E Kevin Hrusovsky

Date	Company	Security	Transaction	Code	Indirect	10b5-1	$Price	#Shares	$Value	#Remaining
19 Dec 22	MASS 908 Devices	Common Stock	Gift	Acquire G	Yes	No	0	193,176	0.00	329,675
19 Dec 22	MASS 908 Devices	Common Stock	Gift	Dispose G	No	No	0	193,176	0.00	127,395
21 Nov 22	MASS 908 Devices	Common Stock, par value $0.001	Option exercise	Acquire M	No	No	0.35	76,016	26.61 k	320,571
21 Nov 22	MASS 908 Devices	Stock Option (option to buy) Common Stock, par value $0.001	Option exercise	Dispose M	No	No	0.35	76,016	26.61 k	0
5 Jul 22	QTRX Quanterix	Common Stock	Sell	Dispose S	No	No	16.5689	960	15.91 k	910,249
16 Jun 22	MASS 908 Devices	Stock Option (option to buy) Common Stock, par value $0.001	Grant	Acquire A	No	No	14.15	7,970	112.78 k	7,970
16 Jun 22	MASS 908 Devices	RSU Common Stock, par value $0.001	Grant	Acquire A	No	No	0	4,771	0.00	4,771
15 Jun 22	MASS 908 Devices	Common Stock, par value $0.001	Option exercise	Acquire M	No	No	0	1,379	0.00	244,555
15 Jun 22	MASS 908 Devices	RSU Common Stock, par value $0.001	Option exercise	Dispose M	No	No	0	1,379	0.00	0
2 Jun 22	QTRX Quanterix	Common Stock	Sell	Dispose S	No	No	17.4736	712	12.44 k	911,209

Data from 3, 4 and 5 filings. Values as filed, not updated for current price.