SCHEDULE 13G/A: Portolan Capital Management and George McCabe Disclose 7.64% Passive Stake in Quanterix Corp

Portolan Capital Management, LLC and its manager George McCabe have reported a beneficial ownership of 7.64% of Quanterix Corp's common stock as of March 31, 2025, held for investment purposes.

Summary

• Portolan Capital Management, LLC and George McCabe collectively beneficially own 2,963,397 shares of Quanterix Corp's Common Stock.
• This ownership represents 7.64% of the total outstanding class of Quanterix Corp's Common Stock.
• The shares are held with sole voting power and sole dispositive power by the reporting persons.
• The filing explicitly states that the securities were not acquired and are not held for the purpose of changing or influencing the control of Quanterix Corp.

Sentiment

Score: 5

Explanation: The document is a factual report of beneficial ownership and does not contain information that would indicate a positive or negative sentiment regarding the issuer's performance or outlook.

Positives

• The reporting persons, Portolan Capital Management, LLC and George McCabe, certify that their acquisition and holding of Quanterix Corp securities are not for the purpose of changing or influencing control of the issuer, indicating a passive investment stance.

Risks

• The document certifies that the securities were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer, thereby mitigating the risk of activist investor intervention.

Future Outlook

The document is a beneficial ownership report and does not contain any forward-looking statements or guidance regarding the issuer's future outlook.

Industry Context

This filing is a routine disclosure of a significant passive ownership stake by an investment adviser and its manager in a publicly traded company. It does not provide broader industry trends or competitive analysis.

Stakeholder Impact

• Shareholders: Provides transparency regarding significant ownership stakes held by institutional investors, which can influence market perception and trading activity.

Key Dates

Keywords

Quanterix Corp, Portolan Capital Management, George McCabe, Schedule 13G, beneficial ownership, common stock, investment adviser, SEC filing, passive investment