Michele M. Leonhart - Jun 12, 2025 Form 4 Insider Report for 908 Devices Inc. (MASS)

Role
Director
Signature
/s/ Michael S. Turner, as Attorney-in-Fact
Stock symbol
MASS
Transactions as of
Jun 12, 2025
Transactions value $
$0
Form type
4
Date filed
6/13/2025, 04:22 PM
Previous filing
Jun 26, 2024
Next filing
Jun 27, 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Leonhart Michele M. Director C/O 908 DEVICES INC., 645 SUMMER STREET, BOSTON /s/ Michael S. Turner, as Attorney-in-Fact 2025-06-13 0002027457

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction MASS Restricted Stock Units Award $0 +14.1K $0.00 14.1K Jun 12, 2025 Common Stock 14.1K Direct F1, F2
transaction MASS Stock Option (option to buy) Award $0 +6.52K $0.00 6.52K Jun 12, 2025 Common Stock 6.52K $7.19 Direct F3
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of Common Stock, par value $0.001, when vested.
F2 The RSUs become fully vested on June 12, 2026 or the day prior to the 2026 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.
F3 The shares underlying the option become vested and exercisable in substantially equal monthly installments over the 12 months following June 12, 2025, subject to the reporting person's continued service through the applicable vesting date.