{"transactions":[{"id":741408,"issuer":{"id":6828,"kind":"organization","name":"Atara Biotherapeutics, Inc.","symbol":"ATRA"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-06-11T20:37:50.000Z","date":"2026-06-09","kind":"grant","planned":false,"acquired":true,"shares":12000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These restricted stock units shall vest on the earlier of June 9, 2027 or the date of the next annual meeting of stockholders, subject to the Reporting Person's continuous service."}],"balance_after":34188,"source":{"system":"sec-edgar","filing":"0000905148-26-002921","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1214939/000090514826002921/form4.xml","form_type":"4"}},{"id":770388,"issuer":{"id":6104,"kind":"organization","name":"MACROGENICS INC","symbol":"MGNX"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (right to buy)","published_at":"2026-05-20T20:14:02.000Z","date":"2026-05-19","kind":"grant","planned":false,"acquired":true,"shares":22000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The option will vest and become exercisable in monthly, cumulative 1/12th increments (rounded upwards for whole shares) beginning one month from the date of grant."}],"balance_after":22000,"derivative":{"exercise_price":4.52,"expiration_date":"2036-05-19","underlying":"Common Stock","underlying_shares":22000},"source":{"system":"sec-edgar","filing":"0001214939-26-000002","document":"wk-form4_1779308039.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1125345/000121493926000002/wk-form4_1779308039.xml","form_type":"4"}},{"id":770387,"issuer":{"id":6104,"kind":"organization","name":"MACROGENICS INC","symbol":"MGNX"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Unit","published_at":"2026-05-20T20:14:02.000Z","date":"2026-05-19","kind":"grant","planned":false,"acquired":true,"shares":3750,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (RSU) represents a contingent right to receive one share of the Issuer's common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The RSUs will vest one year after the date of grant, or the day prior to the next annual meeting, if earlier"},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"The RSUs will vest one year after the date of grant, or the day prior to the next annual meeting, if earlier"}],"balance_after":3750,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":3750},"source":{"system":"sec-edgar","filing":"0001214939-26-000002","document":"wk-form4_1779308039.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1125345/000121493926000002/wk-form4_1779308039.xml","form_type":"4"}},{"id":770386,"issuer":{"id":6104,"kind":"organization","name":"MACROGENICS INC","symbol":"MGNX"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Unit","published_at":"2026-05-20T20:14:02.000Z","date":"2026-05-18","kind":"exercise","planned":false,"acquired":false,"shares":3750,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (RSU) represents a contingent right to receive one share of the Issuer's common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs vested on May 18, 2026, which was one day prior to the Issuer's 2026 Annual Meeting of Stockholders held on May 19, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs vested on May 18, 2026, which was one day prior to the Issuer's 2026 Annual Meeting of Stockholders held on May 19, 2026."}],"balance_after":0,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":3750},"source":{"system":"sec-edgar","filing":"0001214939-26-000002","document":"wk-form4_1779308039.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1125345/000121493926000002/wk-form4_1779308039.xml","form_type":"4"}},{"id":770385,"issuer":{"id":6104,"kind":"organization","name":"MACROGENICS INC","symbol":"MGNX"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-05-20T20:14:02.000Z","date":"2026-05-18","kind":"exercise","planned":false,"acquired":true,"shares":3750,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each restricted stock unit (RSU) represents a contingent right to receive one share of the Issuer's common stock."}],"balance_after":114750,"source":{"system":"sec-edgar","filing":"0001214939-26-000002","document":"wk-form4_1779308039.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1125345/000121493926000002/wk-form4_1779308039.xml","form_type":"4"}},{"id":1059514,"issuer":{"id":6104,"kind":"organization","name":"MACROGENICS INC","symbol":"MGNX"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-08-21T20:19:48.000Z","date":"2025-08-20","kind":"purchase","planned":false,"acquired":true,"shares":49500,"price":1.49,"value":73755.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $1.46 to $1.50. The reporting person undertakes to provide to MacroGenics, Inc., any security holder of MacroGenics, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range."}],"balance_after":111000,"source":{"system":"sec-edgar","filing":"0001214939-25-000004","document":"wk-form4_1755807584.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1125345/000121493925000004/wk-form4_1755807584.xml","form_type":"4"}},{"id":1059513,"issuer":{"id":6104,"kind":"organization","name":"MACROGENICS INC","symbol":"MGNX"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-08-21T20:19:48.000Z","date":"2025-08-19","kind":"purchase","planned":false,"acquired":true,"shares":50500,"price":1.52,"value":76760.