TÜRK TELEKOMÜNİKASYON A.Ş.

Quarterly Report • Nov 4, 2025

TÜRK TELEKOMÜNİKASYON A.Ş. INTERIM ACTIVITY REPORT AS OF 30.09.2025

BASED ON NO:II-14.1 COMMUNIQUÉ OF CAPITAL MARKETS BOARD

November 4, 2025

CONTENTS

OVERVIEW OF TÜRK TELEKOM	2
CORPORATE STRUCTURE
SIGNIFICANT BOARD RESOLUTIONS
PERSONNEL MOVEMENTS
FINANCIAL RISK MANAGEMENT
MATERIAL ISSUES DURING THE PERIOD
MATERIAL ISSUES AFTER THE END OF THE PERIOD	13
SUMMARY FINANCIAL RESULTS	17

OVERVIEW OF TÜRK TELEKOM

Türk Telekom, with more than 180 years of history, is the first integrated telecommunications operator in Türkiye. In 2015, Company adopted a customer-oriented and integrated structure in order to respond to the rapidly changing communication and technology needs of customers in the most powerful and accurate way, while maintaining the legal entities of TT Mobil İletişim Hizmetleri A.Ş. and TTNET A.Ş. intact and adhering to the rules and regulations to which they are subject. Having a wide service network and product range in the fields of individual and corporate services, Türk Telekom unified its mobile, internet, phone and TV products and services under the single "Türk Telekom" brand as of January 2016.

"Türkiye's Multiplay Provider" Türk Telekom has 17.4 million fixed access lines, 15.5 million broadband, 2.8 million TV and 30.8 million mobile subscribers as of September 30, 2025. Türk Telekom Group Companies provide services in all 81 cities of Türkiye with 34,741 employees with the vision of introducing new technologies to Türkiye and accelerating Türkiye's transformation into an information society.

Türk Telekomünikasyon A.Ş., providing PSTN and wholesale broadband services, directly owns 100% of mobile operator TT Mobil İletişim Hizmetleri A.Ş., retail internet services, IPTV, satellite TV, Web TV, Mobile TV, Smart TV services provider TTNET A.Ş., convergence technologies company Argela Yazılım ve Bilişim Teknolojileri A.Ş., IT solution provider İnnova Bilişim Çözümleri A.Ş., online education software company SEBİT Eğitim ve Bilgi Teknolojileri A.Ş., call centre company AssisTT Rehberlik ve Müşteri Hizmetleri A.Ş., project development and corporate venture capital company TT Ventures Proje Geliştirme A.Ş, Electric Supply and Sales Company TTES Elektrik Tedarik Satış A.Ş., provider of combined facilities support activities TT Destek Hizmetleri A.Ş. with TT International Holding BV, wholesale data and capacity service provider TT International Telekomünikasyon Sanayi ve Ticaret Ltd.Şti., and financial technology company TTG Finansal Teknolojileri A.Ş. and indirectly owns Consumer Finance Company TT Finansman A.Ş, software programs retail and wholesale company TT Ventures Inc, subsidiaries of TT International Holding BV, TV Broadcasting and VOD services provider Net Ekran Companies, telecommunications devices sales company TT Satış ve Dağıtım Hizmetleri A.Ş. and payment and e-money services company TT Ödeme ve Elektronik Para Hizmetleri A.Ş., and web portal and computer programming company APPYAP Teknoloji ve Bilişim A.Ş.

CORPORATE STRUCTURE

Ownership Structure

Group	Shareholder	Paid-in Capital Amount (TL)	Share (%)
A	Türkiye Wealth Fund	1,925,000,000.00	55
B	Türkiye Wealth Fund	174,988,115.015	5
B	Republic of Türkiye Ministry of Treasury and Finance	875,011,884.975	25
C	Republic of Türkiye Ministry of Treasury and Finance	0.01
D	Free Float	525,000,000.00	15
Total		3,500,000,000.00	100

Note: Türkiye Wealth Fund has 1.68% share in free float.

The share transfer between LYY Telekomünikasyon A.Ş. (LYY) and Türkiye Wealth Fund (TWF), for the sale of Türk Telekomünikasyon A.Ş.'s (Türk Telekom) 55% stake owned by LYY to TWF is completed as of March 31, 2022. Accordingly, TWF has become the majority shareholder of Türk Telekom with a 61.68% stake.

The Türk Telekom Shareholders' Agreement and the Articles of Association further state that the Turkish Treasury owns a "golden share" (Class C share). The "golden share" is entitled to nominate a Board Member and has the below rights as per article 6 of the Articles of Association;

"In order to protect Türkiye's national interests relating to national security and the economy, the Class C share's positive vote is required for the following matters regardless of the voting result in the Board or General Assembly, otherwise accepted as null and void."

• a) Any proposed amendments to the Articles of Association;
• b) The transfer of any of the Company's registered shares which would result in a change in management control;
• c) The registration of any transfer of the Company's registered shares in the shareholder ledger.

Natural and legal persons owning over 5% of our Company shares, directly or indirectly are stated below:

Note 1: There are no natural or legal persons whose shareholding exceeds 5% except those shown in the shareholder structure.

