Thermo Fisher Scientific Inc. (TMO) insider trading

Recent insider transactions reported to the SEC on Form 4 — directors and officers buying or selling their own company’s stock. Sourced directly from public SEC filings, latest filed Sep 29, 2026.

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Filings shown
23
Open-market buys
0
Open-market sells
93

Counts cover the 23 most recent Form 4 filings Tradune holds for TMO (filed Jul 28 – Sep 29, 2026). No completed check of TMO's Form 4 list on SEC EDGAR is on record yet; the latest TMO filing Tradune holds was filed Sep 29, 2026. This is not guaranteed to be the complete record — see TMO's full Form 4 filing history on SEC EDGAR.

Open-market activity, last 90 days

Purchases (Form 4 code P) and sales (code S) on the 23 filings Tradune holds for TMO filed Jul 28 – Sep 29, 2026. Grants, exercises, tax withholding and the other Form 4 transaction codes are left out.

93 open-market sales by Rule 10b5-1 checkbox

On filings with the 10b5-1 box checked
90 sales· 85,191 sh
checkbox disclosed
On filings with the box not checked
3 sales· 17,710 sh
not proof that no plan exists
Not comparable
0 sales· 0 sh
filed before Apr 1, 2023, or no checkbox value in the filing data

Counts are Form 4 lines as filed. The checkbox is one per filing, so every sale on a filing with the box checked is counted there even if only some of its transactions were under a plan; it records what the filer disclosed, and the three categories are not a judgement about why a sale was made.

Open-market purchases and sales by insider
Insider Buys Sells Shares bought Shares sold Value
Marc N. CasperChairman & CEO 0 85 — 55,158 −$32,841,664
Gianluca PettitiPresident & COO 0 3 — 4,533 −$2,765,233
Michael D. ShaferExecutive Vice President 0 2 — 25,500 −$15,300,000
Lisa P. BrittSr. VP and Chief HR Officer 0 2 — 17,290 −$10,407,093
Joseph R. HolmesVP & Chief Accounting Officer 0 1 — 420 −$245,620

Value = shares × the price reported on each Form 4 (+ purchases, − sales); every open-market line in this window disclosed a price.

Insider-activity score
0/ 100
Net insider sales
0 distinct buyers0 buy · 93 sell tx

Summarises ~90 days of public SEC Form 4 activity — more distinct buyers, officer involvement and net buying score higher. A description of filing activity, not a rating or buy signal. How this score is computed →

How to read this: an open-market purchase (Form 4 code P) is a buy at the market price with the insider’s own money, as opposed to a grant, award or option exercise; an open-market sale is code S. When two or more distinct insiders report open-market purchases in the same 90-day window, this site labels that a cluster — a definition, not a forecast; see insider cluster buying. “Held after” is Form 4 Table I column 5; “Change” = shares ÷ holdings before the trade (held after − shares for an acquisition, held after + shares for a disposition).

Insider Buying at TMO

No open-market insider purchases (Form 4 code P) were reported for TMO in the trailing 90 days. The filings below may include other transaction types — sales, grants, option exercises, and tax withholding — shown for completeness; they are not open-market purchases.

