T-Mobile US, Inc.
MX ˙ BMV ˙ US8725901040
SecurityMX:TMUS / T-Mobile US, Inc.
InstitutionMackenzie Financial Corp
Latest Disclosed Ownership215,102 shares
Latest Disclosed Value $ 45,177,873
Mackenzie Financial Corp reports 19.36% increase in ownership of TMUS / T-Mobile US, Inc.

On May 13, 2026 - Mackenzie Financial Corp filed a 13F-HR form disclosing ownership of 215,102 shares of T-Mobile US, Inc. (MX:TMUS) valued at $45,177,873 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 18, 2026 disclosing 180,206 shares of T-Mobile US, Inc.. This represents a change in shares of 19.36% 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 COM 872590104 215,102 34,896 19.36 45,178 23.26 0.0542
2026-02-18 2025-12-31 13F T-MOBILE US COM 872590104 180,206 -128,014 -41.53 36,654 -50.32 0.0434
2025-11-13 2025-09-30 13F T-MOBILE US COM 872590104 308,220 -7,103 -2.25 73,782 -1.79 0.0894
2025-08-13 2025-06-30 13F T-MOBILE US COM 872590104 315,323 -17,678 -5.31 75,129 -15.41 0.0973
2025-05-07 2025-03-31 13F T-MOBILE US COM 872590104 333,001 -1,340 -0.40 88,815 20.35 0.1263
2025-05-02 2024-12-31 13F/A-2 T-MOBILE US COM 872590104 334,341 -73,841 -18.09 73,799 -12.39 0.1006
2025-02-20 2024-12-31 13F/A-1 T-MOBILE US COM 872590104 334,341 -73,841 73,799 0.0959
2025-02-14 2024-12-31 13F T-Mobile US Common Stock 872590104 334,341 -73,841 72,226 0.1037
2024-11-13 2024-09-30 13F T-MOBILE US COM 872590104 408,182 16,902 4.32 84,232 22.19 0.1172
2024-08-14 2024-06-30 13F T-MOBILE US COM 872590104 391,280 71,406 22.32 68,936 32.04 0.1024
2024-05-10 2024-03-31 13F T-MOBILE US COM 872590104 319,874 20,386 6.81 52,210 8.73 0.0752
2024-01-30 2023-12-31 13F T-MOBILE US COM 872590104 299,488 92,532 44.71 48,017 70.06 0.0724
2023-10-25 2023-09-30 13F T-MOBILE US COM 872590104 206,956 17,596 9.29 28,235 7.02 0.0475
2023-08-03 2023-06-30 13F T-MOBILE US COM 872590104 189,360 -236,901 -55.58 26,384 -57.27 0.0400
2023-04-24 2023-03-31 13F T-MOBILE US COM 872590104 426,261 -90,541 -17.52 61,740 -14.67 0.0954
2023-02-14 2022-12-31 13F T-MOBILE US COM 872590104 516,802 -2,340 -0.45 72,352 3.87 0.1209
2022-10-07 2022-09-30 13F T-Mobile US Common Stock 872590104 519,142 -34,499 -6.23 69,653 -6.49 0.1198
2022-08-10 2022-06-30 13F T-MOBILE US COM 872590104 553,641 183,688 49.65 74,487 56.87 0.1193
2022-05-13 2022-03-31 13F T-MOBILE US COM 872590104 369,953 64,627 21.17 47,483 34.09 0.0637
2022-02-14 2021-12-31 13F T-MOBILE US COM 872590104 305,326 30,169 10.96 35,412 0.73 0.0477
2021-11-08 2021-09-30 13F T-MOBILE US COM 872590104 275,157 31,373 12.87 35,154 -0.43 0.0499
2021-08-11 2021-06-30 13F T-MOBILE US COM 872590104 243,784 15,159 6.63 35,307 23.26 0.0491
2021-05-14 2021-03-31 13F T-MOBILE US COM 872590104 228,625 123,021 116.49 28,644 101.14 0.0437
2021-02-10 2020-12-31 13F T-MOBILE US COM 872590104 105,604 83,222 371.83 14,241 456.29 0.0308
2020-11-13 2020-09-30 13F T-MOBILE US COM 872590104 22,382 5,502 32.59 2,560 45.62 0.0064
2020-08-13 2020-06-30 13F T-MOBILE US COM 872590104 16,880 10,846 179.75 1,758 247.43 0.0047
2020-05-14 2020-03-31 13F T MOBILE US COM 872590104 6,034 964 19.01 506 27.14 0.0016
2020-02-13 2019-12-31 13F T MOBILE US COM 872590104 5,070 5,070 398 0.0010
2019-08-23 2019-06-30 13F/A-1 T MOBILE US COM 872590104 0 -56,041 -100.00 0 -100.00
2019-05-15 2019-03-31 13F T MOBILE US COM 872590104 56,041 -151,663 -73.02 3,872 -70.69 0.0093
2019-02-06 2018-12-31 13F T MOBILE US COM 872590104 207,704 186,235 867.46 13,212 776.71 0.0347
2018-11-15 2018-09-30 13F T MOBILE US COM 872590104 21,469 21,469 1,507 0.0037
2017-08-14 2017-06-30 13F T MOBILE US COM 872590104 0 -3,208 -100.00 0 -100.00
2017-05-25 2017-03-31 13F/A-1 T MOBILE US COM 872590104 3,208 -291 -8.32 207 2.99 0.0012
2017-05-12 2017-03-31 13F T MOBILE US COM 872590104 3,208 207
2017-02-14 2016-12-31 13F T MOBILE US COM 872590104 3,499 3,499 0.00 201 0.0012
2016-11-15 2016-09-30 13F T MOBILE US COM 872590104 0 -20,546 -100.00 0 -100.00
2016-08-12 2016-06-30 13F T MOBILE US COM 872590104 20,546 20,546 889 0.0050
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.