Note 2: Türkiye Wealth Fund has 1.68% public share ownership.

Subsidiaries and financial investments:

For detailed information on subsidiaries, affiliates and financial investments, you can visit https://www.kap.org.tr/en/sirket-bilgileri/ozet/1473-turk-telekomunikasyon-a-s website.

Management and Organisation Structure

Board of Directors

Dr. İsmail İlhan Hatipoğlu Chairman of the Board of Directors and Member of the Board of Directors

Dr. Ömer Fatih Sayan Vice Chairman of the Board of Directors

Enver İskurt Independent Member of the Board of Directors

Selim Dursun Independent Member of the Board of Directors

Prof. Dr. İskender Pala Independent Member of the Board of Directors

Ümit Önal Member of the Board of Directors

Deniz Yılmaz Member of the Board of Directors

Dr. Yunus Arıncı Member of the Board of Directors

Mehmet Reşat Bahçeevli Member of the Board of Directors

Senior Management

Ebubekir Şahin CEO - General Manager

Ömer Karademir Finance Assistant General Manager

Dr. Ali Arıöz Support Services and Procurement Management Assistant General Manager

İskender Bayrak Human Resources Assistant General Manager

Mustafa Çavuşoğlu Head of Internal Audit

Osman Çolak Consumer Sales Assistant General Manager

Mustafa Eser Corporate Sales Assistant General Manager

Gökhan Evren IT Assistant General Manager

Ahmet Kamil Gençel Strategy and Wholesale Services Assistant General Manager

Tahsin Kaplan Legal and Regulation Assistant General Manager

Zafer Orhan Network Assistant General Manager

Zeynep Özden Marketing and Customer Experience Assistant General Manager

Serdar Toraman Head of Enterprise Risk

SIGNIFICANT BOARD RESOLUTIONS

Significant Board Resolutions taken during the period are presented under Material Issues During the Period section.

PERSONNEL MOVEMENTS

Consolidated headcount as of the 30.09.2025 and 31.12.2024 are 34,741 and 36,607 respectively.

FINANCIAL RISK MANAGEMENT

Türk Telekom can be exposed to financial risks such as liquidity risk, currency risk, interest rate risk, and counterparty risk.

Within the framework of the strategy to minimise the liquidity risk, long-term financial debt is obtained from different geographical regions (the Americas, Canada, Europe, the Gulf, Japan, China, and Türkiye) and from a diversified pool of creditors (commercial banks, international financial institutions, official export credit agencies, and bond markets).This strategy enables the Group to have access to long-term financing on competitive terms, without being dependent on a limited group of funding sources.

With regard to the Eurobonds issued by Türk Telekom, the Group actively monitors the price and return dynamics of these bonds, which are tradeable instruments in the secondary markets in order to ensure optimal cash management strategy on total return and cost basis.

The need to partially procure supplies in relation to capital expenditures from foreign vendors and the need for financing through long-term and diversified funding sources cause Türk Telekom to bear liabilities in foreign currency. Hence, excluding the hedge transactions, Türk Telekom has net liabilities in foreign currency and is exposed to FX risk due to the fluctuations in exchange rates, which may have an impact on the financial statements.

Türk Telekom aims to keep the impact of FX exposure on the financial statements to a minimum with its FX risk management transactions. In this respect, Türk Telekom has a total hedge position of USD 1,364¹ million equivalent, details of which are provided in the footnotes of its audited financial statements. The total hedge position including the cash in hard currency, which provides a natural hedge against FX exposure is USD 1,452 million equivalent.

With regards to its financial assets, Türk Telekom aims to minimise the counterparty risk in accordance with the established counterparty limits and diversification policy. Türk Telekom carries out its hedge transactions regarding financial risks within the framework of the guidance and authorisation set by the Board of Directors.

¹ Hedged amount includes hedging of FX financial debt, hedging of FX net trade payables and net investment hedge. Our short FX position was USD 412 million by year-end. Excluding the ineffective portion of the hedge portfolio, namely the PCCS contracts, foreign currency exposure was USD 449 million short FX position.

MATERIAL ISSUES DURING THE PERIOD

10 July 2025 Dated Regulatory Disclosure – About Company Establishment in the Turkish Republic of Northern Cyprus

The Board of Directors of our Company has decided on the establishment of a company in the Turkish Republic of Northern Cyprus ('TRNC') with a minimum capital of EUR 50.000 or equivalent in another currency in order to provide fixed telecommunications infrastructure services. Türk Telekomünikasyon A.Ş. and TTNET A.Ş. will respectively hold 99.99% and 0.01% of shares.

We aim to strengthen the digital backbone of the TRNC by carrying out a high-speed fibre internet transformation with the planned investment of approximately USD 100 million.

10 July 2025 Dated Regulatory Disclosure – About Company Establishment in the Turkish Republic of Northern Cyprus

The Board of Directors of our Company has decided on the establishment of a company in the Turkish Republic of Northern Cyprus ('TRNC') with a minimum capital of EUR 50.000 or equivalent in another currency in order to provide fixed telecommunications products and services in the retail market. TTNET A.Ş. and Türk Telekomünikasyon A.Ş. will respectively hold 99.99% and 0.01% of shares.

