Thermo Fisher Scientific TMO Insider Ownership

NYSE TMO

$657.76 +6.03 (+0.93%)

At close: Oct 9, 2026 · 4:00 PM EDT

Insider Holdings by Owner

548.52K Shares

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

0.132%

▼-0.0036% pp QoQ

Shares Held by Insiders

491.32K

filed for Sep 2026

▼-2.65% QoQ

Shares Outstanding

371.00Mn

371,000,000 shares

Direct Holdings

462.34K

Indirect: 28.97K

Net Shares Traded (QoQ)

-13.38K

net selling in Sep 2026

Insiders Holding Shares

with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold

Latest quarter —

Net over range —

Buying quarters —

Insider Ownership Summary

Updated Oct 10, 2026

Over the past year, TMO insiders sold $158.13 million of stock (271.55K shares) on the open market and bought none.

Behind Thermo Fisher Scientific's open-market sales in the past 12 months were 7 insiders, and no insider bought.
Marc N. Casper (Chairman & CEO) was TMO's largest open-market seller in the past 12 months, with $53.89 million of sales (93.51K shares); the latest was on August 24, 2026.
The latest open-market trade in TMO stock by an insider was a sale of 4.13K shares for $2.54 million by Gianluca Pettiti (President & COO) on August 31, 2026.
Beyond open-market trades, insiders at Thermo Fisher Scientific received 35.01K shares in stock awards, acquired 311.17K shares through option exercises and conversions, gave up 14.35K shares to cover taxes or exercise prices and gave away 4.82K shares as gifts in the last 12 months.
Business Quant data shows Thermo Fisher Scientific insiders holding 491.31K shares in total in their latest Form 4 filings, down 2.65% from 504.69K shares at the end of Q2 2026 and up 12.99% from 434.82K shares at the end of Q3 2025.
Indirect holdings, through trusts, partnerships, family members and other entities, make up 5.90% (28.97K shares) of Thermo Fisher Scientific's insider total, with the other 94.10% (462.34K shares) held directly.
The insider holdings in Thermo Fisher Scientific belong to 22 insiders who have reported on Form 4 within the past two years.
TMO's largest insider holders by reported holdings are Marc N. Casper (Chairman & CEO, 138.97K shares), Michel Lagarde (Executive Vice President, 85.15K shares) and Scott M. Sperling (Director, 69.48K shares).
The largest insider, Marc N. Casper, holds 28.29% of TMO's insider total.
Institutions owned 94.70% of TMO shares as of Q2 2026; insiders' latest Form 4 filings account for about 0.13%, leaving roughly 5.17% with other investors, including the public.
In the last 12 months, 83 Form 4 filings with transactions in TMO stock came from 20 insiders.
Insider figures for TMO include Form 4 filings through September 29, 2026.