Recent Form 4 filings

Source: SEC EDGAR Form 4 · transaction codes explained

R. Alexandra Keith Director · filed Sep 29, 2026 · SEC ↗
TransactionSharesPriceHeld afterChange†Date
Grant / award Phantom Stock Units 46 — — — Sep 26, 2026
Dion J. Weisler Director · filed Sep 29, 2026 · SEC ↗
TransactionSharesPriceHeld afterChange†Date
Grant / award Phantom Stock Units 56 — — — Sep 26, 2026
Karen S. Lynch Director · filed Sep 29, 2026 · SEC ↗
TransactionSharesPriceHeld afterChange†Date
Grant / award Phantom Stock Units 46 — — — Sep 26, 2026
Scott M. Sperling Director · filed Sep 29, 2026 · SEC ↗
TransactionSharesPriceHeld afterChange†Date
Grant / award Phantom Stock Units 63 — — — Sep 26, 2026
Jennifer M. Johnson Director · filed Sep 29, 2026 · SEC ↗
TransactionSharesPriceHeld afterChange†Date
Grant / award Phantom Stock Units 46 — — — Sep 26, 2026
Gianluca Pettiti President & COO · filed Sep 1, 2026 · SEC ↗
TransactionSharesPriceHeld afterChange†Date
Option exercise 3,733 $309.63 26,949 +16% Aug 31, 2026
Open-market sale 10b5-1 box checked 3,733 $614.38 23,216 −14% Aug 31, 2026
Option exercise Stock Option (Right to Buy) 3,733 — — — Aug 31, 2026
Open-market sale 10b5-1 box checked 400 $614.38 23,216 −1.7% Aug 31, 2026
Tax withholding 212 $622.18 24,439 −0.9% Aug 28, 2026
Tax withholding 304 $622.18 24,135 −1.2% Aug 28, 2026
Tax withholding 249 $622.18 23,886 −1.0% Aug 28, 2026
Tax withholding 270 $622.18 23,616 −1.1% Aug 28, 2026

† change in this filer’s own reported holding line (Form 4 Table I, col. 5), not of total company ownership; small prior holdings produce large percentages, so under 100 shares the prior holding is shown instead.

“10b5-1 box checked” = the filer checked the Form 4 box stating that a transaction on the filing was made under a plan intended to satisfy Rule 10b5-1(c); “10b5-1 box not checked” = the box was left blank, which does not prove that no plan exists. The box applies to Form 4s filed from April 1, 2023; older filings, and boxes we could not read, carry no tag. What the 10b5-1 box means.

