organization · Reporting owner

ARCH VENTURE PARTNERS VI LP

Disclosed activity across 2 companies

Tapewire entity: 145091
SEC CIK: 0001274410

Reported relationships

Latest disclosed role at each company.

Company	Last reported as	Report date	Published
XTERA COMMUNICATIONS, INC.XCOM · Entity 181654	10% owner	October 11, 2016	October 13, 2016

Disclosed balances

About these balances

Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

XTERA COMMUNICATIONS, INC.

Report date October 11, 2016 · Filed October 13, 2016

Jointly reported with ARCH VENTURE FUND VI LP, ARCH VENTURE PARTNERS VI LLC, CRANDELL KEITH, NELSEN ROBERT

Security / award	Ownership account	Disclosed shares / units	Disclosure context
Warrants to Purchase Common StockSEC Table II · derivative / convertible security · Conversion / exercise price $0.61 · Expires 2026-10-11	IndirectSee Footnote	500,167	Reported balance After 2016-10-11 transaction · row 1 Instrument identity requires review; Table II rows are not merged. 1 source row Row 1 · 2016-10-11 · Purchase · Acquired 83,500 · Balance 500,167 F1: The Warrants reported on this Form 4 were issued by Xtera Communications, Inc. (the "Company") as part of a private placement of secured promissory notes (the "Notes"). Each purchaser of Notes received warrants to purchase one share of the Company's Common Stock for each $1.00 of principal amount of Notes purchased F2: The Warrants are held of record by ARCH Venture Fund VI, L.P. ("ARCH Fund VI"). The sole general partner of ARCH Fund VI is ARCH Venture Partners VI, L.P. ("ARCH Partners VI"), which may be deemed to beneficially own the shares held by ARCH Fund VI. The sole general partner of ARCH Partners VI is ARCH Venture Partners VI, LLC ("ARCH VI LLC"), which may be deemed to beneficially own the shares held by ARCH Fund VI. ARCH Partners VI and ARCH VI LLC disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein. The managing directors of ARCH VI LLC are Clinton Bybee, Keith Crandell and Robert Nelsen, and as such they may be deemed to have shared voting and investment power over the shares held by ARCH Fund VI. Mr. Bybee is a member of the Company's board of directors. Messrs. Bybee, Crandell and Nelsen disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

Filing footnotes · ownership attribution and instrument terms

F1: The Warrants reported on this Form 4 were issued by Xtera Communications, Inc. (the "Company") as part of a private placement of secured promissory notes (the "Notes"). Each purchaser of Notes received warrants to purchase one share of the Company's Common Stock for each $1.00 of principal amount of Notes purchased

F2: The Warrants are held of record by ARCH Venture Fund VI, L.P. ("ARCH Fund VI"). The sole general partner of ARCH Fund VI is ARCH Venture Partners VI, L.P. ("ARCH Partners VI"), which may be deemed to beneficially own the shares held by ARCH Fund VI. The sole general partner of ARCH Partners VI is ARCH Venture Partners VI, LLC ("ARCH VI LLC"), which may be deemed to beneficially own the shares held by ARCH Fund VI. ARCH Partners VI and ARCH VI LLC disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein. The managing directors of ARCH VI LLC are Clinton Bybee, Keith Crandell and Robert Nelsen, and as such they may be deemed to have shared voting and investment power over the shares held by ARCH Fund VI. Mr. Bybee is a member of the Company's board of directors. Messrs. Bybee, Crandell and Nelsen disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

Past disclosures · reporting ended (1)

No longer tracked through insider filings. These historical balances do not imply present ownership or a zero position.

Quanterix Corp

Report date November 20, 2020 · Filed November 24, 2020

Jointly reported with ARCH VENTURE FUND VI LP, ARCH Venture Fund VIII Overage, L.P., ARCH VENTURE PARTNERS VI LLC, ARCH Venture Partners VIII, LLC, BYBEE CLINTON, NELSEN ROBERT

Section 16 reporting ended · disclosed 2020-11-24. Current position is not established by this disclosure.

