T-Mobile US, Inc.
MX ˙ BMV ˙ US8725901040
SecurityMX:TMUS / T-Mobile US, Inc.
InstitutionAviva Plc
Latest Disclosed Ownership724,936 shares
Latest Disclosed Value $ 152,258,308
Aviva Plc reports 10.72% increase in ownership of TMUS / T-Mobile US, Inc.

On May 14, 2026 - Aviva Plc filed a 13F-HR form disclosing ownership of 724,936 shares of T-Mobile US, Inc. (MX:TMUS) valued at $152,258,308 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 654,746 shares of T-Mobile US, Inc.. This represents a change in shares of 10.72% 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 724,936 70,190 10.72 152,258 14.53 0.2554
2026-02-12 2025-12-31 13F T-MOBILE US COM 872590104 654,746 40,286 6.56 132,940 -9.62 0.2242
2025-11-13 2025-09-30 13F T-MOBILE US COM 872590104 614,460 40,575 7.07 147,089 7.57 0.2673
2025-08-07 2025-06-30 13F T-MOBILE US COM 872590104 573,885 100,289 21.18 136,734 8.25 0.2824
2025-05-15 2025-03-31 13F T-MOBILE US COM 872590104 473,596 49,772 11.74 126,313 35.02 0.3048
2025-02-13 2024-12-31 13F T-MOBILE US COM 872590104 423,824 102,413 31.86 93,551 41.05 0.2430
2024-11-14 2024-09-30 13F T-MOBILE US COM 872590104 321,411 27,308 9.29 66,326 28.01 0.1718
2024-08-02 2024-06-30 13F T-MOBILE US COM 872590104 294,103 33,435 12.83 51,815 21.79 0.1436
2024-05-14 2024-03-31 13F T-MOBILE US COM 872590104 260,668 20,715 8.63 42,546 10.59 0.1401
2024-02-09 2023-12-31 13F T-MOBILE US COM 872590104 239,953 10,910 4.76 38,472 19.93 0.1379
2023-11-13 2023-09-30 13F T-MOBILE US COM 872590104 229,043 -61,963 -21.29 32,077 -20.64 0.1349
2023-08-10 2023-06-30 13F T-MOBILE US COM 872590104 291,006 -84,596 -22.52 40,421 -25.70 0.1646
2023-05-12 2023-03-31 13F T-MOBILE US COM 872590104 375,602 -45,639 -10.83 54,402 -7.75 0.2463
2023-02-14 2022-12-31 13F/A-2 T-MOBILE US COM 872590104 421,241 83,967 24.90 58,974 30.32 0.2900
2023-02-10 2022-12-31 13F/A-1 T-MOBILE US COM 872590104 421,241 83,967 13,626 0.0650
2023-02-09 2022-12-31 13F T-MOBILE US COM 872590104 421,241 83,967 59 0.2833
2022-11-14 2022-09-30 13F T-MOBILE US COM 872590104 337,274 62,238 22.63 45,252 22.29 0.2608
2022-08-04 2022-06-30 13F T-MOBILE US COM 872590104 275,036 61,725 28.94 37,003 35.16 0.1969
2022-05-13 2022-03-31 13F T-MOBILE US COM 872590104 213,311 20,166 10.44 27,378 22.22 0.1369
2022-02-10 2021-12-31 13F T-MOBILE US COM 872590104 193,145 10,397 5.69 22,401 -4.06 0.0939
2021-11-12 2021-09-30 13F T-MOBILE US COM 872590104 182,748 -9,484 -4.93 23,348 -16.14 0.1041
2021-08-10 2021-06-30 13F T-MOBILE US COM 872590104 192,232 6,416 3.45 27,841 19.59 0.1221
2021-05-13 2021-03-31 13F T-MOBILE US COM 872590104 185,816 766 0.41 23,281 -6.70 0.1137
2021-02-10 2020-12-31 13F T-MOBILE US COM 872590104 185,050 4,844 2.69 24,954 21.09 0.1298
2020-11-12 2020-09-30 13F T-MOBILE US COM 872590104 180,206 9,820 5.76 20,608 16.13 0.1216