11 July 2025 Dated Regulatory Disclosure – Decease of Board Member

Mr. Yiğit Bulut, independent member of the Board of Directors of our Company, has passed away on 11.07.2025. As Turk Telekom family, we share our sincere condolences on his loss.

14 July 2025 Dated Regulatory Disclosure – About Establishment of Asset Leasing Company

The Board of Directors has decided that our Company establishes an asset leasing company, which will be wholly owned by Türk Telekomünikasyon A.Ş. and have a paid-in capital of at least TL 250,000. The company will operate within the framework of Article 31 of the Capital Markets Law No. 6362 and the Communiqué on Lease Certificates ("III-61.1"), published by the Capital Markets Board ("CMB") in the Official Gazette dated June 7, 2013, and numbered 28670.

15 July 2025 dated Regulatory Disclosure - 2025 2nd Quarter Financial Calendar

Our Company's financial reports for 01.04.2025 – 30.06.2025 accounting period will be disclosed to public on 13.08.2025.

25 July 2025 Dated Regulatory Disclosure – Appointment of Independent Board Member

Pursuant to Article 363 of the Turkish Commercial Code, Prof. Dr. İskender Pala, nominated by the Group B shareholder (Ministry of Treasury and Finance of the Republic of Türkiye), has been appointed for the vacant Independent Board Membership following the decease of Mr. Yiğit Bulut, to serve for the remaining term of his predecessor, in accordance with Article 363 of the Turkish Commercial Code.

The Capital Markets Board approved our application for the appointment of independent board member via its letter dated 24 July 2025. The appointment will be presented for approval at the first General Assembly Meeting of our Company.

Prof. Dr. İskender Pala

He was born in Uşak in 1958 and graduated from Istanbul University Faculty of Letters in 1979. He received his PhD in 1983, got his title of Associate Professor in 1993 and Professor in 1998 in the field of Divan literature. He worked at the Naval Forces Command between 1982 and 1996. He was a member of the editorial board of İSAM between 1996 and 2024. In 2004, he served as the Director of the Istanbul Metropolitan Municipality Culture Department. Between 2004 and 2010, he served as a cultural advisor to the Istanbul Metropolitan Municipality, between 2006 and 2012, he was a member of the City Theatres Repertoire Committee and the State Theatres Literary Committee, and between 2008 and 2010, he was a member of the Istanbul European Capital of Culture Management Board. He was a faculty member at Uşak University between 2009 and 2012, a member of the Atatürk Culture, Language and History Higher Council Management Board between 2013 and 2017, a senior advisor to the Prime Minister between 2015 and 2018, and an advisor to the Ministry of Culture between 2018 and 2019. He has been a faculty member at Istanbul Culture University since 1997 and continues to serve in this capacity. Since 2018, he has been the Deputy Chair of the Presidential Council for Culture and Arts Policies. Prof. Dr. İskender Pala is married and has three children.

29 July 2025 Dated Regulatory Disclosure – Board Resolution and CMB Application Regarding Bond Issue

In accordance with Clause 7 of Articles of Association of our Company and paragraph 3 of Clause 31 of Capital Markets Law, our Company's Board of Directors resolved that, upon completion of all the necessary procedures in line with the relevant legislation, in particular the legislation of the Capital Markets Board (CMB), one or more foreign currency and / or Turkish Lira denominated overseas debt capital market instruments up to a total amount of USD 1 Billion or its equivalent, including Green and Sustainable Debt Instruments, shall be issued without an offering to the public, on allocation basis and/or through a sale to qualified investors, within one year from the approval of the CMB. In accordance, the required application to the CMB has been submitted today.

4 August 2025 Dated Regulatory Disclosure – Fitch Ratings: Türk Telekomünikasyon A.Ş. Corporate Credit Rating Update

Fitch Ratings upgraded Türk Telekom's Long-Term Local Currency Issuer Default Rating (LTLC IDR) to "BB" from "BB-" while affirming its Long-Term Foreign Currency Issuer Default Rating (LTFC IDRs) at "BB-". The outlooks are "Stable".

13 August 2025 Dated Regulatory Disclosure – 2025 2nd Quarter Consolidated Financial and Operational Results

Türk Telekomünikasyon A.Ş.'s 2025 2nd Quarter consolidated financial and operational results earnings release is linked.

More detailed investor presentation will be available on our Company's Investor Relations website. https://www.kap.org.tr/en/Bildirim/1477891

13 August 2025 dated Regulatory Disclosure - Guidance Revision for 2025 Consolidated Financial Results

We are revisiting our 2025 guidance after both revenue growth and EBITDA margn exceeded our expectations in the first half of 2025.

We now expect to record c.10% revenue growth (ex-IFRIC 12) and c.41% EBITDA margın for FY2025 taking into account the high base in revenue growth in the second half, low seasonality in EBITDA margın in the final quarters and some deferred opex spending into the second half. Also, we now expect capex intensity ratio to be c.29% vs 28-29% before. While the change in our revenue and EBITDA margın guidance reflects better-than-expected performance both in revenue generation and cost management, the change in capex intensity ratio is driven by minor upward revisions to our year-end macroeconomic assumptions as well as upscaling of certain projects in mobile investments.