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"This transaction was executed in multiple trades at prices ranging from $1.48 to $1.59. The reporting person undertakes to provide to MacroGenics, Inc., any security holder of MacroGenics, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range."}],"balance_after":61500,"source":{"system":"sec-edgar","filing":"0001214939-25-000004","document":"wk-form4_1755807584.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1125345/000121493925000004/wk-form4_1755807584.xml","form_type":"4"}},{"id":1113050,"issuer":{"id":6828,"kind":"organization","name":"Atara Biotherapeutics, Inc.","symbol":"ATRA"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true}}],"security":"Common Stock","published_at":"2025-06-13T00:36:38.000Z","date":"2025-06-10","kind":"grant","planned":false,"acquired":true,"shares":7828,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These restricted stock units shall vest on the earlier of June 10, 2026 or the date of the next annual meeting of stockholders, subject to the Reporting Person's continuous service."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"This amount reflects the 1:25 reverse stock split effected by the Issuer on June 20, 2024."}],"balance_after":22188,"source":{"system":"sec-edgar","filing":"0000905148-25-002137","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1214939/000090514825002137/form4.xml","form_type":"4"}},{"id":1137745,"issuer":{"id":6104,"kind":"organization","name":"MACROGENICS INC","symbol":"MGNX"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (right to buy)","published_at":"2025-05-22T20:02:48.000Z","date":"2025-05-21","kind":"grant","planned":false,"acquired":true,"shares":22000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The option will vest and become exercisable in monthly, cumulative 1/12th increments (rounded upwards for whole shares) beginning one month from the date of grant."}],"balance_after":22000,"derivative":{"exercise_price":1.49,"expiration_date":"2035-05-21","underlying":"Common Stock","underlying_shares":22000},"source":{"system":"sec-edgar","filing":"0001125345-25-000082","document":"wk-form4_1747944160.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1125345/000112534525000082/wk-form4_1747944160.xml","form_type":"4"}},{"id":1137744,"issuer":{"id":6104,"kind":"organization","name":"MACROGENICS INC","symbol":"MGNX"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Unit","published_at":"2025-05-22T20:02:48.000Z","date":"2025-05-21","kind":"grant","planned":false,"acquired":true,"shares":3750,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (RSU) represents a contingent right to receive one share of the Issuer's common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The RSUs will vest one year after the date of grant, or the day prior to the next annual meeting, if earlier"},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"The RSUs will vest one year after the date of grant, or the day prior to the next annual meeting, if earlier"}],"balance_after":3750,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":3750},"source":{"system":"sec-edgar","filing":"0001125345-25-000082","document":"wk-form4_1747944160.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1125345/000112534525000082/wk-form4_1747944160.xml","form_type":"4"}},{"id":1137743,"issuer":{"id":6104,"kind":"organization","name":"MACROGENICS INC","symbol":"MGNX"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Unit","published_at":"2025-05-22T20:02:48.000Z","date":"2025-05-20","kind":"exercise","planned":false,"acquired":false,"shares":6500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (RSU) represents a contingent right to receive one share of the Issuer's common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs vested on May 20, 2025, which was one day prior to the Issuer's 2025 Annual Meeting of Stockholders held on May 21, 2025."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs vested on May 20, 2025, which was one day prior to the Issuer's 2025 Annual Meeting of Stockholders held on May 21, 2025."}],"balance_after":0,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":6500},"source":{"system":"sec-edgar","filing":"0001125345-25-000082","document":"wk-form4_1747944160.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1125345/000112534525000082/wk-form4_1747944160.xml","form_type":"4"}},{"id":1137742,"issuer":{"id":6104,"kind":"organization","name":"MACROGENICS INC","symbol":"MGNX"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-05-22T20:02:48.000Z","date":"2025-05-20","kind":"exercise","planned":false,"acquired":true,"shares":6500,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each restricted stock unit (RSU) represents a contingent right to receive one share of the Issuer's common stock."}],"balance_after":11000,"source":{"system":"sec-edgar","filing":"0001125345-25-000082","document":"wk-form4_1747944160.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1125345/000112534525000082/wk-form4_1747944160.xml","form_type":"4"}},{"id":1504081,"issuer":{"id":6104,"kind":"organization","name":"MACROGENICS INC","symbol":"MGNX"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (right to buy)","published_at":"2024-05-23T21:16:44.000Z","date":"2024-05-21","kind":"grant","planned":false,"acquired":true,"shares":16500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The option will vest and become exercisable in monthly, cumulative 1/12th increments (rounded upwards for whole shares) beginning one month from the date of grant."