David A. Siegel Thermo Fisher Scientific Inc. Transaction History

Two Sigma Advisers, LP

$46.1 Billion
Q2 2025

A detailed history of David A. Siegel (Two Sigma Advisers, LP) transactions in Thermo Fisher Scientific Inc. stock. As of the latest transaction made, Two Sigma Advisers, LP holds 392,700 shares of TMO stock, worth $211 Million. This represents 0.35% of its overall portfolio holdings.

Number of Shares

392,700

Previous 529,200 25.79%

Holding current value

$211 Million

Previous $263 Million 39.53%

% of portfolio

0.35%

Previous 0.62%

27 transactions

Quarter	Operation	Price Per share	shares change	shares Held
Q2 2025 Aug 14, 2025	SELL	$390.26 - $489.06 $53.3 Million - $66.8 Million	-136,500 Reduced 25.79%	392,700 $159 Million
Q1 2025 May 15, 2025	SELL	$497.6 - $606.74 $201 Million - $245 Million	-404,000 Reduced 43.29%	529,200 $263 Million
Q4 2024 Feb 14, 2025	BUY	$501.29 - $612.85 $210 Million - $257 Million	419,200 Added 81.56%	933,200 $485 Million
Q3 2024 Nov 14, 2024	BUY	$531.86 - $624.21 $72 Million - $84.5 Million	135,300 Added 35.73%	514,000 $318 Million
Q2 2024 Aug 14, 2024	BUY	$541.52 - $599.02 $183 Million - $202 Million	337,100 Added 810.34%	378,700 $209 Million
Q1 2024 May 15, 2024	BUY	$528.82 - $599.43 $14.3 Million - $16.2 Million	27,100 Added 186.9%	41,600 $24.2 Million
Q4 2023 Feb 14, 2024	BUY	$431.41 - $532.94 $3.8 Million - $4.69 Million	8,800 Added 154.39%	14,500 $7.7 Million
Q3 2023 Nov 14, 2023	SELL	$498.29 - $574.41 $49.1 Million - $56.6 Million	-98,600 Reduced 94.53%	5,700 $2.89 Million
Q2 2023 Aug 14, 2023	BUY	$508.46 - $591.13 $18.4 Million - $21.4 Million	36,200 Added 53.16%	104,300 $54.4 Million
Q1 2023 May 15, 2023	BUY	$535.0 - $604.82 $36.4 Million - $41.2 Million	68,100 New	68,100 $39.3 Million
Q2 2022 Aug 15, 2022	SELL	$500.9 - $612.21 $9.02 Million - $11 Million	-18,000 Reduced 68.97%	8,100 $4.4 Million
Q1 2022 May 16, 2022	SELL	$524.0 - $644.92 $215 Million - $264 Million	-409,400 Reduced 94.01%	26,100 $15.4 Million
Q4 2021 Feb 14, 2022	BUY	$569.0 - $667.24 $244 Million - $287 Million	429,600 Added 7281.36%	435,500 $291 Million
Q3 2021 Nov 15, 2021	BUY	$509.53 - $609.78 $2.39 Million - $2.87 Million	4,700 Added 391.67%	5,900 $3.37 Million
Q2 2021 Aug 16, 2021	BUY	$441.0 - $508.24 $529,200 - $609,888	1,200 New	1,200 $605,000
Q4 2020 Feb 16, 2021	SELL	$435.06 - $527.66 $304,542 - $369,362	-700 Closed	0 $0
Q3 2020 Nov 16, 2020	BUY	$359.77 - $441.52 $251,839 - $309,064	700 New	700 $309,000
Q2 2020 Aug 14, 2020	SELL	$275.2 - $362.34 $22.1 Million - $29.1 Million	-80,300 Closed	0 $0
Q1 2020 May 15, 2020	BUY	$255.3 - $340.05 $20.5 Million - $27.3 Million	80,300 New	80,300 $22.8 Million
Q2 2019 Aug 14, 2019	SELL	$257.51 - $295.55 $876,306 - $1.01 Million	-3,403 Closed	0 $0
Q1 2019 May 15, 2019	SELL	$212.17 - $273.72 $5.56 Million - $7.17 Million	-26,200 Reduced 88.5%	3,403 $931,000
Q4 2018 Feb 14, 2019	BUY	$208.47 - $251.98 $6.17 Million - $7.46 Million	29,603 New	29,603 $6.63 Million
Q3 2018 Nov 14, 2018	SELL	$205.57 - $244.32 $641,583 - $762,522	-3,121 Closed	0 $0
Q2 2018 Aug 14, 2018	SELL	$203.14 - $219.53 $1.6 Million - $1.73 Million	-7,900 Reduced 71.68%	3,121 $646,000
Q1 2018 May 15, 2018	SELL	$192.98 - $224.11 $2.91 Million - $3.38 Million	-15,100 Reduced 57.81%	11,021 $2.28 Million
Q4 2017 Feb 14, 2018	SELL	$182.03 - $200.37 $20.2 Million - $22.3 Million	-111,200 Reduced 80.98%	26,121 $4.96 Million
Q3 2017 Nov 14, 2017	BUY	$171.74 - $194.04 $23.6 Million - $26.6 Million	137,321	137,321 $26 Million

Others Institutions Holding TMO

# of Institutions

2,883

Shares Held

346M

Call Options Held

3.67M

Put Options Held

3.42M

View Full List

About THERMO FISHER SCIENTIFIC INC.

Ticker TMO
Exchange NYSE
Sector Healthcare
Industry Diagnostics & Research
Shares Outstandng 391,788,992
Market Cap $210B
Description
Thermo Fisher Scientific Inc. offers life sciences solutions, analytical instruments, specialty diagnostics, and laboratory products and service worldwide. The company's Life Sciences Solutions segment offers reagents, instruments, and consumables for biological and medical research, discovery, and production of drugs and vaccines, as well as di...

More about TMO

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