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Thermo Fisher CEO uses stock at $622 for taxes

THERMO FISHER SCIENTIFIC INC.

(Very High)
(Neutral)
Form Type
4

Rhea-AI Filing Summary

THERMO FISHER SCIENTIFIC INC. (TMO) reported that Chairman & CEO Marc N. Casper had 1,256.617 shares of common stock withheld or delivered on 2026-08-28 to satisfy exercise price or tax liability, in two code F transactions at $622.18 per share. The filing also lists indirect holdings of 11,300 shares by the Alison Casper 2020 Irrevocable Trust and 5,000 shares by the MNC 2020 Irrevocable Trust, for which Casper disclaims beneficial ownership except for any pecuniary interest. The Rule 10b5-1 trading-plan checkbox was not selected.

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Insider CASPER MARC N
Role Chairman & CEO
Type Security Shares Price Value
Exercise Price or Tax Liability Common Stock 724.766 $622.18 $451K
Exercise Price or Tax Liability Common Stock 531.851 $622.18 $331K
holding Common Stock F1 -- -- --
holding Common Stock F1 -- -- --
Holdings After Transaction: Common Stock — 122,668.741 shares (Direct); Common Stock — 11,300 shares (Indirect, By Alison Casper 2020 Irrevocable Trust); Common Stock — 5,000 shares (Indirect, By MNC 2020 Irrevocable Trust)
Footnotes (1)
  1. F1. The reporting person disclaims beneficial ownership of the securities reported herein as indirectly beneficially owned, except to the extent of any pecuniary interest therein.
Shares delivered or withheld for exercise price or tax liability 1,256.617 shares Total code F common stock dispositions on 2026-08-28
Code F transaction 1 share amount 724.766 shares Common stock used for payment of exercise price or tax liability on 2026-08-28
Code F transaction 2 share amount 531.851 shares Common stock used for payment of exercise price or tax liability on 2026-08-28
Per-share price in code F transactions $622.18 per share Price reported for both non-derivative common stock transactions on 2026-08-28
Indirect holdings by Alison Casper 2020 Irrevocable Trust 11,300 shares Common stock indirectly reported with beneficial ownership disclaimed except for pecuniary interest
Indirect holdings by MNC 2020 Irrevocable Trust 5,000 shares Common stock indirectly reported with beneficial ownership disclaimed except for pecuniary interest
Payment of exercise price or tax liability financial
"transaction_code_description: "Payment of exercise price or tax liability by deliv""
beneficial ownership financial
"The reporting person disclaims beneficial ownership of the securities"
Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.
pecuniary interest financial
"except to the extent of any pecuniary interest therein"
irrevocable trust financial
"By Alison Casper 2020 Irrevocable Trust"
An irrevocable trust is a legal arrangement where an owner transfers assets into a separate entity managed by a trustee and gives up the power to modify or reclaim those assets. For investors it matters because putting stock or other holdings into such a trust can change who controls and benefits from the assets, affect taxes and creditor protection, and influence how easy it is to sell or value those holdings—like placing valuables in a locked safe overseen by someone else.
Rule 10b5-1 regulatory
"aff_10b5_one is the filing's document-level Rule 10b5-1 checkbox"
Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.

FAQ

What did TMO Chairman & CEO Marc N. Casper report in this Form 4?

Marc N. Casper reported that 1,256.617 shares of Thermo Fisher Scientific common stock were withheld or delivered on 2026-08-28 to pay exercise price or tax liability, in two non-open-market code F transactions at $622.18 per share.

How many TMO shares were involved in Marc N. Casper's tax or exercise-price transactions?

The filing shows a total of 1,256.617 shares of Thermo Fisher Scientific common stock used for payment of exercise price or tax liability, consisting of 724.766 shares and 531.851 shares, both on 2026-08-28.

What price per share is reported for Marc N. Casper's Form 4 transactions in TMO?

Both code F transactions report a price of $622.18 per share for Thermo Fisher Scientific common stock, used in connection with the payment of exercise price or tax liability on 2026-08-28.

Does the Form 4 indicate Marc N. Casper traded TMO under a Rule 10b5-1 plan?

No. The document-level Rule 10b5-1 checkbox is shown as false, indicating the box for affirming that the reported transactions were made under a Rule 10b5-1 trading arrangement was not selected.

How does Marc N. Casper describe his beneficial ownership of the trust-held TMO shares?

A footnote states that the reporting person disclaims beneficial ownership of securities reported as indirectly owned, except to the extent of any pecuniary interest in those shares held by the irrevocable trusts.

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

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Learn about SEC filing dates
SEC Form 4
FORM 4UNITED 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*
CASPER MARC N

(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)
XDirector10% Owner
XOfficer (give title below)Other (specify below)
Chairman & CEO
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
08/28/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock08/28/2026F724.766D$622.18123,200.592D
Common Stock08/28/2026F531.851D$622.18122,668.741D
Common Stock11,300IBy Alison Casper 2020 Irrevocable Trust(1)
Common Stock5,000IBy MNC 2020 Irrevocable Trust(1)
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
1. The reporting person disclaims beneficial ownership of the securities reported herein as indirectly beneficially owned, except to the extent of any pecuniary interest therein.
Remarks:
/s/ Melodie T. Morin, Attorney-in-Fact for Marc N. Casper09/01/2026
** Signature of Reporting PersonDate
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)