MASS

SEC source: 0001562180-22-002845 · primarydocument.xml · nonDerivative · entry 2

Kenneweg John · CIK 0001836876 · Vice President, Government

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

F1 · kind: Represents sales effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.00 to $20.27, inclusive. The reporting person undertakes to provide to 908 Devices Inc., any security holder of 908 Devices Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

SEC source: 0001562180-22-002845 · primarydocument.xml · nonDerivative · entry 1

Kenneweg John · CIK 0001836876 · Vice President, Government

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,881

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: 0001562180-22-002844 · primarydocument.xml · nonDerivative · entry 1

Brown Christopher D. · CIK 0001836988 · Chief Technology Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 968,912

F1 · kind: Represents sales effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.00 to $20.28, inclusive. The reporting person undertakes to provide to 908 Devices Inc., any security holder of 908 Devices Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

SEC source: 0001562180-22-002645 · primarydocument.xml · derivative · entry 6

Basarsky Trent A. · CIK 0001608021 · VP, Corporate Development

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 34,570

Underlying: Common Stock, par value $0.001 · 36,875 shares

Expires 2030-09-14

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.

F5 · derivative.exercise_date: The shares underlying the option become vested and exercisable in substantially equal monthly installments over the 48 months following September 11, 2020, subject to the reporting person's continued service through the applicable vesting date.

SEC source: 0001562180-22-002645 · primarydocument.xml · derivative · entry 5

Basarsky Trent A. · CIK 0001608021 · VP, Corporate Development

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 23,441

Underlying: Common Stock, par value $0.001 · 36,136 shares

Expires 2027-04-26

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.

F4 · derivative.exercise_date: The shares underlying the option are fully vested and immediately exercisable.

SEC source: 0001562180-22-002645 · primarydocument.xml · nonDerivative · entry 4

Basarsky Trent A. · CIK 0001608021 · VP, Corporate Development

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 60,000

F1 · kind: Represents sales effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $17.93 to $18.67,inclusive. The reporting person undertakes to provide to 908 Devices Inc., any security holder of 908 Devices Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

SEC source: 0001562180-22-002645 · primarydocument.xml · nonDerivative · entry 3

Basarsky Trent A. · CIK 0001608021 · VP, Corporate Development

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 66,763

F1 · kind: Represents sales effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $16.93 to $17.71,inclusive. The reporting person undertakes to provide to 908 Devices Inc., any security holder of 908 Devices Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

SEC source: 0001562180-22-002645 · primarydocument.xml · nonDerivative · entry 2

Basarsky Trent A. · CIK 0001608021 · VP, Corporate Development

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 75,000

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: 0001562180-22-002645 · primarydocument.xml · nonDerivative · entry 1

Basarsky Trent A. · CIK 0001608021 · VP, Corporate Development

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 72,695

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: 0001562180-22-002649 · primarydocument.xml · nonDerivative · entry 1

Brown Christopher D. · CIK 0001836988 · Chief Technology Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 988,812

F1 · kind: Represents sales effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.

SEC source: 0001562180-22-002648 · primarydocument.xml · derivative · entry 3

Kenneweg John · CIK 0001836876 · Vice President, Government

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 82,914

Underlying: Common Stock, par value $0.001 · 83,033 shares

Expires 2023-04-18

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.

F2 · derivative.exercise_date: The shares underlying the option are fully vested and immediately exercisable.

SEC source: 0001562180-22-002648 · primarydocument.xml · nonDerivative · entry 2

Kenneweg John · CIK 0001836876 · Vice President, Government

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

F1 · kind: Represents sales effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.

SEC source: 0001562180-22-002648 · primarydocument.xml · nonDerivative · entry 1

Kenneweg John · CIK 0001836876 · Vice President, Government

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 119

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: 0001562180-22-002374 · primarydocument.xml · derivative · entry 2

Hunt Anthony · CIK 0001606030 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,362

Underlying: Common Stock, par value $0.001 · 10,362 shares

Expires not disclosed

F2 · derivative.exercise_price: Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of Common Stock, par value $0.001, when vested.

