Gossamer Bio, Inc. (GOSS) - Dilution Analysis

Visualizing historical and potential share dilution over time

Dilution Analysis

Medium Risk
Moderate dilution risk
Last updated: May 15, 2026

Risk Assessment Details

Potential Dilution: 65.57% of current shares
Recent Dilution: 3.52% (2 years)
Historical Dilution Factor: minimal recent dilution
Outstanding Shares
230M
Potential Supply
150M
Additional shares possible
Splits
None
Past 2 years

Summary

GOSS currently has 234M outstanding shares. with significant dilution risk as 154M authorized shares could dilute existing holders by 65.6%. The company has minimally diluted shareholders by 3.52% over the past 2 years.

Share Structure Timeline

Outstanding Shares
Total Supply

Historical Data Points

Date Event Outstanding Supply
May 15, 2026

10-Q filing | 234.1M shares outstanding

230M 150M
Mar 17, 2026

10-K filing | 228.5M shares outstanding

230M 160M
Mar 17, 2026

POS AM filing: This POS AM filing from 2026-03-17 discusses the rights of common and preferred stockholders, including dividends, liquidation preferences, and voting rights, and describes a potential offering of preferred stock with terms to be detailed in a prospectus supplement.

230M 160M
Nov 05, 2025

10-Q filing | 228.0M shares outstanding

230M 160M
Aug 05, 2025

10-Q filing | 227.3M shares outstanding

230M 160M
May 15, 2025

10-Q filing | 226.8M shares outstanding

230M 160M
Mar 13, 2025

10-K filing | 226.2M shares outstanding

230M 160M
Nov 07, 2024

10-Q filing | 226.3M shares outstanding

230M 160M
Aug 12, 2024

10-Q filing | 226.2M shares outstanding

230M 160M
May 07, 2024

10-Q filing | 225.7M shares outstanding

230M 160M
Mar 05, 2024

10-K filing | 225.6M shares outstanding

230M 160M
Nov 09, 2023

10-Q filing | 225.4M shares outstanding

230M 160M
Aug 18, 2023

S-3 filing: This S-3 filing relates to the proposed resale or other disposition by the selling securityholders of up to 129,869,440 shares of common stock and up to 32,467,360 shares of common stock issuable upon the exercise of warrants.

230M 160M
Aug 08, 2023

10-Q filing | 225.3M shares outstanding

230M 0
Jul 20, 2023

8-K filing: Gossamer Bio, Inc. entered into a securities purchase agreement for the private placement of 129,869,440 shares of common stock and accompanying warrants to purchase up to 32,467,360 shares of common stock at a combined price of $1.63125 per Share and accompanying Warrant, or with respect to any Purchaser that is an officer, director, employee or consultant of the Company $1.85125 per Share and accompanying Warrant. ($212.1M proceeds)

95M 0
May 09, 2023

10-Q filing | 94.9M shares outstanding

95M 0
Mar 17, 2023

10-K filing | 95.0M shares outstanding

95M 0
Nov 03, 2022

10-Q filing | 91.2M shares outstanding

91M 0
Aug 09, 2022

10-Q filing | 94.0M shares outstanding

94M 0
Jul 13, 2022

8-K filing: Gossamer Bio, Inc. entered into a stock purchase agreement for the private placement of 16,649,365 shares of common stock at $7.21 per share, with aggregate gross proceeds of approximately $120.0 million. ($120.0M proceeds)

76M 0
May 10, 2022

10-Q filing | 75.9M shares outstanding

76M 0
Mar 03, 2022

10-K filing | 74.8M shares outstanding

75M 0
Nov 08, 2021

10-Q filing | 75.0M shares outstanding

75M 0
Aug 09, 2021

10-Q filing | 74.7M shares outstanding

75M 0
May 06, 2021

10-Q filing | 74.1M shares outstanding

74M 0
Feb 26, 2021

10-K filing | 75.5M shares outstanding

76M 0
Nov 10, 2020

10-Q filing | 75.9M shares outstanding

76M 0
Aug 11, 2020

10-Q filing | 75.8M shares outstanding

76M 0
May 12, 2020

10-Q filing | 66.4M shares outstanding

66M 0
Mar 24, 2020

10-K filing | 66.3M shares outstanding

66M 0
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