}],"balance_after":16500,"derivative":{"exercise_price":4.26,"expiration_date":"2034-05-21","underlying":"Common Stock","underlying_shares":16500},"source":{"system":"sec-edgar","filing":"0001125345-24-000128","document":"wk-form4_1716498992.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1125345/000112534524000128/wk-form4_1716498992.xml","form_type":"4"}},{"id":1504080,"issuer":{"id":6104,"kind":"organization","name":"MACROGENICS INC","symbol":"MGNX"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Unit","published_at":"2024-05-23T21:16:44.000Z","date":"2024-05-21","kind":"grant","planned":false,"acquired":true,"shares":6500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (RSU) represents a contingent right to receive one share of the Issuer's common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest one year after the date of grant, or the day prior to the next annual meeting, if earlier"},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest one year after the date of grant, or the day prior to the next annual meeting, if earlier"}],"balance_after":6500,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":6500},"source":{"system":"sec-edgar","filing":"0001125345-24-000128","document":"wk-form4_1716498992.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1125345/000112534524000128/wk-form4_1716498992.xml","form_type":"4"}},{"id":1505903,"issuer":{"id":6104,"kind":"organization","name":"MACROGENICS INC","symbol":"MGNX"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Unit","published_at":"2024-05-22T20:34:25.000Z","date":"2024-05-20","kind":"exercise","planned":false,"acquired":false,"shares":4500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The restricted stock unit (RSU) grant was approved by the Board of Directors on May 31, 2023. Each RSU represents a contingent right to receive one share of the Issuer Common Stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs vested on May 20, 2024, which was one day prior to the Issuer's 2024 Annual Meeting of Stockholders held on May 21, 2024."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs vested on May 20, 2024, which was one day prior to the Issuer's 2024 Annual Meeting of Stockholders held on May 21, 2024."}],"balance_after":0,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":4500},"source":{"system":"sec-edgar","filing":"0001125345-24-000108","document":"wk-form4_1716410055.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1125345/000112534524000108/wk-form4_1716410055.xml","form_type":"4"}},{"id":1505902,"issuer":{"id":6104,"kind":"organization","name":"MACROGENICS INC","symbol":"MGNX"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-05-22T20:34:25.000Z","date":"2024-05-20","kind":"exercise","planned":false,"acquired":true,"shares":4500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The restricted stock unit (RSU) grant was approved by the Board of Directors on May 31, 2023. Each RSU represents a contingent right to receive one share of the Issuer Common Stock."}],"balance_after":4500,"source":{"system":"sec-edgar","filing":"0001125345-24-000108","document":"wk-form4_1716410055.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1125345/000112534524000108/wk-form4_1716410055.xml","form_type":"4"}},{"id":1552994,"issuer":{"id":6828,"kind":"organization","name":"Atara Biotherapeutics, Inc.","symbol":"ATRA"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true}}],"security":"Common Stock","published_at":"2024-04-02T22:12:47.000Z","date":"2024-03-31","kind":"grant","planned":false,"acquired":true,"shares":150000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These restricted stock units shall vest on the date of the Issuer's annual meeting of stockholders for the calendar year 2025, subject to the Reporting Person's continuous service."}],"balance_after":359000,"source":{"system":"sec-edgar","filing":"0000905148-24-001059","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1214939/000090514824001059/form4.xml","form_type":"4"}},{"id":1742061,"issuer":{"id":6828,"kind":"organization","name":"Atara Biotherapeutics, Inc.","symbol":"ATRA"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true}}],"security":"Common Stock","published_at":"2023-11-14T23:29:04.000Z","date":"2023-11-10","kind":"purchase","planned":false,"acquired":true,"shares":100000,"price":0.2533,"value":25330.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Represents the weighted average purchase price. The shares were purchased in multiple transactions at prices ranging from $0.2489 to $0.265. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this Form 4."}],"balance_after":209000,"source":{"system":"sec-edgar","filing":"0000905148-23-001450","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1214939/000090514823001450/form4.xml","form_type":"4"}},{"id":1869301,"issuer":{"id":6828,"kind":"organization","name":"Atara Biotherapeutics, Inc.","symbol":"ATRA"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true}}],"security":"Non-Qualified Stock Option (Right to Buy)","published_at":"2023-06-02T23:08:58.000Z","date":"2023-05-31","kind":"grant","planned":false,"acquired":true,"shares":79500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The option shall vest on the earlier of May 31, 2024 or the date of the next annual meeting of stockholders, subject to the Reporting Person's continuous service."