Andreas Halvorsen's TMO Position Overview
Andreas Halvorsen (via Viking Global Investors Lp) currently holds 793,187 shares of Thermo Fisher Scientific Inc. (TMO) worth $459.61 M, representing 1.22% of the portfolio. First purchased in 2013-Q2, this long-term strategic position has been held for 35 quarters.
Based on 13F filings, Andreas Halvorsen has maintained a strategic position in TMO, demonstrating sustained confidence in this investment. Largest addition occurred in Q3 2013, adding 1.88 M shares. Largest reduction occurred in Q2 2015, reducing 3.32 M shares.
Analysis based on 13F filings available since 2013 Q2
Andreas Halvorsen's Thermo Fisher Scientific (TMO) Holding Value Over Time
Track share changes against reported price movement
Quarterly Thermo Fisher Scientific (TMO) Trades by Andreas Halvorsen
| Report Date | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q4 2025 | +793,187 | New Buy | 793,187 | $579.45 |
| Q2 2024 | -128,489 | Sold Out | 0 | $0.00 |
| Q1 2024 | -409,996 | Reduce 76.14% | 128,489 | $581.21 |
| Q4 2023 | -361,230 | Reduce 40.15% | 538,485 | $530.79 |
| Q3 2023 | +66,482 | Add 7.98% | 899,715 | $506.17 |
| Q2 2023 | -23,603 | Reduce 2.75% | 833,233 | $521.75 |
| Q1 2023 | +17,310 | Add 2.06% | 856,836 | $576.37 |
| Q4 2022 | +245,989 | Add 41.44% | 839,526 | $550.69 |
| Q3 2022 | -269,050 | Reduce 31.19% | 593,537 | $507.19 |
| Q2 2022 | +377,891 | Add 77.96% | 862,587 | $543.28 |
| Q1 2022 | +273,638 | Add 129.65% | 484,696 | $590.65 |
| Q4 2021 | +28,821 | Add 15.82% | 211,058 | $667.24 |
| Q3 2021 | -829,164 | Reduce 81.98% | 182,237 | $571.33 |
| Q2 2021 | +149,514 | Add 17.35% | 1.01 M | $504.47 |
| Q1 2021 | +784,070 | Add 1007.58% | 861,887 | $456.38 |
| Q4 2020 | -1.3 M | Reduce 94.35% | 77,817 | $465.79 |
| Q3 2020 | -356,921 | Reduce 20.58% | 1.38 M | $441.52 |
| Q2 2020 | +1.73 M | New Buy | 1.73 M | $362.34 |
| Q2 2019 | -1.15 M | Sold Out | 0 | $0.00 |
| Q1 2019 | +598,131 | Add 109.17% | 1.15 M | $273.72 |
| Q4 2018 | -1.33 M | Reduce 70.82% | 547,906 | $223.79 |
| Q3 2018 | -602,542 | Reduce 24.29% | 1.88 M | $244.08 |
| Q2 2018 | +1.62 M | Add 186.85% | 2.48 M | $207.14 |
| Q1 2018 | +50,164 | Add 6.16% | 864,681 | $206.46 |
| Q4 2017 | +814,517 | New Buy | 814,517 | $189.88 |
| Q3 2015 | -207,527 | Sold Out | 0 | $0.00 |
| Q2 2015 | -3.32 M | Reduce 94.12% | 207,527 | $129.76 |
| Q1 2015 | -2.25 M | Reduce 38.96% | 3.53 M | $134.34 |
| Q4 2014 | -2.19 M | Reduce 27.46% | 5.79 M | $125.29 |
| Q3 2014 | -294,778 | Reduce 3.56% | 7.98 M | $121.70 |
| Q2 2014 | -1.4 M | Reduce 14.45% | 8.27 M | $118.00 |
| Q1 2014 | -707,017 | Reduce 6.81% | 9.67 M | $120.24 |
| Q4 2013 | -195,114 | Reduce 1.85% | 10.38 M | $111.35 |
| Q3 2013 | +1.88 M | Add 21.65% | 10.57 M | $92.15 |
| Q2 2013 | +8.69 M | Add 0.00% | 8.69 M | $84.63 |
Andreas Halvorsen's Thermo Fisher Scientific Investment FAQs
Andreas Halvorsen first purchased Thermo Fisher Scientific Inc. (TMO) in Q2 2013, acquiring 8,689,600 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 Thermo Fisher Scientific Inc. (TMO) for 35 quarters since Q2 2013.
Andreas Halvorsen's largest addition to Thermo Fisher Scientific Inc. (TMO) was in Q2 2013, adding 8,689,600 shares worth $735.4 M.
According to the latest 13F filing for Q4 2025, Andreas Halvorsen's firm, Viking Global Investors Lp, owns 793,187 shares of Thermo Fisher Scientific Inc. (TMO), valued at approximately $459.61 M.
As of the Q4 2025 filing, Thermo Fisher Scientific Inc. (TMO) represents approximately 1.22% of Andreas Halvorsen's publicly disclosed stock portfolio, making it one of their key holdings.
Andreas Halvorsen's peak holding in Thermo Fisher Scientific Inc. (TMO) was 10,570,770 shares, as reported at the end of Q3 2013.