QTRX

SEC source: 0001562180-21-000756 · primarydocument.xml · nonDerivative · entry 4

HRUSOVSKY E KEVIN · CIK 0001252546 · Director · Chairman, President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 998,139

F5 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan adopted on December 14, 2020.

F7 · price: This transaction was executed in multiple trades at prices ranging from $65.49 to $66.32. 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 · balance_after: Includes 128,271 restricted stock units and 39,815 shares of common stock that are subject to performance based vesting.

SEC source: 0001562180-21-000756 · primarydocument.xml · nonDerivative · entry 3

HRUSOVSKY E KEVIN · CIK 0001252546 · Director · Chairman, President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,001,839

F5 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan adopted on December 14, 2020.

F6 · price: This transaction was executed in multiple trades at prices ranging from $64.22 to $64.96. 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 · balance_after: Includes 128,271 restricted stock units and 39,815 shares of common stock that are subject to performance based vesting.

SEC source: 0001562180-21-000756 · primarydocument.xml · nonDerivative · entry 2

HRUSOVSKY E KEVIN · CIK 0001252546 · Director · Chairman, President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,002,539

F1 · shares: The sales of shares reported on this Form 4 were made solely to cover tax obligations upon the vesting of 7,123 RSUs.

F4 · price: This transaction was executed in multiple trades at prices ranging from $68.27 to $68.63. 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 · balance_after: Includes 128,271 restricted stock units and 39,815 shares of common stock that are subject to performance based vesting.

SEC source: 0001562180-21-000756 · primarydocument.xml · nonDerivative · entry 1

HRUSOVSKY E KEVIN · CIK 0001252546 · Director · Chairman, President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,004,429

F1 · shares: The sales of shares reported on this Form 4 were made solely to cover tax obligations upon the vesting of 7,123 RSUs.

F2 · price: This transaction was executed in multiple trades at prices ranging from $67.25 to $68.23. 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 · balance_after: Includes 128,271 restricted stock units and 39,815 shares of common stock that are subject to performance based vesting.

SEC source: 0001562180-21-000762 · primarydocument.xml · nonDerivative · entry 2

Mattoon Dawn · CIK 0001731785 · Sr. VP, Research Products

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 30,834

F1 · shares: The sales of shares reported on this Form 4 were made solely to cover tax obligations upon the vesting of 518 RSUs.

F4 · price: This transaction was executed in multiple trades at prices ranging from $68.27 to $68.63. 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 · balance_after: Includes 19,822 restricted stock units.

SEC source: 0001562180-21-000762 · primarydocument.xml · nonDerivative · entry 1

Mattoon Dawn · CIK 0001731785 · Sr. VP, Research Products

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 30,940

F1 · shares: The sales of shares reported on this Form 4 were made solely to cover tax obligations upon the vesting of 518 RSUs.

F2 · price: This transaction was executed in multiple trades at prices ranging from $67.25 to $68.23. 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 · balance_after: Includes 19,822 restricted stock units.

SEC source: 0001562180-21-000755 · primarydocument.xml · nonDerivative · entry 2

Chaubal Amol · CIK 0001773089 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 25,367

F1 · shares: The sales of shares reported on this Form 4 were made solely to cover tax obligations upon the vesting of 380 RSUs.

F4 · price: This transaction was executed in multiple trades at prices ranging from $68.27 to $68.63. 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 · balance_after: Includes 19,181 restricted stock units.

SEC source: 0001562180-21-000755 · primarydocument.xml · nonDerivative · entry 1

Chaubal Amol · CIK 0001773089 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 25,444

F1 · shares: The sales of shares reported on this Form 4 were made solely to cover tax obligations upon the vesting of 380 RSUs.

F2 · price: This transaction was executed in multiple trades at prices ranging from $67.25 to $68.23. 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 · balance_after: Includes 19,181 restricted stock units.

SEC source: 0001562180-21-000753 · primarydocument.xml · nonDerivative · entry 2

Roskey Mark T. · CIK 0001724565 · SVP, Commercial & Accelerator

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,732

F1 · shares: The sales of shares reported on this Form 4 were made solely to cover tax obligations upon the vesting of 298 RSUs.

