T-Mobile US, Inc.
US ˙ NasdaqGS ˙ US8725901040

SecurityTMUS / T-Mobile US, Inc.
InstitutionConning Inc.
Latest Disclosed Ownership2,175 shares
Latest Disclosed Value $ 456,814
Conning Inc. reports 14.87% decrease in ownership of TMUS / T-Mobile US, Inc.

On April 30, 2026 - Conning Inc. filed a 13F-HR form disclosing ownership of 2,175 shares of T-Mobile US, Inc. (US:TMUS) valued at $456,815 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 2,555 shares of T-Mobile US, Inc.. This represents a change in shares of -14.87% during the quarter. The current value of the position is $394,654 USD.

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)
2026-04-30 2026-03-31 13F T-MOBILE US COM 872590104 2,175 -380 -14.87 457 -11.97 0.0152
2026-02-05 2025-12-31 13F T-MOBILE US COM 872590104 2,555 144 5.97 519 -10.23 0.0174
2025-10-28 2025-09-30 13F T-MOBILE US COM 872590104 2,411 0 0.00 577 0.52 0.0192
2025-07-24 2025-06-30 13F T-MOBILE US COM 872590104 2,411 -135 -5.30 574 -15.46 0.0197
2025-04-29 2025-03-31 13F T-MOBILE US COM 872590104 2,546 227 9.79 679 32.88 0.0238
2025-01-28 2024-12-31 13F T-MOBILE US COM 872590104 2,319 -611 -20.85 512 -15.40 0.0179
2024-10-29 2024-09-30 13F T-MOBILE US COM 872590104 2,930 -44 -1.48 605 15.49 0.0200
2024-07-26 2024-06-30 13F T-MOBILE US COM 872590104 2,974 128 4.50 524 12.72 0.0189
2024-04-26 2024-03-31 13F T-MOBILE US COM 872590104 2,846 1 0.04 465 1.75 0.0152
2024-01-30 2023-12-31 13F T-MOBILE US COM 872590104 2,845 -20 -0.70 456 13.72 0.0159
2023-10-26 2023-09-30 13F T-MOBILE US COM 872590104 2,865 -60 -2.05 401 -1.23 0.0146
2023-07-21 2023-06-30 13F T-MOBILE US COM 872590104 2,925 -1,221 -29.45 406 -32.33 0.0136
2023-04-27 2023-03-31 13F T-MOBILE US COM 872590104 4,146 -40 -0.96 601 2.39 0.0201
2023-02-08 2022-12-31 13F T-MOBILE US COM 872590104 4,186 -22 -0.52 586 3.72 0.0190
2022-10-31 2022-09-30 13F T-MOBILE US COM 872590104 4,208 -283 -6.30 565 -6.46 0.0201
2022-07-20 2022-06-30 13F T-MOBILE US COM 872590104 4,491 -34 -0.75 604 3.96 0.0181
2022-05-02 2022-03-31 13F T-MOBILE US COM 872590104 4,525 121 2.75 581 13.70 0.0158
2022-01-27 2021-12-31 13F T-MOBILE US COM 872590104 4,404 407 10.18 511 0.00 0.0136
2021-11-05 2021-09-30 13F T-MOBILE US COM 872590104 3,997 -1,960 -32.90 511 -40.79 0.0147
2021-07-29 2021-06-30 13F T-MOBILE US COM 872590104 5,957 -1,008 -14.47 863 -1.15 0.0250
2021-04-23 2021-03-31 13F T-MOBILE US COM 872590104 6,965 -490 -6.57 873 -13.13 0.0263
2021-01-28 2020-12-31 13F T-MOBILE US COM 872590104 7,455 2,040 37.67 1,005 62.36 0.0319
2020-10-21 2020-09-30 13F T-MOBILE US COM 872590104 5,415 1,020 23.21 619 35.15 0.0218
2020-08-07 2020-06-30 13F T-MOBILE US COM 872590104 4,395 827 23.18 458 53.18 0.0170
2020-04-29 2020-03-31 13F T MOBILE US COM 872590104 3,568 889 33.18 299 42.38 0.0127
2020-01-29 2019-12-31 13F T MOBILE US COM 872590104 2,679 2,679 210 0.0069
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.