MASS

SEC source: 0001562180-25-000892 · primarydocument.xml · nonDerivative · entry 5

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 699,257

F2 · kind: The sale reported on this Form 4 represents shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting and settlement of RSUs. The sale is mandated by the Issuer's election to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary transaction 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 $2.29 to $2.38, 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: 0001562180-25-000892 · primarydocument.xml · nonDerivative · entry 4

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 704,416

F2 · kind: The sale reported on this Form 4 represents shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting and settlement of RSUs. The sale is mandated by the Issuer's election to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary transaction 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 $2.29 to $2.38, 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: 0001562180-25-000894 · primarydocument.xml · derivative · entry 9

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,781

Underlying: Common Stock · 11,261 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, at settlement, one share of Common Stock. This transaction represents the settlement of RSUs in shares of Common Stock on their scheduled vesting date.

F8 · derivative.exercise_date: These RSUs vest in four substantially equal annual installments at the four anniversary dates following February 1, 2024, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

F8 · derivative.expiration_date: These RSUs vest in four substantially equal annual installments at the four anniversary dates following February 1, 2024, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

SEC source: 0001562180-25-000894 · primarydocument.xml · derivative · entry 8

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,612

Underlying: Common Stock · 10,306 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, at settlement, one share of Common Stock. This transaction represents the settlement of RSUs in shares of Common Stock on their scheduled vesting date.

F7 · derivative.exercise_date: These RSUs vest in four substantially equal annual installments at the four anniversary dates following February 1, 2023, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

F7 · derivative.expiration_date: These RSUs vest in four substantially equal annual installments at the four anniversary dates following February 1, 2023, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

SEC source: 0001562180-25-000894 · primarydocument.xml · derivative · entry 7

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,102

Underlying: Common Stock · 5,102 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, at settlement, one share of Common Stock. This transaction represents the settlement of RSUs in shares of Common Stock on their scheduled vesting date.

F6 · derivative.exercise_date: These RSUs vest in four substantially equal annual installments at the four anniversary dates following February 1, 2022, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

F6 · derivative.expiration_date: These RSUs vest in four substantially equal annual installments at the four anniversary dates following February 1, 2022, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

SEC source: 0001562180-25-000894 · primarydocument.xml · nonDerivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 120,106

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, at settlement, one share of Common Stock. This transaction represents the settlement of RSUs in shares of Common Stock on their scheduled vesting date.

SEC source: 0001562180-25-000894 · primarydocument.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 108,845

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, at settlement, one share of Common Stock. This transaction represents the settlement of RSUs in shares of Common Stock on their scheduled vesting date.

SEC source: 0001562180-25-000894 · primarydocument.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 98,539

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, at settlement, one share of Common Stock. This transaction represents the settlement of RSUs in shares of Common Stock on their scheduled vesting date.

SEC source: 0001562180-25-000893 · primarydocument.xml · derivative · entry 9

Turner Michael S. · CIK 0001836524 · Chief Legal & Admin Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,500

Underlying: Common Stock · 10,834 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, at settlement, one share of Common Stock. This transaction represents the settlement of RSUs in shares of Common Stock on their scheduled vesting date.

F8 · derivative.exercise_date: These RSUs vest in four substantially equal annual installments at the four anniversary dates following February 1, 2024, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

F8 · derivative.expiration_date: These RSUs vest in four substantially equal annual installments at the four anniversary dates following February 1, 2024, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

SEC source: 0001562180-25-000893 · primarydocument.xml · derivative · entry 8

Turner Michael S. · CIK 0001836524 · Chief Legal & Admin Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,819

Underlying: Common Stock · 9,909 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, at settlement, one share of Common Stock. This transaction represents the settlement of RSUs in shares of Common Stock on their scheduled vesting date.