Marc N. Casper Chairman & CEO · filed Sep 1, 2026 · SEC ↗
TransactionSharesPriceHeld afterChange†Date
Tax withholding 725 $622.18 123,201 −0.6% Aug 28, 2026
Tax withholding 532 $622.18 122,669 −0.4% Aug 28, 2026
James Meyer Sr. Vice President & CFO · filed Sep 1, 2026 · SEC ↗
TransactionSharesPriceHeld afterChange†Date
Tax withholding 20 $622.18 5,729 −0.3% Aug 28, 2026
Tax withholding 55 $622.18 5,673 −1.0% Aug 28, 2026
Tax withholding 114 $622.18 5,560 −2.0% Aug 28, 2026
Tax withholding 44 $622.18 5,748 −0.8% Aug 28, 2026
Tax withholding 37 $622.18 5,793 −0.6% Aug 28, 2026
Thomas B. Shropshire Jr. SVP and General Counsel · filed Sep 1, 2026 · SEC ↗
TransactionSharesPriceHeld afterChange†Date
Tax withholding 49 $622.18 6,009 −0.8% Aug 28, 2026
Michael D. Shafer Executive Vice President · filed Sep 1, 2026 · SEC ↗
TransactionSharesPriceHeld afterChange†Date
Tax withholding 162 $622.18 20,832 −0.8% Aug 28, 2026
Tax withholding 211 $622.18 20,621 −1.0% Aug 28, 2026
Tax withholding 190 $622.18 20,431 −0.9% Aug 28, 2026
Tax withholding 227 $622.18 20,204 −1.1% Aug 28, 2026
Joseph R. Holmes VP & Chief Accounting Officer · filed Sep 1, 2026 · SEC ↗
TransactionSharesPriceHeld afterChange†Date
Tax withholding 15 $622.18 2,916 −0.5% Aug 28, 2026
Tax withholding 11 $622.18 2,956 −0.4% Aug 28, 2026
Tax withholding 13 $622.18 2,943 −0.4% Aug 28, 2026
Tax withholding 11 $622.18 2,931 −0.4% Aug 28, 2026
Lisa P. Britt Sr. VP and Chief HR Officer · filed Sep 1, 2026 · SEC ↗
TransactionSharesPriceHeld afterChange†Date
Tax withholding 87 $622.18 14,697 −0.6% Aug 28, 2026
Tax withholding 116 $622.18 14,581 −0.8% Aug 28, 2026
Tax withholding 105 $622.18 14,476 −0.7% Aug 28, 2026
Tax withholding 85 $622.18 14,391 −0.6% Aug 28, 2026
Marc N. Casper Chairman & CEO · filed Aug 26, 2026 · SEC ↗
TransactionSharesPriceHeld afterChange†Date
Option exercise Stock Option (Right to Buy) 275 — — — Aug 24, 2026
Option exercise 275 $309.63 124,200 +0.2% Aug 24, 2026
Open-market sale 10b5-1 box checked 101 $625.41 124,099 −0.1% Aug 24, 2026
Open-market sale 10b5-1 box checked 33 $626.59 124,066 −0.0% Aug 24, 2026
Open-market sale 10b5-1 box checked 79 $628.01 123,987 −0.1% Aug 24, 2026
Open-market sale 10b5-1 box checked 62 $628.74 123,925 −0.1% Aug 24, 2026
James Meyer Sr. Vice President & CFO · filed Aug 24, 2026 · SEC ↗
TransactionSharesPriceHeld afterChange†Date
Tax withholding 31 $629.27 5,830 −0.5% Aug 22, 2026
Marc N. Casper Chairman & CEO · filed Aug 24, 2026 · SEC ↗
TransactionSharesPriceHeld afterChange†Date
Open-market sale 10b5-1 box checked 1,791 $627.39 126,393 −1.4% Aug 21, 2026
Option exercise 10,000 $309.63 133,925 +8.1% Aug 21, 2026
Open-market sale 10b5-1 box checked 2,727 $625.46 131,198 −2.0% Aug 21, 2026
Open-market sale 10b5-1 box checked 3,014 $626.51 128,184 −2.3% Aug 21, 2026
Open-market sale 10b5-1 box checked 2,147 $628.61 124,246 −1.7% Aug 21, 2026
Open-market sale 10b5-1 box checked 321 $629.10 123,925 −0.3% Aug 21, 2026
Option exercise Stock Option (Right to Buy) 10,000 — — — Aug 21, 2026
Open-market sale 10b5-1 box checked 1,430 $632.01 124,565 −1.1% Aug 20, 2026
Open-market sale 10b5-1 box checked 560 $632.94 124,005 −0.4% Aug 20, 2026
Open-market sale 10b5-1 box checked 80 $633.99 123,925 −0.1% Aug 20, 2026
Option exercise 10,000 $309.63 133,925 +8.1% Aug 20, 2026
Option exercise Stock Option (Right to Buy) 10,000 — — — Aug 20, 2026
Open-market sale 10b5-1 box checked 909 $625.45 133,016 −0.7% Aug 20, 2026
Open-market sale 10b5-1 box checked 821 $626.83 132,195 −0.6% Aug 20, 2026
Open-market sale 10b5-1 box checked 1,314 $627.66 130,881 −1.0% Aug 20, 2026
Open-market sale 10b5-1 box checked 2,601 $628.82 128,280 −2.0% Aug 20, 2026
Open-market sale 10b5-1 box checked 1,250 $629.85 127,030 −1.0% Aug 20, 2026
