DION J. WEISLER - 31 Dec 2025 Form 4 Insider Report for THERMO FISHER SCIENTIFIC INC. (TMO)

Role
Director
Signature
/s/ Melodie T. Morin, Attorney-in-Fact for Dion J. Weisler
Issuer symbol
TMO
Transactions as of
31 Dec 2025
Net transactions value
$0
Form type
4
Filing time
05 Jan 2026, 17:06:48 UTC
Previous filing
30 Sep 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
WEISLER DION J Director 168 THIRD AVENUE, WALTHAM /s/ Melodie T. Morin, Attorney-in-Fact for Dion J. Weisler 05 Jan 2026 0001580693

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction TMO Phantom Stock Units Award +65 +2.5% 2,639 31 Dec 2025 Common Stock 65 Direct F1, F2
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Convertible into Common Stock on a 1-for-1 basis.
F2 Represents stock units credited to the Reporting Person's account as of December 31, 2025, at a price of $579.45 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:

Exhibit List: Exhibit 24 - Power of Attorney