[Form 4] DEUTSCHE TELEKOM AG Insider Trading Activity

Rhea-AI Filing Summary

T-Mobile US (TMUS): Reporting persons affiliated with Deutsche Telekom, identified as a director and 10% owner, disclosed open‑market sales of common stock on 10/21/2025 and 10/22/2025 executed under a Rule 10b5‑1 trading plan adopted on June 12, 2025.

Individual trades included 48,143 shares at a weighted average price of $229.1597 and 37,624 shares at $227.063, among others, with multiple transactions priced within stated ranges per footnotes. Following the reported transactions, the filing lists 582,220,759 shares as beneficially owned. Footnotes note that certain shares previously shown were excluded due to a proxy agreement and no pecuniary interest, and that reported prices are weighted averages across multiple trades.

Insights

Equity capital markets analyst

Routine insider sales under a preset 10b5-1 plan; neutral signal.

The filing lists multiple open‑market sales by reporting persons tied to Deutsche Telekom who are designated as a director and 10% owner of T‑Mobile US. Transactions on 10/21/2025 and 10/22/2025 were executed pursuant to a Rule 10b5‑1 plan adopted on June 12, 2025, indicating pre‑scheduled activity.

Weighted average sale prices are disclosed for each tranche (e.g., $229.1597, $227.063), with ranges provided in footnotes, which is typical transparency for aggregated executions. The filing notes an updated beneficial ownership figure of 582,220,759 shares after the reported trades.

This is administrative disclosure of insider trading activity under a preset plan. Actual market impact depends on trade size versus daily liquidity; the excerpt does not provide that context.

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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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

X

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^*

DEUTSCHE TELEKOM AG

(Last) (First) (Middle)

FRIEDRICH-EBERT-ALLEE 140

(Street)

BONN 2M 53113

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

3. Date of Earliest Transaction (Month/Day/Year)
10/21/2025

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

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

	Form filed by One Reporting Person
X	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	10/21/2025		S(1)		3,829	D	$228.2653(3)	582,345,782(2)	D
Common Stock	10/21/2025		S(1)		48,143	D	$229.1597(4)	582,297,639(2)	D
Common Stock	10/21/2025		S(1)		12,454	D	$229.9584(5)	582,285,185(2)	D
Common Stock	10/22/2025		S(1)		868	D	$220.2304(6)	582,284,317(2)	D
Common Stock	10/22/2025		S(1)		1,266	D	$221.5682(7)	582,283,051(2)	D
Common Stock	10/22/2025		S(1)		3,508	D	$223.2373(8)	582,279,543(2)	D
Common Stock	10/22/2025		S(1)		4,230	D	$223.9352(9)	582,275,313(2)	D
Common Stock	10/22/2025		S(1)		3,643	D	$225.1383(10)	582,271,670(2)	D
Common Stock	10/22/2025		S(1)		13,108	D	$226.2405(11)	582,258,562(2)	D
Common Stock	10/22/2025		S(1)		37,624	D	$227.063(12)	582,220,938(2)	D
Common Stock	10/22/2025		S(1)		179	D	$227.7111(13)	582,220,759(2)	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

1. Name and Address of Reporting Person^*

DEUTSCHE TELEKOM AG

(Last) (First) (Middle)

FRIEDRICH-EBERT-ALLEE 140

(Street)

BONN 2M 53113

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

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

1. Name and Address of Reporting Person^*

T-Mobile Global Holding GmbH

(Last) (First) (Middle)

LANDGRABENWEG 151

(Street)

BONN 2M 53227

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

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

1. Name and Address of Reporting Person^*

T-Mobile Global Zwischenholding GmbH

(Last) (First) (Middle)

FRIEDRICH-EBERT-ALLEE 140

(Street)

BONN 2M 53113

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

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

1. Name and Address of Reporting Person^*

Deutsche Telekom Holding B.V.

(Last) (First) (Middle)

STATIONSPLEIN 8K

(Street)

MAASTRICHT P7 6221 BT

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

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

Explanation of Responses:

1. The transactions reported on this Form 4 were effected pursuant to a 10b5-1 trading plan adopted on June 12, 2025.

2. In Column 5 of previously filed Forms 4, the Reporting Persons included Common Stock held by certain affiliates of SoftBank Group Corp. (collectively, "SoftBank") that were subject to a proxy agreement among SoftBank and the Reporting Persons (the "Proxy Agreement"). The Reporting Persons have no pecuniary interest in such Common Stock and, as a result, have not included such Common Stock in Column 5 of this Form 4.

3. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $227.69 to $228.63 per share. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

4. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $228.71 to $229.705 per share. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

5. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $229.71 to $230.185 per share. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

6. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $220.00 to $220.9775 per share. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

7. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $221.02 to $221.9509 per share. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

8. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $222.52 to $223.50 per share. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

9. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $223.55 to $224.535 per share. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

10. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $224.61 to $225.60 per share. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

11. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $225.63 to $226.6291 per share. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

12. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $226.63 to $227.6129 per share. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

13. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $227.6302 to $227.8446 per share. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Remarks:

Solely for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, and the rules and regulations promulgated thereunder ("Section 16"), each Reporting Person may be deemed to be a director-by-deputization by virtue of the fact that each of Timotheus Hoettges, Chief Executive Officer of DT, Dr. Christian P. Illek, Board Member for Finance of DT, Raphael Kubler, Senior Vice President of the Corporate Operating Office of DT and Managing Director of Deutsche Telekom Holding B.V., Thorsten Langheim, Board Member for USA and Group Development of DT, and Dominique Leroy, Board Member for Europe of DT, serve on the board of directors of the Issuer. In addition, Each of T-Mobile Global Zwischenholding GmbH, T-Mobile Global Holding GmbH and Deutsche Telekom Holding B.V. are wholly-owned subsidiaries of DT. Each Reporting Person disclaims beneficial ownership in the securities reported on this Form 4 except to the extent of its pecuniary interest, if any, therein, and this report shall not be deemed to be an admission that such Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose. Deutsche Telekom disclaims beneficial ownership in any Common Stock held by Project 6 or Project 9 if such Common Stock is not subject to the Proxy Agreement.

	/s/ Christoph Appel Attorney-in-fact	10/23/2025
	/s/ Christoph Appel Attorney-in-fact	10/23/2025
	/s/ Christoph Appel Attorney-in-fact	10/23/2025
	/s/ Christoph Appel Attorney-in-fact	10/23/2025
	** 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 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 did DTEGF-affiliated insiders report regarding TMUS stock?

Reporting persons affiliated with Deutsche Telekom disclosed open‑market sales of T‑Mobile US common stock on 10/21/2025 and 10/22/2025.

Were the TMUS insider sales made under a Rule 10b5-1 plan?

Yes. The trades were executed under a Rule 10b5‑1 plan adopted on June 12, 2025.

How many TMUS shares were listed as beneficially owned after the transactions?

The filing lists 582,220,759 shares beneficially owned following the reported transactions.

What prices were disclosed for the TMUS sales?

Weighted average prices are disclosed, including $229.1597 and $227.063, with detailed price ranges provided in footnotes.

Did the filing clarify prior share counts related to a proxy agreement?

Yes. It notes certain SoftBank-related shares were previously shown but are excluded due to no pecuniary interest under a proxy agreement.

Who are the reporting persons’ relationships to TMUS?

They are identified as a director and 10% owner, with affiliations to Deutsche Telekom and its subsidiaries.