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THERMO FISHER SCIENTIFIC INC. (TMO) S&P 500 XNYS MEASURING & CONTROLLING DEVICES, NEC Net insider selling (90d)
Latest TMO Insider Trades
About THERMO FISHER SCIENTIFIC INC. (TMO) Thermo Fisher Scientific sells scientific instruments and laboratory equipment, diagnostics consumables, and life science reagents. The firm operates through four segments as of year-end 2025 (revenue figures include some cross-segment revenue): analytical technologies (17% of sales); specialty diagnostic products (11%); life science solutions (23%); and lab products and services, which includes CRO services (the remainder).
Headquarters WALTHAM, MA
Employees 125,000
Listed 1972
Exchange XNYS https://www.thermofisher.com SEC filings for TMO on EDGAR
90-Day SEC Filing Activity Form 4 transaction type Transactions Shares Total value Open-market sale 69 83,768 $50.39M Grant or award 5 338.67 Option exercise 20 147,520
TMO Insider Transactions (Form 4) 100 113 Form 4 filings on record, the earliest from Oct 1, 2024, newest first. Filing history page 2 of 3.
Date Insider Transaction Security Shares Price Value Mar 28, 2026 DW Dion J. Weisler - Director Grant or award Phantom Stock Units 79.22
Recent TMO Form 8-K Filings 4
Recent TMO Form 144 Notices of Proposed Sale 3 A Form 144 is notice of an INTENDED sale, not a completed one. It often precedes the Form 4 that reports the trade actually happening.
Filed Filer Relationship Shares Market value Notice Aug 31, 2026 Pettiti Gianluca Officer 4,133 $2.54M View on EDGAR Aug 24, 2026 CASPER MARC N Officer, Director
TMO Insider Trading - FAQ
What is the latest insider trade for TMO? THERMO FISHER SCIENTIFIC INC. (TMO) had 15 insider filings in the last 90 days, with the most recent on 2026-08-26. The full record for TMO runs to 113 Form 4 filings, the earliest from 2024-10-01. InsiderAlpha tracks every Form 4, Form 144, and 8-K filing in real time.
How many insiders are buying TMO stock? No insider purchases of TMO were filed in the last 90 days.
How many insiders are selling TMO stock? 69 insider sales of TMO were filed in the last 90 days, totaling $50.39M.
Where can I see TMO SEC filings (Form 4, 10-K, 10-Q, 8-K)? This page tracks TMO Form 4 insider transactions, Form 144 sale notices, and 8-K material event disclosures in one timeline. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
How can I follow TMO insider buys? Create a free InsiderAlpha account and press Watch on this page to add TMO to your watchlist. A free account also opens the full scored daily plan with every past day and 3 months of price history. No card is required. Sign up at https://insideralpha.ai/register.
More Information Technology Companies with Insider Activity Every Form 4 below links to the original document on SEC EDGAR, so the numbers on this page can be checked against the filing they came from.
Related Companies - Recent Insider Activity What is SEC Form 4? The filing insiders must submit within two business days of a trade, and how to read its transaction codes. Track TMO insider activity as it files Real-time Form 4 alerts, AI-scored daily trade ideas and 10b5-1 plan flags.
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Market cap $230.05B
P/E ratio 33.20
Dividend yield 0.30%
Average volume 2.10M
52 week high $647.00
52 week low $435.27
Today's high $620.72
Today's low $610.35
Open $614.38
Volume 1.42M
Previous close $622.18
Shares outstanding 369.75M Market cap
$230.05B
125,000 employees
TMO Insider Sentiment - Last 90 Days Share of open-market insider dollar volume that was buying versus selling, from SEC Form 4 filings.
0% Buying 100% Selling
0 insider purchases totaling $0 against 69 sales totaling $50.39M.
Most-Active TMO Insiders - Last 90 Days 10 Tax withholding / forfeiture 1 30.95
Dollar totals are shown for open-market purchases and sales only. Grants, option exercises, gifts and tax withholding are reported by share count because they are not trades at a market price.
