TMO
insider transactionsTHERMO FISHER SCIENTIFIC INC. — buys & sells by directors, officers and 10% owners A shareholder owning more than 10% of the company. Must report trades, but usually a weaker signal than an officer or director. (SEC Form 4).
Net shares · 90d
-400
0 buy · 400 sell
Net value · 90d
-$185.1K
$0 in · $185.1K out
Sentiment · 90d
Net selling
0% buying · 100% selling
Open-market trades · 90d
1
0 buy · 400 sell
Net buy / sell volume
Not enough data to chart yet.
Tap or hover the chart for daily net volume. Green = net buying, red = net selling.
All transactions
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Other·F
Director
$63.7K
193 sh · $330.26
Own -10%
-
Grant·A
Director
—
681 sh
Own +52%
-
Grant·A
Director
$0
499 sh
Own +10%
-
Other·F
Director
$36.3K
80 sh · $451.79
Own -2%
-
Grant·A
Director
$0
499 sh
Own +24%
-
Grant·A
Director
$0
499 sh
Own +1%
-
Grant·A
Director
$0
499 sh
Own +76%
-
Grant·A
Director
$0
499 sh
Own +24%
-
Grant·A
Director
$0
499 sh
Own +6%
-
Grant·A
Director
$0
499 sh
Own +55%
-
Grant·A
Director
$0
499 sh
Own +6%
-
Grant·A
Director
$0
499 sh
Own +3%
-
Sell·S
Gianluca Pettiti KEY
President & COO · 10b5-1
$185.1K
400 sh · $462.66
Own -2%
-
Grant·A
Director
—
79 sh
Own +3%
-
Grant·A
Director
—
90 sh
Own +1%
-
Grant·A
Director
—
66 sh
Own +29%
-
Grant·A
Director
—
66 sh
Own +5%
-
Grant·A
Director
—
66 sh
Own +11%
| Date▾ | Insider | Type | Shares | Value |
|---|---|---|---|---|
| May 21, 2026 | Nelson Chai | Other F | 193 | $63.7K |
| May 21, 2026 | Nelson Chai | Grant A | 681 | — |
| May 20, 2026 | Dion J Weisler | Grant A | 499 | $0 |
| May 20, 2026 | Dion J Weisler | Other F | 80 | $36.3K |
| May 20, 2026 | Debora L Spar | Grant A | 499 | $0 |
| May 20, 2026 | Scott M Sperling | Grant A | 499 | $0 |
| May 20, 2026 | Karen S Lynch | Grant A | 499 | $0 |
| May 20, 2026 | Alexandra R. Keith | Grant A | 499 | $0 |
| May 20, 2026 | Tyler Jacks | Grant A | 499 | $0 |
| May 20, 2026 | Jennifer M Johnson | Grant A | 499 | $0 |
| May 20, 2026 | Martin C Harris | Grant A | 499 | $0 |
| May 20, 2026 | Nelson Chai | Grant A | 499 | $0 |
| Apr 27, 2026 | Gianluca Pettiti KEY 10b5-1 | Sell S | 400 | $185.1K |
| Mar 28, 2026 | Dion J Weisler | Grant A | 79 | — |
| Mar 28, 2026 | Scott M Sperling | Grant A | 90 | — |
| Mar 28, 2026 | Karen S Lynch | Grant A | 66 | — |
| Mar 28, 2026 | Alexandra R. Keith | Grant A | 66 | — |
| Mar 28, 2026 | Jennifer M Johnson | Grant A | 66 | — |
About TMO insider trading
This page tracks insider transactions for THERMO FISHER SCIENTIFIC INC. (TMO) reported to the U.S. Securities and Exchange Commission on Form 4. Corporate insiders — directors, executive officers and beneficial owners of more than 10% of the stock — must disclose their trades within two business days. Open-market purchases (code P) and sales (code S) made at the insider's discretion are the most-watched opportunistic signals, while awards (A), option exercises (M) and tax-withholding (F) reflect compensation rather than conviction. Trades marked 10b5-1 were made under a pre-arranged plan and are considered routine. A cluster buy — several insiders buying within a short window — is historically a stronger bullish indicator than any single trade.