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AVP X LP and AVP X Overage LP may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, respectively, AVP X LLC may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, and each of the AVP X Committee Members may be deemed to share the power to direct the disposition and vote of the shares held by ARCH X and ARCH X Overage."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"(Continued from Footnote 2) AVP X LP, AVP X Overage LP, AVP X LLC, and the AVP X Committee Members each disclaim beneficial ownership except to any pecuniary interest therein."}],"balance_after":0,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":2833333},"source":{"system":"sec-edgar","filing":"0000899243-21-029077","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1761918/000089924321029077/doc4.xml","form_type":"4"}},{"id":2629311,"issuer":{"id":3796,"kind":"organization","name":"Erasca, Inc."},"owners":[{"id":32128,"kind":"organization","name":"ARCH Venture Partners X, LLC","position":1,"cik":"0001769012","reported_name":"ARCH Venture Partners X, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73809,"kind":"organization","name":"ARCH Venture Fund X, L.P.","position":2,"cik":"0001757011","reported_name":"ARCH Venture Fund X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32123,"kind":"organization","name":"ARCH Venture Fund X Overage, L.P.","position":3,"cik":"0001757017","reported_name":"ARCH Venture Fund X Overage, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73810,"kind":"organization","name":"ARCH Venture Partners X, L.P.","position":4,"cik":"0001782583","reported_name":"ARCH Venture Partners X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32126,"kind":"organization","name":"ARCH Venture Partners X Overage, L.P.","position":5,"cik":"0001768905","reported_name":"ARCH Venture Partners X Overage, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32074,"kind":"person","name":"NELSEN ROBERT","position":6,"cik":"0001219042","reported_name":"NELSEN ROBERT","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32072,"kind":"person","name":"CRANDELL KEITH","position":7,"cik":"0001219039","reported_name":"CRANDELL KEITH","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32075,"kind":"person","name":"Burow Kristina","position":8,"cik":"0001569248","reported_name":"Burow Kristina","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32071,"kind":"person","name":"GILLIS STEVEN","position":9,"cik":"0001229592","reported_name":"GILLIS STEVEN","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A Preferred Stock","published_at":"2021-07-21T00:53:08.000Z","date":"2021-07-20","kind":"exercise","acquired":false,"shares":2100000,"ownership":{"direct":false,"nature":"By ARCH Venture Fund X Overage, L.P."},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares of the Issuer's Series A and Series B Preferred Stock automatically converted into shares of the Issuer's Common Stock, for no additional consideration, at a ratio of 1.2-for-1 share, immediately prior to the consummation of the Issuer's initial public offering."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The shares of the Issuer's Series A and Series B Preferred Stock automatically converted into shares of the Issuer's Common Stock, for no additional consideration, at a ratio of 1.2-for-1 share, immediately prior to the consummation of the Issuer's initial public offering."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The shares of the Issuer's Series A and Series B Preferred Stock automatically converted into shares of the Issuer's Common Stock, for no additional consideration, at a ratio of 1.2-for-1 share, immediately prior to the consummation of the Issuer's initial public offering."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"ARCH Venture Partners X, L.P. 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AVP IX LP, AVP IX Overage LP, AVP IX LLC, and the AVP IX MDs each disclaim beneficial ownership except to to the extent of any pecuniary interest therein."}],"balance_after":10301250,"source":{"system":"sec-edgar","filing":"0000899243-21-005752","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1757011/000089924321005752/doc4.xml","form_type":"4"}},{"id":2869351,"issuer":{"id":4870,"kind":"organization","name":"Sana Biotechnology, Inc.","symbol":"SANA"},"owners":[{"id":73809,"kind":"organization","name":"ARCH Venture Fund X, L.P.","position":1,"cik":"0001757011","reported_name":"ARCH Venture Fund X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32121,"kind":"organization","name":"ARCH Venture Fund IX, L.P.","position":2,"cik":"0001666306","reported_name":"ARCH Venture Fund IX, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32122,"kind":"organization","name":"ARCH Venture Fund IX Overage, L.P.","position":3,"cik":"0001666307","reported_name":"ARCH Venture Fund IX Overage, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32123,"kind":"organization","name":"ARCH Venture Fund X Overage, L.P.","position":4,"cik":"0001757017","reported_name":"ARCH Venture Fund X Overage, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32124,"kind":"organization","name":"ARCH