Mar 11, 2026 MS Michael D. Shafer - Officer Open-market sale Common Stock 1,607 $499.40 $803K
Mar 5, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 60 $505.76 $30K
Mar 5, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 58 $507.54 $29K
Mar 5, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 99 $509.66 $50K
Mar 5, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 214 $511.78 $110K
Mar 5, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 411 $512.73 $211K
Mar 5, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 1,133 $513.71 $582K
Mar 5, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 570 $514.71 $293K
Mar 5, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 348 $515.64 $179K
Mar 5, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 201 $516.73 $104K
Mar 5, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 106 $517.83 $55K
Mar 5, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 516 $519.13 $268K
Mar 5, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 264 $519.74 $137K
Mar 5, 2026 MC Marc N. Casper - Officer Option exercise Stock Option (Right to Buy) 4,000 $0.00 -
Mar 5, 2026 MC Marc N. Casper - Officer Option exercise Common Stock 4,000 $309.63 $1.24M
Mar 5, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 20 $503.66 $10K
Mar 3, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 360 $501.95 $181K
Mar 3, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 120 $502.59 $60K
Mar 3, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 120 $504.06 $60K
Mar 3, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 448 $506.74 $227K
Mar 3, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 931 $507.90 $473K
Mar 3, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 759 $508.95 $386K
Mar 3, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 120 $509.62 $61K
Mar 4, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 447 $509.89 $228K
Mar 4, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 678 $510.71 $346K
Mar 4, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 1,370 $511.80 $701K
Mar 4, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 1,241 $512.92 $637K
Mar 4, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 815 $513.63 $419K
Mar 4, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 212 $514.86 $109K
Mar 4, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 119 $515.77 $61K
Mar 4, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 118 $516.75 $61K
Mar 3, 2026 MC Marc N. Casper - Officer Option exercise Stock Option (Right to Buy) 5,000 $0.00 -
Mar 4, 2026 MC Marc N. Casper - Officer Option exercise Stock Option (Right to Buy) 5,000 $0.00 -
Mar 3, 2026 MC Marc N. Casper - Officer Option exercise Common Stock 5,000 $309.63 $1.55M
Mar 4, 2026 MC Marc N. Casper - Officer Option exercise Common Stock 5,000 $309.63 $1.55M
Mar 3, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 360 $495.29 $178K
Mar 3, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 480 $496.84 $238K
Mar 3, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 680 $498.14 $339K
Mar 3, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 240 $499.75 $120K
Mar 3, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 382 $500.55 $191K
Feb 28, 2026 MC Marc N. Casper - Officer Tax withholding / forfeiture Common Stock 3,474 $521.11 $1.81M
Feb 28, 2026 MC Marc N. Casper - Officer Tax withholding / forfeiture Common Stock 1,211 $521.11 $631K
Feb 28, 2026 LB Lisa P. Britt - Officer Tax withholding / forfeiture Common Stock 262.67 $521.11 $137K
Feb 28, 2026 LB Lisa P. Britt - Officer Tax withholding / forfeiture Common Stock 85.41 $521.11 $45K
Feb 28, 2026 JH Joseph R. Holmes - Officer Tax withholding / forfeiture Common Stock 12.29 $521.11 $6K
Feb 28, 2026 JH Joseph R. Holmes - Officer Tax withholding / forfeiture Common Stock 55.48 $521.11 $29K
Feb 28, 2026 JH Joseph R. Holmes - Officer Tax withholding / forfeiture Common Stock 44.46 $521.11 $23K
