Stock ownership
Thermo Fisher Scientific Inc.
- Ticker
- TMO
- CUSIP
- 883556102
- Held by
- 3 funds
- Combined value
- $859,518,359
+% bought more, −% sold down — each fund's last-quarter move (change in share count).
| Fund | Quarter | Last quarter | Value | % of fund |
|---|---|---|---|---|
| Viking Global Investors position history | Q1 2026 | +110% | $819,884,328 | 2.29% |
| Markel Group position history | Q1 2026 | +7% | $32,981,664 | 0.28% |
| Tudor Investment Corp position history | Q1 2026 | +57% | $6,652,367 | 0.04% |