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

Filing Impact
(High)
Filing Sentiment
(Very Negative)
Form Type
4
Rhea-AI Filing Summary

Michael G. Sievert, President and Chief Executive Officer and a director of T-Mobile US, Inc. (TMUS), reported sales of company common stock pursuant to a Rule 10b5-1 trading plan. The filing shows two dispositions: 22,500 shares sold on 08/18/2025 at a weighted average price of $255.58 (individual trades ranged $254.64鈥�$256.72) and 22,500 shares sold on 08/19/2025 at a weighted average price of $257.17 (individual trades ranged $254.45鈥�$258.42). After the 08/18 sale the filing reports beneficial ownership of 358,721.576 shares; after the 08/19 sale beneficial ownership is reported as 336,221.576 shares. The transactions were effected under a 10b5-1 plan adopted November 14, 2024, and the Form 4 was signed by an attorney-in-fact on 08/20/2025.

Michael G. Sievert, Presidente, Amministratore Delegato e membro del consiglio di T-Mobile US, Inc. (TMUS), ha venduto azioni ordinarie dell'azienda nell'ambito di un piano di negoziazione ai sensi della Rule 10b5-1. La comunicazione riporta due disposizioni: 22.500 azioni vendute il 18/08/2025 a prezzo medio ponderato di $255,58 (operazioni individuali tra $254,64 e $256,72) e 22.500 azioni vendute il 19/08/2025 a prezzo medio ponderato di $257,17 (operazioni individuali tra $254,45 e $258,42). Dopo la vendita del 18/08 la comunicazione indica una titolarit脿 beneficiaria di 358.721,576 azioni; dopo la vendita del 19/08 la titolarit脿 beneficiaria 猫 riportata in 336.221,576 azioni. Le transazioni sono state eseguite nell'ambito di un piano 10b5-1 adottato il 14 novembre 2024, e il Modulo 4 猫 stato firmato da un procuratore il 20/08/2025.

Michael G. Sievert, Presidente, Director Ejecutivo y miembro del consejo de T-Mobile US, Inc. (TMUS), inform贸 ventas de acciones ordinarias de la compa帽铆a bajo un plan de negociaci贸n conforme a la Regla 10b5-1. La presentaci贸n muestra dos disposiciones: 22.500 acciones vendidas el 18/08/2025 a un precio medio ponderado de $255,58 (operaciones individuales entre $254,64 y $256,72) y 22.500 acciones vendidas el 19/08/2025 a un precio medio ponderado de $257,17 (operaciones individuales entre $254,45 y $258,42). Tras la venta del 18/08 la presentaci贸n informa una titularidad beneficiaria de 358.721,576 acciones; tras la venta del 19/08 la titularidad beneficiaria se reporta en 336.221,576 acciones. Las transacciones se efectuaron bajo un plan 10b5-1 adoptado el 14 de noviembre de 2024, y el Formulario 4 fue firmado por un apoderado el 20/08/2025.

Michael G. Sievert電� T-Mobile US, Inc. (TMUS)鞚� 須岇灔 瓴� 斓滉碃瓴届榿鞛�(CEO) 氚� 鞚挫偓搿滌劀 Rule 10b5-1 瓯半灅 瓿勴殟鞐� 霐半澕 須岇偓 氤错喌欤茧ゼ 毵る弰頄堧嫟瓿� 氤搓碃頄堨姷雼堧嫟. 鞝滌稖靹滊鞐愲姅 霊� 瓯挫潣 觳橂秳鞚� 旮办灛霅橃柎 鞛堨姷雼堧嫟: 2025-08-18鞐� 22,500欤茧ゼ 臧�欷戫弶攴犼皜 $255.58鞐� 毵る弰(臧滊硠 瓯半灅電� $254.64鈥�$256.72 氩旍渼), 2025-08-19鞐� 22,500欤茧ゼ 臧�欷戫弶攴犼皜 $257.17鞐� 毵る弰(臧滊硠 瓯半灅電� $254.45鈥�$258.42 氩旍渼). 08/18 毵る弰 頉� 鞝滌稖靹滊鞐愲姅 358,721.576欤检潣 鞁れ 氤挫湢(beneficial ownership)臧� 氤搓碃霅橃柎 鞛堨溂氅�, 08/19 毵る弰 頉勳棎電� 336,221.576欤茧 氤搓碃霅橃柎 鞛堨姷雼堧嫟. 鞚� 瓯半灅霌れ潃 2024雲� 11鞗� 14鞚� 毂勴儩霅� 10b5-1 瓿勴殟鞐� 霐半澕 鞚措（鞏挫鞙茧┌, Form 4電� 2025-08-20鞐� 雽�毽澑鞚� 靹滊獏頄堨姷雼堧嫟.