Security / award	Ownership account	Disclosed shares / units	Disclosure context
Common StockSEC Table I · non-derivative	IndirectSee Footnote	2,182,995	Reported balance After 2020-11-20 transaction · row 1 Joint disclosure: continuity of the reported position is unresolved; see ownership footnotes. 1 source row Row 1 · 2020-11-20 · Other · Disposed 229,006 · Balance 2,182,995 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.
Common StockSEC Table I · non-derivative	IndirectSee Footnote	1,391,690	Reported balance After 2020-11-20 transaction · row 2 Joint disclosure: continuity of the reported position is unresolved; see ownership footnotes. 1 source row Row 2 · 2020-11-20 · Other · Disposed 145,994 · Balance 1,391,690 F1: Distribution of Common Stock held by a limited partnership to its partners for no consideration. 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.
Common StockSEC Table I · non-derivative	IndirectSee Footnote	1,905,481	Reported balance After 2020-11-24 transaction · row 5 Joint disclosure: continuity of the reported position is unresolved; see ownership footnotes. 1 source row Row 5 · 2020-11-24 · Other · Disposed 277,514 · Balance 1,905,481 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.
Common StockSEC Table I · non-derivative	IndirectSee Footnote	1,214,770	Reported balance After 2020-11-24 transaction · row 6 Joint disclosure: continuity of the reported position is unresolved; see ownership footnotes. 1 source row Row 6 · 2020-11-24 · Other · Disposed 176,920 · Balance 1,214,770 F1: Distribution of Common Stock held by a limited partnership to its partners for no consideration. 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.
Common StockSEC Table I · non-derivative	Direct	854	Reported balance After 2020-11-20 transaction · row 3 Joint disclosure: continuity of the reported position is unresolved; see ownership footnotes. 1 source row Row 3 · 2020-11-20 · Other · Acquired 854 · Balance 854 F1: Distribution of Common Stock held by a limited partnership to its partners for no consideration. F4: Change from indirect to direct ownership of shares previously reported as beneficially owned by the Reporting Person. F5: Shares owned by Nelsen.
Common StockSEC Table I · non-derivative	Direct	853	Reported balance After 2020-11-20 transaction · row 4 Joint disclosure: continuity of the reported position is unresolved; see ownership footnotes. 1 source row Row 4 · 2020-11-20 · Other · Acquired 853 · Balance 853 F1: Distribution of Common Stock held by a limited partnership to its partners for no consideration. F4: Change from indirect to direct ownership of shares previously reported as beneficially owned by the Reporting Person. F6: Shares owned by Bybee.
Common StockSEC Table I · non-derivative	Direct	1,888	Reported balance After 2020-11-24 transaction · row 7 Joint disclosure: continuity of the reported position is unresolved; see ownership footnotes. 1 source row Row 7 · 2020-11-24 · Other · Acquired 1,034 · Balance 1,888 F1: Distribution of Common Stock held by a limited partnership to its partners for no consideration. F4: Change from indirect to direct ownership of shares previously reported as beneficially owned by the Reporting Person. F5: Shares owned by Nelsen.
Common StockSEC Table I · non-derivative	Direct	1,889	Reported balance After 2020-11-24 transaction · row 8 Joint disclosure: continuity of the reported position is unresolved; see ownership footnotes. 1 source row Row 8 · 2020-11-24 · Other · Acquired 1,036 · Balance 1,889 F1: Distribution of Common Stock held by a limited partnership to its partners for no consideration. F4: Change from indirect to direct ownership of shares previously reported as beneficially owned by the Reporting Person. F6: Shares owned by Bybee.

Filing footnotes · ownership attribution and instrument terms

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.

