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  4. [Form 4] THERMO FISHER SCIENTIFIC INC. Insider Trading Activity

Thermo Fisher (TMO) CEO Marc N. Casper exercises options and sells 4,883 shares

Filing Impact
(Very High)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

THERMO FISHER SCIENTIFIC INC. Chairman & CEO Marc N. Casper reported exercising options for 275 shares of common stock at an exercise price of $309.63 per share, leaving 20,275 option shares outstanding. On the same date, entities associated with him sold 4,883 common shares, through multiple open-market transactions at weighted average prices generally between $577.37 and $593.36 per share, including sales by Floral Park Associates, Inc. The trades were effected under a Rule 10b5-1 trading plan adopted on April 27, 2026. Indirect holdings include 5,000 shares held by MNC 2020 Irrevocable Trust and 11,300 shares held by Alison Casper 2020 Irrevocable Trust, for which Casper disclaims beneficial ownership except to any pecuniary interest.

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Insider CASPER MARC N
Role Chairman & CEO
Sold 4,883 shs ($2.86M)
Approx. gross sale proceeds $2.86M
Approx. exercise cost $85K
Type Security Shares Price Value
Exercise Stock Option (Right to Buy) F15 275 $0.00 $0.00
Exercise Common Stock 275 $309.63 $85K
Sale Common Stock F1 6 $577.37 $3K
Sale Common Stock F1 4 $579.26 $2K
Sale Common Stock F1 2 $579.27 $1K
Sale Common Stock F1 4 $580.71 $2K
Sale Common Stock F1 3 $580.72 $2K
Sale Common Stock F1 5 $581.85 $3K
Sale Common Stock F1 2 $581.86 $1K
Sale Common Stock F1, F2 18 $583.37 $11K
Sale Common Stock F1, F3 63 $584.40 $37K
Sale Common Stock F1, F4 30 $585.42 $18K
Sale Common Stock F1, F5 58 $586.53 $34K
Sale Common Stock F1, F6 12 $587.64 $7K
Sale Common Stock F1, F7 32 $589.51 $19K
Sale Common Stock F1, F8 29 $590.77 $17K
Sale Common Stock F1, F9 7 $593.32 $4K
Sale Common Stock F1 94 $577.37 $54K
Sale Common Stock F1, F10 114 $579.26 $66K
Sale Common Stock F1, F11 113 $580.71 $66K
Sale Common Stock F1, F12 113 $581.85 $66K
Sale Common Stock F1, F13 302 $583.35 $176K
Sale Common Stock F1, F3 1,035 $584.41 $605K
Sale Common Stock F1, F4 530 $585.44 $310K
Sale Common Stock F1, F5 945 $586.52 $554K
Sale Common Stock F1, F6 228 $587.64 $134K
Sale Common Stock F1, F7 522 $589.52 $308K
Sale Common Stock F1, F8 495 $590.78 $292K
Sale Common Stock F1, F9 117 $593.31 $69K
holding Common Stock F14 -- -- --
holding Common Stock F14 -- -- --
Holdings After Transaction: Stock Option (Right to Buy) — 20,275 shares (Direct); Common Stock — 123,925.358 shares (Direct); Common Stock — 0 shares (Indirect, By Floral Park Associates, Inc.); Common Stock — 5,000 shares (Indirect, By MNC 2020 Irrevocable Trust); Common Stock — 11,300 shares (Indirect, By Alison Casper 2020 Irrevocable Trust)
Footnotes (15)
  1. F1. The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on April 27, 2026.
  2. F2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $583.01 to $584.00, inclusive. The reporting person undertakes to provide to Thermo Fisher Scientific Inc. ("TMO"), any security holder of TMO or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2), (3), (4), (5), (6), (7), (8), (9), (10), (11), (12) and (13) to this Form 4.
  3. F3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $584.01 to $584.93, inclusive.
  4. F4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $585.05 to $586.04, inclusive.
  5. F5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $586.05 to $586.88, inclusive.
  6. F6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $587.37 to $587.91, inclusive.
  7. F7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $589.21 to $590.06, inclusive.
  8. F8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $590.40 to $590.98, inclusive.
  9. F9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $593.22 to $593.36, inclusive.
  10. F10. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $579.26 to $579.27, inclusive.
  11. F11. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $580.71 to $580.72, inclusive.
  12. F12. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $581.85 to $581.86, inclusive.
  13. F13. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $583.01 to $584.00, inclusive.
  14. F14. The reporting person disclaims beneficial ownership of the securities reported herein as indirectly beneficially owned, except to the extent of any pecuniary interest therein.
  15. F15. The option vested in four equal installments on February 25, 2021, 2022, 2023, and 2024.
Options Exercised 275 shares Stock options exercised into common stock on 2026-08-07 at $309.63 per share
Shares Sold 4,883 shares Total common shares sold across reported open-market transactions
Sale Price Range $583.01 to $593.36 per share Weighted average price ranges from multiple sale footnotes
Option Exercise Price $309.63 per share Exercise price of stock option converting into 275 common shares
Options Remaining 20,275 shares Total option shares reported following the derivative exercise
MNC 2020 Trust Holding 5,000 shares Indirect common stock holding by MNC 2020 Irrevocable Trust
Alison Casper 2020 Trust Holding 11,300 shares Indirect common stock holding by Alison Casper 2020 Irrevocable Trust
Rule 10b5-1 trading plan regulatory
"transactions were effected pursuant to a Rule 10b5-1 trading plan"
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.
weighted average price financial
"The price reported in Column 4 is a weighted average price."
Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.
Stock Option (Right to Buy) financial
"security_title": "Stock Option (Right to Buy)""
indirectly beneficially owned financial
"securities reported herein as indirectly beneficially owned"

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FAQ

What did Thermo Fisher (TMO) CEO Marc N. Casper report in this Form 4?
Marc N. Casper reported exercising options for 275 shares at an exercise price of $309.63 and selling 4,883 common shares in multiple open-market transactions, along with updated indirect trust holdings disclosures.

