{"transactions":[{"id":2967758,"issuer":{"id":6649,"kind":"organization","name":"Quanterix Corp","symbol":"QTRX"},"owners":[{"id":145090,"kind":"organization","name":"ARCH VENTURE FUND VI LP","position":1,"cik":"0001222135","reported_name":"ARCH VENTURE FUND VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73815,"kind":"organization","name":"ARCH Venture Fund VIII Overage, L.P.","position":2,"cik":"0001617237","reported_name":"ARCH Venture Fund VIII Overage, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145091,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LP","position":3,"cik":"0001274410","reported_name":"ARCH VENTURE PARTNERS VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145092,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LLC","position":4,"cik":"0001274412","reported_name":"ARCH VENTURE PARTNERS VI LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73814,"kind":"organization","name":"ARCH Venture Partners VIII, LLC","position":5,"cik":"0001616165","reported_name":"ARCH Venture Partners VIII, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32073,"kind":"person","name":"BYBEE CLINTON","position":6,"cik":"0001219043","reported_name":"BYBEE CLINTON","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32074,"kind":"person","name":"NELSEN ROBERT","position":7,"cik":"0001219042","reported_name":"NELSEN ROBERT","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2020-11-24T20:59:08.000Z","date":"2020-11-24","kind":"other","acquired":true,"shares":1036,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Distribution of Common Stock held by a limited partnership to its partners for no consideration."},{"field":"kind","element":"transactionCoding","label":"F4","text":"Change from indirect to direct ownership of shares previously reported as beneficially owned by the Reporting Person."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F6","text":"Shares owned by Bybee."}],"balance_after":1889,"source":{"system":"sec-edgar","filing":"0001062993-20-005886","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1222135/000106299320005886/form4.xml","form_type":"4"}},{"id":2967757,"issuer":{"id":6649,"kind":"organization","name":"Quanterix Corp","symbol":"QTRX"},"owners":[{"id":145090,"kind":"organization","name":"ARCH VENTURE FUND VI LP","position":1,"cik":"0001222135","reported_name":"ARCH VENTURE FUND VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73815,"kind":"organization","name":"ARCH Venture Fund VIII Overage, L.P.","position":2,"cik":"0001617237","reported_name":"ARCH Venture Fund VIII Overage, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145091,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LP","position":3,"cik":"0001274410","reported_name":"ARCH VENTURE PARTNERS VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145092,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LLC","position":4,"cik":"0001274412","reported_name":"ARCH VENTURE PARTNERS VI LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73814,"kind":"organization","name":"ARCH Venture Partners VIII, LLC","position":5,"cik":"0001616165","reported_name":"ARCH Venture Partners VIII, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32073,"kind":"person","name":"BYBEE CLINTON","position":6,"cik":"0001219043","reported_name":"BYBEE CLINTON","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32074,"kind":"person","name":"NELSEN ROBERT","position":7,"cik":"0001219042","reported_name":"NELSEN ROBERT","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2020-11-24T20:59:08.000Z","date":"2020-11-24","kind":"other","acquired":true,"shares":1034,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Distribution of Common Stock held by a limited partnership to its partners for no consideration."},{"field":"kind","element":"transactionCoding","label":"F4","text":"Change from indirect to direct ownership of shares previously reported as beneficially owned by the Reporting Person."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F5","text":"Shares owned by Nelsen."}],"balance_after":1888,"source":{"system":"sec-edgar","filing":"0001062993-20-005886","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1222135/000106299320005886/form4.xml","form_type":"4"}},{"id":2967756,"issuer":{"id":6649,"kind":"organization","name":"Quanterix Corp","symbol":"QTRX"},"owners":[{"id":145090,"kind":"organization","name":"ARCH VENTURE FUND VI LP","position":1,"cik":"0001222135","reported_name":"ARCH VENTURE FUND VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73815,"kind":"organization","name":"ARCH Venture Fund VIII Overage, L.P.","position":2,"cik":"0001617237","reported_name":"ARCH Venture Fund VIII Overage, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145091,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LP","position":3,"cik":"0001274410","reported_name":"ARCH VENTURE PARTNERS VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145092,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LLC","position":4,"cik":"0001274412","reported_name":"ARCH VENTURE PARTNERS VI LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73814,"kind":"organization","name":"ARCH Venture Partners VIII, LLC","position":5,"cik":"0001616165","reported_name":"ARCH Venture Partners VIII, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32073,"kind":"person","name":"BYBEE CLINTON","position":6,"cik":"0001219043","reported_name":"BYBEE CLINTON","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32074,"kind":"person","name":"NELSEN ROBERT","position":7,"cik":"0001219042","reported_name":"NELSEN ROBERT","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2020-11-24T20:59:08.000Z","date":"2020-11-24","kind":"other","acquired":false,"shares":176920,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Distribution of Common Stock held by a limited partnership to its partners for no consideration."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"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."