Altimmune, Inc. (ALT) - Dilution Analysis

Visualizing historical and potential share dilution over time

Dilution Analysis

Medium Risk
Moderate dilution risk
Last updated: May 13, 2026

Risk Assessment Details

Potential Dilution: 0.0% of current shares
Recent Dilution: 78.76% (2 years)
Historical Dilution Factor: significant recent dilution
Outstanding Shares
120M
Potential Supply
0
Additional shares possible
Splits
None
Past 2 years

Summary

ALT currently has 124M outstanding shares. with minimal authorized share overhang for future dilution. The company has significantly diluted shareholders by 78.76% over the past 2 years, indicating aggressive capital raising.

Share Structure Timeline

Outstanding Shares
Total Supply

Historical Data Points

Date Event Outstanding Supply
May 13, 2026

10-Q filing | 124.5M shares outstanding

120M 0
Jan 28, 2026

8-K filing: Altimmune, Inc. entered into a Securities Purchase Agreement for a registered direct offering of 12,397,920 shares of common stock and pre-funded warrants to purchase up to 4,647,534 additional shares, with gross proceeds of approximately $75 million before expenses. ($75.0M proceeds)

81M 0
Nov 13, 2025

S-3/A filing: The filing is an S-3/A form, indicating an amendment to a previously filed S-3 registration statement, concerning the offering of securities for general corporate purposes.

81M 0
Nov 06, 2025

S-3 filing: This is a financial document parser specializing in SEC filings. The filing is an S-3 form filed on 2025-11-06.

81M 0
Nov 06, 2025

10-Q filing | 89.4M shares outstanding

89M 0
Aug 12, 2025

10-Q filing | 81.5M shares outstanding

81M 0
May 13, 2025

10-Q filing | 75.5M shares outstanding

76M 4.2M
Feb 27, 2025

10-K filing | 71.0M shares outstanding

71M 8.7M
Feb 27, 2025

S-3 filing: The company is offering shares of its common stock through an at-the-market offering for up to $150 million, with the intention of using the net proceeds for working capital and general corporate purposes.

72M 7.4M
Nov 12, 2024

10-Q filing | 71.1M shares outstanding

71M 0
Aug 08, 2024

10-Q filing | 70.9M shares outstanding

71M 0
May 09, 2024

10-Q filing | 70.8M shares outstanding

71M 0
Mar 27, 2024

10-K filing | 70.7M shares outstanding

71M 0
Nov 07, 2023

10-Q filing | 53.6M shares outstanding

54M 1.6M
Aug 10, 2023

10-Q filing | 50.7M shares outstanding

51M 4.5M
May 11, 2023

10-Q filing | 50.1M shares outstanding

50M 5.1M
Feb 28, 2023

10-K filing | 46.9M shares outstanding

47M 8.3M
Nov 10, 2022

10-Q filing | 49.3M shares outstanding

49M 5.9M
Aug 11, 2022

10-Q filing | 47.5M shares outstanding

48M 7.7M
May 12, 2022

10-Q filing | 44.0M shares outstanding

44M 11M
Mar 15, 2022

10-K filing | 41.3M shares outstanding

41M 14M
Nov 09, 2021

10-Q filing | 39.7M shares outstanding

40M 15M
Aug 10, 2021

10-Q filing | 39.7M shares outstanding

40M 16M
May 17, 2021

10-Q filing | 38.4M shares outstanding

38M 17M
Feb 25, 2021

10-K filing | 37.2M shares outstanding

37M 18M
Dec 31, 2020

S-3 filing: The company may offer up to $250,000,000 of any combination of common stock, preferred stock, debt securities, warrants and/or units.

33M 22M
Nov 09, 2020

10-Q filing | 33.1M shares outstanding

33M 0
Aug 11, 2020

10-Q filing | 32.9M shares outstanding

33M 0
May 13, 2020

10-Q filing | 15.5M shares outstanding

16M 0
Mar 27, 2020

10-K filing | 15.4M shares outstanding

15M 0
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