Thermo Fisher Scientific Inc.
TMO- Exchange
- NYSE
- Industry
- Measuring & Controlling Devices, NEC
- SEC CIK
- 0000097745
In the last 90 days, Thermo Fisher Scientific Inc. insiders filed 0 open-market purchases and 11 sales; 2,628 institutions reported holding it in 13F filings for Q2 2026, worth $169.2B in total; 6 superinvestors hold it, including Viking Global Investors and D1 Capital Partners.
Superinvestors holding TMO, Q2 2026
6 superinvestors report holding Thermo Fisher Scientific Inc. on Form 13F, worth $1.74B in total. Weight is Thermo Fisher Scientific Inc.'s share of each 13F portfolio; actions compare shares with Q1 2026.
| Superinvestor | % of portfolio | Shares | Value | vs. previous quarter |
|---|---|---|---|---|
| Viking Global InvestorsAndreas Halvorsen | 2.8% | 1,937,415 | $971.3M | Added+16.2% |
| D1 Capital PartnersDan Sundheim | 1.2% | 817,123 | $409.7M | Added+12.7% |
| Lindsell TrainNick Train | 9.8% | 514,512 | $258.0M | Reduced−16.6% |
| Weitz Investment ManagementWally Weitz | 4.0% | 115,200 | $57.8M | Reduced−4.8% |
| Markel GroupTom Gayner | 0.3% | 73,100 | $36.6M | Added+8.9% |
| Duquesne Family OfficeStanley Druckenmiller | 0.2% | 19,200 | $9.63M | New |
Moves by quarter
Superinvestors that opened, added to, trimmed or sold out of TMO each quarter, comparing shares with the quarter before. A superinvestor that didn't file for a quarter isn't listed, and isn't counted as selling.
Q2 2026
6 superinvestors holding at quarter end
- New
- Duquesne Family Office
- Added
- Viking Global Investors (+16.2%), D1 Capital Partners (+12.7%), Markel Group (+8.9%)
- Reduced
- Lindsell Train (−16.6%), Weitz Investment Management (−4.8%)
Q1 2026
5 superinvestors holding at quarter end
- New
- D1 Capital Partners
- Added
- Viking Global Investors (+110.3%), Markel Group (+6.8%)
- Reduced
- Lindsell Train (−10.5%), Weitz Investment Management (−10.3%)
- Sold out
- Third Point, Harris Associates (Oakmark)
Q4 2025
6 superinvestors holding at quarter end
- New
- Viking Global Investors, Third Point
- Added
- Markel Group (+12.5%)
- Reduced
- Lindsell Train (−15.7%), Weitz Investment Management (−10.3%)
Q3 2025
4 superinvestors holding at quarter end
- New
- Harris Associates (Oakmark)
- Added
- Markel Group (+12.6%)
- Reduced
- Lindsell Train (−4.3%)
- Sold out
- Duquesne Family Office
Q2 2025
4 superinvestors holding at quarter end
- New
- Duquesne Family Office
- Added
- Lindsell Train (+68.0%), Weitz Investment Management (+19.3%), Markel Group (+10.1%)
Q1 2025
3 superinvestors holding at quarter end
- Added
- Lindsell Train (+24.9%), Weitz Investment Management (+5.0%), Markel Group (+9.5%)
- Sold out
- Third Point
Q4 2024
4 superinvestors holding at quarter end
- New
- Lindsell Train, Third Point
- Added
- Markel Group (+16.1%)
Q3 2024
2 superinvestors holding at quarter end
- Added
- Markel Group (+20.4%)
- Reduced
- Weitz Investment Management (−4.0%)
- Sold out
- HHLR Advisors (Hillhouse), Greenwoods Asset Management
Q2 2024
4 superinvestors holding at quarter end
- New
- HHLR Advisors (Hillhouse)
- Added
- Markel Group (+19.0%)
- Sold out
- TCI Fund Management, Viking Global Investors, Maverick Capital
Q1 2024
6 superinvestors holding at quarter end
- Added
- Weitz Investment Management (+0.1%), Markel Group (+26.0%)
- Reduced
- TCI Fund Management (−51.8%), Viking Global Investors (−76.1%), Maverick Capital (−50.8%)
Q4 2023
6 superinvestors holding at quarter end
- Added
- Markel Group (+44.1%), Maverick Capital (+94.3%)
- Reduced
- TCI Fund Management (−1.5%), Viking Global Investors (−40.1%)
- Sold out
- HHLR Advisors (Hillhouse), Gates Foundation Trust
Q3 2023
8 superinvestors holding at quarter end
- New
- Gates Foundation Trust, Greenwoods Asset Management, Maverick Capital
- Added
- TCI Fund Management (+0.6%), Viking Global Investors (+8.0%), Weitz Investment Management (+20.6%), Markel Group (+65.9%)
- Reduced
- HHLR Advisors (Hillhouse) (−22.9%)
Q2 2023
5 superinvestors holding at quarter end
- Added
- TCI Fund Management (+280.4%), Weitz Investment Management (+52.6%), HHLR Advisors (Hillhouse) (+60.7%)
- Reduced
- Viking Global Investors (−2.8%)
Q1 2023
5 superinvestors holding at quarter end
- New
- HHLR Advisors (Hillhouse)
- Added
- Viking Global Investors (+2.1%), TCI Fund Management (+1,208.1%)
- Sold out
- Lone Pine Capital
Q4 2022
5 superinvestors holding at quarter end
- New
- TCI Fund Management
- Added
- Viking Global Investors (+41.4%), Markel Group (+5.1%)
- Reduced
- Lone Pine Capital (−33.6%), Weitz Investment Management (−6.9%)
Q3 2022
4 superinvestors holding at quarter end
- Added
- Markel Group (+20.0%)
- Reduced
- Lone Pine Capital (−5.0%), Viking Global Investors (−31.2%), Weitz Investment Management (−6.9%)
- Sold out
- ARK Invest
Q2 2022
5 superinvestors holding at quarter end
- Added
- Lone Pine Capital (+79.0%), Viking Global Investors (+78.0%), Markel Group (+233.3%)
- Reduced
- ARK Invest (−63.1%)
Q1 2022
5 superinvestors holding at quarter end
- New
- Lone Pine Capital
- Added
- Viking Global Investors (+129.7%), Markel Group (+550.0%)
- Reduced
- ARK Invest (−30.9%)
Q4 2021
4 superinvestors holding at quarter end
- New
- Markel Group
- Added
- Viking Global Investors (+15.8%), ARK Invest (+13.9%)
- Reduced
- Weitz Investment Management (−5.6%)
Q3 2021
3 superinvestors holding at quarter end
- Reduced
- Viking Global Investors (−82.0%), ARK Invest (−23.9%)
- Sold out
- Maverick Capital
Q2 2021
4 superinvestors holding at quarter end
- Added
- Viking Global Investors (+17.3%)
- Reduced
- ARK Invest (−99.5%), Maverick Capital (−63.4%)