Venture Partners IX, L.P.","position":5,"cik":"0001723173","reported_name":"ARCH Venture Partners IX, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32125,"kind":"organization","name":"ARCH Venture Partners IX Overage, L.P.","position":6,"cik":"0001723172","reported_name":"ARCH Venture Partners IX Overage, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":73810,"kind":"organization","name":"ARCH Venture Partners X, L.P.","position":7,"cik":"0001782583","reported_name":"ARCH Venture Partners X, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32126,"kind":"organization","name":"ARCH Venture Partners X Overage, L.P.","position":8,"cik":"0001768905","reported_name":"ARCH Venture Partners X Overage, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32127,"kind":"organization","name":"ARCH Venture Partners IX, LLC","position":9,"cik":"0001723174","reported_name":"ARCH Venture Partners IX, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32128,"kind":"organization","name":"ARCH Venture Partners X, LLC","position":10,"cik":"0001769012","reported_name":"ARCH Venture Partners X, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2021-02-10T19:20:35.000Z","date":"2021-02-08","kind":"exercise","acquired":true,"shares":10156250,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares of Issuer's Preferred Stock automatically converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-1 basis immediately prior to the consummation of Issuer's initial public offering."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Represents shares held directly by ARCH Venture Fund IX, L.P. (ARCH IX).  ARCH Venture Partners IX, L.P. (AVP IX LP) is the sole general partner of ARCH IX."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"ARCH Venture Partners IX, LLC (AVP IX LLC) is the sole general partner of each of AVP IX LP and AVP IX Overage LP. Keith Crandell and Clinton Bybee are managing directors of AVP IX LLC (the AVP IX MDs). AVP IX LP and AVP IX Overage LP may be deemed to beneficially own the shares held by ARCH IX and ARCH IX Overage, respectively, AVP IX LLC may be deemed to beneficially own the shares held by ARCH IX and ARCH IX Overage, and each of the AVP IX MDs may be deemed to share the power to direct the disposition and vote of the shares held by ARCH IX and ARCH IX Overage. AVP IX LP, AVP IX Overage LP, AVP IX LLC, and the AVP IX MDs each disclaim beneficial ownership except to to the extent of any pecuniary interest therein."}],"balance_after":10303750,"source":{"system":"sec-edgar","filing":"0000899243-21-005752","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1757011/000089924321005752/doc4.xml","form_type":"4"}},{"id":3632260,"issuer":{"id":154554,"kind":"organization","name":"Sienna Biopharmaceuticals, Inc.","symbol":"SNNA"},"owners":[{"id":32128,"kind":"organization","name":"ARCH Venture Partners X, LLC","position":1,"cik":"0001769012","reported_name":"ARCH Venture Partners X, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32123,"kind":"organization","name":"ARCH Venture Fund X Overage, L.P.","position":2,"cik":"0001757017","reported_name":"ARCH Venture Fund X Overage, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32126,"kind":"organization","name":"ARCH Venture Partners X Overage, L.P.","position":3,"cik":"0001768905","reported_name":"ARCH Venture Partners X Overage, L.P.","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}},{"id":32071,"kind":"person","name":"GILLIS STEVEN","position":6,"cik":"0001229592","reported_name":"GILLIS STEVEN","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2019-02-26T21:08:47.000Z","date":"2019-02-22","kind":"purchase","acquired":true,"shares":1865800,"price":2.5,"value":4664500.0,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"Following the transactions reported herein, includes 1,032,493 shares of common stock held of record by ARCH Venture Fund VIII Overage, L.P. (\"ARCH Fund Overage\"), 2,900,575 shares of common stock held of record by ARCH Venture Fund VIII, L.P. (\"ARCH Fund VIII\"), and 1,865,800 shares of common stock held of record by ARCH Venture Fund X Overage, L.P. (\"ARCH X Overage\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"The sole general Partner of ARCH X Overage is ARCH Venture Partners X Overage, L.P. (\"AVP X Over GP\").  The sole general partner of AVP X Over GP is ARCH Venture Partners X, LLC (\"AVP X LLC\").  AVP X Over LP and AVP X LLC may therefore be deemed to beneficially own the securities held by ARCH X Overage.  AVP X Over GP and AVP X LLC disclaim beneficial ownership of such securities, except to the extent of any pecuniary interest therein.  Keith L. Crandell, Robert Nelsen and Steven Gillis are managing directors of AVP X LLC, and they may be deemed to beneficially own the shares held by ARCH X Overage.  Messrs. Crandell, Nelsen and Gillis disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein."