[Form 4] T-Mobile US, Inc. Insider Trading Activity

Rhea-AI Filing Summary

T-Mobile US, Inc. (TMUS) insiders associated with Deutsche Telekom effected multiple open-market sales of 139,680 shares of T‑Mobile common stock on September 2–3, 2025. The transactions were reported on a Form 4 filed for Deutsche Telekom AG and several wholly owned subsidiaries and were executed pursuant to a 10b5-1 trading plan adopted March 13, 2025. Prices for the sales are reported as weighted-average amounts with ranges disclosed in footnotes, with per-share weighted-average prices shown between about $252.04 and $258.04 across individual line items. Each reporting person is indicated as a director and a >10% owner or an affiliate; ownership following the transactions is reported in the form as approximately 635 million shares (various line items show ~635,363,804 to 635,502,784 shares). The Form 4 is signed by an attorney-in-fact on behalf of the reporting persons on September 4, 2025.

Positive

• Transactions executed under a 10b5-1 trading plan adopted March 13, 2025, indicating pre-arranged dispositions
• Complete disclosure of weighted-average prices and price ranges in footnotes for transparency
• Reporting persons remain large holders after the sales, with post-transaction beneficial ownership reported around 635 million shares

Negative

• Collective sales of 139,680 shares by director-affiliated entities on September 2–3, 2025
• Form 4 does not disclose exact per-trade breakdowns within the reported weighted-average price ranges (available only on request)

Insights

Securities Analyst

TL;DR: Director-affiliated entities sold 139,680 TMUS shares under a pre-established 10b5-1 plan; sales appear routine, not clearly signaling new company information.

The transactions were executed pursuant to a 10b5-1 plan adopted March 13, 2025, which typically indicates pre-arranged, rule‑compliant dispositions rather than opportunistic insider trades. The total number sold, 139,680 shares, is explicitly reported across multiple executions on September 2–3, 2025 with weighted-average prices disclosed by line item. Reported post-transaction beneficial ownership figures are very large (~635 million shares), reflecting that the selling entities remain substantial holders. From a market-impact perspective, these sales are documented and structured; the disclosure does not provide evidence of material nonpublic information or changes to corporate strategy.

Corporate Governance Expert

TL;DR: Multiple Deutsche Telekom-related reporting persons disclosed sales under a 10b5-1 plan; governance filing meets standard SEC reporting practices.

The Form 4 names Deutsche Telekom AG and several wholly owned subsidiaries as reporting persons and includes the required explanatory footnotes about weighted-average prices and price ranges. The report includes a routine disclaimer of beneficial ownership except to the extent of pecuniary interest and clarifies deputies and attorney-in-fact signatures. The presence of a signed attorney-in-fact and the explicit 10b5-1 adoption date supports procedural compliance. The filing contains no indications of director departures, amendments, or other governance events.

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)
09/02/2025

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	09/02/2025		S(1)		700	D	$252.1964(2)	635,502,784	D
Common Stock	09/02/2025		S(1)		600	D	$253.2683(3)	635,502,184	D
Common Stock	09/02/2025		S(1)		2,500	D	$254.2522(4)	635,499,684	D
Common Stock	09/02/2025		S(1)		6,954	D	$255.488(5)	635,492,730	D
Common Stock	09/02/2025		S(1)		32,765	D	$256.0918(6)	635,459,965	D
Common Stock	09/02/2025		S(1)		18,672	D	$257.312(7)	635,441,293	D
Common Stock	09/02/2025		S(1)		7,649	D	$258.0383(8)	635,433,644	D
Common Stock	09/03/2025		S(1)		30,009	D	$252.0351(9)	635,403,635	D
Common Stock	09/03/2025		S(1)		34,901	D	$252.7265(10)	635,368,734	D
Common Stock	09/03/2025		S(1)		3,730	D	$254.5755(11)	635,365,004	D
Common Stock	09/03/2025		S(1)		1,200	D	$253.9971(12)	635,363,804	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 March 13, 2025.

2. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $251.74 to $252.46 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.

3. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $252.76 to $253.74 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 $253.78 to $254.69 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 $254.79 to $255.78 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 $255.79 to $256.78 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 $256.80 to $257.79 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 $257.80 to $258.56 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 $251.38 to $252.37 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 $252.38 to $253.35 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 $253.39 to $253.75 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 $253.78 to $254.39 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	09/04/2025
	/s/ Christoph Appel Attorney-in-fact	09/04/2025
	/s/ Christoph Appel Attorney-in-fact	09/04/2025
	/s/ Christoph Appel Attorney-in-fact	09/04/2025
	** 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).
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FAQ

Who filed the Form 4 reporting TMUS insider activity?

The Form 4 was filed on behalf of Deutsche Telekom AG and related wholly owned subsidiaries (T-Mobile Global Holding GmbH, T-Mobile Global Zwischenholding GmbH, Deutsche Telekom Holding B.V.).

How many T-Mobile (TMUS) shares were sold and on what dates?

A total of 139,680 shares were sold across transactions dated September 2 and September 3, 2025 as reported on the Form 4.

Were the sales part of a 10b5-1 trading plan for TMUS?

Yes. The Form 4 states the transactions were effected pursuant to a 10b5-1 trading plan adopted on March 13, 2025.

What prices were reported for the TMUS share sales?

The Form 4 reports weighted-average line-item prices and discloses price ranges in footnotes; per-line weighted-average prices range roughly from $252.04 to $258.04.

What is the beneficial ownership after the reported transactions?

Post-transaction beneficial ownership figures reported in the filing are approximately 635 million shares across the reporting entities' line items.

Who signed the Form 4 and when?

The Form 4 is signed by Christoph Appel, Attorney-in-fact, on behalf of the reporting persons on September 4, 2025.