F4 · price: This transaction was executed in multiple trades at prices ranging from $68.27 to $68.63. 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 · balance_after: Includes 14,369 restricted stock units.

SEC source: 0001562180-21-000753 · primarydocument.xml · nonDerivative · entry 1

Roskey Mark T. · CIK 0001724565 · SVP, Commercial & Accelerator

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,793

F1 · shares: The sales of shares reported on this Form 4 were made solely to cover tax obligations upon the vesting of 298 RSUs.

F2 · price: This transaction was executed in multiple trades at prices ranging from $67.25 to $68.23. 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 · balance_after: Includes 14,369 restricted stock units.

SEC source: 0001562180-21-000502 · primarydocument.xml · nonDerivative · entry 2

HRUSOVSKY E KEVIN · CIK 0001252546 · Director · Chairman, President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,005,788

F1 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan adopted on December 14, 2020.

F4 · price: This transaction was executed in multiple trades at prices ranging from $78.06 to $78.33. 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 · balance_after: Includes 135,394 restricted stock units and 39,815 shares of common stock that are subject to performance based vesting.

SEC source: 0001562180-21-000502 · primarydocument.xml · nonDerivative · entry 1

HRUSOVSKY E KEVIN · CIK 0001252546 · Director · Chairman, President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,007,288

F1 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan adopted on December 14, 2020.

F2 · price: This transaction was executed in multiple trades at prices ranging from $77.06 to $78.02. 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 · balance_after: Includes 135,394 restricted stock units and 39,815 shares of common stock that are subject to performance based vesting.

SEC source: 0001562180-21-000487 · primarydocument.xml · nonDerivative · entry 1

Duffy David C. · CIK 0001724566 · SVP R&D and CTO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 39,473

F1 · shares: The sale of shares reported on this Form 4 was made pursuant to a Rule 10b5-1 trading plan adopted on May 15, 2020.

F2 · balance_after: Includes 11,389 restricted stock units.

SEC source: 0001562180-21-000446 · primarydocument.xml · nonDerivative · entry 3

HRUSOVSKY E KEVIN · CIK 0001252546 · Director · Chairman, President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,010,788

F1 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan adopted on December 14, 2020.

F5 · price: This transaction was executed in multiple trades at prices ranging from $76.11 to $76.68. 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 · balance_after: Includes 135,394 restricted stock units and 39,815 shares of common stock that are subject to performance based vesting.

SEC source: 0001562180-21-000446 · primarydocument.xml · nonDerivative · entry 2

HRUSOVSKY E KEVIN · CIK 0001252546 · Director · Chairman, President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,011,788

F1 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan adopted on December 14, 2020.

F4 · price: This transaction was executed in multiple trades at prices ranging from $74.53 to $75.35. 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 · balance_after: Includes 135,394 restricted stock units and 39,815 shares of common stock that are subject to performance based vesting.

SEC source: 0001562180-21-000446 · primarydocument.xml · nonDerivative · entry 1

HRUSOVSKY E KEVIN · CIK 0001252546 · Director · Chairman, President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,012,738

F1 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan adopted on December 14, 2020.

F2 · price: This transaction was executed in multiple trades at prices ranging from $73.47 to $74.30. 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 · balance_after: Includes 135,394 restricted stock units and 39,815 shares of common stock that are subject to performance based vesting.

SEC source: 0001562180-21-000339 · primarydocument.xml · derivative · entry 11

DEKKERS MARIJN E · CIK 0001216068 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,951

Underlying: Common Stock · 29,162 shares

Expires 2027-03-31

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F8 · derivative.exercise_date: The option vests as to 25% of the shares on March 13, 2018 and vests as to an additional 2.083% of the shares per month thereafter until February 28, 2021.