Transaction history

JSON API

Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction date	Company	Activity / security	Shares / units	Reported price	Reported value	Details
November 24, 2020 Filed Nov 24, 2020 20:59 UTC	Quanterix Corp QTRX · Entity 6649	OtherCommon Stock	1,036	$0.00	$0.00	Disclosure SEC source: 0001062993-20-005886 · form4.xml · nonDerivative · entry 8 ARCH VENTURE FUND VI LP · CIK 0001222135 · 10% owner ARCH Venture Fund VIII Overage, L.P. · CIK 0001617237 · 10% owner ARCH VENTURE PARTNERS VI LP · CIK 0001274410 · 10% owner ARCH VENTURE PARTNERS VI LLC · CIK 0001274412 · 10% owner ARCH Venture Partners VIII, LLC · CIK 0001616165 · 10% owner BYBEE CLINTON · CIK 0001219043 · 10% owner NELSEN ROBERT · CIK 0001219042 · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 1,889 F1 · kind: Distribution of Common Stock held by a limited partnership to its partners for no consideration. F4 · kind: Change from indirect to direct ownership of shares previously reported as beneficially owned by the Reporting Person. F6 · ownership.direct: Shares owned by Bybee. Read SEC document
November 24, 2020 Filed Nov 24, 2020 20:59 UTC	Quanterix Corp QTRX · Entity 6649	OtherCommon Stock	1,034	$0.00	$0.00	Disclosure SEC source: 0001062993-20-005886 · form4.xml · nonDerivative · entry 7 ARCH VENTURE FUND VI LP · CIK 0001222135 · 10% owner ARCH Venture Fund VIII Overage, L.P. · CIK 0001617237 · 10% owner ARCH VENTURE PARTNERS VI LP · CIK 0001274410 · 10% owner ARCH VENTURE PARTNERS VI LLC · CIK 0001274412 · 10% owner ARCH Venture Partners VIII, LLC · CIK 0001616165 · 10% owner BYBEE CLINTON · CIK 0001219043 · 10% owner NELSEN ROBERT · CIK 0001219042 · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 1,888 F1 · kind: Distribution of Common Stock held by a limited partnership to its partners for no consideration. F4 · kind: Change from indirect to direct ownership of shares previously reported as beneficially owned by the Reporting Person. F5 · ownership.direct: Shares owned by Nelsen. Read SEC document
November 24, 2020 Filed Nov 24, 2020 20:59 UTC	Quanterix Corp QTRX · Entity 6649	OtherCommon Stock	176,920	$0.00	$0.00	Disclosure SEC source: 0001062993-20-005886 · form4.xml · nonDerivative · entry 6 ARCH VENTURE FUND VI LP · CIK 0001222135 · 10% owner ARCH Venture Fund VIII Overage, L.P. · CIK 0001617237 · 10% owner ARCH VENTURE PARTNERS VI LP · CIK 0001274410 · 10% owner ARCH VENTURE PARTNERS VI LLC · CIK 0001274412 · 10% owner ARCH Venture Partners VIII, LLC · CIK 0001616165 · 10% owner BYBEE CLINTON · CIK 0001219043 · 10% owner NELSEN ROBERT · CIK 0001219042 · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Indirect · See Footnote Disclosed balance after: 1,214,770 F1 · kind: Distribution of Common Stock held by a limited partnership to its partners for no consideration. F3 · ownership.nature: 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. Read SEC document
November 24, 2020 Filed Nov 24, 2020 20:59 UTC	Quanterix Corp QTRX · Entity 6649	OtherCommon Stock	277,514	$0.00	$0.00	Disclosure SEC source: 0001062993-20-005886 · form4.xml · nonDerivative · entry 5 ARCH VENTURE FUND VI LP · CIK 0001222135 · 10% owner ARCH Venture Fund VIII Overage, L.P. · CIK 0001617237 · 10% owner ARCH VENTURE PARTNERS VI LP · CIK 0001274410 · 10% owner ARCH VENTURE PARTNERS VI LLC · CIK 0001274412 · 10% owner ARCH Venture Partners VIII, LLC · CIK 0001616165 · 10% owner BYBEE CLINTON · CIK 0001219043 · 10% owner NELSEN ROBERT · CIK 0001219042 · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Indirect · See Footnote Disclosed balance after: 1,905,481 F1 · kind: Distribution of Common Stock held by a limited partnership to its partners for no consideration. F2 · ownership.nature: 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. Read SEC document
November 20, 2020 Filed Nov 24, 2020 20:59 UTC	Quanterix Corp QTRX · Entity 6649	OtherCommon Stock	853	$0.00	$0.00	Disclosure SEC source: 0001062993-20-005886 · form4.xml · nonDerivative · entry 4 ARCH VENTURE FUND VI LP · CIK 0001222135 · 10% owner ARCH Venture Fund VIII Overage, L.P. · CIK 0001617237 · 10% owner ARCH VENTURE PARTNERS VI LP · CIK 0001274410 · 10% owner ARCH VENTURE PARTNERS VI LLC · CIK 0001274412 · 10% owner ARCH Venture Partners VIII, LLC · CIK 0001616165 · 10% owner BYBEE CLINTON · CIK 0001219043 · 10% owner NELSEN ROBERT · CIK 0001219042 · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 853 F1 · kind: Distribution of Common Stock held by a limited partnership to its partners for no consideration. F4 · kind: Change from indirect to direct ownership of shares previously reported as beneficially owned by the Reporting Person. F6 · ownership.direct: Shares owned by Bybee. Read SEC document
November 20, 2020 Filed Nov 24, 2020 20:59 UTC	Quanterix Corp QTRX · Entity 6649	OtherCommon Stock	854	$0.00	$0.00	Disclosure SEC source: 0001062993-20-005886 · form4.xml · nonDerivative · entry 3 ARCH VENTURE FUND VI LP · CIK 0001222135 · 10% owner ARCH Venture Fund VIII Overage, L.P. · CIK 0001617237 · 10% owner ARCH VENTURE PARTNERS VI LP · CIK 0001274410 · 10% owner ARCH VENTURE PARTNERS VI LLC · CIK 0001274412 · 10% owner ARCH Venture Partners VIII, LLC · CIK 0001616165 · 10% owner BYBEE CLINTON · CIK 0001219043 · 10% owner NELSEN ROBERT · CIK 0001219042 · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 854 F1 · kind: Distribution of Common Stock held by a limited partnership to its partners for no consideration. F4 · kind: Change from indirect to direct ownership of shares previously reported as beneficially owned by the Reporting Person. F5 · ownership.direct: Shares owned by Nelsen. Read SEC document
