T-Mobile buybacks lift Telekom group’s stake to 55.9%

Issuer repurchases reduced the outstanding-share base, increasing the reporting persons' disclosed ownership percentage to 55.9%.

Rhea-AI Filing Summary

T-Mobile US, Inc.'s reporting persons—Deutsche Telekom AG, T-Mobile Global Zwischenholding GmbH, T-Mobile Global Holding GmbH and Deutsche Telekom Holding B.V.—amended their ownership disclosure after T-Mobile repurchases reduced shares outstanding, increasing their reported percentage. As of October 23, 2026, the reporting persons beneficially owned 592,065,875 common shares, or 55.9% of shares outstanding.

The reported amount consists of 582,065,875 shares held by Deutsche Telekom Holding B.V. and 10,000,000 shares held by Signal Bright LLC and subject to the Proxy. The 10,000,000 Signal Bright shares are also subject to call options granted to Deutsche Telekom AG. Deutsche Telekom disclaims beneficial ownership of Signal Bright shares that are not subject to the Proxy.

Key Figures

Aggregate beneficial ownership: 592,065,875 shares Percentage of shares outstanding: 55.9% Shares held by Deutsche Telekom Holding B.V.: 582,065,875 shares +1 more

4 metrics

Aggregate beneficial ownership 592,065,875 shares As of October 23, 2026

Percentage of shares outstanding 55.9% As of October 23, 2026

Shares held by Deutsche Telekom Holding B.V. 582,065,875 shares Included in the aggregate beneficial ownership

Signal Bright shares subject to the Proxy 10,000,000 shares Included in the aggregate beneficial ownership

Key Terms

beneficially own, sole dispositive power, Proxy, call options

4 terms

beneficially own regulatory

"beneficially own, in aggregate, 592,065,875 shares"

Beneficially own means having the economic rights and risks of a security—such as the right to receive dividends, sell the shares, or profit from price changes—whether or not your name appears on the official share register. Think of it like renting a car: you use it and reap the benefits even if the title lists someone else. Investors care because beneficial ownership determines who truly controls value, must be disclosed under securities rules, and can signal potential influence or trading activity that affects a stock’s price.

sole dispositive power regulatory

"Sole Dispositive Power 582,065,875.00"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

Proxy regulatory

"10,000,000 shares of Common Stock ... subject to the Proxy"

A proxy is the authorization a shareholder gives to another person or document to cast votes on their behalf at a company meeting. Think of it like handing someone your voting ticket so they can represent your choices on board elections, executive pay, mergers and other big decisions; it matters because proxies determine who controls the company and which proposals pass, directly affecting share value and investor returns.

call options financial

"shares ... subject to call options granted by Signal Bright"

A call option is a contract that gives its buyer the right, but not the obligation, to buy a specific number of shares at a predetermined price within a set time. Think of it like a refundable reservation to purchase a stock later at today’s agreed price: investors use calls to profit from expected price rises with smaller upfront cost than buying the stock outright, or to hedge and manage exposure, while the most they can lose is the amount paid for the contract.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What percentage of TMUS does Deutsche Telekom's reporting group beneficially own?

As of October 23, 2026, the reporting persons beneficially owned 592,065,875 common shares, or 55.9% of shares outstanding. The reported amount consists of 582,065,875 shares held by Deutsche Telekom Holding B.V. and 10,000,000 shares held by Signal Bright LLC and subject to the Proxy.

Which TMUS shares are included in the reported ownership?

The reported amount includes 10,000,000 Signal Bright LLC shares subject to the Proxy; those shares are also subject to call options granted by Signal Bright to Deutsche Telekom AG. Deutsche Telekom disclaims beneficial ownership of Signal Bright shares that are not subject to the Proxy.

Did the TMUS reporting persons transact in common stock recently?

Except as previously reported, the reporting persons stated that none had effected a transaction in T-Mobile common stock during the 60 days preceding the date of the amendment.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 10/29/2026 - 04:18 PM EDT Accepted by SEC EDGAR 10/29/2026 - 04:17 PM EDT Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 36)

T-Mobile US, Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

872590104

(CUSIP Number)

Dr. Axel Lutzner, VP DT Legal
Deutsche Telekom AG, Friedrich-Ebert-Allee 140
Bonn, 2M, 53113
49-228-181-0

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

10/28/2026

(Date of Event Which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.

