Viking Global Investors’s Thermo Fisher Scientific TMO Stock Holding History
Bought
Maintained
Sold
| Quarter | Market Value | Status | Shares |
Change in Stake | Trade Value | Portfolio Weight | Portfolio Position | |
|---|---|---|---|---|---|---|---|---|
|
2026
Q1 | $820M | Buy |
1,668,025
+874,838
| +110% | +$475M | 2.29% | 14 |
|
|
2025
Q4 | $460M | Buy |
+793,187
| New | +$449M | 1.22% | 33 |
|
|
2024
Q2 | – | Sell |
-128,489
| Closed | -$74.7M | – | 98 |
|
|
2024
Q1 | $74.7M | Sell |
128,489
-409,996
| -76% | -$230M | 0.28% | 64 |
|
|
2023
Q4 | $286M | Sell |
538,485
-361,230
| -40% | -$175M | 1.05% | 32 |
|
|
2023
Q3 | $455M | Buy |
899,715
+66,482
| +8% | +$35.4M | 1.85% | 20 |
|
|
2023
Q2 | $435M | Sell |
833,233
-23,603
| -3% | -$12.7M | 1.78% | 20 |
|
|
2023
Q1 | $494M | Buy |
856,836
+17,310
| +2% | +$9.76M | 2.32% | 17 |
|
|
2022
Q4 | $462M | Buy |
839,526
+245,989
| +41% | +$130M | 2.31% | 16 |
|
|
2022
Q3 | $301M | Sell |
593,537
-269,050
| -31% | -$151M | 1.39% | 27 |
|
|
2022
Q2 | $469M | Buy |
862,587
+377,891
| +78% | +$208M | 2.14% | 20 |
|
|
2022
Q1 | $286M | Buy |
484,696
+273,638
| +130% | +$157M | 1.16% | 27 |
|
|
2021
Q4 | $141M | Buy |
211,058
+28,821
| +16% | +$18M | 0.41% | 65 |
|
|
2021
Q3 | $104M | Sell |
182,237
-829,164
| -82% | -$455M | 0.29% | 70 |
|
|
2021
Q2 | $510M | Buy |
1,011,401
+149,514
| +17% | +$70.5M | 1.55% | 25 |
|
|
2021
Q1 | $393M | Buy |
861,887
+784,070
| +1,008% | +$374M | 1.17% | 32 |
|
|
2020
Q4 | $36.2M | Sell |
77,817
-1,299,406
| -94% | -$609M | 0.1% | 82 |
|
|
2020
Q3 | $608M | Sell |
1,377,223
-356,921
| -21% | -$147M | 2.2% | 13 |
|
|
2020
Q2 | $628M | Buy |
+1,734,144
| New | +$581M | 2.72% | 10 |
|
|
2019
Q2 | – | Sell |
-1,146,037
| Closed | -$314M | – | 72 |
|
|
2019
Q1 | $314M | Buy |
1,146,037
+598,131
| +109% | +$149M | 1.8% | 22 |
|
|
2018
Q4 | $123M | Sell |
547,906
-1,329,914
| -71% | -$312M | 0.7% | 33 |
|
|
2018
Q3 | $458M | Sell |
1,877,820
-602,542
| -24% | -$139M | 2.54% | 11 |
|
|
2018
Q2 | $514M | Buy |
2,480,362
+1,615,681
| +187% | +$343M | 2.94% | 12 |
|
|
2018
Q1 | $179M | Buy |
864,681
+50,164
| +6% | +$10.5M | 1.08% | 27 |
|
|
2017
Q4 | $155M | Buy |
+814,517
| New | +$156M | 0.95% | 29 |
|
|
2015
Q3 | – | Sell |
-207,527
| Closed | -$26.9M | – | 74 |
|
|
2015
Q2 | $26.9M | Sell |
207,527
-3,324,310
| -94% | -$433M | 0.1% | 53 |
|
|
2015
Q1 | $474M | Sell |
3,531,837
-2,254,673
| -39% | -$291M | 1.84% | 20 |
|
|
2014
Q4 | $725M | Sell |
5,786,510
-2,189,992
| -27% | -$266M | 3.33% | 8 |
|
|
2014
Q3 | $971M | Sell |
7,976,502
-294,778
| -4% | -$35.8M | 3.9% | 7 |
|
|
2014
Q2 | $976M | Sell |
8,271,280
-1,397,359
| -14% | -$164M | 4.26% | 6 |
|
|
2014
Q1 | $1.16B | Sell |
9,668,639
-707,017
| -7% | -$84.1M | 4.88% | 6 |
|
|
2013
Q4 | $1.16B | Sell |
10,375,656
-195,114
| -2% | -$19.4M | 5.39% | 1 |
|
|
2013
Q3 | $974M | Buy |
10,570,770
+1,881,170
| +22% | +$170M | 5.38% | 3 |
|
|
2013
Q2 | $735M | Buy |
+8,689,600
| New | +$723M | 4.09% | 9 |
|
Other funds holding TMO
VCM
Viking Global Investors's TMO Position: Q1 2026 in Review
Viking Global Investors increased its Thermo Fisher Scientific (TMO) stake by 110% in Q1 2026, buying an estimated $475M and bringing the position to 1,668,025 shares worth $820M. The position accounts for 2.29% of the portfolio, ranked #14.
Viking Global Investors first reported a position in TMO in Q2 2013 and has held it in 33 quarters since. The position peaked at $1.16B in Q1 2014. 2,588 funds tracked by Wall St. Rank hold TMO as of Q1 2026.
- Viking Global Investors held 1,668,025 shares of Thermo Fisher Scientific worth $820M as of Q1 2026.
- Viking Global Investors bought 874,838 Thermo Fisher Scientific shares in Q1 2026, an estimated $475M.
- Thermo Fisher Scientific made up 2.29% of Viking Global Investors's portfolio in Q1 2026, its #14 holding.
- Viking Global Investors first reported a position in Thermo Fisher Scientific in Q2 2013 and has held it in 33 quarters since.
- Viking Global Investors's Thermo Fisher Scientific position peaked at $1.16B in Q1 2014.
- 2,588 funds tracked by Wall St. Rank held Thermo Fisher Scientific as of Q1 2026.
Based on Viking Global Investors's 13F filing for Q1 2026, filed 15 May 2026.