{"entity":{"type":"insider","cik":"0001553335","url":"/insider/0001553335","json_url":"/insider/0001553335.json","name":"Dupont Jakob","name_source":"as-filed","also_issuer":false,"cross_url":null},"coverage_statement":{"n_transactions":34,"n_filings":29,"first":"2014-06-30","last":"2026-07-02","span_basis":"filed_date"},"name_variants":[{"name":"Dupont Jakob","source":"filing","n_filings":29,"first_seen":"2014-06-30","last_seen":"2026-07-02"}],"transactions":[{"id":5825725,"accession":"0001193125-26-294708","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001193125-26-294708","line_url":"/filing/0001193125-26-294708#line-2","is_derivative":false,"issuer_cik":"0001553335","issuer_name":"Pyxis Oncology, Inc.","issuer_ticker":"PYXS","issuer_name_source":null,"issuer_url":"/issuer/0001553335","owner_cik":"0001553335","owner_name":"Dupont Jakob","owner_display_name":"Dupont Jakob","owner_url":"/insider/0001553335","role":"Director","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":null,"security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":35000.0,"shares_display":"35,000","price_per_share":3.06,"price_display":"3.06","price_state":"stated","total_value":107100.0,"total_display":"107,100.00","total_whole":"107,100","shares_owned_after":38741.0,"shares_owned_after_display":"38,741","ownership_form":"D","is_10b5_1":null,"transaction_date":"2026-06-30","filed_date":"2026-07-02","scope":"insider"},{"id":8046135,"accession":"0001567619-23-004537","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001567619-23-004537","line_url":"/filing/0001567619-23-004537#line-1","is_derivative":false,"issuer_cik":"0001553335","issuer_name":"Atara Biotherapeutics, Inc.","issuer_ticker":"ATRA","issuer_name_source":null,"issuer_url":"/issuer/0001553335","owner_cik":"0001553335","owner_name":"Dupont Jakob","owner_display_name":"Dupont Jakob","owner_url":"/insider/0001553335","role":"Officer (EVP, Head of R&D)","role_mark":"O","role_mark_label":"Officer (EVP, Head of R&D)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP, Head of R&D","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":5074.0,"shares_display":"5,074","price_per_share":3.627,"price_display":"3.63","price_state":"stated","total_value":18403.398,"total_display":"18,403.40","total_whole":"18,403","shares_owned_after":290794.0,"shares_owned_after_display":"290,794","ownership_form":"D","is_10b5_1":null,"transaction_date":"2023-03-02","filed_date":"2023-03-06","scope":"insider"},{"id":6964377,"accession":"0001140361-22-042381","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001140361-22-042381","line_url":"/filing/0001140361-22-042381","is_derivative":false,"issuer_cik":"0001553335","issuer_name":"Atara Biotherapeutics, Inc.","issuer_ticker":"ATRA","issuer_name_source":null,"issuer_url":"/issuer/0001553335","owner_cik":"0001553335","owner_name":"Dupont Jakob","owner_display_name":"Dupont Jakob","owner_url":"/insider/0001553335","role":"Officer (EVP, Head of R&D)","role_mark":"O","role_mark_label":"Officer (EVP, Head of R&D)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP, Head of R&D","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":4342.0,"shares_display":"4,342","price_per_share":4.4902588668816215,"price_display":"4.49","price_state":"stated","total_value":19496.704,"total_display":"19,496.70","total_whole":"19,497","shares_owned_after":155664.0,"shares_owned_after_display":"155,664","ownership_form":"D","is_10b5_1":null,"transaction_date":"2022-11-16","filed_date":"2022-11-18","scope":"insider","n_lines":2},{"id":6809456,"accession":"0001140361-22-030300","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001140361-22-030300","line_url":"/filing/0001140361-22-030300#line-1","is_derivative":false,"issuer_cik":"0001553335","issuer_name":"Atara Biotherapeutics, Inc.","issuer_ticker":"ATRA","issuer_name_source":null,"issuer_url":"/issuer/0001553335","owner_cik":"0001553335","owner_name":"Dupont Jakob","owner_display_name":"Dupont Jakob","owner_url":"/insider/0001553335","role":"Officer (EVP, Head of R&D)","role_mark":"O","role_mark_label":"Officer (EVP, Head of R&D)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP, Head of R&D","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":4124.0,"shares_display":"4,124","price_per_share":5.034,"price_display":"5.03","price_state":"stated","total_value":20760.216,"total_display":"20,760.22","total_whole":"20,760","shares_owned_after":158882.0,"shares_owned_after_display":"158,882","ownership_form":"D","is_10b5_1":null,"transaction_date":"2022-08-16","filed_date":"2022-08-18","scope":"insider"},{"id":6915537,"accession":"0001140361-22-019981","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001140361-22-019981","line_url":"/filing/0001140361-22-019981#line-1","is_derivative":false,"issuer_cik":"0001553335","issuer_name":"Atara