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The individual managing directors of Alta Management VIII disclaim beneficial ownership of all shares held by Alta VIII, except to the extent of their pecuniary interests therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":458331},"source":{"system":"sec-edgar","filing":"0001209191-18-052831","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1198321/000120919118052831/doc4.xml","form_type":"4"}},{"id":3804121,"issuer":{"id":5797,"kind":"organization","name":"SUTRO BIOPHARMA, INC.","symbol":"STRO"},"owners":[{"id":110408,"kind":"organization","name":"Alta Partners VIII, L.P.","position":1,"cik":"0001399763","reported_name":"Alta Partners VIII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":110407,"kind":"organization","name":"Alta Partners Management VIII, LLC","position":2,"cik":"0001399894","reported_name":"Alta Partners Management VIII, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":143450,"kind":"person","name":"CHAMPSI FARAH","position":3,"cik":"0001198321","reported_name":"CHAMPSI FARAH","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63327,"kind":"person","name":"JANNEY DANIEL","position":4,"cik":"0001198325","reported_name":"JANNEY DANIEL","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39204,"kind":"person","name":"NOHRA GUY P","position":5,"cik":"0001198330","reported_name":"NOHRA GUY P","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series B Preferred Stock","published_at":"2018-10-01T17:12:29.000Z","date":"2018-10-01","kind":"exercise","acquired":false,"shares":10201769,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each share of the issuer's Series B Preferred Stock automatically converted into 0.0578 share of the issuer's Common Stock on October 1, 2018 in connection with the closing of the issuer's sale of its Common Stock in its firm commitment initial public offering (the \"IPO\") pursuant to a registration statement on Form S-1 (File No. 333-227103) under the Securities Act of 1933, as amended (the \"Registration Statement\"), and had no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Each share of the issuer's Series B Preferred Stock automatically converted into 0.0578 share of the issuer's Common Stock on October 1, 2018 in connection with the closing of the issuer's sale of its Common Stock in its firm commitment initial public offering (the \"IPO\") pursuant to a registration statement on Form S-1 (File No. 333-227103) under the Securities Act of 1933, as amended (the \"Registration Statement\"), and had no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Each share of the issuer's Series B Preferred Stock automatically converted into 0.0578 share of the issuer's Common Stock on October 1, 2018 in connection with the closing of the issuer's sale of its Common Stock in its firm commitment initial public offering (the \"IPO\") pursuant to a registration statement on Form S-1 (File No. 333-227103) under the Securities Act of 1933, as amended (the \"Registration Statement\"), and had no expiration date."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The shares directly held by Alta Partners VIII, L.P. (\"Alta VIII\") are indirectly held by Alta Partners Management VIII, LLC (\"Alta Management VIII\"), which is the general partner of Alta VIII. The individual managing directors of Alta Management VIII are Farah Champsi, Guy Nohra and Daniel Janney. The managing directors of Alta Management VIII exercise sole voting and investment control with respect to the shares held by Alta VIII. The individual managing directors of Alta Management VIII disclaim beneficial ownership of all shares held by Alta VIII, except to the extent of their pecuniary interests therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":589661},"source":{"system":"sec-edgar","filing":"0001209191-18-052831","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1198321/000120919118052831/doc4.xml","form_type":"4"}},{"id":3804120,"issuer":{"id":5797,"kind":"organization","name":"SUTRO BIOPHARMA, INC.","symbol":"STRO"},"owners":[{"id":110408,"kind":"organization","name":"Alta Partners VIII, L.P.","position":1,"cik":"0001399763","reported_name":"Alta Partners VIII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":110407,"kind":"organization","name":"Alta Partners Management VIII, LLC","position":2,"cik":"0001399894","reported_name":"Alta Partners Management VIII, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":143450,"kind":"person","name":"CHAMPSI FARAH","position":3,"cik":"0001198321","reported_name":"CHAMPSI FARAH","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63327,"kind":"person","name":"JANNEY DANIEL","position":4,"cik":"0001198325","reported_name":"JANNEY DANIEL","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39204,"kind":"person","name":"NOHRA GUY P","position":5,"cik":"0001198330","reported_name":"NOHRA GUY P","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-10-01T17:12:29.000Z","date":"2018-10-01","kind":"exercise","acquired":true,"shares":514211,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F5","text":"Each share of the issuer's Series E Preferred Stock automatically converted into 0.0275 share of the issuer's Common Stock on October 1, 2018 in connection with the closing of the issuer's sale of its Common Stock in its IPO pursuant to the Registration Statement, and had no expiration date."