Andreas Halvorsen - Viking Global Investors
Period:    Q1 2026
Portfolio date:    31 Mar 2026
No. of stocks:    77
Portfolio value:    $35,748,670,967
Holdings Activity Buys Sells    History
Holding/activity history for  Thermo Fisher Scientific (TMO)
Period Shares % of Portfolio Activity % Change to Portfolio Reported Price Value Filing
2026   Q1 1,668,025 2.29 Add 110.29% 1.20 $491.53 $819,884,328 SEC
2025   Q4 793,187 1.22 Buy 1.22 $579.45 $459,612,207 SEC
2024   Q2 0 0.00 Sell 100.00% 0.28 SEC
2024   Q1 128,489 0.28 Reduce 76.14% 0.80 $581.21 $74,679,092 SEC
2023   Q4 538,485 1.05 Reduce 40.15% 0.74 $530.79 $285,822,453 SEC
2023   Q3 899,715 1.85 Add 7.98% 0.14 $506.17 $455,408,742 SEC
2023   Q2 833,233 1.79 Reduce 2.75% 0.06 $521.75 $434,739,318 SEC
2023   Q1 856,836 2.33 Add 2.06% 0.05 $576.37 $493,854,565 SEC
2022   Q4 839,526 2.32 Add 41.44% 0.68 $550.69 $462,318,573 SEC
2022   Q3 593,537 1.40 Reduce 31.19% 0.67 $507.19 $301,036,000 SEC
2022   Q2 862,587 2.15 Add 77.96% 0.94 $543.28 $468,626,000 SEC
2022   Q1 484,696 1.16 Add 129.65% 0.65 $590.65 $286,286,000 SEC
2021   Q4 211,058 0.41 Add 15.82% 0.06 $667.24 $140,826,000 SEC
2021   Q3 182,237 0.29 Reduce 81.98% 1.27 $571.33 $104,117,000 SEC
2021   Q2 1,011,401 1.55 Add 17.35% 0.23 $504.47 $510,221,000 SEC
2021   Q1 861,887 1.17 Add 1,007.58% 1.06 $456.38 $393,348,000 SEC
2020   Q4 77,817 0.10 Reduce 94.35% 2.08 $465.79 $36,246,000 SEC
2020   Q3 1,377,223 2.20 Reduce 20.58% 0.56 $441.52 $608,071,000 SEC
2020   Q2 1,734,144 2.72 Buy 2.72 $362.34 $628,350,000 SEC
2019   Q2 0 0.00 Sell 100.00% 1.80 SEC
2019   Q1 1,146,037 1.80 Add 109.17% 0.94 $273.72 $313,693,000 SEC
2018   Q4 547,906 0.71 Reduce 70.82% 1.87 $223.79 $122,616,000 SEC
2018   Q3 1,877,820 2.64 Reduce 24.29% 0.75 $244.08 $458,338,000 SEC
2018   Q2 2,480,362 3.09 Add 186.85% 2.01 $207.14 $513,782,000 SEC
2018   Q1 864,681 1.10 Add 6.16% 0.06 $206.46 $178,522,000 SEC
2017   Q4 814,517 0.98 Buy 0.98 $189.88 $154,660,000 SEC
2015   Q3 0 0.00 Sell 100.00% 0.11 SEC
2015   Q2 207,527 0.11 Reduce 94.12% 1.88 $129.76 $26,929,000 SEC
2015   Q1 3,531,837 2.00 Reduce 38.96% 1.48 $134.34 $474,467,000 SEC
2014   Q4 5,786,510 3.81 Reduce 27.46% 1.18 $125.29 $724,992,000 SEC
2014   Q3 7,976,502 4.31 Reduce 3.56% 0.17 $121.70 $970,740,000 SEC
2014   Q2 8,271,280 4.74 Reduce 14.45% 0.77 $118.00 $976,011,000 SEC
2014   Q1 9,668,639 5.32 Reduce 6.81% 0.40 $120.24 $1,162,557,000 SEC
2013   Q4 10,375,656 5.91 Reduce 1.85% 0.11 $111.35 $1,155,329,000 SEC
2013   Q3 10,570,770 6.00 Add 21.65% 1.07 $92.15 $974,096,000 SEC
2013   Q2 8,689,600 4.45 Buy 4.45 $84.63 $735,400,000 SEC
2012   Q4 0 0.00 Sell 100.00% 1.07 SEC
2012   Q3 1,899,646 1.07 Reduce 31.48% 0.51 $58.83 $111,756,000 SEC
2012   Q2 2,772,343 1.63 Add 57.22% 0.59 $51.91 $143,912,000 SEC
2012   Q1 1,763,385 1.21 Buy 1.21 $56.38 $99,419,000 SEC
2009   Q3 0 0.00 Sell 100.00% 1.48 SEC
2009   Q2 1,411,300 1.48 Reduce 2.74% 0.06 $40.77 $57,538,000 SEC
2009   Q1 1,451,000 2.09 Buy 2.09 $35.67 $51,757,000 SEC
2005   Q4 0 0.00 Sell 100.00% 0.41 SEC
2005   Q3 280,000 0.41 Reduce 29.11% 0.16 $30.90 $8,652,000 SEC
2005   Q2 395,000 0.54 Buy 0.54 $26.87 $10,613,000 SEC