G. MICHAEL SIEVERT - 19 Feb 2026 Form 4 Insider Report for T-Mobile US, Inc. (TMUS)

Role: Director
Signature: /s/ Frederick Williams, Attorney-in-Fact
Issuer symbol: TMUS
Transactions as of: 19 Feb 2026
Net transactions value: -$17,195,200
Form type: 4
Filing time: 23 Feb 2026, 16:33:43 UTC
Previous filing: 04 Dec 2025
Next filing: 25 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
SIEVERT G MICHAEL	Director	C/O T-MOBILE US, INC., 12920 SE 38TH STREET, BELLEVUE	/s/ Frederick Williams, Attorney-in-Fact	23 Feb 2026	0001182438

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	TMUS	Common Stock	Sale	$17,195,200	-80,000	-36%	$214.94	140,696	19 Feb 2026	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $214.23 to $215.34. The reporting person undertakes to provide 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 price within the range set forth on this footnote.

Content

The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $214.23 to $215.34. The reporting person undertakes to provide 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 price within the range set forth on this footnote.