F3 · derivative.exercise_date: The RSUs become vested in substantially equal annual installments over the 3 years following March 2, 2022, subject to the reporting person's continued service through the applicable vesting date, provided that, if the reporting person terminates their service for any reason, then a prorated number of RSUs will vest. The RSUs have no expiration date.

F3 · derivative.expiration_date: The RSUs become vested in substantially equal annual installments over the 3 years following March 2, 2022, subject to the reporting person's continued service through the applicable vesting date, provided that, if the reporting person terminates their service for any reason, then a prorated number of RSUs will vest. The RSUs have no expiration date.

SEC source: 0001562180-22-002374 · primarydocument.xml · derivative · entry 1

Hunt Anthony · CIK 0001606030 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,173

Underlying: Common Stock, par value $0.001 · 6,173 shares

Expires 2032-03-02

F1 · derivative.exercise_date: The shares underlying the option become vested and exercisable in substantially equal monthly installments over the 36 months following March 2, 2022, subject to the reporting person's continued service through the applicable vesting date.

SEC source: 0001562180-22-002267 · primarydocument.xml · derivative · entry 2

Griffith Joseph H. IV · CIK 0001431531 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 20,409

Underlying: Common Stock, par value $0.001 · 20,409 shares

Expires not disclosed

F2 · derivative.exercise_price: Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of Common Stock, par value $0.001, when vested.

F3 · derivative.exercise_date: The RSUs shall vest 25% on March 1, 2023, with the remaining 75% vesting in three substantially equal annual installments at the three anniversary dates following March 1, 2023, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

F3 · derivative.expiration_date: The RSUs shall vest 25% on March 1, 2023, with the remaining 75% vesting in three substantially equal annual installments at the three anniversary dates following March 1, 2023, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

SEC source: 0001562180-22-002267 · primarydocument.xml · derivative · entry 1

Griffith Joseph H. IV · CIK 0001431531 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 33,899

Underlying: Common Stock, par value $0.001 · 33,899 shares

Expires 2032-03-01

F1 · derivative.exercise_date: Twenty-five percent of the shares underlying the option become vested and exercisable on March 1, 2023, and the remaining 75% of the shares underlying the option become vested and exercisable in substantially equal monthly installments over the 36 months following March 1, 2023, subject to the reporting person's continued service through the applicable vesting date.

SEC source: 0001562180-22-002268 · primarydocument.xml · derivative · entry 2

Kenneweg John · CIK 0001836876 · Vice President, Government

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,104

Underlying: Common Stock, par value $0.001 · 8,104 shares

Expires not disclosed

F2 · derivative.exercise_price: Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of Common Stock, par value $0.001, when vested.

F3 · derivative.exercise_date: The RSUs shall vest 25% on March 1, 2023, with the remaining 75% vesting in three substantially equal annual installments at the three anniversary dates following March 1, 2023, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

F3 · derivative.expiration_date: The RSUs shall vest 25% on March 1, 2023, with the remaining 75% vesting in three substantially equal annual installments at the three anniversary dates following March 1, 2023, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

SEC source: 0001562180-22-002268 · primarydocument.xml · derivative · entry 1

Kenneweg John · CIK 0001836876 · Vice President, Government

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,460

Underlying: Common Stock, par value $0.001 · 13,460 shares

Expires 2032-03-01

F1 · derivative.exercise_date: Twenty-five percent of the shares underlying the option become vested and exercisable on March 1, 2023, and the remaining 75% of the shares underlying the option become vested and exercisable in substantially equal monthly installments over the 36 months following March 1, 2023, subject to the reporting person's continued service through the applicable vesting date.

SEC source: 0001562180-22-002270 · primarydocument.xml · derivative · entry 2

Turner Michael S. · CIK 0001836524 · VP, General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,708

Underlying: Common Stock, par value $0.001 · 17,708 shares

Expires not disclosed

F2 · derivative.exercise_price: Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of Common Stock, par value $0.001, when vested.