}],"balance_after":79500,"derivative":{"exercise_price":1.53,"expiration_date":"2033-05-30","underlying":"Common Stock","underlying_shares":79500},"source":{"system":"sec-edgar","filing":"0001140361-23-028149","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1214939/000114036123028149/form4.xml","form_type":"4"}},{"id":1869300,"issuer":{"id":6828,"kind":"organization","name":"Atara Biotherapeutics, Inc.","symbol":"ATRA"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true}}],"security":"Common Stock","published_at":"2023-06-02T23:08:58.000Z","date":"2023-05-31","kind":"grant","planned":false,"acquired":true,"shares":57000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These restricted stock units shall vest on the earlier of May 31, 2024 or the date of the next annual meeting of stockholders, subject to the Reporting Person's continuous service."}],"balance_after":109000,"source":{"system":"sec-edgar","filing":"0001140361-23-028149","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1214939/000114036123028149/form4.xml","form_type":"4"}},{"id":1870555,"issuer":{"id":6104,"kind":"organization","name":"MACROGENICS INC","symbol":"MGNX"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Unit","published_at":"2023-06-02T20:53:30.000Z","date":"2023-05-31","kind":"grant","planned":false,"acquired":true,"shares":4500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each restricted stock unit (RSU) represents a contingent right to receive one share of the Issuer?s Common Stock. The RSU grant was approved by the Issuer?s Board of Directors on May 31, 2023 and will be effective as of the date the Issuer has an effective Registration Statement on Form S-8 registering the shares available for issuance under the 2023 Equity Incentive Plan."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The RSUs will vest one year after the date of grant, or the day prior to the next annual meeting, if earlier"},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"The RSUs will vest one year after the date of grant, or the day prior to the next annual meeting, if earlier"}],"balance_after":4500,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":4500},"source":{"system":"sec-edgar","filing":"0001125345-23-000095","document":"wk-form4_1685739198.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1125345/000112534523000095/wk-form4_1685739198.xml","form_type":"4"}},{"id":1870554,"issuer":{"id":6104,"kind":"organization","name":"MACROGENICS INC","symbol":"MGNX"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (right to buy)","published_at":"2023-06-02T20:53:30.000Z","date":"2023-05-31","kind":"grant","planned":false,"acquired":true,"shares":19000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The option will vest and become exercisable in monthly, cumulative 1/12th increments (rounded upwards for whole shares) beginning one month from the date of grant."}],"balance_after":19000,"derivative":{"exercise_price":4.67,"expiration_date":"2033-05-31","underlying":"Common Stock","underlying_shares":19000},"source":{"system":"sec-edgar","filing":"0001125345-23-000095","document":"wk-form4_1685739198.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1125345/000112534523000095/wk-form4_1685739198.xml","form_type":"4"}},{"id":2220978,"issuer":{"id":6828,"kind":"organization","name":"Atara Biotherapeutics, Inc.","symbol":"ATRA"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true}}],"security":"Non-Qualified Stock Option (Right to Buy)","published_at":"2022-06-27T20:48:31.000Z","date":"2022-06-23","kind":"grant","acquired":true,"shares":31500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The option shall vest on the earlier of June 23, 2023 or the date of the next annual meeting of stockholders, subject to the Reporting Person's continuous service."}],"balance_after":31500,"derivative":{"exercise_price":7.35,"expiration_date":"2032-06-22","underlying":"Common Stock","underlying_shares":31500},"source":{"system":"sec-edgar","filing":"0001140361-22-024165","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1214939/000114036122024165/form4.xml","form_type":"4"}},{"id":2220977,"issuer":{"id":6828,"kind":"organization","name":"Atara Biotherapeutics, Inc.","symbol":"ATRA"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true}}],"security":"Common Stock","published_at":"2022-06-27T20:48:31.000Z","date":"2022-06-23","kind":"grant","acquired":true,"shares":20500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These restricted stock units shall vest on the earlier of June 23, 2023 or the date of the next annual meeting of stockholders, subject to the Reporting Person's continuous service."}],"balance_after":52000,"source":{"system":"sec-edgar","filing":"0001140361-22-024165","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1214939/000114036122024165/form4.xml","form_type":"4"}},{"id":2258678,"issuer":{"id":6104,"kind":"organization","name":"MACROGENICS INC","symbol":"MGNX"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (right to buy)","published_at":"2022-05-24T20:29:55.000Z","date":"2022-05-23","kind":"grant","acquired":true,"shares":36000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The option will vest and become exercisable in monthly, cumulative 1/36th increments (rounded upwards for whole shares) beginning one month from the date of grant."}],"balance_after":36000,"derivative":{"exercise_price":3.96,"expiration_date":"2032-05-23","underlying":"Common Stock","underlying_shares":36000},"source":{"system":"sec-edgar","filing":"0001125345-22-000073","document":"wf-form4_165342417498958.