SEC source: 0001562180-21-000339 · primarydocument.xml · derivative · entry 10

DEKKERS MARIJN E · CIK 0001216068 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 7,900 shares

Expires 2028-08-07

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001562180-21-000339 · primarydocument.xml · derivative · entry 9

DEKKERS MARIJN E · CIK 0001216068 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 7,900 shares

Expires 2029-01-02

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001562180-21-000339 · primarydocument.xml · nonDerivative · entry 8

DEKKERS MARIJN E · CIK 0001216068 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,080

F1 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan adopted on December 9, 2020.

F6 · price: This transaction was executed in multiple trades at prices ranging from $50.79 to $51.64. 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.

F7 · balance_after: Includes 2,270 restricted stock units.

SEC source: 0001562180-21-000339 · primarydocument.xml · nonDerivative · entry 7

DEKKERS MARIJN E · CIK 0001216068 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,279

F1 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan adopted on December 9, 2020.

F5 · price: This transaction was executed in multiple trades at prices ranging from $49.79 to $50.78. 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.

SEC source: 0001562180-21-000339 · primarydocument.xml · nonDerivative · entry 6

DEKKERS MARIJN E · CIK 0001216068 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,679

F1 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan adopted on December 9, 2020.

F4 · price: This transaction was executed in multiple trades at prices ranging from $48.74 to $49.70. 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.

SEC source: 0001562180-21-000339 · primarydocument.xml · nonDerivative · entry 5

DEKKERS MARIJN E · CIK 0001216068 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 24,012

F1 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan adopted on December 9, 2020.

F3 · price: This transaction was executed in multiple trades at prices ranging from $47.47 to $48.43. 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.

SEC source: 0001562180-21-000339 · primarydocument.xml · nonDerivative · entry 4

DEKKERS MARIJN E · CIK 0001216068 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 46,842

F1 · kind: The sale of shares was effected pursuant to a Rule 10b5-1 trading plan adopted on December 9, 2020.

F2 · price: This transaction was executed in multiple trades at prices ranging from $46.47 to $47.46. 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.

SEC source: 0001562180-21-000339 · primarydocument.xml · nonDerivative · entry 3

DEKKERS MARIJN E · CIK 0001216068 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 54,042

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001562180-21-000339 · primarydocument.xml · nonDerivative · entry 2

DEKKERS MARIJN E · CIK 0001216068 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 24,880

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001562180-21-000339 · primarydocument.xml · nonDerivative · entry 1

DEKKERS MARIJN E · CIK 0001216068 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,980

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001562180-21-000187 · primarydocument.xml · nonDerivative · entry 1

Fry John J · CIK 0001419544 · General Counsel & Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 31,885

F1 · shares: The sales of shares reported on this Form 4 were made solely to cover tax obligations upon the vesting of 468 RSUs.

F2 · price: This transaction was executed in multiple trades at prices ranging from $43.91 to $44.62. 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 · balance_after: Includes 24,744 restricted stock units.

SEC source: 0001562180-21-000186 · primarydocument.xml · nonDerivative · entry 1

HRUSOVSKY E KEVIN · CIK 0001252546 · Director · Chairman, President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,015,788

F1 · shares: The sales of shares reported on this Form 4 were made solely to cover tax obligations upon the vesting of 7,123 RSUs.

F2 · price: This transaction was executed in multiple trades at prices ranging from $43.91 to $44.62. 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 · balance_after: Includes 135,394 restricted stock units and 39,815 shares of common stock that are subject to performance based vesting.

SEC source: 0001562180-21-000185 · primarydocument.xml · nonDerivative · entry 1

Mattoon Dawn · CIK 0001731785 · Sr. VP, Research Products

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 31,016

F1 · shares: The sales of shares reported on this Form 4 were made solely to cover tax obligations upon the vesting of 518 RSUs.

F2 · price: This transaction was executed in multiple trades at prices ranging from $43.91 to $44.62. 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 · balance_after: Includes 20,340 restricted stock units.

SEC source: 0001562180-21-000190 · primarydocument.xml · nonDerivative · entry 1

Chaubal Amol · CIK 0001773089 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 25,500

F1 · shares: The sales of shares reported on this Form 4 were made solely to cover tax obligations upon the vesting of 380 RSUs.