Open-market sale 10b5-1 box checked 1,035 $630.87 125,995 −0.8% Aug 20, 2026
Lisa P. Britt Sr. VP and Chief HR Officer · filed Aug 20, 2026 · SEC ↗
TransactionSharesPriceHeld afterChange†Date
Option exercise 11,440 $418.32 26,224 +77% Aug 19, 2026
Open-market sale 10b5-1 box not checked 11,440 $613.12 14,784 −44% Aug 19, 2026
Option exercise Stock Option (Right to Buy) 11,440 — — — Aug 19, 2026
Michael D. Shafer Executive Vice President · filed Aug 13, 2026 · SEC ↗
TransactionSharesPriceHeld afterChange†Date
Option exercise 14,300 $418.32 35,294 +68% Aug 11, 2026
Option exercise Stock Option (Right to Buy) 14,300 — — — Aug 11, 2026
Open-market sale 10b5-1 box checked 14,300 $600.00 20,994 −41% Aug 11, 2026
Option exercise Stock Option (Right to Buy) 11,200 — — — Aug 11, 2026
Option exercise 11,200 $309.63 32,194 +53% Aug 11, 2026
Open-market sale 10b5-1 box checked 11,200 $600.00 20,994 −35% Aug 11, 2026
Joseph R. Holmes VP & Chief Accounting Officer · filed Aug 10, 2026 · SEC ↗
TransactionSharesPriceHeld afterChange†Date
Option exercise 420 $309.63 3,386 +14% Aug 7, 2026
Open-market sale 10b5-1 box not checked 420 $584.81 2,966 −12% Aug 7, 2026
Option exercise Stock Option (Right to Buy) 420 — — — Aug 7, 2026
Marc N. Casper Chairman & CEO · filed Aug 10, 2026 · SEC ↗
TransactionSharesPriceHeld afterChange†Date
Open-market sale 10b5-1 box checked 1,035 $584.41 2,837 (indirect) −27% Aug 7, 2026
Option exercise 275 $309.63 124,200 +0.2% Aug 7, 2026
Open-market sale 10b5-1 box checked 6 $577.37 124,194 −0.0% Aug 7, 2026
Open-market sale 10b5-1 box checked 4 $579.26 124,190 −0.0% Aug 7, 2026
Open-market sale 10b5-1 box checked 2 $579.27 124,188 −0.0% Aug 7, 2026
Open-market sale 10b5-1 box checked 4 $580.71 124,184 −0.0% Aug 7, 2026
Open-market sale 10b5-1 box checked 3 $580.72 124,181 −0.0% Aug 7, 2026
Open-market sale 10b5-1 box checked 5 $581.85 124,176 −0.0% Aug 7, 2026
Open-market sale 10b5-1 box checked 2 $581.86 124,174 −0.0% Aug 7, 2026
Open-market sale 10b5-1 box checked 18 $583.37 124,156 −0.0% Aug 7, 2026
Open-market sale 10b5-1 box checked 63 $584.40 124,093 −0.1% Aug 7, 2026
Open-market sale 10b5-1 box checked 30 $585.42 124,063 −0.0% Aug 7, 2026
Open-market sale 10b5-1 box checked 58 $586.53 124,005 −0.0% Aug 7, 2026
Open-market sale 10b5-1 box checked 12 $587.64 123,993 −0.0% Aug 7, 2026
Open-market sale 10b5-1 box checked 32 $589.51 123,961 −0.0% Aug 7, 2026
Open-market sale 10b5-1 box checked 29 $590.77 123,932 −0.0% Aug 7, 2026
Open-market sale 10b5-1 box checked 7 $593.32 123,925 −0.0% Aug 7, 2026
Open-market sale 10b5-1 box checked 94 $577.37 4,514 (indirect) −2.0% Aug 7, 2026
Open-market sale 10b5-1 box checked 114 $579.26 4,400 (indirect) −2.5% Aug 7, 2026
Open-market sale 10b5-1 box checked 113 $580.71 4,287 (indirect) −2.6% Aug 7, 2026
Open-market sale 10b5-1 box checked 113 $581.85 4,174 (indirect) −2.6% Aug 7, 2026
Open-market sale 10b5-1 box checked 302 $583.35 3,872 (indirect) −7.2% Aug 7, 2026
Open-market sale 10b5-1 box checked 530 $585.44 2,307 (indirect) −19% Aug 7, 2026
Open-market sale 10b5-1 box checked 945 $586.52 1,362 (indirect) −41% Aug 7, 2026
Open-market sale 10b5-1 box checked 228 $587.64 1,134 (indirect) −17% Aug 7, 2026
Open-market sale 10b5-1 box checked 522 $589.52 612 (indirect) −46% Aug 7, 2026
Open-market sale 10b5-1 box checked 495 $590.78 117 (indirect) −81% Aug 7, 2026
Open-market sale 10b5-1 box checked 117 $593.31 0 (indirect) −100% Aug 7, 2026
Option exercise Stock Option (Right to Buy) 275 — — — Aug 7, 2026
Marc N. Casper Chairman & CEO · filed Aug 7, 2026 · SEC ↗
TransactionSharesPriceHeld afterChange†Date
Option exercise 10,000 $309.63 133,925 +8.1% Aug 6, 2026
Open-market sale 10b5-1 box checked 480 $571.05 133,445 −0.4% Aug 6, 2026
Open-market sale 10b5-1 box checked 1,631 $572.43 131,814 −1.2% Aug 6, 2026
