Quanterix grants CCO 260K RSUs over four years

Quanterix granted its Chief Commercial Officer a multi-year RSU award that vests over four years, aligning compensation with continued service.

Available on EDGAR 09/17/2026 - 05:04 PM EDT Accepted by SEC EDGAR 09/17/2026 - 05:03 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Quanterix Corp (QTRX) reported that Chief Commercial Officer James Edward Gute Jr. received a grant of 260,315 restricted stock units (RSUs) on September 15, 2026. The RSUs convert into common stock and vest in four equal annual installments on each of the first four anniversaries of the grant date, contingent on his continued employment. Following this award, he holds 260,315 RSUs directly.

Insider Trade Summary

Grant/Award: 260,315 shares

Grant/Award 1 txn

Insider Gute James Edward Jr.

Role Chief Commercial Officer

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Unit F1	260,315	$0.00	$0.00

Holdings After Transaction: Restricted Stock Unit — 260,315 contracts (Direct)

Holdings Before and After: Restricted Stock Unit, 0 to 260,315 contracts (Direct)

Footnotes (1)

1. F1. On September 15, 2026, the reporting person was granted 260,315 restricted stock units. The RSUs vest in four equal annual installments on the first four anniversaries of the grant date, subject to the reporting person's continued employment with the issuer or one of its subsidiaries through the vesting dates.

Key Figures

Restricted stock units granted: 260,315 RSUs Transaction price per RSU: $0.00 per unit Underlying common shares: 260,315 shares of common stock +2 more

5 metrics

Restricted stock units granted 260,315 RSUs Equity grant to Chief Commercial Officer on September 15, 2026

Transaction price per RSU $0.00 per unit Compensation grant, not a market purchase

Underlying common shares 260,315 shares of common stock Underlying security for the granted RSUs

Vesting schedule length 4 years Four equal annual installments on anniversaries of the grant date

RSUs held after grant 260,315 RSUs Direct holdings reported following the September 15, 2026 award

Key Terms

Restricted Stock Unit, vest, underlying security

3 terms

Restricted Stock Unit financial

"the reporting person was granted 260,315 restricted stock units"

A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.

vest financial

"The RSUs vest in four equal annual installments"

A vest is the process by which an employee earns the right to receive certain benefits or ownership interests, such as stock or retirement funds, over time. It’s similar to earning a reward gradually, ensuring that the benefit becomes fully yours only after a set period or meeting specific conditions. This makes it important for investors because it determines when they can actually claim or use those benefits.

underlying security financial

"underlying security title: Common Stock"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What equity award did Quanterix (QTRX) grant to its Chief Commercial Officer?

Quanterix granted Chief Commercial Officer James Edward Gute Jr. 260,315 restricted stock units (RSUs) on September 15, 2026. These RSUs are a form of equity compensation that can settle in shares of the company’s common stock upon vesting.

How do the new RSUs for Quanterix’s CCO vest?

The 260,315 RSUs granted to Quanterix’s Chief Commercial Officer vest in four equal annual installments on the first four anniversaries of the September 15, 2026 grant date, subject to his continued employment with Quanterix or one of its subsidiaries through each vesting date.

What is the reported price per RSU in the Quanterix (QTRX) Form 4 filing?

The Form 4 reports a transaction price of $0.00 per restricted stock unit, reflecting that this is a compensation grant rather than a market purchase. The award represents an acquisition of derivative securities at no cash cost to the reporting person.

How many Quanterix RSUs does the reporting person hold after this transaction?

After the September 15, 2026 grant, Chief Commercial Officer James Edward Gute Jr. is reported to hold 260,315 restricted stock units directly. These RSUs are tied to Quanterix common stock and will vest over a four-year period if employment conditions are met.

Was the Quanterix CCO’s RSU grant made under a Rule 10b5-1 trading plan?

The Form 4 indicates that the Rule 10b5-1 checkbox is not affirmed for this filing. The related footnote describes the RSU grant and vesting schedule but does not state that it was made under a Rule 10b5-1 trading plan.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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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^*

Gute James Edward Jr.

(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)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/15/2026

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

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
Restricted Stock Unit	$0.00	09/15/2026		A		260,315		(1)	(1)	Common Stock	260,315	$0.00	260,315	D

Explanation of Responses:

1. On September 15, 2026, the reporting person was granted 260,315 restricted stock units. The RSUs vest in four equal annual installments on the first four anniversaries of the grant date, subject to the reporting person's continued employment with the issuer or one of its subsidiaries through the vesting dates.

Remarks:

	/s/ Michael Lanieri, Attorney-in-Fact	09/17/2026
	** 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)