F7 · derivative.exercise_date: These RSUs vest in four substantially equal annual installments at the four anniversary dates following February 1, 2023, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

F7 · derivative.expiration_date: These RSUs vest in four substantially equal annual installments at the four anniversary dates following February 1, 2023, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

SEC source: 0001562180-25-000893 · primarydocument.xml · derivative · entry 7

Turner Michael S. · CIK 0001836524 · Chief Legal & Admin Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,427

Underlying: Common Stock · 4,427 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, at settlement, one share of Common Stock. This transaction represents the settlement of RSUs in shares of Common Stock on their scheduled vesting date.

F6 · derivative.exercise_date: These RSUs vest in four substantially equal annual installments at the four anniversary dates following February 1, 2022, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

F6 · derivative.expiration_date: These RSUs vest in four substantially equal annual installments at the four anniversary dates following February 1, 2022, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

SEC source: 0001562180-25-000893 · primarydocument.xml · nonDerivative · entry 3

Turner Michael S. · CIK 0001836524 · Chief Legal & Admin Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,275

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, at settlement, one share of Common Stock. This transaction represents the settlement of RSUs in shares of Common Stock on their scheduled vesting date.

SEC source: 0001562180-25-000893 · primarydocument.xml · nonDerivative · entry 2

Turner Michael S. · CIK 0001836524 · Chief Legal & Admin Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,441

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, at settlement, one share of Common Stock. This transaction represents the settlement of RSUs in shares of Common Stock on their scheduled vesting date.

SEC source: 0001562180-25-000893 · primarydocument.xml · nonDerivative · entry 1

Turner Michael S. · CIK 0001836524 · Chief Legal & Admin Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,532

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, at settlement, one share of Common Stock. This transaction represents the settlement of RSUs in shares of Common Stock on their scheduled vesting date.

SEC source: 0001562180-25-000891 · primarydocument.xml · derivative · entry 9

Brown Christopher D. · CIK 0001836988 · Chief Product Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,974

Underlying: Common Stock · 10,991 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, at settlement, one share of Common Stock. This transaction represents the settlement of RSUs in shares of Common Stock on their scheduled vesting date.

F8 · derivative.exercise_date: These RSUs vest in four substantially equal annual installments at the four anniversary dates following February 1, 2024, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

F8 · derivative.expiration_date: These RSUs vest in four substantially equal annual installments at the four anniversary dates following February 1, 2024, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

SEC source: 0001562180-25-000891 · primarydocument.xml · derivative · entry 8

Brown Christopher D. · CIK 0001836988 · Chief Product Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,836

Underlying: Common Stock · 7,418 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, at settlement, one share of Common Stock. This transaction represents the settlement of RSUs in shares of Common Stock on their scheduled vesting date.

F7 · derivative.exercise_date: These RSUs vest in four substantially equal annual installments at the four anniversary dates following February 1, 2023, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

F7 · derivative.expiration_date: These RSUs vest in four substantially equal annual installments at the four anniversary dates following February 1, 2023, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

SEC source: 0001562180-25-000891 · primarydocument.xml · derivative · entry 7

Brown Christopher D. · CIK 0001836988 · Chief Product Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,027

Underlying: Common Stock · 5,027 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, at settlement, one share of Common Stock. This transaction represents the settlement of RSUs in shares of Common Stock on their scheduled vesting date.

F6 · derivative.exercise_date: These RSUs vest in four substantially equal annual installments at the four anniversary dates following February 1, 2022, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

F6 · derivative.expiration_date: These RSUs vest in four substantially equal annual installments at the four anniversary dates following February 1, 2022, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

SEC source: 0001562180-25-000891 · primarydocument.xml · nonDerivative · entry 3

Brown Christopher D. · CIK 0001836988 · Chief Product Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 969,889

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, at settlement, one share of Common Stock. This transaction represents the settlement of RSUs in shares of Common Stock on their scheduled vesting date.

SEC source: 0001562180-25-000891 · primarydocument.xml · nonDerivative · entry 2

Brown Christopher D. · CIK 0001836988 · Chief Product Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 958,898

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, at settlement, one share of Common Stock. This transaction represents the settlement of RSUs in shares of Common Stock on their scheduled vesting date.

