Annexon, Inc. (ANNX) - Dilution Analysis

Visualizing historical and potential share dilution over time

Dilution Analysis

High Risk
Significant dilution risk
Last updated: May 07, 2026

Risk Assessment Details

Potential Dilution: 27.55% of current shares
Recent Dilution: 62.58% (2 years)
Historical Dilution Factor: significant recent dilution
Outstanding Shares
160M
Potential Supply
45M
Additional shares possible
Splits
None
Past 2 years

Summary

ANNX currently has 164M outstanding shares. with moderate dilution risk from 45.1M authorized shares representing 27.5% potential dilution. The company has significantly diluted shareholders by 62.58% over the past 2 years, indicating aggressive capital raising.

Share Structure Timeline

Outstanding Shares
Total Supply

Historical Data Points

Date Event Outstanding Supply
May 07, 2026

10-Q filing | 163.8M shares outstanding

160M 45M
Mar 30, 2026

10-K filing | 155.1M shares outstanding

160M 45M
Nov 10, 2025

10-Q filing | 119.6M shares outstanding

120M 45M
Aug 14, 2025

10-Q filing | 109.9M shares outstanding

110M 45M
May 12, 2025

10-Q filing | 109.7M shares outstanding

110M 45M
Mar 03, 2025

10-K filing | 109.7M shares outstanding

110M 45M
Nov 14, 2024

10-Q filing | 106.6M shares outstanding

110M 45M
Aug 12, 2024

S-3 filing: This prospectus covers the possible offer and resale by selling stockholders from time to time of up to an aggregate of 3,000,000 shares of our common stock in one or more offerings.

92M 45M
Aug 12, 2024

10-Q filing | 105.7M shares outstanding

110M 45M
May 13, 2024

10-Q filing | 92.4M shares outstanding

92M 42M
Mar 26, 2024

S-3 filing: The company is filing an S-3 to register the offer and sale of up to $400,000,000 of any combination of common stock, preferred stock, debt securities, warrants and units.

53M 42M
Mar 26, 2024

10-K filing | 90.0M shares outstanding

90M 42M
Nov 13, 2023

10-Q filing | 53.2M shares outstanding

53M 42M
Aug 07, 2023

10-Q filing | 53.2M shares outstanding

53M 42M
May 08, 2023

10-Q filing | 53.1M shares outstanding

53M 42M
Mar 06, 2023

10-K filing | 54.7M shares outstanding

55M 42M
Nov 04, 2022

S-3 filing: This is an S-3 filing for the resale of 42,137,548 shares of common stock by selling securityholders.

9M 42M
Nov 03, 2022

10-Q filing | 47.6M shares outstanding

48M 0
Aug 08, 2022

10-Q filing | 47.6M shares outstanding

48M 0
May 09, 2022

10-Q filing | 38.6M shares outstanding

39M 0
Mar 02, 2022

POS AM filing: Annexon, Inc. files a POS AM to offer and sell up to $300,000,000 in the aggregate of common stock, preferred stock, and debt securities from time to time in one or more offerings through underwriters, dealers, agents, or directly to purchasers.

39M 0
Mar 01, 2022

10-K filing | 38.6M shares outstanding

39M 0
Nov 09, 2021

10-Q filing | 38.4M shares outstanding

38M 0
Aug 16, 2021

10-Q filing | 38.3M shares outstanding

38M 0
May 17, 2021

10-Q filing | 38.3M shares outstanding

38M 0
Mar 25, 2021

10-K filing | 38.2M shares outstanding

38M 0
Nov 16, 2020

10-Q filing | 38.2M shares outstanding

38M 0
Sep 08, 2020

10-Q filing | 0.4M shares outstanding

430K 0
Jul 23, 2020

S-1/A filing: This is an S-1/A filing. It discusses recent sales of unregistered securities, including common stock options, common stock, and preferred stock.

N/A 0
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