Stephen Williamson - 28 Feb 2026 Form 4 Insider Report for THERMO FISHER SCIENTIFIC INC. (TMO)

Reporting relationship: Retiring Sr. VP and CFO
Issuer ticker: TMO
Reported as of: 28 Feb 2026
Net transaction value: -$480,356
SEC form: 4
Accepted by SEC: 02 Mar 2026, 16:04:53 UTC
Prior SEC filing: 27 Feb 2026
Next SEC filing: 16 Apr 2026
Source filing: View source filing
Reporting owner signature: /s/ Melodie T. Morin, Attorney-in-Fact for Stephen Williamson

Key filing fact

Stephen Williamson filed Form 4 for THERMO FISHER SCIENTIFIC INC. (TMO) on 02 Mar 2026.

Key facts

This page summarizes Stephen Williamson's Form 4 filing for THERMO FISHER SCIENTIFIC INC. (TMO).
2 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 02 Mar 2026, 16:04.

Change

Previous filing in this sequence was filed on 27 Feb 2026.
Current net transaction value: -$480,356.

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 0001648929 Primary reporting owner

Williamson Stephen

Relationship: Retiring Sr. VP and CFO
Address: 168 THIRD AVENUE, WALTHAM
Signature: /s/ Melodie T. Morin, Attorney-in-Fact for Stephen Williamson
Signature date: 02 Mar 2026

Reported non-derivative transactions

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

TMO transaction

Common Stock

Tax liability

Transaction value: $351,605
Shares: -675
Change %: -2%
Price: $521.11
Shares after: 32,746
Date: 28 Feb 2026
Ownership: Direct

TMO transaction

Common Stock

Tax liability

Transaction value: $128,750
Shares: -247
Change %: -0.75%
Price: $521.11
Shares after: 32,499
Date: 28 Feb 2026
Ownership: Direct

TMO holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 12,674
Date: 28 Feb 2026
Ownership: By SLAT
Footnotes: F1

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

Additional SEC filing notes

Filing notes and footnotes

Section 16 status

Stephen Williamson is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may still apply in specific circumstances.

Explanation of responses 1 footnote

Footnote F1

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