SEC source: 0001562180-25-000891 · primarydocument.xml · nonDerivative · entry 1

Brown Christopher D. · CIK 0001836988 · Chief Product Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 951,480

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, at settlement, one share of Common Stock. This transaction represents the settlement of RSUs in shares of Common Stock on their scheduled vesting date.

SEC source: 0001562180-25-000892 · primarydocument.xml · derivative · entry 10

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 51,021

Underlying: Common Stock · 17,007 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, at settlement, one share of Common Stock. This transaction represents the settlement of RSUs in shares of Common Stock on their scheduled vesting date.

F8 · derivative.exercise_date: These RSUs vest in four substantially equal annual installments at the four anniversary dates following February 1, 2024, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

F8 · derivative.expiration_date: These RSUs vest in four substantially equal annual installments at the four anniversary dates following February 1, 2024, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

SEC source: 0001562180-25-000892 · primarydocument.xml · derivative · entry 9

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,897

Underlying: Common Stock · 13,448 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, at settlement, one share of Common Stock. This transaction represents the settlement of RSUs in shares of Common Stock on their scheduled vesting date.

F7 · derivative.exercise_date: These RSUs vest in four substantially equal annual installments at the four anniversary dates following February 1, 2023, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

F7 · derivative.expiration_date: These RSUs vest in four substantially equal annual installments at the four anniversary dates following February 1, 2023, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

SEC source: 0001562180-25-000892 · primarydocument.xml · derivative · entry 8

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,255

Underlying: Common Stock · 11,254 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, at settlement, one share of Common Stock. This transaction represents the settlement of RSUs in shares of Common Stock on their scheduled vesting date.

F6 · derivative.exercise_date: These RSUs vest in four substantially equal annual installments at the four anniversary dates following February 1, 2022, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

F6 · derivative.expiration_date: These RSUs vest in four substantially equal annual installments at the four anniversary dates following February 1, 2022, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

SEC source: 0001562180-25-000892 · primarydocument.xml · nonDerivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 708,734

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, at settlement, one share of Common Stock. This transaction represents the settlement of RSUs in shares of Common Stock on their scheduled vesting date.

SEC source: 0001562180-25-000892 · primarydocument.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 691,727

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, at settlement, one share of Common Stock. This transaction represents the settlement of RSUs in shares of Common Stock on their scheduled vesting date.

SEC source: 0001562180-25-000892 · primarydocument.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 678,279

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, at settlement, one share of Common Stock. This transaction represents the settlement of RSUs in shares of Common Stock on their scheduled vesting date.

SEC source: 0001562180-24-008522 · primarydocument.xml · derivative · entry 2

Brown Christopher D. · CIK 0001836988 · Chief Product Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 55,131 shares

Expires 2029-01-20

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: 0001562180-24-008522 · primarydocument.xml · nonDerivative · entry 1

Brown Christopher D. · CIK 0001836988 · Chief Product Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 946,453

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: 0001562180-24-008416 · primarydocument.xml · derivative · entry 5

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 110,626 shares

Expires 2029-01-21

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: 0001562180-24-008416 · primarydocument.xml · derivative · entry 4

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 47,418 shares

Expires 2027-01-01

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: 0001562180-24-008416 · primarydocument.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 667,025

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: 0001562180-24-008416 · primarydocument.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 556,399

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: 0001562180-24-006114 · primarydocument.xml · derivative · entry 2

Brown Christopher D. · CIK 0001836988 · Chief Product Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 55,131

Underlying: Common Stock · 61,459 shares

Expires 2029-01-20

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: 0001562180-24-006114 · primarydocument.xml · nonDerivative · entry 1

Brown Christopher D. · CIK 0001836988 · Chief Product Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 891,322

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: 0001562180-24-005312 · primarydocument.xml · derivative · entry 2

Leonhart Michele M. · CIK 0002027457 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,810

Underlying: Common Stock, par value $0.001 · 26,810 shares

Expires 2034-06-25

F3 · derivative.exercise_date: The shares underlying the option become vested and exercisable in substantially equal monthly installments over the 36 months following June 25, 2024, subject to the reporting person's continued service through the applicable vesting date.

