Thermo Fisher HR chief sells 11,440 shares

THERMO FISHER SCIENTIFIC INC.

Rhea-AI Filing Summary

THERMO FISHER SCIENTIFIC INC. (TMO) reported an insider equity transaction by Lisa P. Britt, Sr. VP and Chief HR Officer. On August 19, 2026, she exercised stock options for 11,440 shares of common stock at an exercise price of $418.32 per share and then sold 11,440 shares of common stock at a weighted average price of $613.12 per share, with individual sale prices ranging from $613.09 to $613.49.

Insider Trade Summary

Exercise and Sale: 11,440 shares ($2.23M approx. pre-tax spread)

Exercise and Sale 3 txns

Insider Britt Lisa P.

Role Sr. VP and Chief HR Officer

Sold 11,440 shs ($7.01M)

Approx. gross sale proceeds $7.01M

Approx. exercise cost $4.79M

Approx. pre-tax spread $2.23M

Type	Security	Shares	Price	Value
Exercise	Stock Option (Right to Buy)	11,440	$0.00	$0.00
Exercise	Common Stock	11,440	$418.32	$4.79M
Sale	Common Stock F1	11,440	$613.12	$7.01M

Holdings After Transaction: Stock Option (Right to Buy) — 0 contracts (Direct); Common Stock — 14,784.148 shares (Direct)

Footnotes (1)

1. F1. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $613.09 to $613.49, inclusive. The reporting person undertakes to provide to Thermo Fisher Scientific Inc. ("TMO"), any security holder of TMO or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Key Figures

Options Exercised: 11,440 shares Option Exercise Price: $418.32 per share Common Shares Sold: 11,440 shares +3 more

6 metrics

Options Exercised 11,440 shares Stock Option (Right to Buy) exercised on August 19, 2026

Option Exercise Price $418.32 per share Exercise or conversion price for stock option into common stock

Common Shares Sold 11,440 shares Sale of common stock on August 19, 2026

Weighted Average Sale Price $613.12 per share Weighted average price for shares sold, with trades from $613.09 to $613.49

Option Expiration Date September 9, 2027 Expiration date of exercised stock option

Net Buy/Sell Shares 11,440 shares net-sell Reported in transaction summary for this Form 4

Key Terms

Stock Option (Right to Buy), weighted average price, derivative security

3 terms

Stock Option (Right to Buy) financial

"security_title: "Stock Option (Right to Buy)""

weighted average price financial

"The price reported in Column 4 is a weighted average price."

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

derivative security financial

"Exercise or conversion of derivative security"

A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.

FAQ

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

Who is the insider involved in this Form 4 for TMO and what is her role?

The insider is Lisa P. Britt, who serves as Sr. VP and Chief HR Officer of Thermo Fisher Scientific Inc. The filing reports her stock option exercise and subsequent sale of common shares.

What stock option exercise did Lisa P. Britt report for TMO?

Lisa P. Britt exercised a Stock Option (Right to Buy) covering 11,440 shares of Thermo Fisher common stock at an exercise price of $418.32 per share, with the option expiring on September 9, 2027.

How many TMO shares did Lisa P. Britt sell and at what price?

She sold 11,440 shares of Thermo Fisher common stock on August 19, 2026 at a weighted average price of $613.12 per share, with individual transaction prices ranging from $613.09 to $613.49.

Was the TMO transaction by Lisa P. Britt a net buy or net sell?

The filing reflects a net sale of 11,440 shares of Thermo Fisher common stock. She exercised options to acquire 11,440 shares and then sold 11,440 shares, resulting in net-sell activity for this Form 4.

Does the Form 4 indicate remaining option holdings for Lisa P. Britt at TMO?

For the reported option, the filing shows 0 derivative securities remaining following the exercise of 11,440 options. The derivative summary is otherwise empty in this filing.

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

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Accepted by SEC EDGAR 08/20/2026 - 04:02 PM EDT 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^*

Britt Lisa P.

(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)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/19/2026

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
Common Stock	08/19/2026		M		11,440	A	$418.32	26,224.148	D
Common Stock	08/19/2026		S		11,440	D	$613.12(1)	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
Stock Option (Right to Buy)	$418.32	08/19/2026		M			11,440	03/09/2024	09/09/2027	Common Stock	11,440	$0	0	D

Explanation of Responses:

1. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $613.09 to $613.49, inclusive. The reporting person undertakes to provide to Thermo Fisher Scientific Inc. ("TMO"), any security holder of TMO or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Remarks:

	/s/ Melodie T. Morin, Attorney-in-Fact for Lisa P. Britt	08/20/2026
	** 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)