}],"balance_after":1214770,"source":{"system":"sec-edgar","filing":"0001062993-20-005886","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1222135/000106299320005886/form4.xml","form_type":"4"}},{"id":2967755,"issuer":{"id":6649,"kind":"organization","name":"Quanterix Corp","symbol":"QTRX"},"owners":[{"id":145090,"kind":"organization","name":"ARCH VENTURE FUND VI LP","position":1,"cik":"0001222135","reported_name":"ARCH VENTURE FUND VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73815,"kind":"organization","name":"ARCH Venture Fund VIII Overage, L.P.","position":2,"cik":"0001617237","reported_name":"ARCH Venture Fund VIII Overage, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145091,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LP","position":3,"cik":"0001274410","reported_name":"ARCH VENTURE PARTNERS VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145092,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LLC","position":4,"cik":"0001274412","reported_name":"ARCH VENTURE PARTNERS VI LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73814,"kind":"organization","name":"ARCH Venture Partners VIII, LLC","position":5,"cik":"0001616165","reported_name":"ARCH Venture Partners VIII, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32073,"kind":"person","name":"BYBEE CLINTON","position":6,"cik":"0001219043","reported_name":"BYBEE CLINTON","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32074,"kind":"person","name":"NELSEN ROBERT","position":7,"cik":"0001219042","reported_name":"NELSEN ROBERT","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2020-11-24T20:59:08.000Z","date":"2020-11-24","kind":"other","acquired":false,"shares":277514,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Distribution of Common Stock held by a limited partnership to its partners for no consideration."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"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."}],"balance_after":1905481,"source":{"system":"sec-edgar","filing":"0001062993-20-005886","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1222135/000106299320005886/form4.xml","form_type":"4"}},{"id":2967754,"issuer":{"id":6649,"kind":"organization","name":"Quanterix Corp","symbol":"QTRX"},"owners":[{"id":145090,"kind":"organization","name":"ARCH VENTURE FUND VI LP","position":1,"cik":"0001222135","reported_name":"ARCH VENTURE FUND VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73815,"kind":"organization","name":"ARCH Venture Fund VIII Overage, L.P.","position":2,"cik":"0001617237","reported_name":"ARCH Venture Fund VIII Overage, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145091,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LP","position":3,"cik":"0001274410","reported_name":"ARCH VENTURE PARTNERS VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145092,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LLC","position":4,"cik":"0001274412","reported_name":"ARCH VENTURE PARTNERS VI LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73814,"kind":"organization","name":"ARCH Venture Partners VIII, LLC","position":5,"cik":"0001616165","reported_name":"ARCH Venture Partners VIII, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32073,"kind":"person","name":"BYBEE CLINTON","position":6,"cik":"0001219043","reported_name":"BYBEE CLINTON","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32074,"kind":"person","name":"NELSEN ROBERT","position":7,"cik":"0001219042","reported_name":"NELSEN ROBERT","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2020-11-24T20:59:08.000Z","date":"2020-11-20","kind":"other","acquired":true,"shares":853,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Distribution of Common Stock held by a limited partnership to its partners for no consideration."},{"field":"kind","element":"transactionCoding","label":"F4","text":"Change from indirect to direct ownership of shares previously reported as beneficially owned by the Reporting Person."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F6","text":"Shares owned by Bybee."}],"balance_after":853,"source":{"system":"sec-edgar","filing":"0001062993-20-005886","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1222135/000106299320005886/form4.xml","form_type":"4"}},{"id":2967753,"issuer":{"id":6649,"kind":"organization","name":"Quanterix Corp","symbol":"QTRX"},"owners":[{"id":145090,"kind":"organization","name":"ARCH VENTURE FUND VI LP","position":1,"cik":"0001222135","reported_name":"ARCH VENTURE FUND VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73815,"kind":"organization","name":"ARCH Venture Fund VIII Overage, L.P.","position":2,"cik":"0001617237","reported_name":"ARCH Venture Fund VIII Overage, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145091,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LP","position":3,"cik":"0001274410","reported_name":"ARCH VENTURE PARTNERS VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145092,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LLC","position":4,"cik":"0001274412","reported_name":"ARCH VENTURE PARTNERS VI LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73814,"kind":"organization","name":"ARCH Venture Partners VIII, LLC","position":5,"cik":"0001616165","reported_name":"ARCH Venture Partners VIII, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32073,"kind":"person","name":"BYBEE CLINTON","position":6,"cik":"0001219043","reported_name":"BYBEE CLINTON","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32074,"kind":"person","name":"NELSEN ROBERT","position":7,"cik":"0001219042","reported_name":"NELSEN ROBERT","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2020-11-24T20:59:08.000Z","date":"2020-11-20","kind":"other","acquired":true,"shares":854,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Distribution of Common Stock held by a limited partnership to its partners for no consideration."},{"field":"kind","element":"transactionCoding","label":"F4","text":"Change from indirect to direct ownership of shares previously reported as beneficially owned by the Reporting Person."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F5","text":"Shares owned by Nelsen."