Ticker · CUSIP 883556102

TMO

THERMO FISHER SCIENTIFIC INC

Healthcare·Diagnostics & Research

···Share

Holders (tracked)

Combined shares

27,035,834

Combined value

$15.67B

Last close

$526.60

Quarter

2025Q4

Price is -9.1% vs the avg quarter-end implied price across tracked holders.

Price · 1Y$526.60+100.67 (+23.63%)H $638.82 · L $389.23 · Avg Vol 2.3M

Congress buyCongress sell

Tracked holders · last 8 quarters

+11 vs previous quarter over the last 8.

SEC event timeline

30 events

Daniel Loeb (Third Point) opened position2026-02-17
+50,000 shares · 2025Q4
Position
T. Rowe Price added2026-02-17
+1,230,872 shares · 2025Q4
Position
Wellington Management added2026-02-17
+768,780 shares · 2025Q4
Position
Longview Partners (Guernsey) trimmed2026-02-17
−53,290 shares · 2025Q4
Position
Paul Tudor Jones (Tudor Investment) opened position2026-02-17
+8,610 shares · 2025Q4
Position
Larry Robbins (Glenview Capital) trimmed2026-02-17
−58,994 shares · 2025Q4
Position
Ron Baron (Baron Capital / BAMCO) added2026-02-17
+4,108 shares · 2025Q4
Position
Jeremy Grantham (GMO) added2026-02-17
+270,200 shares · 2025Q4
Position
AQR Capital Management trimmed2026-02-17
−10,856 shares · 2025Q4
Position
Ken Griffin (Citadel Advisors) added2026-02-17
+340,704 shares · 2025Q4
Position
D.E. Shaw & Co. trimmed2026-02-17
−16,913 shares · 2025Q4
Position
Andreas Halvorsen (Viking Global) opened position2026-02-17
+793,187 shares · 2025Q4
Position
Two Sigma Investments trimmed2026-02-17
−228 shares · 2025Q4
Position
Izzy Englander (Millennium Mgmt) trimmed2026-02-17
−444,827 shares · 2025Q4
Position
Steve Cohen (Point72) added2026-02-17
+267,407 shares · 2025Q4
Position
Ray Dalio (Bridgewater Associates) opened position2026-02-13
+1,686 shares · 2025Q4
Position
Wally Weitz (Weitz Investment) trimmed2026-02-12
−15,500 shares · 2025Q4
Position
Norges Bank (Norway SWF) opened position2026-02-10
+5,302,863 shares · 2025Q4
Position
Ken Fisher (Fisher Asset Mgmt) added2026-02-09
+71,320 shares · 2025Q4
Position
Tom Gayner (Markel Group) added2026-02-06
+7,000 shares · 2025Q4
Position
Mario Gabelli (GAMCO) trimmed2026-02-05
−490 shares · 2025Q4
Position
Baillie Gifford & Co added2026-01-23
+279,635 shares · 2025Q4
Position
Paul Tudor Jones (Tudor Investment) exited2025-12-09
−85,253 shares · 2025Q3
Position
Izzy Englander (Millennium Mgmt) added2025-11-14
+186,092 shares · 2025Q3
Position
Steve Cohen (Point72) trimmed2025-11-14
−201,889 shares · 2025Q3
Position
Two Sigma Investments trimmed2025-11-14
−627,589 shares · 2025Q3
Position
D.E. Shaw & Co. trimmed2025-11-14
−1,261,516 shares · 2025Q3
Position
T. Rowe Price added2025-11-14
+911,822 shares · 2025Q3
Position
Wellington Management added2025-11-14
+1,270,191 shares · 2025Q3
Position
Stanley Druckenmiller (Duquesne) exited2025-11-14
−12,200 shares · 2025Q3
Position

Insider activity

No insider transactions in the last 30 days.

View full insider history for TMO →

Follow-the-investor returns

If you'd copied each holder of TMO…

Cost basis inferred from each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.

