Thermo Fisher Scientific
TMO · NYSE
Who owns TMO
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 28.8% of TMO’s shares.
- Vanguard Capital Management, LLC6.5%
- BlackRock Institutional Trust Company, N.A.4.7%
- State Street Investment Management (US)4.5%
- Fidelity Management & Research Company LLC3.3%
- Next 6 largest institutions9.7%
- All other shareholders71.2%
| Holder | Shares | % of shares |
|---|---|---|
| Vanguard Capital Management, LLC | 24.28M | 6.53% |
| BlackRock Institutional Trust Company, N.A. | 17.56M | 4.72% |
| State Street Investment Management (US) | 16.83M | 4.53% |
| Fidelity Management & Research Company LLC | 12.15M | 3.27% |
| Geode Capital Management, L.L.C. | 8.38M | 2.26% |
| Vanguard Portfolio Management, LLC | 6.23M | 1.68% |
| Capital World Investors | 6.20M | 1.67% |
| Morgan Stanley Smith Barney LLC | 5.66M | 1.52% |
| Norges Bank Investment Management (NBIM) | 5.09M | 1.37% |
| T. Rowe Price Associates, Inc. | 4.57M | 1.23% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Vanguard Total Stock Market Index Fund | 11.83M | 3.18% |
| Vanguard 500 Index Fund | 9.75M | 2.62% |
| Statens Pensjonsfond Utland | 5.08M | 1.37% |
| iShares Core S&P 500 ETF | 4.96M | 1.33% |
| Fidelity 500 Index Fund | 4.81M | 1.29% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $61.74M (94 trades) of TMO on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Keith R. Alexandra | Award | 46 | — |
| WEISLER DION J | Award | 56 | — |
| Lynch Karen S | Award | 46 | — |
| SPERLING SCOTT M | Award | 63 | — |
| JOHNSON JENNIFER M | Award | 46 | — |
| Pettiti Gianluca | Option exercise | 3.73K | — |
| Pettiti Gianluca | Sale | 3.73K | $2.29M |
| Pettiti Gianluca | Option exercise | 3.73K | $1.16M |
| Pettiti Gianluca | Sale | 400 | $245.75K |
| Meyer James | Tax withholding | 114 | $70.93K |
Congressional trades
Disclosed by members of Congress over the last 12 months
| Member | Type | Amount | Traded |
|---|---|---|---|
| Dan Newhouse | Sale | $1K–$15K | Jul 10, 2026 |
| Dwight EvansHouse | Sale | $1K–$15K | May 7, 2026 |
| Ro KhannaHouse | Purchase | $15K–$50K | Apr 13, 2026 |
| Alan ArmstrongSenator | Purchase | $1K–$15K | Mar 27, 2026 |
| Ro KhannaHouse | Purchase | $1K–$15K | Mar 6, 2026 |
| Ro KhannaHouse | Purchase | $15K–$50K | Nov 7, 2025 |
Short interest
Settled Sep 30, 2026
- Shares short
- 5.41M
- Days to cover
- 2.07
- % of shares outstanding
- 1.46%
- Average daily volume
- 2.61M
- Change since last report
- +7.7%
Information on this page is provided for informational purposes only and is not a recommendation to buy, sell or hold any security. Investing involves risk, including possible loss of principal. Market data is delayed at least 15 minutes and is provided without warranty. Analyst ratings, price targets and company data come from third-party sources. Past performance does not guarantee future results.