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TMO

Thermo Fisher Scientific Inc.

Health CareS&P 500

Thermo Fisher Scientific Inc. insider trading

Thermo Fisher Scientific Inc. files with the SEC as a Measuring & Controlling Devices, NEC company headquartered in Waltham, MA. Every time one of its executives or directors buys or sells the stock, the filing appears here the moment it reaches the SEC — with grants and option exercises set apart from the trades that cost the insider their own money.

From SEC filings

Recent TMO insider transactions

5 insiders traded TMO on the open market between Aug 07, 2026 and Aug 31, 2026 — 24 sales worth $37.8M, of which 22 were pre-scheduled under a 10b5-1 plan.

Bought
—
Sold
$37.8M

22 of 24 on a 10b5-1 plan

Net
−$37.8M
Insiders
5

Open-market purchases (code P) and sales (code S) from Thermo Fisher Scientific Inc.'s own SEC Form 4 filings. Grants and option exercises are excluded — they are compensation, not decisions. Share counts are derived from the reported value and price. Verify any figure against the original filing before acting on it; this is monitoring, not advice.

Filing history last read from EDGAR on Sep 21, 2026. The live dashboard shows new filings the moment they clear.

Every TMO Form 4 on SEC.gov

SEC Form 4 data, Q3 2024 to Q2 2026

TMO insider trading by quarter

Between Jul 01, 2024 and Jun 30, 2026, 10 insiders traded TMO on the open market: 2 purchases worth $11K and 250 sales worth $230.4M, 234 of the sales pre-scheduled under a 10b5-1 plan. In the last four quarters alone: 0 purchases and 99 sales ($110.6M), by 7 insiders.

QuarterBoughtSold
Q2 2026—−$185.1K1 sale · all on a plan
Q1 2026—−$8.2M35 sales · all on a plan
Q4 2025—−$88.2M31 sales · 23 on a plan
Q3 2025—−$14M32 sales · 30 on a plan
Q2 2025—−$293.4K2 sales · all on a plan
Q1 2025—−$33.8M24 sales · 22 on a plan
Q4 2024+$11K2 buys−$53.4M72 sales · all on a plan
Q3 2024—−$32.3M53 sales · 49 on a plan
Largest purchase
+$8.9K of TMO by Chai Nelson (Director) on Nov 07, 2024.
Largest sale
−$17.5M of TMO by Lagarde Michel (Executive Vice President & COO) on Dec 02, 2025.

