T-MOBILE US, INC.

T-Mobile US, Inc. is listed on the Nasdaq Stock Market, and its shareholder disclosure follows the U.S. securities-law framework under which only holders of five percent or more of a class of common stock are generally required to publicly report their positions, typically in a Schedule 13D or Schedule 13G filed with the U.S. Securities and Exchange Commission. The full shareholder base of T-Mobile US, Inc., including smaller retail holdings, is not publicly disclosed, so the position below should be treated as major shareholders only.

The largest disclosed shareholder is Deutsche Telekom AG, a German company listed on the Frankfurt Stock Exchange. In a Schedule 13D/A filed with the SEC on March 23, 2026, reporting an event date of March 19, 2026, Deutsche Telekom AG, together with its wholly owned subsidiaries T-Mobile Global Zwischenholding GmbH, T-Mobile Global Holding GmbH and Deutsche Telekom Holding B.V., reported aggregate beneficial ownership of 592,065,875 shares of T-Mobile US, Inc. common stock, equal to approximately 53.7 percent of the shares outstanding. Of this total, 582,065,875 shares were held directly by Deutsche Telekom Holding B.V., with a further 10,000,000 shares held by Signal Bright subject to a proxy arrangement in Deutsche Telekom AG’s favor.

Other significant institutional shareholders disclosed in SEC Schedule 13G filings include The Vanguard Group, Inc., which reported a holding of approximately 3.8 percent of the common stock as of the first quarter of 2026, following a January 2026 change in how Vanguard entities report their positions, and BlackRock, Inc., which reported a holding of approximately 3.7 percent in a Schedule 13G/A filed in August 2026. These are index-fund and asset-management positions rather than strategic or controlling stakes.

No ultimate beneficial owner who is a natural person has been identified for T-Mobile US, Inc. Its controlling shareholder, Deutsche Telekom AG, is itself a publicly listed company with a broad shareholder base, and no complete ownership chain to an individual has been identified from official sources.

Shareholder information for T-Mobile US, Inc. is best treated as major shareholders only, current as of the filing dates stated above; smaller holdings and any changes since those dates are not reflected.

T-Mobile US, Inc. discloses its executive officers each year in the proxy statement it files with the U.S. Securities and Exchange Commission. According to the company’s 2026 annual meeting proxy statement, its executive officers were Srinivasan Gopalan (President and Chief Executive Officer), Peter Osvaldik (Chief Financial Officer), Jonathan A. Freier (Chief Operating Officer), Andre Almeida (Chief Broadband, Enterprise and Emerging Business Officer), Michael J. Katz (Chief Business and Product Officer), Deeanne King (Chief People Officer), Mark W. Nelson (Chief Legal Officer and General Counsel) and John Saw (Chief Technology Officer), all reported as active as of the proxy’s record date. Mr. Gopalan also serves as a director of the company.

Several of these roles have since changed. Effective November 1, 2025, Srinivasan Gopalan succeeded Mike Sievert as President and Chief Executive Officer; Mr. Sievert moved into a newly created Vice Chairman position, remaining on the board in an advisory management capacity. Effective July 8, 2026, Michael J. Katz stepped down as Chief Business and Product Officer after more than two decades with the company, remaining as a strategic advisor through December 2026; in the same announcement, Andre Almeida moved into the role of Chief Marketing, Brand and Broadband Officer, and Chris Sambar was appointed Chief Enterprise Officer, effective no later than October 14, 2026, reporting to Mr. Gopalan. On September 3, 2026, the company announced that Jessica Uhl would join as Chief Financial Officer Designate and succeed Peter Osvaldik as Chief Financial Officer in February 2027, with Mr. Osvaldik continuing as a strategic advisor ahead of a planned retirement on July 1, 2027.

Officer nationality and country of residence are not disclosed in T-Mobile US, Inc.’s SEC filings, and no authoritative source reviewed reports these details for the company’s officers; they should be treated as not disclosed rather than inferred from names, roles or business addresses. The information above reflects the company’s most recent proxy statement together with subsequent SEC filings and company announcements through September 2026, and it may not capture changes after that date.

T-Mobile US, Inc. is not an independent company. It is majority owned and controlled by Deutsche Telekom AG, a German company listed on the Frankfurt Stock Exchange, which is its verified ultimate parent. Deutsche Telekom AG’s stake is held through a chain of wholly owned subsidiaries: T-Mobile Global Zwischenholding GmbH, then T-Mobile Global Holding GmbH, then Deutsche Telekom Holding B.V., a Netherlands company that is the direct, immediate parent holding the shares of record. In a Schedule 13D/A filed with the U.S. Securities and Exchange Commission on March 23, 2026 (event date March 19, 2026), this group reported aggregate beneficial ownership of approximately 53.7 percent of T-Mobile US, Inc.’s outstanding common stock, comprising 592,065,875 shares, of which 582,065,875 were held directly by Deutsche Telekom Holding B.V. and 10,000,000 by Signal Bright under a proxy arrangement.

T-Mobile US, Inc. also has numerous verified direct and indirect subsidiaries, listed in Exhibit 21.1 to its Form 10-K for the year ended December 31, 2025, filed with the SEC. These include operating entities carrying the MetroPCS, Mint Mobile and Sprint brands, reflecting businesses that T-Mobile US, Inc. has acquired and integrated over time, together with other wholly or majority owned operating subsidiaries. The exhibit itself notes that certain smaller subsidiaries are omitted where they would not, in the aggregate, be significant, so it is not a complete corporate register.

Since around April 2026, Deutsche Telekom AG has reportedly been exploring a full combination with T-Mobile US, Inc. that would bring the remaining publicly held shares under Deutsche Telekom AG’s ownership, in a transaction reported by financial media to be valued near 300 billion US dollars. As of the most recent reporting reviewed, from around July 2026, this remained a proposed transaction under discussion, with some T-Mobile US, Inc. executives and minority shareholders reported to have raised objections, rather than a completed or agreed corporate change. This should be treated as a possible future relationship, not a verified current change to the group structure.

Group-structure information for T-Mobile US, Inc. is best described as partial: parent-level ownership is well documented through SEC beneficial-ownership filings, but the full population of its direct and indirect subsidiaries is not exhaustively disclosed in any single public source.