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The shares directly held by Alta Partners VIII, L.P. (\"Alta VIII\") are indirectly held by Alta Partners Management VIII, LLC (\"Alta Management VIII\"), which is the general partner of Alta VIII. The individual managing directors of Alta Management VIII are Farah Champsi, Guy Nohra and Daniel Janney. The managing directors of Alta Management VIII exercise sole voting and investment control with respect to the shares held by Alta VIII. The individual managing directors of Alta Management VIII disclaim beneficial ownership of all shares held by Alta VIII, except to the extent of their pecuniary interests therein."}],"balance_after":1944901,"source":{"system":"sec-edgar","filing":"0001209191-18-052831","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1198321/000120919118052831/doc4.xml","form_type":"4"}},{"id":3804119,"issuer":{"id":5797,"kind":"organization","name":"SUTRO BIOPHARMA, INC.","symbol":"STRO"},"owners":[{"id":110408,"kind":"organization","name":"Alta Partners VIII, L.P.","position":1,"cik":"0001399763","reported_name":"Alta Partners VIII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":110407,"kind":"organization","name":"Alta Partners Management VIII, LLC","position":2,"cik":"0001399894","reported_name":"Alta Partners Management VIII, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":143450,"kind":"person","name":"CHAMPSI FARAH","position":3,"cik":"0001198321","reported_name":"CHAMPSI FARAH","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63327,"kind":"person","name":"JANNEY DANIEL","position":4,"cik":"0001198325","reported_name":"JANNEY DANIEL","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39204,"kind":"person","name":"NOHRA GUY P","position":5,"cik":"0001198330","reported_name":"NOHRA GUY P","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-10-01T17:12:29.000Z","date":"2018-10-01","kind":"exercise","acquired":true,"shares":382698,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"Each share of the issuer's Series D Preferred Stock automatically converted into 0.0405 share of the issuer's Common Stock on October 1, 2018 in connection with the closing of the issuer's sale of its Common Stock in its IPO pursuant to the Registration Statement, and had no expiration date."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The shares directly held by Alta Partners VIII, L.P. (\"Alta VIII\") are indirectly held by Alta Partners Management VIII, LLC (\"Alta Management VIII\"), which is the general partner of Alta VIII. The individual managing directors of Alta Management VIII are Farah Champsi, Guy Nohra and Daniel Janney. The managing directors of Alta Management VIII exercise sole voting and investment control with respect to the shares held by Alta VIII. The individual managing directors of Alta Management VIII disclaim beneficial ownership of all shares held by Alta VIII, except to the extent of their pecuniary interests therein."}],"balance_after":1430690,"source":{"system":"sec-edgar","filing":"0001209191-18-052831","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1198321/000120919118052831/doc4.xml","form_type":"4"}},{"id":3804118,"issuer":{"id":5797,"kind":"organization","name":"SUTRO BIOPHARMA, INC.","symbol":"STRO"},"owners":[{"id":110408,"kind":"organization","name":"Alta Partners VIII, L.P.","position":1,"cik":"0001399763","reported_name":"Alta Partners VIII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":110407,"kind":"organization","name":"Alta Partners Management VIII, LLC","position":2,"cik":"0001399894","reported_name":"Alta Partners Management VIII, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":143450,"kind":"person","name":"CHAMPSI FARAH","position":3,"cik":"0001198321","reported_name":"CHAMPSI FARAH","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63327,"kind":"person","name":"JANNEY DANIEL","position":4,"cik":"0001198325","reported_name":"JANNEY DANIEL","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39204,"kind":"person","name":"NOHRA GUY P","position":5,"cik":"0001198330","reported_name":"NOHRA GUY P","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-10-01T17:12:29.000Z","date":"2018-10-01","kind":"exercise","acquired":true,"shares":458331,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Each share of the issuer's Series C Preferred Stock automatically converted into 0.0370 share of the issuer's Common Stock on October 1, 2018 in connection with the closing of the issuer's sale of its Common Stock in its IPO pursuant to the Registration Statement, and had no expiration date."