}],"balance_after":854,"source":{"system":"sec-edgar","filing":"0001062993-20-005886","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1222135/000106299320005886/form4.xml","form_type":"4"}},{"id":2967752,"issuer":{"id":6649,"kind":"organization","name":"Quanterix Corp","symbol":"QTRX"},"owners":[{"id":145090,"kind":"organization","name":"ARCH VENTURE FUND VI LP","position":1,"cik":"0001222135","reported_name":"ARCH VENTURE FUND VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73815,"kind":"organization","name":"ARCH Venture Fund VIII Overage, L.P.","position":2,"cik":"0001617237","reported_name":"ARCH Venture Fund VIII Overage, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145091,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LP","position":3,"cik":"0001274410","reported_name":"ARCH VENTURE PARTNERS VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145092,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LLC","position":4,"cik":"0001274412","reported_name":"ARCH VENTURE PARTNERS VI LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73814,"kind":"organization","name":"ARCH Venture Partners VIII, LLC","position":5,"cik":"0001616165","reported_name":"ARCH Venture Partners VIII, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32073,"kind":"person","name":"BYBEE CLINTON","position":6,"cik":"0001219043","reported_name":"BYBEE CLINTON","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32074,"kind":"person","name":"NELSEN ROBERT","position":7,"cik":"0001219042","reported_name":"NELSEN ROBERT","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2020-11-24T20:59:08.000Z","date":"2020-11-20","kind":"other","acquired":false,"shares":145994,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Distribution of Common Stock held by a limited partnership to its partners for no consideration."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"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."}],"balance_after":1391690,"source":{"system":"sec-edgar","filing":"0001062993-20-005886","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1222135/000106299320005886/form4.xml","form_type":"4"}},{"id":2967751,"issuer":{"id":6649,"kind":"organization","name":"Quanterix Corp","symbol":"QTRX"},"owners":[{"id":145090,"kind":"organization","name":"ARCH VENTURE FUND VI LP","position":1,"cik":"0001222135","reported_name":"ARCH VENTURE FUND VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73815,"kind":"organization","name":"ARCH Venture Fund VIII Overage, L.P.","position":2,"cik":"0001617237","reported_name":"ARCH Venture Fund VIII Overage, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145091,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LP","position":3,"cik":"0001274410","reported_name":"ARCH VENTURE PARTNERS VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145092,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LLC","position":4,"cik":"0001274412","reported_name":"ARCH VENTURE PARTNERS VI LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73814,"kind":"organization","name":"ARCH Venture Partners VIII, LLC","position":5,"cik":"0001616165","reported_name":"ARCH Venture Partners VIII, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32073,"kind":"person","name":"BYBEE CLINTON","position":6,"cik":"0001219043","reported_name":"BYBEE CLINTON","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32074,"kind":"person","name":"NELSEN ROBERT","position":7,"cik":"0001219042","reported_name":"NELSEN ROBERT","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2020-11-24T20:59:08.000Z","date":"2020-11-20","kind":"other","acquired":false,"shares":229006,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Distribution of Common Stock held by a limited partnership to its partners for no consideration."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"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."}],"balance_after":2182995,"source":{"system":"sec-edgar","filing":"0001062993-20-005886","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1222135/000106299320005886/form4.xml","form_type":"4"}},{"id":4133126,"issuer":{"id":6649,"kind":"organization","name":"Quanterix Corp","symbol":"QTRX"},"owners":[{"id":145090,"kind":"organization","name":"ARCH VENTURE FUND VI LP","position":1,"cik":"0001222135","reported_name":"ARCH VENTURE FUND VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73815,"kind":"organization","name":"ARCH Venture Fund VIII Overage, L.P.","position":2,"cik":"0001617237","reported_name":"ARCH Venture Fund VIII Overage, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145091,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LP","position":3,"cik":"0001274410","reported_name":"ARCH VENTURE PARTNERS VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145092,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LLC","position":4,"cik":"0001274412","reported_name":"ARCH VENTURE PARTNERS VI LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73814,"kind":"organization","name":"ARCH Venture Partners VIII, LLC","position":5,"cik":"0001616165","reported_name":"ARCH Venture Partners VIII, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32073,"kind":"person","name":"BYBEE CLINTON","position":6,"cik":"0001219043","reported_name":"BYBEE CLINTON","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32074,"kind":"person","name":"NELSEN ROBERT","position":7,"cik":"0001219042","reported_name":"NELSEN ROBERT","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series D Preferred Stock","published_at":"2017-12-13T16:25:35.000Z","date":"2017-12-11","kind":"exercise","acquired":false,"shares":4087193,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"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."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"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."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"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."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"Not applicable."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F3","text":"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."