StockCIK 97745
THERMO FISHER SCIENTIFIC INC. (TMO): Insider Trades and Fund Holdings
In the past 12 months, THERMO FISHER SCIENTIFIC INC. insiders reported 0 open-market purchases worth $0 and 6 sales worth $37.6M; 5 of the sales were reported as made under a 10b5-1 trading plan.
0Insider buys, 12 months
$0Bought by insiders, 12 months
$37.6MSold by insiders, 12 months
4Tracked funds holding
Recent insider trades
Open-market purchases (code P) and sales (code S) from Form 4. Grants, option exercises and gifts are not shown. Latest filing: Sep 1, 2026.
| Filed | Insider | Type | Value |
|---|---|---|---|
| Sep 1 | Gianluca PettitiCOO | ▼ SELL10b5-1 | $2.54M |
| Aug 26 | Marc N. CasperCEO | ▼ SELL10b5-1 | $172K |
| Aug 24 | Marc N. CasperCEO | ▼ SELL10b5-1 | $6.29M |
| Aug 24 | Marc N. CasperCEO | ▼ SELL10b5-1 | $6.27M |
| Aug 20 | Lisa P. BrittVP | ▼ SELL | $7.01M |
| Aug 13 | Michael D. ShaferPresident | ▼ SELL10b5-1 | $15.3M |
Source: SEC Form 4 filings, retrieved Oct 28, 2026. How we read filings
Insiders who traded in the past year
| Insider | Role | Buys | Bought | Sells | Sold |
|---|---|---|---|---|---|
| Gianluca Pettiti | COO | 0 | $0 | 1 | $2.54M |
| Marc N. Casper | CEO | 0 | $0 | 3 | $12.7M |
| Lisa P. Britt | VP | 0 | $0 | 1 | $7.01M |
| Michael D. Shafer | President | 0 | $0 | 1 | $15.3M |
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Tracked funds that report TMO
From each fund's latest 13F. Holdings are as of quarter end and are filed up to 45 days later.
| Fund | Shares | Value | Change |
|---|---|---|---|
| Viking Global Investors | 1,937,415 | $971.3M | ▲ +16.2% |
| Markel Group | 73,100 | $36.6M | ▲ +8.9% |
| Bridgewater Associates | 12,948 | $6.49M | ▼ −10.6% |
| Duquesne Family Office | 19,200 | $10K | ▲ New |
| Renaissance Technologies | 0 | $0 | ▼ Sold out |
Source: SEC Form 13F-HR filings, retrieved Oct 28, 2026. How we read filings
Reading these numbers
Insiders sell for many reasons: taxes, diversification, a house. Purchases with their own money are rarer and are usually read as more informative. A Form 4 is due within two business days of the trade. How to read a Form 4 →