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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) 111 113 Form 4 filings on record, the earliest from Oct 1, 2024, newest first. Filing history page 1 of 3.
Date Insider Transaction Security Shares Price Value Aug 24, 2026 MC Marc N. Casper - Officer Option exercise Common Stock
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 24, 2026 CASPER MARC N Officer, Director 275 $172K View on EDGAR Aug 21, 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.
Sign up free Aug 24, 2026
Market cap $230.05B
P/E ratio -
Dividend yield -
Average volume 2.15M
52 week high $647.00
52 week low $435.27
Today's high -
Today's low -
Open -
Volume -
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.
Aug 24, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 101 $625.41 $63K
Aug 24, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 33 $626.59 $21K
Aug 24, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 79 $628.01 $50K
Aug 24, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 62 $628.74 $39K
Aug 24, 2026 MC Marc N. Casper - Officer Option exercise Stock Option (Right to Buy) 275 $0.00 -
Aug 22, 2026 JM James Meyer - Officer Tax withholding / forfeiture Common Stock 30.95 $629.27 $19K
Aug 20, 2026 MC Marc N. Casper - Officer Option exercise Common Stock 10,000 $309.63 $3.10M
Aug 20, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 909 $625.45 $569K
Aug 20, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 821 $626.83 $515K
Aug 20, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 1,314 $627.66 $825K
Aug 20, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 2,601 $628.82 $1.64M
Aug 20, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 1,250 $629.85 $787K
Aug 20, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 1,035 $630.87 $653K
Aug 20, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 1,430 $632.01 $904K
Aug 20, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 560 $632.94 $354K
Aug 20, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 80 $633.99 $51K
Aug 21, 2026 MC Marc N. Casper - Officer Option exercise Common Stock 10,000 $309.63 $3.10M
Aug 21, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 2,727 $625.46 $1.71M
Aug 21, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 3,014 $626.51 $1.89M
Aug 21, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 1,791 $627.39 $1.12M
Aug 21, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 2,147 $628.61 $1.35M
Aug 21, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 321 $629.10 $202K
Aug 20, 2026 MC Marc N. Casper - Officer Option exercise Stock Option (Right to Buy) 10,000 $0.00 -
Aug 21, 2026 MC Marc N. Casper - Officer Option exercise Stock Option (Right to Buy) 10,000 $0.00 -
Aug 19, 2026 LB Lisa P. Britt - Officer Option exercise Common Stock 11,440 $418.32 $4.79M
Aug 19, 2026 LB Lisa P. Britt - Officer Open-market sale Common Stock 11,440 $613.12 $7.01M
Aug 19, 2026 LB Lisa P. Britt - Officer Option exercise Stock Option (Right to Buy) 11,440 $0.00 -
Aug 11, 2026 MS Michael D. Shafer - Officer Option exercise Common Stock 11,200 $309.63 $3.47M
Aug 11, 2026 MS Michael D. Shafer - Officer Open-market sale Common Stock 11,200 $600.00 $6.72M
Aug 11, 2026 MS Michael D. Shafer - Officer Option exercise Common Stock 14,300 $418.32 $5.98M
Aug 11, 2026 MS Michael D. Shafer - Officer Open-market sale Common Stock 14,300 $600.00 $8.58M
Aug 11, 2026 MS Michael D. Shafer - Officer Option exercise Stock Option (Right to Buy) 11,200 $0.00 -
Aug 11, 2026 MS Michael D. Shafer - Officer Option exercise Stock Option (Right to Buy) 14,300 $0.00 -
Aug 7, 2026 JH Joseph R. Holmes - Officer Option exercise Common Stock 420 $309.63 $130K
Aug 7, 2026 JH Joseph R. Holmes - Officer Open-market sale Common Stock 420 $584.81 $246K
Aug 7, 2026 JH Joseph R. Holmes - Officer Option exercise Stock Option (Right to Buy) 420 $0.00 -
Aug 7, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 18 $583.37 $11K
Aug 7, 2026 MC Marc N. Casper - Officer Option exercise Common Stock 275 $309.63 $85K
Aug 7, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 6 $577.37 $3K
Aug 7, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 4 $579.26 $2K
Aug 7, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 2 $579.27 $1K
Aug 7, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 4 $580.71 $2K
Aug 7, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 3 $580.72 $2K
Aug 7, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 5 $581.85 $3K
Aug 7, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 2 $581.86 $1K
