Mark S. Levine - 26 Feb 2026 Form 3 Insider Report for 908 Devices Inc. (MASS)

Role
Chief Legal and Admin. Officer
Signature
/s/ Mark S. Levine
Issuer symbol
MASS
Transactions as of
26 Feb 2026
Net transactions value
$0
Form type
3
Filing time
05 Mar 2026, 16:52:31 UTC
Previous filing
22 Nov 2024
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Levine Mark S. Chief Legal and Admin. Officer C/O 908 DEVICES INC., 44 3RD AVENUE, BURLINGTON /s/ Mark S. Levine 05 Mar 2026 0001617236

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
holding MASS Stock Option (right to buy) 26 Feb 2026 Common Stock 130,468 $6.68 Direct F1
holding MASS Restricted Stock Units 26 Feb 2026 Common Stock 98,242 Direct F2, F3
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 One-third of the shares underlying the option become vested and exercisable on January 1, 2027, and the remaining two-thirds of the shares underlying the option become vested and exercisable in substantially equal monthly installments over the 24 months following January 1, 2027, subject to the reporting person's continued service through the applicable vesting date.
F2 These restricted stock units ("RSUs") vest in three substantially equal annual installments at the three anniversary dates following January 1, 2026, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.
F3 Each RSU represents a contingent right to receive one share of Common Stock, par value $0.001, when vested.