Quanterix Corp — Director's Dealing 2020

Nov 25, 2020

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Quanterix Corp (QTRX)
CIK: 0001503274
Period of Report: 2020-11-20

Reporting Person: ARCH VENTURE FUND VI LP (10% Owner)
Reporting Person: ARCH Venture Fund VIII Overage, L.P. (10% Owner)
Reporting Person: ARCH VENTURE PARTNERS VI LP (10% Owner)
Reporting Person: ARCH VENTURE PARTNERS VI LLC (10% Owner)
Reporting Person: ARCH Venture Partners VIII, LLC (10% Owner)
Reporting Person: BYBEE CLINTON (10% Owner)
Reporting Person: NELSEN ROBERT (10% Owner)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2020-11-20	Common Stock	J	229006	—	Disposed	2182995	Indirect
2020-11-20	Common Stock	J	145994	—	Disposed	1391690	Indirect
2020-11-20	Common Stock	J	854	—	Acquired	854	Direct
2020-11-20	Common Stock	J	853	—	Acquired	853	Direct
2020-11-24	Common Stock	J	277514	—	Disposed	1905481	Indirect
2020-11-24	Common Stock	J	176920	—	Disposed	1214770	Indirect
2020-11-24	Common Stock	J	1034	—	Acquired	1888	Direct
2020-11-24	Common Stock	J	1036	—	Acquired	1889	Direct

Footnotes

F1: Distribution of Common Stock held by a limited partnership to its partners for no consideration.

F2: These shares are directly held by ARCH Venture Fund VI, L.P. ("ARCH VI"). ARCH Venture Partners VI, L.P. ("GPLP"), the sole general partner of ARCH VI, may be deemed to beneficially own the shares held by ARCH VI. ARCH Venture Partners VI, LLC ("GPLLC"), as the sole general partner of GPLP, may be deemed to beneficially own the shares held by ARCH VI. As managing directors of GPLLC, each of Robert Nelsen and Clinton Bybee (the "ARCH Managing Directors"), may be deemed to beneficially own the shares held by ARCH VI. Each of GPLP, GPLLC and the ARCH Managing Directors disclaims beneficial ownership of the securities reported herein, except to the extent of their pecuniary interest therein, if any.

F3: The shares are held of record by ARCH Venture Fund VIII Overage, L.P. ("ARCH Fund Overage"). The sole general partner of ARCH Fund Overage is ARCH Venture Partners VIII, LLC ("ARCH VIII LLC"), which may be deemed to beneficially own the shares held by ARCH Fund Overage. ARCH VIII LLC disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein. As managing directors of ARCH VIII LLC, each of the ARCH Managing Directors may be deemed to beneficially own the shares held by ARCH Overage. Each of ARCH VIII LLC and the ARCH Managing Directors disclaims beneficial ownership of the securities reported herein, except to the extent of their pecuniary interest therein, if any.

F4: Change from indirect to direct ownership of shares previously reported as beneficially owned by the Reporting Person.

F5: Shares owned by Nelsen.

F6: Shares owned by Bybee.