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":1271684},"source":{"system":"sec-edgar","filing":"0001104659-17-073156","document":"a4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":13,"url":"https://www.sec.gov/Archives/edgar/data/1222135/000110465917073156/a4.xml","form_type":"4"}},{"id":4133125,"issuer":{"id":6649,"kind":"organization","name":"Quanterix Corp","symbol":"QTRX"},"owners":[{"id":145090,"kind":"organization","name":"ARCH VENTURE FUND VI LP","position":1,"cik":"0001222135","reported_name":"ARCH VENTURE FUND VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73815,"kind":"organization","name":"ARCH Venture Fund VIII Overage, L.P.","position":2,"cik":"0001617237","reported_name":"ARCH Venture Fund VIII Overage, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145091,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LP","position":3,"cik":"0001274410","reported_name":"ARCH VENTURE PARTNERS VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145092,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LLC","position":4,"cik":"0001274412","reported_name":"ARCH VENTURE PARTNERS VI LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73814,"kind":"organization","name":"ARCH Venture Partners VIII, LLC","position":5,"cik":"0001616165","reported_name":"ARCH Venture Partners VIII, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32073,"kind":"person","name":"BYBEE CLINTON","position":6,"cik":"0001219043","reported_name":"BYBEE CLINTON","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32074,"kind":"person","name":"NELSEN ROBERT","position":7,"cik":"0001219042","reported_name":"NELSEN ROBERT","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series D Preferred Stock","published_at":"2017-12-13T16:25:35.000Z","date":"2017-12-11","kind":"exercise","acquired":false,"shares":1226158,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"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."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"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."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"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."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"Not applicable."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"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."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":381507},"source":{"system":"sec-edgar","filing":"0001104659-17-073156","document":"a4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/1222135/000110465917073156/a4.xml","form_type":"4"}},{"id":4133124,"issuer":{"id":6649,"kind":"organization","name":"Quanterix Corp","symbol":"QTRX"},"owners":[{"id":145090,"kind":"organization","name":"ARCH VENTURE FUND VI LP","position":1,"cik":"0001222135","reported_name":"ARCH VENTURE FUND VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73815,"kind":"organization","name":"ARCH Venture Fund VIII Overage, L.P.","position":2,"cik":"0001617237","reported_name":"ARCH Venture Fund VIII Overage, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145091,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LP","position":3,"cik":"0001274410","reported_name":"ARCH VENTURE PARTNERS VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145092,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LLC","position":4,"cik":"0001274412","reported_name":"ARCH VENTURE PARTNERS VI LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73814,"kind":"organization","name":"ARCH Venture Partners VIII, LLC","position":5,"cik":"0001616165","reported_name":"ARCH Venture Partners VIII, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32073,"kind":"person","name":"BYBEE CLINTON","position":6,"cik":"0001219043","reported_name":"BYBEE CLINTON","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32074,"kind":"person","name":"NELSEN ROBERT","position":7,"cik":"0001219042","reported_name":"NELSEN ROBERT","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series C Preferred Stock","published_at":"2017-12-13T16:25:35.000Z","date":"2017-12-11","kind":"exercise","acquired":false,"shares":352800,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"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."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"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."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"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."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"Not applicable."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"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."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":109769},"source":{"system":"sec-edgar","filing":"0001104659-17-073156","document":"a4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1222135/000110465917073156/a4.xml","form_type":"4"}},{"id":4133123,"issuer":{"id":6649,"kind":"organization","name":"Quanterix Corp","symbol":"QTRX"},"owners":[{"id":145090,"kind":"organization","name":"ARCH VENTURE FUND VI LP","position":1,"cik":"0001222135","reported_name":"ARCH VENTURE FUND VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73815,"kind":"organization","name":"ARCH Venture Fund VIII Overage, L.P.","position":2,"cik":"0001617237","reported_name":"ARCH Venture Fund VIII Overage, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145091,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LP","position":3,"cik":"0001274410","reported_name":"ARCH VENTURE PARTNERS VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145092,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LLC","position":4,"cik":"0001274412","reported_name":"ARCH VENTURE PARTNERS VI LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73814,"kind":"organization","name":"ARCH Venture Partners VIII, LLC","position":5,"cik":"0001616165","reported_name":"ARCH Venture Partners VIII, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32073,"kind":"person","name":"BYBEE CLINTON","position":6,"cik":"0001219043","reported_name":"BYBEE CLINTON","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32074,"kind":"person","name":"NELSEN ROBERT","position":7,"cik":"0001219042","reported_name":"NELSEN ROBERT","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series B Preferred Stock","published_at":"2017-12-13T16:25:35.000Z","date":"2017-12-11","kind":"exercise","acquired":false,"shares":1533214,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"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."