F3 · derivative.exercise_date: The RSUs shall vest 25% on March 1, 2023, with the remaining 75% vesting in three substantially equal annual installments at the three anniversary dates following March 1, 2023, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

F3 · derivative.expiration_date: The RSUs shall vest 25% on March 1, 2023, with the remaining 75% vesting in three substantially equal annual installments at the three anniversary dates following March 1, 2023, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

SEC source: 0001562180-22-002270 · primarydocument.xml · derivative · entry 1

Turner Michael S. · CIK 0001836524 · VP, General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,412

Underlying: Common Stock, par value $0.001 · 29,412 shares

Expires 2032-03-01

F1 · derivative.exercise_date: Twenty-five percent of the shares underlying the option become vested and exercisable on March 1, 2023, and the remaining 75% of the shares underlying the option become vested and exercisable in substantially equal monthly installments over the 36 months following March 1, 2023, subject to the reporting person's continued service through the applicable vesting date.

SEC source: 0001562180-22-002269 · primarydocument.xml · derivative · entry 2

Knopp Kevin J. · CIK 0001836523 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 45,019

Underlying: Common Stock, par value $0.001 · 45,019 shares

Expires not disclosed

F2 · derivative.exercise_price: Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of Common Stock, par value $0.001, when vested.

F3 · derivative.exercise_date: The RSUs shall vest 25% on March 1, 2023, with the remaining 75% vesting in three substantially equal annual installments at the three anniversary dates following March 1, 2023, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

F3 · derivative.expiration_date: The RSUs shall vest 25% on March 1, 2023, with the remaining 75% vesting in three substantially equal annual installments at the three anniversary dates following March 1, 2023, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

SEC source: 0001562180-22-002269 · primarydocument.xml · derivative · entry 1

Knopp Kevin J. · CIK 0001836523 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 74,776

Underlying: Common Stock, par value $0.001 · 74,776 shares

Expires 2032-03-01

F1 · derivative.exercise_date: Twenty-five percent of the shares underlying the option become vested and exercisable on March 1, 2023, and the remaining 75% of the shares underlying the option become vested and exercisable in substantially equal monthly installments over the 36 months following March 1, 2023, subject to the reporting person's continued service through the applicable vesting date.

SEC source: 0001562180-22-002266 · primarydocument.xml · derivative · entry 2

Brown Christopher D. · CIK 0001836988 · Chief Technology Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 20,109

Underlying: Common Stock, par value $0.001 · 20,109 shares

Expires not disclosed

F2 · derivative.exercise_price: Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of Common Stock, par value $0.001, when vested.

F3 · derivative.exercise_date: The RSUs shall vest 25% on March 1, 2023, with the remaining 75% vesting in three substantially equal annual installments at the three anniversary dates following March 1, 2023, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

F3 · derivative.expiration_date: The RSUs shall vest 25% on March 1, 2023, with the remaining 75% vesting in three substantially equal annual installments at the three anniversary dates following March 1, 2023, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

SEC source: 0001562180-22-002266 · primarydocument.xml · derivative · entry 1

Brown Christopher D. · CIK 0001836988 · Chief Technology Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 33,400

Underlying: Common Stock, par value $0.001 · 33,400 shares

Expires 2032-03-01

F1 · derivative.exercise_date: Twenty-five percent of the shares underlying the option become vested and exercisable on March 1, 2023, and the remaining 75% of the shares underlying the option become vested and exercisable in substantially equal monthly installments over the 36 months following March 1, 2023, subject to the reporting person's continued service through the applicable vesting date.

SEC source: 0001562180-22-002263 · primarydocument.xml · derivative · entry 2

Basarsky Trent A. · CIK 0001608021 · VP, Corporate Development

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,828

Underlying: Common Stock, par value $0.001 · 17,828 shares

Expires not disclosed

F2 · derivative.exercise_price: Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of Common Stock, par value $0.001, when vested.

F3 · derivative.exercise_date: The RSUs shall vest 25% on March 1, 2023, with the remaining 75% vesting in three substantially equal annual installments at the three anniversary dates following March 1, 2023, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

F3 · derivative.expiration_date: The RSUs shall vest 25% on March 1, 2023, with the remaining 75% vesting in three substantially equal annual installments at the three anniversary dates following March 1, 2023, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

SEC source: 0001562180-22-002263 · primarydocument.xml · derivative · entry 1

Basarsky Trent A. · CIK 0001608021 · VP, Corporate Development

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,612

Underlying: Common Stock, par value $0.001 · 29,612 shares

Expires 2032-03-01

F1 · derivative.exercise_date: Twenty-five percent of the shares underlying the option become vested and exercisable on March 1, 2023, and the remaining 75% of the shares underlying the option become vested and exercisable in substantially equal monthly installments over the 36 months following March 1, 2023, subject to the reporting person's continued service through the applicable vesting date.

