Frontier Capital Management CO LLC Alnylam Pharmaceuticals, Inc. Transaction History

Frontier Capital Management CO LLC

$10 Billion
Q3 2025

A detailed history of Frontier Capital Management CO LLC transactions in Alnylam Pharmaceuticals, Inc. stock. As of the latest transaction made, Frontier Capital Management CO LLC holds 118,878 shares of ALNY stock, worth $53.4 Million. This represents 0.54% of its overall portfolio holdings.

Number of Shares

118,878

Previous 103,003 15.41%

Holding current value

$53.4 Million

Previous $33.6 Million 61.39%

% of portfolio

0.54%

Previous 0.34%

22 transactions

Quarter	Operation	Price Per share	shares change	shares Held
Q3 2025 Nov 14, 2025	BUY	$311.12 - $482.13 $4.94 Million - $7.65 Million	15,875 Added 15.41%	118,878 $54.2 Million
Q2 2025 Aug 14, 2025	BUY	$224.32 - $326.09 $130,778 - $190,110	583 Added 0.57%	103,003 $33.6 Million
Q1 2025 May 15, 2025	SELL	$233.07 - $290.7 $535,594 - $668,028	-2,298 Reduced 2.19%	102,420 $27.7 Million
Q4 2024 Feb 14, 2025	SELL	$232.27 - $300.43 $1.51 Million - $1.96 Million	-6,513 Reduced 5.86%	104,718 $24.6 Million
Q3 2024 Nov 14, 2024	SELL	$233.81 - $287.01 $13.4 Million - $16.4 Million	-57,211 Reduced 33.96%	111,231 $30.6 Million

Q2 2024 Aug 14, 2024	BUY	$143.31 - $247.0 $24.1 Million - $41.6 Million	168,442 New	168,442 $40.9 Million
Q3 2021 Oct 19, 2021	SELL	$169.75 - $207.73 $7.78 Million - $9.52 Million	-45,822 Closed	0 $0
Q2 2021 Aug 09, 2021	BUY	$128.63 - $176.89 $5.89 Million - $8.11 Million	45,822 New	45,822 $7.77 Million
Q1 2021 May 13, 2021	SELL	$126.83 - $175.69 $601,935 - $833,824	-4,746 Closed	0 $0
Q3 2020 Nov 16, 2020	SELL	$121.19 - $165.49 $12,603 - $17,210	-104 Reduced 2.14%	4,746 $691,000
Q2 2020 Jul 17, 2020	SELL	$104.21 - $156.44 $3.56 Million - $5.35 Million	-34,187 Reduced 87.58%	4,850 $718,000
Q1 2020 Apr 16, 2020	SELL	$93.12 - $133.99 $1.16 Million - $1.67 Million	-12,447 Reduced 24.18%	39,037 $4.25 Million
Q4 2019 Feb 14, 2020	SELL	$74.51 - $124.23 $3.12 Million - $5.2 Million	-41,885 Reduced 44.86%	51,484 $5.93 Million
Q3 2019 Nov 14, 2019	BUY	$70.9 - $87.82 $1.32 Million - $1.64 Million	18,680 Added 25.01%	93,369 $7.51 Million
Q2 2019 Aug 14, 2019	BUY	$65.86 - $92.79 $432,239 - $608,980	6,563 Added 9.63%	74,689 $5.42 Million
Q1 2019 May 07, 2019	SELL	$72.76 - $93.45 $9.44 Million - $12.1 Million	-129,743 Reduced 65.57%	68,126 $6.37 Million
Q4 2018 Jan 25, 2019	BUY	$62.67 - $88.33 $12 Million - $16.9 Million	191,629 Added 3070.98%	197,869 $14.4 Million
Q3 2018 Oct 30, 2018	SELL	$87.52 - $122.67 $2.62 Million - $3.68 Million	-29,960 Reduced 82.76%	6,240 $546,000
Q2 2018 Aug 03, 2018	BUY	$88.31 - $107.8 $809,272 - $987,879	9,164 Added 33.9%	36,200 $3.57 Million
Q1 2018 Apr 30, 2018	SELL	$115.92 - $148.54 $770,288 - $987,048	-6,645 Reduced 19.73%	27,036 $3.22 Million
Q4 2017 Jan 18, 2018	SELL	$114.49 - $139.98 $5.82 Million - $7.11 Million	-50,820 Reduced 60.14%	33,681 $4.28 Million
Q3 2017 Oct 31, 2017	BUY	$72.53 - $118.27 $6.13 Million - $9.99 Million	84,501	84,501 $9.93 Million

Others Institutions Holding ALNY

# of Institutions

916

Shares Held

117M

Call Options Held

1.25M

Put Options Held

1.49M

View Full List

About ALNYLAM PHARMACEUTICALS, INC.

Ticker ALNY
Exchange NASDAQ
Sector Healthcare
Industry Biotechnology
Shares Outstandng 123,028,000
Market Cap $55.3B
Description
Alnylam Pharmaceuticals, Inc., a biopharmaceutical company, focuses on discovering, developing, and commercializing novel therapeutics based on ribonucleic acid interference. The company's pipeline of investigational RNAi therapeutics focuses on genetic medicines, cardio-metabolic diseases, hepatic infectious diseases, and central nervous system...

More about ALNY

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Frontier Capital Management CO LLC Alnylam Pharmaceuticals, Inc. Transaction History