Feb 28, 2026 JH Joseph R. Holmes - Officer Tax withholding / forfeiture Common Stock 4.4 $521.11 $2K
Feb 28, 2026 ML Michel Lagarde - Officer Tax withholding / forfeiture Common Stock 836.88 $521.11 $436K
Feb 28, 2026 ML Michel Lagarde - Officer Tax withholding / forfeiture Common Stock 359.73 $521.11 $187K
Feb 28, 2026 GP Gianluca Pettiti - Officer Tax withholding / forfeiture Common Stock 741.71 $521.11 $387K
Feb 28, 2026 GP Gianluca Pettiti - Officer Tax withholding / forfeiture Common Stock 331.68 $521.11 $173K
Feb 28, 2026 SW Stephen Williamson - Officer Tax withholding / forfeiture Common Stock 674.72 $521.11 $352K
Feb 28, 2026 SW Stephen Williamson - Officer Tax withholding / forfeiture Common Stock 247.07 $521.11 $129K
Feb 28, 2026 MS Michael D. Shafer - Officer Tax withholding / forfeiture Common Stock 97.98 $521.11 $51K
Feb 28, 2026 MS Michael D. Shafer - Officer Tax withholding / forfeiture Common Stock 466.2 $521.11 $243K
Feb 28, 2026 MS Michael D. Shafer - Officer Tax withholding / forfeiture Common Stock 251.66 $521.11 $131K
Feb 28, 2026 FL Frederick M. Lowery - Officer Tax withholding / forfeiture Common Stock 111.28 $521.11 $58K
Feb 28, 2026 FL Frederick M. Lowery - Officer Tax withholding / forfeiture Common Stock 521.7 $521.11 $272K
Feb 28, 2026 FL Frederick M. Lowery - Officer Tax withholding / forfeiture Common Stock 263.99 $521.11 $138K
Feb 25, 2026 ML Michel Lagarde - Officer Grant or award Common Stock 2,231 $0.00 -
Feb 25, 2026 LB Lisa P. Britt - Officer Grant or award Common Stock 1,173 $0.00 -
Feb 25, 2026 LB Lisa P. Britt - Officer Grant or award Common Stock 872 $0.00 -
Feb 25, 2026 LB Lisa P. Britt - Officer Grant or award Stock Option (Right to Buy) 5,139 $0.00 -
Feb 25, 2026 MS Michael D. Shafer - Officer Grant or award Stock Option (Right to Buy) 13,698 $0.00 -
Feb 25, 2026 JH Joseph R. Holmes - Officer Grant or award Stock Option (Right to Buy) 985 $0.00 -
Feb 25, 2026 GP Gianluca Pettiti - Officer Grant or award Stock Option (Right to Buy) 16,270 $0.00 -
Feb 25, 2026 MC Marc N. Casper - Officer Grant or award Common Stock 7,333 $0.00 -
Feb 25, 2026 MC Marc N. Casper - Officer Grant or award Common Stock 7,515 $0.00 -
Feb 25, 2026 MC Marc N. Casper - Officer Grant or award Stock Option (Right to Buy) 32,109 $0.00 -
Feb 9, 2026 GP Gianluca Pettiti - Officer Open-market sale Common Stock 400 $541.20 $216K
Dec 31, 2025 KL Karen S. Lynch - Director Grant or award Phantom Stock Units 53.93 - -
Dec 31, 2025 DW Dion J. Weisler - Director Grant or award Phantom Stock Units 64.72 - -
Dec 4, 2025 ML Michel Lagarde - Officer Option exercise Common Stock 18,637 $105.17 $1.96M
Dec 4, 2025 ML Michel Lagarde - Officer Option exercise Common Stock 22,046 $132.66 $2.92M
Dec 4, 2025 ML Michel Lagarde - Officer Open-market sale Common Stock 22,046 $563.56 $12.42M
Dec 4, 2025 ML Michel Lagarde - Officer Option exercise Stock Option (Right to Buy) 22,046 $0.00 -
Dec 4, 2025 ML Michel Lagarde - Officer Option exercise Stock Option (Right to Buy) 18,637 $0.00 -
Dec 2, 2025 ML Michel Lagarde - Officer Option exercise Common Stock 36,000 $105.17 $3.79M
Dec 2, 2025 ML Michel Lagarde - Officer Open-market sale Common Stock 30,000 $581.92 $17.46M
Dec 3, 2025 ML Michel Lagarde - Officer Option exercise Common Stock 68,000 $105.17 $7.15M
Dec 3, 2025 ML Michel Lagarde - Officer Open-market sale Common Stock 29,479 $583.33 $17.20M
Dec 3, 2025 ML Michel Lagarde - Officer Open-market sale Common Stock 2,521 $584.11 $1.47M
Dec 2, 2025 ML Michel Lagarde - Officer Option exercise Stock Option (Right to Buy) 36,000 $0.00 -
Dec 3, 2025 ML Michel Lagarde - Officer Option exercise Stock Option (Right to Buy) 68,000 $0.00 -
Aug 21, 2026 CASPER MARC N Officer, Director 10,000 $6.27M View on EDGAR
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Marc N. Casper - OfficerOpen-market sale$63K