Investor	First in	Cost basis	Return	Position value today
Dodge & Cox	2016Q1	$146.13	+260.4%	$13.6M
Longview Partners (Guernsey)	2016Q1	$165.07	+219.0%	$447.8M
Mario Gabelli (GAMCO)	2016Q1	$299.96	+75.6%	$2.4M
Wally Weitz (Weitz Investment)	2016Q4	$340.43	+54.7%	$71.1M
Baillie Gifford & Co	2017Q4	$340.79	+54.5%	$405.9M
Larry Robbins (Glenview Capital)	2016Q1	$383.32	+37.4%	$117.9M
Wellington Management	2016Q1	$390.44	+34.9%	$1.83B
T. Rowe Price	2016Q1	$397.32	+32.5%	$4.06B
Ken Fisher (Fisher Asset Mgmt)	2016Q1	$422.54	+24.6%	$1.47B
Paul Tudor Jones (Tudor Investment)	2016Q2	$433.33	+21.5%	$3.5M
Paul Tudor Jones (Tudor Investment)	2016Q2	$433.33	+21.5%	$3.5M
Paul Tudor Jones (Tudor Investment)	2016Q2	$433.33	+21.5%	$3.5M
Bill Nygren (Harris / Oakmark)	2025Q3	$485.02	+8.6%	$285K
AQR Capital Management	2016Q1	$498.65	+5.6%	$76.2M
Ken Griffin (Citadel Advisors)	2016Q2	$506.76	+3.9%	$151.3M
Ken Griffin (Citadel Advisors)	2016Q2	$506.76	+3.9%	$151.3M
Ken Griffin (Citadel Advisors)	2016Q2	$506.76	+3.9%	$151.3M
Jeremy Grantham (GMO)	2017Q1	$506.95	+3.9%	$1.27B
Daniel Loeb (Third Point)	2024Q4	$520.23	+1.2%	$26.3M
Tom Gayner (Markel Group)	2022Q2	$532.51	-1.1%	$33.1M
Ron Baron (Baron Capital / BAMCO)	2019Q3	$534.59	-1.5%	$15.2M
Izzy Englander (Millennium Mgmt)	2016Q1	$536.54	-1.9%	$64.0M
Izzy Englander (Millennium Mgmt)	2016Q1	$536.54	-1.9%	$64.0M
Izzy Englander (Millennium Mgmt)	2016Q1	$536.54	-1.9%	$64.0M
Ray Dalio (Bridgewater Associates)	2016Q2	$542.79	-3.0%	$888K
D.E. Shaw & Co.	2016Q1	$565.54	-6.9%	$579K
D.E. Shaw & Co.	2016Q1	$565.54	-6.9%	$579K
D.E. Shaw & Co.	2016Q1	$565.54	-6.9%	$579K
Two Sigma Investments	2016Q2	$565.75	-6.9%	$1.1M
Two Sigma Investments	2016Q2	$565.75	-6.9%	$1.1M
Two Sigma Investments	2016Q2	$565.75	-6.9%	$1.1M
Andreas Halvorsen (Viking Global)	2017Q4	$573.51	-8.2%	$417.7M
Steve Cohen (Point72)	2016Q4	$577.20	-8.8%	$230.0M
Steve Cohen (Point72)	2016Q4	$577.20	-8.8%	$230.0M
Steve Cohen (Point72)	2016Q4	$577.20	-8.8%	$230.0M
Norges Bank (Norway SWF)	2016Q1	$92883.21	-99.4%	$2.79B

Who moved on this name in 2025Q4

Position changes reported for the latest quarter, grouped by direction.

New positions5

Norges Bank (Norway SWF)
+5,302,863
$3.07B
Andreas Halvorsen (Viking Global)
+793,187
$459.6M
Daniel Loeb (Third Point)
+50,000
$29.0M
Paul Tudor Jones (Tudor Investment)
+8,610
$5.0M
Ray Dalio (Bridgewater Associates)
+1,686
$977K

Added to9

Wellington Management
+768,780
$445.5M
Ken Griffin (Citadel Advisors)
+340,704
$197.4M
Baillie Gifford & Co
+279,635
$162.0M
Jeremy Grantham (GMO)
+270,200
$156.6M
Steve Cohen (Point72)
+267,407
$154.9M
Ken Fisher (Fisher Asset Mgmt)
+71,320
$41.3M
Tom Gayner (Markel Group)
+7,000
$4.1M
Ron Baron (Baron Capital / BAMCO)
+4,108
$2.4M
T. Rowe Price
+1,230,872
$713K

Trimmed8

Izzy Englander (Millennium Mgmt)
−444,827
$257.8M
Larry Robbins (Glenview Capital)
−58,994
$34.2M
Longview Partners (Guernsey)
−53,290
$30.9M
D.E. Shaw & Co.
−16,913
$9.8M
Wally Weitz (Weitz Investment)
−15,500
$9.0M
AQR Capital Management
−10,856
$6.3M
Mario Gabelli (GAMCO)
−490
$284K
Two Sigma Investments
−228
$132K

Exited0

—

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.

