Director-linked entity sells 1,000 T-Mobile (TMUS) shares at $218

Rhea-AI Filing Summary

T-Mobile US, Inc. director Srikant M. Datar, through entity Legacycap LLC, reported an open-market sale of 1,000 shares of common stock at $218.2501 per share. Following the sale, Legacycap LLC holds 10,843 shares indirectly.

Datar also has indirect holdings of 11,724 shares through Safari LLC and 8,200 shares through Datar Investment LLC, plus 1,038 shares held directly. He has shared voting and investment power over the securities held by these LLCs.

SEC Form 4

FORM 4

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
or Section 30(h) of the Investment Company Act of 1940

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

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Datar Srikant M.

(Last) (First) (Middle)

C/O T-MOBILE US, INC.

12920 SE 38TH STREET

(Street)

BELLEVUE WA 98006

(City) (State) (Zip)

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

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

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
03/10/2026

4. 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 Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	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	03/10/2026		S		1,000	D	$218.2501	10,843	I	By Legacycap LLC(1)
Common Stock								11,724	I	By Safari LLC(1)
Common Stock								8,200	I	By Datar Investment LLC(1)
Common Stock								1,038	D

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 (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	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 (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (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: 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

Explanation of Responses:

1. Mr. Datar is a co-manager of Datar Investment LLC, Safari LLC, and Legacycap LLC and has shared voting and investment power over the securities held by these entities.

Remarks:

	/s/ Frederick Williams, Attorney-in-Fact	03/12/2026
	** 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 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).
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

What insider transaction did T-Mobile (TMUS) disclose for Srikant M. Datar?

T-Mobile reported that an entity linked to director Srikant M. Datar sold 1,000 shares. Legacycap LLC, an entity he co-manages, executed an open-market sale of 1,000 T-Mobile common shares at $218.2501 per share and continues to hold a sizable remaining position.

At what price were the T-Mobile (TMUS) shares sold in this Form 4 filing?

The reported T-Mobile shares were sold at $218.2501 per share. Legacycap LLC, an entity co-managed by director Srikant M. Datar, sold 1,000 common shares in an open-market transaction at this price while retaining a substantial indirect holding afterward.

How many T-Mobile (TMUS) shares does Legacycap LLC hold after the reported sale?

After the transaction, Legacycap LLC holds 10,843 T-Mobile shares. The Form 4 shows that, despite selling 1,000 common shares in the open market, this Datar-associated entity continues to own a significant indirect stake in T-Mobile US, Inc. common stock.

What other T-Mobile (TMUS) holdings are associated with Srikant M. Datar?

Datar is associated with additional indirect and direct T-Mobile holdings. The filing lists 11,724 shares held by Safari LLC, 8,200 shares by Datar Investment LLC, and 1,038 shares held directly, over which he has shared or direct voting and investment power.

Does Srikant M. Datar personally sell the T-Mobile (TMUS) shares in this Form 4?

The sale was made by Legacycap LLC, an entity co-managed by Datar. The footnote explains he has shared voting and investment power over securities held by Datar Investment LLC, Safari LLC, and Legacycap LLC, so the transaction is attributed to Legacycap LLC rather than a personal account.

Are there any T-Mobile (TMUS) derivative securities reported for Srikant M. Datar?

The Form 4 shows no derivative securities for Datar in this filing. The derivative summary is empty, indicating no options, warrants, or other derivative positions were reported alongside the common stock sale and related indirect and direct common stock holdings.