SC 13G: Quanterix Corp

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SC 13G filing by Quanterix Corp.

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Risk Level: low

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Filing Documents

• tm2418374d1_sc13g.htm (SC 13G) — 64KB
• 0001104659-24-075595.txt ( ) — 65KB

From the Filing

SC 13G 1 tm2418374d1_sc13g.htm SC 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d –1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d–2. (Amendment No. )* Quanterix Corporation (Name of Issuer) Common Stock (Title of Class of Securities) 74766Q101 (CUSIP Number) June 17, 2024 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is filed: Rule 13d-1(b) Rule 13d-1(c) o Rule 13d-1(d) *The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page. The information required in the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise CUSIP No. 74766Q101 1. Names of Reporting Persons Portolan Capital Management, LLC 2. Check the Appropriate Box if a Member of a Group (See Instructions) (a) ¨ (b) ¨ 3. SEC Use Only 4 Citizenship or Place of Organization Delaware Number of Shares Beneficially Owned by Each Reporting Person With 5. Sole Voting Power 1,918,030 6. Shared Voting Power 7. Sole Dispositive Power 1,918,030 8. Shared Dispositive Power 9. Aggregate Amount Beneficially Owned by Each Reporting Person 1,918,030 10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ¨ 11. Percent of Class Represented by Amount in Row (9) 5.01% 12. Type of Reporting Person (See Instructions) IA CUSIP No. 74766Q101 1. Names of Reporting Persons George McCabe 2. Check the Appropriate Box if a Member of a Group (See Instructions) (a) o (b) o 3. SEC Use Only 4 Citizenship or Place of Organization USA Number of Shares Beneficially Owned by Each Reporting Person With 5. Sole Voting Power 1,918,030 6. Shared Voting Power 7. Sole Dispositive Power 1,918,030 8. Shared Dispositive Power 9. Aggregate Amount Beneficially Owned by Each Reporting Person 1,918,030 10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) o 11. Percent of Class Represented by Amount in Row (9) 5.01% 12. Type of Reporting Person (See Instructions) IN 2 Item 1. (a) Name of Issuer Quanterix Corporation (b) 900 Middlesex Turnpike Billerica, Massachusetts 01821 Item 2. (a) Name of Person Filing This statement is being filed with respect to the shares of class A common stock (“Common Stock”) of the Issuer beneficially owned (1) directly by Portolan Capital Management, LLC, a registered investment adviser, in its capacity as investment manager for various clients, and (2) indirectly by George McCabe, the Manager of Portolan Capital Management, LLC. Portolan Capital Management, LLC and Mr. McCabe are sometimes individually referred to herein as a “Reporting Person” and collectively as the “Reporting Persons.” (b) Address of Principal Business Office or, if none, Residence Portolan Capital Management, LLC and George McCabe 2 International Place, FL 26, Boston, MA 02110 (c) Citizenship Portolan Capital Management, LLC – DE Mr. McCabe – USA (d) Title of Class of Securities Common Stock (e) CUSIP Number 74766Q101 Item 3. If this statement is filed pursuant to §§240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a: (a) Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o). (b) Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c). (c) Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c). (d) Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8). (e) An investment adviser in accordance with §240.13d-1(b)(1)(ii)(E); (f) An employee benefit plan or endowment fund in accordance with §240.13d-1(b)(1)(ii)(F); (g) A parent holding company or control person in accordance with §240.13d-1(b)(1)(ii)(G); (h) A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813); (i) A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3); (j) A non-U.S. institution in accordance with § 240.13d–1(b)(1)(ii)(J); (k) Group, in accordance with §240.13d-1(b)(1)(ii)(J). 3 Item 4. Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer id

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