November 20, 2020 Filed Nov 24, 2020 20:59 UTC	Quanterix Corp QTRX · Entity 6649	OtherCommon Stock	145,994	$0.00	$0.00	Disclosure SEC source: 0001062993-20-005886 · form4.xml · nonDerivative · entry 2 ARCH VENTURE FUND VI LP · CIK 0001222135 · 10% owner ARCH Venture Fund VIII Overage, L.P. · CIK 0001617237 · 10% owner ARCH VENTURE PARTNERS VI LP · CIK 0001274410 · 10% owner ARCH VENTURE PARTNERS VI LLC · CIK 0001274412 · 10% owner ARCH Venture Partners VIII, LLC · CIK 0001616165 · 10% owner BYBEE CLINTON · CIK 0001219043 · 10% owner NELSEN ROBERT · CIK 0001219042 · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Indirect · See Footnote Disclosed balance after: 1,391,690 F1 · kind: Distribution of Common Stock held by a limited partnership to its partners for no consideration. F3 · ownership.nature: 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. Read SEC document
November 20, 2020 Filed Nov 24, 2020 20:59 UTC	Quanterix Corp QTRX · Entity 6649	OtherCommon Stock	229,006	$0.00	$0.00	Disclosure SEC source: 0001062993-20-005886 · form4.xml · nonDerivative · entry 1 ARCH VENTURE FUND VI LP · CIK 0001222135 · 10% owner ARCH Venture Fund VIII Overage, L.P. · CIK 0001617237 · 10% owner ARCH VENTURE PARTNERS VI LP · CIK 0001274410 · 10% owner ARCH VENTURE PARTNERS VI LLC · CIK 0001274412 · 10% owner ARCH Venture Partners VIII, LLC · CIK 0001616165 · 10% owner BYBEE CLINTON · CIK 0001219043 · 10% owner NELSEN ROBERT · CIK 0001219042 · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Indirect · See Footnote Disclosed balance after: 2,182,995 F1 · kind: Distribution of Common Stock held by a limited partnership to its partners for no consideration. F2 · ownership.nature: 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. Read SEC document
December 11, 2017 Filed Dec 13, 2017 16:25 UTC	Quanterix Corp QTRX · Entity 6649	ConversionSeries D Preferred Stock · Derivative	4,087,193	Not disclosed	Not disclosed	Disclosure SEC source: 0001104659-17-073156 · a4.xml · derivative · entry 13 ARCH VENTURE FUND VI LP · CIK 0001222135 · 10% owner ARCH Venture Fund VIII Overage, L.P. · CIK 0001617237 · 10% owner ARCH VENTURE PARTNERS VI LP · CIK 0001274410 · 10% owner ARCH VENTURE PARTNERS VI LLC · CIK 0001274412 · 10% owner ARCH Venture Partners VIII, LLC · CIK 0001616165 · 10% owner BYBEE CLINTON · CIK 0001219043 · 10% owner NELSEN ROBERT · CIK 0001219042 · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 0 Underlying: Common Stock · 1,271,684 shares Expires not disclosed Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · derivative.exercise_price: 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. F1 · price: 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. F5 · derivative.exercise_date: 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. F6 · derivative.expiration_date: Not applicable. F3 · ownership.direct: 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 a managing director of ARCH VIII LLC, the Reporting Person may be deemed to beneficially own the shares held by ARCH Fund Overage. The Reporting Person disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein. Read SEC document
December 11, 2017 Filed Dec 13, 2017 16:25 UTC	Quanterix Corp QTRX · Entity 6649	ConversionSeries D Preferred Stock · Derivative	1,226,158	Not disclosed	Not disclosed	Disclosure SEC source: 0001104659-17-073156 · a4.xml · derivative · entry 12 ARCH VENTURE FUND VI LP · CIK 0001222135 · 10% owner ARCH Venture Fund VIII Overage, L.P. · CIK 0001617237 · 10% owner ARCH VENTURE PARTNERS VI LP · CIK 0001274410 · 10% owner ARCH VENTURE PARTNERS VI LLC · CIK 0001274412 · 10% owner ARCH Venture Partners VIII, LLC · CIK 0001616165 · 10% owner BYBEE CLINTON · CIK 0001219043 · 10% owner NELSEN ROBERT · CIK 0001219042 · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 0 Underlying: Common Stock · 381,507 shares Expires not disclosed Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · derivative.exercise_price: 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. F1 · price: 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. F5 · derivative.exercise_date: 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. F6 · derivative.expiration_date: Not applicable. F2 · ownership.direct: The shares are held of record by ARCH Venture Fund VI, L.P. ("ARCH Fund VI"). The sole general partner of ARCH Fund VI is ARCH Venture Partners VI, L.P. ("ARCH Partners VI"), which may be deemed to beneficially own the shares held by ARCH Fund VI. The sole general partner of ARCH Partners VI is ARCH Venture Partners VI, LLC ("ARCH VI LLC"), which may be deemed to beneficially own the shares held by ARCH Fund VI. ARCH Partners VI and ARCH VI LLC disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein. As a managing director of ARCH VI LLC, the Reporting Person may be deemed to beneficially own the shares held by ARCH Fund VI. The Reporting Person disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein. Read SEC document