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"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."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"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."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"Not applicable."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"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."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":477042},"source":{"system":"sec-edgar","filing":"0001104659-17-073156","document":"a4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1222135/000110465917073156/a4.xml","form_type":"4"}},{"id":4133122,"issuer":{"id":6649,"kind":"organization","name":"Quanterix Corp","symbol":"QTRX"},"owners":[{"id":145090,"kind":"organization","name":"ARCH VENTURE FUND VI LP","position":1,"cik":"0001222135","reported_name":"ARCH VENTURE FUND VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73815,"kind":"organization","name":"ARCH Venture Fund VIII Overage, L.P.","position":2,"cik":"0001617237","reported_name":"ARCH Venture Fund VIII Overage, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145091,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LP","position":3,"cik":"0001274410","reported_name":"ARCH VENTURE PARTNERS VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145092,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LLC","position":4,"cik":"0001274412","reported_name":"ARCH VENTURE PARTNERS VI LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73814,"kind":"organization","name":"ARCH Venture Partners VIII, LLC","position":5,"cik":"0001616165","reported_name":"ARCH Venture Partners VIII, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32073,"kind":"person","name":"BYBEE CLINTON","position":6,"cik":"0001219043","reported_name":"BYBEE CLINTON","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32074,"kind":"person","name":"NELSEN ROBERT","position":7,"cik":"0001219042","reported_name":"NELSEN ROBERT","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A-2 Preferred Stock","published_at":"2017-12-13T16:25:35.000Z","date":"2017-12-11","kind":"exercise","acquired":false,"shares":3360000,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"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."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"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."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"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."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"Not applicable."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"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."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":1045426},"source":{"system":"sec-edgar","filing":"0001104659-17-073156","document":"a4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1222135/000110465917073156/a4.xml","form_type":"4"}},{"id":4133121,"issuer":{"id":6649,"kind":"organization","name":"Quanterix Corp","symbol":"QTRX"},"owners":[{"id":145090,"kind":"organization","name":"ARCH VENTURE FUND VI LP","position":1,"cik":"0001222135","reported_name":"ARCH VENTURE FUND VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73815,"kind":"organization","name":"ARCH Venture Fund VIII Overage, L.P.","position":2,"cik":"0001617237","reported_name":"ARCH Venture Fund VIII Overage, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145091,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LP","position":3,"cik":"0001274410","reported_name":"ARCH VENTURE PARTNERS VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145092,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LLC","position":4,"cik":"0001274412","reported_name":"ARCH VENTURE PARTNERS VI LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73814,"kind":"organization","name":"ARCH Venture Partners VIII, LLC","position":5,"cik":"0001616165","reported_name":"ARCH Venture Partners VIII, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32073,"kind":"person","name":"BYBEE CLINTON","position":6,"cik":"0001219043","reported_name":"BYBEE CLINTON","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32074,"kind":"person","name":"NELSEN ROBERT","position":7,"cik":"0001219042","reported_name":"NELSEN ROBERT","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A-1 Preferred Stock","published_at":"2017-12-13T16:25:35.000Z","date":"2017-12-11","kind":"exercise","acquired":false,"shares":1280000,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"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."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"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."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"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."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"Not applicable."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"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."