Quarter	Holders	Shares	Combined value	Δ holders
2022Q1	27	60,611,069	$3.05T	—
2022Q2	28	59,414,109	$2.97T	+1
2022Q3	27	55,963,739	$28.39B	-1
2022Q4	29	55,586,016	$30.61B	+2
2023Q1	27	56,128,317	$32.35B	-2
2023Q2	33	59,021,388	$30.79B	+6
2023Q3	31	54,514,018	$27.59B	-2
2023Q4	28	54,491,986	$28.92B	-3
2024Q1	28	55,513,629	$32.26B	—
2024Q2	30	56,808,240	$31.41B	+2
2024Q3	29	26,357,638	$16.30B	-1
2024Q4	31	25,762,271	$13.40B	+2
2025Q1	28	18,674,914	$9.29B	-3
2025Q2	31	24,254,431	$9.83B	+3
2025Q3	25	18,005,860	$8.73B	-6
2025Q4	36	27,035,834	$15.67B	+11

Congress members trading this stock

Date	Member	Type	Amount range	Filing
2025-10-31	Lisa McClain	Sell	$1K – $15K	PDF ↗
2025-10-30	Lisa McClain	Buy	$1K – $15K	PDF ↗
2025-10-30	Lisa McClain	Sell	$1K – $15K	PDF ↗
2025-09-23	Valerie Hoyle	Sell	$1K – $15K	PDF ↗
2025-08-19	Kelly Louise Morrison	Sell (P)	$1K – $15K	PDF ↗
2025-08-19	Kelly Louise Morrison	Sell (P)	$1K – $15K	PDF ↗
2025-07-25	Julia Letlow	Buy	$1K – $15K	PDF ↗
2025-07-22	Lisa McClain	Buy	$1K – $15K	PDF ↗
2025-06-10	Lisa McClain	Sell (P)	$1K – $15K	PDF ↗
2025-06-06	Valerie Hoyle	Buy	$1K – $15K	PDF ↗
2025-05-05	Thomas H. Kean	Buy	$1K – $15K	PDF ↗
2025-04-28	Julia Letlow	Sell	$1K – $15K	PDF ↗

