Quick Answer
ALNYLAM PHARMACEUTICALS, INC. reported Shares Outstanding of 132.38 million shares for fiscal year 2025.
ALNYLAM PHARMACEUTICALS, INC. Shares Outstanding — Annual History
| Fiscal Year | Shares Outstanding | YoY Change |
|---|---|---|
| 2025 | 132.38M | +2.4% |
| 2024 | 129.29M | +2.8% |
| 2023 | 125.79M | +1.5% |
| 2022 | 123.92M | +3.1% |
| 2021 | 120.18M | +3.2% |
| 2020 | 116.43M | +3.8% |
| 2019 | 112.19M | +10.9% |
| 2018 | 101.18M | +1.5% |
| 2017 | 99.67M | +16.0% |
| 2016 | 85.94M | +1.0% |
| 2015 | 85.09M | +10.2% |
| 2014 | 77.20M | +21.1% |
| 2013 | 63.74M | +21.4% |
| 2012 | 52.49M | +22.9% |
| 2011 | 42.72M | +0.9% |
| 2010 | 42.34M | +1.2% |
| 2009 | 41.84M | — |
Quarterly Shares Outstanding
| Quarter Ending | Shares Outstanding | YoY | QoQ |
|---|---|---|---|
| September 30, 2025 | 131.79M | +2.3% | +0.6% |
| June 30, 2025 | 130.98M | +2.3% | +0.5% |
| March 31, 2025 | 130.31M | +3.0% | +0.8% |
| December 31, 2024 | 129.29M | +2.8% | +0.4% |
| September 30, 2024 | 128.84M | +2.7% | +0.6% |
| June 30, 2024 | 128.02M | +2.5% | +1.2% |
| March 31, 2024 | 126.46M | +1.8% | +0.5% |
| December 31, 2023 | 125.79M | +1.5% | +0.3% |
- ALNYLAM PHARMACEUTICALS, INC. showed an increase of +2.4% in Shares Outstanding compared to the prior fiscal year.
- Over the 2009–2025 period, ALNYLAM PHARMACEUTICALS, INC.’s shares outstanding has grown by 216.4% (from 41.84 million shares to 132.38 million shares).
- The most recent figure is from ALNYLAM PHARMACEUTICALS, INC.’s fiscal year 2025 report (Form 10-K), filed with the SEC on February 12, 2026.
- All figures are sourced from SEC EDGAR XBRL filings, last verified June 17, 2026.
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