John Kenneweg - 01 Dec 2021 Form 4 Insider Report for 908 Devices Inc. (MASS)

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	Stock Option (option to buy)	Award	$0	+8,702		$0.000000	8,702	01 Dec 2021	Common Stock, par value $0.001	8,702	$24.00	Direct	F1
transaction	MASS	Restricted Stock Unit	Award	$0	+5,209		$0.000000	5,209	01 Dec 2021	Common Stock, par value $0.001	5,209		Direct	F2, F3

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Id	Content
F1	Twenty-five percent of the shares underlying the option become vested and exercisable on December 1, 2022, and the remaining 75% of the shares underlying the option become vested and exercisable in substantially equal monthly installments over the 36 months following December 1, 2022, subject to the reporting person's continued service through the applicable vesting date.
F2	Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of Common Stock, par value $0.001, when vested.
F3	The RSUs shall vest 25% on December 1, 2022, with the remaining 75% vesting in three substantially equal annual installments at the three anniversary dates following December 1, 2022, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.