IONIS PHARMACEUTICALS INC (IONS) - Dilution Analysis

Visualizing historical and potential share dilution over time

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Dilution Analysis

Medium Risk

Moderate dilution risk

Last updated: April 29, 2026

Risk Assessment Details

Potential Dilution: 0.0% of current shares

Recent Dilution: 12.44% (2 years)

Historical Dilution Factor: moderate recent dilution

Outstanding Shares

160M

Potential Supply

Additional shares possible

Splits

None

Past 2 years

Summary

IONS currently has 165M outstanding shares. with minimal authorized share overhang for future dilution. The company has diluted shareholders by 12.44% over the past 2 years through share issuances.

Share Structure Timeline

Outstanding Shares

Total Supply

Historical Data Points

Date	Event	Outstanding
Apr 29, 2026	10-Q filing \| 164.9M shares outstanding	160M
Oct 29, 2025	10-Q filing \| 159.8M shares outstanding	160M
Jul 30, 2025	10-Q filing \| 159.1M shares outstanding	160M
Apr 30, 2025	10-Q filing \| 158.7M shares outstanding	160M
Feb 19, 2025	10-K filing \| 149.5M shares outstanding	150M
Nov 06, 2024	10-Q filing \| 148.6M shares outstanding	150M
Aug 01, 2024	10-Q filing \| 146.0M shares outstanding	150M
May 07, 2024	10-Q filing \| 145.5M shares outstanding	150M
Feb 21, 2024	10-K filing \| 143.2M shares outstanding	140M
Nov 02, 2023	10-Q filing \| 143.3M shares outstanding	140M
Aug 09, 2023	10-Q filing \| 143.1M shares outstanding	140M
May 03, 2023	10-Q filing \| 142.7M shares outstanding	140M
Feb 22, 2023	10-K filing \| 141.8M shares outstanding	140M
Nov 09, 2022	10-Q filing \| 142.0M shares outstanding	140M
Aug 09, 2022	10-Q filing \| 141.8M shares outstanding	140M
May 04, 2022	10-Q filing \| 141.6M shares outstanding	140M
Feb 25, 2022	10-K filing \| 141.0M shares outstanding	140M
Nov 03, 2021	10-Q filing \| 141.1M shares outstanding	140M
Aug 04, 2021	10-Q filing \| 141.0M shares outstanding	140M
May 05, 2021	10-Q filing \| 140.8M shares outstanding	140M
Feb 24, 2021	10-K filing \| 139.6M shares outstanding	140M
Nov 04, 2020	10-Q filing \| 139.7M shares outstanding	140M
Aug 05, 2020	10-Q filing \| 139.4M shares outstanding	140M
May 06, 2020	10-Q filing \| 139.4M shares outstanding	140M
Mar 02, 2020	10-K filing \| 140.0M shares outstanding	140M

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