Our revised guidance for 2025 is as below:

• Consolidated revenue growth (excluding IFRIC 12): 10%

• EBITDA Margın: 41% - CAPEX Intensity: 29%

	Previous Guidance Revised Guidance
Consolidated Revenue Growth (exc. IFRIC 12)	8-9%	10%
EBITDA Margın	38-40%	41%
CAPEX intensity	28-29%	29%

Notes: 1) 2025 guidance expectations represent approximate values. 2) We assumed 29% inflation rate by the end of 2025. 3) Capex guidance excludes potential spending for the solar investments, 5G tender, concession renewal and license fees.

13 August 2025 dated Regulatory Disclosure - JCR Eurasia Rating Annual Review Announcement

JCR Eurasia Rating (JCR), concluded its annual review for Türk Telekomünikasyon A.Ş. and considered our Company in the investment grade category. JCR affirmed our Company's Long-Term National Issuer Credit Rating at "AAA (tr)" and the Short-Term National Issuer Credit Rating at "J1+ (tr)" with "Stable" outlooks.

JCR, affirmed our Company's Long Term International Foreign and Local Currency Issuer Credit Rating as "BB" with "Stable" outlook, in line with the international rating outlooks of the Republic of Türkiye.

15 August 2025 dated Regulatory Disclosure – Board Resolution Regarding the Issuance of Lease Certificate

In accordance with Clause 7 of Articles of Association of our Company and paragraph 3 of Clause 31 of Capital Markets Law, our Company's Board of Directors resolved that, upon completion of all the necessary procedures in line with the relevant legislation, in particular the legislation of the Capital Markets Board (CMB), one or more foreign currency and / or Turkish Lira denominated overseas debt capital market instruments structured as lease certificates (Sukuk) and up to a total amount of USD 1 Billion or its equivalent, shall be issued without an offering to the public, on allocation basis and/or through a sale to qualified investors, within one year from the approval of the CMB.

As stated in our announcement dated 14 July 2025, the planned lease certificate will be issued by the asset leasing company that is yet to be established.

26 August 2025 dated Regulatory Disclosure - About Establishment of Asset Leasing Company

As per our announcement dated 14.07.2025, TT Varlık Kiralama A.Ş., in which our Company Türk Telekomünikasyon A.Ş. has a 100% shareholding, has been established.

26 August 2025 dated Regulatory Disclosure - Regulation on Wholesale Tariffs of Türk Telekomünikasyon A.Ş.

Pursuant to decision no. 2025/DK-ETD/260 of the Information and Communications Technology Authority (ICTA), dated July 31, 2025, a regulation has been introduced as to the updating of Türk Telekomünikasyon A.Ş.'s wholesale prices aiming to ensure visibility and flexibility in the sector, and encourage new investments.

Accordingly, one-off and monthly fees for the regulated services offered by our Company at the wholesale level can be updated effective from January 1st and July 1st each year on cost basis.

When updating the tariffs, our Company may increase prices by no more than the ratio of the latest Domestic Producer Price Index (PPI) published by the Turkish Statistical Institute (TURKSTAT) to the Domestic PPI for April 2025.

Tariff updates should be publicly announced at least one month prior to their effective date. The socalled regulation will be effective in tariff updates to be enacted from July 1, 2026.

27 August 2025 dated Regulatory Disclosure - Extension of the Concession Agreement to Provide Electronic Communication Services

The existing concession agreement between Türk Telekomünikasyon A.Ş. (Türk Telekom) and the Information and Communication Technologies Authority (ICTA) for the provision of telecommunication services is set to expire on February 28, 2026.

The negotiations held between ICTA and our Company regarding the subject have concluded with the amendment and extension of the Concession Agreement to provide electronic communication services until February 28, 2050.

The Concession Agreement covers the provision, operation and development of fixed electronic communications infrastructure in Türkiye, the provision and marketing of all kinds of wholesale and/or retail telecom services over these infrastructures and networks, and in addition to these, the development and provision of cyber security services and digital products, the development of new infrastructures in line with technological developments and the provision of related telecom services and the likes.

According to the agreement, Türk Telekom will pay ICTA USD 2.5 billion + VAT (USD 3 billion including VAT) concession fee over a period of 10 years, starting in 2026.

The payment schedule for the concession fee is as follows:

• \$500 million each in 2026 and 2027
• \$200 million annually during the 2028-2034 period
• \$100 million in 2035

All payments are due on the last business day of the relevant year.

In addition, under the Concession Agreement, our Company commits implementing a US\$17 billion of investment plan through 2050 in alignment with our long-term strategic goals and financial stability. The investment plan encompasses not only fixed services investments but also innovative technology investments with high growth potential.

We strongly believe that the Agreement will strengthen our leadership in fixed infrastructure investments and fixed telecom services in Türkiye, and contribute significantly to our long-term value creation potential.

