SCHEDULE 13G/A: Ameriprise Financial and Affiliates Disclose Significant Passive Stake in Quanterix Corp

Ameriprise Financial, Inc. and its affiliated entities have filed an amended Schedule 13G, disclosing a combined beneficial ownership of 10.7% of Quanterix Corp's common stock as of April 30, 2025.

Summary

• Ameriprise Financial, Inc. (AFI) and its subsidiaries, including several Threadneedle entities, have filed an Amendment No. 2 to Schedule 13G regarding their beneficial ownership in Quanterix Corp.
• As of April 30, 2025, Ameriprise Financial, Inc. beneficially owns 4,159,974 shares of Quanterix Corp common stock, representing 10.7% of the class.
• Several UK-based Threadneedle entities, which are subsidiaries of Ameriprise Financial, Inc., each report beneficial ownership of 3,057,067 shares, or 7.9% of the class, with shared voting and dispositive power.
• The filing states that the securities were acquired and are held in the ordinary course of business and not for the purpose of changing or influencing the control of Quanterix Corp.

Sentiment

Score: 5

Explanation: The document is a standard regulatory filing (Schedule 13G) disclosing beneficial ownership. It does not contain information that would inherently convey positive or negative sentiment regarding the issuer's performance or future prospects.

Positives

• Significant institutional investment from Ameriprise Financial, Inc. and its affiliates, indicating confidence in Quanterix Corp.
• The investment is stated to be for ordinary course of business, suggesting a long-term, passive holding rather than an activist stance.

Future Outlook

NA

Industry Context

NA

Stakeholder Impact

• Shareholders: Provides transparency regarding significant institutional ownership, which can be viewed positively as it indicates institutional confidence and liquidity.
• Management: Awareness of significant passive institutional holders.

Key Dates

Keywords

Quanterix Corp, Ameriprise Financial, Threadneedle, SEC Filing, Schedule 13G, Beneficial Ownership, Common Stock, Institutional Investment, Passive Stake