Maura Fitzpatrick - Feb 1, 2023 Form 4 Insider Report for 908 Devices Inc. (MASS)

Role: VP, Product Management & Mktg
Signature: /s/ Michael S. Turner, as Attorney-in-Fact
Stock symbol: MASS
Transactions as of: Feb 1, 2023
Transactions value $: -$14,656
Form type: 4
Date filed: 2/3/2023, 04:15 PM
Previous filing: May 9, 2022

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	MASS	Common Stock	Options Exercise		+4.43K			4.43K	Feb 1, 2023	Direct	F1
transaction	MASS	Common Stock	Sale	-$14.7K	-1.59K	-35.98%	$9.20	2.83K	Feb 1, 2023	Direct	F2, F3

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 Unit	Options Exercise	$0	-4.43K	-25%	$0.00	13.3K	Feb 1, 2023	Common Stock	4.43K		Direct	F1, F4

* 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, at settlement, one share of Common Stock. This transaction represents the settlement of RSUs in shares of Common Stock on their scheduled vesting date.
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.
F3	The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $9.01 to $9.63, inclusive. The reporting person undertakes to provide to 908 Devices Inc., any security holder of 908 Devices Inc., 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.
F4	The 4,427 RSUs vested on February 1, 2023, with the remaining 13,281 RSUs vesting in three substantially equal annual installments at the three 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.