MASS

SEC source: 0001562180-24-005062 · primarydocument.xml · derivative · entry 2

George Jeffrey P. · CIK 0001796789 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 7,777 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. This transaction represents the settlement of RSUs in shares of Common Stock on their scheduled vesting date.

F2 · derivative.exercise_date: The RSUs became fully vested on June 12, 2024, the day prior to the 2024 Annual Meeting of the Stockholders of 908 Devices Inc. The RSUs have no expiration date.

F2 · derivative.expiration_date: The RSUs became fully vested on June 12, 2024, the day prior to the 2024 Annual Meeting of the Stockholders of 908 Devices Inc. The RSUs have no expiration date.

SEC source: 0001562180-24-005062 · primarydocument.xml · nonDerivative · entry 1

George Jeffrey P. · CIK 0001796789 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,450

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

SEC source: 0001562180-24-005061 · primarydocument.xml · derivative · entry 2

ELOI FENEL M · CIK 0001237190 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 7,777 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. This transaction represents the settlement of RSUs in shares of Common Stock on their scheduled vesting date.

F2 · derivative.exercise_date: The RSUs became fully vested on June 12, 2024, the day prior to the 2024 Annual Meeting of the Stockholders of 908 Devices Inc. The RSUs have no expiration date.

F2 · derivative.expiration_date: The RSUs became fully vested on June 12, 2024, the day prior to the 2024 Annual Meeting of the Stockholders of 908 Devices Inc. The RSUs have no expiration date.

SEC source: 0001562180-24-005061 · primarydocument.xml · nonDerivative · entry 1

ELOI FENEL M · CIK 0001237190 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,450

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

SEC source: 0001562180-24-005066 · primarydocument.xml · derivative · entry 3

CRANDELL KEITH · CIK 0001219039 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 7,777 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. This transaction represents the settlement of RSUs in shares of Common Stock on their scheduled vesting date.

F3 · derivative.exercise_date: The RSUs became fully vested on June 12, 2024, the day prior to the 2024 Annual Meeting of the Stockholders of 908 Devices Inc. The RSUs have no expiration date.

F3 · derivative.expiration_date: The RSUs became fully vested on June 12, 2024, the day prior to the 2024 Annual Meeting of the Stockholders of 908 Devices Inc. The RSUs have no expiration date.

SEC source: 0001562180-24-005066 · primarydocument.xml · nonDerivative · entry 1

CRANDELL KEITH · CIK 0001219039 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,927

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

SEC source: 0001562180-24-005064 · primarydocument.xml · derivative · entry 3

HRUSOVSKY E KEVIN · CIK 0001252546 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 7,777 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. This transaction represents the settlement of RSUs in shares of Common Stock on their scheduled vesting date.

F3 · derivative.exercise_date: The RSUs became fully vested on June 12, 2024, the day prior to the 2024 Annual Meeting of the Stockholders of 908 Devices Inc. The RSUs have no expiration date.

F3 · derivative.expiration_date: The RSUs became fully vested on June 12, 2024, the day prior to the 2024 Annual Meeting of the Stockholders of 908 Devices Inc. The RSUs have no expiration date.

SEC source: 0001562180-24-005064 · primarydocument.xml · nonDerivative · entry 1

HRUSOVSKY E KEVIN · CIK 0001252546 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 139,943

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

SEC source: 0001562180-24-005065 · primarydocument.xml · derivative · entry 3

Spoto Mark · CIK 0001836585 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 7,777 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. This transaction represents the settlement of RSUs in shares of Common Stock on their scheduled vesting date.

F3 · derivative.exercise_date: The RSUs became fully vested on June 12, 2024, the day prior to the 2024 Annual Meeting of the Stockholders of 908 Devices Inc. The RSUs have no expiration date.

F3 · derivative.expiration_date: The RSUs became fully vested on June 12, 2024, the day prior to the 2024 Annual Meeting of the Stockholders of 908 Devices Inc. The RSUs have no expiration date.

SEC source: 0001562180-24-005065 · primarydocument.xml · nonDerivative · entry 1

Spoto Mark · CIK 0001836585 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 52,971

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

SEC source: 0001562180-24-005063 · primarydocument.xml · derivative · entry 2

Hunt Anthony · CIK 0001606030 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 7,777 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. This transaction represents the settlement of RSUs in shares of Common Stock on their scheduled vesting date.

F2 · derivative.exercise_date: The RSUs became fully vested on June 12, 2024, the day prior to the 2024 Annual Meeting of the Stockholders of 908 Devices Inc. The RSUs have no expiration date.

F2 · derivative.expiration_date: The RSUs became fully vested on June 12, 2024, the day prior to the 2024 Annual Meeting of the Stockholders of 908 Devices Inc. The RSUs have no expiration date.

SEC source: 0001562180-24-005063 · primarydocument.xml · nonDerivative · entry 1

Hunt Anthony · CIK 0001606030 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,663

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

SEC source: 0001562180-24-005060 · primarydocument.xml · derivative · entry 2

Eisenberg Marcia · CIK 0001866723 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 7,777 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. This transaction represents the settlement of RSUs in shares of Common Stock on their scheduled vesting date.

