Thermo Fisher Director Credited 55.56 Stock Units

A director's deferred retainers are credited quarterly as stock units, which are distributable as stock upon cessation of director service or a change of control.

Rhea-AI Filing Summary

Thermo Fisher Scientific Inc. director Dion J. Weisler acquired 55.56 Phantom Stock Units on September 26, 2026, credited under the Deferred Compensation Plan for Directors at $675.00 per unit. His direct position following the transaction was 2,846.55 Phantom Stock Units.

Insider Trade Summary

Grant/Award: 55.56 shares

Grant/Award 1 txn

Insider WEISLER DION J

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Phantom Stock Units F1, F2	55.56	--	--

Holdings After Transaction: Phantom Stock Units — 2,846.55 contracts (Direct)

Footnotes (2)

1. F1. Convertible into Common Stock on a 1-for-1 basis.
2. F2. Represents stock units credited to the Reporting Person's account as of September 26, 2026, at a price of $675.00 per unit pursuant to the Issuer's Deferred Compensation Plan for Directors (the "Plan"). Directors' retainers are deferred quarterly under the Plan as Common Stock units based on the closing price of the stock as of the quarter end. The shares are distributable as stock upon cessation of director service (for any reason) or a change of control.

Key Figures

Phantom Stock Units acquired: 55.56 units Price per unit: $675.00 per unit Direct Phantom Stock Units following transaction: 2,846.55 units +1 more

4 metrics

Phantom Stock Units acquired 55.56 units Credited September 26, 2026

Price per unit $675.00 per unit Price used to credit the stock units

Direct Phantom Stock Units following transaction 2,846.55 units Following the September 26, 2026 transaction

Conversion ratio 1-for-1 Phantom Stock Units convertible into Common Stock

Key Terms

Phantom Stock Units, Deferred Compensation Plan for Directors, change of control

3 terms

Phantom Stock Units financial

"stock units credited to the Reporting Person's account"

Phantom stock units are company promises that pay a cash or stock-equivalent award tied to the firm’s share price or value growth, but they do not issue actual shares. Think of them as a bonus check that moves with the stock like a mirror rather than handing over an ownership slice. Investors care because these awards can affect a company’s future cash obligations, executive incentives and reported expenses without causing share dilution.

Deferred Compensation Plan for Directors financial

"pursuant to the Issuer's Deferred Compensation Plan for Directors"

A deferred compensation plan for directors is an arrangement that lets board members postpone receiving part of their pay until a later date—often retirement or a set future time—so the money can grow or be paid under specified conditions. Think of it like directing a portion of your paycheck into a locked savings account that pays out later; investors care because it creates future cash or stock obligations, signals how the company motivates and retains leadership, and can affect shareholder value through timing of payouts or potential dilution.

change of control regulatory

"or a change of control"

A change of control occurs when the ownership or management of a company shifts significantly, such as through a sale, merger, or acquisition, resulting in new leadership or ownership structure. This change can impact the company's direction and decision-making, which is important for investors because it may affect the company's stability, strategy, and future prospects.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How do Thermo Fisher Scientific (TMO) Phantom Stock Units convert and when are they distributed?

The Phantom Stock Units are convertible into Common Stock on a 1-for-1 basis and are distributable as stock upon cessation of director service for any reason or a change of control. Directors' retainers are deferred quarterly under the plan as Common Stock units based on the stock's closing price as of quarter end.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/29/2026 - 04:14 PM Accepted by SEC EDGAR 09/29/2026 - 04:14 PM Learn about SEC filing dates

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^*

WEISLER DION J

(Last) (First) (Middle)

168 THIRD AVENUE

(Street)

WALTHAM MASSACHUSETTS 02451

(City) (State) (Zip)

UNITED STATES

(Country)

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

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

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/26/2026

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

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

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

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

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
Phantom Stock Units	(1)	09/26/2026		A		55.56		(2)	(2)	Common Stock	55.56	(2)	2,846.55	D

Explanation of Responses:

1. Convertible into Common Stock on a 1-for-1 basis.

2. Represents stock units credited to the Reporting Person's account as of September 26, 2026, at a price of $675.00 per unit pursuant to the Issuer's Deferred Compensation Plan for Directors (the "Plan"). Directors' retainers are deferred quarterly under the Plan as Common Stock units based on the closing price of the stock as of the quarter end. The shares are distributable as stock upon cessation of director service (for any reason) or a change of control.

Remarks:

	/s/ Melodie T. Morin, Attorney-in-Fact for Dion J. Weisler	09/29/2026
	** 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.
* Form 4: SEC 1474 (03-26)