89bio, Inc. (ETNB) - Dilution Analysis

Visualizing historical and potential share dilution over time

Dilution Analysis

Medium Risk
Moderate dilution risk
Last updated: October 30, 2025

Risk Assessment Details

Potential Dilution: 0.0% of current shares
Recent Dilution: 51.72% (2 years)
Historical Dilution Factor: significant recent dilution
Outstanding Shares
160M
Potential Supply
0
Additional shares possible
Splits
None
Past 2 years

Summary

ETNB currently has 158M outstanding shares. with minimal authorized share overhang for future dilution. The company has significantly diluted shareholders by 51.72% over the past 2 years, indicating aggressive capital raising.

Share Structure Timeline

Outstanding Shares
Total Supply

Historical Data Points

Date Event Outstanding Supply
Oct 30, 2025

POS AM filing: 89bio, Inc. is filing post-effective amendments to deregister any and all securities registered but unsold under the Registration Statements on Form S-3 due to a merger with Roche Holdings, Inc.

160M 0
Aug 08, 2025

10-Q filing | 157.9M shares outstanding

160M 0
May 02, 2025

10-Q filing | 146.4M shares outstanding

150M 0
Feb 27, 2025

10-K filing | 146.0M shares outstanding

150M 0
Nov 07, 2024

10-Q filing | 107.1M shares outstanding

110M 0
Aug 05, 2024

10-Q filing | 99.8M shares outstanding

100M 0
May 09, 2024

10-Q filing | 95.8M shares outstanding

96M 0
Mar 01, 2024

10-K filing | 93.5M shares outstanding

94M 0
Nov 09, 2023

10-Q filing | 76.3M shares outstanding

76M 0
Aug 09, 2023

10-Q filing | 74.1M shares outstanding

74M 0
May 08, 2023

10-Q filing | 72.9M shares outstanding

73M 0
Mar 15, 2023

10-K filing | 52.2M shares outstanding

52M 10M
Feb 10, 2023

S-3/A filing: This is an S-3/A filing registering an indeterminate amount of common stock, preferred stock, debt securities, warrants and/or units up to $500,000,000.

47M 15M
Jan 31, 2023

S-3 filing: The company may issue up to $500,000,000 in aggregate principal amount of common stock, preferred stock, debt securities, warrants and/or units.

47M 18M
Nov 10, 2022

10-Q filing | 47.3M shares outstanding

47M 0
Aug 11, 2022

10-Q filing | 39.1M shares outstanding

39M 0
May 12, 2022

10-Q filing | 20.4M shares outstanding

20M 1.5M
Mar 24, 2022

10-K filing | 20.4M shares outstanding

20M 1.5M
Nov 12, 2021

10-Q filing | 20.3M shares outstanding

20M 1.5M
Aug 13, 2021

10-Q filing | 20.1M shares outstanding

20M 1.7M
May 14, 2021

10-Q filing | 20.1M shares outstanding

20M 1.8M
Mar 25, 2021

S-3 filing: The filing is for a shelf offering of common stock, preferred stock, debt securities, warrants and/or units up to $250,000,000. Also, includes an ATM offering of common stock up to $75,000,000.

20M 1.9M
Mar 25, 2021

10-K filing | 19.9M shares outstanding

20M 1.9M
Nov 13, 2020

10-Q filing | 19.9M shares outstanding

20M 0
Sep 14, 2020

S-1 filing: 89bio, Inc. is selling 2,700,000 shares of common stock, and selling stockholders are selling 300,000 shares of common stock in an S-1 filing.

17M 2.2M
Aug 13, 2020

10-Q filing | 16.9M shares outstanding

17M 0
Jul 06, 2020

S-1 filing: The company is offering 2,200,000 shares of common stock at a price of $27.60 per share.

14M 2.2M
May 13, 2020

10-Q filing | 13.8M shares outstanding

14M 0
Mar 18, 2020

10-K filing | 13.8M shares outstanding

14M 0
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