Thermo Fisher (NYSE: TMO) exec plans stock sale after $3.4M trade

Rhea-AI Filing Summary

THERMO FISHER SCIENTIFIC INC. (TMO) officer Lisa P. Britt has filed a Rule 144 notice for a planned sale of up to 11,440 shares of common stock through Fidelity Brokerage Services LLC on the NYSE, with an aggregate market value of about $7.01 million. Shares were acquired via a stock option exercise for cash. In the prior three months, Britt sold 5,850 shares for proceeds of $3,393,000.

Key Figures

Shares to be sold: 11,440 shares Aggregate market value of planned sale: $7,014,109.87 Shares outstanding: 369,747,286 shares +3 more

6 metrics

Shares to be sold 11,440 shares Planned sale of Thermo Fisher common stock under Rule 144

Aggregate market value of planned sale $7,014,109.87 Value of 11,440 shares of Thermo Fisher common stock to be sold

Shares outstanding 369,747,286 shares Thermo Fisher common shares outstanding as listed in the notice

Shares sold in past 3 months 5,850 shares Thermo Fisher common shares sold on 08/06/2026 by Lisa Britt

Proceeds from prior sale $3,393,000.00 Total proceeds from 5,850 Thermo Fisher shares sold on 08/06/2026

Proposed sale date 08/19/2026 Date listed for proposed Rule 144 sale of 11,440 shares

Key Terms

Rule 144, aggregate market value, stock option exercise, attorney-in-fact

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

aggregate market value financial

"Common | Fidelity Brokerage Services LLC ... | 11440 | 7014109.87 | 369747286"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

stock option exercise financial

"Common | 08/19/2026 | Stock Option Exercise | Issuer |"

A stock option exercise is the act of using a previously granted right to buy shares of a company's stock at a specific, predetermined price by paying that price and receiving the shares. It matters to investors because exercising changes who owns the shares (which can dilute existing ownership), can trigger taxable events and shift potential gains or losses, and affects voting power and the company’s outstanding share count—like turning a voucher into an actual product that becomes part of circulating supply.

attorney-in-fact regulatory

"as a duly authorized representative of ... as attorney-in-fact for Lisa Britt"

An attorney-in-fact is the person or entity given legal authority through a power of attorney to act on behalf of another for specific tasks, such as signing documents, voting shares, or handling transactions. For investors, this matters because it lets a trusted representative make timely decisions or complete paperwork when the owner cannot, much like handing keys to someone to run errands on your behalf—so checks on scope and limits of that authority are important.

FAQ

What does the Form 144 filing for THERMO FISHER SCIENTIFIC INC. (TMO) disclose?

It discloses that officer Lisa P. Britt plans to sell up to 11,440 shares of Thermo Fisher common stock under Rule 144 through Fidelity on the NYSE, following a recent prior sale.

How many TMO shares is Lisa P. Britt planning to sell under Rule 144?

Lisa P. Britt plans to sell up to 11,440 shares of Thermo Fisher common stock. The filing lists an aggregate market value of $7,014,109.87 for these shares, with Thermo Fisher having 369,747,286 shares outstanding.

What prior Thermo Fisher (TMO) stock sales has Lisa P. Britt reported?

Within the past three months, Lisa P. Britt sold 5,850 shares of Thermo Fisher common stock. The filing shows total proceeds of $3,393,000.00 from this earlier sale dated 08/06/2026.

How were the Thermo Fisher (TMO) shares to be sold by Lisa P. Britt acquired?

The shares to be sold were acquired via a stock option exercise from the issuer. The acquisition and proposed sale date are both listed as 08/19/2026, with the consideration described as cash.

What is the aggregate market value of the planned TMO share sale under this Form 144?

The planned sale of 11,440 shares of Thermo Fisher stock has an aggregate market value of $7,014,109.87. This figure is based on the price used in the Rule 144 notice for the proposed NYSE transaction.

How many Thermo Fisher (TMO) shares are outstanding according to this Form 144?

The Form 144 lists 369,747,286 Thermo Fisher common shares as outstanding. This number provides context for the relative size of the planned 11,440-share sale under Rule 144 by officer Lisa P. Britt.

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

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Available on EDGAR 08/19/2026 - 01:44 PM Accepted by SEC EDGAR 08/19/2026 - 01:44 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001676320
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	THERMO FISHER SCIENTIFIC INC.
SEC File Number	001-08002
Address of Issuer	168 THIRD AVENUE WALTHAM MASSACHUSETTS 02451
Phone	7816221000
Name of Person for Whose Account the Securities are To Be Sold	Britt Lisa P.
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	11440	7014109.87	369747286	08/19/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	08/19/2026	Stock Option Exercise	Issuer			11440	08/19/2026	Cash

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Lisa Britt 168 Third Avenue Waltham MA 02451	Common	08/06/2026	5850	3393000.00

144: Remarks and Signature

Remarks
Date of Notice	08/19/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Adam Gehring, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Lisa Britt
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)