}],"balance_after":1865800,"source":{"system":"sec-edgar","filing":"0001012975-19-000199","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1656328/000101297519000199/edgar.xml","form_type":"4"}},{"id":3632259,"issuer":{"id":154554,"kind":"organization","name":"Sienna Biopharmaceuticals, Inc.","symbol":"SNNA"},"owners":[{"id":32128,"kind":"organization","name":"ARCH Venture Partners X, LLC","position":1,"cik":"0001769012","reported_name":"ARCH Venture Partners X, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32123,"kind":"organization","name":"ARCH Venture Fund X Overage, L.P.","position":2,"cik":"0001757017","reported_name":"ARCH Venture Fund X Overage, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32126,"kind":"organization","name":"ARCH Venture Partners X Overage, L.P.","position":3,"cik":"0001768905","reported_name":"ARCH Venture Partners X Overage, L.P.","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}},{"id":32071,"kind":"person","name":"GILLIS STEVEN","position":6,"cik":"0001229592","reported_name":"GILLIS STEVEN","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2019-02-26T21:08:47.000Z","date":"2019-02-22","kind":"purchase","acquired":true,"shares":150000,"price":2.5,"value":375000.0,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"Following the transactions reported herein, includes 1,032,493 shares of common stock held of record by ARCH Venture Fund VIII Overage, L.P. (\"ARCH Fund Overage\"), 2,900,575 shares of common stock held of record by ARCH Venture Fund VIII, L.P. (\"ARCH Fund VIII\"), and 1,865,800 shares of common stock held of record by ARCH Venture Fund X Overage, L.P. (\"ARCH X Overage\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The sole general partner of ARCH Fund VIII is ARCH Venture Partners VIII, L.P. (\"ARCH Partners VIII\"). The sole general partner of ARCH Partners VIII and ARCH Fund Overage is ARCH Venture Partners VIII, LLC (\"ARCH VIII LLC\"). ARCH Partners VIII may therefore be deemed to beneficially own the securities held by ARCH Fund VIII and ARCH VIII LLC may be deemed to beneficially own the securities held by ARCH Fund VIII and ARCH Fund Overage. ARCH Partners VIII and ARCH VIII LLC disclaim beneficial ownership of such securities, except to the extent of any pecuniary interest therein. The managing directors of ARCH VIII LLC are Keith L. Crandell, Clinton Bybee and Robert Nelsen, and they may be deemed to beneficially own the shares held by ARCH Fund VIII and ARCH Fund Overage. Messrs. Crandell, Bybee and Nelsen disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein."}],"balance_after":1032493,"source":{"system":"sec-edgar","filing":"0001012975-19-000199","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1656328/000101297519000199/edgar.xml","form_type":"4"}},{"id":3632258,"issuer":{"id":154554,"kind":"organization","name":"Sienna Biopharmaceuticals, Inc.","symbol":"SNNA"},"owners":[{"id":32128,"kind":"organization","name":"ARCH Venture Partners X, LLC","position":1,"cik":"0001769012","reported_name":"ARCH Venture Partners X, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32123,"kind":"organization","name":"ARCH Venture Fund X Overage, L.P.","position":2,"cik":"0001757017","reported_name":"ARCH Venture Fund X Overage, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":32126,"kind":"organization","name":"ARCH Venture Partners X Overage, L.P.","position":3,"cik":"0001768905","reported_name":"ARCH Venture Partners X Overage, L.P.","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}},{"id":32071,"kind":"person","name":"GILLIS STEVEN","position":6,"cik":"0001229592","reported_name":"GILLIS STEVEN","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2019-02-26T21:08:47.000Z","date":"2019-02-22","kind":"purchase","acquired":true,"shares":150000,"price":2.5,"value":375000.0,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"Following the transactions reported herein, includes 1,032,493 shares of common stock held of record by ARCH Venture Fund VIII Overage, L.P. (\"ARCH Fund Overage\"), 2,900,575 shares of common stock held of record by ARCH Venture Fund VIII, L.P. (\"ARCH Fund VIII\"), and 1,865,800 shares of common stock held of record by ARCH Venture Fund X Overage, L.P. (\"ARCH X Overage\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The sole general partner of ARCH Fund VIII is ARCH Venture Partners VIII, L.P. (\"ARCH Partners VIII\"). The sole general partner of ARCH Partners VIII and ARCH Fund Overage is ARCH Venture Partners VIII, LLC (\"ARCH VIII LLC\"). ARCH Partners VIII may therefore be deemed to beneficially own the securities held by ARCH Fund VIII and ARCH VIII LLC may be deemed to beneficially own the securities held by ARCH Fund VIII and ARCH Fund Overage. ARCH Partners VIII and ARCH VIII LLC disclaim beneficial ownership of such securities, except to the extent of any pecuniary interest therein. The managing directors of ARCH VIII LLC are Keith L. Crandell, Clinton Bybee and Robert Nelsen, and they may be deemed to beneficially own the shares held by ARCH Fund VIII and ARCH Fund Overage. Messrs. Crandell, Bybee and Nelsen disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein."}],"balance_after":2900575,"source":{"system":"sec-edgar","filing":"0001012975-19-000199","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1656328/000101297519000199/edgar.xml","form_type":"4"}}]}