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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1503274	Quanterix Corp	QTRX	()	4

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1205236	R David Walt	C/O Quanterix Corporation, 113 Hartwell Avenue Lexington MA 02421		Yes	No	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Common Stock	Acquisiton	2017-12-11	32,959	$0.00	429,660	No	4	C	Direct
Common Stock	Acquisiton	2017-12-11	86,517	$0.00	516,177	No	4	C	Direct
Common Stock	Acquisiton	2017-12-11	334,985	$0.00	851,162	No	4	C	Direct
Common Stock	Acquisiton	2017-12-11	28,691	$0.00	879,853	No	4	C	Direct
Common Stock	Acquisiton	2017-12-11	135,647	$0.00	1,015,500	No	4	C	Direct
Common Stock	Acquisiton	2017-12-11	200,000	$15.00	1,215,500	No	4	P	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	C	Direct
No	4	C	Direct
No	4	C	Direct
No	4	C	Direct
No	4	C	Direct
No	4	P	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Series A-1 Preferred Stock	Disposition	2017-12-11	105,931	$0.00	32,959	$0.00
Common Stock	Series A-2 Preferred Stock	Disposition	2017-12-11	278,068	$0.00	86,517	$0.00
Common Stock	Series B Preferred Stock	Disposition	2017-12-11	1,076,642	$0.00	334,985	$0.00
Series C Preferred Stock	Warrant to Purchase Series C Preferred Stock (right to buy)	Disposition	2017-11-29	4,327	$0.00	4,327	$3.33
Common Stock	Series C Preferred Stock	Acquisiton	2017-11-29	4,327	$0.00	1,346	$0.00
Series C Preferred Stock	Warrant to Purchase Series C Preferred Stock (right to buy)	Disposition	2017-11-29	3,060	$0.00	3,060	$3.33
Common Stock	Series C Preferred Stock	Acquisiton	2017-11-29	3,060	$0.00	952	$0.00
Series C Preferred Stock	Warrant to Purchase Series C Preferred Stock (right to buy)	Disposition	2017-11-29	707	$0.00	707	$3.33
Common Stock	Series C Preferred Stock	Acquisiton	2017-11-29	707	$0.00	219	$0.00
Common Stock	Series C Preferred Stock	Disposition	2017-12-11	92,215	$0.00	28,691	$0.00
Common Stock	Series D Preferred Stock	Disposition	2017-12-11	435,967	$0.00	135,647	$0.00

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0			No	4	C	Direct
0			No	4	C	Direct
0			No	4	C	Direct
3,767	2012-03-01	2017-11-30	No	4	X	Direct
88,448			No	4	X	Direct
707	2012-07-30	2017-11-30	No	4	X	Direct
91,508			No	4	X	Direct
0	2012-11-05	2017-11-30	No	4	X	Direct
92,215			No	4	X	Direct
0			No	4	C	Direct
0			No	4	C	Direct

Footnotes

The shares of preferred stock automatically converted into common stock immediately prior to the closing of the Issuer's initial public offering using a calculation defined in the Issuer's Restated Certificate of Incorporation, as amended, based on the initial purchase price and the conversion rate in effect at the time of conversion. The shares of preferred stock automatically converted on a 1-for-3.214 basis and such conversion rate is reflected in the amount of common stock underlying the security.
Reflects shares purchased in the Issuer's initial public offering.
These shares were convertible into the Issuer's common stock in accordance with the Issuer's Restated Certificate of Incorporation, as amended, at any time after the issuance of such shares, at the holder's election.
Not applicable.
This transaction, which occurred prior to the Issuer's initial public offering of Common Stock, is being reported as required by Rule 16a-2(a) under the Securities Exchange Act of 1934, as amended.
Reflects the exercise of warrants to purchase Series C preferred stock on a cash basis at an exercise price of $3.3299 per share.