Was Gianluca Pettiti’s Thermo Fisher (TMO) share sale under a Rule 10b5-1 plan?

Yes. The Form 4 footnote states the transactions were effected under a Rule 10b5-1 trading plan. That plan was adopted by the reporting person on September 12, 2025, indicating the April 27, 2026 sale was pre-arranged rather than a spontaneous market decision.

Thermo Fisher (NYSE: TMO) COO executes 400-share Rule 10b5-1 sale

Filing Impact

(High)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

Thermo Fisher Scientific President & COO Gianluca Pettiti sold 400 shares of Common Stock in an open-market transaction. The sale occurred on April 27, 2026 at a price of $462.66 per share. The transaction was made under a Rule 10b5-1 trading plan adopted on September 12, 2025. After this sale, Pettiti continues to hold 25,050.832 shares of Thermo Fisher Scientific Common Stock directly.

Insider Trade Summary 10b5-1

Net Seller: 400 shares ($185,064)

Net Sell 1 txn

Insider Pettiti Gianluca

Role President & COO

Sold 400 shs ($185K)

Type	Security	Shares	Price	Value
Sale	Common Stock	400	$462.66	$185K

Holdings After Transaction: Common Stock — 25,050.832 shares (Direct, null)

Footnotes (1)

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Key Figures

Shares sold: 400 shares Sale price: $462.66 per share Shares held after sale: 25,050.832 shares +1 more

4 metrics

Shares sold 400 shares Open-market sale of Common Stock on April 27, 2026

Sale price $462.66 per share Execution price for the 400-share sale

Shares held after sale 25,050.832 shares Direct Common Stock ownership following the transaction

Trading plan adoption date September 12, 2025 Adoption date of Rule 10b5-1 trading plan used for sale

Key Terms

Rule 10b5-1 trading plan, open-market sale, Common Stock, Form 4

4 terms

Rule 10b5-1 trading plan regulatory

"The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted..."

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

open-market sale financial

"transaction_action": "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Common Stock financial

"security_title": "Common Stock""

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

Form 4 regulatory

"The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan..."

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

Form 4 Insider Transactions: What Each Field Means →

04/29/2026 - 04:38 PM

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^*

Pettiti Gianluca

(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)
	President & COO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/27/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	04/27/2026		S⁽¹⁾		400	D	$462.66	25,050.832	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 12, 2025.

	/s/ Melodie T. Morin, Attorney-in-Fact for Gianluca Pettiti	04/29/2026
	** 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)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transaction did Thermo Fisher (TMO) President & COO Gianluca Pettiti report?

Gianluca Pettiti reported selling 400 shares of Thermo Fisher Common Stock in an open-market transaction. The sale took place on April 27, 2026 at a price of $462.66 per share and was executed under a pre-established Rule 10b5-1 trading plan.

At what price did Thermo Fisher (TMO) insider Gianluca Pettiti sell his shares?

He sold 400 shares at $462.66 per share in an open-market sale. This price applies to the April 27, 2026 transaction reported in the Form 4 and reflects the execution price disclosed for this specific planned trade under his Rule 10b5-1 plan.

How many Thermo Fisher (TMO) shares does Gianluca Pettiti hold after this Form 4 sale?

Following the reported transaction, Gianluca Pettiti directly holds 25,050.832 shares of Thermo Fisher Common Stock. This post-transaction balance comes from the Form 4 disclosure and shows his remaining direct ownership after selling 400 shares in the open-market transaction.

What type of security did Thermo Fisher (TMO) insider Gianluca Pettiti sell?

He sold Thermo Fisher Scientific Inc. Common Stock, as specified in the Form 4. The filing identifies the security title as Common Stock and classifies the transaction as a non-derivative, open-market sale of 400 shares at a disclosed price per share.