TMO insider trading — Thermo Fisher Scientific Inc.
Over the last 90 days, insiders at Thermo Fisher Scientific Inc. (TMO) made 0 open-market purchases worth $0 and 3 open-market sales worth $10.65M, making them net sellers by $10.65M. The largest sale was by Britt Lisa P. (Sr. VP and Chief HR Officer), who sold 11,440 shares for $7.01M on Aug 19, 2026.
Updated Oct 16, 2026.
Recent TMO insider transactions
Every Form 4 filed by Thermo Fisher Scientific Inc. officers, directors and 10% owners in the last 90 days, newest first. P = open-market purchase, S = open-market sale; other codes are awards, option exercises, tax withholding or gifts.
| Trade date | Insider | Role | Type | Ownership | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|---|
| Aug 28, 2026 | Casper Marc N | Chairman & CEO | F · Tax withholding | Direct | 1,257 | $622.18 | $782K | Form 4 |
| Aug 28, 2026 | Shropshire Thomas B Jr. | SVP and General Counsel | F · Tax withholding | Direct | 49 | $622.18 | $31K | Form 4 |
| Aug 28, 2026 | Meyer James | Sr. Vice President & CFO | F · Tax withholding | Direct | 270 | $622.18 | $168K | Form 4 |
| Aug 31, 2026 | Pettiti Gianluca | President & COO | S · Sale · 10b5-1 | Direct | 4,133 | $614.38 | $2.54M | Form 4 |
| Aug 31, 2026 | Pettiti Gianluca | President & COO | M · Option exercise · 10b5-1 | Direct | 3,733 | $309.63 | $1.16M | Form 4 |
| Aug 28, 2026 | Britt Lisa P. | Sr. VP and Chief HR Officer | F · Tax withholding | Direct | 394 | $622.18 | $245K | Form 4 |
| Aug 28, 2026 | Holmes Joseph R. | VP & Chief Accounting Officer | F · Tax withholding | Direct | 50 | $622.18 | $31K | Form 4 |
| Aug 28, 2026 | Pettiti Gianluca | President & COO | F · Tax withholding · 10b5-1 | Direct | 1,035 | $622.18 | $644K | Form 4 |
| Aug 28, 2026 | Shafer Michael D | Executive Vice President | F · Tax withholding | Direct | 790 | $622.18 | $492K | Form 4 |
| Aug 24, 2026 | Casper Marc N | Chairman & CEO | M · Option exercise · 10b5-1 | Direct | 275 | $309.63 | $85K | Form 4 |
| Aug 24, 2026 | Casper Marc N | Chairman & CEO | S · Sale · 10b5-1 | Direct | 275 | $627.05 | $172K | Form 4 |
| Aug 22, 2026 | Meyer James | Sr. Vice President & CFO | F · Tax withholding | Direct | 31 | $629.27 | $19K | Form 4 |
| Aug 21, 2026 | Casper Marc N | Chairman & CEO | M · Option exercise · 10b5-1 | Direct | 10,000 | $309.63 | $3.10M | Form 4 |
| Aug 21, 2026 | Casper Marc N | Chairman & CEO | S · Sale · 10b5-1 | Direct | 10,000 | $626.92 | $6.27M | Form 4 |
| Aug 20, 2026 | Casper Marc N | Chairman & CEO | M · Option exercise · 10b5-1 | Direct | 10,000 | $309.63 | $3.10M | Form 4 |
| Aug 20, 2026 | Casper Marc N | Chairman & CEO | S · Sale · 10b5-1 | Direct | 10,000 | $629.27 | $6.29M | Form 4 |
| Aug 19, 2026 | Britt Lisa P. | Sr. VP and Chief HR Officer | M · Option exercise | Direct | 11,440 | $418.32 | $4.79M | Form 4 |
| Aug 19, 2026 | Britt Lisa P. | Sr. VP and Chief HR Officer | S · Sale | Direct | 11,440 | $613.12 | $7.01M | Form 4 |
| Aug 11, 2026 | Shafer Michael D | Executive Vice President | M · Option exercise · 10b5-1 | Direct | 25,500 | $370.58 | $9.45M | Form 4 |
| Aug 11, 2026 | Shafer Michael D | Executive Vice President | S · Sale · 10b5-1 | Direct | 25,500 | $600.00 | $15.30M | Form 4 |
| Aug 7, 2026 | Casper Marc N | Chairman & CEO | M · Option exercise · 10b5-1 | Direct | 275 | $309.63 | $85K | Form 4 |
| Aug 7, 2026 | Casper Marc N | Chairman & CEO | S · Sale · 10b5-1 | Direct | 275 | $586.10 | $161K | Form 4 |
| Aug 7, 2026 | Casper Marc N | Chairman & CEO | S · Sale · 10b5-1 | Indirect | 4,608 | $586.12 | $2.70M | Form 4 |
| Aug 7, 2026 | Holmes Joseph R. | VP & Chief Accounting Officer | M · Option exercise | Direct | 420 | $309.63 | $130K | Form 4 |
| Aug 7, 2026 | Holmes Joseph R. | VP & Chief Accounting Officer | S · Sale | Direct | 420 | $584.81 | $246K | Form 4 |
| Aug 6, 2026 | Britt Lisa P. | Sr. VP and Chief HR Officer | M · Option exercise | Direct | 5,850 | $309.63 | $1.81M | Form 4 |
| Aug 6, 2026 | Britt Lisa P. | Sr. VP and Chief HR Officer | S · Sale | Direct | 5,850 | $580.00 | $3.39M | Form 4 |
| Aug 6, 2026 | Casper Marc N | Chairman & CEO | M · Option exercise · 10b5-1 | Direct | 10,000 | $309.63 | $3.10M | Form 4 |
| Aug 6, 2026 | Casper Marc N | Chairman & CEO | S · Sale · 10b5-1 | Direct | 10,000 | $574.47 | $5.74M | Form 4 |
| Aug 6, 2026 | Casper Marc N | Chairman & CEO | S · Sale · 10b5-1 | Indirect | 5,000 | $574.45 | $2.87M | Form 4 |
| Aug 5, 2026 | Casper Marc N | Chairman & CEO | M · Option exercise · 10b5-1 | Direct | 10,000 | $309.63 | $3.10M | Form 4 |
| Aug 5, 2026 | Casper Marc N | Chairman & CEO | S · Sale · 10b5-1 | Direct | 10,000 | $575.23 | $5.75M | Form 4 |
| Aug 5, 2026 | Casper Marc N | Chairman & CEO | S · Sale · 10b5-1 | Indirect | 5,000 | $575.23 | $2.88M | Form 4 |
| Jul 27, 2026 | Pettiti Gianluca | President & COO | S · Sale · 10b5-1 | Direct | 400 | $565.00 | $226K | Form 4 |
TMO insider trading FAQ
Are insiders buying TMO stock?
Not on the open market. In the last 90 days, Thermo Fisher Scientific Inc. insiders made no open-market purchases, and 3 open-market sales totaling $10.65M. Purchases with the insider's own money are generally seen as a stronger signal than sales, which happen for many reasons (taxes, diversification, planned 10b5-1 sales).
Who are the insiders trading TMO?
Recent sellers: Britt Lisa P., Holmes Joseph R..
Where does TMO insider trading data come from?
Every transaction comes from SEC Form 4 filings on EDGAR. Company officers, directors and 10% owners must file a Form 4 within two business days of buying or selling. InsiderBolt reads these filings directly from the SEC.
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Insider trading data is for informational purposes only and is not investment advice. Filings can be amended; always confirm details on SEC EDGAR.