Key facts
- This page summarizes Joseph H. Griffith IV's Form 4 filing for 908 Devices Inc. (MASS).
- 11 reported transactions and 6 derivative rows are listed below.
- Accepted by SEC: 03 Feb 2026, 20:45.
Joseph H. Griffith IV - 01 Feb 2026 Form 4 Insider Report for 908 Devices Inc. (MASS)
- Reporting relationship
- Chief Financial Officer
- Issuer ticker
- MASS
- Reported as of
- 01 Feb 2026
- Net transaction value
- -$143,222
- SEC form
- 4
- Accepted by SEC
- 03 Feb 2026, 20:45:22 UTC
- Prior SEC filing
- 06 Oct 2025
- Next SEC filing
- 29 May 2026
- Source filing
- View source filing
- Reporting owner signature
- /s/ Mark S. Levine, Attorney-in-Fact
Source evidence
Original filing metadata and source links for verification.
5 source fields
Reporting owner
1 detail
Key filing fact
Joseph H. Griffith IV filed Form 4 for 908 Devices Inc. (MASS) on 03 Feb 2026.
Change
- Previous filing in this sequence was filed on 06 Oct 2025.
- Current net transaction value: -$143,222.
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
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reporting Owners (1)
CIK 0001431531
Primary reporting owner
Griffith Joseph H. IV
- Relationship
- Chief Financial Officer
- Address
- C/O 908 DEVICES INC., 44 3RD AVENUE, BURLINGTON
- Signature
- /s/ Mark S. Levine, Attorney-in-Fact
- Signature date
- 03 Feb 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
MASS
transaction
Common Stock
Options Exercise
- Transaction value
- Shares
- +5,102
- Change %
- +5.5%
- Price
- Shares after
- 98,032
- Date
- 01 Feb 2026
- Ownership
- Direct
- Footnotes
- F1
MASS
transaction
Common Stock
Options Exercise
- Transaction value
- Shares
- +10,306
- Change %
- +11%
- Price
- Shares after
- 108,338
- Date
- 01 Feb 2026
- Ownership
- Direct
- Footnotes
- F1
MASS
transaction
Common Stock
Options Exercise
- Transaction value
- Shares
- +11,260
- Change %
- +10%
- Price
- Shares after
- 119,598
- Date
- 01 Feb 2026
- Ownership
- Direct
- Footnotes
- F1
MASS
transaction
Common Stock
Options Exercise
- Transaction value
- Shares
- +43,473
- Change %
- +36%
- Price
- Shares after
- 163,071
- Date
- 01 Feb 2026
- Ownership
- Direct
- Footnotes
- F1
MASS
transaction
Common Stock
Sale
- Transaction value
- $143,222
- Shares
- -23,175
- Change %
- -14%
- Price
- $6.18
- Shares after
- 139,896
- Date
- 02 Feb 2026
- Ownership
- Direct
- Footnotes
- F2, F3
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
- -5,102
- Change %
- -100%
- Price
- $0.000000
- Shares after
- 0
- Date
- 01 Feb 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 5,102
- Exercise price
- Footnotes
- F1, F4
MASS
transaction
Derivative
Restricted Stock Units
Options Exercise
- Transaction value
- $0
- Shares
- -10,306
- Change %
- -50%
- Price
- $0.000000
- Shares after
- 10,306
- Date
- 01 Feb 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 10,306
- Exercise price
- Footnotes
- F1, F5
MASS
transaction
Derivative
Restricted Stock Units
Options Exercise
- Transaction value
- $0
- Shares
- -11,260
- Change %
- -33%
- Price
- $0.000000
- Shares after
- 22,521
- Date
- 01 Feb 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 11,260
- Exercise price
- Footnotes
- F1, F6
MASS
transaction
Derivative
Restricted Stock Units
Options Exercise
- Transaction value
- $0
- Shares
- -43,473
- Change %
- -33%
- Price
- $0.000000
- Shares after
- 86,945
- Date
- 01 Feb 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 43,473
- Exercise price
- Footnotes
- F1, F7
MASS
transaction
Derivative
Restricted Stock Units
Award
- Transaction value
- $0
- Shares
- +121,164
- Change %
- Price
- $0.000000
- Shares after
- 121,164
- Date
- 02 Feb 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 121,164
- Exercise price
- Footnotes
- F1, F8
MASS
transaction
Derivative
Stock Option (option to buy)
Award
- Transaction value
- $0
- Shares
- +52,967
- Change %
- Price
- $0.000000
- Shares after
- 52,967
- Date
- 02 Feb 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 52,967
- Exercise price
- $6.19
- Footnotes
- F9
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 9 footnotes
Footnote F1
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.
Footnote F2
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.
Footnote F3
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.105 to $6.35, inclusive. The reporting person undertakes to provide to Issuer, any security holder of Issuer, 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.
Footnote F4
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.
Footnote F5
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.
Footnote F6
These RSUs vest in four substantially equal annual installments at the four anniversary dates following February 1, 2024, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.
Footnote F7
The RSUs shall vest one-third on February 1, 2026, with the remaining two-thirds vesting in two substantially equal annual installments at the two anniversary dates following February 1, 2026, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.
Footnote F8
The RSUs shall vest one-third on February 1, 2027, with the remaining two-thirds vesting in two substantially equal annual installments at the two anniversary dates following February 1, 2027, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.
Footnote F9
One-third of the shares underlying the option become vested and exercisable on February 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 February 1, 2027, subject to the reporting person's continued service through the applicable vesting date.