THERMO FISHER SCIENTIFIC INC. Insider Trading Activity
Every SEC Form 4 insider transaction reported for THERMO FISHER SCIENTIFIC INC. (TMO), sourced directly from SEC EDGAR and updated as new filings are accepted.
By Trabud · Insider-trading data from SEC EDGAR
Latest filing:
Compiled automatically from SEC EDGAR Form 4 filings and refreshed daily. Figures count purchases (code P) and sales (code S) only — not grants, option exercises, or gifts. How this page is built. Not investment advice.
Quick Answer
Are TMO insiders buying or selling?
In the last 12 months, THERMO FISHER SCIENTIFIC INC. insiders reported 0 open-market purchases ($0) and 26 sales ($158.1M) — net selling of $158.1M. Since February 2018, Trabud has recorded 172 Form 4 filings for TMO: 2 buys ($4.7K) and 170 sells ($1.2B).
Source: SEC EDGAR Form 4
What stands out
- No THERMO FISHER SCIENTIFIC INC. insider made an open-market purchase in the last 12 months; the 26 reported open-market sales totaled $158.1M.
Key Statistics (February 2018 – Sep 1, 2026)
Total Form 4 filings
172
SEC EDGAR
Insider filers
20
Insider buys (2)
$4.7K
Insider sells (170)
$1.2B
Insider sentiment
Net sellingNet insider flow of $1.2B in net selling since February 2018, and $158.1M in net selling over the last 12 months.
Recent TMO insider transactions
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Sep 1, 2026 | Gianluca Pettiti | President & COO | Sale | 4.1K | $614.38 | $2.5M | SEC ↗ |
| Aug 26, 2026 | Marc N Casper | Chairman & CEO | Sale | 275 | $627.05 | $172.4K | SEC ↗ |
| Aug 24, 2026 | Marc N Casper | Chairman & CEO | Sale | 20.0K | $628.09 | $12.6M | SEC ↗ |
| Aug 20, 2026 | Lisa P. Britt | Sr. VP and Chief HR Officer | Sale | 11.4K | $613.12 | $7.0M | SEC ↗ |
| Aug 13, 2026 | Michael D Shafer | Executive Vice President | Sale | 25.5K | $600.00 | $15.3M | SEC ↗ |
| Aug 10, 2026 | Joseph R. Holmes | VP & Chief Accounting Officer | Sale | 420 | $584.81 | $245.6K | SEC ↗ |
| Aug 10, 2026 | Marc N Casper | Chairman & CEO | Sale | 4.9K | $586.12 | $2.9M | SEC ↗ |
| Aug 7, 2026 | Lisa P. Britt | Sr. VP and Chief HR Officer | Sale | 5.8K | $580.00 | $3.4M | SEC ↗ |
| Aug 7, 2026 | Marc N Casper | Chairman & CEO | Sale | 15.0K | $574.46 | $8.6M | SEC ↗ |
| Aug 7, 2026 | Marc N Casper | Chairman & CEO | Sale | 15.0K | $575.23 | $8.6M | SEC ↗ |
| Jul 28, 2026 | Gianluca Pettiti | President & COO | Sale | 400 | $565.00 | $226.0K | SEC ↗ |
| Apr 29, 2026 | Gianluca Pettiti | President & COO | Sale | 400 | $462.66 | $185.1K | SEC ↗ |
| Mar 12, 2026 | Michael D Shafer | Executive Vice President | Sale | 1.6K | $499.40 | $802.5K | SEC ↗ |
| Mar 9, 2026 | Marc N Casper | Chairman & CEO | Sale | 4.0K | $514.82 | $2.1M | SEC ↗ |
| Mar 5, 2026 | Marc N Casper | Chairman & CEO | Sale | 10.0K | $507.75 | $5.1M | SEC ↗ |
| Feb 11, 2026 | Gianluca Pettiti | Executive Vice President | Sale | 400 | $541.20 | $216.5K | SEC ↗ |
| Dec 5, 2025 | Michel Lagarde | Executive Vice President & COO | Sale | 22.0K | $563.56 | $12.4M | SEC ↗ |
| Dec 4, 2025 | Michel Lagarde | Executive Vice President & COO | Sale | 62.0K | $582.68 | $36.1M | SEC ↗ |
| Dec 3, 2025 | Frederick M. Lowery | Executive Vice President | Sale | 13.8K | $589.81 | $8.2M | SEC ↗ |
| Nov 26, 2025 | Michael D Shafer | Executive Vice President | Sale | 10.7K | $600.00 | $6.4M | SEC ↗ |
| Nov 14, 2025 | Lisa P. Britt | Sr. VP and Chief HR Officer | Sale | 1.1K | $588.26 | $622.1K | SEC ↗ |
| Nov 14, 2025 | Michel Lagarde | Executive Vice President & COO | Sale | 4.6K | $594.42 | $2.8M | SEC ↗ |
| Nov 12, 2025 | Gianluca Pettiti | Executive Vice President | Sale | 3.0K | $580.00 | $1.7M | SEC ↗ |
| Nov 10, 2025 | Lisa P. Britt | Sr. VP and Chief HR Officer | Sale | 10.2K | $571.62 | $5.8M | SEC ↗ |
| Oct 28, 2025 | Gianluca Pettiti | Executive Vice President | Sale | 400 | $574.15 | $229.7K | SEC ↗ |
Showing the 25 most recent of 172 Form 4 filings for THERMO FISHER SCIENTIFIC INC..
Most active TMO insiders
- Marc N Casper72 filings
- Stephen Williamson16 filings
- Gianluca Pettiti14 filings
- Mark Stevenson10 filings
- Michel Lagarde10 filings
Ask anything about TMO insider activity
Use Trabud's AI agent to query THERMO FISHER SCIENTIFIC INC.'s Form 4 history in plain English — "Show me TMO CEO purchases this year" or compare it against any other ticker.
Open the AI agentTMO insider trading FAQ
Are THERMO FISHER SCIENTIFIC INC. insiders buying or selling?
In the last 12 months, THERMO FISHER SCIENTIFIC INC. insiders reported 0 open-market purchases ($0) and 26 sales ($158.1M) — net selling of $158.1M. Since February 2018, Trabud has recorded 172 Form 4 filings for TMO: 2 buys ($4.7K) and 170 sells ($1.2B). Over the full record that is net selling of $1.2B.
How many insiders trade TMO stock?
20 distinct insider filers — officers, directors, 10%+ owners, and investment groups filing jointly — have reported Form 4 transactions for THERMO FISHER SCIENTIFIC INC.. The most recent filing was accepted on Sep 1, 2026.
Where does Trabud get TMO insider trading data?
All TMO insider trading data comes directly from official SEC EDGAR Form 4 filings, which corporate insiders must submit within two business days of a transaction under Section 16(a) of the Securities Exchange Act of 1934.