The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

schemaVersion:

SCHEDULE 13D

CUSIP Number(s): 872590104

1

Name of reporting person

Deutsche Telekom AG

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

GERMANY

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 592,065,875.00
8	Shared Voting Power 0.00
9	Sole Dispositive Power 582,065,875.00
10	Shared Dispositive Power 0.00

11

Aggregate amount beneficially owned by each reporting person

592,065,875.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

55.9 %

14

Type of Reporting Person (See Instructions)

CO

SCHEDULE 13D

CUSIP Number(s): 872590104

1

Name of reporting person

Deutsche Telekom Holding B.V.

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

NETHERLANDS

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 592,065,875.00
8	Shared Voting Power 0.00
9	Sole Dispositive Power 582,065,875.00
10	Shared Dispositive Power 0.00

11

Aggregate amount beneficially owned by each reporting person

592,065,875.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

55.9 %

14

Type of Reporting Person (See Instructions)

CO

SCHEDULE 13D

CUSIP Number(s): 872590104

1

Name of reporting person

T-Mobile Global Holding GmbH

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

GERMANY

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 592,065,875.00
8	Shared Voting Power 0.00
9	Sole Dispositive Power 582,065,875.00
10	Shared Dispositive Power 0.00

11

Aggregate amount beneficially owned by each reporting person

592,065,875.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

55.9 %

14

Type of Reporting Person (See Instructions)

CO

SCHEDULE 13D

CUSIP Number(s): 872590104

1

Name of reporting person

T-Mobile Global Zwischenholding GmbH

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

GERMANY

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 592,065,875.00
8	Shared Voting Power 0.00
9	Sole Dispositive Power 582,065,875.00
10	Shared Dispositive Power 0.00

11

Aggregate amount beneficially owned by each reporting person

592,065,875.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

55.9 %

14

Type of Reporting Person (See Instructions)

