# EDGAR Filing Document

**Accession Number:** 0001033876
**File Stem:** 0001562180-23-000097
**Filing Date:** 2023-1
**Character Count:** 6696
**Document Hash:** 159a3d40c08e37061b0c0f20b2cf812f
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001562180-23-000097.hdr.sgml**: 20230104

**ACCESSION NUMBER**: 0001562180-23-000097

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20230103

**FILED AS OF DATE**: 20230104

**DATE AS OF CHANGE**: 20230104

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** MEISTER PAUL M
- **CENTRAL INDEX KEY:** 0001033876

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-38319
- **FILM NUMBER:** 23506188

**MAIL ADDRESS:**
- **STREET 1:** 18 SHIP ROCK ROAD
- **CITY:** NORTH HAMPTON
- **STATE:** NH
- **ZIP:** 03862

**FORMER NAME:**
- **FORMER CONFORMED NAME:** Meister Paul M.
- **DATE OF NAME CHANGE:** 20150730

**FORMER NAME:**
- **FORMER CONFORMED NAME:** MEISTER PAUL M
- **DATE OF NAME CHANGE:** 19970215
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Quanterix Corp
- **CENTRAL INDEX KEY:** 0001503274
- **STANDARD INDUSTRIAL CLASSIFICATION:** LABORATORY ANALYTICAL INSTRUMENTS [3826]
- **IRS NUMBER:** 208957988
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 900 MIDDLESEX TURNPIKE
- **CITY:** BILLERICA
- **STATE:** MA
- **ZIP:** 01821
- **BUSINESS PHONE:** 617-301-9400

**MAIL ADDRESS:**
- **STREET 1:** 900 MIDDLESEX TURNPIKE
- **CITY:** BILLERICA
- **STATE:** MA
- **ZIP:** 01821

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

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] 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**<sup>*</sup><br>MEISTER PAUL M<br><sub>(Last) (First) (Middle)</sub><br>C/O QUANTERIX CORPORATION,<br>900 MIDDLESEX TURNPIKE<br><sub>(Street)</sub><br>BILLERICA, MA 01821<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2023-01-03 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [ ] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Quanterix Corp [ QTRX ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Common Stock | 2023-01-03 |  | A |  | 8083.00<sup>(1)</sup> | A | $0.00 | 262125.00<sup>(2)</sup> | D |  |
| Common Stock | 2023-01-03 |  | A |  | 1166.00<sup>(3)</sup> | A | 12.86<sup>(4)</sup> | 263291.00<sup>(2)</sup> | D |  |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| Stock Option (Right to Buy) | $12.86 | 2023-01-03 |  | A |  | 12124.00<sup>(5)</sup> |  | 2023-12-31 | 2033-01-03 | Common Stock | 12124.00 | $0.00 | 12124.00 | D |  |

---

### Footnotes:

(1) Represents restricted stock units that vest as to 100% of the shares on December 31, 2023 granted pursuant to the Quanterix Corporation Amended and Restated 2018 Non-Employee Director Compensation Policy. Each restricted stock unit represents the right to receive one share of the Issuer's common stock.

(2) Includes 8,083 restricted stock units.

(3) Consists of stock granted in lieu of cash fees for service on the Company's Board of Directors and committees thereof for the fourth quarter of 2022.

(4) Closing price of the Company's common stock on the Nasdaq Global Market on January 3, 2023.

(5) Represents non-qualified stock option to purchase 12,124 shares of common stock granted pursuant to the Quanterix Corporation Amended and Restated 2018 Non-Employee Director Compensation Policy.

**Signature:** /s/ Brian Keane, Attorney-in-fact  
**Date:** 2023-01-04

### Remarks:

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.**