Biotherapeutics, Inc.","issuer_ticker":"ATRA","issuer_name_source":null,"issuer_url":"/issuer/0001553335","owner_cik":"0001553335","owner_name":"Dupont Jakob","owner_display_name":"Dupont Jakob","owner_url":"/insider/0001553335","role":"Officer (EVP, Head of R&D)","role_mark":"O","role_mark_label":"Officer (EVP, Head of R&D)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP, Head of R&D","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":3873.0,"shares_display":"3,873","price_per_share":5.318,"price_display":"5.32","price_state":"stated","total_value":20596.614,"total_display":"20,596.61","total_whole":"20,597","shares_owned_after":163006.0,"shares_owned_after_display":"163,006","ownership_form":"D","is_10b5_1":null,"transaction_date":"2022-05-17","filed_date":"2022-05-19","scope":"insider"},{"id":6975034,"accession":"0001140361-22-007765","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001140361-22-007765","line_url":"/filing/0001140361-22-007765#line-2","is_derivative":false,"issuer_cik":"0001553335","issuer_name":"Atara Biotherapeutics, Inc.","issuer_ticker":"ATRA","issuer_name_source":null,"issuer_url":"/issuer/0001553335","owner_cik":"0001553335","owner_name":"Dupont Jakob","owner_display_name":"Dupont Jakob","owner_url":"/insider/0001553335","role":"Officer (EVP, Head of R&D)","role_mark":"O","role_mark_label":"Officer (EVP, Head of R&D)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP, Head of R&D","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":2221.0,"shares_display":"2,221","price_per_share":9.856,"price_display":"9.86","price_state":"stated","total_value":21890.176,"total_display":"21,890.18","total_whole":"21,890","shares_owned_after":166879.0,"shares_owned_after_display":"166,879","ownership_form":"D","is_10b5_1":null,"transaction_date":"2022-03-01","filed_date":"2022-03-03","scope":"insider"},{"id":6093454,"accession":"0001567619-22-004499","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001567619-22-004499","line_url":"/filing/0001567619-22-004499#line-2","is_derivative":false,"issuer_cik":"0001553335","issuer_name":"Atara Biotherapeutics, Inc.","issuer_ticker":"ATRA","issuer_name_source":null,"issuer_url":"/issuer/0001553335","owner_cik":"0001553335","owner_name":"Dupont Jakob","owner_display_name":"Dupont Jakob","owner_url":"/insider/0001553335","role":"Officer (EVP, Head of R&D)","role_mark":"O","role_mark_label":"Officer (EVP, Head of R&D)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP, Head of R&D","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":5000.0,"shares_display":"5,000","price_per_share":16.0,"price_display":"16.00","price_state":"stated","total_value":80000.0,"total_display":"80,000.00","total_whole":"80,000","shares_owned_after":90594.0,"shares_owned_after_display":"90,594","ownership_form":"D","is_10b5_1":null,"transaction_date":"2022-02-10","filed_date":"2022-02-14","scope":"insider"},{"id":6394157,"accession":"0001567619-22-000568","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001567619-22-000568","line_url":"/filing/0001567619-22-000568#line-2","is_derivative":false,"issuer_cik":"0001553335","issuer_name":"Atara Biotherapeutics, Inc.","issuer_ticker":"ATRA","issuer_name_source":null,"issuer_url":"/issuer/0001553335","owner_cik":"0001553335","owner_name":"Dupont Jakob","owner_display_name":"Dupont Jakob","owner_url":"/insider/0001553335","role":"Officer (EVP, Head of R&D)","role_mark":"O","role_mark_label":"Officer (EVP, Head of R&D)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP, Head of R&D","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":5000.0,"shares_display":"5,000","price_per_share":16.01,"price_display":"16.01","price_state":"stated","total_value":80050.0,"total_display":"80,050.00","total_whole":"80,050","shares_owned_after":90594.0,"shares_owned_after_display":"90,594","ownership_form":"D","is_10b5_1":null,"transaction_date":"2022-01-03","filed_date":"2022-01-05","scope":"insider"},{"id":4108896,"accession":"0001567619-21-021583","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001567619-21-021583","line_url":"/filing/0001567619-21-021583#line-2","is_derivative":false,"issuer_cik":"0001553335","issuer_name":"Atara