Who holds TMO (THERMO FISHER SCIENTIFIC INC)?

TMO

THERMO FISHER SCIENTIFIC INC

Data as of 2026 Q1 (03-31) · 13F snapshot

Summary

THERMO FISHER SCIENTIFIC INC (TMO) is held by 18 tracked hedge-fund managers, a combined reported value of ~$3.31B; the largest are Chris Hohn, Andreas Halvorsen, Ken Griffin. This quarter: 1 new, 5 added, 1 trimmed, 1 closed. 20 members of Congress have disclosed STOCK Act trades. Data as of 2026 Q1, from public SEC 13F filings, delayed up to ~45 days.

Attention · HighThis quarter · Heating up

Gurus holding18

Congress trades20

Price$568.26vs quarter-end+15.61%

Sectors1

This quarter's moves

New1

Added5

Trimmed / sold2

Top holderChris Hohn

Chris HohnBig trim

Value $882.07M2.2% of portfolio1,517,6392024 Q1

Andreas HalvorsenBig add

Value $819.88M2.3% of portfolio1,668,0252026 Q1

Ken GriffinAdd

Value $424.92M0.3% of portfolio864,4892026 Q1

Stephen MandelTrim

Value $323.64M3.1% of portfolio587,6962022 Q4

Steven CohenTrim

Value $173.78M0.3% of portfolio353,5412026 Q1

Ken GriffinCALL—

Value $144.31M— of portfolio293,6002026 Q1

Ken GriffinPUT—

Value $97.13M— of portfolio197,6002026 Q1

Philippe LaffontNew

Value $78.04M1.0% of portfolio490,6052016 Q3

Izzy EnglanderPUT—

Value $65.52M— of portfolio133,3002026 Q1

David TepperTrim

Value $45.64M0.8% of portfolio187,0002018 Q3

Izzy EnglanderCALL—

Value $24.23M— of portfolio49,3002026 Q1

Seth Klarman—

Value $9.30M— of portfolio441,4952000 Q2

Steven CohenCALL—

Value $6.19M— of portfolio12,6002026 Q1

Steven CohenPUT—

Value $6.19M— of portfolio12,6002026 Q1

Greenwoods Asset ManagementHold

Value $2.53M0.1% of portfolio4,5792024 Q2

Investor	Period	Value	Shares	% of portfolio	Action
Chris Hohn	2024 Q1	$882.07M	1,517,639	2.2%	Big trim
Andreas Halvorsen	2026 Q1	$819.88M	1,668,025	2.3%	Big add
Ken Griffin	2026 Q1	$424.92M	864,489	0.3%	Add
Stephen Mandel	2022 Q4	$323.64M	587,696	3.1%	Trim
Steven Cohen	2026 Q1	$173.78M	353,541	0.3%	Trim
Ken GriffinCALL	2026 Q1	$144.31M	293,600	—	—
Ken GriffinPUT	2026 Q1	$97.13M	197,600	—	—
Philippe Laffont	2016 Q3	$78.04M	490,605	1.0%	New
Izzy EnglanderPUT	2026 Q1	$65.52M	133,300	—	—
David Tepper	2018 Q3	$45.64M	187,000	0.8%	Trim
Izzy EnglanderCALL	2026 Q1	$24.23M	49,300	—	—
Seth Klarman	2000 Q2	$9.30M	441,495	—	—
Steven CohenCALL	2026 Q1	$6.19M	12,600	—	—
Steven CohenPUT	2026 Q1	$6.19M	12,600	—	—
Greenwoods Asset Management	2024 Q2	$2.53M	4,579	0.1%	Hold

Insider Trading

Officers · directors · Form 4

Jennifer M Johnson
Director
Buy
61Traded 2026-06-27Filed 2026-06-30
Karen S Lynch
Director
Buy
61Traded 2026-06-27Filed 2026-06-30
Dion J Weisler
Director
Buy
73Traded 2026-06-27Filed 2026-06-30
Scott M Sperling
Director
Buy
83Traded 2026-06-27Filed 2026-06-30
Alexandra R. Keith
Director
Buy
61Traded 2026-06-27Filed 2026-06-30
Jennifer M Johnson
Director
Buy
499 @ $0.00Traded 2026-05-20Filed 2026-05-22
Alexandra R. Keith
Director
Buy
499 @ $0.00Traded 2026-05-20Filed 2026-05-22
Dion J Weisler
Director
Sell$36.3K
80 @ $451.79Traded 2026-05-20Filed 2026-05-22
Nelson Chai
Director
Buy
499 @ $0.00Traded 2026-05-20Filed 2026-05-22
Karen S Lynch
Director
Buy
499 @ $0.00Traded 2026-05-20Filed 2026-05-22
Ruby R Chandy
Director
Buy
499 @ $0.00Traded 2026-05-20Filed 2026-05-22
Scott M Sperling
Director
Buy
499 @ $0.00Traded 2026-05-20Filed 2026-05-22
Martin C Harris
Director
Buy
499 @ $0.00Traded 2026-05-20Filed 2026-05-22
Debora L Spar
Director
Buy
499 @ $0.00Traded 2026-05-20Filed 2026-05-22
Tyler Jacks
Director
Buy
499 @ $0.00Traded 2026-05-20Filed 2026-05-22
Dion J Weisler
Director
Buy
499 @ $0.00Traded 2026-05-20Filed 2026-05-22
Gianluca Pettiti
President & COO
Sell$185.1K
400 @ $462.66Traded 2026-04-27Filed 2026-04-29
Karen S Lynch
Director
Buy
66Traded 2026-03-28Filed 2026-03-31
Alexandra R. Keith
Director
Buy
66Traded 2026-03-28Filed 2026-03-31
Dion J Weisler
Director
Buy
79Traded 2026-03-28Filed 2026-03-31
Jennifer M Johnson
Director
Buy
66Traded 2026-03-28Filed 2026-03-31
Scott M Sperling
Director
Buy
90Traded 2026-03-28Filed 2026-03-31
Michael D Shafer
Executive Vice President
Sell$802.5K
1,607 @ $499.40Traded 2026-03-11Filed 2026-03-12
Marc N Casper
Chairman & CEO
Sell$210.7K
411 @ $512.73Traded 2026-03-05Filed 2026-03-09

Insider transactions are public SEC Form 4 disclosures (company officers, directors, 10% owners), for research only — not investment advice.

Data from public SEC 13F & STOCK Act filings, delayed up to ~45 days, partial holdings only — for research, not investment advice.