SEC source: 0001562180-24-005312 · primarydocument.xml · derivative · entry 1

Leonhart Michele M. · CIK 0002027457 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,456

Underlying: Common Stock, par value $0.001 · 19,456 shares

Expires not disclosed

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 June 25, 2024, 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 June 25, 2024, 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: 0001562180-24-005062 · primarydocument.xml · derivative · entry 4

George Jeffrey P. · CIK 0001796789 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,996

Underlying: Common Stock · 15,996 shares

Expires 2033-06-15

F5 · derivative.exercise_date: The shares underlying the option become vested and exercisable in substantially equal monthly installments over the 12 months following June 13, 2024, subject to the reporting person's continued service through the applicable vesting date.

SEC source: 0001562180-24-005062 · primarydocument.xml · derivative · entry 3

George Jeffrey P. · CIK 0001796789 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,364

Underlying: Common Stock · 11,364 shares

Expires not disclosed

F3 · 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.

F4 · derivative.exercise_date: The RSUs become fully vested on June 13, 2025 or the day prior to the 2025 Annual Meeting of the Stockholders of 908 Devices Inc., whichever occurs first, 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.

F4 · derivative.expiration_date: The RSUs become fully vested on June 13, 2025 or the day prior to the 2025 Annual Meeting of the Stockholders of 908 Devices Inc., whichever occurs first, 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: 0001562180-24-005061 · primarydocument.xml · derivative · entry 4

ELOI FENEL M · CIK 0001237190 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,996

Underlying: Common Stock · 15,996 shares

Expires 2033-06-15

F5 · derivative.exercise_date: The shares underlying the option become vested and exercisable in substantially equal monthly installments over the 12 months following June 13, 2024, subject to the reporting person's continued service through the applicable vesting date.

SEC source: 0001562180-24-005061 · primarydocument.xml · derivative · entry 3

ELOI FENEL M · CIK 0001237190 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,364

Underlying: Common Stock · 11,364 shares

Expires not disclosed

F3 · 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.

F4 · derivative.exercise_date: The RSUs become fully vested on June 13, 2025 or the day prior to the 2025 Annual Meeting of the Stockholders of 908 Devices Inc., whichever occurs first, 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.

F4 · derivative.expiration_date: The RSUs become fully vested on June 13, 2025 or the day prior to the 2025 Annual Meeting of the Stockholders of 908 Devices Inc., whichever occurs first, 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: 0001562180-24-005066 · primarydocument.xml · derivative · entry 5

CRANDELL KEITH · CIK 0001219039 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,996

Underlying: Common Stock · 15,996 shares

Expires 2033-06-15

F6 · derivative.exercise_date: The shares underlying the option become vested and exercisable in substantially equal monthly installments over the 12 months following June 13, 2024, subject to the reporting person's continued service through the applicable vesting date.

SEC source: 0001562180-24-005066 · primarydocument.xml · derivative · entry 4

CRANDELL KEITH · CIK 0001219039 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,364

Underlying: Common Stock · 11,364 shares

Expires not disclosed

F4 · 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.

F5 · derivative.exercise_date: The RSUs become fully vested on June 13, 2025 or the day prior to the 2025 Annual Meeting of the Stockholders of 908 Devices Inc., whichever occurs first, 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.

F5 · derivative.expiration_date: The RSUs become fully vested on June 13, 2025 or the day prior to the 2025 Annual Meeting of the Stockholders of 908 Devices Inc., whichever occurs first, 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: 0001562180-24-005064 · primarydocument.xml · derivative · entry 5

HRUSOVSKY E KEVIN · CIK 0001252546 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,996

Underlying: Common Stock · 15,996 shares

Expires 2033-06-15

F6 · derivative.exercise_date: The shares underlying the option become vested and exercisable in substantially equal monthly installments over the 12 months following June 13, 2024, subject to the reporting person's continued service through the applicable vesting date.

