Sec Form 4 Filing - CANO NESTOR @ T-Mobile US, Inc. - 2025-02-14

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person CANO NESTOR 2. Issuer Name and Ticker or Trading Symbol T-Mobile US, Inc. [ TMUS] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) EVP, Transformation and CIDO (Last) (First) (Middle) C/O T-MOBILE US, INC, 12920 SE 38TH STREET 3. Date of Earliest Transaction (MM/DD/YY) 02/14/2025 (Street) BELLEVUE, WA98006 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 02/14/2025 S 3,294 D $ 269.11 ( 1 ) 86,883.162 ( 2 ) D Common Stock 02/14/2025 S 11,706 D $ 269.11 ( 1 ) 70,972 ( 3 ) I The Nestor Cano Family Trust Common Stock 02/15/2025 A 9,976 ( 4 ) A $ 0 96,859.162 D Common Stock 02/15/2025 F 3,140.896 ( 5 ) D $ 270.82 93,718.266 D Common Stock 02/15/2025 A 8,876 ( 6 ) A $ 0 102,594.266 D Common Stock 02/15/2025 F 3,544.187 ( 7 ) D $ 270.82 99,050.079 D Common Stock 4,400 I PMDD Foundation

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other CANO NESTOR C/O T-MOBILE US, INC 12920 SE 38TH STREET BELLEVUE, WA98006 EVP, Transformation and CIDO Signatures /s/ Frederick Williams, Attorney-in-Fact 02/19/2025 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $268.51 to $269.38. The reporting person undertakes toprovide the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission upon request, full information regarding the number of shares sold at each separate pricewithin the range set forth on this footnote ( 2 )Reflects the transfer of 13,111 shares of Common Stock to the reporting person's former spouse pursuant to a domestic relations order. ( 3 )Reflects the transfer of 48,298 shares of Common Stock to the reporting person's former spouse pursuant to a domestic relations order. ( 4 )Represents restricted stock units granted under the issuer's 2023 Incentive Award Plan, (the "Plan"); one-third of the units vest on each of February 15, 2026, February 15, 2027 and February 15, 2028, subject to the terms of the Plan and related award agreement. ( 5 )Represents shares withheld for payment of taxes on vesting of restricted stock units; not an open market transaction. ( 6 )Represents performance-based restricted stock units earned under the issuer's 2015 Sprint Omnibus Incentive Plan, that vested on February 15, 2025 based on the Company's relative total shareholderreturn during the three-year period ending February 15, 2025. ( 7 )Represents shares withheld for payment of taxes on vesting of performance-based restricted stock units; not an open market transaction.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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