Amphastar Pharmaceuticals, Inc. (AMPH) - Dilution Analysis

Visualizing historical and potential share dilution over time

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Dilution Analysis

Low Risk

Limited dilution potential

Last updated: May 07, 2026

Risk Assessment Details

Potential Dilution: 5.32% of current shares

Recent Dilution: 0% (2 years)

Historical Dilution Factor: minimal recent dilution

Outstanding Shares

45M

Potential Supply

2.4M

Additional shares possible

Splits

None

Past 2 years

Summary

AMPH currently has 45.3M outstanding shares. with limited dilution risk as only 2.41M additional shares (5.3%) are authorized for issuance. The company has not diluted shareholders through share issuances in the past 2 years, which is positive for existing holders.

Share Structure Timeline

Outstanding Shares

Total Supply

Historical Data Points

Date	Event	Outstanding	Supply
May 07, 2026	10-Q filing \| 45.3M shares outstanding	45M	2.4M
Nov 06, 2025	10-Q filing \| 46.5M shares outstanding	46M	1.3M
Aug 07, 2025	10-Q filing \| 46.9M shares outstanding	47M	780K
May 08, 2025	10-Q filing \| 47.6M shares outstanding	48M	90K
Mar 03, 2025	10-K filing \| 48.4M shares outstanding	48M	0
Nov 07, 2024	10-Q filing \| 48.6M shares outstanding	49M	0
Aug 09, 2024	10-Q filing \| 48.9M shares outstanding	49M	0
May 10, 2024	10-Q filing \| 48.2M shares outstanding	48M	0
Feb 29, 2024	10-K filing \| 48.3M shares outstanding	48M	0
Nov 08, 2023	10-Q filing \| 48.7M shares outstanding	49M	0
Aug 09, 2023	10-Q filing \| 48.4M shares outstanding	48M	0
May 09, 2023	10-Q filing \| 48.0M shares outstanding	48M	0
Mar 01, 2023	10-K filing \| 48.6M shares outstanding	49M	0
Nov 08, 2022	10-Q filing \| 48.9M shares outstanding	49M	0
Aug 09, 2022	10-Q filing \| 48.9M shares outstanding	49M	0
May 10, 2022	10-Q filing \| 48.1M shares outstanding	48M	0
Mar 11, 2022	10-K filing \| 47.8M shares outstanding	48M	0
Nov 09, 2021	S-3 filing: Amphastar Pharmaceuticals, Inc. is filing an S-3 form to register securities for sale up to an aggregate offering price of $250,000,000.	48M	0
Nov 09, 2021	10-Q filing \| 48.0M shares outstanding	48M	0
Aug 09, 2021	10-Q filing \| 47.7M shares outstanding	48M	0
May 07, 2021	10-Q filing \| 47.5M shares outstanding	48M	0
Mar 15, 2021	10-K filing \| 47.0M shares outstanding	47M	0
Nov 06, 2020	10-Q filing \| 47.5M shares outstanding	47M	0
Aug 07, 2020	10-Q filing \| 46.8M shares outstanding	47M	0
May 11, 2020	10-Q filing \| 46.7M shares outstanding	47M	0
Mar 16, 2020	10-K filing \| 46.1M shares outstanding	46M	0

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