F2 · derivative.exercise_date: The RSUs became fully vested on June 12, 2024, the day prior to the 2024 Annual Meeting of the Stockholders of 908 Devices Inc. The RSUs have no expiration date.

F2 · derivative.expiration_date: The RSUs became fully vested on June 12, 2024, the day prior to the 2024 Annual Meeting of the Stockholders of 908 Devices Inc. The RSUs have no expiration date.

SEC source: 0001562180-24-005060 · primarydocument.xml · nonDerivative · entry 1

Eisenberg Marcia · CIK 0001866723 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,593

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

SEC source: 0001562180-24-004888 · primarydocument.xml · derivative · entry 2

Eisenberg Marcia · CIK 0001866723 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 682 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.

F2 · derivative.exercise_date: The RSUs become vested in substantially equal annual installments over the 3 years following June 7, 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 June 7, 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: 0001562180-24-004888 · primarydocument.xml · nonDerivative · entry 1

Eisenberg Marcia · CIK 0001866723 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,816

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: 0001562180-24-003971 · 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: 508,981

F1 · kind: As a result of the reporting person's prior matchable purchases of Common Stock on May 7, 2024 with sales by the reporting person on February 1, 2024, the reporting person paid to 908 Devices Inc. the full amount of the profit realized in connection with such short-swing transactions. The purchases reported on this Form 4 were at prices that did not increase the short-swing profit, and thus no further disgorgement is owed to 908 Devices.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $5.89 to $6.70, 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: 0001562180-24-003963 · 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: 498,981

F1 · kind: As a result of the reporting person's prior matchable purchases of Common Stock on May 7, 2024 with sales by the reporting person on February 1, 2024, the reporting person paid to 908 Devices Inc. the full amount of the profit realized in connection with such short-swing transactions. The purchases reported on this Form 4 were at prices that did not increase the short-swing profit, and thus no further disgorgement is owed to 908 Devices.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $5.69 to $5.87, 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: 0001562180-24-003946 · 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: 488,981

F1 · kind: As a result of the reporting person's prior matchable purchases of Common Stock on May 7, 2024 with sales by the reporting person on February 1, 2024, the reporting person paid to 908 Devices Inc. the full amount of the profit realized in connection with such short-swing transactions. The purchases reported on this Form 4 were at prices that did not increase the short-swing profit, and thus no further disgorgement is owed to 908 Devices.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $5.73 to $5.94, 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: 0001562180-24-003921 · 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: 478,981

F1 · kind: As a result of the reporting person's prior matchable purchases of Common Stock on May 7, 2024 with sales by the reporting person on February 1, 2024, the reporting person paid to 908 Devices Inc. the full amount of the profit realized in connection with such short-swing transactions. The purchases reported on this Form 4 were at prices that did not increase the short-swing profit, and thus no further disgorgement is owed to 908 Devices.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $5.64 to $5.77, 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: 0001562180-24-003883 · 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: 468,981

F1 · kind: The reporting person's purchase of Common Stock reported herein was matchable under Section 16(b) of the Securities Exchange Act of 1934, to the extent of 9,071 shares, representing (i) the reporting person's sale of 4,099 shares of Common Stock at a price of $6.9716 per share on February 1, 2024, and (ii) the reporting person's sale of 4,972 shares of Common Stock at a price of $7.0161 per share on February 1, 2024. The reporting person has paid to 908 Devices Inc. an amount equal to $12,698.28, representing the full amount of the profit realized in connection with the short-swing transactions.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $5.57 to $5.70, 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: 0001562180-24-003426 · primarydocument.xml · derivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 47,418

Underlying: Common Stock · 94,418 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: 0001562180-24-003426 · 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: 458,981

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: 0001562180-24-003150 · primarydocument.xml · derivative · entry 2

Brown Christopher D. · CIK 0001836988 · Chief Product Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 114,318

Underlying: Common Stock · 117,918 shares

Expires 2027-06-22

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: 0001562180-24-003150 · primarydocument.xml · nonDerivative · entry 1

Brown Christopher D. · CIK 0001836988 · Chief Product Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 884,994

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 · balance_after: The number of securities reported in this column has been adjusted to reflect a prior option exercise and prior calculation error.

SEC source: 0001562180-24-003011 · primarydocument.xml · derivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,000

Underlying: Common Stock, par value $0.001 · 13,437 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: 0001562180-24-003011 · 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: 93,437

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: 0001562180-24-002324 · primarydocument.xml · derivative · entry 2

Hunt Anthony · CIK 0001606030 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,058

Underlying: Common Stock, par value $0.001 · 4,115 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 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.

