Lisa P. Britt - 25 Feb 2026 Form 4 Insider Report for THERMO FISHER SCIENTIFIC INC. (TMO)

Role: Sr. VP and Chief HR Officer
Signature: /s/ Melodie T. Morin, Attorney-in-Fact for Lisa P. Britt
Issuer symbol: TMO
Transactions as of: 25 Feb 2026
Net transactions value: $0
Form type: 4
Filing time: 27 Feb 2026, 17:08:04 UTC
Previous filing: 14 Nov 2025
Next filing: 02 Mar 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Britt Lisa P.	Sr. VP and Chief HR Officer	168 THIRD AVENUE, WALTHAM	/s/ Melodie T. Morin, Attorney-in-Fact for Lisa P. Britt	27 Feb 2026	0001676320

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	TMO	Common Stock	Award	$0	+872	+6.7%	$0.000000	13,959	25 Feb 2026	Direct	F1
transaction	TMO	Common Stock	Award	$0	+1,173	+8.4%	$0.000000	15,132	25 Feb 2026	Direct

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	TMO	Stock Option (Right to Buy)	Award	$0	+5,139		$0.000000	5,139	25 Feb 2026	Common Stock	5,139	$513.68	Direct	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Shares represent a performance-based restricted stock unit award granted on February 19, 2025. The Company's Compensation Committee determined on February 25, 2026, that the performance criteria related to this award were satisfied. One-third of the shares vest on February 28, 2026 and 2027. The remaining one-third will vest on February 28, 2028, and is subject to adjustment (positive or negative) for long-term performance which is based on the comparison of the Company's total shareholder return compound annual growth rate ("CAGR") to the total shareholder return CAGR of each of the companies in the peer group, as specified within the award agreement, over the measurement period starting on January 1, 2025, through to December 31, 2027.
F2	The option vests in four equal annual installments beginning on February 28, 2027.

Content

Shares represent a performance-based restricted stock unit award granted on February 19, 2025. The Company's Compensation Committee determined on February 25, 2026, that the performance criteria related to this award were satisfied. One-third of the shares vest on February 28, 2026 and 2027. The remaining one-third will vest on February 28, 2028, and is subject to adjustment (positive or negative) for long-term performance which is based on the comparison of the Company's total shareholder return compound annual growth rate ("CAGR") to the total shareholder return CAGR of each of the companies in the peer group, as specified within the award agreement, over the measurement period starting on January 1, 2025, through to December 31, 2027.

The option vests in four equal annual installments beginning on February 28, 2027.