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ALNY
Alnylam Pharmaceuticals Inc.Stock · Health Care · Nasdaq-100 0.2%
$227.00+$3.05 (+1.36%)as of market close, Aug 13, 2026
☾ After hours:$227.12+0.00%3:59 PM ET
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ALNY monthly returns

Alnylam Pharmaceuticals Inc. has averaged 2.47% per month, positive in 53% of months. Month-by-month returns for Alnylam Pharmaceuticals Inc. (ALNY) below, through August 13, 2026 — the table lists the most recent months; the bar chart plots the last 5 years.

Average month
+2.5%
260 months
Best month
+63.7%
Jun 2024
Worst month
-47.5%
Oct 2016
Positive months
53%
of all months

Alnylam Pharmaceuticals Inc. monthly returns#

Alnylam Pharmaceuticals Inc. total return by month
MonthTotal return
Aug 2026
+10.5%
Jul 2026
-31.7%
Jun 2026
-0.3%
May 2026
-2.4%
Apr 2026
-6.5%
Mar 2026
-0.6%
Feb 2026
-1.5%
Jan 2026
-15.0%
Dec 2025
-11.9%
Nov 2025
-1.1%
Oct 2025
+0.0%
Sep 2025
+2.1%

Monthly total return (since Sep 2021)

-60%-40%-20%+0%+20%+40%+60%
20222023202420252026

Methodology#

Monthly returns are total returns (dividends reinvested), computed from ALNY's split- and dividend-adjusted month-end closes. The table shows the most recent 120 months and the bar chart the most recent 60. See the year-by-year returns for the annual view. Past performance does not predict future returns; not investment advice.

See also: S&P 500 · Nasdaq-100 · Dow Jones · Russell 2000 · US Bond Market · Gold · Silver · Bitcoin · Ethereum

FAQ#

What is Alnylam Pharmaceuticals Inc.'s average monthly return?
Alnylam Pharmaceuticals Inc. (ALNY) has averaged about 2.47% per month, positive in roughly 53% of months. The best month was Jun 2024 (+63.7%) and the worst was Oct 2016 (-47.5%).