F2 · price: This transaction was executed in multiple trades at prices ranging from $43.91 to $44.62. 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 · balance_after: Includes 19,561 restricted stock units.

SEC source: 0001562180-21-000184 · primarydocument.xml · nonDerivative · entry 1

Roskey Mark T. · CIK 0001724565 · SVP, Commercial & Accelerator

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,837

F1 · shares: The sales of shares reported on this Form 4 were made solely to cover tax obligations upon the vesting of 298 RSUs.

F2 · price: This transaction was executed in multiple trades at prices ranging from $43.91 to $44.62. 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 · balance_after: Includes 14,667 restricted stock units.

SEC source: 0001562180-21-000114 · primarydocument.xml · derivative · entry 3

Hlavinka Sarah E. · CIK 0001433554 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,900

Underlying: Common Stock · 7,900 shares

Expires 2031-01-04

F5 · shares: Represents non-qualified stock option to purchase 7,900 shares of common stock granted pursuant to the Quanterix Corporation 2018 Non-Employee Director Compensation Policy.

SEC source: 0001562180-21-000114 · primarydocument.xml · nonDerivative · entry 2

Hlavinka Sarah E. · CIK 0001433554 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,268

F3 · shares: 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 2020.

F4 · price: Closing price of the Company's common stock on the Nasdaq Global Market on January 4, 2021.

F2 · balance_after: Includes 5,297 restricted stock units.

SEC source: 0001562180-21-000114 · primarydocument.xml · nonDerivative · entry 1

Hlavinka Sarah E. · CIK 0001433554 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,999

F1 · shares: Represents restricted stock units that vest as to 100% of the shares on December 31, 2021 granted pursuant to the Quanterix Corporation 2018 Non-Employee Director Compensation Policy. Each restricted stock unit represents the right to receive one share of the Issuer's common stock.

F2 · balance_after: Includes 5,297 restricted stock units.

SEC source: 0001562180-21-000099 · primarydocument.xml · derivative · entry 4

Madaus Martin D · CIK 0001310268 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,900

Underlying: Common Stock · 7,900 shares

Expires 2031-01-04

F6 · shares: Represents non-qualified stock option to purchase 7,900 shares of common stock granted pursuant to the Quanterix Corporation 2018 Non-Employee Director Compensation Policy.

SEC source: 0001562180-21-000099 · primarydocument.xml · nonDerivative · entry 2

Madaus Martin D · CIK 0001310268 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,396

F3 · shares: 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 2020.

F4 · price: Closing price of the Company's common stock on the Nasdaq Global Market on January 4, 2021.

F2 · balance_after: Includes 2,270 restricted stock units.

SEC source: 0001562180-21-000099 · primarydocument.xml · nonDerivative · entry 1

Madaus Martin D · CIK 0001310268 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,986

F1 · shares: Represents restricted stock units that vest as to 100% of the shares on December 31, 2021 granted pursuant to the Quanterix Corporation 2018 Non-Employee Director Compensation Policy. Each restricted stock unit represents the right to receive one share of the Issuer's common stock.

F2 · balance_after: Includes 2,270 restricted stock units.

SEC source: 0001562180-21-000098 · primarydocument.xml · derivative · entry 3

MEISTER PAUL M · CIK 0001033876 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,900

Underlying: Common Stock · 7,900 shares

Expires 2031-01-04

F5 · shares: Represents non-qualified stock option to purchase 7,900 shares of common stock granted pursuant to the Quanterix Corporation 2018 Non-Employee Director Compensation Policy.

SEC source: 0001562180-21-000098 · primarydocument.xml · nonDerivative · entry 2

MEISTER PAUL M · CIK 0001033876 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,207

F3 · shares: 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 2020.

F4 · price: Closing price of the Company's common stock on the Nasdaq Global Market on January 4, 2021.

F2 · balance_after: Includes 2,270 restricted stock units.