Open-market transactions through Jun 30, 2026most recent first

  • Pettiti Gianluca10b5-1

    President & COO

    −$185.1K

    Apr 27, 2026

    400 sh · $462.66

  • Shafer Michael D10b5-1

    Executive Vice President

    −$802.5K

    Mar 11, 2026

    1,607 sh · $499.40

  • Casper Marc N10b5-1

    Chairman & CEO · Director

    −$582K

    Mar 05, 2026

    1,133 sh · $513.71

  • Casper Marc N10b5-1

    Chairman & CEO · Director

    −$293.4K

    Mar 05, 2026

    570 sh · $514.71

  • Casper Marc N10b5-1

    Chairman & CEO · Director

    −$267.9K

    Mar 05, 2026

    516 sh · $519.13

  • Casper Marc N10b5-1

    Chairman & CEO · Director

    −$210.7K

    Mar 05, 2026

    411 sh · $512.73

  • Casper Marc N10b5-1

    Chairman & CEO · Director

    −$179.4K

    Mar 05, 2026

    348 sh · $515.64

  • Casper Marc N10b5-1

    Chairman & CEO · Director

    −$137.2K

    Mar 05, 2026

    264 sh · $519.74

  • Casper Marc N10b5-1

    Chairman & CEO · Director

    −$109.5K

    Mar 05, 2026

    214 sh · $511.78

  • Casper Marc N10b5-1

    Chairman & CEO · Director

    −$103.9K

    Mar 05, 2026

    201 sh · $516.73

  • Casper Marc N10b5-1

    Chairman & CEO · Director

    −$54.9K

    Mar 05, 2026

    106 sh · $517.83

  • Casper Marc N10b5-1

    Chairman & CEO · Director

    −$50.5K

    Mar 05, 2026

    99 sh · $509.66

  • Casper Marc N10b5-1

    Chairman & CEO · Director

    −$30.3K

    Mar 05, 2026

    60 sh · $505.76

  • Casper Marc N10b5-1

    Chairman & CEO · Director

    −$29.4K

    Mar 05, 2026

    58 sh · $507.54

  • Casper Marc N10b5-1

    Chairman & CEO · Director

    −$10.1K

    Mar 05, 2026

    20 sh · $503.66

From SEC's quarterly Form 3, 4 and 5 data sets: code P purchases and code S sales of common stock, by the date the trade happened. Where a fund and the people who control it each report the same block, it is counted once. Trades made in the last days of Q2 2026 but filed after it closed arrive with SEC's next quarterly release.

Thermo Fisher Scientific Inc. company record

SEC industry classification
Measuring & Controlling Devices, NEC
Headquarters
Waltham, MA
Incorporated in
DE
Listed on
NYSE
SEC Central Index Key
0000097745
Previously filed as
THERMO ELECTRON CORP

Sourced from this company's own SEC submissions record. The industry label is SEC's Standard Industrial Classification, which is more specific than the Health Care sector shown above.

After insiders bought TMO

What the stock actually did in the 90 days following each open-market purchase

Don't check TMO — let it ping you

Get told the moment an insider moves on TMO

Pro watches Thermo Fisher Scientific Inc. for you and sends a Telegram ping within moments of a Form 4 clearing EDGAR — a C-suite open-market buy, a cluster, a 10b5-1 regime break — long before it reaches the press. Add TMO to a watchlist, see each mover's benchmark-measured track record and which legendary funds hold it, and read the full filing history instead of the last 72 hours.

Track TMO on the live dashboardFilings on SEC.gov

The live dashboard is free to open. Alerts, watchlists, full filing history and each mover's benchmark-measured track record are Pro. Monitoring, not advice.

How to read TMO insider activity

Open-market purchase (code P)
An insider spending their own money at market price. This is the only buy code that reliably carries signal — it is a decision, not compensation.
Grants and option exercises (codes A, M)
Scheduled compensation. Most "insider buying" headlines are really this, which is why InsiderPulse weights it at a fraction of a real purchase.
Cluster buy
Two or more different insiders buying on the open market in the same window. One executive buying can mean anything; three is much harder to explain away.

Other Health Care tickers

ABTDHRPFEAMGNBMYGILDVRTXREGNISRGSYKBSXMDT
This week on the tape: who actually chose to sellThe weekly split of scheduled 10b5-1 selling vs deliberate sales, with the deciders named.

Questions

Are TMO insiders buying or selling?
Between Aug 07, 2026 and Aug 31, 2026, 5 Thermo Fisher Scientific Inc. insiders made no open-market purchases and 24 sales worth $37.8M, a net sale of $37.8M. 22 of the sales were pre-scheduled under a Rule 10b5-1 plan.
How much TMO stock have insiders bought and sold in the last two years?
Between Jul 01, 2024 and Jun 30, 2026, 10 Thermo Fisher Scientific Inc. insiders made 2 open-market purchases worth $11K and 250 sales worth $230.4M. 234 of the sales were pre-scheduled under a Rule 10b5-1 plan. In the four quarters to Jun 30, 2026: no purchases and 99 sales ($110.6M). The largest purchase was Chai Nelson buying $8.9K on Nov 07, 2024. The largest sale was Lagarde Michel selling $17.5M on Dec 02, 2025.
What was the largest recent TMO insider trade?
Shafer Michael D (Executive Vice President) sold $8.6M of TMO stock on Aug 11, 2026 at about $600.00 a share, under a pre-scheduled 10b5-1 plan.
When did an insider last buy TMO shares?
No open-market purchase by a Thermo Fisher Scientific Inc. insider appears in the filings from Aug 07, 2026 to Aug 31, 2026 — every recorded open-market transaction in that period was a sale. Before that, the most recent purchase in SEC's data was Chai Nelson buying $2.1K on Dec 09, 2024.
Where does TMO insider trading data come from?
From the Form 4 filings Thermo Fisher Scientific Inc.'s officers, directors and 10% owners must send the SEC within two business days of a trade. Each row on this page links to its original filing on SEC EDGAR. Share grants and option exercises are kept apart from open-market purchases and sales, because only the latter cost the insider their own money.

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