Biotherapeutics, Inc.","issuer_ticker":"ATRA","issuer_name_source":null,"issuer_url":"/issuer/0001553335","owner_cik":"0001553335","owner_name":"Dupont Jakob","owner_display_name":"Dupont Jakob","owner_url":"/insider/0001553335","role":"Officer (EVP, Head of R&D)","role_mark":"O","role_mark_label":"Officer (EVP, Head of R&D)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP, Head of R&D","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":5000.0,"shares_display":"5,000","price_per_share":17.9377,"price_display":"17.94","price_state":"stated","total_value":89688.5,"total_display":"89,688.50","total_whole":"89,689","shares_owned_after":90594.0,"shares_owned_after_display":"90,594","ownership_form":"D","is_10b5_1":null,"transaction_date":"2021-12-01","filed_date":"2021-12-03","scope":"insider"},{"id":5076441,"accession":"0001567619-21-020777","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001567619-21-020777","line_url":"/filing/0001567619-21-020777#line-1","is_derivative":false,"issuer_cik":"0001553335","issuer_name":"Atara Biotherapeutics, Inc.","issuer_ticker":"ATRA","issuer_name_source":null,"issuer_url":"/issuer/0001553335","owner_cik":"0001553335","owner_name":"Dupont Jakob","owner_display_name":"Dupont Jakob","owner_url":"/insider/0001553335","role":"Officer (EVP, Head of R&D)","role_mark":"O","role_mark_label":"Officer (EVP, Head of R&D)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP, Head of R&D","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":2199.0,"shares_display":"2,199","price_per_share":17.1169,"price_display":"17.12","price_state":"stated","total_value":37640.0631,"total_display":"37,640.06","total_whole":"37,640","shares_owned_after":90594.0,"shares_owned_after_display":"90,594","ownership_form":"D","is_10b5_1":null,"transaction_date":"2021-11-16","filed_date":"2021-11-18","scope":"insider"},{"id":5471634,"accession":"0001567619-21-019331","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001567619-21-019331","line_url":"/filing/0001567619-21-019331#line-2","is_derivative":false,"issuer_cik":"0001553335","issuer_name":"Atara Biotherapeutics, Inc.","issuer_ticker":"ATRA","issuer_name_source":null,"issuer_url":"/issuer/0001553335","owner_cik":"0001553335","owner_name":"Dupont Jakob","owner_display_name":"Dupont Jakob","owner_url":"/insider/0001553335","role":"Officer (EVP, Head of R&D)","role_mark":"O","role_mark_label":"Officer (EVP, Head of R&D)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP, Head of R&D","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":5000.0,"shares_display":"5,000","price_per_share":16.41,"price_display":"16.41","price_state":"stated","total_value":82050.0,"total_display":"82,050.00","total_whole":"82,050","shares_owned_after":92793.0,"shares_owned_after_display":"92,793","ownership_form":"D","is_10b5_1":null,"transaction_date":"2021-11-02","filed_date":"2021-11-04","scope":"insider"},{"id":4562945,"accession":"0001567619-21-016145","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001567619-21-016145","line_url":"/filing/0001567619-21-016145#line-1","is_derivative":false,"issuer_cik":"0001553335","issuer_name":"Atara Biotherapeutics, Inc.","issuer_ticker":"ATRA","issuer_name_source":null,"issuer_url":"/issuer/0001553335","owner_cik":"0001553335","owner_name":"Dupont Jakob","owner_display_name":"Dupont Jakob","owner_url":"/insider/0001553335","role":"Officer (EVP, Head of R&D)","role_mark":"O","role_mark_label":"Officer (EVP, Head of R&D)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP, Head of R&D","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":2152.0,"shares_display":"2,152","price_per_share":12.532,"price_display":"12.53","price_state":"stated","total_value":26968.864,"total_display":"26,968.86","total_whole":"26,969","shares_owned_after":92793.0,"shares_owned_after_display":"92,793","ownership_form":"D","is_10b5_1":null,"transaction_date":"2021-08-17","filed_date":"2021-08-19","scope":"insider"},{"id":4570204,"accession":"0001209191-21-034428","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001209191-21-034428","line_url":"/filing/0001209191-21-034428#line-1","is_derivative":false,"issuer_cik":"0001553335","issuer_name":"Atara Biotherapeutics, Inc.","issuer_ticker":"ATRA","issuer_name_source":null,"issuer_url":"/issuer/0001553335","owner_cik":"0001553335","owner_name":"Dupont Jakob","owner_display_name":"Dupont Jakob","owner_url":"/insider/0001553335","role":"Officer (EVP, Head of R&D)","role_mark":"O","role_mark_label":"Officer (EVP, Head of R&D)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP, Head of R&D","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":5184.0,"shares_display":"5,184","price_per_share":14.55,"price_display":"14.55","price_state":"stated","total_value":75427.2,"total_display":"75,427.20","total_whole":"75,427","shares_owned_after":94945.0,"shares_owned_after_display":"94,945","ownership_form":"D","is_10b5_1":null,"transaction_date":"2021-05-18","filed_date":"2021-05-20","scope":"insider"},{"id":8677990,"accession":"0001209191-19-062303","txn_seq":4,"anchor":"line-4","filing_url":"/filing/0001209191-19-062303","line_url":"/filing/0001209191-19-062303#line-4","is_derivative":false,"issuer_cik":"0001553335","issuer_name":"Gossamer Bio, Inc.","issuer_ticker":"GOSS","issuer_name_source":null,"issuer_url":"/issuer/0001553335","owner_cik":"0001553335","owner_name":"Dupont Jakob","owner_display_name":"Dupont Jakob","owner_url":"/insider/0001553335","role":"Officer (Chief Medical Officer)","role_mark":"O","role_mark_label":"Officer (Chief Medical Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Medical Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":40000.0,"shares_display":"40,000","price_per_share":15.0001,"price_display":"15.00","price_state":"stated","total_value":600004.0,"total_display":"600,004.00","total_whole":"600,004","shares_owned_after":0.0,"shares_owned_after_display":"0","ownership_form":"D","is_10b5_1":null,"transaction_date":"2019-12-30","filed_date":"2019-12-31","scope":"insider"},{"id":8677983,"accession":"0001209191-19-062303","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001209191-19-062303","line_url":"/filing/0001209191-19-062303#line-2","is_derivative":false,"issuer_cik":"0001553335","issuer_name":"Gossamer Bio, Inc.","issuer_ticker":"GOSS","issuer_name_source":null,"issuer_url":"/issuer/0001553335","owner_cik":"0001553335","owner_name":"Dupont Jakob","owner_display_name":"Dupont Jakob","owner_url":"/insider/0001553335","role":"Officer (Chief Medical Officer)","role_mark":"O","role_mark_label":"Officer (Chief Medical Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Medical Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":1994.0,"shares_display":"1,994","price_per_share":15.8145,"price_display":"15.81","price_state":"stated","total_value":31534.113,"total_display":"31,534.11","total_whole":"31,534","shares_owned_after":0.0,"shares_owned_after_display":"0","ownership_form":"D","is_10b5_1":null,"transaction_date":"2019-12-27","filed_date":"2019-12-31","scope":"insider"},{"id":2214897,"accession":"0001140361-16-047651","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001140361-16-047651","line_url":"/filing/0001140361-16-047651#line-2","is_derivative":false,"issuer_cik":"0001302573","issuer_name":"OncoMed Pharmaceuticals Inc","issuer_ticker":"OMED","issuer_name_source":null,"issuer_url":"/issuer/0001302573","owner_cik":"0001553335","owner_name":"Dupont Jakob","owner_display_name":"Dupont Jakob","owner_url":"/insider/0001553335","role":"Officer (SVP & Chief Medical Officer)","role_mark":"O","role_mark_label":"Officer (SVP & Chief Medical Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP & Chief Medical Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":2500.0,"shares_display":"2,500","price_per_share":20.0084,"price_display":"20.01","price_state":"stated","total_value":50021.0,"total_display":"50,021.00","total_whole":"50,021","shares_owned_after":20642.0,"shares_owned_after_display":"20,642","ownership_form":"D","is_10b5_1":null,"transaction_date":"2016-01-11","filed_date":"2016-01-12","scope":"insider"},{"id":2473184,"accession":"0001140361-16-047340","txn_seq":3,"anchor":"line-3","filing_url":"/filing/0001140361-16-047340","line_url":"/filing/0001140361-16-047340#line-3","is_derivative":false,"issuer_cik":"0001302573","issuer_name":"OncoMed Pharmaceuticals Inc","issuer_ticker":"OMED","issuer_name_source":null,"issuer_url":"/issuer/0001302573","owner_cik":"0001553335","owner_name":"Dupont Jakob","owner_display_name":"Dupont Jakob","owner_url":"/insider/0001553335","role":"Officer (SVP & Chief Medical Officer)","role_mark":"O","role_mark_label":"Officer (SVP & Chief Medical Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP & Chief