Form 4 Holdings

Insiders Holding TMO

Insiders 25

Shares held 548.52K

Of outstanding 0.148%

#	Insider	Position	Direct	Total	Share of Insiders	Last Filed
1	Marc N Casper	Chairman Ceo	122,669	122,669	22.4%	01 Sep, 2026
2	Michel Lagarde	Executive Vice President	85,151	85,151	15.5%	02 Mar, 2026
3	Scott M Sperling	Director	69,479	69,479	12.7%	22 May, 2026
4	Mark Stevenson	Retiring Executive Vp Coo	62,141	62,141	11.3%	01 Mar, 2022
5	Stephen Williamson	Retiring Sr. Vp And Cfo	32,499	32,499	5.9%	02 Mar, 2026
6	Gianluca Pettiti	President Coo	23,216	23,216	4.2%	01 Sep, 2026
7	Michael D Shafer	Executive Vice President	20,204	20,204	3.7%	01 Sep, 2026
8	Nelson Chai	Director	15,316	15,316	2.8%	22 May, 2026
9	Frederick M. Lowery	Executive Vice President	15,044	15,044	2.7%	02 Mar, 2026
10	Jim P Manzi	Director	14,807	14,807	2.7%	07 Feb, 2023
11	Lisa P. Britt	Sr. Vp And Chief Hr Officer	14,391	14,391	2.6%	01 Sep, 2026
12	Michael A Boxer	Svp And General Counsel	10,816	10,816	2.0%	11 Mar, 2025
13	C Martin Harris	Director	9,532	9,532	1.7%	22 May, 2026
14	Tyler Jacks	Director	9,462	9,462	1.7%	22 May, 2026
15	Lars Rebien Sorensen	Director	9,233	9,233	1.7%	23 May, 2024
16	Thomas B Jr. Shropshire	Svp And General Counsel	6,009	6,009	1.1%	01 Sep, 2026
17	James Meyer	Sr. Vice President Cfo	5,560	5,560	1.0%	01 Sep, 2026
18	Dion J Weisler	Director	5,446	5,446	1.0%	22 May, 2026
19	Ruby R Chandy	Director	3,463	3,463	0.6%	22 May, 2026
20	James C Mullen	Director	3,393	3,393	0.6%	22 May, 2025
21	Joseph R. Holmes	Vp Chief Accounting Officer	2,916	2,916	0.5%	01 Sep, 2026
22	Debora L Spar	Director	2,610	2,610	0.5%	22 May, 2026
23	R. Alexandra Keith	Director	2,602	2,602	0.5%	22 May, 2026
24	Jennifer M Johnson	Director	1,403	1,403	0.3%	22 May, 2026
25	Karen S Lynch	Director	1,159	1,159	0.2%	22 May, 2026

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

5,386 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
26 Sep, 2026	R. Alexandra Keith	Director	Acquired A	46	—	—	1,378	Direct
26 Sep, 2026	Karen S Lynch	Director	Acquired A	46	—	—	399	Direct
26 Sep, 2026	Jennifer M Johnson	Director	Acquired A	46	—	—	769	Direct
26 Sep, 2026	Scott M Sperling	Director	Acquired A	63	—	—	17,738	Direct
26 Sep, 2026	Dion J Weisler	Director	Acquired A	56	—	—	2,847	Direct
28 Aug, 2026	Marc N Casper	Chairman Ceo	Disposed F	725	$622.18	$450.93K	123,201	Direct
28 Aug, 2026	Joseph R. Holmes	Vp Chief Accounting Officer	Disposed F	11	$622.18	$6.57K	2,956	Direct
28 Aug, 2026	Thomas B Jr. Shropshire	Svp And General Counsel	Disposed F	49	$622.18	$30.50K	6,009	Direct
28 Aug, 2026	Gianluca Pettiti	President Coo	Disposed F	212	$622.18	$132.06K	24,439	Direct
28 Aug, 2026	Michael D Shafer	Executive Vice President	Disposed F	162	$622.18	$101.08K	20,832	Direct
28 Aug, 2026	James Meyer	Sr. Vice President Cfo	Disposed F	37	$622.18	$23.16K	5,793	Direct
28 Aug, 2026	Lisa P. Britt	Sr. Vp And Chief Hr Officer	Disposed F	87	$622.18	$54.15K	14,697	Direct
28 Aug, 2026	Gianluca Pettiti	President Coo	Disposed F	304	$622.18	$188.92K	24,135	Direct
28 Aug, 2026	James Meyer	Sr. Vice President Cfo	Disposed F	44	$622.18	$27.68K	5,748	Direct
28 Aug, 2026	Michael D Shafer	Executive Vice President	Disposed F	211	$622.18	$131.16K	20,621	Direct
28 Aug, 2026	Marc N Casper	Chairman Ceo	Disposed F	532	$622.18	$330.91K	122,669	Direct
28 Aug, 2026	Joseph R. Holmes	Vp Chief Accounting Officer	Disposed F	13	$622.18	$8.04K	2,943	Direct
28 Aug, 2026	Lisa P. Britt	Sr. Vp And Chief Hr Officer	Disposed F	116	$622.18	$72.20K	14,581	Direct
28 Aug, 2026	Gianluca Pettiti	President Coo	Disposed F	249	$622.18	$154.92K	23,886	Direct
28 Aug, 2026	Michael D Shafer	Executive Vice President	Disposed F	190	$622.18	$117.92K	20,431	Direct

Showing 1 to 20 of 5,386 transactions