T-Mobile US, Inc. - Amendment to Schedule 13D Filing

This filing is an amendment (Amendment No. 35) to the Schedule 13D initially filed on May 10, 2013, by Deutsche Telekom AG and its subsidiaries (collectively, the "Reporting Persons") regarding their ownership of T-Mobile US, Inc. common stock. The amendment primarily concerns transactions occurring on March 19, 2026. Key events include the novation of the SB-DT 2029 Call Option Agreement, where Project 9 transferred its rights and obligations to Signal Bright. Signal Bright also entered into a forward sale contract with an unaffiliated dealer, pledging shares of T-Mobile US, Inc. common stock as collateral. Deutsche Telekom retains the right to direct the vote of these pledged shares and has a right of first refusal in certain events. As of the filing date, the Reporting Persons collectively beneficially own 592,065,875 shares of common stock, representing 53.7% of the outstanding shares, with Deutsche Telekom AG holding the majority of these shares directly or indirectly.