As of Nov 13, 2026, ALNY's PEG ratio of 0 reflects its valuation relative to its growth rate. This result reflects a P/E ratio of 8.1 measured against EPS growth of 2189.9%. When benchmarked against the trailing 4-quarter average of 0.28, ALNY's PEG ratio reflects a 100% decrease.
Alnylam Pharmaceuticals's two years historical PEG ratio averages out to 0.99. Compared to historical data, ALNY's 0.0 PEG ratio represents a decrease of 100%. ALNY hit its maximum PEG ratio of 3.82 during the Sep 2025 quarter over the last two years. The Sep 2026 quarter marked the lowest reading at 0.01, indicating the most attractive growth-adjusted valuation.
| Year | PEG ratio | PE ratio | Growth YoY |
|---|---|---|---|
| 2025 | 0.79 | 166.38 | 209.6% |
| 2024 | N/A | N/A | 38.1% |
| 2023 | N/A | N/A | 62.2% |
| 2022 | N/A | N/A | -29.2% |
| 2021 | N/A | N/A | 3.5% |
| 2020 | N/A | N/A | 8% |
| 2019 | N/A | N/A | -7.1% |
| 2018 | N/A | N/A | -39.7% |
| 2017 | N/A | N/A | -13.2% |
| 2016 | N/A | N/A | -38.8% |
| 2015 | N/A | N/A | 28.9% |
| 2014 | N/A | N/A | -234.5% |
| 2013 | N/A | N/A | 31.3% |
| 2012 | N/A | N/A | -55.1% |
| 2011 | N/A | N/A | -30.8% |
| Year | PEG ratio | PE ratio | Growth YoY |
|---|---|---|---|
| Sep 2026 | 0.01 | 12.11 | 2,189.9% |
| Jun 2026 | 0.12 | 46.89 | 390.5% |
| Mar 2026 | 0.2 | 71.31 | 359.2% |
| Dec 2025 | 0.79 | 166.38 | 209.6% |
| Sep 2025 | 3.82 | 512.36 | 134.1% |
| Jun 2025 | N/A | N/A | -294.6% |
| Mar 2025 | N/A | N/A | 32.2% |
| Dec 2024 | N/A | N/A | 38.1% |
| Sep 2024 | N/A | N/A | 36.5% |
| Jun 2024 | N/A | N/A | 93.5% |
| Mar 2024 | N/A | N/A | 69.6% |
| Dec 2023 | N/A | N/A | 62.2% |
| Sep 2023 | N/A | N/A | 57.9% |
| Jun 2023 | N/A | N/A | -5.4% |
| Mar 2023 | N/A | N/A | -16% |
Measured against past performance, ALNY's PEG ratio comes in under the 3, 5 and 10-year averages.
ALNY has a PEG ratio of 0, per Nov 13, 2026 data.
Across the past 3 years, ALNY's PEG ratio has centered around 0.99.
Across the past 5 years, ALNY's PEG ratio has centered around 0.99.
The Sep 2025 quarter marked the two years high at 3.82 for ALNY's PEG ratio.
At present, ALNY's PEG ratio runs 100% lower than its 2-year historical average.
At 0, ALNY's PEG ratio suggests the stock may be undervalued given its growth rate.
The PEG ratio derives from taking PE and dividing by the rate at which earnings are growing (YoY TTM). As of Nov 13, 2026, Alnylam Pharmaceuticals carries a PE ratio of 8.1. Earnings grew at 2189.9% over the TTM period ending Sep 2026. Applying the formula, this yields a PEG ratio of 0. PEG RATIO(0) = PE RATIO(8.1) / EPS GROWTH(2189.9%)
All PEG ratio stats are based on quarterly TTM periods, unless otherwise specified.