T-Mobile US, Inc.
MX ˙ BMV ˙ US8725901040
SecurityMX:TMUS / T-Mobile US, Inc.
InstitutionArgent Trust Co
Latest Disclosed Ownership3,574 shares
Latest Disclosed Value $ 750,648
Argent Trust Co reports 19.29% decrease in ownership of TMUS / T-Mobile US, Inc.

On May 13, 2026 - Argent Trust Co filed a 13F-HR form disclosing ownership of 3,574 shares of T-Mobile US, Inc. (MX:TMUS) valued at $750,648 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 4,428 shares of T-Mobile US, Inc.. This represents a change in shares of -19.29% 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)
2026-05-13 2026-03-31 13F T-MOBILE US INC COM COMMON STOCK 872590104 3,574 -854 -19.29 751 -16.57 0.0099
2026-02-10 2025-12-31 13F T-MOBILE US INC COM COMMON STOCK 872590104 4,428 -1,013 -18.62 899 -30.95 0.0308
2025-11-12 2025-09-30 13F T-MOBILE US INC COM COMMON STOCK 872590104 5,441 539 11.00 1,302 11.57 0.0462
2025-08-12 2025-06-30 13F T-MOBILE US INC COM COMMON STOCK 872590104 4,902 92 1.91 1,168 -8.97 0.0441
2025-05-09 2025-03-31 13F T-MOBILE US INC COM COMMON STOCK 872590104 4,810 -298 -5.83 1,283 13.75 0.0527
2025-02-13 2024-12-31 13F T-MOBILE US INC COM COMMON STOCK 872590104 5,108 -200 -3.77 1,127 2.92 0.0460
2024-11-13 2024-09-30 13F T-MOBILE US INC COM COMMON STOCK 872590104 5,308 -227 -4.10 1,095 12.31 0.0453
2024-08-12 2024-06-30 13F T-MOBILE US INC COM COMMON STOCK 872590104 5,535 129 2.39 975 10.54 0.0429
2024-05-10 2024-03-31 13F T-MOBILE US INC COM COMMON STOCK 872590104 5,406 294 5.75 882 7.69 0.0397
2024-02-09 2023-12-31 13F T-MOBILE US INC COM COMMON STOCK 872590104 5,112 -315 -5.80 820 7.76 0.0408
2023-11-08 2023-09-30 13F T-MOBILE US INC COM COMMON STOCK 872590104 5,427 263 5.09 760 6.00 0.0417
2023-08-11 2023-06-30 13F T-MOBILE US INC COM COMMON STOCK 872590104 5,164 3,039 143.01 717 133.55 0.0389
2023-05-12 2023-03-31 13F T-MOBILE US INC COM COMMON STOCK 872590104 2,125 173 8.86 308 12.45 0.0195
2023-02-10 2022-12-31 13F T-MOBILE US INC COM COMMON STOCK 872590104 1,952 -201 -9.34 273 -5.54 0.0181
2022-11-10 2022-09-30 13F T-MOBILE US INC COM COMMON STOCK 872590104 2,153 -73 -3.28 289 -3.34 0.0209
2022-08-11 2022-06-30 13F T-MOBILE US INC COM COMMON STOCK 872590104 2,226 -39 -1.72 299 2.75 0.0205
2022-05-11 2022-03-31 13F T-MOBILE US INC COM COMMON STOCK 872590104 2,265 2,265 291 0.0177
2021-11-09 2021-09-30 13F T-MOBILE US INC COM COMMON STOCK 872590104 0 -1,497 -100.00 0 -100.00
2021-08-09 2021-06-30 13F T-MOBILE US INC COM COMMON STOCK 872590104 1,497 1,497 216 0.0142
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.