FIBROGEN INC (FGEN) - Dilution Analysis

Visualizing historical and potential share dilution over time

Dilution Analysis

High Risk
Significant dilution risk
Last updated: May 12, 2026

Risk Assessment Details

Potential Dilution: 285.71% of current shares
Recent Dilution: 2.7% (2 years)
Historical Dilution Factor: minimal recent dilution
Outstanding Shares
4M
Potential Supply
12M
Additional shares possible
Splits
1 Split 1 Reverse
Past 2 years

Summary

FGEN currently has 4.05M outstanding shares. with significant dilution risk as 11.6M authorized shares could dilute existing holders by 285.7%. The company has minimally diluted shareholders by 2.7% over the past 2 years. Recent corporate actions include 1 stock split (positive for accessibility) and 1 reverse split (concerning signal).

Share Structure Timeline

Outstanding Shares
Total Supply

Historical Data Points

Date Event Outstanding Supply
May 12, 2026

10-Q filing | 4.0M shares outstanding

4M 12M
Mar 16, 2026

10-K filing | 4.0M shares outstanding

4M 12M
Nov 10, 2025

10-Q filing | 4.0M shares outstanding

4M 12M
Aug 11, 2025

10-Q filing | 4.0M shares outstanding

4M 12M
Jun 16, 2025
Stock Split

8-K filing: Stock split 1-for-25 | Outstanding: 100,954,000 → 4,038,160

4M 12M
May 12, 2025

10-Q filing | 101.0M shares outstanding

100M 290M
Mar 17, 2025

10-K filing | 100.0M shares outstanding

100M 290M
Nov 12, 2024

10-Q filing | 100.5M shares outstanding

100M 290M
Aug 06, 2024

10-Q filing | 99.8M shares outstanding

100M 290M
Jun 28, 2024

S-3 filing: FibroGen, Inc. may offer and sell up to an aggregate amount of $300,000,000 of any combination of common stock, preferred stock, and/or debt securities.

99M 290M
May 06, 2024

10-Q filing | 99.0M shares outstanding

99M 0
Feb 26, 2024

10-K filing | 97.3M shares outstanding

97M 0
Nov 06, 2023

10-Q filing | 98.2M shares outstanding

98M 0
Aug 07, 2023

10-Q filing | 97.7M shares outstanding

98M 0
May 08, 2023

10-Q filing | 94.7M shares outstanding

95M 0
Feb 27, 2023

10-K filing | 93.6M shares outstanding

94M 0
Nov 07, 2022

10-Q filing | 93.8M shares outstanding

94M 0
Aug 08, 2022

10-Q filing | 93.5M shares outstanding

93M 0
May 09, 2022

10-Q filing | 93.3M shares outstanding

93M 0
Feb 28, 2022

10-K filing | 93.0M shares outstanding

93M 0
Nov 09, 2021

10-Q filing | 92.6M shares outstanding

93M 0
Aug 09, 2021

10-Q filing | 92.6M shares outstanding

93M 0
May 10, 2021

10-Q filing | 92.1M shares outstanding

92M 0
Mar 01, 2021

10-K filing | 91.6M shares outstanding

92M 0
Nov 05, 2020

10-Q filing | 90.6M shares outstanding

91M 0
Aug 06, 2020

10-Q filing | 89.5M shares outstanding

89M 0
May 07, 2020

10-Q filing | 89.1M shares outstanding

89M 0
Mar 02, 2020

10-K filing | 88.0M shares outstanding

88M 0
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