Ken Griffin Icon PLC Transaction History

Citadel Advisors LLC

$618 Billion
Q3 2025

A detailed history of Ken Griffin (Citadel Advisors LLC) transactions in Icon PLC stock. As of the latest transaction made, Citadel Advisors LLC holds 269,979 shares of ICLR stock, worth $43.8 Million. This represents 0.01% of its overall portfolio holdings.

Number of Shares

269,979

Previous 1,946,142 86.13%

Holding current value

$43.8 Million

Previous $283 Million 83.31%

% of portfolio

0.01%

Previous 0.05%

31 transactions

Quarter	Operation	Price Per share	shares change	shares Held
Q3 2025 Nov 14, 2025	SELL	$139.63 - $195.01 $234 Million - $327 Million	-1,676,163 Reduced 86.13%	269,979 $47.2 Million
Q2 2025 Aug 14, 2025	BUY	$126.62 - $168.7 $157 Million - $209 Million	1,240,822 Added 175.92%	1,946,142 $283 Million
Q1 2025 May 15, 2025	BUY	$174.99 - $222.58 $23.4 Million - $29.8 Million	133,715 Added 23.39%	705,320 $123 Million
Q4 2024 Feb 14, 2025	SELL	$187.22 - $297.57 $1.58 Million - $2.51 Million	-8,444 Reduced 1.46%	571,605 $120 Million
Q3 2024 Nov 14, 2024	SELL	$280.48 - $346.2 $219 Million - $270 Million	-780,158 Reduced 57.36%	580,049 $167 Million

Q2 2024 Aug 14, 2024	BUY	$288.23 - $331.73 $137 Million - $157 Million	474,000 Added 53.49%	1,360,207 $426 Million
Q1 2024 May 15, 2024	BUY	$247.84 - $340.0 $6.08 Million - $8.34 Million	24,528 Added 2.85%	886,207 $298 Million
Q4 2023 Feb 14, 2024	SELL	$222.83 - $285.76 $139 Million - $179 Million	-625,886 Reduced 42.07%	861,679 $244 Million
Q3 2023 Nov 14, 2023	BUY	$236.44 - $265.62 $326 Million - $366 Million	1,376,919 Added 1244.44%	1,487,565 $366 Million
Q2 2023 Aug 14, 2023	BUY	$183.12 - $250.2 $18.7 Million - $25.6 Million	102,163 Added 1204.33%	110,646 $27.7 Million
Q1 2023 May 15, 2023	SELL	$193.59 - $245.33 $3.89 Million - $4.93 Million	-20,090 Reduced 70.31%	8,483 $1.81 Million
Q4 2022 Feb 14, 2023	BUY	$173.9 - $224.8 $315,976 - $408,461	1,817 Added 6.79%	28,573 $5.55 Million
Q3 2022 Nov 14, 2022	BUY	$183.25 - $247.5 $4.9 Million - $6.62 Million	26,756 New	26,756 $4.92 Million
Q1 2022 May 16, 2022	BUY	$216.09 - $296.03 $67.8 Million - $92.9 Million	313,693 Added 2192.43%	328,001 $79.8 Million
Q4 2021 Feb 14, 2022	BUY	$258.11 - $309.7 $3.16 Million - $3.8 Million	12,258 Added 597.95%	14,308 $4.43 Million
Q3 2021 Nov 15, 2021	SELL	$208.53 - $283.04 $172 Million - $233 Million	-822,789 Reduced 99.75%	2,050 $537,000
Q2 2021 Aug 16, 2021	BUY	$194.07 - $232.2 $141 Million - $169 Million	728,325 Added 754.63%	824,839 $171 Million
Q1 2021 May 17, 2021	BUY	$171.87 - $220.96 $3.86 Million - $4.96 Million	22,441 Added 30.3%	96,514 $19 Million
Q4 2020 Feb 16, 2021	BUY	$180.3 - $214.08 $11.9 Million - $14.2 Million	66,235 Added 845.05%	74,073 $14.4 Million
Q3 2020 Nov 16, 2020	SELL	$166.91 - $196.1 $16 Million - $18.8 Million	-96,017 Reduced 92.45%	7,838 $1.5 Million
Q2 2020 Aug 14, 2020	BUY	$129.79 - $170.94 $190,012 - $250,256	1,464 Added 1.43%	103,855 $17.5 Million
Q1 2020 May 15, 2020	BUY	$115.95 - $177.22 $11 Million - $16.8 Million	94,696 Added 1230.62%	102,391 $13.9 Million
Q4 2019 Feb 14, 2020	SELL	$139.48 - $172.23 $30.9 Million - $38.1 Million	-221,210 Reduced 96.64%	7,695 $1.33 Million
Q3 2019 Nov 14, 2019	SELL	$146.89 - $161.41 $58.6 Million - $64.4 Million	-399,173 Reduced 63.55%	228,905 $33.7 Million
Q2 2019 Aug 14, 2019	BUY	$129.99 - $153.97 $34.5 Million - $40.9 Million	265,430 Added 73.19%	628,078 $96.7 Million
Q1 2019 May 15, 2019	BUY	$121.3 - $146.95 $37.2 Million - $45 Million	306,449 Added 545.29%	362,648 $0
Q4 2018 Feb 14, 2019	BUY	$119.37 - $153.29 $1.48 Million - $1.91 Million	12,439 Added 28.43%	56,199 $7.26 Million
Q3 2018 Nov 13, 2018	BUY	$131.3 - $153.75 $800,798 - $937,721	6,099 Added 16.19%	43,760 $0
Q2 2018 Aug 10, 2018	BUY	$111.38 - $137.03 $3.93 Million - $4.83 Million	35,241 Added 1456.24%	37,661 $0
Q1 2018 May 11, 2018	SELL	$103.82 - $123.9 $1.69 Million - $2.01 Million	-16,231 Reduced 87.02%	2,420 $286,000
Q4 2017 Feb 09, 2018	BUY	$111.14 - $123.05 $2.07 Million - $2.3 Million	18,651	18,651 $2.09 Million

Others Institutions Holding ICLR

# of Institutions

585

Shares Held

73.8M

Call Options Held

115K

Put Options Held

104K

View Full List

About ICON PLC

Ticker ICLR
Exchange NASDAQ
Sector Healthcare
Industry Diagnostics & Research
Shares Outstandng 81,526,600
Market Cap $13.2B
Description
ICON Public Limited Company, a clinical research organization, provides outsourced development and commercialization services in Ireland, rest of Europe, the United States, and internationally. The company specializes in the strategic development, management, and analysis of programs that support various stages of the clinical development proces...

More about ICLR

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