Marc N. Casper - 24 Aug 2026 Form 4 Insider Report for THERMO FISHER SCIENTIFIC INC. (TMO)

Reporting relationship: Chairman & CEO, Director
Issuer ticker: TMO
Reported as of: 24 Aug 2026
Net transaction value: -$172,439
SEC form: 4
Accepted by SEC: 26 Aug 2026, 16:01:35 UTC
Prior SEC filing: 24 Aug 2026
Next SEC filing: 01 Sep 2026
Source filing: View source filing
Reporting owner signature: /s/ Melodie T. Morin, Attorney-in-Fact for Marc N. Casper

Key filing fact

Marc N. Casper filed Form 4 for THERMO FISHER SCIENTIFIC INC. (TMO) on 26 Aug 2026.

Key facts

This page summarizes Marc N. Casper's Form 4 filing for THERMO FISHER SCIENTIFIC INC. (TMO).
6 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 26 Aug 2026, 16:01.

Change

Previous filing in this sequence was filed on 24 Aug 2026.
Current net transaction value: -$172,439.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001216055 Primary reporting owner

CASPER MARC N

Relationship: Chairman & CEO, Director
Address: 168 THIRD AVENUE, WALTHAM
Signature: /s/ Melodie T. Morin, Attorney-in-Fact for Marc N. Casper
Signature date: 26 Aug 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

TMO transaction

Common Stock

Options Exercise

Transaction value
Shares: +275
Change %: +0.22%
Price: $309.63^*
Shares after: 124,200
Date: 24 Aug 2026
Ownership: Direct

TMO transaction

Common Stock

Sale

Transaction value: $63,166
Shares: -101
Change %: -0.08%
Price: $625.41
Shares after: 124,099
Date: 24 Aug 2026
Ownership: Direct
Footnotes: F1, F2

TMO transaction

Common Stock

Sale

Transaction value: $20,677
Shares: -33
Change %: -0.03%
Price: $626.59
Shares after: 124,066
Date: 24 Aug 2026
Ownership: Direct
Footnotes: F1, F3

TMO transaction

Common Stock

Sale

Transaction value: $49,613
Shares: -79
Change %: -0.06%
Price: $628.01
Shares after: 123,987
Date: 24 Aug 2026
Ownership: Direct
Footnotes: F1, F4

TMO transaction

Common Stock

Sale

Transaction value: $38,982
Shares: -62
Change %: -0.05%
Price: $628.74
Shares after: 123,925
Date: 24 Aug 2026
Ownership: Direct
Footnotes: F1, F5

TMO holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 5,000
Date: 24 Aug 2026
Ownership: By MNC 2020 Irrevocable Trust
Footnotes: F6

TMO holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 11,300
Date: 24 Aug 2026
Ownership: By Alison Casper 2020 Irrevocable Trust
Footnotes: F6

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

TMO transaction Derivative

Stock Option (Right to Buy)

Options Exercise

Transaction value
Shares: -275
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 24 Aug 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 275
Exercise price: $309.63
Footnotes: F7

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 7 footnotes

Footnote F1

The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on April 27, 2026.

Footnote F2

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $625.00 to $625.98, inclusive. The reporting person undertakes to provide to Thermo Fisher Scientific Inc. ("TMO"), any security holder of TMO or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2), (3), (4) and (5) to this Form 4.

Footnote F3

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $626.25 to $627.21, inclusive.

Footnote F4

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $627.43 to $628.34, inclusive.

Footnote F5

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $628.48 to $628.89, inclusive.

Footnote F6

The reporting person disclaims beneficial ownership of the securities reported herein as indirectly beneficially owned, except to the extent of any pecuniary interest therein.

Footnote F7

The option vested in four equal installments on February 25, 2021, 2022, 2023, and 2024.