SEC source: 0001562180-24-005064 · primarydocument.xml · derivative · entry 4

HRUSOVSKY E KEVIN · CIK 0001252546 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,364

Underlying: Common Stock · 11,364 shares

Expires not disclosed

F4 · 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.

F5 · derivative.exercise_date: The RSUs become fully vested on June 13, 2025 or the day prior to the 2025 Annual Meeting of the Stockholders of 908 Devices Inc., whichever occurs first, 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.

F5 · derivative.expiration_date: The RSUs become fully vested on June 13, 2025 or the day prior to the 2025 Annual Meeting of the Stockholders of 908 Devices Inc., whichever occurs first, 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: 0001562180-24-005065 · primarydocument.xml · derivative · entry 5

Spoto Mark · CIK 0001836585 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,996

Underlying: Common Stock · 15,996 shares

Expires 2033-06-15

F6 · derivative.exercise_date: The shares underlying the option become vested and exercisable in substantially equal monthly installments over the 12 months following June 13, 2024, subject to the reporting person's continued service through the applicable vesting date.

SEC source: 0001562180-24-005065 · primarydocument.xml · derivative · entry 4

Spoto Mark · CIK 0001836585 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,364

Underlying: Common Stock · 11,364 shares

Expires not disclosed

F4 · 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.

F5 · derivative.exercise_date: The RSUs become fully vested on June 13, 2025 or the day prior to the 2025 Annual Meeting of the Stockholders of 908 Devices Inc., whichever occurs first, 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.

F5 · derivative.expiration_date: The RSUs become fully vested on June 13, 2025 or the day prior to the 2025 Annual Meeting of the Stockholders of 908 Devices Inc., whichever occurs first, 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: 0001562180-24-005063 · primarydocument.xml · derivative · entry 4

Hunt Anthony · CIK 0001606030 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,996

Underlying: Common Stock · 15,996 shares

Expires 2033-06-15

F5 · derivative.exercise_date: The shares underlying the option become vested and exercisable in substantially equal monthly installments over the 12 months following June 13, 2024, subject to the reporting person's continued service through the applicable vesting date.

SEC source: 0001562180-24-005063 · primarydocument.xml · derivative · entry 3

Hunt Anthony · CIK 0001606030 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,364

Underlying: Common Stock · 11,364 shares

Expires not disclosed

F3 · 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.

F4 · derivative.exercise_date: The RSUs become fully vested on June 13, 2025 or the day prior to the 2025 Annual Meeting of the Stockholders of 908 Devices Inc., whichever occurs first, 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.

F4 · derivative.expiration_date: The RSUs become fully vested on June 13, 2025 or the day prior to the 2025 Annual Meeting of the Stockholders of 908 Devices Inc., whichever occurs first, 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: 0001562180-24-005060 · primarydocument.xml · derivative · entry 4

Eisenberg Marcia · CIK 0001866723 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,996

Underlying: Common Stock · 15,996 shares

Expires 2033-06-15

F5 · derivative.exercise_date: The shares underlying the option become vested and exercisable in substantially equal monthly installments over the 12 months following June 13, 2024, subject to the reporting person's continued service through the applicable vesting date.

SEC source: 0001562180-24-005060 · primarydocument.xml · derivative · entry 3

Eisenberg Marcia · CIK 0001866723 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,364

Underlying: Common Stock · 11,364 shares

Expires not disclosed

F3 · 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.

F4 · derivative.exercise_date: The RSUs become fully vested on June 13, 2025 or the day prior to the 2025 Annual Meeting of the Stockholders of 908 Devices Inc., whichever occurs first, 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.

F4 · derivative.expiration_date: The RSUs become fully vested on June 13, 2025 or the day prior to the 2025 Annual Meeting of the Stockholders of 908 Devices Inc., whichever occurs first, 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.