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":398257},"source":{"system":"sec-edgar","filing":"0001104659-17-073156","document":"a4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1222135/000110465917073156/a4.xml","form_type":"4"}},{"id":4133120,"issuer":{"id":6649,"kind":"organization","name":"Quanterix Corp","symbol":"QTRX"},"owners":[{"id":145090,"kind":"organization","name":"ARCH VENTURE FUND VI LP","position":1,"cik":"0001222135","reported_name":"ARCH VENTURE FUND VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73815,"kind":"organization","name":"ARCH Venture Fund VIII Overage, L.P.","position":2,"cik":"0001617237","reported_name":"ARCH Venture Fund VIII Overage, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145091,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LP","position":3,"cik":"0001274410","reported_name":"ARCH VENTURE PARTNERS VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145092,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LLC","position":4,"cik":"0001274412","reported_name":"ARCH VENTURE PARTNERS VI LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73814,"kind":"organization","name":"ARCH Venture Partners VIII, LLC","position":5,"cik":"0001616165","reported_name":"ARCH Venture Partners VIII, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32073,"kind":"person","name":"BYBEE CLINTON","position":6,"cik":"0001219043","reported_name":"BYBEE CLINTON","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32074,"kind":"person","name":"NELSEN ROBERT","position":7,"cik":"0001219042","reported_name":"NELSEN ROBERT","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2017-12-13T16:25:35.000Z","date":"2017-12-11","kind":"purchase","acquired":true,"shares":266000,"price":15,"value":3990000.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F4","text":"Reflects shares purchased in the Issuer's initial public offering."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F3","text":"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."}],"balance_after":1537684,"source":{"system":"sec-edgar","filing":"0001104659-17-073156","document":"a4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1222135/000110465917073156/a4.xml","form_type":"4"}},{"id":4133119,"issuer":{"id":6649,"kind":"organization","name":"Quanterix Corp","symbol":"QTRX"},"owners":[{"id":145090,"kind":"organization","name":"ARCH VENTURE FUND VI LP","position":1,"cik":"0001222135","reported_name":"ARCH VENTURE FUND VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73815,"kind":"organization","name":"ARCH Venture Fund VIII Overage, L.P.","position":2,"cik":"0001617237","reported_name":"ARCH Venture Fund VIII Overage, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145091,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LP","position":3,"cik":"0001274410","reported_name":"ARCH VENTURE PARTNERS VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145092,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LLC","position":4,"cik":"0001274412","reported_name":"ARCH VENTURE PARTNERS VI LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73814,"kind":"organization","name":"ARCH Venture Partners VIII, LLC","position":5,"cik":"0001616165","reported_name":"ARCH Venture Partners VIII, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32073,"kind":"person","name":"BYBEE CLINTON","position":6,"cik":"0001219043","reported_name":"BYBEE CLINTON","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32074,"kind":"person","name":"NELSEN ROBERT","position":7,"cik":"0001219042","reported_name":"NELSEN ROBERT","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2017-12-13T16:25:35.000Z","date":"2017-12-11","kind":"exercise","acquired":true,"shares":1271684,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"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."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F3","text":"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."}],"balance_after":1271684,"source":{"system":"sec-edgar","filing":"0001104659-17-073156","document":"a4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1222135/000110465917073156/a4.xml","form_type":"4"}},{"id":4133118,"issuer":{"id":6649,"kind":"organization","name":"Quanterix Corp","symbol":"QTRX"},"owners":[{"id":145090,"kind":"organization","name":"ARCH VENTURE FUND VI LP","position":1,"cik":"0001222135","reported_name":"ARCH VENTURE FUND VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73815,"kind":"organization","name":"ARCH Venture Fund VIII Overage, L.P.","position":2,"cik":"0001617237","reported_name":"ARCH Venture Fund VIII Overage, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145091,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LP","position":3,"cik":"0001274410","reported_name":"ARCH VENTURE PARTNERS VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145092,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LLC","position":4,"cik":"0001274412","reported_name":"ARCH VENTURE PARTNERS VI LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73814,"kind":"organization","name":"ARCH Venture Partners VIII, LLC","position":5,"cik":"0001616165","reported_name":"ARCH Venture Partners VIII, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32073,"kind":"person","name":"BYBEE CLINTON","position":6,"cik":"0001219043","reported_name":"BYBEE CLINTON","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32074,"kind":"person","name":"NELSEN ROBERT","position":7,"cik":"0001219042","reported_name":"NELSEN ROBERT","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2017-12-13T16:25:35.000Z","date":"2017-12-11","kind":"exercise","acquired":true,"shares":381507,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"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."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"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."