E. KEVIN HRUSOVSKY - 11 Jun 2025 Form 4 Insider Report for 908 Devices Inc. (MASS)

Role
Director
Signature
/s/ Michael S. Turner, as Attorney-in-Fact
Issuer symbol
MASS
Transactions as of
11 Jun 2025
Transactions value $
$0
Form type
4
Filing time
13 Jun 2025, 16:21:34 UTC
Previous filing
14 Jun 2024
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
HRUSOVSKY E KEVIN Director C/O 908 DEVICES INC., 645 SUMMER STREET, BOSTON /s/ Michael S. Turner, as Attorney-in-Fact 13 Jun 2025 0001252546

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction MASS Common Stock Options Exercise +11.4K +8.12% 151K 11 Jun 2025 Direct F1
holding MASS Common Stock 330K 11 Jun 2025 See Footnote F2

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 Options Exercise $0 -11.4K -100% $0.00 0 11 Jun 2025 Common Stock 11.4K Direct F1, F3
transaction MASS Restricted Stock Units Award $0 +14.1K $0.00 14.1K 12 Jun 2025 Common Stock 14.1K Direct F4, F5
transaction MASS Stock Option (option to buy) Award $0 +6.52K $0.00 6.52K 12 Jun 2025 Common Stock 6.52K $7.19 Direct F6
* 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. This transaction represents the settlement of RSUs in shares of Common Stock on their scheduled vesting date.
F2 The securities are owned directly by the E. Kevin Hrusovsky 2012 Irrevocable Trust. The reporting person's spouse and children are trustees of E. Kevin Hrusovsky 2012 Irrevocable Trust and have joint voting and dispositive control with respect to all securities held by E. Kevin Hrusovsky 2012 Irrevocable Trust and the reporting person may be deemed to be the beneficial owner of the securities held by E. Kevin Hrusovsky 2012 Irrevocable Trust.
F3 The RSUs became fully vested on June 11, 2025, the day prior to the 2025 Annual Meeting of the Stockholders of 908 Devices Inc. The RSUs have no expiration date.
F4 Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of Common Stock, par value $0.001, when vested.
F5 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.
F6 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.