More detailed investor presentation will be available on www.ttinvestorrelations.com on August 28, 2025.

5 September 2025 Dated Regulatory Disclosure- Insurance Against Management Responsibilities

In accordance with article 4.2.8 of the annex to Corporate Governance Principles published by the Capital Markets Board of Türkiye, the Insurance "Policy Against Management Responsibilities" of our Company has been renewed at a total liability limit which corresponds to more than 25% of the paidin capital of our company.

24 September 2025 Dated Regulatory Disclosure- Regarding the Extension of the GSM (2G) Concession Agreement

Our group company, TT Mobil İletişim Hizmetleri A.Ş. (TT Mobil) has requested an extension to the GSM Concession Agreement signed with the Information and Communication Technologies Authority (BTK). In accordance with the 'Procedures and Principles Regarding the Determination of Conditions for the Extension of GSM Licence Agreements and GSM 1800 Licence Agreements', the BTK has notified our company of an extension fee of 67.2 million euros, excluding VAT.

The down payment of EUR 33.6 million and EUR 13.4 million VAT, has been paid today. The remaining amount will be paid in two equal instalments as 17.4 million Euro (on 24 September 2026 and 24 September 2027).

Accordingly, the GSM licence agreement will be extended until 30 April 2029, and TT Mobil will continue to use the 900 MHz and 1800 MHz frequency bands that had been allocated to the company.

24 September 2025 Dated Regulatory Disclosure - About Company Establishment in the Turkish Republic of Northern Cyprus

As per our announcement dated 10.07.2025, "Türk Telekom Kıbrıs Perakende Şirketi Limited", in which our Company Türk Telekomünikasyon A.Ş. and TTNET A.Ş. have shareholding 0.01% and 99.99% respectively has been incorporated.

24 September 2025 Dated Regulatory Disclosure - About Company Establishment in the Turkish Republic of Northern Cyprus

As per our announcement dated 10.07.2025, "Türk Telekom Kıbrıs Toptan Hizmetler Şirketi Limited", in which our Company Türk Telekomünikasyon A.Ş. and TTNET A.Ş. have shareholding 99.99% and 0.01% respectively has been incorporated.

25 September 2025 dated Regulatory Disclosure - Protocol Signed between the Government of the Republic of Türkiye and the Government of the Turkish Republic of Northern Cyprus

The Government of the Republic of Türkiye and the Government of the Turkish Republic of Northern Cyprus (TRNC) have signed a cooperation protocol for the development of the TRNC's fibre optic infrastructure and for the provision of services via fibre optic cables to households and enterprises. Our company has been tasked with implementing the investments covered by the protocol.

As part of the specified assignment, our company will be responsible for developing the TRNC's fibre optic infrastructure and providing services via fibre optic cables to households and enterprises.

Our group company incorporated in the TRNC, will be responsible for carrying out these investments.

25 September 2025 dated Regulatory Disclosure - Capital Markets Board's Approval of Debt Instrument Issuance

Pursuant to our disclosure dated July 29, 2025 the Capital Markets Board (CMB) has approved our application for the issuance of capital market instruments for up to a total amount of USD 1 Billion or equivalent in the form of Green/Sustainable Debt overseas on 07.08.2025. The approved issuance certificate is attached. In addition, the Sustainable Finance Framework approved by the Board of Directors of our Company and the Second Party Opinion (SPO) assessing the alignment of the Framework with the required international standards are also available in Investor Relations website. https://www.ttinvestorrelations.com/en-us/pages/home-page/

26 September 2025 Dated Regulatory Disclosure – Long Term Loan Agreement

Our company signed a long-term loan agreement with HSBC (Original Lender and Facility Agent) under the insurance coverage of Finnvera (the Finnish export credit agency) in order to finance our Group's investments, strategic initiatives and growth plans. The amount of the facility is USD 221,782,881.25, the final maturity is May 2036, and the average maturity 4.4 years. The total cost including the insurance premium and the other upfront costs is Term SOFR + 237 bps p.a.

30 September 2025 dated Regulatory Disclosure – Long Term Loan Agreement

Our company signed long-term two loan agreements with The Export-Import Bank of China (the "Original Lender") under the insurance coverage of Sinosure in order to finance our Group's investments, strategic initiatives, growth plans and Solar Power Plant investment in Sivas city, Zara district. The total amount of the facilities is EUR 119,795,741.97. The final maturity is Sep 2035, and the average maturity is 5.6 years. The interest rate is EURIBOR + 150 bps p.a. and the total cost including the insurance premium and the other upfront costs is EURIBOR + 258 bps p.a.

30 September 2025 dated Regulatory Disclosure - Ratings and Authorizations for Green Bond Issuance

Our Company plans to issue a Green Bond to be sold to qualified investors abroad, with a tenor of 7 years, within the current issuance limits approved by the Capital Markets Board of Türkiye. The issuance will be subject to 144A/RegS regulations. The final decision on the issuance, the amount of the issuance and certain terms and conditions will be determined according to the developments in financial markets. The Notes which are planned to be listed on the Euronext Dublin and to trade on the Global Exchange Market ('GEM') are expected to be rated "BB" by S&P Global Ratings and "BB-" by Fitch Ratings. ING, JP Morgan and MUFG have been mandated for the issuance.

