SEC Filing | Quanterix

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SEC FORM 4 SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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

OMB APPROVAL

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person^*

DONNELLY WILLIAM P

(Last)

(First)

(Middle)

C/O QUANTERIX CORPORATION

900 MIDDLESEX TURNPIKE

(Street)

BILLERICA

01821

(City)

(State)

(Zip)

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

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

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

3. Date of Earliest Transaction (Month/Day/Year)
08/17/2023

4. 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

Rule 10b5-1(c) Transaction Indication

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	08/17/2023		A		8,238⁽¹⁾	A	$0.00	8,238⁽²⁾	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Stock Option (right to buy)	$23.9	08/17/2023		A		12,356		⁽³⁾	08/17/2033	Common Stock	12,356	$0.00	12,356	D

Explanation of Responses:

1. Represents shares of stock issuable on vesting of restricted stock units. The restricted stock units vest as to one-third of shares on each of August 17, 2024, August 17, 2025 and August 17, 2026.

2. Includes 8,238 restricted stock units.

3. The option vests as to one-third of the shares on August 17, 2024, and the remaining two-thirds of the shares vest monthly thereafter over two years in 24 successive equal installments.

Remarks:

	/s/ Bonnie McManus, as Attorney-in-Fact	08/21/2023
	** 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 4 (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.

POWER OF ATTORNEY

	Know all by these presents that the undersigned hereby
constitutes and appoints each of Laurie Churchill, Brian Keane, Ian
Macdonald and Bonnie McManus as the undersigned's true and lawful
attorney-in-fact to:
(1)	execute for and on behalf of the undersigned, in the
undersigned's capacity as a beneficial owner of Quanterix
Corporation (the "Company"), Forms 3, 4, and 5 in accordance
with Section 16(a) of the Securities Exchange Act of 1934 and
the rules thereunder and Schedules 13D and 13G in accordance
with Section 13 of the Securities Exchange Act of 1934 and the
rules thereunder;
(2)	do and perform any and all acts for and on behalf of the
undersigned which may be necessary or desirable to complete and
execute any such Form 3, 4, or 5 or Schedules 13D or 13G,
complete and execute any amendment or amendments thereto, and
timely file such form with the U.S. Securities and Exchange
Commission (the "SEC") and any securities exchange or similar
authority; and
(3)	take any other action of any type whatsoever in connection with
the foregoing which, in the opinion of such attorney-in-fact,
may be of benefit to, in the best interest of, or legally
required by, the undersigned, it being understood that the
documents executed by such attorney-in-fact on behalf of the
undersigned pursuant to this Power of Attorney shall be in such
form and shall contain such terms and conditions as such
attorney-in-fact may approve in such attorney-in-fact's
discretion.
	The undersigned hereby grants to each attorney-in-fact full
power and authority to do and perform any and every act and thing
whatsoever requisite, necessary, or proper to be done in the exercise
of any of the rights and powers herein granted, as fully to all
intents and purposes as the undersigned might or could do if
personally present, with full power of substitution or revocation,
hereby ratifying and confirming all that such attorney-in-fact, or
such attorney-in-fact's substitute or substitutes, shall lawfully do
or cause to be done by virtue of this power of attorney and the
rights and powers herein granted. The undersigned also ratifies
hereby any action previously taken by each attorney-in-fact that
would have been authorized by this power of attorney if it has been
in effect at the time such action was taken. The undersigned
acknowledges that each foregoing attorney-in-fact, in serving in such
capacity at the request of the undersigned, is not assuming, nor is
the Company assuming, any of the undersigned's responsibilities to
comply with Sections 13 and 16 of the Securities Exchange Act of
1934.
	This Power of Attorney shall remain in full force and effect
until the undersigned is no longer required to file Forms 3, 4, and 5
and Schedules 13D and 13G with respect to the undersigned's holdings
of and transactions in securities issued by the Company, unless
earlier revoked by the undersigned in a signed writing delivered to
each foregoing attorney-in-fact.



	IN WITNESS WHEREOF, the undersigned has caused this Power of
Attorney to be executed as of this 20th day of August, 2023.



/s/ William P. Donnelly


William P. Donnelly