Andreas Halvorsen's TMUS Position Overview
Andreas Halvorsen (via Viking Global Investors Lp) currently holds 3.26 M shares of T-Mobile US, Inc. (TMUS) worth $780.97 M, representing 2.03% of the portfolio. First purchased in 2015-Q1, this long-term strategic position has been held for 43 quarters.
Based on 13F filings since 2013, Andreas Halvorsen has maintained a long-term strategic position in TMUS, representing a significant commitment to this investment thesis. Largest addition occurred in Q2 2016, adding 11.29 M shares. Largest reduction occurred in Q3 2022, reducing 5.85 M shares.
Analysis based on 13F filings available since 2013 Q2
Andreas Halvorsen's T-Mobile US (TMUS) Holding Value Over Time
Track share changes against reported price movement
Quarterly T-Mobile US (TMUS) Trades by Andreas Halvorsen
| Period | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q1 2015 | +7.99 M | New Buy | 7.99 M | $31.69 |
| Q2 2015 | -7.99 M | Sold Out | 7.99 M | $0.00 |
| Q1 2016 | +2.68 M | New Buy | 2.68 M | $38.30 |
| Q2 2016 | +11.29 M | Add 420.94% | 13.97 M | $43.27 |
| Q3 2016 | -210,391 | Reduce 1.51% | 13.76 M | $46.72 |
| Q4 2016 | -5.35 M | Reduce 38.87% | 8.41 M | $57.51 |
| Q1 2017 | -8.41 M | Sold Out | 8.41 M | $0.00 |
| Q2 2018 | +3.22 M | New Buy | 3.22 M | $59.75 |
| Q3 2018 | -296,635 | Reduce 9.22% | 2.92 M | $70.18 |
| Q4 2018 | +531,503 | Add 18.19% | 3.45 M | $63.61 |
| Q1 2019 | -3.45 M | Sold Out | 3.45 M | $0.00 |
| Q1 2020 | +1.25 M | New Buy | 1.25 M | $83.90 |
| Q2 2020 | +2.55 M | Add 203.02% | 3.8 M | $104.15 |
| Q3 2020 | +4.27 M | Add 112.40% | 8.07 M | $114.36 |
| Q4 2020 | +635,362 | Add 7.87% | 8.71 M | $134.85 |
| Q1 2021 | +1.58 M | Add 18.15% | 10.29 M | $125.29 |
| Q2 2021 | -2.74 M | Reduce 26.67% | 7.54 M | $144.83 |
| Q3 2021 | +2.68 M | Add 35.57% | 10.23 M | $127.76 |
| Q4 2021 | +2.92 M | Add 28.59% | 13.15 M | $115.98 |
| Q1 2022 | +269,888 | Add 2.05% | 13.42 M | $128.35 |
| Q2 2022 | -4.25 M | Reduce 31.66% | 9.17 M | $134.54 |
| Q3 2022 | -5.85 M | Reduce 63.75% | 3.32 M | $134.17 |
| Q4 2022 | -3.32 M | Sold Out | 3.32 M | $0.00 |
| Q4 2023 | +1.51 M | New Buy | 1.51 M | $160.33 |
| Q1 2024 | +2.87 M | Add 190.15% | 4.38 M | $163.22 |
| Q2 2024 | -1.89 M | Reduce 43.10% | 2.49 M | $176.18 |
| Q3 2024 | -1.34 M | Reduce 53.84% | 1.15 M | $206.36 |
| Q4 2024 | -540,334 | Reduce 46.96% | 610,404 | $220.73 |
| Q1 2025 | +955,490 | Add 156.53% | 1.57 M | $266.71 |
| Q2 2025 | +1.28 M | Add 81.71% | 2.85 M | $238.26 |
| Q3 2025 | +417,150 | Add 14.66% | 3.26 M | $239.38 |
Andreas Halvorsen's T-Mobile US Investment FAQs
Andreas Halvorsen first purchased T-Mobile US, Inc. (TMUS) in Q1 2015, acquiring 7,994,880 shares, as reported in their 13F filing for that period. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
Andreas Halvorsen has held T-Mobile US, Inc. (TMUS) for 43 quarters since Q1 2015. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
Andreas Halvorsen's largest addition to T-Mobile US, Inc. (TMUS) was in Q2 2016, adding 13,966,540 shares worth $604.33 M. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
According to the latest 13F filing for Q3 2025, Andreas Halvorsen's firm, Viking Global Investors Lp, owns 3,262,466 shares of T-Mobile US, Inc. (TMUS), valued at approximately $780.97 M. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
As of the Q3 2025 filing, T-Mobile US, Inc. (TMUS) represents approximately 2.03% of Andreas Halvorsen's publicly disclosed stock portfolio, making it one of their key holdings. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
Andreas Halvorsen's peak holding in T-Mobile US, Inc. (TMUS) was 13,966,540 shares, as reported at the end of Q2 2016. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.