Trent A. Basarsky - 12 Jul 2021 Form 4 Insider Report for 908 Devices Inc. (MASS)

Role: VP, Corporate Development
Signature: /s/ Michael S. Turner, as Attorney-in-Fact
Issuer symbol: MASS
Transactions as of: 12 Jul 2021
Net transactions value: +$52,500
Form type: 4
Filing time: 14 Jul 2021, 17:16:04 UTC
Previous filing: 23 Jul 2021
Next filing: 27 Jul 2021
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	MASS	Common Stock, par value $0.001	Options Exercise	$52,500	+30,000	+600%	$1.75^*	35,000	12 Jul 2021	Direct

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)	Options Exercise	$0	-30,000	-17%	$0.000000	144,504	12 Jul 2021	Common Stock, par value $0.001	174,504	$1.75	Direct	F1

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

Explanation of Responses:

Id	Content
F1	Twenty-five percent of the shares underlying the option became vested and exercisable on January 8, 2018 and the remaining 75% of the shares underlying the option become vested and exercisable in substantially equal monthly installments over the 36 months following January 8, 2018, subject to the reporting person's continued service through the applicable vesting date.