Michael G. Sievert, pr茅sident-directeur g茅n茅ral et administrateur de T-Mobile US, Inc. (TMUS), a d茅clar茅 des ventes d'actions ordinaires de la soci茅t茅 effectu茅es en vertu d'un plan de n茅gociation conforme 脿 la r猫gle 10b5-1. Le dossier fait 茅tat de deux cessions : 22 500 actions vendues le 18/08/2025 脿 un prix moyen pond茅r茅 de 255,58 $ (transactions individuelles entre 254,64 $ et 256,72 $) et 22 500 actions vendues le 19/08/2025 脿 un prix moyen pond茅r茅 de 257,17 $ (transactions individuelles entre 254,45 $ et 258,42 $). Apr猫s la vente du 18/08, le dossier signale une d茅tention b茅n茅ficiaire de 358 721,576 actions ; apr猫s la vente du 19/08, la d茅tention b茅n茅ficiaire est indiqu茅e 脿 336 221,576 actions. Les transactions ont 茅t茅 effectu茅es dans le cadre d'un plan 10b5-1 adopt茅 le 14 novembre 2024, et le formulaire 4 a 茅t茅 sign茅 par un mandataire le 20/08/2025.

Michael G. Sievert, Pr盲sident, Chief Executive Officer und Direktor von T-Mobile US, Inc. (TMUS), meldete Verk盲ufe von Stammaktien des Unternehmens im Rahmen eines Rule-10b5-1-Handelsplans. Die Einreichung weist zwei Ver盲u脽erungen aus: 22.500 Aktien, verkauft am 18.08.2025 zu einem gewichteten Durchschnittspreis von $255,58 (Einzeltransaktionen zwischen $254,64 und $256,72) und 22.500 Aktien, verkauft am 19.08.2025 zu einem gewichteten Durchschnittspreis von $257,17 (Einzeltransaktionen zwischen $254,45 und $258,42). Nach dem Verkauf am 18.08. meldet die Einreichung ein wirtschaftliches Eigentum von 358.721,576 Aktien; nach dem Verkauf am 19.08. wird ein wirtschaftliches Eigentum von 336.221,576 Aktien angegeben. Die Transaktionen erfolgten im Rahmen eines am 14. November 2024 angenommenen 10b5-1-Plans, und das Formular 4 wurde am 20.08.2025 von einem Bevollm盲chtigten unterzeichnet.

Positive
  • Sales executed under a Rule 10b5-1 plan, indicating the transactions were preplanned and intended to provide affirmative defense
  • Filing discloses weighted average prices and trade price ranges, enhancing transaction transparency
  • Prompt reporting with an attorney-in-fact signature on the Form 4
Negative
  • Insider reduced holdings by 45,000 shares, with beneficial ownership reported at 336,221.576 shares after the second sale
  • Large insider sales may attract market scrutiny despite being preplanned

Insights

TL;DR: CEO stock sales were executed under a preplanned 10b5-1 arrangement, showing procedural compliance but reducing insider holdings.

The Form 4 discloses routine, prearranged sales by the CEO under a Rule 10b5-1 plan adopted on November 14, 2024. Reporting the weighted average prices and the full ranges of execution enhances transparency. The filing documents a decline in the CEO's beneficial stake to 336,221.576 shares after the second sale. From a governance perspective, use of a 10b5-1 plan and prompt Form 4 reporting aligns with good disclosure practices; however, repeated sizeable sales by an executive can attract investor attention even if lawful and planned.

