Quanterix Corp — Director's Dealing 2021

May 6, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Quanterix Corp (QTRX)
CIK: 0001503274
Period of Report: 2021-05-03

Reporting Person: Roskey Mark T. (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-05-03	Common Stock	S	75.00	$57.2471	Disposed	24361.00	Direct
2021-05-03	Common Stock	S	58.00	$58.1591	Disposed	24303.00	Direct
2021-05-03	Common Stock	S	9.00	$59.0129	Disposed	24294.00	Direct
2021-05-03	Common Stock	S	5.00	$61.36	Disposed	24289.00	Direct

Footnotes

F1: The sales of shares reported on this Form 4 were made solely to cover tax obligations upon the vesting of 472 RSUs.

F2: This transaction was executed in multiple trades at prices ranging from $56.67 to $57.63. 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.

F3: Includes 14,237 restricted stock units.

F4: This transaction was executed in multiple trades at prices ranging from $58.75 to $59.45. 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.

F5: This transaction was executed in multiple trades at prices ranging from $57.67 to $58.64. 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.