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The option vests based on the satisfaction by Issuer of certain performance criteria. The achievement of one of the performance criteria resulted in vesting of the option as to 12,250 shares."}],"balance_after":12250,"derivative":{"exercise_price":12.15,"exercise_date":"2022-01-28","expiration_date":"2030-08-12","underlying":"Common Stock","underlying_shares":12250},"source":{"system":"sec-edgar","filing":"0001209191-22-005426","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1290149/000120919122005426/doc4.xml","form_type":"4"}},{"id":2422348,"issuer":{"id":125698,"kind":"organization","name":"Sierra Oncology, Inc.","symbol":"SRRA"},"owners":[{"id":64669,"kind":"person","name":"Turner William D.","position":1,"cik":"0001819688","reported_name":"Turner William D.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Reg & Tech Ops Officer"}}],"security":"Stock Option (Right to Buy)","published_at":"2022-01-28T16:39:37.000Z","date":"2022-01-26","kind":"exercise","acquired":true,"shares":5000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"On August 4, 2021, the option vested as to 25% of the total shares granted on August 4, 2020, with the remaining shares from that grant vesting in equal monthly installments over the following 36 months, with 100% of the total shares vested on August 4, 2024, subject to the Reporting Person's provision of service to the Issuer on each vesting date."}],"balance_after":0,"derivative":{"exercise_price":12.05,"expiration_date":"2030-08-04","underlying":"Common Stock","underlying_shares":5000},"source":{"system":"sec-edgar","filing":"0001209191-22-005426","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1290149/000120919122005426/doc4.xml","form_type":"4"}},{"id":2422347,"issuer":{"id":125698,"kind":"organization","name":"Sierra Oncology, Inc.","symbol":"SRRA"},"owners":[{"id":64669,"kind":"person","name":"Turner William D.","position":1,"cik":"0001819688","reported_name":"Turner William D.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Reg & Tech Ops Officer"}}],"security":"Common Stock","published_at":"2022-01-28T16:39:37.000Z","date":"2022-01-26","kind":"sale","acquired":false,"shares":5000,"price":27.05,"value":135250.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on January 23, 2022. The Reporting Person is subject to a Lock-Up Letter Agreement that expires on April 26, 2022. The sale of shares is a permissible exemption under the terms of the Lock-Up Letter Agreement."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001209191-22-005426","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1290149/000120919122005426/doc4.xml","form_type":"4"}},{"id":2422346,"issuer":{"id":125698,"kind":"organization","name":"Sierra Oncology, Inc.","symbol":"SRRA"},"owners":[{"id":64669,"kind":"person","name":"Turner William D.","position":1,"cik":"0001819688","reported_name":"Turner William D.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Reg & Tech Ops Officer"}}],"security":"Common Stock","published_at":"2022-01-28T16:39:37.000Z","date":"2022-01-26","kind":"exercise","acquired":true,"shares":5000,"price":12.05,"value":60250.0,"ownership":{"direct":true},"balance_after":5000,"source":{"system":"sec-edgar","filing":"0001209191-22-005426","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1290149/000120919122005426/doc4.xml","form_type":"4"}},{"id":2781672,"issuer":{"id":125698,"kind":"organization","name":"Sierra Oncology, Inc.","symbol":"SRRA"},"owners":[{"id":64669,"kind":"person","name":"Turner William D.","position":1,"cik":"0001819688","reported_name":"Turner William D.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Reg & Tech Ops Officer"}}],"security":"Stock Option (Right to Buy)","published_at":"2021-03-17T21:18:38.000Z","date":"2021-03-15","kind":"grant","acquired":true,"shares":12300,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The option vests as to 25% of the total shares subject to the option on March 15, 2022, and then 2.0833% of the shares subject to the option vest monthly thereafter, with 100% of the total shares subject to the option vested on March 15, 2025, subject to Reporting Person's provision of service to the Issuer on each vesting date."}],"balance_after":12300,"derivative":{"exercise_price":16.73,"expiration_date":"2031-03-15","underlying":"Common Stock","underlying_shares":12300},"source":{"system":"sec-edgar","filing":"0001209191-21-021625","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1290149/000120919121021625/doc4.xml","form_type":"4"}},{"id":3065756,"issuer":{"id":125698,"kind":"organization","name":"Sierra Oncology, Inc.","symbol":"SRRA"},"owners":[{"id":64669,"kind":"person","name":"Turner William D.","position":1,"cik":"0001819688","reported_name":"Turner William D.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Reg & Tech Ops Officer"}}],"security":"Stock option (right to buy)","published_at":"2020-08-06T18:52:47.000Z","date":"2020-08-04","kind":"grant","acquired":true,"shares":100000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The option vests as to 25% of the total shares on August 4, 2021, and then the remaining shares vest in equal monthly installments over the following 36 months, with 100% of the total shares vested on August 4, 2024, subject to the Reporting Person's provision of service to the Issuer on each vesting date."}],"balance_after":100000,"derivative":{"exercise_price":12.05,"expiration_date":"2030-08-04","underlying":"Common Stock","underlying_shares":100000},"source":{"system":"sec-edgar","filing":"0001209191-20-045576","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1290149/000120919120045576/doc4.xml","form_type":"4"}}]}