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman" ALIGN="center"><B>REPORT OF FOREIGN PRIVATE ISSUER </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman" ALIGN="center"><B>PURSUANT TO RULE <FONT STYLE="white-space:nowrap">13a-16</FONT> OR <FONT STYLE="white-space:nowrap">15d-16</FONT> OF </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman" ALIGN="center"><B>THE SECURITIES EXCHANGE ACT OF 1934 </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>FOR THE MONTH OF JUNE 2025 </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>Commission File Number: <FONT STYLE="white-space:nowrap">333-04906</FONT> </B></P>
<P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center><DIV STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</DIV></center>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:24pt; font-family:Times New Roman" ALIGN="center"><B>SK Telecom Co., Ltd. </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>(Translation of registrant&#146;s name into English) </B></P>
<P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center><DIV STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</DIV></center>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>65, Euljiro, <FONT STYLE="white-space:nowrap">Jung-gu</FONT> </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>Seoul 04539, Korea </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman" ALIGN="center"><B>(Address of principal executive office) </B></P>
<P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><center><DIV STYLE="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%">&nbsp;</DIV></center>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">Indicate by check mark whether the registrant files or will file annual reports under cover of
<FONT STYLE="white-space:nowrap">Form&nbsp;20-F</FONT> or <FONT STYLE="white-space:nowrap">Form&nbsp;40-F.</FONT> </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman" ALIGN="center"><FONT
STYLE="white-space:nowrap"><FONT STYLE="white-space:nowrap">Form&nbsp;20-F&#8194;&#9746;&#8195;&#8195;&#8195;&nbsp;Form&nbsp;40-F&#8194;&#9744;</FONT></FONT> </P>
<P STYLE="font-size:10pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><DIV STYLE="line-height:1.0pt;margin-top:0pt;margin-bottom:0pt;border-bottom:1px solid #000000">&nbsp;
</DIV><DIV STYLE="line-height:3.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1px solid #000000">&nbsp;</DIV>
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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>Explanatory Note </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">SK Telecom Co., Ltd. (the &#147;Company&#148;) is furnishing this Amendment No.&nbsp;1 (this &#147;Form
<FONT STYLE="white-space:nowrap">6-K/A&#148;)</FONT> to the Form <FONT STYLE="white-space:nowrap">6-K</FONT> furnished by the Company on June&nbsp;27, 2025 (the &#147;Form <FONT STYLE="white-space:nowrap">6-K&#148;)</FONT> solely to correct
typographical errors. Other than the correction of typographical errors, this Form <FONT STYLE="white-space:nowrap">6-K/A</FONT> does not, and does not purport to, amend, update or restate the information in the Form
<FONT STYLE="white-space:nowrap">6-K</FONT> in any way or reflect any events that have occurred after the Form <FONT STYLE="white-space:nowrap">6-K</FONT> was originally furnished. </P>
<P STYLE="margin-top:24pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>Matters Relating to Corporate Sustainability Report of SK Telcom Co., Ltd. (the &#147;Company&#148;) </B></P>
<P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" ALIGN="center">


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<TD VALIGN="top" STYLE="BORDER:1px solid #000000; padding-left:8pt">1. Title of the Report</TD>
<TD VALIGN="bottom" STYLE=" BORDER-LEFT:1px solid #000000; BORDER-TOP:1px solid #000000; BORDER-BOTTOM:1px solid #000000">&nbsp;&nbsp;</TD>