December 11, 2017 Filed Dec 13, 2017 16:25 UTC	Quanterix Corp QTRX · Entity 6649	ConversionSeries C Preferred Stock · Derivative	352,800	Not disclosed	Not disclosed	Disclosure SEC source: 0001104659-17-073156 · a4.xml · derivative · entry 11 ARCH VENTURE FUND VI LP · CIK 0001222135 · 10% owner ARCH Venture Fund VIII Overage, L.P. · CIK 0001617237 · 10% owner ARCH VENTURE PARTNERS VI LP · CIK 0001274410 · 10% owner ARCH VENTURE PARTNERS VI LLC · CIK 0001274412 · 10% owner ARCH Venture Partners VIII, LLC · CIK 0001616165 · 10% owner BYBEE CLINTON · CIK 0001219043 · 10% owner NELSEN ROBERT · CIK 0001219042 · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 0 Underlying: Common Stock · 109,769 shares Expires not disclosed Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · derivative.exercise_price: 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. F1 · price: 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. F5 · derivative.exercise_date: 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. F6 · derivative.expiration_date: Not applicable. F2 · ownership.direct: The shares are held of record by ARCH Venture Fund VI, L.P. ("ARCH Fund VI"). The sole general partner of ARCH Fund VI is ARCH Venture Partners VI, L.P. ("ARCH Partners VI"), which may be deemed to beneficially own the shares held by ARCH Fund VI. The sole general partner of ARCH Partners VI is ARCH Venture Partners VI, LLC ("ARCH VI LLC"), which may be deemed to beneficially own the shares held by ARCH Fund VI. ARCH Partners VI and ARCH VI LLC disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein. As a managing director of ARCH VI LLC, the Reporting Person may be deemed to beneficially own the shares held by ARCH Fund VI. The Reporting Person disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein. Read SEC document
December 11, 2017 Filed Dec 13, 2017 16:25 UTC	Quanterix Corp QTRX · Entity 6649	ConversionSeries B Preferred Stock · Derivative	1,533,214	Not disclosed	Not disclosed	Disclosure SEC source: 0001104659-17-073156 · a4.xml · derivative · entry 10 ARCH VENTURE FUND VI LP · CIK 0001222135 · 10% owner ARCH Venture Fund VIII Overage, L.P. · CIK 0001617237 · 10% owner ARCH VENTURE PARTNERS VI LP · CIK 0001274410 · 10% owner ARCH VENTURE PARTNERS VI LLC · CIK 0001274412 · 10% owner ARCH Venture Partners VIII, LLC · CIK 0001616165 · 10% owner BYBEE CLINTON · CIK 0001219043 · 10% owner NELSEN ROBERT · CIK 0001219042 · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 0 Underlying: Common Stock · 477,042 shares Expires not disclosed Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · derivative.exercise_price: 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. F1 · price: 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. F5 · derivative.exercise_date: 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. F6 · derivative.expiration_date: Not applicable. F2 · ownership.direct: The shares are held of record by ARCH Venture Fund VI, L.P. ("ARCH Fund VI"). The sole general partner of ARCH Fund VI is ARCH Venture Partners VI, L.P. ("ARCH Partners VI"), which may be deemed to beneficially own the shares held by ARCH Fund VI. The sole general partner of ARCH Partners VI is ARCH Venture Partners VI, LLC ("ARCH VI LLC"), which may be deemed to beneficially own the shares held by ARCH Fund VI. ARCH Partners VI and ARCH VI LLC disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein. As a managing director of ARCH VI LLC, the Reporting Person may be deemed to beneficially own the shares held by ARCH Fund VI. The Reporting Person disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein. Read SEC document
December 11, 2017 Filed Dec 13, 2017 16:25 UTC	Quanterix Corp QTRX · Entity 6649	ConversionSeries A-2 Preferred Stock · Derivative	3,360,000	Not disclosed	Not disclosed	Disclosure SEC source: 0001104659-17-073156 · a4.xml · derivative · entry 9 ARCH VENTURE FUND VI LP · CIK 0001222135 · 10% owner ARCH Venture Fund VIII Overage, L.P. · CIK 0001617237 · 10% owner ARCH VENTURE PARTNERS VI LP · CIK 0001274410 · 10% owner ARCH VENTURE PARTNERS VI LLC · CIK 0001274412 · 10% owner ARCH Venture Partners VIII, LLC · CIK 0001616165 · 10% owner BYBEE CLINTON · CIK 0001219043 · 10% owner NELSEN ROBERT · CIK 0001219042 · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 0 Underlying: Common Stock · 1,045,426 shares Expires not disclosed Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · derivative.exercise_price: 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. F1 · price: 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. F5 · derivative.exercise_date: 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. F6 · derivative.expiration_date: Not applicable. F2 · ownership.direct: The shares are held of record by ARCH Venture Fund VI, L.P. ("ARCH Fund VI"). The sole general partner of ARCH Fund VI is ARCH Venture Partners VI, L.P. ("ARCH Partners VI"), which may be deemed to beneficially own the shares held by ARCH Fund VI. The sole general partner of ARCH Partners VI is ARCH Venture Partners VI, LLC ("ARCH VI LLC"), which may be deemed to beneficially own the shares held by ARCH Fund VI. ARCH Partners VI and ARCH VI LLC disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein. As a managing director of ARCH VI LLC, the Reporting Person may be deemed to beneficially own the shares held by ARCH Fund VI. The Reporting Person disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein. Read SEC document