Who owns TMO

36 super-investors · 2025Q4

Tracked stake

27.04M

Combined value

$15.67B

% of shares outstanding

—

shares-out unknown

Quarter action mix

New7Added13Trim14Held2

#	Manager	Shares	Value	% of book	Last action
1	T. Rowe Price	7.70M	$4.46B	0.5%	Added+1.23M
2	Norges Bank Norway SWF	5.30M	$3.07B	0.3%	New+5.30M
3	Wellington Management	3.47M	$2.01B	0.4%	Added+768.8K
4	Ken Fisher Fisher Asset Mgmt	2.79M	$1.62B	0.6%	Added+71.3K
5	Jeremy Grantham GMO	2.41M	$1.40B	3.6%	Added+270.2K
6	Longview Partners Guernsey	850.3K	$493M	5.1%	Trim−53.3K
7	Andreas Halvorsen Viking Global	793.2K	$460M	1.2%	New+793.2K
8	Baillie Gifford & Co	770.9K	$447M	0.4%	Added+279.6K
9	Ken Griffin Citadel Advisors	690.4K	$400M	0.1%	Added+340.7K
10	Steve Cohen Point72	436.9K	$253M	0.3%	Added+267.4K
11	Ken Griffin Citadel Advisors	351.7K	$204M	0.0%	Added+340.7K
12	Ken Griffin Citadel Advisors	287.4K	$167M	0.0%	Added+340.7K
13	Larry Robbins Glenview Capital	223.9K	$130M	2.6%	Trim−59.0K
14	AQR Capital Management	144.8K	$84M	0.0%	Trim−10.9K
15	Steve Cohen Point72	137.9K	$80M	0.1%	Added+267.4K
16	Wally Weitz Weitz Investment	134.9K	$78M	4.6%	Trim−15.5K
17	Izzy Englander Millennium Mgmt	121.5K	$70M	0.0%	Trim−444.8K
18	Izzy Englander Millennium Mgmt	80.6K	$47M	0.0%	Trim−444.8K
19	Tom Gayner Markel Group	62.8K	$36M	0.3%	Added+7.0K
20	Izzy Englander Millennium Mgmt	52.3K	$30M	0.0%	Trim−444.8K
21	Daniel Loeb Third Point	50.0K	$29M	0.4%	New+50.0K
22	D.E. Shaw & Co.	47.5K	$28M	0.0%	Trim−16.9K
23	Ron Baron Baron Capital / BAMCO	28.8K	$17M	0.0%	Added+4.1K
24	Dodge & Cox	25.7K	$15M	0.0%	Held
25	Steve Cohen Point72	16.0K	$9M	0.0%	Added+267.4K
26	Two Sigma Investments	9.3K	$5M	0.0%	Trim−228
27	Paul Tudor Jones Tudor Investment	9.0K	$5M	0.0%	New+8.6K
28	Paul Tudor Jones Tudor Investment	8.6K	$5M	0.0%	New+8.6K
29	Paul Tudor Jones Tudor Investment	6.6K	$4M	0.0%	New+8.6K
30	D.E. Shaw & Co.	6.6K	$4M	0.0%	Trim−16.9K
31	Mario Gabelli GAMCO	4.6K	$3M	0.0%	Trim−490
32	Two Sigma Investments	2.0K	$1M	0.0%	Trim−228
33	Ray Dalio Bridgewater Associates	1.7K	$977K	0.0%	New+1.7K
34	Two Sigma Investments	1.3K	$753K	0.0%	Trim−228
35	D.E. Shaw & Co.	1.1K	$637K	0.0%	Trim−16.9K
36	Bill Nygren Harris / Oakmark	541	$313K	0.0%	Held

Recent moves

20 transactions

ADDSteve Cohen (Point72)
+267,407 · 2025Q4
TRIMLarry Robbins (Glenview Capital)
−58,994 · 2025Q4
ADDKen Griffin (Citadel Advisors)
+340,704 · 2025Q4
TRIMAQR Capital Management
−10,856 · 2025Q4
NEWAndreas Halvorsen (Viking Global)
+793,187 · 2025Q4
ADDRon Baron (Baron Capital / BAMCO)
+4,108 · 2025Q4
TRIMTwo Sigma Investments
−228 · 2025Q4
TRIMIzzy Englander (Millennium Mgmt)
−444,827 · 2025Q4
NEWDaniel Loeb (Third Point)
+50,000 · 2025Q4
TRIMD.E. Shaw & Co.
−16,913 · 2025Q4
ADDT. Rowe Price
+1,230,872 · 2025Q4
ADDWellington Management
+768,780 · 2025Q4
ADDJeremy Grantham (GMO)
+270,200 · 2025Q4
TRIMLongview Partners (Guernsey)
−53,290 · 2025Q4
NEWPaul Tudor Jones (Tudor Investment)
+8,610 · 2025Q4
NEWRay Dalio (Bridgewater Associates)
+1,686 · 2025Q4
TRIMWally Weitz (Weitz Investment)
−15,500 · 2025Q4
NEWNorges Bank (Norway SWF)
+5,302,863 · 2025Q4
ADDKen Fisher (Fisher Asset Mgmt)
+71,320 · 2025Q4
ADDTom Gayner (Markel Group)
+7,000 · 2025Q4

Embed this chart

Paste this iframe anywhere to embed the live TMO chart.

<iframe src="https://openstocks.me/embed/stocks/TMO" width="100%" height="480" frameborder="0" loading="lazy" title="TMO chart by OpenStocks" style="border:0;border-radius:12px;background:transparent"></iframe>

Preview: https://openstocks.me/embed/stocks/TMO

Explore related topics