SEC source: 0001562180-21-000098 · primarydocument.xml · nonDerivative · entry 1

MEISTER PAUL M · CIK 0001033876 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 12,896

F1 · shares: Represents restricted stock units that vest as to 100% of the shares on December 31, 2021 granted pursuant to the Quanterix Corporation 2018 Non-Employee Director Compensation Policy. Each restricted stock unit represents the right to receive one share of the Issuer's common stock.

F2 · balance_after: Includes 2,270 restricted stock units.

SEC source: 0001562180-21-000113 · primarydocument.xml · derivative · entry 2

WALT DAVID R · CIK 0001205236 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,900

Underlying: Common Stock · 7,900 shares

Expires 2031-01-04

F3 · shares: Represents non-qualified stock option to purchase 7,900 shares of common stock granted pursuant to the Quanterix Corporation 2018 Non-Employee Director Compensation Policy.

SEC source: 0001562180-21-000113 · primarydocument.xml · nonDerivative · entry 1

WALT DAVID R · CIK 0001205236 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,278,644

F1 · shares: Represents restricted stock units that vest as to 100% of the shares on December 31, 2021 granted pursuant to the Quanterix Corporation 2018 Non-Employee Director Compensation Policy. Each restricted stock unit represents the right to receive one share of the Issuer's common stock.

F2 · balance_after: Includes 2,270 restricted stock units.

SEC source: 0001562180-21-000112 · primarydocument.xml · derivative · entry 2

DEKKERS MARIJN E · CIK 0001216068 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,900

Underlying: Common Stock · 7,900 shares

Expires 2031-01-04

F3 · shares: Represents non-qualified stock option to purchase 7,900 shares of common stock granted pursuant to the Quanterix Corporation 2018 Non-Employee Director Compensation Policy.

SEC source: 0001562180-21-000112 · primarydocument.xml · nonDerivative · entry 1

DEKKERS MARIJN E · CIK 0001216068 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,080

F1 · shares: Represents restricted stock units that vest as to 100% of the shares on December 31, 2021 granted pursuant to the Quanterix Corporation 2018 Non-Employee Director Compensation Policy. Each restricted stock unit represents the right to receive one share of the Issuer's common stock.

F2 · balance_after: Includes 2,270 restricted stock units.

SEC source: 0001562180-21-000111 · primarydocument.xml · derivative · entry 5

CRANDELL KEITH · CIK 0001219039 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,900

Underlying: Common Stock · 7,900 shares

Expires 2031-01-04

F7 · shares: Represents non-qualified stock option to purchase 7,900 shares of common stock granted pursuant to the Quanterix Corporation 2018 Non-Employee Director Compensation Policy.

SEC source: 0001562180-21-000111 · primarydocument.xml · nonDerivative · entry 2

CRANDELL KEITH · CIK 0001219039 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,426

F3 · shares: 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 2020.

F4 · price: Closing price of the Company's common stock on the Nasdaq Global Market on January 4, 2021.

F2 · balance_after: Includes 2,270 restricted stock units.

SEC source: 0001562180-21-000111 · primarydocument.xml · nonDerivative · entry 1

CRANDELL KEITH · CIK 0001219039 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,229

F1 · shares: Represents restricted stock units that vest as to 100% of the shares on December 31, 2021 granted pursuant to the Quanterix Corporation 2018 Non-Employee Director Compensation Policy. Each restricted stock unit represents the right to receive one share of the Issuer's common stock.

F2 · balance_after: Includes 2,270 restricted stock units.

SEC source: 0001562180-20-007392 · primarydocument.xml · derivative · entry 3

Duffy David C. · CIK 0001724566 · SVP R&D and CTO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,023

Underlying: Common Stock · 1,630 shares

Expires 2022-02-03

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_date: Option is fully vested.

SEC source: 0001562180-20-007392 · primarydocument.xml · nonDerivative · entry 2

Duffy David C. · CIK 0001724566 · SVP R&D and CTO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 41,140

F1 · shares: The sale of shares reported on this Form 4 was made pursuant to a Rule 10b5-1 trading plan adopted on May 15, 2020.

F2 · balance_after: Includes 11,620 restricted stock units.