Medical Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":1.0,"shares_display":"1","price_per_share":21.33,"price_display":"21.33","price_state":"stated","total_value":21.33,"total_display":"21.33","total_whole":"21","shares_owned_after":20642.0,"shares_owned_after_display":"20,642","ownership_form":"D","is_10b5_1":null,"transaction_date":"2016-01-07","filed_date":"2016-01-08","scope":"insider"},{"id":2473173,"accession":"0001140361-16-047340","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001140361-16-047340","line_url":"/filing/0001140361-16-047340","is_derivative":false,"issuer_cik":"0001302573","issuer_name":"OncoMed Pharmaceuticals Inc","issuer_ticker":"OMED","issuer_name_source":null,"issuer_url":"/issuer/0001302573","owner_cik":"0001553335","owner_name":"Dupont Jakob","owner_display_name":"Dupont Jakob","owner_url":"/insider/0001553335","role":"Officer (SVP & Chief Medical Officer)","role_mark":"O","role_mark_label":"Officer (SVP & Chief Medical Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP & Chief Medical Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":2161.0,"shares_display":"2,161","price_per_share":22.276317491901896,"price_display":"22.28","price_state":"stated","total_value":48139.1221,"total_display":"48,139.12","total_whole":"48,139","shares_owned_after":20712.0,"shares_owned_after_display":"20,712","ownership_form":"D","is_10b5_1":null,"transaction_date":"2016-01-06","filed_date":"2016-01-08","scope":"insider","n_lines":2},{"id":8449061,"accession":"0001140361-15-044437","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001140361-15-044437","line_url":"/filing/0001140361-15-044437#line-2","is_derivative":false,"issuer_cik":"0001302573","issuer_name":"OncoMed Pharmaceuticals Inc","issuer_ticker":"OMED","issuer_name_source":null,"issuer_url":"/issuer/0001302573","owner_cik":"0001553335","owner_name":"Dupont Jakob","owner_display_name":"Dupont Jakob","owner_url":"/insider/0001553335","role":"Officer (SVP & Chief Medical Officer)","role_mark":"O","role_mark_label":"Officer (SVP & Chief Medical Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP & Chief Medical Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":2500.0,"shares_display":"2,500","price_per_share":20.4925,"price_display":"20.49","price_state":"stated","total_value":51231.25,"total_display":"51,231.25","total_whole":"51,231","shares_owned_after":22804.0,"shares_owned_after_display":"22,804","ownership_form":"D","is_10b5_1":null,"transaction_date":"2015-12-10","filed_date":"2015-12-14","scope":"insider"},{"id":8884666,"accession":"0001140361-15-040926","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001140361-15-040926","line_url":"/filing/0001140361-15-040926#line-2","is_derivative":false,"issuer_cik":"0001302573","issuer_name":"OncoMed Pharmaceuticals Inc","issuer_ticker":"OMED","issuer_name_source":null,"issuer_url":"/issuer/0001302573","owner_cik":"0001553335","owner_name":"Dupont Jakob","owner_display_name":"Dupont Jakob","owner_url":"/insider/0001553335","role":"Officer (SVP & Chief Medical Officer)","role_mark":"O","role_mark_label":"Officer (SVP & Chief Medical Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP & Chief Medical Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":2500.0,"shares_display":"2,500","price_per_share":21.1692,"price_display":"21.17","price_state":"stated","total_value":52923.0,"total_display":"52,923.00","total_whole":"52,923","shares_owned_after":22804.0,"shares_owned_after_display":"22,804","ownership_form":"D","is_10b5_1":null,"transaction_date":"2015-11-10","filed_date":"2015-11-12","scope":"insider"},{"id":8326514,"accession":"0001140361-15-038713","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001140361-15-038713","line_url":"/filing/0001140361-15-038713#line-2","is_derivative":false,"issuer_cik":"0001302573","issuer_name":"OncoMed Pharmaceuticals Inc","issuer_ticker":"OMED","issuer_name_source":null,"issuer_url":"/issuer/0001302573","owner_cik":"0001553335","owner_name":"Dupont Jakob","owner_display_name":"Dupont Jakob","owner_url":"/insider/0001553335","role":"Officer (SVP & Chief Medical Officer)","role_mark":"O","role_mark_label":"Officer (SVP & Chief Medical Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP & Chief Medical Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":5000.0,"shares_display":"5,000","price_per_share":20.0,"price_display":"20.00","price_state":"stated","total_value":100000.0,"total_display":"100,000.00","total_whole":"100,000","shares_owned_after":22804.0,"shares_owned_after_display":"22,804","ownership_form":"D","is_10b5_1":null,"transaction_date":"2015-10-26","filed_date":"2015-10-27","scope":"insider"},{"id":8297070,"accession":"0001140361-15-031468","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001140361-15-031468","line_url":"/filing/0001140361-15-031468#line-2","is_derivative":false,"issuer_cik":"0001302573","issuer_name":"OncoMed