30 September 2025 dated Regulatory Disclosure - Capital Markets Board's Approval of Debt Instrument Issuance

Pursuant to our disclosure dated August 15, 2025 the Capital Markets Board (CMB) has approved our group company TT Varlık Kiralama A.Ş.'s application for the issuance of capital market instruments for up to a total amount of USD 1 Billion or equivalent in the form of lease certificates (Sukuk) overseas on 25.09.2025. The approved issuance certificate is attached.

https://www.kap.org.tr/en/Bildirim/1494494

MATERIAL ISSUES AFTER THE END OF THE PERIOD

1 October 2025 dated Regulatory Disclosure - Overseas Green Bond Issuance – Pricing

The book building process of the proposed issuance of the Green Bond which is subject to 144A/RegS regulations and planned to be listed on the Euronext Dublin (Global Exchange Market) has been completed. The structure of the issuance is as follows: USD 600 million nominal, 7-year maturity with 7 October 2032 redemption date, 6.95% coupon rate, and 100% re-offer price. The transaction is expected to be completed after the subscription agreement is signed and the issuance approval is obtained from the CMB.

1 October 2025 dated Regulatory Disclosure – Long Term Loan Agreement

Our company signed a long-term loan agreement with Industrial and Commercial Bank of China (the "Original Lender" and the "Facility Agent") in order to finance our Group's investments, strategic initiatives and growth plans. The amount of the facility is 250 million USD, the final maturity is Sep 2030, and the average maturity is 4.9 years. The interest rate is TSOFR + %2.35 bps p.a. and the total cost including the upfront costs is TSOFR + 256 bps p.a.

03 October 2025 dated Regulatory Disclosure - Approval of the Tranche Issuance and Signing of Subscription Agreement

The tranche issuance approval for the Green Bond issuance which announced on 30.09.2025, has been obtained from the Capital Markets Board. The subscription agreement of the bond issuance was signed on 03.10.2025.

3 October 2025 dated Regulatory Disclosure - Participation in the ICTA Tender

Türk Telekom Group's subsidiary TT Mobil İletişim Hizmetleri A.Ş. has decided to participate in the "Tender" to be held on October 16, 2025, by the ICTA.

7 October 2025 dated Regulatory Disclosure – Completion of The Green Bond Issuance Process

The issuance process of the Green Bond with USD 600 million nominal value, 7-year maturity, October 7, 2032 redemption date, 100 re-offer price and 6.95% coupon rate abroad to qualified investors has been completed on 30.09.2025. The Notes are listed on the Euronext Dublin (Global Exchange Market). The proceeds have been transferred to our Company accounts.

10 October 2025 dated Regulatory Disclosure - Conclusion of the Related Party Transactions Report

The total amount of ongoing and recurring transfers of assets, services, and obligations between TTNET A.Ş. and Türk Telekomünikasyon A.Ş. (Turk Telekom) during the accounting period of January 1, 2024 – December 31, 2024 exceeded 10% of Türk Telekom's total revenue disclosed in its 2024 year-end financial statements, and this ratio is also expected to be exceeded in 2025. Considering the regulations and supervision of the Information and Communication Technologies Authority (ICTA) regarding tariffs, these transactions are deemed to have been conducted on fair, reasonable, and arm's length terms. No other related party transactions meeting this criterion were carried out with any other related parties, and no such transactions are planned for 2025.

Furthermore, pursuant to Article 9 of the Communiqué, there were no one-off related party transactions during the period that reached, or are expected to reach in the following period, 5% or more of the Company's total assets, total revenue, or company value calculated based on the adjusted daily weighted average market capitalization over the six-month period preceding the date of the Board of Directors' resolution, as disclosed in the Company's most recent annual financial statements announced publicly in accordance with the Capital Market Board's regulations.

16 October 2025 dated Regulatory Disclosure – Result of the ICTA Tender

In accordance with Türk Telekom Group's strategic plans, our subsidiary TT Mobil İletişim Hizmetleri A.Ş. (TT Mobil) has attended the tender held on October 16, 2025, by the ICTA and won the below packages;

• A3 package, 2x10 MHz bandwidth in 700 MHz frequency for USD 425 million
• B2 package, 1x80 MHz bandwidth in 3500 MHz frequency for USD 209 million
• B7 package, 1x20 MHz bandwidth in 3500 MHz frequency for USD 212 million,
• B8 package, 1x20 MHz bandwidth in 3500 MHz frequency for USD 248 million,

As a result of this tender TT Mobil,

• becomes the operator with the largest capacity per subscriber in the 3.5 GHz frequency, the most critical frequency for 5G holding the largest frequency in total,
• increases its share of total frequency band ownership in the market with a total bandwidth of 315 MHz.

Total spectrum fee is USD 1,094 million + VAT. The payments for spectrum fee (excluding VAT) will be made in three equal instalments on 02.01.2026, 25.12.2026 and 02.05.2027.

