David R. Walt - Jun 12, 2025 Form 4 Insider Report for Quanterix Corp (QTRX)

Role: Director
Signature: /s/ Brian Keane, as Attorney-in-Fact
Stock symbol: QTRX
Transactions as of: Jun 12, 2025
Transactions value $: $984,968
Form type: 4
Date filed: 6/13/2025, 04:39 PM
Previous filing: Jun 9, 2025
Next filing: Jul 2, 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
WALT DAVID R	Director	C/O QUANTERIX CORPORATION,, 900 MIDDLESEX TURNPIKE, BILLERICA	/s/ Brian Keane, as Attorney-in-Fact	2025-06-13	0001205236

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	QTRX	Common Stock	Purchase	$224K	+36K	+2.11%	$6.23	1.74M	Jun 12, 2025	Direct	F1, F2
transaction	QTRX	Common Stock	Purchase	$761K	+124K	+7.11%	$6.14	1.87M	Jun 13, 2025	Direct	F2, F3

Showing 1 to 2 of 2 entries

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	This transaction was executed in multiple trades at prices ranging from $6.17 to $6.31. The price reported reflects the weighted average purchase price. The reporting person undertakes to provide upon request to the SEC staff, the issuer or any security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
F2	Includes 7,435 restricted stock units.
F3	This transaction was executed in multiple trades at prices ranging from $5.96 to $6.235 The price reported reflects the weighted average sale price. The reporting person undertakes to provide upon request to the SEC staff, the issuer or any security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.