Quanterix (QTRX) CEO Everett Cunningham reports no share ownership on Form 3

Rhea-AI Filing Summary

Quanterix Corp filed an initial ownership report for Everett Cunningham, who serves as President, CEO, and a director of the company. This Form 3 indicates that, as of the event date of 01/19/2026, he reports no securities beneficially owned in Quanterix. Both the non-derivative and derivative security tables show no holdings, and the remarks section explicitly states that no securities are beneficially owned.

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

Cunningham Everett

(Last) (First) (Middle)

C/O QUANTERIX CORPORATION

900 MIDDLESEX TURNPIKE

(Street)

BILLERICA MA 01821

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
01/19/2026

3. Issuer Name and Ticker or Trading Symbol
Quanterix Corp [ QTRX ]

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President and CEO

5. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks:

No securities are beneficially owned.

	/s/ Daniel Char, Attorney-in-Fact	01/20/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

Who is the reporting person in Quanterix Corp (QTRX) Form 3?

The reporting person is Everett Cunningham, who is identified as a director and as the company’s President and CEO.

What does Quanterix Corp (QTRX) Form 3 say about Everett Cunningham’s share ownership?

The Form 3 states in the remarks section that no securities are beneficially owned by Everett Cunningham as of the reported event date.

Does Everett Cunningham hold any derivative securities of Quanterix Corp (QTRX)?

No. The section for Derivative Securities Beneficially Owned contains no entries, and the remarks confirm that no securities are beneficially owned.

What roles does Everett Cunningham hold at Quanterix Corp (QTRX)?

He is listed as both a Director and an Officer, with the officer title specified as President and CEO.

Is this Quanterix Corp (QTRX) ownership report filed by more than one reporting person?

No. The filing box for Form filed by One Reporting Person is checked, indicating it covers only Everett Cunningham.

What is the event date for Everett Cunningham’s Form 3 at Quanterix Corp (QTRX)?

The Date of Event Requiring Statement is listed as 01/19/2026.