December 11, 2017 Filed Dec 13, 2017 16:25 UTC	Quanterix Corp QTRX · Entity 6649	ConversionSeries A-1 Preferred Stock · Derivative	1,280,000	Not disclosed	Not disclosed	Disclosure SEC source: 0001104659-17-073156 · a4.xml · derivative · entry 8 ARCH VENTURE FUND VI LP · CIK 0001222135 · 10% owner ARCH Venture Fund VIII Overage, L.P. · CIK 0001617237 · 10% owner ARCH VENTURE PARTNERS VI LP · CIK 0001274410 · 10% owner ARCH VENTURE PARTNERS VI LLC · CIK 0001274412 · 10% owner ARCH Venture Partners VIII, LLC · CIK 0001616165 · 10% owner BYBEE CLINTON · CIK 0001219043 · 10% owner NELSEN ROBERT · CIK 0001219042 · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 0 Underlying: Common Stock · 398,257 shares Expires not disclosed Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · derivative.exercise_price: 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. F1 · price: 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. F5 · derivative.exercise_date: 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. F6 · derivative.expiration_date: Not applicable. F2 · ownership.direct: The shares are held of record by ARCH Venture Fund VI, L.P. ("ARCH Fund VI"). The sole general partner of ARCH Fund VI is ARCH Venture Partners VI, L.P. ("ARCH Partners VI"), which may be deemed to beneficially own the shares held by ARCH Fund VI. The sole general partner of ARCH Partners VI is ARCH Venture Partners VI, LLC ("ARCH VI LLC"), which may be deemed to beneficially own the shares held by ARCH Fund VI. ARCH Partners VI and ARCH VI LLC disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein. As a managing director of ARCH VI LLC, the Reporting Person may be deemed to beneficially own the shares held by ARCH Fund VI. The Reporting Person disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein. Read SEC document
December 11, 2017 Filed Dec 13, 2017 16:25 UTC	Quanterix Corp QTRX · Entity 6649	PurchaseCommon Stock	266,000	$15.00	$3,990,000.00	Disclosure SEC source: 0001104659-17-073156 · a4.xml · nonDerivative · entry 7 ARCH VENTURE FUND VI LP · CIK 0001222135 · 10% owner ARCH Venture Fund VIII Overage, L.P. · CIK 0001617237 · 10% owner ARCH VENTURE PARTNERS VI LP · CIK 0001274410 · 10% owner ARCH VENTURE PARTNERS VI LLC · CIK 0001274412 · 10% owner ARCH Venture Partners VIII, LLC · CIK 0001616165 · 10% owner BYBEE CLINTON · CIK 0001219043 · 10% owner NELSEN ROBERT · CIK 0001219042 · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 1,537,684 F4 · shares: Reflects shares purchased in the Issuer's initial public offering. F3 · ownership.direct: 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 a managing director of ARCH VIII LLC, the Reporting Person may be deemed to beneficially own the shares held by ARCH Fund Overage. The Reporting Person disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein. Read SEC document
December 11, 2017 Filed Dec 13, 2017 16:25 UTC	Quanterix Corp QTRX · Entity 6649	ConversionCommon Stock	1,271,684	Not disclosed	Not disclosed	Disclosure SEC source: 0001104659-17-073156 · a4.xml · nonDerivative · entry 6 ARCH VENTURE FUND VI LP · CIK 0001222135 · 10% owner ARCH Venture Fund VIII Overage, L.P. · CIK 0001617237 · 10% owner ARCH VENTURE PARTNERS VI LP · CIK 0001274410 · 10% owner ARCH VENTURE PARTNERS VI LLC · CIK 0001274412 · 10% owner ARCH Venture Partners VIII, LLC · CIK 0001616165 · 10% owner BYBEE CLINTON · CIK 0001219043 · 10% owner NELSEN ROBERT · CIK 0001219042 · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 1,271,684 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · price: 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. F3 · ownership.direct: 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 a managing director of ARCH VIII LLC, the Reporting Person may be deemed to beneficially own the shares held by ARCH Fund Overage. The Reporting Person disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein. Read SEC document
December 11, 2017 Filed Dec 13, 2017 16:25 UTC	Quanterix Corp QTRX · Entity 6649	ConversionCommon Stock	381,507	Not disclosed	Not disclosed	Disclosure SEC source: 0001104659-17-073156 · a4.xml · nonDerivative · entry 5 ARCH VENTURE FUND VI LP · CIK 0001222135 · 10% owner ARCH Venture Fund VIII Overage, L.P. · CIK 0001617237 · 10% owner ARCH VENTURE PARTNERS VI LP · CIK 0001274410 · 10% owner ARCH VENTURE PARTNERS VI LLC · CIK 0001274412 · 10% owner ARCH Venture Partners VIII, LLC · CIK 0001616165 · 10% owner BYBEE CLINTON · CIK 0001219043 · 10% owner NELSEN ROBERT · CIK 0001219042 · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 2,412,001 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · price: 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. F2 · ownership.direct: The shares are held of record by ARCH Venture Fund VI, L.P. ("ARCH Fund VI"). The sole general partner of ARCH Fund VI is ARCH Venture Partners VI, L.P. ("ARCH Partners VI"), which may be deemed to beneficially own the shares held by ARCH Fund VI. The sole general partner of ARCH Partners VI is ARCH Venture Partners VI, LLC ("ARCH VI LLC"), which may be deemed to beneficially own the shares held by ARCH Fund VI. ARCH Partners VI and ARCH VI LLC disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein. As a managing director of ARCH VI LLC, the Reporting Person may be deemed to beneficially own the shares held by ARCH Fund VI. The Reporting Person disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein. Read SEC document