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The shares directly held by Alta Partners VIII, L.P. (\"Alta VIII\") are indirectly held by Alta Partners Management VIII, LLC (\"Alta Management VIII\"), which is the general partner of Alta VIII. The individual managing directors of Alta Management VIII are Farah Champsi, Guy Nohra and Daniel Janney. The managing directors of Alta Management VIII exercise sole voting and investment control with respect to the shares held by Alta VIII. The individual managing directors of Alta Management VIII disclaim beneficial ownership of all shares held by Alta VIII, except to the extent of their pecuniary interests therein."}],"balance_after":1047992,"source":{"system":"sec-edgar","filing":"0001209191-18-052831","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1198321/000120919118052831/doc4.xml","form_type":"4"}},{"id":3804117,"issuer":{"id":5797,"kind":"organization","name":"SUTRO BIOPHARMA, INC.","symbol":"STRO"},"owners":[{"id":110408,"kind":"organization","name":"Alta Partners VIII, L.P.","position":1,"cik":"0001399763","reported_name":"Alta Partners VIII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":110407,"kind":"organization","name":"Alta Partners Management VIII, LLC","position":2,"cik":"0001399894","reported_name":"Alta Partners Management VIII, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":143450,"kind":"person","name":"CHAMPSI FARAH","position":3,"cik":"0001198321","reported_name":"CHAMPSI FARAH","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63327,"kind":"person","name":"JANNEY DANIEL","position":4,"cik":"0001198325","reported_name":"JANNEY DANIEL","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39204,"kind":"person","name":"NOHRA GUY P","position":5,"cik":"0001198330","reported_name":"NOHRA GUY P","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-10-01T17:12:29.000Z","date":"2018-10-01","kind":"exercise","acquired":true,"shares":589661,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each share of the issuer's Series B Preferred Stock automatically converted into 0.0578 share of the issuer's Common Stock on October 1, 2018 in connection with the closing of the issuer's sale of its Common Stock in its firm commitment initial public offering (the \"IPO\") pursuant to a registration statement on Form S-1 (File No. 333-227103) under the Securities Act of 1933, as amended (the \"Registration Statement\"), and had no expiration date."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The shares directly held by Alta Partners VIII, L.P. (\"Alta VIII\") are indirectly held by Alta Partners Management VIII, LLC (\"Alta Management VIII\"), which is the general partner of Alta VIII. The individual managing directors of Alta Management VIII are Farah Champsi, Guy Nohra and Daniel Janney. The managing directors of Alta Management VIII exercise sole voting and investment control with respect to the shares held by Alta VIII. The individual managing directors of Alta Management VIII disclaim beneficial ownership of all shares held by Alta VIII, except to the extent of their pecuniary interests therein."}],"balance_after":589661,"source":{"system":"sec-edgar","filing":"0001209191-18-052831","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1198321/000120919118052831/doc4.xml","form_type":"4"}},{"id":3862976,"issuer":{"id":79644,"kind":"organization","name":"Allakos Inc.","symbol":"ALLK"},"owners":[{"id":110408,"kind":"organization","name":"Alta Partners VIII, L.P.","position":1,"cik":"0001399763","reported_name":"Alta Partners VIII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":110407,"kind":"organization","name":"Alta Partners Management VIII, LLC","position":2,"cik":"0001399894","reported_name":"Alta Partners Management VIII, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":144083,"kind":"organization","name":"Alta Partners NextGen Fund I Management, LLC","position":3,"cik":"0001736001","reported_name":"Alta Partners NextGen Fund I Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":144084,"kind":"organization","name":"Alta Partners NextGen Fund I, L.P.","position":4,"cik":"0001698110","reported_name":"Alta Partners NextGen Fund I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":143450,"kind":"person","name":"CHAMPSI