F2 · 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: 0001562180-24-002324 · primarydocument.xml · nonDerivative · entry 1

Hunt Anthony · CIK 0001606030 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,886

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: 0001562180-24-002325 · primarydocument.xml · derivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 45,042

Underlying: Common Stock, par value $0.001 · 45,042 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 February 1, 2025, with the remaining 75% vesting in three substantially equal annual installments at the three anniversary dates following February 1, 2025, 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 February 1, 2025, with the remaining 75% vesting in three substantially equal annual installments at the three anniversary dates following February 1, 2025, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

SEC source: 0001562180-24-002325 · primarydocument.xml · derivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 61,535

Underlying: Common Stock, par value $0.001 · 61,535 shares

Expires 2034-02-28

F1 · derivative.exercise_date: Twenty-five percent of the shares underlying the option become vested and exercisable on February 1, 2025, and the remaining 75% of the shares underlying the option become vested and exercisable in substantially equal monthly installments over the 36 months following February 1, 2025, subject to the reporting person's continued service through the applicable vesting date.

SEC source: 0001562180-24-002326 · primarydocument.xml · derivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 43,334

Underlying: Common Stock, par value $0.001 · 43,334 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 February 1, 2025, with the remaining 75% vesting in three substantially equal annual installments at the three anniversary dates following February 1, 2025, 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 February 1, 2025, with the remaining 75% vesting in three substantially equal annual installments at the three anniversary dates following February 1, 2025, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

SEC source: 0001562180-24-002326 · primarydocument.xml · derivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 59,201

Underlying: Common Stock, par value $0.001 · 59,201 shares

Expires 2034-02-28

F1 · derivative.exercise_date: Twenty-five percent of the shares underlying the option become vested and exercisable on February 1, 2025, and the remaining 75% of the shares underlying the option become vested and exercisable in substantially equal monthly installments over the 36 months following February 1, 2025, subject to the reporting person's continued service through the applicable vesting date.

SEC source: 0001562180-24-002323 · primarydocument.xml · derivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 68,028

Underlying: Common Stock, par value $0.001 · 68,028 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 February 1, 2025, with the remaining 75% vesting in three substantially equal annual installments at the three anniversary dates following February 1, 2025, 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 February 1, 2025, with the remaining 75% vesting in three substantially equal annual installments at the three anniversary dates following February 1, 2025, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

SEC source: 0001562180-24-002323 · primarydocument.xml · derivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 92,937

Underlying: Common Stock, par value $0.001 · 92,937 shares

Expires 2034-02-28

F1 · derivative.exercise_date: Twenty-five percent of the shares underlying the option become vested and exercisable on February 1, 2025, and the remaining 75% of the shares underlying the option become vested and exercisable in substantially equal monthly installments over the 36 months following February 1, 2025, subject to the reporting person's continued service through the applicable vesting date.

SEC source: 0001562180-24-002322 · primarydocument.xml · derivative · entry 2

Brown Christopher D. · CIK 0001836988 · Chief Product Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 43,965

Underlying: Common Stock, par value $0.001 · 43,965 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 February 1, 2025, with the remaining 75% vesting in three substantially equal annual installments at the three anniversary dates following February 1, 2025, 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 February 1, 2025, with the remaining 75% vesting in three substantially equal annual installments at the three anniversary dates following February 1, 2025, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

SEC source: 0001562180-24-002322 · primarydocument.xml · derivative · entry 1

Brown Christopher D. · CIK 0001836988 · Chief Product Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 60,064

Underlying: Common Stock, par value $0.001 · 60,064 shares

Expires 2034-02-28

F1 · derivative.exercise_date: Twenty-five percent of the shares underlying the option become vested and exercisable on February 1, 2025, and the remaining 75% of the shares underlying the option become vested and exercisable in substantially equal monthly installments over the 36 months following February 1, 2025, subject to the reporting person's continued service through the applicable vesting date.

SEC source: 0001562180-24-001695 · primarydocument.xml · derivative · entry 2

George Jeffrey P. · CIK 0001796789 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock, par value $0.001 · 508 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: 0001562180-24-001695 · primarydocument.xml · nonDerivative · entry 1

George Jeffrey P. · CIK 0001796789 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,673

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: 0001562180-24-001694 · primarydocument.xml · derivative · entry 2

ELOI FENEL M · CIK 0001237190 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock, par value $0.001 · 508 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: 0001562180-24-001694 · primarydocument.xml · nonDerivative · entry 1

ELOI FENEL M · CIK 0001237190 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,673

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: 0001562180-24-001018 · primarydocument.xml · nonDerivative · entry 5

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 80,000

F5 · kind: Represents sales effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.91 to $7.29, 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: 0001562180-24-001018 · 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: 30,918

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.

F8 · 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.

F8 · 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: 0001562180-24-001018 · primarydocument.xml · derivative · entry 6

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,204

Underlying: Common Stock · 5,103 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, 2022, 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, 2022, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

SEC source: 0001562180-24-001018 · primarydocument.xml · nonDerivative · entry 4

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 89,711

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.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.95 to $7.07, 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: 0001562180-24-001018 · 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: 93,521

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 $6.95 to $7.08, 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: 0001562180-24-001018 · 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: 95,409

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: 0001562180-24-001018 · 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: 85,103

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: 0001562180-24-000998 · primarydocument.xml · derivative · entry 6

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,728

Underlying: Common Stock · 9,910 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, 2023, 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, 2023, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

SEC source: 0001562180-24-000998 · primarydocument.xml · derivative · entry 5

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,854

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.

F5 · 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.

F5 · 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.