Thermo Fisher (NYSE: TMO) CEO lines up new sale after $6M August trades

Rhea-AI Filing Summary

THERMO FISHER SCIENTIFIC INC. (TMO) is the issuer for which Marc N. Casper filed a Rule 144 notice to sell common stock. The filing lists a planned sale of 275 shares on 08/24/2026 following a stock option exercise, with Fidelity Brokerage Services LLC as broker. It also reports several prior sales in the last three months by Marc N. Casper and Floral Park Associates Inc., including multiple 10,000-share transactions of Thermo Fisher common stock.

Key Figures

Planned shares to be sold: 275 shares Value of 08/05/2026 sale by Marc N. Casper: $5,752,296.00 Value of 08/06/2026 sale by Marc N. Casper: $5,744,685.00 +5 more

8 metrics

Planned shares to be sold 275 shares Common stock sale planned for 08/24/2026 following Stock Option Exercise

Value of 08/05/2026 sale by Marc N. Casper $5,752,296.00 Sale of 10,000 shares of Thermo Fisher Scientific common stock on 08/05/2026

Value of 08/06/2026 sale by Marc N. Casper $5,744,685.00 Sale of 10,000 shares of Thermo Fisher Scientific common stock on 08/06/2026

Value of 08/20/2026 sale by Marc N. Casper $6,292,653.00 Sale of 10,000 shares of Thermo Fisher Scientific common stock on 08/20/2026

Value of 08/21/2026 sale by Marc N. Casper $6,269,123.00 Sale of 10,000 shares of Thermo Fisher Scientific common stock on 08/21/2026

Value of 08/05/2026 sale by Floral Park Associates Inc $2,876,145.43 Sale of 5,000 shares of Thermo Fisher Scientific common stock on 08/05/2026

Value of 08/06/2026 sale by Floral Park Associates Inc $2,872,267.69 Sale of 5,000 shares of Thermo Fisher Scientific common stock on 08/06/2026

Value of 08/07/2026 sale by Floral Park Associates Inc $2,700,817.75 Sale of 4,608 shares of Thermo Fisher Scientific common stock on 08/07/2026

Key Terms

Rule 144, Stock Option Exercise, attorney-in-fact

3 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.

Stock Option Exercise financial

"Common | 08/24/2026 | 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 attorney-in-fact for Marc N. Casper"

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 TMO disclose about upcoming sales?

It discloses that Marc N. Casper intends to sell 275 shares of Thermo Fisher Scientific common stock on 08/24/2026, in connection with a Stock Option Exercise, with Fidelity Brokerage Services LLC as the broker.

How many TMO shares has Marc N. Casper reported selling in recent transactions?

The notice lists several recent Thermo Fisher Scientific sales by Marc N. Casper, including 10,000-share transactions on 08/05/2026, 08/06/2026, 08/20/2026, and 08/21/2026, plus a 275-share sale on 08/07/2026.

What TMO sales were reported for Floral Park Associates Inc.?

Floral Park Associates Inc. reported Thermo Fisher Scientific common stock sales of 5,000 shares on 08/05/2026, 5,000 shares on 08/06/2026, and 4,608 shares on 08/07/2026, with corresponding dollar amounts listed for each sale.

What dollar values are associated with the recent TMO sales by Marc N. Casper?

Reported sale values include $5,752,296.00 on 08/05/2026, $5,744,685.00 on 08/06/2026, $161,178.33 for 275 shares on 08/07/2026, $6,292,653.00 on 08/20/2026, and $6,269,123.00 on 08/21/2026.

Who is executing the planned TMO share sale for Marc N. Casper?

The planned sale of 275 shares of Thermo Fisher Scientific common stock on 08/24/2026 is to be executed through Fidelity Brokerage Services LLC, which also provided the signature via an authorized representative acting as attorney-in-fact for Marc N. Casper.

What is the relationship between Marc N. Casper and Floral Park Associates Inc. in this TMO filing?

The remarks state that for sales reported from the Floral Park Associates Inc. account, Marc N. Casper is an authorized individual and account stakeholder, so those sales are reported together under the Rule 144 notice.

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

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Available on EDGAR 08/24/2026 - 04:30 PM Accepted by SEC EDGAR 08/24/2026 - 04:29 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	0001216055
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	CASPER MARC N
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
Relationship to Issuer	Director

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	275	172438.15	369747286	08/24/2026	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	08/24/2026	Stock Option Exercise	Issuer			275	08/24/2026	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
Marc N. Casper 168 Third Avenue Waltham MA 02451	Common	08/05/2026	10000	5752296.00
Floral Park Associates Inc 168 Third Avenue Waltham MA 02451	Common	08/05/2026	5000	2876145.43
Marc N. Casper 168 Third Avenue Waltham MA 02451	Common	08/06/2026	10000	5744685.00
Floral Park Associates Inc 168 Third Avenue Waltham MA 02451	Common	08/06/2026	5000	2872267.69
Marc N. Casper 168 Third Avenue Waltham MA 02451	Common	08/07/2026	275	161178.33
Floral Park Associates Inc 168 Third Avenue Waltham MA 02451	Common	08/07/2026	4608	2700817.75
Marc N. Casper 168 Third Avenue Waltham MA 02451	Common	08/20/2026	10000	6292653.00
Marc N. Casper 168 Third Avenue Waltham MA 02451	Common	08/21/2026	10000	6269123.00

144: Remarks and Signature

Remarks	In regards to sales in Securities Sold During the Past 3 Months from the Floral Park Associates Inc. account of Marc N. Casper is an authorized individual and account stakeholder.
Date of Notice	08/24/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	04/27/2026
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/ Jennifer Ruchti, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Marc N. Casper
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)