FARAH","position":5,"cik":"0001198321","reported_name":"CHAMPSI FARAH","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135397,"kind":"person","name":"Hudson Peter A","position":6,"cik":"0001674884","reported_name":"Hudson Peter A","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":24127,"kind":"person","name":"MORE ROBERT J","position":7,"cik":"0001207792","reported_name":"MORE ROBERT J","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39204,"kind":"person","name":"NOHRA GUY P","position":8,"cik":"0001198330","reported_name":"NOHRA GUY P","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series B Preferred Stock","published_at":"2018-07-23T17:01:38.000Z","date":"2018-07-23","kind":"exercise","acquired":false,"shares":1239007,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The Series B Preferred Stock automatically converted into Common Stock on a one-for-one basis immediately prior to the closing of the Issuer's initial public offering and had no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The Series B Preferred Stock automatically converted into Common Stock on a one-for-one basis immediately prior to the closing of the Issuer's initial public offering and had no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The Series B Preferred Stock automatically converted into Common Stock on a one-for-one basis immediately prior to the closing of the Issuer's initial public offering and had no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The shares directly held by Alta VIII are indirectly held by Alta Partners Management VIII, LLC (\"Alta Management VIII\"), which is the general partner of Alta VIII. The individual managing directors of Alta Management VIII are Farah Champsi, Guy Nohra and Daniel Janney. The managing directors of Alta Management VIII exercise sole voting and investment control with respect to the shares held by Alta VIII. The individual managing directors of Alta Management VIII disclaim beneficial ownership of all shares held by Alta VIII, except to the extent of their pecuniary interests therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"The shares directly held by APNG I are indirectly held by Alta Partners NextGen Fund I Management, LLC (\"APNG I Management\"), which is the general partner of APNG I. The individual managing directors of APNG I Management are Robert More, Peter Hudson and Daniel Janney. The managing directors of APNG I Management exercise sole voting and investment control with respect to the shares held by APNG I. The individual managing directors of APNG I Management disclaim beneficial ownership of all shares held by APNG I, except to the extent of their pecuniary interests therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F8","text":"APNG I owns 504,547 shares of Series B Preferred Stock. Alta VIII owns 734,460 shares of Series B Preferred Stock."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":1239007},"source":{"system":"sec-edgar","filing":"0001209191-18-043627","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1736001/000120919118043627/doc4.xml","form_type":"4"}},{"id":3862975,"issuer":{"id":79644,"kind":"organization","name":"Allakos Inc.","symbol":"ALLK"},"owners":[{"id":110408,"kind":"organization","name":"Alta Partners VIII, L.P.","position":1,"cik":"0001399763","reported_name":"Alta Partners VIII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":110407,"kind":"organization","name":"Alta Partners Management VIII, LLC","position":2,"cik":"0001399894","reported_name":"Alta Partners Management VIII, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":144083,"kind":"organization","name":"Alta Partners NextGen Fund I Management, LLC","position":3,"cik":"0001736001","reported_name":"Alta Partners NextGen Fund I Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":144084,"kind":"organization","name":"Alta Partners NextGen Fund I, L.P.","position":4,"cik":"0001698110","reported_name":"Alta Partners NextGen Fund I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":143450,"kind":"person","name":"CHAMPSI FARAH","position":5,"cik":"0001198321","reported_name":"CHAMPSI FARAH","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135397,"kind":"person","name":"Hudson Peter A","position":6,"cik":"0001674884","reported_name":"Hudson Peter A","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":24127,"kind":"person","name":"MORE ROBERT J","position":7,"cik":"0001207792","reported_name":"MORE ROBERT J","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39204,"kind":"person","name":"NOHRA GUY P","position":8,"cik":"0001198330","reported_name":"NOHRA GUY P","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A Preferred