Aug 7, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 63 $584.40 $37K
Aug 7, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 30 $585.42 $18K
Aug 7, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 58 $586.53 $34K
Aug 7, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 12 $587.64 $7K
Aug 7, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 32 $589.51 $19K
Aug 7, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 29 $590.77 $17K
Aug 7, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 7 $593.32 $4K
Aug 7, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 94 $577.37 $54K
Aug 7, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 114 $579.26 $66K
Aug 7, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 113 $580.71 $66K
Aug 7, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 113 $581.85 $66K
Aug 7, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 302 $583.35 $176K
Aug 7, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 1,035 $584.41 $605K
Aug 7, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 530 $585.44 $310K
Aug 7, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 945 $586.52 $554K
Aug 7, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 228 $587.64 $134K
Aug 7, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 522 $589.52 $308K
Aug 7, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 495 $590.78 $292K
Aug 7, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 117 $593.31 $69K
Aug 7, 2026 MC Marc N. Casper - Officer Option exercise Stock Option (Right to Buy) 275 $0.00 -
Aug 6, 2026 LB Lisa P. Britt - Officer Option exercise Common Stock 5,850 $309.63 $1.81M
Aug 6, 2026 LB Lisa P. Britt - Officer Open-market sale Common Stock 5,850 $580.00 $3.39M
Aug 6, 2026 LB Lisa P. Britt - Officer Option exercise Stock Option (Right to Buy) 5,850 $0.00 -
Aug 6, 2026 MC Marc N. Casper - Officer Option exercise Common Stock 10,000 $309.63 $3.10M
Aug 6, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 480 $571.05 $274K
Aug 6, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 1,631 $572.43 $934K
Aug 6, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 2,545 $573.53 $1.46M
Aug 6, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 1,617 $574.40 $929K
Aug 6, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 2,164 $575.46 $1.25M
Aug 6, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 480 $576.46 $277K
Aug 6, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 451 $577.43 $260K
Aug 6, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 321 $578.67 $186K
Aug 6, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 311 $579.90 $180K
Aug 6, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 240 $571.00 $137K
Aug 6, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 660 $572.33 $378K
Aug 6, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 1,200 $573.34 $688K
Aug 6, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 1,008 $574.28 $579K
Aug 6, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 1,060 $575.41 $610K
Aug 6, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 225 $576.09 $130K
Aug 6, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 361 $577.57 $209K
Aug 6, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 119 $578.93 $69K
Aug 6, 2026 MC Marc N. Casper - Officer Open-market sale Common Stock 127 $580.01 $74K
Aug 6, 2026 MC Marc N. Casper - Officer Option exercise Stock Option (Right to Buy) 10,000 $0.00 -
Jul 27, 2026 GP Gianluca Pettiti - Officer Open-market sale Common Stock 400 $565.00 $226K
Jun 27, 2026 DW Dion J. Weisler - Director Grant or award Phantom Stock Units 73.1 - -
Jun 27, 2026 KL Karen S. Lynch - Director Grant or award Phantom Stock Units 60.91 - -
May 20, 2026 DW Dion J. Weisler - Director Tax withholding / forfeiture Common Stock 80.29 $451.79 $36K
May 20, 2026 DW Dion J. Weisler - Director Grant or award Common Stock 499 $0.00 -
May 20, 2026 DS Debora L. Spar - Director Grant or award Common Stock 499 $0.00 -
May 20, 2026 KL Karen S. Lynch - Director Grant or award Common Stock 499 $0.00 -
May 20, 2026 TJ Tyler Jacks - Director Grant or award Common Stock 499 $0.00 -
May 20, 2026 RC Ruby R. Chandy - Director Grant or award Common Stock 499 $0.00 -
May 20, 2026 NC Nelson Chai - Director Grant or award Common Stock 499 $0.00 -
Apr 27, 2026 GP Gianluca Pettiti - Officer Open-market sale Common Stock 400 $462.66 $185K
Mar 28, 2026 KL Karen S. Lynch - Director Grant or award Phantom Stock Units 66.02 - -
Aug 20, 2026 CASPER MARC N Officer, Director 10,000 $6.29M View on EDGAR
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