[144] T-Mobile US, Inc. SEC Filing

Rhea-AI Filing Summary

T-Mobile US, Inc. (TMUS) insider Michael Katz plans to sell 2,500 shares of common stock held from a restricted stock vesting on 03/04/2024. The filing lists an approximate sale date of 08/15/2025 on NASDAQ through Fidelity Brokerage Services and shows the shares represent part of roughly 1.125 billion shares outstanding. The filing also discloses a prior sale of 2,500 shares on 05/15/2025 for $592,800 and an aggregate market value for the proposed 2,500-share transaction of $627,800, indicating a per-share market valuation implied by those totals. The notice affirms the seller does not possess undisclosed material nonpublic information.

Positive

• Compliance disclosure completed with acquisition and broker details, satisfying Rule 144 requirements
• Small transaction size relative to ~1.125 billion shares outstanding, implying limited market impact

Negative

• None.

Insights

Securities Analyst

TL;DR: Routine insider sale of a small stake from vested restricted stock; immaterial to company capitalization.

The notice documents a planned sale of 2,500 shares by an insider following restricted stock vesting. Given the company's ~1.125 billion shares outstanding, this disposal is de minimis relative to market capitalization and is consistent with typical post-vesting selling activity. The filing includes prior recent sales of the same volume, suggesting routine liquidity actions rather than a shift in insider conviction. No new financial metrics, governance changes, or material events are disclosed.

Corporate Governance Expert

TL;DR: Compliance-focused filing showing adherence to Rule 144 requirements and 10b5-1 representations.

The Form 144 provides required details on acquisition date, nature of acquisition (compensation via restricted stock vesting), broker, and intended sale date. The signer affirms lack of undisclosed material information, which is standard. The transaction appears to follow disclosure and aggregation rules; there is no indication of an extraordinary or coordinated disposition that would raise governance concerns.

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

Relationship to Issuer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	2500	627800.00	1125419038	08/15/2025	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	03/04/2024	Restricted Stock Vesting	Issuer			2500	03/04/2024	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Michael Katz 12920 SE 38th Street Bellevue WA 98006-1350	Common	05/15/2025	2500	592800.00

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

ATTENTION:

The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.

Signature

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does the TMUS Form 144 disclose?

It discloses an intended sale of 2,500 TMUS shares by Michael Katz acquired via restricted stock vesting on 03/04/2024, to be sold via Fidelity on NASDAQ around 08/15/2025.

How large is the proposed sale versus total TMUS shares outstanding?

The filing lists 2,500 shares against 1,125,419,038 shares outstanding, so the sale is immaterial to total share count.

Was there any recent sale by the same insider?

Yes, the filing reports a prior sale of 2,500 shares on 05/15/2025 for $592,800.

How were the shares originally acquired?

The shares were acquired through restricted stock vesting on 03/04/2024 and were compensation from the issuer.

Which broker is handling the sale?

The intended broker is Fidelity Brokerage Services LLC, at an address listed in Smithfield, RI.