Ken Griffin Thermo Fisher Scientific Inc. Transaction History

Citadel Advisors LLC

$509 Billion
Q1 2025

A detailed history of Ken Griffin (Citadel Advisors LLC) transactions in Thermo Fisher Scientific Inc. stock. As of the latest transaction made, Citadel Advisors LLC holds 284,600 shares of TMO stock, worth $115 Million. This represents 0.03% of its overall portfolio holdings.

Number of Shares

284,600

Previous 264,000 7.8%

Holding current value

$115 Million

Previous $137 Million 3.11%

% of portfolio

0.03%

Previous 0.02%

31 transactions

Quarter	Operation	Price Per share	shares change	shares Held
Q1 2025 May 15, 2025	SELL	$497.6 - $606.74 $109 Million - $133 Million	-219,367 Reduced 64.53%	120,573 $60 Million
Q4 2024 Feb 14, 2025	BUY	$501.29 - $612.85 $87.1 Million - $106 Million	173,754 Added 104.55%	339,940 $177 Million
Q3 2024 Nov 14, 2024	SELL	$531.86 - $624.21 $434 Million - $510 Million	-816,508 Reduced 83.09%	166,186 $103 Million
Q2 2024 Aug 14, 2024	BUY	$541.52 - $599.02 $478 Million - $528 Million	882,024 Added 876.15%	982,694 $543 Million
Q1 2024 May 15, 2024	SELL	$528.82 - $599.43 $226 Million - $257 Million	-428,205 Reduced 80.97%	100,670 $58.5 Million
Q4 2023 Feb 14, 2024	BUY	$431.41 - $532.94 $122 Million - $150 Million	281,915 Added 114.15%	528,875 $281 Million
Q3 2023 Nov 14, 2023	BUY	$498.29 - $574.41 $60.4 Million - $69.6 Million	121,162 Added 96.31%	246,960 $125 Million
Q2 2023 Aug 14, 2023	SELL	$508.46 - $591.13 $56.9 Million - $66.2 Million	-111,917 Reduced 47.08%	125,798 $65.6 Million
Q1 2023 May 15, 2023	BUY	$535.0 - $604.82 $46 Million - $52.1 Million	86,060 Added 56.75%	237,715 $137 Million
Q4 2022 Feb 14, 2023	BUY	$484.71 - $571.37 $58.6 Million - $69.1 Million	120,973 Added 394.28%	151,655 $83.5 Million
Q3 2022 Nov 14, 2022	SELL	$507.19 - $604.49 $123 Million - $146 Million	-242,002 Reduced 88.75%	30,682 $15.6 Million
Q2 2022 Aug 15, 2022	BUY	$500.9 - $612.21 $121 Million - $148 Million	241,031 Added 761.48%	272,684 $148 Million
Q1 2022 May 16, 2022	BUY	$524.0 - $644.92 $4.39 Million - $5.4 Million	8,372 Added 35.96%	31,653 $18.7 Million
Q4 2021 Feb 14, 2022	SELL	$569.0 - $667.24 $97.2 Million - $114 Million	-170,824 Reduced 88.01%	23,281 $15.5 Million
Q3 2021 Nov 15, 2021	SELL	$509.53 - $609.78 $95.6 Million - $114 Million	-187,607 Reduced 49.15%	194,105 $111 Million
Q2 2021 Aug 16, 2021	BUY	$441.0 - $508.24 $68.4 Million - $78.8 Million	155,110 Added 68.45%	381,712 $193 Million
Q1 2021 May 17, 2021	BUY	$439.85 - $518.83 $54.8 Million - $64.6 Million	124,572 Added 122.09%	226,602 $103 Million
Q4 2020 Feb 16, 2021	BUY	$435.06 - $527.66 $33 Million - $40 Million	75,824 Added 289.34%	102,030 $47.5 Million
Q3 2020 Nov 16, 2020	SELL	$359.77 - $441.52 $4.41 Million - $5.41 Million	-12,260 Reduced 31.87%	26,206 $11.6 Million
Q2 2020 Aug 14, 2020	SELL	$275.2 - $362.34 $96.5 Million - $127 Million	-350,677 Reduced 90.12%	38,466 $13.9 Million
Q1 2020 May 15, 2020	BUY	$255.3 - $340.05 $97.6 Million - $130 Million	382,268 Added 5560.26%	389,143 $110 Million
Q4 2019 Feb 14, 2020	SELL	$271.93 - $328.04 $2.7 Million - $3.26 Million	-9,935 Reduced 59.1%	6,875 $2.23 Million
Q3 2019 Nov 14, 2019	SELL	$268.46 - $305.43 $24 Million - $27.3 Million	-89,441 Reduced 84.18%	16,810 $4.9 Million
Q2 2019 Aug 14, 2019	SELL	$257.51 - $295.55 $160 Million - $184 Million	-622,976 Reduced 85.43%	106,251 $31.2 Million
Q1 2019 May 15, 2019	BUY	$212.17 - $273.72 $107 Million - $138 Million	502,851 Added 222.13%	729,227 $0
Q4 2018 Feb 14, 2019	BUY	$208.47 - $251.98 $46.5 Million - $56.2 Million	222,975 Added 6556.16%	226,376 $50.7 Million
Q3 2018 Nov 13, 2018	BUY	$205.57 - $244.32 $498,096 - $591,987	2,423 Added 247.75%	3,401 $0
Q2 2018 Aug 10, 2018	SELL	$203.14 - $219.53 $104 Million - $113 Million	-513,660 Reduced 99.81%	978 $0
Q1 2018 May 11, 2018	BUY	$192.98 - $224.11 $51.2 Million - $59.5 Million	265,537 Added 106.6%	514,638 $106 Million
Q4 2017 Feb 09, 2018	SELL	$182.03 - $200.37 $108 Million - $119 Million	-595,354 Reduced 70.5%	249,101 $47.3 Million
Q3 2017 Nov 09, 2017	BUY	$171.74 - $194.04 $145 Million - $164 Million	844,455	844,455 $160 Million

Others Institutions Holding TMO

# of Institutions

2,910

Shares Held

339M

Call Options Held

1.91M

Put Options Held

2.16M

View Full List

About THERMO FISHER SCIENTIFIC INC.

Ticker TMO
Exchange NYSE
Sector Healthcare
Industry Diagnostics & Research
Shares Outstandng 391,788,992
Market Cap $158B
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...

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