T-Mobile US, Inc. (TMUS)

Corporate structure

135 entities across 20 jurisdictions. Read directly from the company’s own 10-K EX-21 filed 2026-02-11 — see the exhibit.

Financial health

Two standard screens, computed from the XBRL in FY2025 against FY2024. Every test shows the numbers behind it — a score with its inputs hidden is a number you cannot check.

Six-year record

Ownership flow

15 institutions tracked — 8 added, 6 reduced, 1 opened a new position, 1 sold out. Index money added 2,012,520 shares while active managers cut 14,685,877.

NORGES BANK holds a position with no prior filing to compare against, so its change is unknown rather than zero — and it is left out of the totals above.

From 13F filings, which cover institutions managing over $100m and are filed up to 45 days after the quarter ends — so this is a considered position, not a live one, and it is not the whole shareholder register.

Capital returned

What the company actually paid out and bought back, as reported — the record behind any yield figure.

Related companies

Companies filing in the same SEC industry group.

Dealer positioning — end of day

Where dealer gamma sat in TMUS’s option chain after the close on 2026-09-01, aggregated from the full chain. This is a once-a-day snapshot, not a live read — 726 contracts.

Net gamma (per 1% move)

$13.4M

Gamma flip

195

Call wall

195

Put wall

180

Spot at capture

180.44

Computed from the listed option chain by my own aggregation, once, after the close — it describes where positioning sat that evening and does not update through the next session. The version that rebuilds per strike while the market is open is the intraday gamma product. Not investment advice.

Questions about T-Mobile US, Inc.

How many subsidiaries does T-Mobile US, Inc. file with the SEC?

135, listed in its most recent exhibit 21. They are incorporated across 20 jurisdictions, led by Delaware, India, Spain. That exhibit is filed with the company's annual report and is the company's own list, not an estimate.

Is T-Mobile US, Inc. financially healthy?

T-Mobile US, Inc. scores 6 out of 8 on the Piotroski F-score. Only 8 of the nine tests could be computed from what it filed; the rest need a prior year it has not reported. Every test and the numbers behind it are shown above, so the arithmetic is checkable rather than something you have to take on trust.

Who are the largest institutional holders of T-Mobile US, Inc.?

Among the managers tracked here, the biggest positions as of the 2026-Q2 13F filings are BlackRock, Inc. (adding), PRICE T ROWE ASSOCIATES INC /MD/ (trimming), STATE STREET CORP (adding). Direction is the change in share count against that manager's own previous filing; managers with no prior filing are left out rather than counted as new buyers.