Thermo Fisher Scientific Inc. — SEC Form 4 Filings
SEC Form 4 Data
Track insider buying and selling activity for Thermo Fisher Scientific Inc. (TMO). Data sourced from SEC EDGAR Form 4 filings and analyzed by StoxPulse AI for significance.
11
$1.2M total
9
$1.5M total
1.2x
Neutral Signal
20
Form 4 transactions
Buy − Sell value
Buy · Mar 5, 2026
WEISLER · Sale
Thermo Fisher Scientific Inc. insiders filed 20 Form 4 transactions in the period analyzed: 11 purchases totaling $1.2M and 9 sales totaling $1.5M. That puts the buy-to-sell ratio at 1.22, which we read as neutral on a directional basis.
The most active filer was CASPER MARC N with 7 transactions in this window. 20 of the 20 filings are flagged as routine — typically 10b5-1 scheduled trades rather than discretionary signals.
Form 4 filings are point-in-time disclosures and do not constitute investment advice. Routine sales under pre-arranged 10b5-1 plans should not be read as bearish.
| Insider | Title | Type | Shares | Price | Value | Date |
|---|---|---|---|---|---|---|
| WEISLER DION J | Director | Sale | 80.287 | $451.79 | $36K | 2026-05-20 |
| WEISLER DION J | Director | Buy | 499 | $0.00 | $0.00 | 2026-05-20 |
| SPERLING SCOTT M | Director | Buy | 499 | $0.00 | $0.00 | 2026-05-20 |
| Spar Debora L | Director | Buy | 499 | $0.00 | $0.00 | 2026-05-20 |
| Lynch Karen S | Director | Buy | 499 | $0.00 | $0.00 | 2026-05-20 |
| Keith R. Alexandra | Director | Buy | 499 | $0.00 | $0.00 | 2026-05-20 |
| JOHNSON JENNIFER M | Director | Buy | 499 | $0.00 | $0.00 | 2026-05-20 |
| Jacks Tyler | Director | Buy | 499 | $0.00 | $0.00 | 2026-05-20 |
| HARRIS C MARTIN | Director | Buy | 499 | $0.00 | $0.00 | 2026-05-20 |
| CHANDY RUBY R | Director | Buy | 499 | $0.00 | $0.00 | 2026-05-20 |
| Chai Nelson | Director | Buy | 499 | $0.00 | $0.00 | 2026-05-20 |
| Pettiti Gianluca | President & COO | Sale | 400 | $462.66 | $185K | 2026-04-27 |
| Shafer Michael D | Executive Vice President | Sale | 1,607 | $499.40 | $803K | 2026-03-11 |
| CASPER MARC N | Chairman & CEO | Buy | 4,000 | $309.63 | $1.2M | 2026-03-05 |
| CASPER MARC N | Chairman & CEO | Sale | 20 | $503.66 | $10K | 2026-03-05 |
| CASPER MARC N | Chairman & CEO | Sale | 60 | $505.76 | $30K | 2026-03-05 |
| CASPER MARC N | Chairman & CEO | Sale | 58 | $507.54 | $29K | 2026-03-05 |
| CASPER MARC N | Chairman & CEO | Sale | 99 | $509.66 | $50K | 2026-03-05 |
| CASPER MARC N | Chairman & CEO | Sale | 214 | $511.78 | $110K | 2026-03-05 |
| CASPER MARC N | Chairman & CEO | Sale | 411 | $512.73 | $211K | 2026-03-05 |
Insider trading data for Thermo Fisher Scientific Inc. (TMO) is sourced directly from SEC Form 4 filings on the EDGAR database. Corporate insiders — including directors, officers, and shareholders owning more than 10% of the company — are legally required to report their transactions within two business days.
Insider purchases are often considered a bullish signal because executives are using their own money to buy shares, suggesting they believe the stock is undervalued. Insider sales, on the other hand, are more nuanced — they can reflect routine diversification plans (known as 10b5-1 plans), tax obligations, or genuine concerns about the company's outlook.
StoxPulse's AI system analyzes each TMO insider transaction to determine whether it appears routine or notable. We track the buy/sell ratio, total transaction values, and patterns over time to provide a clear picture of insider sentiment for Thermo Fisher Scientific Inc..
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Disclaimer: Insider trading data for Thermo Fisher Scientific Inc. (TMO) is sourced from SEC Form 4 filings and is provided for informational purposes only. Insider transactions should not be the sole basis for investment decisions. Always consult a qualified financial advisor.
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