Stock","published_at":"2018-07-23T17:01:38.000Z","date":"2018-07-23","kind":"exercise","acquired":false,"shares":10030193,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The Series A Preferred Stock automatically converted into Common Stock on a one-for-one basis immediately prior to the closing of the Issuer's initial public offering and had no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The Series A Preferred Stock automatically converted into Common Stock on a one-for-one basis immediately prior to the closing of the Issuer's initial public offering and had no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The Series A Preferred Stock automatically converted into Common Stock on a one-for-one basis immediately prior to the closing of the Issuer's initial public offering and had no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The shares directly held by Alta VIII are indirectly held by Alta Partners Management VIII, LLC (\"Alta Management VIII\"), which is the general partner of Alta VIII. The individual managing directors of Alta Management VIII are Farah Champsi, Guy Nohra and Daniel Janney. The managing directors of Alta Management VIII exercise sole voting and investment control with respect to the shares held by Alta VIII. The individual managing directors of Alta Management VIII disclaim beneficial ownership of all shares held by Alta VIII, except to the extent of their pecuniary interests therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"The shares directly held by APNG I are indirectly held by Alta Partners NextGen Fund I Management, LLC (\"APNG I Management\"), which is the general partner of APNG I. The individual managing directors of APNG I Management are Robert More, Peter Hudson and Daniel Janney. The managing directors of APNG I Management exercise sole voting and investment control with respect to the shares held by APNG I. The individual managing directors of APNG I Management disclaim beneficial ownership of all shares held by APNG I, except to the extent of their pecuniary interests therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F7","text":"APNG I owns 2,941,718 shares of Series A Preferred Stock. Alta VIII owns 7,088,475 shares of Series A Preferred Stock."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":10030193},"source":{"system":"sec-edgar","filing":"0001209191-18-043627","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1736001/000120919118043627/doc4.xml","form_type":"4"}},{"id":3862974,"issuer":{"id":79644,"kind":"organization","name":"Allakos Inc.","symbol":"ALLK"},"owners":[{"id":110408,"kind":"organization","name":"Alta Partners VIII, L.P.","position":1,"cik":"0001399763","reported_name":"Alta Partners VIII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":110407,"kind":"organization","name":"Alta Partners Management VIII, LLC","position":2,"cik":"0001399894","reported_name":"Alta Partners Management VIII, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":144083,"kind":"organization","name":"Alta Partners NextGen Fund I Management, LLC","position":3,"cik":"0001736001","reported_name":"Alta Partners NextGen Fund I Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":144084,"kind":"organization","name":"Alta Partners NextGen Fund I, L.P.","position":4,"cik":"0001698110","reported_name":"Alta Partners NextGen Fund I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":143450,"kind":"person","name":"CHAMPSI FARAH","position":5,"cik":"0001198321","reported_name":"CHAMPSI FARAH","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135397,"kind":"person","name":"Hudson Peter A","position":6,"cik":"0001674884","reported_name":"Hudson Peter A","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":24127,"kind":"person","name":"MORE ROBERT J","position":7,"cik":"0001207792","reported_name":"MORE ROBERT J","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39204,"kind":"person","name":"NOHRA GUY P","position":8,"cik":"0001198330","reported_name":"NOHRA GUY P","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-07-23T17:01:38.000Z","date":"2018-07-23","kind":"purchase","acquired":true,"shares":250000,"price":18,"value":4500000.0,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The shares directly held by Alta VIII are indirectly held by Alta Partners Management VIII, LLC (\"Alta Management VIII\"), which is the general partner of Alta VIII. The individual managing directors of Alta Management VIII are Farah Champsi, Guy Nohra and Daniel Janney. The managing directors of Alta Management VIII exercise sole voting and investment control with respect to the shares held by Alta VIII. The individual managing directors of Alta Management VIII disclaim beneficial ownership of all shares held by Alta VIII, except to the extent of their pecuniary interests therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"The