<TD VALIGN="top" STYLE="BORDER-TOP:1px solid #000000; BORDER-RIGHT:1px solid #000000; BORDER-BOTTOM:1px solid #000000; padding-right:2pt">&#147;SK Telecom Annual Report 2024&#148; (the &#147;Report&#148;)</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8" STYLE="BORDER-LEFT:1px solid #000000; BORDER-TOP:1px solid #000000; BORDER-RIGHT:1px solid #000000; padding-left:8pt">&nbsp;</TD>
<TD HEIGHT="8" COLSPAN="2" STYLE="BORDER-LEFT:1px solid #000000; BORDER-TOP:1px solid #000000; BORDER-RIGHT:1px solid #000000">&nbsp;</TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" STYLE="BORDER-LEFT:1px solid #000000; BORDER-RIGHT:1px solid #000000; BORDER-BOTTOM:1px solid #000000; padding-left:8pt">2. Certifying Institution</TD>
<TD VALIGN="bottom" STYLE=" BORDER-LEFT:1px solid #000000; BORDER-BOTTOM:1px solid #000000">&nbsp;&nbsp;</TD>
<TD VALIGN="top" STYLE="BORDER-RIGHT:1px solid #000000; BORDER-BOTTOM:1px solid #000000; padding-right:2pt">British Standards Institution</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8" STYLE="BORDER-LEFT:1px solid #000000; BORDER-TOP:1px solid #000000; BORDER-RIGHT:1px solid #000000; padding-left:8pt">&nbsp;</TD>
<TD HEIGHT="8" COLSPAN="2" STYLE="BORDER-LEFT:1px solid #000000; BORDER-TOP:1px solid #000000; BORDER-RIGHT:1px solid #000000">&nbsp;</TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" STYLE="BORDER-LEFT:1px solid #000000; BORDER-RIGHT:1px solid #000000; BORDER-BOTTOM:1px solid #000000; padding-left:8pt">3. Reporting Standards</TD>
<TD VALIGN="bottom" STYLE=" BORDER-LEFT:1px solid #000000; BORDER-BOTTOM:1px solid #000000">&nbsp;&nbsp;</TD>
<TD VALIGN="top" STYLE="BORDER-RIGHT:1px solid #000000; BORDER-BOTTOM:1px solid #000000; padding-right:2pt">The Report was prepared in accordance with the guiding principles of, and includes content as suggested by, the &#147;&lt;IR&gt;
Framework,&#148; a standard framework established by the International Integrated Reporting Council. The Report was also prepared in accordance with the comprehensive requirements of the &#147;GRI Standards,&#148; the global standard for
sustainability reporting established by the Global Reporting Initiative.</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8" STYLE="BORDER-LEFT:1px solid #000000; BORDER-TOP:1px solid #000000; BORDER-RIGHT:1px solid #000000; padding-left:8pt">&nbsp;</TD>
<TD HEIGHT="8" COLSPAN="2" STYLE="BORDER-LEFT:1px solid #000000; BORDER-TOP:1px solid #000000; BORDER-RIGHT:1px solid #000000">&nbsp;</TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" STYLE="BORDER-LEFT:1px solid #000000; BORDER-RIGHT:1px solid #000000; BORDER-BOTTOM:1px solid #000000; padding-left:8pt">4. Filing Location</TD>
<TD VALIGN="bottom" STYLE=" BORDER-LEFT:1px solid #000000; BORDER-BOTTOM:1px solid #000000">&nbsp;&nbsp;</TD>
<TD VALIGN="top" STYLE="BORDER-RIGHT:1px solid #000000; BORDER-BOTTOM:1px solid #000000; padding-right:2pt"> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">The Company&#146;s corporate website</P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">(<U>https://www.sktelecom.com/esg/lib/persist.do</U>)</P> <P STYLE="font-size:3pt; margin-top:0pt; margin-bottom:1pt">&nbsp;</P></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8" STYLE="BORDER-LEFT:1px solid #000000; BORDER-TOP:1px solid #000000; BORDER-RIGHT:1px solid #000000; padding-left:8pt">&nbsp;</TD>
<TD HEIGHT="8" COLSPAN="2" STYLE="BORDER-LEFT:1px solid #000000; BORDER-TOP:1px solid #000000; BORDER-RIGHT:1px solid #000000">&nbsp;</TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" STYLE="BORDER-LEFT:1px solid #000000; BORDER-RIGHT:1px solid #000000; BORDER-BOTTOM:1px solid #000000; padding-left:8pt">5. Details of the Report</TD>
<TD VALIGN="bottom" STYLE=" BORDER-LEFT:1px solid #000000; BORDER-BOTTOM:1px solid #000000">&nbsp;&nbsp;</TD>
<TD VALIGN="top" STYLE="BORDER-RIGHT:1px solid #000000; BORDER-BOTTOM:1px solid #000000; padding-right:2pt"> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">1. Summary</P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">The Report was prepared for the Company&#146;s investors and stakeholders and provides an overview of the Company&#146;s annual performance. The Report covers
