Seres Therapeutics, Inc. (MCRB) - Dilution Analysis

Visualizing historical and potential share dilution over time

Dilution Analysis

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

Risk Assessment Details

Potential Dilution: 862.34% of current shares
Recent Dilution: 16.58% (2 years)
Historical Dilution Factor: moderate recent dilution
Outstanding Shares
8.9M
Potential Supply
76M
Additional shares possible
Splits
None
Past 2 years

Summary

MCRB currently has 8.87M outstanding shares. with significant dilution risk as 76.5M authorized shares could dilute existing holders by 862.3%. The company has diluted shareholders by 16.58% over the past 2 years through share issuances.

Share Structure Timeline

Outstanding Shares
Total Supply

Historical Data Points

Date Event Outstanding Supply
Mar 12, 2026

10-K filing | 8.9M shares outstanding

8.9M 76M
Nov 05, 2025

10-Q filing | 8.8M shares outstanding

8.8M 77M
Aug 06, 2025

10-Q filing | 8.7M shares outstanding

8.7M 77M
May 07, 2025

10-Q filing | 8.7M shares outstanding

8.7M 77M
Mar 13, 2025

10-K filing | 174.4M shares outstanding

170M 0
Nov 13, 2024

10-Q filing | 170.7M shares outstanding

170M 0
Oct 01, 2024

S-3 filing: Seres Therapeutics, Inc. is offering 14,285,715 shares of common stock for resale by the selling stockholder; the company will not receive any proceeds from the sale.

150M 0
Aug 13, 2024

10-Q filing | 151.5M shares outstanding

150M 0
May 08, 2024

10-Q filing | 146.1M shares outstanding

150M 0
Mar 05, 2024

10-K filing | 151.0M shares outstanding

150M 0
Nov 02, 2023

10-Q filing | 128.3M shares outstanding

130M 0
Aug 08, 2023

S-3 filing: Seres Therapeutics intends to sell shares of its common stock from time to time through TD Cowen, acting as its agent, via an at-the-market offering for an aggregate offering price of up to $132,983,352.19.

130M 0
Aug 08, 2023

10-Q filing | 127.7M shares outstanding

130M 0
May 09, 2023

10-Q filing | 125.9M shares outstanding

130M 0
Mar 07, 2023

10-K filing | 126.1M shares outstanding

130M 0
Nov 02, 2022

10-Q filing | 122.5M shares outstanding

120M 0
Aug 03, 2022

10-Q filing | 124.1M shares outstanding

120M 0
May 04, 2022

10-Q filing | 92.2M shares outstanding

92M 0
May 04, 2022

POS AM filing: This is a POS AM filing related to exhibits including the Form of Underwriting Agreement.

92M 0
Mar 01, 2022

10-K filing | 92.0M shares outstanding

92M 0
Mar 01, 2022

POS AM filing: Seres Therapeutics, Inc. is offering common stock and preferred stock and debt securities with an aggregate value of up to $250,000,000 from time to time in one or more offerings.

92M 0
Nov 10, 2021

10-Q filing | 91.8M shares outstanding

92M 0
Aug 03, 2021

10-Q filing | 91.7M shares outstanding

92M 0
May 04, 2021

10-Q filing | 91.6M shares outstanding

92M 0
Mar 02, 2021

10-K filing | 91.5M shares outstanding

92M 0
Nov 09, 2020

10-Q filing | 91.2M shares outstanding

91M 0
Jul 28, 2020

10-Q filing | 76.3M shares outstanding

76M 0
May 07, 2020

10-Q filing | 72.6M shares outstanding

73M 0
Mar 09, 2020

S-3 filing: SERES THERAPEUTICS, INC. is filing an S-3 to offer and sell up to $125,000,000 in the aggregate of Common Stock, Preferred Stock, and Debt Securities.

71M 0
Mar 02, 2020

10-K filing | 71.1M shares outstanding

71M 0
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