Quanterix (QTRX) director awarded 4,310 shares for board service

Rhea-AI Filing Summary

Mendel Scott reported acquisition or exercise transactions in this Form 4 filing.

Quanterix Corp director Scott Mendel received a grant of 4,310 shares of common stock as compensation. The shares were granted in lieu of cash fees for his service on the company’s Board of Directors and its committees for the first quarter of 2026. Following this award, he directly holds 12,527 shares.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Mendel Scott

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	4,310	$0.00	--

Holdings After Transaction: Common Stock — 12,527 shares (Direct)

Footnotes (1)

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Key Figures

Shares granted: 4,310 shares Grant price per share: $0.00 per share Shares held after transaction: 12,527 shares +1 more

4 metrics

Shares granted 4,310 shares Common stock grant to director on 2026-04-01

Grant price per share $0.00 per share Stock granted in lieu of cash fees

Shares held after transaction 12,527 shares Director Scott Mendel direct ownership post-grant

Transaction code A Grant, award, or other acquisition of common stock

Key Terms

Form 4, Grant, award, or other acquisition, stock granted in lieu of cash fees, Board of Directors, +1 more

5 terms

Form 4 regulatory

"INSIDER FILING DATA (Form 4):"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

Grant, award, or other acquisition financial

"transaction_code_description": "Grant, award, or other acquisition""

stock granted in lieu of cash fees financial

"Consists of stock granted in lieu of cash fees for service"

Board of Directors financial

"for service on the Company's Board of Directors and committees"

The Board of Directors is a group of people chosen by a company's owners to help make big decisions and oversee how the company is run. They act like a team of advisors or managers, making sure the company stays on track and meets its goals. Their choices can influence the company's success and how it grows.

non-derivative financial

""transaction_type": "non-derivative""

Form 4 Insider Transactions: What Each Field Means →

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

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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

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

1. Name and Address of Reporting Person^*

Mendel Scott

(Last) (First) (Middle)

C/O QUANTERIX CORPORATION

900 MIDDLESEX TURNPIKE

(Street)

BILLERICA MASSACHUSETTS 01821

(City) (State) (Zip)

UNITED STATES

(Country)

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)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/01/2026

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

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

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

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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	04/01/2026		A		4,310(1)	A	$0.00	12,527	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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Consists of stock granted in lieu of cash fees for service on the Company's Board of Directors and committees thereof for the first quarter of 2026.

Remarks:

	/s/ Bonnie McManus, Attorney-in-Fact	04/03/2026
	** 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 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.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did Quanterix (QTRX) report for Scott Mendel?

Quanterix reported that director Scott Mendel received a grant of 4,310 shares of common stock. The award was issued at no cash cost per share and represents stock-based compensation for serving on the Board of Directors and its committees during the first quarter of 2026.

How many Quanterix (QTRX) shares does Scott Mendel hold after this Form 4?

After the reported grant, Scott Mendel directly holds 12,527 shares of Quanterix common stock. This reflects his new total ownership position following the 4,310-share award that was granted in lieu of cash fees for first-quarter 2026 board and committee service.

What does the transaction code "A" mean in the Quanterix (QTRX) Form 4?

The transaction code "A" indicates a grant, award, or other acquisition of shares rather than an open-market purchase. For Quanterix, it reflects 4,310 shares of common stock granted to director Scott Mendel as stock-based compensation for his first-quarter 2026 board-related service.

Was Scott Mendel’s Quanterix (QTRX) share grant an open-market purchase?

No, the 4,310-share transaction was not an open-market purchase. It is classified as a grant or award with a per-share price of $0.00, issued in lieu of cash fees for Scott Mendel’s service on Quanterix’s Board of Directors and its committees for early 2026.

Why did Quanterix (QTRX) grant stock to Scott Mendel instead of cash?

The filing explains that the shares consist of stock granted in lieu of cash fees. This means Quanterix compensated director Scott Mendel for his first-quarter 2026 Board and committee service by issuing 4,310 shares of common stock rather than paying equivalent cash director fees.