not only the Company&#146;s financial performance records, but also comprehensive information (i.e., the Company&#146;s &#147;Value Creation Story&#148;) on its future prospects, <FONT STYLE="white-space:nowrap">non-financial</FONT> performance and
underlying value enhancement efforts. The Company&#146;s board of directors approved the Report in June 2025.</P> <P STYLE="font-size:6pt; margin-top:0pt; margin-bottom:0pt">&nbsp;</P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">2. Reporting Period</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">The reporting period of the Report is from
January&nbsp;1, 2024 to December&nbsp;31, 2024. The Report, however, may disclose certain qualitative information up to May 2025. The Report presents quantitative data as of and for the years ended December&nbsp;31, 2022, 2023 and 2024 in order to
facilitate year-over-year trend analysis.</P> <P STYLE="font-size:6pt; margin-top:0pt; margin-bottom:0pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">3. Scope of the Report</P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">The geographic boundary of the Report is limited to the Republic of Korea, which is the Company&#146;s principal place of business and where over 99% of its
revenue is generated. Unless otherwise indicated in the Report, the data and information presented in the Report generally exclude those of the Company&#146;s overseas branches, subsidiaries and investment companies. Financial data included in the
Report are presented on a consolidated basis in accordance with the Korean International Financial Reporting Standards <FONT STYLE="white-space:nowrap">(&#147;K-IFRS&#148;),</FONT> including <FONT STYLE="white-space:nowrap">K-IFRS</FONT>
No.&nbsp;16, which has been applied since 2019. <FONT STYLE="white-space:nowrap">Non-financial</FONT> data on environmental performance and fulfillment of corporate social responsibility are presented on a
<FONT STYLE="white-space:nowrap">non-consolidated</FONT> basis.</P> <P STYLE="font-size:6pt; margin-top:0pt; margin-bottom:0pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:1pt; font-size:10pt; font-family:Times New Roman">In case of any
changes in the previously reported data resulting from the <FONT STYLE="white-space:nowrap">spin-off</FONT> of certain of the Company&#146;s business operations conducted in November 2021, the instance of such changes are separately indicated in the
Report. Furthermore, where such changes may significantly affect the decisions of the Company&#146;s stakeholders in consideration of the Company&#146;s financial and operational control and business influence as well as the potential consequences
of such changes, relevant data are separately included where indicated.</P></TD></TR>
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<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" BORDER="0" STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" ALIGN="center">


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<TD VALIGN="bottom" STYLE="BORDER:1px solid #000000; padding-left:8pt">&nbsp;</TD>
<TD VALIGN="bottom" STYLE=" BORDER-LEFT:1px solid #000000; BORDER-TOP:1px solid #000000; BORDER-BOTTOM:1px solid #000000">&nbsp;&nbsp;</TD>
<TD VALIGN="bottom" STYLE="BORDER-TOP:1px solid #000000; BORDER-RIGHT:1px solid #000000; BORDER-BOTTOM:1px solid #000000; padding-right:2pt"> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">4. Table of
Contents</P> <P STYLE="font-size:6pt; margin-top:0pt; margin-bottom:0pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">DO THE GOOD AI</P>