shares directly held by APNG I are indirectly held by Alta Partners NextGen Fund I Management, LLC (\"APNG I Management\"), which is the general partner of APNG I. The individual managing directors of APNG I Management are Robert More, Peter Hudson and Daniel Janney. The managing directors of APNG I Management exercise sole voting and investment control with respect to the shares held by APNG I. The individual managing directors of APNG I Management disclaim beneficial ownership of all shares held by APNG I, except to the extent of their pecuniary interests therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Consists of 3,557,377 shares held of record by APNG I and 7,961,823 shares held of record by Alta VIII."}],"balance_after":11519200,"source":{"system":"sec-edgar","filing":"0001209191-18-043627","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1736001/000120919118043627/doc4.xml","form_type":"4"}},{"id":3862973,"issuer":{"id":79644,"kind":"organization","name":"Allakos Inc.","symbol":"ALLK"},"owners":[{"id":110408,"kind":"organization","name":"Alta Partners VIII, L.P.","position":1,"cik":"0001399763","reported_name":"Alta Partners VIII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":110407,"kind":"organization","name":"Alta Partners Management VIII, LLC","position":2,"cik":"0001399894","reported_name":"Alta Partners Management VIII, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":144083,"kind":"organization","name":"Alta Partners NextGen Fund I Management, LLC","position":3,"cik":"0001736001","reported_name":"Alta Partners NextGen Fund I Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":144084,"kind":"organization","name":"Alta Partners NextGen Fund I, L.P.","position":4,"cik":"0001698110","reported_name":"Alta Partners NextGen Fund I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":143450,"kind":"person","name":"CHAMPSI FARAH","position":5,"cik":"0001198321","reported_name":"CHAMPSI FARAH","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135397,"kind":"person","name":"Hudson Peter A","position":6,"cik":"0001674884","reported_name":"Hudson Peter A","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":24127,"kind":"person","name":"MORE ROBERT J","position":7,"cik":"0001207792","reported_name":"MORE ROBERT J","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39204,"kind":"person","name":"NOHRA GUY P","position":8,"cik":"0001198330","reported_name":"NOHRA GUY P","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-07-23T17:01:38.000Z","date":"2018-07-23","kind":"exercise","acquired":true,"shares":11269200,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The Series A Preferred Stock automatically converted into Common Stock on a one-for-one basis immediately prior to the closing of the Issuer's initial public offering and had no expiration date."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The Series B Preferred Stock automatically converted into Common Stock on a one-for-one basis immediately prior to the closing of the Issuer's initial public offering and had no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Consists of 3,446,265 shares held of record by Alta Partners NextGen Fund I, L.P. (\"APNG I\") and 7,822,935 shares held of record by Alta Partners VIII, L.P. (\"Alta VIII\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The shares directly held by Alta VIII are indirectly held by Alta Partners Management VIII, LLC (\"Alta Management VIII\"), which is the general partner of Alta VIII. The individual managing directors of Alta Management VIII are Farah Champsi, Guy Nohra and Daniel Janney. The managing directors of Alta Management VIII exercise sole voting and investment control with respect to the shares held by Alta VIII. The individual managing directors of Alta Management VIII disclaim beneficial ownership of all shares held by Alta VIII, except to the extent of their pecuniary interests therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"The shares directly held by APNG I are indirectly held by Alta Partners NextGen Fund I Management, LLC (\"APNG I Management\"), which is the general partner of APNG I. The individual managing directors of APNG I Management are Robert More, Peter Hudson and Daniel Janney. The managing directors of APNG I Management exercise sole voting and investment control with respect to the shares held by APNG I. The individual managing directors of APNG I Management disclaim beneficial ownership of all shares held by APNG I, except to the extent of their pecuniary interests therein."}],"balance_after":11269200,"source":{"system":"sec-edgar","filing":"0001209191-18-043627","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1736001/000120919118043627/doc4.xml","form_type":"4"}}]}