T-Mobile US, Inc.
MX ˙ BMV ˙ US8725901040
SecurityMX:TMUS / T-Mobile US, Inc.
InstitutionSolstein Capital, LLC
Latest Disclosed Ownership1,974 shares
Latest Disclosed Value $ 414,599
Solstein Capital, LLC reports 7.93% decrease in ownership of TMUS / T-Mobile US, Inc.

On May 14, 2026 - Solstein Capital, LLC filed a 13F-HR form disclosing ownership of 1,974 shares of T-Mobile US, Inc. (MX:TMUS) valued at $414,599 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 2,144 shares of T-Mobile US, Inc.. This represents a change in shares of -7.93% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-05-14 2026-03-31 13F T-MOBILE US COM 872590104 1,974 -170 -7.93 415 -4.83 0.1702
2026-02-13 2025-12-31 13F T-MOBILE US COM 872590104 2,144 -316 -12.85 435 -26.02 0.1746
2025-11-12 2025-09-30 13F T-MOBILE US COM 872590104 2,460 -25 -1.01 589 -0.68 0.1336
2025-08-01 2025-06-30 13F T-MOBILE US COM 872590104 2,485 164 7.07 592 -4.36 0.3039
2025-04-17 2025-03-31 13F T-MOBILE US COM 872590104 2,321 0 0.00 619 20.90 0.3602
2025-02-13 2024-12-31 13F T-MOBILE US COM 872590104 2,321 0 0.00 512 7.11 0.2863
2024-10-29 2024-09-30 13F T-MOBILE US COM 872590104 2,321 0 0.00 479 17.16 0.2537
2024-07-26 2024-06-30 13F T-MOBILE US COM 872590104 2,321 0 0.00 409 7.94 0.2668
2024-04-24 2024-03-31 13F T-MOBILE US COM 872590104 2,321 0 0.00 379 1.61 0.2626
2024-01-23 2023-12-31 13F T-MOBILE US COM 872590104 2,321 0 0.00 372 14.46 0.2753
2023-10-25 2023-09-30 13F T-MOBILE US COM 872590104 2,321 0 0.00 325 0.93 0.2794
2023-07-27 2023-06-30 13F T-MOBILE US COM 872590104 2,321 0 0.00 322 -4.17 0.2687
2023-04-19 2023-03-31 13F T-MOBILE US COM 872590104 2,321 0 0.00 336 3.70 0.2925
2023-02-02 2022-12-31 13F T-MOBILE US COM 872590104 2,321 -682 -22.71 325 -19.60 0.2718
2022-11-01 2022-09-30 13F T-MOBILE US COM 872590104 3,003 0 0.00 403 -0.25 0.3550
2022-08-09 2022-06-30 13F T-MOBILE US COM 872590104 3,003 0 0.00 404 4.94 0.3093
2022-05-05 2022-03-31 13F T-MOBILE US COM 872590104 3,003 -1,400 -31.80 385 -24.66 0.2537
2022-01-27 2021-12-31 13F T-MOBILE US COM 872590104 4,403 -3,249 -42.46 511 -47.75 0.3080
2021-10-27 2021-09-30 13F T-MOBILE US COM 872590104 7,652 3,059 66.60 978 47.07 0.5613
2021-08-12 2021-06-30 13F T-MOBILE US INC COM COM 872590104 4,593 62 1.37 665 17.08 0.8189
2021-05-13 2021-03-31 13F T-Mobile US COM 872590104 4,531 -43 -0.94 568 -7.79 0.7724
2021-02-11 2020-12-31 13F T-Mobile US Common 872590104 4,574 1,243 37.32 616 61.68 0.2538
2020-11-12 2020-09-30 13F T-Mobile US Common 872590104 3,331 0 0.00 381 9.48 0.8534
2020-08-12 2020-06-30 13F T-Mobile US Common 872590104 3,331 3,125 1,516.99 348 1,947.06 0.8262
2020-05-12 2020-03-31 13F T-Mobile US Common 872590104 206 0 0.00 17 6.25 0.0655
2020-02-12 2019-12-31 13F T-Mobile US Common 872590104 206 206 16 0.0322
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.