December 11, 2017 Filed Dec 13, 2017 16:25 UTC	Quanterix Corp QTRX · Entity 6649	ConversionCommon Stock	109,769	Not disclosed	Not disclosed	Disclosure SEC source: 0001104659-17-073156 · a4.xml · nonDerivative · entry 4 ARCH VENTURE FUND VI LP · CIK 0001222135 · 10% owner ARCH Venture Fund VIII Overage, L.P. · CIK 0001617237 · 10% owner ARCH VENTURE PARTNERS VI LP · CIK 0001274410 · 10% owner ARCH VENTURE PARTNERS VI LLC · CIK 0001274412 · 10% owner ARCH Venture Partners VIII, LLC · CIK 0001616165 · 10% owner BYBEE CLINTON · CIK 0001219043 · 10% owner NELSEN ROBERT · CIK 0001219042 · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 2,030,494 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · price: 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. F2 · ownership.direct: The shares are held of record by ARCH Venture Fund VI, L.P. ("ARCH Fund VI"). The sole general partner of ARCH Fund VI is ARCH Venture Partners VI, L.P. ("ARCH Partners VI"), which may be deemed to beneficially own the shares held by ARCH Fund VI. The sole general partner of ARCH Partners VI is ARCH Venture Partners VI, LLC ("ARCH VI LLC"), which may be deemed to beneficially own the shares held by ARCH Fund VI. ARCH Partners VI and ARCH VI LLC disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein. As a managing director of ARCH VI LLC, the Reporting Person may be deemed to beneficially own the shares held by ARCH Fund VI. The Reporting Person disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein. Read SEC document
December 11, 2017 Filed Dec 13, 2017 16:25 UTC	Quanterix Corp QTRX · Entity 6649	ConversionCommon Stock	477,042	Not disclosed	Not disclosed	Disclosure SEC source: 0001104659-17-073156 · a4.xml · nonDerivative · entry 3 ARCH VENTURE FUND VI LP · CIK 0001222135 · 10% owner ARCH Venture Fund VIII Overage, L.P. · CIK 0001617237 · 10% owner ARCH VENTURE PARTNERS VI LP · CIK 0001274410 · 10% owner ARCH VENTURE PARTNERS VI LLC · CIK 0001274412 · 10% owner ARCH Venture Partners VIII, LLC · CIK 0001616165 · 10% owner BYBEE CLINTON · CIK 0001219043 · 10% owner NELSEN ROBERT · CIK 0001219042 · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 1,920,725 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · price: 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. F2 · ownership.direct: The shares are held of record by ARCH Venture Fund VI, L.P. ("ARCH Fund VI"). The sole general partner of ARCH Fund VI is ARCH Venture Partners VI, L.P. ("ARCH Partners VI"), which may be deemed to beneficially own the shares held by ARCH Fund VI. The sole general partner of ARCH Partners VI is ARCH Venture Partners VI, LLC ("ARCH VI LLC"), which may be deemed to beneficially own the shares held by ARCH Fund VI. ARCH Partners VI and ARCH VI LLC disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein. As a managing director of ARCH VI LLC, the Reporting Person may be deemed to beneficially own the shares held by ARCH Fund VI. The Reporting Person disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein. Read SEC document
December 11, 2017 Filed Dec 13, 2017 16:25 UTC	Quanterix Corp QTRX · Entity 6649	ConversionCommon Stock	1,045,426	Not disclosed	Not disclosed	Disclosure SEC source: 0001104659-17-073156 · a4.xml · nonDerivative · entry 2 ARCH VENTURE FUND VI LP · CIK 0001222135 · 10% owner ARCH Venture Fund VIII Overage, L.P. · CIK 0001617237 · 10% owner ARCH VENTURE PARTNERS VI LP · CIK 0001274410 · 10% owner ARCH VENTURE PARTNERS VI LLC · CIK 0001274412 · 10% owner ARCH Venture Partners VIII, LLC · CIK 0001616165 · 10% owner BYBEE CLINTON · CIK 0001219043 · 10% owner NELSEN ROBERT · CIK 0001219042 · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 1,443,683 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · price: 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. F2 · ownership.direct: The shares are held of record by ARCH Venture Fund VI, L.P. ("ARCH Fund VI"). The sole general partner of ARCH Fund VI is ARCH Venture Partners VI, L.P. ("ARCH Partners VI"), which may be deemed to beneficially own the shares held by ARCH Fund VI. The sole general partner of ARCH Partners VI is ARCH Venture Partners VI, LLC ("ARCH VI LLC"), which may be deemed to beneficially own the shares held by ARCH Fund VI. ARCH Partners VI and ARCH VI LLC disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein. As a managing director of ARCH VI LLC, the Reporting Person may be deemed to beneficially own the shares held by ARCH Fund VI. The Reporting Person disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein. Read SEC document
December 11, 2017 Filed Dec 13, 2017 16:25 UTC	Quanterix Corp QTRX · Entity 6649	ConversionCommon Stock	398,257	Not disclosed	Not disclosed	Disclosure SEC source: 0001104659-17-073156 · a4.xml · nonDerivative · entry 1 ARCH VENTURE FUND VI LP · CIK 0001222135 · 10% owner ARCH Venture Fund VIII Overage, L.P. · CIK 0001617237 · 10% owner ARCH VENTURE PARTNERS VI LP · CIK 0001274410 · 10% owner ARCH VENTURE PARTNERS VI LLC · CIK 0001274412 · 10% owner ARCH Venture Partners VIII, LLC · CIK 0001616165 · 10% owner BYBEE CLINTON · CIK 0001219043 · 10% owner NELSEN ROBERT · CIK 0001219042 · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 398,257 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · price: 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. F2 · ownership.direct: The shares are held of record by ARCH Venture Fund VI, L.P. ("ARCH Fund VI"). The sole general partner of ARCH Fund VI is ARCH Venture Partners VI, L.P. ("ARCH Partners VI"), which may be deemed to beneficially own the shares held by ARCH Fund VI. The sole general partner of ARCH Partners VI is ARCH Venture Partners VI, LLC ("ARCH VI LLC"), which may be deemed to beneficially own the shares held by ARCH Fund VI. ARCH Partners VI and ARCH VI LLC disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein. As a managing director of ARCH VI LLC, the Reporting Person may be deemed to beneficially own the shares held by ARCH Fund VI. The Reporting Person disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein. Read SEC document
