Thermo Fisher (NYSE: TMO) HR chief disposes shares to cover tax liability

Rhea-AI Filing Summary

Thermo Fisher Scientific senior vice president and chief HR officer Lisa P. Britt reported two tax-withholding share dispositions. She transferred 262.6700 and 85.4090 shares of common stock at $521.1100 per share to cover tax liabilities. After these transactions, she directly owned 14,784.1480 common shares.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Britt Lisa P.

Role Sr. VP and Chief HR Officer

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	262.67	$521.11	$137K
Tax Withholding	Common Stock	85.409	$521.11	$45K

Holdings After Transaction: Common Stock — 14,869.557 shares (Direct)

Footnotes (1)

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Britt Lisa P.

(Last) (First) (Middle)

168 THIRD AVENUE

(Street)

WALTHAM MA 02451

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
THERMO FISHER SCIENTIFIC INC. [ TMO ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Sr. VP and Chief HR Officer

3. Date of Earliest Transaction (Month/Day/Year)
02/28/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	02/28/2026		F		262.67	D	$521.11	14,869.557	D
Common Stock	02/28/2026		F		85.409	D	$521.11	14,784.148	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	/s/ Melodie T. Morin, Attorney-in-Fact for Lisa P. Britt	03/02/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did Thermo Fisher (TMO) executive Lisa P. Britt report on this Form 4?

Lisa P. Britt reported two tax-withholding dispositions of Thermo Fisher common stock. She transferred 262.6700 and 85.4090 shares at $521.1100 per share to satisfy tax obligations related to equity compensation, rather than conducting open-market sales for investment purposes.

How many Thermo Fisher (TMO) shares does Lisa P. Britt own after the reported transactions?

After the reported transactions, Lisa P. Britt directly owns 14,784.1480 Thermo Fisher common shares. This figure reflects her holdings following the two tax-withholding dispositions reported on the Form 4, and represents her remaining direct equity stake as disclosed in the filing.

Were the Thermo Fisher (TMO) Form 4 transactions open-market sales?

No, the transactions were coded “F,” indicating tax-withholding dispositions. Shares were delivered to cover tax liabilities associated with equity compensation, not sold in the open market for discretionary portfolio reasons or as traditional buy or sell transactions by the executive.

What was the price per share used in Lisa P. Britt’s Thermo Fisher (TMO) tax-withholding transactions?

The transactions used a price of $521.1100 per Thermo Fisher common share. This price was applied to the 262.6700 and 85.4090 shares delivered to satisfy tax obligations, as disclosed in the Form 4 transaction details and code description.

What does transaction code “F” mean on this Thermo Fisher (TMO) Form 4?

Transaction code “F” means shares were delivered to pay an exercise price or tax liability. In this case, Thermo Fisher executive Lisa P. Britt used common stock to satisfy tax obligations arising from equity awards, instead of paying those taxes in cash.