SEC source: 0001562180-22-001929 · primarydocument.xml · derivative · entry 2

Basarsky Trent A. · CIK 0001608021 · VP, Corporate Development

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 36,136

Underlying: Common Stock, par value $0.001 · 51,136 shares

Expires 2027-04-26

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.

F1 · derivative.exercise_date: The shares underlying the option are fully vested and immediately exercisable.

SEC source: 0001562180-22-001929 · primarydocument.xml · nonDerivative · entry 1

Basarsky Trent A. · CIK 0001608021 · VP, Corporate Development

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 60,000

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: 0001562180-22-001761 · primarydocument.xml · derivative · entry 2

George Jeffrey P. · CIK 0001796789 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,015

Underlying: Common Stock, par value $0.001 · 1,523 shares

Expires not disclosed

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.

F1 · derivative.exercise_price: Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of Common Stock, par value $0.001, when vested.

F2 · derivative.exercise_date: The RSUs become vested in substantially equal annual installments over the 3 years following February 22, 2021, subject to the reporting person's continued service through the applicable vesting date, provided that, if the reporting person terminates their service for any reason, then a prorated number of RSUs will vest. The RSUs have no expiration date.

F2 · derivative.expiration_date: The RSUs become vested in substantially equal annual installments over the 3 years following February 22, 2021, subject to the reporting person's continued service through the applicable vesting date, provided that, if the reporting person terminates their service for any reason, then a prorated number of RSUs will vest. The RSUs have no expiration date.

SEC source: 0001562180-22-001761 · primarydocument.xml · nonDerivative · entry 1

George Jeffrey P. · CIK 0001796789 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 508

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.

F1 · price: Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of Common Stock, par value $0.001, when vested.

SEC source: 0001562180-22-001759 · primarydocument.xml · derivative · entry 2

ELOI FENEL M · CIK 0001237190 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,015

Underlying: Common Stock, par value $0.001 · 1,523 shares

Expires not disclosed

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.

F1 · derivative.exercise_price: Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of Common Stock, par value $0.001, when vested.

F2 · derivative.exercise_date: The RSUs become vested in substantially equal annual installments over the 3 years following February 22, 2021, subject to the reporting person's continued service through the applicable vesting date, provided that, if the reporting person terminates their service for any reason, then a prorated number of RSUs will vest. The RSUs have no expiration date.

F2 · derivative.expiration_date: The RSUs become vested in substantially equal annual installments over the 3 years following February 22, 2021, subject to the reporting person's continued service through the applicable vesting date, provided that, if the reporting person terminates their service for any reason, then a prorated number of RSUs will vest. The RSUs have no expiration date.

SEC source: 0001562180-22-001759 · primarydocument.xml · nonDerivative · entry 1

ELOI FENEL M · CIK 0001237190 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 508

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.

F1 · price: Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of Common Stock, par value $0.001, when vested.

SEC source: 0001562180-22-001509 · primarydocument.xml · derivative · entry 6

Basarsky Trent A. · CIK 0001608021 · VP, Corporate Development

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 51,136

Underlying: Common Stock, par value $0.001 · 60,428 shares

Expires 2027-04-26

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.

F4 · derivative.exercise_date: The shares underlying the option are fully vested and immediately exercisable.

SEC source: 0001562180-22-001509 · primarydocument.xml · nonDerivative · entry 4

Basarsky Trent A. · CIK 0001608021 · VP, Corporate Development

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 45,000

F1 · kind: Represents sales effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.00 to $15.43, inclusive. The reporting person undertakes to provide to 908 Devices Inc., any security holder of 908 Devices Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

SEC source: 0001562180-22-001509 · primarydocument.xml · nonDerivative · entry 3

Basarsky Trent A. · CIK 0001608021 · VP, Corporate Development

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 54,292

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: 0001562180-22-001509 · primarydocument.xml · derivative · entry 5

Basarsky Trent A. · CIK 0001608021 · VP, Corporate Development

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 60,428

Underlying: Common Stock, par value $0.001 · 66,136 shares

Expires 2027-04-26

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.