<P STYLE="font-size:6pt; margin-top:0pt; margin-bottom:0pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">DO AI</P> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; margin-left:4.00em; text-indent:-2.00em; font-size:10pt; font-family:Times New Roman">-&#8195;&#8194;&#8202;Business Overview</P> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; margin-left:4.00em; text-indent:-2.00em; font-size:10pt; font-family:Times New Roman">-&#8195;&#8194;&#8202;ESG Overview</P> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; margin-left:4.00em; text-indent:-2.00em; font-size:10pt; font-family:Times New Roman">-&#8195;&#8194;&#8202;Special Report</P> <P STYLE="font-size:6pt; margin-top:0pt; margin-bottom:0pt">&nbsp;</P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; margin-left:1.00em; text-indent:-1.00em; font-size:10pt; font-family:Times New Roman">THE AI</P> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; margin-left:4.00em; text-indent:-2.00em; font-size:10pt; font-family:Times New Roman">-&#8195;&#8194;&#8202;Corporate Governance</P> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; margin-left:4.00em; text-indent:-2.00em; font-size:10pt; font-family:Times New Roman">-&#8195;&#8194;&#8202;Ethical Management</P> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; margin-left:4.00em; text-indent:-2.00em; font-size:10pt; font-family:Times New Roman">-&#8195;&#8194;&#8202;Compliance</P> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; margin-left:4.00em; text-indent:-2.00em; font-size:10pt; font-family:Times New Roman">-&#8195;&#8194;&#8202;AI Governance</P> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; margin-left:4.00em; text-indent:-2.00em; font-size:10pt; font-family:Times New Roman">-&#8195;&#8194;&#8202;Information Security</P> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; margin-left:4.00em; text-indent:-2.00em; font-size:10pt; font-family:Times New Roman">-&#8195;&#8194;&#8202;Risk Management</P> <P STYLE="font-size:6pt; margin-top:0pt; margin-bottom:0pt">&nbsp;</P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; margin-left:1.00em; text-indent:-1.00em; font-size:10pt; font-family:Times New Roman">GOOD AI</P> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; margin-left:4.00em; text-indent:-2.00em; font-size:10pt; font-family:Times New Roman">-&#8195;&#8194;&#8202;Environmental Management</P>
<P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; margin-left:4.00em; text-indent:-2.00em; font-size:10pt; font-family:Times New Roman">-&#8195;&#8194;&#8202;Climate Change Response</P>
<P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; margin-left:4.00em; text-indent:-2.00em; font-size:10pt; font-family:Times New Roman">-&#8195;&#8194;&#8202;Natural Capital</P>
<P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; margin-left:4.00em; text-indent:-2.00em; font-size:10pt; font-family:Times New Roman">-&#8195;&#8194;&#8202;Employees</P>
<P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; margin-left:4.00em; text-indent:-2.00em; font-size:10pt; font-family:Times New Roman">-&#8195;&#8194;&#8202;Occupational Safety and
Health</P> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; margin-left:4.00em; text-indent:-2.00em; font-size:10pt; font-family:Times New Roman">-&#8195;&#8194;&#8202;Human Rights
Management</P> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; margin-left:4.00em; text-indent:-2.00em; font-size:10pt; font-family:Times New Roman">-&#8195;&#8194;&#8202;Customer-Centric Management</P>
<P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; margin-left:4.00em; text-indent:-2.00em; font-size:10pt; font-family:Times New Roman">-&#8195;&#8194;&#8202;Supply Chain Management</P>
<P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; margin-left:4.00em; text-indent:-2.00em; font-size:10pt; font-family:Times New Roman">-&#8195;&#8194;&#8202;Local Community</P>
<P STYLE="font-size:6pt; margin-top:0pt; margin-bottom:0pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; margin-left:1.00em; text-indent:-1.00em; font-size:10pt; font-family:Times New Roman">APPENDIX</P>
<P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; margin-left:4.00em; text-indent:-2.00em; font-size:10pt; font-family:Times New Roman">-&#8195;&#8194;&#8202;Double Materiality
Assessment</P> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; margin-left:4.00em; text-indent:-2.00em; font-size:10pt; font-family:Times New Roman">-&#8195;&#8194;&#8202;Stakeholder
