Trent A. Basarsky - Jul 23, 2021 Form 4 Insider Report for 908 Devices Inc. (MASS)

Role: VP, Corporate Development
Signature: /s/ Michael S. Turner, as Attorney-in-Fact
Stock symbol: MASS
Transactions as of: Jul 23, 2021
Transactions value $: -$640,581
Form type: 4
Date filed: 7/27/2021, 09:02 PM
Previous filing: Jul 14, 2021
Next filing: Aug 25, 2021

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	MASS	Common Stock	Options Exercise	$21K	+12K	+34.29%	$1.75^*	47K	Jul 23, 2021	Direct
transaction	MASS	Common Stock	Options Exercise	$5.25K	+3K	+6.38%	$1.75^*	50K	Jul 23, 2021	Direct
transaction	MASS	Common Stock	Options Exercise	$10.5K	+6K	+12%	$1.75^*	56K	Jul 23, 2021	Direct
transaction	MASS	Common Stock	Sale	-$227K	-7.11K	-12.69%	$31.89	48.9K	Jul 23, 2021	Direct	F1, F2
transaction	MASS	Common Stock	Sale	-$451K	-13.9K	-28.42%	$32.44	35K	Jul 23, 2021	Direct	F1, 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	Stock Option (Right to Buy)	Options Exercise	$0	-12K	-8.3%	$0.00	133K	Jul 23, 2021	Common Stock	145K	$1.75	Direct	F4
transaction	MASS	Stock Option (Right to Buy)	Options Exercise	$0	-3K	-2.26%	$0.00	130K	Jul 23, 2021	Common Stock	3K	$1.75	Direct	F4
transaction	MASS	Stock Option (Right to Buy)	Options Exercise	$0	-6K	-4.63%	$0.00	124K	Jul 23, 2021	Common Stock	6K	$1.75	Direct	F4

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

Explanation of Responses:

Id	Content
F1	Represents sales effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.
F2	The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $31.19 to $32.18, 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.
F3	The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $32.19 to $32.83, 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	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.