TL;DR: Materiality appears limited to disclosure; two sales totaling 45,000 shares were executed at mid-$250s prices.

The transactions total 45,000 shares sold across two trading dates at weighted average prices of $255.58 and $257.17. These specifics allow investors to quantify the cash realized by the reporting person if desired and confirm adherence to a documented trading plan. The filing does not include any derivative activity or other compensatory transactions, and no additional information about prior ownership concentration or percentage ownership is provided beyond the post-sale share counts.

Michael G. Sievert, Presidente, Amministratore Delegato e membro del consiglio di T-Mobile US, Inc. (TMUS), ha venduto azioni ordinarie dell'azienda nell'ambito di un piano di negoziazione ai sensi della Rule 10b5-1. La comunicazione riporta due disposizioni: 22.500 azioni vendute il 18/08/2025 a prezzo medio ponderato di $255,58 (operazioni individuali tra $254,64 e $256,72) e 22.500 azioni vendute il 19/08/2025 a prezzo medio ponderato di $257,17 (operazioni individuali tra $254,45 e $258,42). Dopo la vendita del 18/08 la comunicazione indica una titolarit脿 beneficiaria di 358.721,576 azioni; dopo la vendita del 19/08 la titolarit脿 beneficiaria 猫 riportata in 336.221,576 azioni. Le transazioni sono state eseguite nell'ambito di un piano 10b5-1 adottato il 14 novembre 2024, e il Modulo 4 猫 stato firmato da un procuratore il 20/08/2025.

Michael G. Sievert, Presidente, Director Ejecutivo y miembro del consejo de T-Mobile US, Inc. (TMUS), inform贸 ventas de acciones ordinarias de la compa帽铆a bajo un plan de negociaci贸n conforme a la Regla 10b5-1. La presentaci贸n muestra dos disposiciones: 22.500 acciones vendidas el 18/08/2025 a un precio medio ponderado de $255,58 (operaciones individuales entre $254,64 y $256,72) y 22.500 acciones vendidas el 19/08/2025 a un precio medio ponderado de $257,17 (operaciones individuales entre $254,45 y $258,42). Tras la venta del 18/08 la presentaci贸n informa una titularidad beneficiaria de 358.721,576 acciones; tras la venta del 19/08 la titularidad beneficiaria se reporta en 336.221,576 acciones. Las transacciones se efectuaron bajo un plan 10b5-1 adoptado el 14 de noviembre de 2024, y el Formulario 4 fue firmado por un apoderado el 20/08/2025.

Michael G. Sievert電� T-Mobile US, Inc. (TMUS)鞚� 須岇灔 瓴� 斓滉碃瓴届榿鞛�(CEO) 氚� 鞚挫偓搿滌劀 Rule 10b5-1 瓯半灅 瓿勴殟鞐� 霐半澕 須岇偓 氤错喌欤茧ゼ 毵る弰頄堧嫟瓿� 氤搓碃頄堨姷雼堧嫟. 鞝滌稖靹滊鞐愲姅 霊� 瓯挫潣 觳橂秳鞚� 旮办灛霅橃柎 鞛堨姷雼堧嫟: 2025-08-18鞐� 22,500欤茧ゼ 臧�欷戫弶攴犼皜 $255.58鞐� 毵る弰(臧滊硠 瓯半灅電� $254.64鈥�$256.72 氩旍渼), 2025-08-19鞐� 22,500欤茧ゼ 臧�欷戫弶攴犼皜 $257.17鞐� 毵る弰(臧滊硠 瓯半灅電� $254.45鈥�$258.42 氩旍渼). 08/18 毵る弰 頉� 鞝滌稖靹滊鞐愲姅 358,721.576欤检潣 鞁れ 氤挫湢(beneficial ownership)臧� 氤搓碃霅橃柎 鞛堨溂氅�, 08/19 毵る弰 頉勳棎電� 336,221.576欤茧 氤搓碃霅橃柎 鞛堨姷雼堧嫟. 鞚� 瓯半灅霌れ潃 2024雲� 11鞗� 14鞚� 毂勴儩霅� 10b5-1 瓿勴殟鞐� 霐半澕 鞚措（鞏挫鞙茧┌, Form 4電� 2025-08-20鞐� 雽�毽澑鞚� 靹滊獏頄堨姷雼堧嫟.