2020-08-13 2020-06-30 13F/A-1 T-MOBILE US COM 872590104 170,386 -128,215 -42.94 17,746 -29.17 0.1106
2020-08-13 2020-06-30 13F T-MOBILE US COM 872590104 170,386 -128,215 17,746 53,724.7532
2020-05-14 2020-03-31 13F T MOBILE US COM 872590104 298,601 -38,278 -11.36 25,053 -5.17 0.1835
2020-02-10 2019-12-31 13F T MOBILE US COM 872590104 336,879 -120,246 -26.30 26,418 -26.63 0.1600
2019-11-12 2019-09-30 13F T MOBILE US COM 872590104 457,125 -7,354 -1.58 36,008 4.56 0.2440
2019-07-30 2019-06-30 13F T MOBILE US COM 872590104 464,479 -2,881 -0.62 34,436 6.63 0.2365
2019-05-14 2019-03-31 13F T MOBILE US COM 872590104 467,360 1,023 0.22 32,294 8.87 0.2166
2019-02-12 2018-12-31 13F T MOBILE US COM 872590104 466,337 -28,433 -5.75 29,664 -14.57 0.2212
2018-11-13 2018-09-30 13F T MOBILE US COM 872590104 494,770 99,077 25.04 34,723 46.86 0.1904
2018-08-01 2018-06-30 13F T MOBILE US COM 872590104 395,693 78,139 24.61 23,643 21.97 0.1395
2018-05-14 2018-03-31 13F T MOBILE US COM 872590104 317,554 -12,201 -3.70 19,384 -7.44 0.1185
2018-02-13 2017-12-31 13F T MOBILE US COM 872590104 329,755 -16,315 -4.71 20,942 -1.87 0.1186
2017-11-13 2017-09-30 13F T MOBILE US COM 872590104 346,070 27,915 8.77 21,342 10.67 0.1148
2017-08-07 2017-06-30 13F T MOBILE US COM 872590104 318,155 51,430 19.28 19,284 11.91 0.1078
2017-05-15 2017-03-31 13F T MOBILE US COM 872590104 266,725 94,728 55.08 17,231 74.14 0.0986
2017-02-13 2016-12-31 13F T MOBILE US COM 872590104 171,997 10,117 6.25 9,895 30.80 0.0591
2016-11-14 2016-09-30 13F T MOBILE US COM 872590104 161,880 3,675 2.32 7,565 10.50 0.0472
2016-08-05 2016-06-30 13F T MOBILE US COM 872590104 158,205 24,508 18.33 6,846 33.68 0.0469
2016-05-12 2016-03-31 13F T MOBILE US COM 872590104 133,697 678 0.51 5,121 -1.59 0.0381
2016-02-11 2015-12-31 13F T MOBILE US COM 872590104 133,019 330 0.25 5,204 -1.48 0.0395
2015-11-12 2015-09-30 13F T MOBILE US COM 872590104 132,689 -2,285 -1.69 5,282 0.94 0.0438
2015-08-06 2015-06-30 13F T MOBILE US COM 872590104 134,974 -2,080 -1.52 5,233 20.49 0.0370
2015-05-14 2015-03-31 13F T MOBILE US COM 872590104 137,054 137,054 0.00 4,343 0.0298
2015-02-05 2014-12-31 13F/A-1 T-MOBILE US COM 872590104 0 -105,264 -100.00 0 -100.00
2014-11-13 2014-09-30 13F T-MOBILE US COM 872590104 105,264 -360 -0.34 3,039 -14.42 0.0241
2014-08-13 2014-06-30 13F T-MOBILE US COM 872590104 105,624 -240 -0.23 3,551 1.54 0.0271
2014-05-14 2014-03-31 13F T-MOBILE US COM 872590104 105,864 21,390 25.32 3,497 23.05 0.0283
2014-02-13 2013-12-31 13F T-MOBILE US COM 872590104 84,474 22,813 37.00 2,842 77.51 0.0238
2013-11-13 2013-09-30 13F T-MOBILE US COM 872590104 61,661 19,612 46.64 1,601 53.50 0.0140
2013-08-01 2013-06-30 13F T-MOBILE US COM 872590104 42,049 42,049 1,043 0.0105
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.