F4 · derivative.exercise_date: The shares underlying the option are fully vested and immediately exercisable.

SEC source: 0001562180-22-001509 · primarydocument.xml · nonDerivative · entry 2

Basarsky Trent A. · CIK 0001608021 · VP, Corporate Development

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 45,000

F1 · kind: Represents sales effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.00 to $15.38, inclusive. The reporting person undertakes to provide to 908 Devices Inc., any security holder of 908 Devices Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

SEC source: 0001562180-22-001509 · primarydocument.xml · nonDerivative · entry 1

Basarsky Trent A. · CIK 0001608021 · VP, Corporate Development

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 50,708

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: 0001562180-22-000476 · primarydocument.xml · derivative · entry 4

Basarsky Trent A. · CIK 0001608021 · VP, Corporate Development

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 66,136

Underlying: Common Stock, par value $0.001 · 81,136 shares

Expires 2027-04-26

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.

F4 · derivative.exercise_date: The shares underlying the option are fully vested and immediately exercisable.

SEC source: 0001562180-22-000476 · primarydocument.xml · nonDerivative · entry 3

Basarsky Trent A. · CIK 0001608021 · VP, Corporate Development

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 45,000

F1 · kind: Represents sales effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $19.90 to $20.53, inclusive. The reporting person undertakes to provide to 908 Devices Inc., any security holder of 908 Devices Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

SEC source: 0001562180-22-000476 · primarydocument.xml · nonDerivative · entry 2

Basarsky Trent A. · CIK 0001608021 · VP, Corporate Development

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 47,000

F1 · kind: Represents sales effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $18.87 to $19.80, inclusive. The reporting person undertakes to provide to 908 Devices Inc., any security holder of 908 Devices Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

SEC source: 0001562180-22-000476 · primarydocument.xml · nonDerivative · entry 1

Basarsky Trent A. · CIK 0001608021 · VP, Corporate Development

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 60,000

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: 0001562180-22-000428 · primarydocument.xml · derivative · entry 6

Kenneweg John · CIK 0001836876 · Vice President, Government

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 83,033

Underlying: Common Stock, par value $0.001 · 92,333 shares

Expires 2023-04-18

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.

F4 · derivative.exercise_date: The shares underlying the option are fully vested and immediately exercisable.

SEC source: 0001562180-22-000428 · primarydocument.xml · nonDerivative · entry 4

Kenneweg John · CIK 0001836876 · Vice President, Government

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

F1 · kind: Represents sales effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.00 to $20.35, inclusive. The reporting person undertakes to provide to 908 Devices Inc., any security holder of 908 Devices Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

SEC source: 0001562180-22-000428 · primarydocument.xml · nonDerivative · entry 3

Kenneweg John · CIK 0001836876 · Vice President, Government

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,300

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: 0001562180-22-000428 · primarydocument.xml · derivative · entry 5

Kenneweg John · CIK 0001836876 · Vice President, Government

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 92,333

Underlying: Common Stock, par value $0.001 · 93,033 shares

Expires 2023-04-18

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.

F4 · derivative.exercise_date: The shares underlying the option are fully vested and immediately exercisable.

SEC source: 0001562180-22-000428 · primarydocument.xml · nonDerivative · entry 2

Kenneweg John · CIK 0001836876 · Vice President, Government

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

F1 · kind: Represents sales effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.01 to $20.08, inclusive. The reporting person undertakes to provide to 908 Devices Inc., any security holder of 908 Devices Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

SEC source: 0001562180-22-000428 · primarydocument.xml · nonDerivative · entry 1

Kenneweg John · CIK 0001836876 · Vice President, Government

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 700

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: 0001562180-22-000335 · primarydocument.xml · nonDerivative · entry 2

Brown Christopher D. · CIK 0001836988 · Chief Technology Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 988,912

F1 · kind: Represents sales effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $23.67 to $24.50, inclusive. The reporting person undertakes to provide to 908 Devices Inc., any security holder of 908 Devices Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.