Who owns Thermo Fisher Scientific Inc (TMO)?
625 US mutual funds and ETFs from 266 fund families reported a position in TMO for the quarter ending 2026-06-30. Against their own report a quarter earlier, 190 raised shares, 39 opened a new position, 295 cut and 29 sold out.
Largest fund families
| Fund family | Funds | Share of fund-held shares |
|---|---|---|
| Vanguard Index Funds | 4 | 34.1% |
| Ishares Trust | 14 | 11.0% |
| Fidelity Contrafund | 4 | 5.2% |
| Select Sector Spdr Trust | 1 | 3.5% |
| Dodge & Cox Funds | 3 | 3.2% |
| Vanguard Institutional Index Funds | 2 | 2.9% |
Tracked managers holding TMO
| Investor | Book weight |
|---|---|
| Larry Robbins · Glenview | 5.7% |
| Andreas Halvorsen · Viking Global | 2.8% |
| Dan Sundheim · D1 Capital | 1.2% |
Source: SEC Form N-PORT, which funds file about 60 days after quarter end, and the latest 13F filings. Share counts, not trades: a change can reflect fund inflows or outflows rather than a decision about TMO. A record of holdings, not a forecast and not investment advice. See all owner pages or the forecast board for the names our model ranks.
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