[Form 4] THERMO FISHER SCIENTIFIC INC. Insider Trading Activity

Rhea-AI Filing Summary

Thermo Fisher Scientific Inc. (TMO) senior vice president and chief financial officer Stephen Williamson reported an insider transaction involving company common stock. On 11/14/2025, he transferred 433 shares of Thermo Fisher common stock in a transaction coded "G," which indicates a gift, at a reported price of $0 per share. Following this transaction, he beneficially owned 31,887.193 shares of common stock directly. He also had 12,674 shares reported as indirectly owned through a SLAT, and he disclaims beneficial ownership of those indirect shares except to the extent of any pecuniary interest.

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
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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^*

Williamson Stephen

(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 CFO

3. Date of Earliest Transaction (Month/Day/Year)
11/14/2025

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	11/14/2025		G		433	D	$0	31,887.193	D
Common Stock								12,674	I	By SLAT(1)

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:

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

	/s/ Melodie T. Morin, Attorney-in-Fact for Stephen Williamson	11/17/2025
	** 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 insider transaction did Thermo Fisher Scientific (TMO) report for Stephen Williamson?

Stephen Williamson, senior vice president and CFO of Thermo Fisher Scientific (TMO), reported a transaction on 11/14/2025 coded "G," indicating a gift of 433 shares of common stock at a reported price of $0 per share.

How many Thermo Fisher (TMO) shares did Stephen Williamson gift?

Stephen Williamson reported a gift of 433 shares of Thermo Fisher Scientific common stock on 11/14/2025, with the transaction coded as "G" for a gift.

How many Thermo Fisher (TMO) shares does Stephen Williamson own after the reported transaction?

After the 11/14/2025 gift, Stephen Williamson beneficially owned 31,887.193 shares directly of Thermo Fisher common stock and 12,674 shares indirectly through a SLAT.

What is Stephen Williamson’s role at Thermo Fisher Scientific (TMO)?

Stephen Williamson is reported as an officer of Thermo Fisher Scientific, serving as Senior Vice President and Chief Financial Officer (Sr. VP and CFO).

How is indirect ownership reported for Stephen Williamson’s Thermo Fisher (TMO) shares?

Stephen Williamson reports 12,674 shares as indirectly owned through a SLAT and disclaims beneficial ownership of those securities except to the extent of any pecuniary interest.

Is this Thermo Fisher (TMO) Form 4 filed by one or multiple reporting persons?

This Form 4 is indicated as being filed by one reporting person, reflecting the holdings and transaction of Stephen Williamson alone.

What does transaction code "G" mean in the Thermo Fisher (TMO) Form 4?

In this Form 4, transaction code "G" is used, which indicates that the 433 Thermo Fisher shares reported were transferred as a gift.