NASDAQ:RPID

Rapid Micro Biosystems Stock Insider Trading

Healthcare > Medical - Devices

Buy RPID

*Your capital is at risk

$1.96

+0 (+0%)

At Close: Jun 03, 2026

Rapid Micro Biosystems Stock Insider Power

Based on the 100 latest insides trades, we have calculated the insider power to be positive at 61.40. In total, the insiders bought 7.53M and sold 567.97K RPID shares in the last 100 trades. The insider score can be negative despite buy/sell ratio being positive. The score focuses on the quality of the trades.

Insider Power (Last 100 transactions)	61.40
● Buy	7.53M shares
● Sell	567.97K shares
72% Buy Activity Weak Negative Correlation
Buy Signal Medium Confidence May 20, 2026 Analysis Breakdown: Strongly supported by a very high Insider Power Score of 61.4. Confidence increased due to high data reliability score of 100.

Historical Insider Trades

Date	Type	Person	Role	Amount
May 29, 2026 Buy	Series B Warrant (right to buy) A-Award	Spignesi Robert G. Jr. President And CEO	CEO / President	12 787 Value: $29.9K
May 29, 2026 Buy	Series A Warrant (right to buy) A-Award	Spignesi Robert G. Jr. President And CEO	CEO / President	12 787 Value: $25.0K
May 29, 2026 Buy	Class A Common Stock A-Award	Spignesi Robert G. Jr. President And CEO	CEO / President	12 787 Value: $25.0K
May 29, 2026 Buy	Series B Warrant (right to buy) A-Award	Wirtjes Sean M Chief Financial Officer	C-Suite Officer	12 787 Value: $29.9K
May 29, 2026 Buy	Series A Warrant (right to buy) A-Award	Malloy Kirk Director	Director	12 787 Value: $25.0K
May 29, 2026 Buy	Class A Common Stock A-Award	Malloy Kirk Director	Director	12 787 Value: $25.0K
May 29, 2026 Buy	Series B Warrant (right to buy) A-Award	Pei Melinda Litherland Director	Director	12 787 Value: $29.9K
May 29, 2026 Buy	Series A Warrant (right to buy) A-Award	Pei Melinda Litherland Director	Director	12 787 Value: $25.0K
May 29, 2026 Buy	Class A Common Stock A-Award	Pei Melinda Litherland Director	Director	12 787 Value: $25.0K
May 29, 2026 Buy	Series B Warrant (right to buy) A-Award	Lowenstein Inese Director	Director	12 787 Value: $29.9K
May 29, 2026 Buy	Class A Common Stock A-Award	Lowenstein Inese Director	Director	12 787 Value: $25.0K
May 29, 2026 Buy	Series A Warrant (right to buy) A-Award	Lowenstein Inese Director	Director	12 787 Value: $25.0K
May 29, 2026 Buy	Series B Warrant (right to buy) A-Award	Malloy Kirk Director	Director	12 787 Value: $29.9K
May 29, 2026 Buy	Class A Common Stock A-Award	Wirtjes Sean M Chief Financial Officer	C-Suite Officer	12 787 Value: $25.0K
May 29, 2026 Buy	Series A Warrant (right to buy) A-Award	Wirtjes Sean M Chief Financial Officer	C-Suite Officer	12 787 Value: $25.0K
May 21, 2026 Buy	Stock Option (Right to Buy) A-Award	Pei Melinda Litherland Director	Director	38 700 Value: $80.1K
May 21, 2026 Buy	Class A Common Stock A-Award	Pei Melinda Litherland Director	Director	19 300 Value: $40.0K
May 21, 2026 Buy	Stock Option (Right to Buy) A-Award	Lowenstein Inese Director	Director	38 700 Value: $80.1K
May 21, 2026 Buy	Class A Common Stock A-Award	Malloy Kirk Director	Director	19 300 Value: $40.0K
May 21, 2026 Buy	Stock Option (Right to Buy) A-Award	Malloy Kirk Director	Director	38 700 Value: $80.1K
May 21, 2026 Buy	Class A Common Stock A-Award	Lowenstein Inese Director	Director	19 300 Value: $40.0K
May 21, 2026 Buy	Class A Common Stock A-Award	Kollender Richard S Director	Director	19 300 Value: $40.0K
May 21, 2026 Buy	Stock Option (Right to Buy) A-Award	Kollender Richard S Director	Director	38 700 Value: $80.1K
May 21, 2026 Buy	Stock Option (Right to Buy) A-Award	Bika Dafni Director	Director	38 700 Value: $80.1K
May 21, 2026 Buy	Class A Common Stock A-Award	Bika Dafni Director	Director	19 300 Value: $40.0K

About Insider Power

Insider Power is a proprietary algorithm developed by StockInvest.us to evaluate the significance of insider transactions. The calculation considers the size, type, and timing of transactions, as well as the insider’s role within the company.

It is important to note that, in general, there is little to no correlation between insider transactions and short-term stock price movements. In one of our studies, only 0.22%^* of stocks with insider activity showed a measurable correlation — and even then, it was unclear whether the effect was caused by insider actions or simply by the stock’s broader trend.

While our algorithms are designed to highlight potentially meaningful signals, these cannot be regarded as statistically significant on their own. Insider trading activity should therefore be seen as informative rather than as direct trading guidance. The Insider Power metric was created to present this information in a clearer and more accessible way, helping investors better understand the possible context of insider activity.

* October 6th, 2025 - Tested on 5562 stocks

ABOUT RAPID MICRO BIOSYSTEMS, INC.

Rapid Micro Biosystems, Inc., a life sciences technology company, provides products for the detection of microbial contamination in the manufacture of pharmaceutical, medical devices, and personal care products in North America, Europe, and Asia. The company offers Growth Direct platform, which includes Growth Direct system, proprietary consumables, lab information management system connection software, and comprehensive customer support and vali...

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