Pharmaceuticals Inc","issuer_ticker":"OMED","issuer_name_source":null,"issuer_url":"/issuer/0001302573","owner_cik":"0001553335","owner_name":"Dupont Jakob","owner_display_name":"Dupont Jakob","owner_url":"/insider/0001553335","role":"Officer (SVP & Chief Medical Officer)","role_mark":"O","role_mark_label":"Officer (SVP & Chief Medical Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP & Chief Medical Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":2500.0,"shares_display":"2,500","price_per_share":22.2486,"price_display":"22.25","price_state":"stated","total_value":55621.5,"total_display":"55,621.50","total_whole":"55,622","shares_owned_after":22377.0,"shares_owned_after_display":"22,377","ownership_form":"D","is_10b5_1":null,"transaction_date":"2015-08-10","filed_date":"2015-08-12","scope":"insider"},{"id":8672340,"accession":"0001140361-15-027438","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001140361-15-027438","line_url":"/filing/0001140361-15-027438#line-2","is_derivative":false,"issuer_cik":"0001302573","issuer_name":"OncoMed Pharmaceuticals Inc","issuer_ticker":"OMED","issuer_name_source":null,"issuer_url":"/issuer/0001302573","owner_cik":"0001553335","owner_name":"Dupont Jakob","owner_display_name":"Dupont Jakob","owner_url":"/insider/0001553335","role":"Officer (SVP & Chief Medical Officer)","role_mark":"O","role_mark_label":"Officer (SVP & Chief Medical Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP & Chief Medical Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":2500.0,"shares_display":"2,500","price_per_share":20.13,"price_display":"20.13","price_state":"stated","total_value":50325.0,"total_display":"50,325.00","total_whole":"50,325","shares_owned_after":22377.0,"shares_owned_after_display":"22,377","ownership_form":"D","is_10b5_1":null,"transaction_date":"2015-07-10","filed_date":"2015-07-13","scope":"insider"},{"id":8363338,"accession":"0001140361-15-026948","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001140361-15-026948","line_url":"/filing/0001140361-15-026948#line-2","is_derivative":false,"issuer_cik":"0001302573","issuer_name":"OncoMed Pharmaceuticals Inc","issuer_ticker":"OMED","issuer_name_source":null,"issuer_url":"/issuer/0001302573","owner_cik":"0001553335","owner_name":"Dupont Jakob","owner_display_name":"Dupont Jakob","owner_url":"/insider/0001553335","role":"Officer (SVP & Chief Medical Officer)","role_mark":"O","role_mark_label":"Officer (SVP & Chief Medical Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP & Chief Medical Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":2500.0,"shares_display":"2,500","price_per_share":21.22,"price_display":"21.22","price_state":"stated","total_value":53050.0,"total_display":"53,050.00","total_whole":"53,050","shares_owned_after":22377.0,"shares_owned_after_display":"22,377","ownership_form":"D","is_10b5_1":null,"transaction_date":"2015-07-06","filed_date":"2015-07-07","scope":"insider"},{"id":8447240,"accession":"0001140361-15-015309","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001140361-15-015309","line_url":"/filing/0001140361-15-015309#line-2","is_derivative":false,"issuer_cik":"0001302573","issuer_name":"OncoMed Pharmaceuticals Inc","issuer_ticker":"OMED","issuer_name_source":null,"issuer_url":"/issuer/0001302573","owner_cik":"0001553335","owner_name":"Dupont Jakob","owner_display_name":"Dupont Jakob","owner_url":"/insider/0001553335","role":"Officer (SVP & Chief Medical Officer)","role_mark":"O","role_mark_label":"Officer (SVP & Chief Medical Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP & Chief Medical Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":1500.0,"shares_display":"1,500","price_per_share":26.51,"price_display":"26.51","price_state":"stated","total_value":39765.0,"total_display":"39,765.00","total_whole":"39,765","shares_owned_after":22377.0,"shares_owned_after_display":"22,377","ownership_form":"D","is_10b5_1":null,"transaction_date":"2015-04-10","filed_date":"2015-04-14","scope":"insider"},{"id":8606976,"accession":"0001140361-15-011604","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001140361-15-011604","line_url":"/filing/0001140361-15-011604#line-2","is_derivative":false,"issuer_cik":"0001302573","issuer_name":"OncoMed Pharmaceuticals Inc","issuer_ticker":"OMED","issuer_name_source":null,"issuer_url":"/issuer/0001302573","owner_cik":"0001553335","owner_name":"Dupont