THERMO FISHER SCIENTIFIC INC. (TMO) insider trading
No open-market insider purchases of THERMO FISHER SCIENTIFIC INC. are on record; 1 open-market sale is.
Follow TMO, freeOpen the live feed
A free account gets an alert the minute a new buy or sale is filed.
Insider purchases
No open-market purchases on record.
Insider sales
1 open-market sale on record
| Filed | Insider | Sold |
|---|---|---|
| Oct 30 Form 4 (opens sec.gov) |
Lisa P. BrittChief Hr Officer | $2.0M 2,831 at $706.45 · 20% of holdings |
Most insider sales are planned in advance or made for personal reasons, so a sale says less than a buy.
TMO trades reported by members of Congress
| Reported | Member | Trade | Amount |
|---|---|---|---|
| Aug 7 |  Michael RulliR-OH · House603 days after the trade | Sale | $1K–$15K |
| Jul 21 |  Alan ArmstrongR-OK · Senate116 days after the trade | Buy | $1K–$15K |
Members of Congress report trades up to 45 days later, in dollar ranges. Every member's trades.
Planned insider sales of TMO (Form 144)
| Filed | Insider | To sell |
|---|---|---|
| Oct 28 Form 144 | Britt Lisa P.Officer · no trading plan named | $2.0M 2,831 shares from Oct 28 |
A Form 144 is filed before an insider sells restricted or control shares; the Form 4 reports the sale once made.
Questions
Are insiders buying TMO stock?
Not recently: no open-market purchases were filed in the last 90 days.
Who bought TMO stock most recently?
No insider has bought TMO on the open market in the filings on record.
How does InsiderBeacon score an insider buy?
Out of 100, from who bought, how much their stake grew, the size of the trade, whether other insiders bought within ten days, where the price sat in its 52-week range, and whether it was a first or a routine buy. The score is fixed when the filing arrives. The formula and the research behind it.
Data as of Oct 30, 2026, from SEC EDGAR Form 4 filings: open-market purchases (code P) of $25,000 or more, and open-market sales. Every row links to its filing. Scores summarise what a filing says (how the score works); outcomes are hypothetical, from the first close after the filing, and past results don't predict future ones. Disclaimer