October 11, 2016 Filed Oct 13, 2016 16:02 UTC	XTERA COMMUNICATIONS, INC. XCOM · Entity 181654	PurchaseWarrants to Purchase Common Stock · Derivative	83,500	$0.00 Strike: $0.61	$0.00	Disclosure SEC source: 0001209191-16-145790 · doc4.xml · derivative · entry 1 ARCH VENTURE FUND VI LP · CIK 0001222135 · 10% owner ARCH VENTURE PARTNERS VI LP · CIK 0001274410 · 10% owner ARCH VENTURE PARTNERS VI LLC · CIK 0001274412 · 10% owner CRANDELL KEITH · CIK 0001219039 · 10% owner NELSEN ROBERT · CIK 0001219042 · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Indirect · See Footnote Disclosed balance after: 500,167 Underlying: Common Stock · 83,500 shares Expires 2026-10-11 F1 · price: The Warrants reported on this Form 4 were issued by Xtera Communications, Inc. (the "Company") as part of a private placement of secured promissory notes (the "Notes"). Each purchaser of Notes received warrants to purchase one share of the Company's Common Stock for each $1.00 of principal amount of Notes purchased F2 · ownership.nature: The Warrants are held of record by ARCH Venture Fund VI, L.P. ("ARCH Fund VI"). The sole general partner of ARCH Fund VI is ARCH Venture Partners VI, L.P. ("ARCH Partners VI"), which may be deemed to beneficially own the shares held by ARCH Fund VI. The sole general partner of ARCH Partners VI is ARCH Venture Partners VI, LLC ("ARCH VI LLC"), which may be deemed to beneficially own the shares held by ARCH Fund VI. ARCH Partners VI and ARCH VI LLC disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein. The managing directors of ARCH VI LLC are Clinton Bybee, Keith Crandell and Robert Nelsen, and as such they may be deemed to have shared voting and investment power over the shares held by ARCH Fund VI. Mr. Bybee is a member of the Company's board of directors. Messrs. Bybee, Crandell and Nelsen disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein. Read SEC document
September 27, 2016 Filed Sep 28, 2016 16:13 UTC	XTERA COMMUNICATIONS, INC. XCOM · Entity 181654	PurchaseWarrants to Purchase Common Stock · Derivative	250,000	$0.00 Strike: $0.61	$0.00	Disclosure SEC source: 0001209191-16-142995 · doc4.xml · derivative · entry 1 ARCH VENTURE FUND VI LP · CIK 0001222135 · 10% owner ARCH VENTURE PARTNERS VI LP · CIK 0001274410 · 10% owner ARCH VENTURE PARTNERS VI LLC · CIK 0001274412 · 10% owner CRANDELL KEITH · CIK 0001219039 · 10% owner NELSEN ROBERT · CIK 0001219042 · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Indirect · See Footnote Disclosed balance after: 416,667 Underlying: Common Stock · 250,000 shares Expires 2026-09-27 F1 · price: The Warrants reported on this Form 4 were issued by Xtera Communications, Inc. (the "Company") as part of a private placement of secured promissory notes (the "Notes"). Each purchaser of Notes received warrants to purchase one share of the Company's Common Stock for each $1.00 of principal amount of Notes purchased F2 · ownership.nature: The Warrants are held of record by ARCH Venture Fund VI, L.P. ("ARCH Fund VI"). The sole general partner of ARCH Fund VI is ARCH Venture Partners VI, L.P. ("ARCH Partners VI"), which may be deemed to beneficially own the shares held by ARCH Fund VI. The sole general partner of ARCH Partners VI is ARCH Venture Partners VI, LLC ("ARCH VI LLC"), which may be deemed to beneficially own the shares held by ARCH Fund VI. ARCH Partners VI and ARCH VI LLC disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein. The managing directors of ARCH VI LLC are Clinton Bybee, Keith Crandell and Robert Nelsen, and as such they may be deemed to have shared voting and investment power over the shares held by ARCH Fund VI. Mr. Bybee is a member of the Company's board of directors. Messrs. Bybee, Crandell and Nelsen disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein. Read SEC document
September 13, 2016 Filed Sep 15, 2016 14:26 UTC	XTERA COMMUNICATIONS, INC. XCOM · Entity 181654	PurchaseWarrants to Purchase Common Stock · Derivative	166,667	$0.00 Strike: $0.60	$0.00	Disclosure SEC source: 0001209191-16-141532 · doc4.xml · derivative · entry 1 ARCH VENTURE FUND VI LP · CIK 0001222135 · 10% owner ARCH VENTURE PARTNERS VI LP · CIK 0001274410 · 10% owner ARCH VENTURE PARTNERS VI LLC · CIK 0001274412 · 10% owner CRANDELL KEITH · CIK 0001219039 · 10% owner NELSEN ROBERT · CIK 0001219042 · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Indirect · See Footnote Disclosed balance after: 166,667 Underlying: Common Stock · 166,667 shares Expires 2026-09-13 F1 · price: The Warrants reported on this Form 4 were issued by Xtera Communications, Inc. (the "Company") as part of a private placement of secured promissory notes (the "Notes") conducted on September 13, 2016. Each purchaser of Notes received warrants to purchase one share of the Company's Common Stock for each $1.00 of principal amount of Notes purchased F2 · ownership.nature: The Warrants are held of record by ARCH Venture Fund VI, L.P. ("ARCH Fund VI"). The sole general partner of ARCH Fund VI is ARCH Venture Partners VI, L.P. ("ARCH Partners VI"), which may be deemed to beneficially own the shares held by ARCH Fund VI. The sole general partner of ARCH Partners VI is ARCH Venture Partners VI, LLC ("ARCH VI LLC"), which may be deemed to beneficially own the shares held by ARCH Fund VI. ARCH Partners VI and ARCH VI LLC disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein. The managing directors of ARCH VI LLC are Clinton Bybee, Keith Crandell and Robert Nelsen, and as such they may be deemed to have shared voting and investment power over the shares held by ARCH Fund VI. Mr. Bybee is a member of the Company's board of directors. Messrs. Bybee, Crandell and Nelsen disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein. Read SEC document

Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.