Marcia Eisenberg - 11 Jun 2025 Form 4 Insider Report for 908 Devices Inc. (MASS)

Reporting relationship: Director
Issuer ticker: MASS
Reported as of: 11 Jun 2025
Net transaction value: $0
SEC form: 4
Accepted by SEC: 13 Jun 2025, 16:19:17 UTC
Prior SEC filing: 25 Feb 2025
Source filing: View source filing
Reporting owner signature: /s/ Michael S. Turner, as Attorney-in-Fact

Key filing fact

Marcia Eisenberg filed Form 4 for 908 Devices Inc. (MASS) on 13 Jun 2025.

Key facts

This page summarizes Marcia Eisenberg's Form 4 filing for 908 Devices Inc. (MASS).
2 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 13 Jun 2025, 16:19.

Change

Previous filing in this sequence was filed on 25 Feb 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001866723 Primary reporting owner

Eisenberg Marcia

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

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

MASS transaction

Common Stock

Options Exercise

Transaction value
Shares: +11,364
Change %: +78%
Price
Shares after: 25,957
Date: 11 Jun 2025
Ownership: Direct
Footnotes: F1

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

MASS transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value: $0
Shares: -11,364
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 11 Jun 2025
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 11,364
Exercise price
Footnotes: F1, F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote 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.

Footnote F2

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.