Open-market sale 10b5-1 box checked 2,545 $573.53 129,269 −1.9% Aug 6, 2026
Open-market sale 10b5-1 box checked 1,617 $574.40 127,652 −1.3% Aug 6, 2026
Open-market sale 10b5-1 box checked 2,164 $575.46 125,488 −1.7% Aug 6, 2026
Open-market sale 10b5-1 box checked 480 $576.46 125,008 −0.4% Aug 6, 2026
Open-market sale 10b5-1 box checked 451 $577.43 124,557 −0.4% Aug 6, 2026
Open-market sale 10b5-1 box checked 321 $578.67 124,236 −0.3% Aug 6, 2026
Open-market sale 10b5-1 box checked 311 $579.90 123,925 −0.3% Aug 6, 2026
Open-market sale 10b5-1 box checked 240 $571.00 9,368 (indirect) −2.5% Aug 6, 2026
Open-market sale 10b5-1 box checked 660 $572.33 8,708 (indirect) −7.0% Aug 6, 2026
Open-market sale 10b5-1 box checked 1,200 $573.34 7,508 (indirect) −14% Aug 6, 2026
Open-market sale 10b5-1 box checked 1,008 $574.28 6,500 (indirect) −13% Aug 6, 2026
Open-market sale 10b5-1 box checked 1,060 $575.41 5,440 (indirect) −16% Aug 6, 2026
Open-market sale 10b5-1 box checked 225 $576.09 5,215 (indirect) −4.1% Aug 6, 2026
Open-market sale 10b5-1 box checked 361 $577.57 4,854 (indirect) −6.9% Aug 6, 2026
Open-market sale 10b5-1 box checked 119 $578.93 4,735 (indirect) −2.5% Aug 6, 2026
Open-market sale 10b5-1 box checked 127 $580.01 4,608 (indirect) −2.7% Aug 6, 2026
Option exercise Stock Option (Right to Buy) 10,000 — — — Aug 6, 2026
Lisa P. Britt Sr. VP and Chief HR Officer · filed Aug 7, 2026 · SEC ↗
TransactionSharesPriceHeld afterChange†Date
Option exercise 5,850 $309.63 20,634 +40% Aug 6, 2026
Open-market sale 10b5-1 box not checked 5,850 $580.00 14,784 −28% Aug 6, 2026
Option exercise Stock Option (Right to Buy) 5,850 — — — Aug 6, 2026
Marc N. Casper Chairman & CEO · filed Aug 7, 2026 · SEC ↗
TransactionSharesPriceHeld afterChange†Date
Option exercise 10,000 $309.63 133,925 +8.1% Aug 5, 2026
Open-market sale 10b5-1 box checked 157 $566.25 133,768 −0.1% Aug 5, 2026
Open-market sale 10b5-1 box checked 130 $567.92 133,638 −0.1% Aug 5, 2026
Open-market sale 10b5-1 box checked 105 $569.24 133,533 −0.1% Aug 5, 2026
Open-market sale 10b5-1 box checked 53 $569.76 133,480 −0.0% Aug 5, 2026
Open-market sale 10b5-1 box checked 135 $571.49 133,345 −0.1% Aug 5, 2026
Open-market sale 10b5-1 box checked 431 $573.08 132,914 −0.3% Aug 5, 2026
Open-market sale 10b5-1 box checked 1,186 $574.03 131,728 −0.9% Aug 5, 2026
Open-market sale 10b5-1 box checked 2,223 $574.98 129,505 −1.7% Aug 5, 2026
Open-market sale 10b5-1 box checked 2,930 $576.05 126,575 −2.3% Aug 5, 2026
Open-market sale 10b5-1 box checked 2,575 $576.82 124,000 −2.0% Aug 5, 2026
Open-market sale 10b5-1 box checked 75 $577.56 123,925 −0.1% Aug 5, 2026
Open-market sale 10b5-1 box checked 79 $566.26 14,529 (indirect) −0.5% Aug 5, 2026
Open-market sale 10b5-1 box checked 66 $567.94 14,463 (indirect) −0.5% Aug 5, 2026
Open-market sale 10b5-1 box checked 38 $569.13 14,425 (indirect) −0.3% Aug 5, 2026
Open-market sale 10b5-1 box checked 40 $569.69 14,385 (indirect) −0.3% Aug 5, 2026
Open-market sale 10b5-1 box checked 68 $571.50 14,317 (indirect) −0.5% Aug 5, 2026
Open-market sale 10b5-1 box checked 216 $573.08 14,101 (indirect) −1.5% Aug 5, 2026
Open-market sale 10b5-1 box checked 590 $574.03 13,511 (indirect) −4.2% Aug 5, 2026
Open-market sale 10b5-1 box checked 1,113 $574.98 12,398 (indirect) −8.2% Aug 5, 2026
Open-market sale 10b5-1 box checked 1,464 $576.05 10,934 (indirect) −12% Aug 5, 2026
Open-market sale 10b5-1 box checked 1,289 $576.83 9,645 (indirect) −12% Aug 5, 2026
Open-market sale 10b5-1 box checked 37 $577.56 9,608 (indirect) −0.4% Aug 5, 2026
Option exercise Stock Option (Right to Buy) 10,000 — — — Aug 5, 2026
Gianluca Pettiti President & COO · filed Jul 28, 2026 · SEC ↗
TransactionSharesPriceHeld afterChange†Date
Open-market sale 10b5-1 box checked 400 $565.00 24,651 −1.6% Jul 27, 2026