}],"balance_after":2412001,"source":{"system":"sec-edgar","filing":"0001104659-17-073156","document":"a4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1222135/000110465917073156/a4.xml","form_type":"4"}},{"id":4133117,"issuer":{"id":6649,"kind":"organization","name":"Quanterix Corp","symbol":"QTRX"},"owners":[{"id":145090,"kind":"organization","name":"ARCH VENTURE FUND VI LP","position":1,"cik":"0001222135","reported_name":"ARCH VENTURE FUND VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73815,"kind":"organization","name":"ARCH Venture Fund VIII Overage, L.P.","position":2,"cik":"0001617237","reported_name":"ARCH Venture Fund VIII Overage, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145091,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LP","position":3,"cik":"0001274410","reported_name":"ARCH VENTURE PARTNERS VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145092,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LLC","position":4,"cik":"0001274412","reported_name":"ARCH VENTURE PARTNERS VI LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73814,"kind":"organization","name":"ARCH Venture Partners VIII, LLC","position":5,"cik":"0001616165","reported_name":"ARCH Venture Partners VIII, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32073,"kind":"person","name":"BYBEE CLINTON","position":6,"cik":"0001219043","reported_name":"BYBEE CLINTON","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32074,"kind":"person","name":"NELSEN ROBERT","position":7,"cik":"0001219042","reported_name":"NELSEN ROBERT","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2017-12-13T16:25:35.000Z","date":"2017-12-11","kind":"exercise","acquired":true,"shares":109769,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"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."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"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."}],"balance_after":2030494,"source":{"system":"sec-edgar","filing":"0001104659-17-073156","document":"a4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1222135/000110465917073156/a4.xml","form_type":"4"}},{"id":4133116,"issuer":{"id":6649,"kind":"organization","name":"Quanterix Corp","symbol":"QTRX"},"owners":[{"id":145090,"kind":"organization","name":"ARCH VENTURE FUND VI LP","position":1,"cik":"0001222135","reported_name":"ARCH VENTURE FUND VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73815,"kind":"organization","name":"ARCH Venture Fund VIII Overage, L.P.","position":2,"cik":"0001617237","reported_name":"ARCH Venture Fund VIII Overage, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145091,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LP","position":3,"cik":"0001274410","reported_name":"ARCH VENTURE PARTNERS VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145092,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LLC","position":4,"cik":"0001274412","reported_name":"ARCH VENTURE PARTNERS VI LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73814,"kind":"organization","name":"ARCH Venture Partners VIII, LLC","position":5,"cik":"0001616165","reported_name":"ARCH Venture Partners VIII, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32073,"kind":"person","name":"BYBEE CLINTON","position":6,"cik":"0001219043","reported_name":"BYBEE CLINTON","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32074,"kind":"person","name":"NELSEN ROBERT","position":7,"cik":"0001219042","reported_name":"NELSEN ROBERT","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2017-12-13T16:25:35.000Z","date":"2017-12-11","kind":"exercise","acquired":true,"shares":477042,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"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."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"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."}],"balance_after":1920725,"source":{"system":"sec-edgar","filing":"0001104659-17-073156","document":"a4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1222135/000110465917073156/a4.xml","form_type":"4"}},{"id":4133115,"issuer":{"id":6649,"kind":"organization","name":"Quanterix Corp","symbol":"QTRX"},"owners":[{"id":145090,"kind":"organization","name":"ARCH VENTURE FUND VI LP","position":1,"cik":"0001222135","reported_name":"ARCH VENTURE FUND VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73815,"kind":"organization","name":"ARCH Venture Fund VIII Overage, L.P.","position":2,"cik":"0001617237","reported_name":"ARCH Venture Fund VIII Overage, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145091,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LP","position":3,"cik":"0001274410","reported_name":"ARCH VENTURE PARTNERS VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145092,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LLC","position":4,"cik":"0001274412","reported_name":"ARCH VENTURE PARTNERS VI LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73814,"kind":"organization","name":"ARCH Venture Partners VIII, LLC","position":5,"cik":"0001616165","reported_name":"ARCH Venture Partners VIII, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32073,"kind":"person","name":"BYBEE CLINTON","position":6,"cik":"0001219043","reported_name":"BYBEE CLINTON","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32074,"kind":"person","name":"NELSEN ROBERT","position":7,"cik":"0001219042","reported_name":"NELSEN ROBERT","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2017-12-13T16:25:35.000Z","date":"2017-12-11","kind":"exercise","acquired":true,"shares":1045426,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"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."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"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."}],"balance_after":1443683,"source":{"system":"sec-edgar","filing":"0001104659-17-073156","document":"a4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1222135/000110465917073156/a4.xml","form_type":"4"}},{"id":4133114,"issuer":{"id":6649,"kind":"organization","name":"Quanterix Corp","symbol":"QTRX"},"owners":[{"id":145090,"kind":"organization","name":"ARCH VENTURE FUND VI LP","position":1,"cik":"0001222135","reported_name":"ARCH VENTURE FUND VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73815,"kind":"organization","name":"ARCH Venture Fund VIII Overage, L.P.","position":2,"cik":"0001617237","reported_name":"ARCH Venture Fund VIII Overage, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145091,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LP","position":3,"cik":"0001274410","reported_name":"ARCH VENTURE PARTNERS VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145092,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LLC","position":4,"cik":"0001274412","reported_name":"ARCH VENTURE PARTNERS VI LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73814,"kind":"organization","name":"ARCH Venture Partners VIII, LLC","position":5,"cik":"0001616165","reported_name":"ARCH Venture Partners VIII, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32073,"kind":"person","name":"BYBEE CLINTON","position":6,"cik":"0001219043","reported_name":"BYBEE CLINTON","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32074,"kind":"person","name":"NELSEN ROBERT","position":7,"cik":"0001219042","reported_name":"NELSEN ROBERT","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2017-12-13T16:25:35.000Z","date":"2017-12-11","kind":"exercise","acquired":true,"shares":398257,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"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."