ALNYLAM PHARMACEUTICALS, INC. (ALNY) - Dilution Analysis

Visualizing historical and potential share dilution over time

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Dilution Analysis

Low Risk

Limited dilution potential

Last updated: April 30, 2026

Risk Assessment Details

Potential Dilution: 0.0% of current shares

Recent Dilution: 5.52% (2 years)

Historical Dilution Factor: minimal recent dilution

Outstanding Shares

130M

Potential Supply

Additional shares possible

Splits

None

Past 2 years

Summary

ALNY currently has 133M outstanding shares. with minimal authorized share overhang for future dilution. The company has minimally diluted shareholders by 5.52% over the past 2 years.

Share Structure Timeline

Outstanding Shares

Total Supply

Historical Data Points

Date	Event	Outstanding
Apr 30, 2026	10-Q filing \| 132.9M shares outstanding	130M
Jul 31, 2025	10-Q filing \| 130.6M shares outstanding	130M
May 01, 2025	10-Q filing \| 129.7M shares outstanding	130M
Feb 13, 2025	10-K filing \| 127.7M shares outstanding	130M
Oct 31, 2024	10-Q filing \| 128.6M shares outstanding	130M
Aug 01, 2024	10-Q filing \| 126.7M shares outstanding	130M
May 02, 2024	10-Q filing \| 126.1M shares outstanding	130M
Feb 15, 2024	10-K filing \| 124.9M shares outstanding	120M
Nov 02, 2023	10-Q filing \| 125.2M shares outstanding	130M
Aug 03, 2023	10-Q filing \| 124.7M shares outstanding	120M
May 04, 2023	10-Q filing \| 124.1M shares outstanding	120M
Feb 23, 2023	10-K filing \| 121.7M shares outstanding	120M
Oct 27, 2022	10-Q filing \| 122.2M shares outstanding	120M
Jul 28, 2022	10-Q filing \| 120.9M shares outstanding	120M
Apr 28, 2022	10-Q filing \| 120.4M shares outstanding	120M
Feb 10, 2022	10-K filing \| 118.5M shares outstanding	120M
Oct 28, 2021	10-Q filing \| 119.1M shares outstanding	120M
Aug 03, 2021	10-Q filing \| 117.8M shares outstanding	120M
Apr 29, 2021	10-Q filing \| 117.5M shares outstanding	120M
Feb 11, 2021	10-K filing \| 117.0M shares outstanding	120M
Nov 05, 2020	10-Q filing \| 116.2M shares outstanding	120M
Aug 06, 2020	10-Q filing \| 116.0M shares outstanding	120M
May 06, 2020	10-Q filing \| 114.8M shares outstanding	110M
Feb 13, 2020	10-K filing \| 112.6M shares outstanding	110M

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