Insider filings reported around the same time

Other companies whose most recent Form 4 was filed closest to TMO's (Sep 29, 2026).

Frequently asked about TMO insider activity

How many insiders bought TMO stock in the last 90 days?

No open-market purchases (Form 4 code P) of TMO shares were reported by Thermo Fisher Scientific Inc. insiders in the trailing 90 days. The 23 filings shown on this page cover other transaction types — sales, grants, option exercises, and tax withholding.

Who filed the most recent Form 4 for TMO?

The most recent Form 4 on this page was filed by Jennifer M. Johnson (Director) on Sep 29, 2026, reporting 1 transaction. The original document is linked from the filing list above on SEC EDGAR. Amended filings (Form 4/A) may later revise reported figures.

What was the largest open-market TMO insider sale shown?

The largest open-market sale among the filings shown was 14,300 TMO shares at $600.00 (about $8,580,000) by Michael D. Shafer (Executive Vice President) on Aug 11, 2026. Value is shares × the price reported on the Form 4; that Form 4 has the Rule 10b5-1 box checked.

New to Form 4s? The transaction codes, the 90-day window and the 0–100 score are defined on the insider-activity score methodology page.

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This score summarizes SEC Form 4 filing activity over the trailing 90 days. It is descriptive, not predictive — not a rating, recommendation, or investment advice. Data: SEC EDGAR (public domain), as filed; amendments may revise figures. Tradune is not a registered investment adviser.

Data as filed; amended filings (Form 4/A) may revise figures. Sales may occur under prearranged Rule 10b5-1 trading plans.