RAPID MICRO BIOSYSTEMS, INC. (RPID) - Dilution Analysis

Visualizing historical and potential share dilution over time

Dilution Analysis

Medium Risk
Moderate dilution risk
Last updated: May 19, 2026

Risk Assessment Details

Potential Dilution: 20.76% of current shares
Recent Dilution: 19.67% (2 years)
Historical Dilution Factor: moderate recent dilution
Outstanding Shares
45M
Potential Supply
9.4M
Additional shares possible
Splits
None
Past 2 years

Summary

RPID currently has 45.4M outstanding shares. with moderate dilution risk from 9.43M authorized shares representing 20.8% potential dilution. The company has diluted shareholders by 19.67% over the past 2 years through share issuances.

Share Structure Timeline

Outstanding Shares
Total Supply

Historical Data Points

Date Event Outstanding Supply
May 19, 2026

8-K filing: Rapid Micro Biosystems, Inc. entered into an underwriting agreement and a securities purchase agreement to issue and sell shares of common stock and warrants in a public offering and a concurrent registered direct offering. ($0.14M proceeds)

45M 9.4M
May 15, 2026

10-Q filing | 45.4M shares outstanding

45M 9.4M
Mar 12, 2026

10-K filing | 44.7M shares outstanding

45M 9.4M
Nov 07, 2025

10-Q filing | 39.8M shares outstanding

40M 9.4M
Aug 12, 2025

8-K filing: Rapid Micro Biosystems, Inc. issued warrants to purchase up to 179,104 shares of Common Stock at an exercise price of $3.35 per share in connection with a loan agreement.

39M 9.4M
May 09, 2025

10-Q filing | 39.3M shares outstanding

39M 9.4M
Feb 28, 2025

10-K filing | 38.7M shares outstanding

39M 9.4M
Nov 07, 2024

10-Q filing | 37.7M shares outstanding

38M 9.4M
Aug 02, 2024

10-Q filing | 37.6M shares outstanding

38M 9.4M
May 03, 2024

10-Q filing | 37.6M shares outstanding

38M 9.4M
Mar 01, 2024

10-K filing | 37.2M shares outstanding

37M 9.4M
Dec 15, 2023

S-3 filing: The company is filing an S-3 to offer up to $200,000,000 in aggregate principal amount of Class A common stock, preferred stock, debt securities, warrants and/or units, in any combination and also offering Class A common stock through an at-the-market offering.

42M 9.4M
Nov 03, 2023

10-Q filing | 37.1M shares outstanding

37M 0
Aug 04, 2023

10-Q filing | 37.0M shares outstanding

37M 0
May 09, 2023

10-Q filing | 36.8M shares outstanding

37M 0
Mar 10, 2023

10-K filing | 36.6M shares outstanding

37M 0
Nov 10, 2022

10-Q filing | 36.4M shares outstanding

36M 0
Aug 12, 2022

10-Q filing | 36.4M shares outstanding

36M 0
May 10, 2022

10-Q filing | 36.4M shares outstanding

36M 0
Mar 24, 2022

10-K filing | 34.6M shares outstanding

35M 0
Nov 15, 2021

10-Q filing | 35.3M shares outstanding

35M 0
Aug 27, 2021

10-Q filing | 1.0M shares outstanding

970K 0
Jul 12, 2021

S-1/A filing: An S-1/A filing indicating the total shares of common stock to be outstanding after this offering will be 38,670,611 shares (or 39,660,611 shares if the underwriters exercise their option to purchase additional shares of Class A common stock in full).

39M 0
Jun 25, 2021

S-1 filing: This S-1 filing describes a warrant to purchase shares of Series C1 Preferred Stock of Rapid Micro Biosystems, Inc., with an exercise price of $1.15 per share and expiring on May 14, 2027.

N/A 0
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