Separately, for the extension of existing authorisations (2G, 3G and 4.5G) which expire in 2029, starting from 2029 till 31.12.2042, operators shall pay 5 per cent. of their annual mobile gross sales (excluding VAT) for the year 2029 (between 30 April 2029 and 31 December 2029), and for the following years (until 2042).

The authorisation process will be completed once all legal requirements have been fulfilled in accordance with the relevant legislation.

20 October 2025 dated Regulatory Disclosure – Roadshow Plan, Ratings and Authorizations for Lease Certificates-Sukuk Issuance

Our group company TT Varlık Kiralama A.Ş., plans to issue a debt instrument (Lease Certificates-Sukuk) to be sold to qualified investors abroad, with a tenor of 5 years, within the current issuance limits approved by the Capital Markets Board of Türkiye. The issuance will be subject to 144A/RegS regulations. In this respect, Türk Telekom management will hold investor meetings arranged by the mandated banks, starting from October 20, 2025. The final decision on the issuance, the amount of the issuance and its terms and conditions will be determined according to the developments in financial markets following these meetings. The Notes which are planned to be listed on the Euronext Dublin and to trade on the Global Exchange Market ('GEM') are expected to be rated "BB" by S&P Global Ratings and "BB-" by Fitch Ratings. Dubai Islamic Bank, Emirates NBD, HSBC and Kuwait Finance House have been mandated for the issuance.

21 October 2025 Dated Regulatory Disclosure - Corporate Governance Compliance Rating Agreement Extension

Our company signed a one-year agreement with "SAHA Kurumsal Yönetim ve Kredi Derecelendirme Hizmetleri A.Ş." (SAHA) for the renewal of our "Rating for Compliance with Corporate Governance Principles" effective from 21.10.2025. SAHA is authorised to conduct corporate governance rating in Türkiye in compliance with Corporate Governance Principals of Turkish Capital Markets Board.

22 October 2025 dated Regulatory Disclosure - Overseas Lease Certificates-Sukuk Issuance – Pricing

The book building process of the proposed issuance of the Lease Certificates-Sukuk of our group company TT Varlık Kiralama A.Ş., which is subject to 144A/RegS regulations and planned to be listed on the Euronext Dublin (Global Exchange Market) has been completed. The structure of the issuance is as follows: USD 600 million nominal, 5-year maturity with 30 October 2030 redemption date, 6.50% coupon rate, and 100% re-offer price. The transaction is expected to be completed after the subscription agreement is signed and the tranche issuance approval is obtained from the CMB.

23 October 2025 dated Regulatory Disclosure - 2025 3rd Quarter Financial Calendar

Our Company's financial reports for 01.07.2025 – 30.09.2025 accounting period will be disclosed to public on 4.11.2025.

24 October 2025 dated Regulatory Disclosure - Announcement Regarding the Change in Management

Our company CEO Ümit Önal has been appointed the President of Cyber Security by the presidential decree dated October 24, 2025. While Ümit Önal's role as the CEO of Türk Telekom ends as of October 24, 2025, his membership in the Board of Directors continues.

We thank Ümit Önal for his valuable contributions to our company during his tenure. We wish him success in his new role.

24 October 2025 dated Regulatory Disclosure - Appointment of CEO – General Manager

Board of Directors has decided to appoint Mr. Ebubekir Şahin as the CEO of our Company effective as of 24 October 2025.

Ebubekir Şahin

He was born in 1974 in Çayeli, Rize. He completed his primary education in Rize and his high school education in Sakarya. He graduated from Faculty of Communication of Gazi University in 1995 and received his master's degree in Journalism in 2002.

He worked as a civil servant at the Ministry of Interior and Turkish Police Force. During the Refah-Yol governments, he served as an advisor to a Member of Parliament in the Grand National Assembly of Türkiye. As of the onset of 2002, during the first term of the AK Party, he served as Private Secretary to the Ministry of Justice, Private Secretary and Department Head to the Ministry of Industry and Trade, Advisor to the President of the Radio and Television Supreme Council, and Public Relations Advisor to the Prime Ministry. He then served as Head of the Administrative and Financial Affairs Department, Deputy General Manager, and Acting General Manager at Anadolu Agency between 2011 and 2014.

Between 2014 and 2017, he served as Deputy Undersecretary and Undersecretary of the Ministry of Family and Social Policies.

In accordance with Article 35 of RTÜK (Radio and Television Supreme Council) Law No. 6112, he was elected as a member of the Radio and Television Supreme Council from the AK Party quota following the election held by the Turkish Grand National Assembly on October 16, 2017. After serving for a period as a member, Şahin became the President of the Supreme Council with the election held on January 23, 2019. He was re-elected on October 18, 2023, and has served his fourth term as President of RTÜK. Ebubekir Şahin is married and has two children. He speaks English.

27 October 2025 dated Regulatory Disclosure - Signing of Subscription Agreement

The subscription agreement for the Lease Certificate-Sukuk issued on 22 October 2025 has been signed.

