[Form 3] T-Mobile US, Inc. Initial Statement of Beneficial Ownership

Rhea-AI Filing Summary

T-Mobile US, Inc. (TMUS) Form 3 reports an initial beneficial ownership by John Saw, identified as President of Technology & CTO and a director/officer. The filing shows 40,026 shares of common stock held directly, which include 13,575 restricted stock units and 10,677 performance-based restricted stock units (the minimum award, equal to 80% of target). The PRSUs vest in full on April 1, 2028. No derivative securities are reported.

Positive

• Officer ownership disclosed: The reporting person holds 40,026 shares, aligning executive and shareholder interests
• Clear vesting detail: PRSUs vest in full on April 1, 2028, providing transparency on timing of ownership changes
• Disclosure of plan sources: Awards originate under the issuer's 2015 Plan and 2023 Plan, clarifying grant programs

Negative

• No derivatives reported: Table II shows no options, warrants, or other derivative securities, limiting insight into potential exercised upside
• Performance outcomes unspecified: Additional restricted units beyond the minimum depend on performance metrics that are not detailed in this filing

Insights

Corporate Governance Expert

TL;DR: Officer/director reports 40,026 direct shares, including RSUs and time- and performance-based awards.

This Form 3 documents an initial ownership position by a senior technology officer who is also a director. The reported 40,026 common shares combine time-based restricted stock units (13,575) and a minimum grant of performance-based RSUs (10,677), with PRSUs vesting in full on April 1, 2028. The filing contains no derivative instruments. For governance review, the disclosure aligns with Section 16 reporting expectations and clarifies the nature and vesting timeline of equity awards.

Compensation & Equity Plan Specialist

TL;DR: Equity holdings are a mix of time-vested RSUs and performance-based RSUs, with defined vesting and minimum payout disclosed.

The schedule shows holdings tied to the issuer's 2015 and 2023 equity plans, specifying vesting conditions and that additional restricted units may be earned upon achievement of performance metrics. The explicit minimum PRSU amount equal to 80% of target is disclosed, and the full vest date for PRSUs provides clarity on potential future dilution timing.

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0104
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1. Name and Address of Reporting Person^*

SAW JOHN

(Last) (First) (Middle)

C/O T-MOBILE US, INC.

12920 SE 38TH STREET

(Street)

BELLEVUE WA 98006

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
09/19/2025

3. Issuer Name and Ticker or Trading Symbol
T-Mobile US, Inc. [ TMUS ]

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Pres of Technology & CTO

5. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	40,026(1)	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Includes (a) 13,575 restricted stock units granted under the Sprint Corporation Amended and Restated 2015 Omnibus Incentive Plan (the "2015 Plan") and issuer's 2023 Incentive Award Plan (the "2023 Plan", together with the 2015 Plan, the "Plans"), subject to the terms of the Plans and such awards including vesting terms and (b) 10,677 performance-based restricted stock units (PRSUs), the minimum number of PRSUs awarded to the reporting person under the 2023 Plan , which is equal to 80% of the target grant. The PRSUs will vest in full on April 1, 2028, and additional restricted stock units may be earned based on the achievement of certain performance metrics subject to the terms of the 2023 Plan and such award.

Remarks:

	/s/ Frederick Williams, Attorney-in-Fact	09/26/2025
	** Signature of Reporting Person	Date
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 5 (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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

Who filed the Form 3 for TMUS and what is their role?

The Form 3 was filed for John Saw, listed as President of Technology & CTO and a director/officer of T-Mobile US, Inc.

How many shares does John Saw report owning on the Form 3?

The filing reports 40,026 shares of common stock beneficially owned directly by the reporting person.

What restricted stock awards are included in the 40,026 shares?

Included are 13,575 restricted stock units from the 2015 and 2023 plans and 10,677 performance-based restricted stock units (the minimum award).

When do the performance-based restricted stock units vest?

The PRSUs are disclosed to vest in full on April 1, 2028.

Does the Form 3 report any derivative securities for TMUS?

No. Table II indicates no derivative securities (such as options or warrants) are reported on this Form 3.