Engagement</P> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; margin-left:4.00em; text-indent:-2.00em; font-size:10pt; font-family:Times New Roman">-&#8195;&#8194;&#8202;Financial
Statements</P> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; margin-left:4.00em; text-indent:-2.00em; font-size:10pt; font-family:Times New Roman">-&#8195;&#8194;&#8202;Non-financial Statements</P>
<P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; margin-left:4.00em; text-indent:-2.00em; font-size:10pt; font-family:Times New Roman">-&#8195;&#8194;&#8202;Index</P>
<P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; margin-left:4.00em; text-indent:-2.00em; font-size:10pt; font-family:Times New Roman">-&#8195;&#8194;&#8202;Service Stability
Report</P> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:1pt; margin-left:4.00em; text-indent:-2.00em; font-size:10pt; font-family:Times New Roman">-&#8195;&#8194;&#8202;About This
Report</P></TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8" STYLE="BORDER-LEFT:1px solid #000000; BORDER-TOP:1px solid #000000; BORDER-RIGHT:1px solid #000000; padding-left:8pt">&nbsp;</TD>
<TD HEIGHT="8" COLSPAN="2" STYLE="BORDER-LEFT:1px solid #000000; BORDER-TOP:1px solid #000000; BORDER-RIGHT:1px solid #000000">&nbsp;</TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" STYLE="BORDER-LEFT:1px solid #000000; BORDER-RIGHT:1px solid #000000; BORDER-BOTTOM:1px solid #000000; padding-left:8pt">6. Submission Date</TD>
<TD VALIGN="bottom" STYLE=" BORDER-LEFT:1px solid #000000; BORDER-BOTTOM:1px solid #000000">&nbsp;&nbsp;</TD>
<TD VALIGN="top" STYLE="BORDER-RIGHT:1px solid #000000; BORDER-BOTTOM:1px solid #000000; padding-right:2pt">June 27, 2025</TD></TR>
<TR STYLE="font-size:1pt">
<TD HEIGHT="8" STYLE="BORDER-LEFT:1px solid #000000; BORDER-TOP:1px solid #000000; BORDER-RIGHT:1px solid #000000; padding-left:8pt">&nbsp;</TD>
<TD HEIGHT="8" COLSPAN="2" STYLE="BORDER-LEFT:1px solid #000000; BORDER-TOP:1px solid #000000; BORDER-RIGHT:1px solid #000000">&nbsp;</TD></TR>
<TR STYLE="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<TD VALIGN="top" STYLE="BORDER-LEFT:1px solid #000000; BORDER-RIGHT:1px solid #000000; BORDER-BOTTOM:1px solid #000000; padding-left:8pt">7. Other Important Matters Relating to an Investment Decision</TD>
<TD VALIGN="bottom" STYLE=" BORDER-LEFT:1px solid #000000; BORDER-BOTTOM:1px solid #000000">&nbsp;&nbsp;</TD>
<TD VALIGN="top" STYLE="BORDER-RIGHT:1px solid #000000; BORDER-BOTTOM:1px solid #000000; padding-right:2pt">The English version of the Report is expected to be posted on the Company&#146;s corporate website within July 2025.</TD></TR>
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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>SIGNATURES </B></P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">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. </P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P><DIV ALIGN="right">
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<TD VALIGN="top" COLSPAN="3"><B>SK T<SMALL>ELECOM</SMALL> C<SMALL>O</SMALL>., L<SMALL>TD</SMALL>. </B></TD></TR>
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<TD VALIGN="top" COLSPAN="3">(<I>Registrant</I>)</TD></TR>
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<TD VALIGN="top">By:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top"> <P STYLE="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">/s/ Hee Jun Chung</P></TD></TR>
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<TD VALIGN="top" COLSPAN="3">(<I>Signature</I>)</TD></TR>
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<TD VALIGN="top">Name:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top">Hee Jun Chung</TD></TR>
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<TD VALIGN="top">Title:</TD>
<TD VALIGN="bottom">&nbsp;</TD>
<TD VALIGN="top">Vice President</TD></TR>
</TABLE></DIV> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Date: June 30, 2025 </P>
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