Jakob","owner_display_name":"Dupont Jakob","owner_url":"/insider/0001553335","role":"Officer (SVP & Chief Medical Officer)","role_mark":"O","role_mark_label":"Officer (SVP & Chief Medical Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP & Chief Medical Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":1500.0,"shares_display":"1,500","price_per_share":27.1691,"price_display":"27.17","price_state":"stated","total_value":40753.65,"total_display":"40,753.65","total_whole":"40,754","shares_owned_after":21620.0,"shares_owned_after_display":"21,620","ownership_form":"D","is_10b5_1":null,"transaction_date":"2015-03-10","filed_date":"2015-03-12","scope":"insider"},{"id":8790539,"accession":"0001140361-15-006061","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001140361-15-006061","line_url":"/filing/0001140361-15-006061#line-2","is_derivative":false,"issuer_cik":"0001302573","issuer_name":"OncoMed Pharmaceuticals Inc","issuer_ticker":"OMED","issuer_name_source":null,"issuer_url":"/issuer/0001302573","owner_cik":"0001553335","owner_name":"Dupont Jakob","owner_display_name":"Dupont Jakob","owner_url":"/insider/0001553335","role":"Officer (SVP & Chief Medical Officer)","role_mark":"O","role_mark_label":"Officer (SVP & Chief Medical Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP & Chief Medical Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":1500.0,"shares_display":"1,500","price_per_share":24.234,"price_display":"24.23","price_state":"stated","total_value":36351.0,"total_display":"36,351.00","total_whole":"36,351","shares_owned_after":21620.0,"shares_owned_after_display":"21,620","ownership_form":"D","is_10b5_1":null,"transaction_date":"2015-02-10","filed_date":"2015-02-12","scope":"insider"},{"id":8790513,"accession":"0001140361-15-001809","txn_seq":3,"anchor":"line-3","filing_url":"/filing/0001140361-15-001809","line_url":"/filing/0001140361-15-001809","is_derivative":false,"issuer_cik":"0001302573","issuer_name":"OncoMed Pharmaceuticals Inc","issuer_ticker":"OMED","issuer_name_source":null,"issuer_url":"/issuer/0001302573","owner_cik":"0001553335","owner_name":"Dupont Jakob","owner_display_name":"Dupont Jakob","owner_url":"/insider/0001553335","role":"Officer (SVP & Chief Medical Officer)","role_mark":"O","role_mark_label":"Officer (SVP & Chief Medical Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP & Chief Medical Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":1500.0,"shares_display":"1,500","price_per_share":25.8907,"price_display":"25.89","price_state":"stated","total_value":38836.05,"total_display":"38,836.05","total_whole":"38,836","shares_owned_after":22020.0,"shares_owned_after_display":"22,020","ownership_form":"D","is_10b5_1":null,"transaction_date":"2015-01-12","filed_date":"2015-01-14","scope":"insider","n_lines":2},{"id":8781135,"accession":"0001140361-15-000981","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001140361-15-000981","line_url":"/filing/0001140361-15-000981#line-2","is_derivative":false,"issuer_cik":"0001302573","issuer_name":"OncoMed Pharmaceuticals Inc","issuer_ticker":"OMED","issuer_name_source":null,"issuer_url":"/issuer/0001302573","owner_cik":"0001553335","owner_name":"Dupont Jakob","owner_display_name":"Dupont Jakob","owner_url":"/insider/0001553335","role":"Officer (SVP & Chief Medical Officer)","role_mark":"O","role_mark_label":"Officer (SVP & Chief Medical Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP & Chief Medical Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":7500.0,"shares_display":"7,500","price_per_share":23.0,"price_display":"23.00","price_state":"stated","total_value":172500.0,"total_display":"172,500.00","total_whole":"172,500","shares_owned_after":21620.0,"shares_owned_after_display":"21,620","ownership_form":"D","is_10b5_1":null,"transaction_date":"2015-01-05","filed_date":"2015-01-07","scope":"insider"},{"id":6198221,"accession":"0001140361-14-029450","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001140361-14-029450","line_url":"/filing/0001140361-14-029450#line-2","is_derivative":false,"issuer_cik":"0001302573","issuer_name":"OncoMed Pharmaceuticals Inc","issuer_ticker":"OMED","issuer_name_source":null,"issuer_url":"/issuer/0001302573","owner_cik":"0001553335","owner_name":"Dupont Jakob","owner_display_name":"Dupont Jakob","owner_url":"/insider/0001553335","role":"Officer (SVP & Chief Medical Officer)","role_mark":"O","role_mark_label":"Officer (SVP & Chief Medical Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP & Chief Medical Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":1500.0,"shares_display":"1,500","price_per_share":23.0,"price_display":"23.00","price_state":"stated","total_value":34500.0,"total_display":"34,500.00","total_whole":"34,500","shares_owned_after":20896.0,"shares_owned_after_display":"20,896","ownership_form":"D","is_10b5_1":null,"transaction_date":"2014-07-23","filed_date":"2014-07-25","scope":"insider"},{"id":6604828,"accession":"0001140361-14-027097","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001140361-14-027097","line_url":"/filing/0001140361-14-027097#line-2","is_derivative":false,"issuer_cik":"0001302573","issuer_name":"OncoMed Pharmaceuticals Inc","issuer_ticker":"OMED","issuer_name_source":null,"issuer_url":"/issuer/0001302573","owner_cik":"0001553335","owner_name":"Dupont Jakob","owner_display_name":"Dupont Jakob","owner_url":"/insider/0001553335","role":"Officer (SVP & Chief Medical Officer)","role_mark":"O","role_mark_label":"Officer (SVP & Chief Medical Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP & Chief Medical Officer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":1500.0,"shares_display":"1,500","price_per_share":23.0023,"price_display":"23.00","price_state":"stated","total_value":34503.45,"total_display":"34,503.45","total_whole":"34,503","shares_owned_after":20896.0,"shares_owned_after_display":"20,896","ownership_form":"D","is_10b5_1":null,"transaction_date":"2014-06-26","filed_date":"2014-06-30","scope":"insider"}],"collapsed":true,"next_cursor":null,"ledger_fault":false,"count":{"value":34,"kind":"exact"},"open_market_only":false,"composition":{"kind":"exact","rows":[{"code":"P","label":"Open-market purchase","n":0,"open_market":true},{"code":"S","label":"Open-market sale","n":34,"open_market":true},{"code":"M","label":"Option exercise","n":0,"open_market":false},{"code":"A","label":"Grant or award","n":0,"open_market":false},{"code":"F","label":"Tax withholding","n":0,"open_market":false},{"code":"D","label":"Disposition to the issuer","n":0,"open_market":false},{"code":"X","label":"In-the-money option exercise","n":0,"open_market":false}],"total":34},"affiliations":[{"type":"issuer","type_label":"ISSUER","cik":"0001782223","name":"Pyxis Oncology, Inc.","url":"/issuer/0001782223","role":"Director","n_filings":1,"first_seen":"2026-07-02","last_seen":"2026-07-02"},{"type":"issuer","type_label":"ISSUER","cik":"0001604464","name":"Atara Biotherapeutics, Inc.","url":"/issuer/0001604464","role":"Officer (EVP, Head of R&D)","n_filings":12,"first_seen":"2021-05-20","last_seen":"2023-03-06"},{"type":"issuer","type_label":"ISSUER","cik":"0001728117","name":"Gossamer Bio, Inc.","url":"/issuer/0001728117","role":"Officer (Chief Medical Officer)","n_filings":1,"first_seen":"2019-12-31","last_seen":"2019-12-31"},{"type":"issuer","type_label":"ISSUER","cik":"0001302573","name":"OncoMed Pharmaceuticals Inc","url":"/issuer/0001302573","role":"Officer (SVP & Chief Medical Officer)","n_filings":15,"first_seen":"2014-06-30","last_seen":"2016-01-12"}],"order_statement":"Newest transaction date first, id breaking the tie.","canonical_url":"https://ebomi.com/insider/0001553335","retrieved_at":"2026-08-23T06:16:21+00:00","coverage":{"filings":1506293,"transactions":4290787,"issuers":28597,"insiders":152303,"first_filed_date":"2003-06-30","last_filed_date":"2026-08-21","last_ingest":"2026-08-22T05:23:40.159918+00:00","counts_are":{"filings":"estimate","transactions":"estimate","issuers":"estimate","insiders":"estimate"},"source":"SEC EDGAR Form 4 filings, parsed by ebomi","fault":false},"license":{"underlying_records":"US SEC filings are public records of the United States government and are not subject to copyright. The transactional facts in them are not ours to license.","this_presentation":"The parsing, normalisation, curation, and presentation are ebomi's own work.","grant":"undecided","grant_note":"The open licence for ebomi's own layer is an open owner decision (SPEC-20260731T1159Z open question 3: CC BY 4.0 or CC0 with a citation request). Until it is taken, no grant is asserted here.","citation_request":"Balogh, A. Insider trading. Scientific Data 10, 237 (2023)","url":"https://ebomi.com/license"},"fair_use":{"policy":"These JSON endpoints are open and unauthenticated. Please read them at a human pace, identify your client in the User-Agent header, and use the published dataset for bulk work rather than crawling page by page.","bulk_alternative":"doi:10.1038/s41597-023-02147-6"}}