CO

SCHEDULE 13D

Item 1.	Security and Issuer
(a)	Title of Class of Securities: Common Stock
(b)	Name of Issuer: T-Mobile US, Inc.
(c)	Address of Issuer's Principal Executive Offices: 12920 SE 38th Street, Bellevue, WASHINGTON , 98006.
Item 1 Comment: This Amendment No. 36 (this "Amendment No. 36") to the Schedule 13D filed with the U.S. Securities and Exchange Commission (the "Commission") on May 10, 2013 (as amended and supplemented from time to time, this "Schedule 13D"), is being filed by Deutsche Telekom AG, a stock corporation (Aktiengesellschaft) organized under the laws of the Federal Republic of Germany ("Deutsche Telekom"), T-Mobile Global Zwischenholding GmbH, a limited liability company (Gesellschaft mit beschrankter Haftung) organized under the laws of the Federal Republic of Germany and a direct wholly owned subsidiary of Deutsche Telekom ("T-Mobile Global"), T-Mobile Global Holding GmbH, a limited liability company (Gesellschaft mit beschrankter Haftung) organized under the laws of the Federal Republic of Germany and a direct wholly owned subsidiary of T-Mobile Global ("T-Mobile Holding"), and Deutsche Telekom Holding B.V., a limited liability company (besloten vennootschap met beperkte aansprakelijkheid) organized under the laws of the Netherlands and a direct wholly owned subsidiary of T-Mobile Holding ("DT Holding" and, together with Deutsche Telekom, T-Mobile Global and T-Mobile Holding, the "Reporting Persons", and each, a "Reporting Person"), pursuant to Section 13(d) of the Exchange Act, and Rule 13d-2(a) thereunder, with respect to the shares of common stock, par value $0.00001 per share (the "Common Stock"), of T-Mobile US, Inc., a Delaware corporation (the "Issuer" or "T-Mobile"). This Amendment No. 36 is being filed to update this Schedule 13D to reflect the decrease in the total amount of Common Stock outstanding as a result of a series of Common Stock repurchases by the Issuer, which has increased the percent of Common Stock owned by the Reporting Persons. Except as set forth below, all Items of this Schedule 13D, as amended prior to the date hereof, are materially unchanged. Capitalized terms used in this Amendment No. 36 and not otherwise defined shall have the respective meanings assigned to such terms in this Schedule 13D. Deutsche Telekom disclaims beneficial ownership in any Common Stock held by Delaware Project 6 L.L.C., Delaware Project 9 L.L.C. and Signal Bright LLC ("Signal Bright"), each a wholly-owned subsidiary of SoftBank Group Corp. ("SoftBank"), if such Common Stock is not subject to the Proxy.
Item 2.	Identity and Background
(a)	This Item 2 is hereby amended and supplemented as follows: The information set forth in Schedules A-1, A-3 and A-4 of this Schedule 13D (filed herewith as Exhibits 70, 71 and 72, respectively) is hereby incorporated by reference.
(b)	Same as (a) above.
(c)	Same as (a) above.
(d)	Same as (a) above.
(e)	Same as (a) above.
(f)	Same as (a) above.
Item 5.	Interest in Securities of the Issuer
(a)	This Item 5 is hereby amended and supplemented as follows: The information contained in the cover pages of this Schedule 13D is incorporated herein by reference. As of the date hereof, the Reporting Persons beneficially own, in aggregate, 592,065,875 shares of Common Stock consisting of (i) 582,065,875 shares of Common Stock held by DT Holding and (ii) 10,000,000 shares of Common Stock held by Signal Bright and subject to the Proxy (of which 10,000,000 of such shares of Common Stock are subject to call options granted by Signal Bright to Deutsche Telekom), representing 55.9% of the shares of the Common Stock outstanding as of October 23, 2026, as reported by the Issuer in its Quarterly Report on Form 10-Q filed with the Commission on October 28, 2026. The number of shares of Common Stock held by Signal Bright is based solely on the information provided by SoftBank. In addition, Dr. Frank Appel, Chairman of Deutsche Telekom's supervisory board, and Dr. Thomas Dohmke and Natalie Knight, members of Deutsche Telekom's supervisory board, beneficially own 190 shares, 25 shares and 1,600 shares of Common Stock, respectively, which in each case represents less than 0.01% of the shares of Common Stock issued and outstanding as of October 23, 2026, as reported by the Issuer in its Quarterly Report on Form 10-Q filed with the Commission on October 28, 2026. To the best knowledge of the Reporting Persons, each of Dr. Frank Appel, Dr. Thomas Dohmke and Natalie Knight has the sole power to vote or direct the vote or dispose or direct the disposition of all of the shares of Common Stock beneficially owned by such person.
(b)	Same as (a) above.
(c)	Except as previously reported on this Schedule 13D, to the best knowledge of the Reporting Persons, none of the Reporting Persons has effected any transaction in Common Stock in the 60 days preceding the date hereof.
Item 7.	Material to be Filed as Exhibits.
	Exhibit 70 - Schedule A-1: Directors and Executive Officers of T-Mobile Global Holding GmbH Exhibit 71 - Schedule A-3: Directors and Executive Officers of Deutsche Telekom AG Exhibit 72 - Schedule A-4: Directors and Executive Officers of Deutsche Telekom Holding B.V.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Deutsche Telekom AG

Signature:	/s/ Christoph Appel
Name/Title:	Christoph Appel / Attorney-in-fact
Date:	10/29/2026

Deutsche Telekom Holding B.V.

Signature:	/s/ Christoph Appel
Name/Title:	Christoph Appel / Attorney-in-fact
Date:	10/29/2026

T-Mobile Global Holding GmbH

Signature:	/s/ Christoph Appel
Name/Title:	Christoph Appel / Attorney-in-fact
Date:	10/29/2026

T-Mobile Global Zwischenholding GmbH

Signature:	/s/ Christoph Appel
Name/Title:	Christoph Appel / Attorney-in-fact
Date:	10/29/2026