Michael G. Sievert, pr茅sident-directeur g茅n茅ral et administrateur de T-Mobile US, Inc. (TMUS), a d茅clar茅 des ventes d'actions ordinaires de la soci茅t茅 effectu茅es en vertu d'un plan de n茅gociation conforme 脿 la r猫gle 10b5-1. Le dossier fait 茅tat de deux cessions : 22 500 actions vendues le 18/08/2025 脿 un prix moyen pond茅r茅 de 255,58 $ (transactions individuelles entre 254,64 $ et 256,72 $) et 22 500 actions vendues le 19/08/2025 脿 un prix moyen pond茅r茅 de 257,17 $ (transactions individuelles entre 254,45 $ et 258,42 $). Apr猫s la vente du 18/08, le dossier signale une d茅tention b茅n茅ficiaire de 358 721,576 actions ; apr猫s la vente du 19/08, la d茅tention b茅n茅ficiaire est indiqu茅e 脿 336 221,576 actions. Les transactions ont 茅t茅 effectu茅es dans le cadre d'un plan 10b5-1 adopt茅 le 14 novembre 2024, et le formulaire 4 a 茅t茅 sign茅 par un mandataire le 20/08/2025.

Michael G. Sievert, Pr盲sident, Chief Executive Officer und Direktor von T-Mobile US, Inc. (TMUS), meldete Verk盲ufe von Stammaktien des Unternehmens im Rahmen eines Rule-10b5-1-Handelsplans. Die Einreichung weist zwei Ver盲u脽erungen aus: 22.500 Aktien, verkauft am 18.08.2025 zu einem gewichteten Durchschnittspreis von $255,58 (Einzeltransaktionen zwischen $254,64 und $256,72) und 22.500 Aktien, verkauft am 19.08.2025 zu einem gewichteten Durchschnittspreis von $257,17 (Einzeltransaktionen zwischen $254,45 und $258,42). Nach dem Verkauf am 18.08. meldet die Einreichung ein wirtschaftliches Eigentum von 358.721,576 Aktien; nach dem Verkauf am 19.08. wird ein wirtschaftliches Eigentum von 336.221,576 Aktien angegeben. Die Transaktionen erfolgten im Rahmen eines am 14. November 2024 angenommenen 10b5-1-Plans, und das Formular 4 wurde am 20.08.2025 von einem Bevollm盲chtigten unterzeichnet.

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*
SIEVERT G MICHAEL
(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
X Officer (give title below) Other (specify below)
President and CEO
3. Date of Earliest Transaction (Month/Day/Year)
08/18/2025
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 08/18/2025 S 22,500(1) D $255.58(2) 358,721.576 D
Common Stock 08/19/2025 S 22,500(1) D $257.17(3) 336,221.576 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. This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 14, 2024.
2. The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $254.64 to $256.72. 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.
3. The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $254.45 to $258.42. 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.
Remarks:
/s/ Frederick Williams, Attorney-in-Fact 08/20/2025
** 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.

Source:

FAQ

What did TMUS CEO Michael Sievert report on Form 4?

The Form 4 reports that Michael G. Sievert sold 22,500 shares on 08/18/2025 and 22,500 shares on 08/19/2025 pursuant to a Rule 10b5-1 trading plan.

At what prices were the TMUS shares sold by the CEO?

The sales were reported at weighted average prices of $255.58 (08/18/2025) and $257.17 (08/19/2025) with trade ranges disclosed in the filing.

How many TMUS shares does Michael Sievert beneficially own after these transactions?

The filing reports beneficial ownership of 358,721.576 shares after the 08/18 sale and 336,221.576 shares after the 08/19 sale.

Were the transactions part of an insider trading plan?

Yes. The transactions were effected under a 10b5-1 trading plan adopted on November 14, 2024 as stated in the Form 4.

Who signed the Form 4 for the reporting person?

The Form 4 bears the signature of Frederick Williams, Attorney-in-Fact, dated 08/20/2025.
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Telecom Services
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BELLEVUE