ALUMIS INC. (ALMS) - Dilution Analysis

Visualizing historical and potential share dilution over time

Dilution Analysis

High Risk
Significant dilution risk
Last updated: May 14, 2026

Risk Assessment Details

Potential Dilution: 122.15% of current shares
Recent Dilution: 241.2% (2 years)
Historical Dilution Factor: significant recent dilution
Outstanding Shares
130M
Potential Supply
150M
Additional shares possible
Splits
None
Past 2 years

Summary

ALMS currently has 125M outstanding shares. with significant dilution risk as 153M authorized shares could dilute existing holders by 122.1%. The company has significantly diluted shareholders by 241.2% over the past 2 years, indicating aggressive capital raising.

Share Structure Timeline

Outstanding Shares
Total Supply

Historical Data Points

Date Event Outstanding Supply
May 14, 2026

10-Q filing | 125.1M shares outstanding

130M 150M
Mar 19, 2026

10-K filing | 99.1M shares outstanding

99M 150M
Jan 09, 2026

8-K filing: The Company completed a public offering of 17,650,000 shares of common stock at a price of $17.00 per share, resulting in gross proceeds of approximately $345.1 million, and the underwriters exercised their option to purchase an additional 2,647,500 shares. ($345.1M proceeds)

47M 150M
Nov 13, 2025

10-Q filing | 47.2M shares outstanding

47M 150M
Aug 13, 2025

10-Q filing | 96.9M shares outstanding

97M 150M
Jul 03, 2025

S-3 filing: Alumis Inc. files an S-3 registration statement to offer and sell up to $400,000,000 of common stock, preferred stock, debt securities, and warrants from time to time.

47M 150M
May 14, 2025

10-Q filing | 47.2M shares outstanding

47M 20M
Apr 21, 2025

8-K filing: Alumis Inc. and ACELYRIN, Inc. amended their merger agreement, with ACELYRIN shareholders receiving 0.4814 shares of Alumis common stock for each ACELYRIN share, resulting in Alumis' stockholders owning approximately 52% and ACELYRIN's stockholders owning approximately 48% of the combined company on a fully diluted basis.

47M 20M
Mar 19, 2025

10-K filing | 47.2M shares outstanding

47M 20M
Feb 06, 2025

8-K filing: Alumis Inc. entered into a Merger Agreement with ACELYRIN, Inc., where ACELYRIN will merge into a subsidiary of Alumis, with ACELYRIN stockholders receiving 0.4274 shares of Alumis Common Stock for each ACELYRIN share.

47M 20M
Nov 13, 2024

10-Q filing | 47.2M shares outstanding

47M 20M
Aug 13, 2024

10-Q filing | 47.2M shares outstanding

47M 20M
Jun 24, 2024

S-1/A filing: Alumis Inc. is offering 17,650,000 shares of common stock in an initial public offering, with an estimated price between $16.00 and $18.00 per share. Underwriters have an option to purchase up to an additional 2,647,500 shares.

N/A 20M
Jun 18, 2024

S-1/A filing: This is an S-1/A filing for an initial public offering of common stock by Alumis Inc.

N/A 0
Jun 07, 2024

S-1 filing: This is an S-1 filing for an initial public offering of common stock by Alumis Inc.

N/A 0
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