28 October 2025 dated Regulatory Disclosure - The Sales Process of the Lease Certificates-Sukuk Issuances Completed

The sale process of the Lease Certificates-Sukuk of our group company TT Varlık Kiralama A.Ş., with nominal amount of USD 600 million, 5-year maturity, the redemption date of 30 October 2030, reoffer price of 100 and coupon rate of 6.50% to qualified investors abroad has been completed on 28.10.2025. The Notes are listed on the Euronext Dublin (Global Exchange Market). The proceeds have been transferred to our Company's accounts.

The tranche issuance approval for the Lease Certificates-Sukuk, has been obtained from the Capital Markets Board today.

30 October 2025 dated Regulatory Disclosure - 2024 TSRS Compliant Sustainability Report

The 2024 TSRS-Compliant Sustainability Report of Türk Telekomünikasyon A.Ş., prepared in accordance with the Türkiye Sustainability Reporting Standards (TSRS), pursuant to the regulations of the Public Oversight, Accounting and Auditing Standards Authority of Türkiye. The mandatory sustainability assurance audit of the report was conducted by Güney Bağımsız Denetim ve Serbest Muhasebeci Mali Müşavirlik A.Ş. (E&Y) and disclosed to the public on our corporate website (https://www.ttinvestorrelations.com/).

SUMMARY FINANCIAL RESULTS

Consolidated Summary P&L Statement

(TL mn)	Q3'24	Q3'25	YoY Change
Revenue	53,788	59,522	10.7%
Revenue (Exc. IFRIC 12)	50,513	55,067	9.0%
EBITDA	21,952	26,703	21.6%
Margin	40.8%	44.9%
Depreciation and Amortisation	(11,155)	(10,925)	(2.1)%
Operating Profit	10,797	15,778	46.1%
Margin	20.1%	26.5%
Financial Income / (Expense)	(8,346)	(5,933)	(28.9)%
FX & Hedging Gain / (Loss)	(4,906)	(4,225)	(13.9)%
Interest Income / (Expense)	(2,743)	(949)	(65.4)%
Other Financial Income / (Expense)	(697)	(760)	8.9%
Monetary Gain / (Loss)	5,260	3,928	(25.3)%
Tax Income / (Expense)	(3,735)	(3,531)	(5.5)%
Net Income	3,976	10,243	157.6%
Margin	7.4%	17.2%
CAPEX*	12,974	17,874	37.8%

^* Excluding license fees and solar investments. Total capex including license fees and solar investments was TL 21.7 billion in Q3'25.

Consolidated Summary Balance Sheet

(TL mn)	31.12.2024	30.09.2025
Total Assets	338.982	346.664
Cash and Cash Equivalents	9.448	14.525
Tangible Assets(a)	142.689	153.973
Intangible Assets	105.603	112.510
Right of Use Assets	11.102	11.073
Other Assets(b)	70.141	54.583
Total Equities and Liabilities	338.982	346.664
Share Capital	96.416	96.416
Reserves, Retained Earnings and Other Equity Items	86.826	106.273
Interest Bearing Liabilities(c)	88.462	71.426
Bank Borrowings and Bonds	83.246	65.883
Lease Liabilities	5.217	5.542
Other Liabilities(d)	67.278	72.549

⁽a) Tangible assets include property, building or plant and equipment and investment property

⁽b) Major items within other assets are trade receivables, due from related parties, inventories, deferred tax asset and other current assets

⁽c) Includes short-term and long-term borrowings and lease obligations

⁽d) Major items within other liabilities are deferred tax liability, trade payables, provisions, income tax payable, due to related parties, other current liabilities, provisions for employee termination benefits and minority put option liability

Subscriber Performance

(mn, EoP)	Q3'24	Q3'25	YoY Change
Total Access Linesa	17.4	17.4	0.2%
Fixed Voice Subscribers	7.7	7.1	(8.9)%
Naked Broadband Subscribers	9.6	10.4	7.6%
Total Broadband Subscribers	15.3	15.5	1.2%
Total Fibre Subscribers	13.4	14.2	6.0%
FTTH/B	4.9	6.3	27.4%
FTTC	8.5	7.9	(6.5)%
b Total TV Subscribers	3.2	2.8	(10.8)%
Tivibu Home (IPTV + DTH) Subscribers	1.5	1.6	5.3%
Mobile Total Subscribers	27.0	30.8	14.1%
Mobile Postpaid Subscribers	20.0	24.0	20.1%
Mobile Prepaid Subscribers	7.0	6.8	(2.7)%

⁽a) Includes PSTN and WLR lines

ARPU Performance

TL	Q3'24	Q3'25	YoY Change
Fixed Voice ARPU	90.8	98.7	8.7%
Broadband ARPU	349.3	393.5	12.6%
Home TV ARPU	99.5	113.1	13.6%
Mobile Blended ARPU	262.3	267.5	2.0%
Mobile Blended ARPU (excluding m2m)	286.0	308.5	7.8%
Mobile Postpaid ARPU	284.0	291.9	2.8%
Mobile Postpaid ARPU (excluding m2m)	320.0	352.4	10.1%
Mobile Prepaid ARPU	179.5	161.8	(9.8)%

⁽b) Includes IPTV, DTH and Tivibu GO subscribers