Historical Stock Price
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Date Open High Low Close Volume
05/15/2025 $269.53 $285.00 $266.18 $283.40 1.26M
05/16/2025 $281.02 $289.75 $280.60 $285.31 1.19M
05/19/2025 $287.44 $296.80 $285.41 $291.86 929.50K
05/20/2025 $292.28 $292.99 $288.25 $291.68 627.30K
05/21/2025 $291.50 $298.23 $288.74 $292.58 930.20K
Alnylam Pharmaceuticals, Inc. is a biopharmaceutical company focused on RNA interference (RNAi) therapeutics. Its marketed products include AMVUTTRA for hereditary transthyretin-mediated amyloidosis with polyneuropathy, ONPATTRO for polyneuropathy of hATTR amyloidosis, GIVLAARI for acute hepatic porphyria, OXLUMO for primary hyperoxaluria type 1, and Leqvio, developed with Novartis, for hypercholesterolemia or mixed dyslipidemia. The company also develops treatments for complement-mediated diseases, alpha-1 liver disease, and other conditions, including Cemdisiran, Belcesiran, Elebsiran, Zilebesiran, ALN-APP, ALN-HSD, and Fitusiran.
ALNY historical stock prices picture
Alnylam Pharmaceuticals (ALNY) has the following price history information. Looking back at ALNY historical stock prices for the last five trading days, on May 15, 2025, ALNY opened at $269.53, traded as high as $285.00 and as low as $266.18, and closed at $283.40. Trading volume was a total of 1.26M shares. On May 16, 2025, ALNY opened at $281.02, traded as high as $289.75 and as low as $280.60, and closed at $285.31. Trading volume was a total of 1.19M shares. On May 19, 2025, ALNY opened at $287.44, traded as high as $296.80 and as low as $285.41, and closed at $291.86. Trading volume was a total of 929.50K shares. On May 20, 2025, ALNY opened at $292.28, traded as high as $292.99 and as low as $288.25, and closed at $291.68. Trading volume was a total of 627.30K shares. On May 21, 2025, ALNY opened at $291.50, traded as high as $298.23 and as low as $288.74, and closed at $292.58. Trading volume was a total of 930.20K shares.

ALNY Historical Stock Prices By Date:

ALNY historical cagr picture

Below, we examine the compound annual growth rate — CAGR for short — of an investment into Alnylam Pharmaceuticals shares, starting with a $10,000 purchase of ALNY, and working forward through the historical stock price information to today.

Growth of $10,000.00
Without Dividends Reinvested

Start date: 05/26/2015
End date: 05/21/2025
Start price/share: $127.87
End price/share: $292.58
Dividends collected/share: $0.00
Total return: 128.81%
Average Annual Total Return: 8.63%
Starting investment: $10,000.00
Ending investment: $22,871.82
Years: 9.99
Date Close
05/15/2025$283.40
05/16/2025$285.31
05/19/2025$291.86
05/20/2025$291.68
05/21/2025$292.58
ALNY is categorized under the Healthcare sector; below are some other companies in the same sector:

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Also explore: ALNY shares outstanding history

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