How many Thermo Fisher (TMO) shares did Marc N. Casper sell and at what prices?
Entities associated with Marc N. Casper sold 4,883 common shares of TMO. The reported weighted average sale prices per share were generally between $577.37 and $593.36, across numerous open-market transactions on August 7, 2026.

Were Marc N. Casper’s Thermo Fisher (TMO) trades under a Rule 10b5-1 plan?
Yes. The filing states the transactions were effected under a Rule 10b5-1 trading plan adopted by Marc N. Casper on April 27, 2026, indicating the trades followed a pre-arranged trading schedule.

What Thermo Fisher (TMO) stock options does Marc N. Casper retain after this filing?
After exercising options for 275 shares, Marc N. Casper is reported as holding 20,275 option shares of Thermo Fisher common stock. The exercised option had a $309.63 per-share exercise price and expires on February 25, 2027.

Which entity executed some Thermo Fisher (TMO) share sales for Marc N. Casper?
Several sale transactions were reported as held indirectly through Floral Park Associates, Inc.. These involved open-market sales of Thermo Fisher common stock at weighted average prices generally in the high $570s to low $590s per share.
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).
X
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)
08/07/2026		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 Stock08/07/2026M275A$309.63124,200.358D
Common Stock08/07/2026S(1)6D$577.37124,194.358D
Common Stock08/07/2026S(1)4D$579.26124,190.358D
Common Stock08/07/2026S(1)2D$579.27124,188.358D
Common Stock08/07/2026S(1)4D$580.71124,184.358D
Common Stock08/07/2026S(1)3D$580.72124,181.358D
Common Stock08/07/2026S(1)5D$581.85124,176.358D
Common Stock08/07/2026S(1)2D$581.86124,174.358D
Common Stock08/07/2026S(1)18D$583.37(2)124,156.358D
Common Stock08/07/2026S(1)63D$584.4(3)124,093.358D
Common Stock08/07/2026S(1)30D$585.42(4)124,063.358D
Common Stock08/07/2026S(1)58D$586.53(5)124,005.358D
Common Stock08/07/2026S(1)12D$587.64(6)123,993.358D
Common Stock08/07/2026S(1)32D$589.51(7)123,961.358D
Common Stock08/07/2026S(1)29D$590.77(8)123,932.358D
Common Stock08/07/2026S(1)7D$593.32(9)123,925.358D
Common Stock08/07/2026S(1)94D$577.374,514IBy Floral Park Associates, Inc.
Common Stock08/07/2026S(1)114D$579.26(10)4,400IBy Floral Park Associates, Inc.
Common Stock08/07/2026S(1)113D$580.71(11)4,287IBy Floral Park Associates, Inc.
Common Stock08/07/2026S(1)113D$581.85(12)4,174IBy Floral Park Associates, Inc.
Common Stock08/07/2026S(1)302D$583.35(13)3,872IBy Floral Park Associates, Inc.
Common Stock08/07/2026S(1)1,035D$584.41(3)2,837IBy Floral Park Associates, Inc.
Common Stock08/07/2026S(1)530D$585.44(4)2,307IBy Floral Park Associates, Inc.
Common Stock08/07/2026S(1)945D$586.52(5)1,362IBy Floral Park Associates, Inc.
Common Stock08/07/2026S(1)228D$587.64(6)1,134IBy Floral Park Associates, Inc.
Common Stock08/07/2026S(1)522D$589.52(7)612IBy Floral Park Associates, Inc.
Common Stock08/07/2026S(1)495D$590.78(8)117IBy Floral Park Associates, Inc.
Common Stock08/07/2026S(1)117D$593.31(9)0IBy Floral Park Associates, Inc.
Common Stock5,000IBy MNC 2020 Irrevocable Trust(14)
Common Stock11,300IBy Alison Casper 2020 Irrevocable Trust(14)
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
Stock Option (Right to Buy)$309.6308/07/2026M275 (15)02/25/2027Common Stock275$020,275D
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 April 27, 2026.
2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $583.01 to $584.00, inclusive. The reporting person undertakes to provide to Thermo Fisher Scientific Inc. ("TMO"), any security holder of TMO or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2), (3), (4), (5), (6), (7), (8), (9), (10), (11), (12) and (13) to this Form 4.
3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $584.01 to $584.93, inclusive.
4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $585.05 to $586.04, inclusive.
5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $586.05 to $586.88, inclusive.
6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $587.37 to $587.91, inclusive.
7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $589.21 to $590.06, inclusive.
8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $590.40 to $590.98, inclusive.
9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $593.22 to $593.36, inclusive.
10. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $579.26 to $579.27, inclusive.
11. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $580.71 to $580.72, inclusive.
12. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $581.85 to $581.86, inclusive.
13. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $583.01 to $584.00, inclusive.
14. The reporting person disclaims beneficial ownership of the securities reported herein as indirectly beneficially owned, except to the extent of any pecuniary interest therein.
15. The option vested in four equal installments on February 25, 2021, 2022, 2023, and 2024.
Remarks:
/s/ Melodie T. Morin, Attorney-in-Fact for Marc N. Casper08/10/2026
** 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)

Source: View Original Filing on SEC EDGAR