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"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."}],"balance_after":398257,"source":{"system":"sec-edgar","filing":"0001104659-17-073156","document":"a4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1222135/000110465917073156/a4.xml","form_type":"4"}},{"id":4580237,"issuer":{"id":181654,"kind":"organization","name":"XTERA COMMUNICATIONS, INC.","symbol":"XCOM"},"owners":[{"id":145090,"kind":"organization","name":"ARCH VENTURE FUND VI LP","position":1,"cik":"0001222135","reported_name":"ARCH VENTURE FUND VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145091,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LP","position":2,"cik":"0001274410","reported_name":"ARCH VENTURE PARTNERS VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145092,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LLC","position":3,"cik":"0001274412","reported_name":"ARCH VENTURE PARTNERS VI LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32072,"kind":"person","name":"CRANDELL KEITH","position":4,"cik":"0001219039","reported_name":"CRANDELL KEITH","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32074,"kind":"person","name":"NELSEN ROBERT","position":5,"cik":"0001219042","reported_name":"NELSEN ROBERT","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Warrants to Purchase Common Stock","published_at":"2016-10-13T16:02:09.000Z","date":"2016-10-11","kind":"purchase","acquired":true,"shares":83500,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"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"},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"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."}],"balance_after":500167,"derivative":{"exercise_price":0.61,"exercise_date":"2016-10-11","expiration_date":"2026-10-11","underlying":"Common Stock","underlying_shares":83500},"source":{"system":"sec-edgar","filing":"0001209191-16-145790","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1122051/000120919116145790/doc4.xml","form_type":"4"}},{"id":4593536,"issuer":{"id":181654,"kind":"organization","name":"XTERA COMMUNICATIONS, INC.","symbol":"XCOM"},"owners":[{"id":145090,"kind":"organization","name":"ARCH VENTURE FUND VI LP","position":1,"cik":"0001222135","reported_name":"ARCH VENTURE FUND VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145091,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LP","position":2,"cik":"0001274410","reported_name":"ARCH VENTURE PARTNERS VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145092,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LLC","position":3,"cik":"0001274412","reported_name":"ARCH VENTURE PARTNERS VI LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32072,"kind":"person","name":"CRANDELL KEITH","position":4,"cik":"0001219039","reported_name":"CRANDELL KEITH","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32074,"kind":"person","name":"NELSEN ROBERT","position":5,"cik":"0001219042","reported_name":"NELSEN ROBERT","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Warrants to Purchase Common Stock","published_at":"2016-09-28T16:13:00.000Z","date":"2016-09-27","kind":"purchase","acquired":true,"shares":250000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"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"},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"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."}],"balance_after":416667,"derivative":{"exercise_price":0.61,"exercise_date":"2016-09-27","expiration_date":"2026-09-27","underlying":"Common Stock","underlying_shares":250000},"source":{"system":"sec-edgar","filing":"0001209191-16-142995","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1122051/000120919116142995/doc4.xml","form_type":"4"}},{"id":4602662,"issuer":{"id":181654,"kind":"organization","name":"XTERA COMMUNICATIONS, INC.","symbol":"XCOM"},"owners":[{"id":145090,"kind":"organization","name":"ARCH VENTURE FUND VI LP","position":1,"cik":"0001222135","reported_name":"ARCH VENTURE FUND VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145091,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LP","position":2,"cik":"0001274410","reported_name":"ARCH VENTURE PARTNERS VI LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":145092,"kind":"organization","name":"ARCH VENTURE PARTNERS VI LLC","position":3,"cik":"0001274412","reported_name":"ARCH VENTURE PARTNERS VI LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32072,"kind":"person","name":"CRANDELL KEITH","position":4,"cik":"0001219039","reported_name":"CRANDELL KEITH","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32074,"kind":"person","name":"NELSEN ROBERT","position":5,"cik":"0001219042","reported_name":"NELSEN ROBERT","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Warrants to Purchase Common Stock","published_at":"2016-09-15T14:26:19.000Z","date":"2016-09-13","kind":"purchase","acquired":true,"shares":166667,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"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"},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"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."}],"balance_after":166667,"derivative":{"exercise_price":0.6,"exercise_date":"2016-09-13","expiration_date":"2026-09-13","underlying":"Common Stock","underlying_shares":166667},"source":{"system":"sec-edgar","filing":"0001209191-16-141532","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1122051/000120919116141532/doc4.xml","form_type":"4"}}]}