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1125345/000112534522000073/wf-form4_165342417498958.xml","form_type":"4"}},{"id":2675319,"issuer":{"id":6828,"kind":"organization","name":"Atara Biotherapeutics, Inc.","symbol":"ATRA"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true}}],"security":"Non-Qualified Stock Option (Right to Buy)","published_at":"2021-06-09T23:14:44.000Z","date":"2021-06-08","kind":"grant","acquired":true,"shares":17500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The option shall vest on the earlier of June 8, 2022 or the date of the next annual meeting of stockholders, subject to the Reporting Person's continuous service."}],"balance_after":17500,"derivative":{"exercise_price":13.8,"expiration_date":"2031-06-07","underlying":"Common Stock","underlying_shares":17500},"source":{"system":"sec-edgar","filing":"0001140361-21-020444","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1214939/000114036121020444/form4.xml","form_type":"4"}},{"id":2675318,"issuer":{"id":6828,"kind":"organization","name":"Atara Biotherapeutics, Inc.","symbol":"ATRA"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true}}],"security":"Common Stock","published_at":"2021-06-09T23:14:44.000Z","date":"2021-06-08","kind":"grant","acquired":true,"shares":11000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These restricted stock units shall vest on the earlier of June 8, 2022 or the date of the next annual meeting of stockholders, subject to the Reporting Person's continuous service."}],"balance_after":31500,"source":{"system":"sec-edgar","filing":"0001140361-21-020444","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1214939/000114036121020444/form4.xml","form_type":"4"}},{"id":3106670,"issuer":{"id":6828,"kind":"organization","name":"Atara Biotherapeutics, Inc.","symbol":"ATRA"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Non-Qualified Stock Option (Right to Buy)","published_at":"2020-06-17T21:46:56.000Z","date":"2020-06-16","kind":"grant","acquired":true,"shares":24500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The option shall vest on the earlier of June 16, 2021 or the date of the next annual meeting of stockholders, subject to the Reporting Person's continuous service."}],"balance_after":24500,"derivative":{"exercise_price":10.54,"expiration_date":"2030-06-15","underlying":"Common Stock","underlying_shares":24500},"source":{"system":"sec-edgar","filing":"0001209191-20-037368","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1214939/000120919120037368/doc4.xml","form_type":"4"}},{"id":3106669,"issuer":{"id":6828,"kind":"organization","name":"Atara Biotherapeutics, Inc.","symbol":"ATRA"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-06-17T21:46:56.000Z","date":"2020-06-16","kind":"grant","acquired":true,"shares":8000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These restricted stock units shall vest on the earlier of June 16, 2021 or the date of the next annual meeting of stockholders, subject to the Reporting Person's continuous service."}],"balance_after":20500,"source":{"system":"sec-edgar","filing":"0001209191-20-037368","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1214939/000120919120037368/doc4.xml","form_type":"4"}},{"id":3229620,"issuer":{"id":145305,"kind":"organization","name":"AMAG PHARMACEUTICALS, INC.","symbol":"AMAG"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2020-03-04T17:50:03.000Z","date":"2020-03-02","kind":"tax_withholding","acquired":false,"shares":4451,"price":7.75,"value":34495.25,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares withheld to satisfy the reporting person's tax obligations in connection with the vesting of 15,165 restricted stock units (\"RSUs\") on March 2, 2020."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Reporting person's total beneficial ownership has been adjusted to reflect that no shares were awarded pursuant to the performance-based RSU award granted on February 23, 2017.  The reporting person had previously reported beneficial ownership of 55,000 shares pursuant to the RSU award, which represented the target number of shares that could have been delivered based on the achievement of certain relative total stockholder return targets over a three year performance period, which were not met, and which target share amount was previously reported on a Form 4 filed on February 27, 2017."}],"balance_after":424612,"source":{"system":"sec-edgar","filing":"0001104659-20-029292","document":"a4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/792977/000110465920029292/a4.xml","form_type":"4"}},{"id":3250887,"issuer":{"id":145305,"kind":"organization","name":"AMAG PHARMACEUTICALS, INC.","symbol":"AMAG"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2020-02-25T16:50:16.000Z","date":"2020-02-25","kind":"tax_withholding","acquired":false,"shares":3033,"price":8.84,"value":26811.72,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Represents shares withheld to satisfy the reporting person's tax obligations in connection with the vesting of 10,333 restricted stock units on February 25, 2020."}],"balance_after":484063,"source":{"system":"sec-edgar","filing":"0000792977-20-000021","document":"wf-form4_158266739872552.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/792977/000079297720000021/wf-form4_158266739872552.xml","form_type":"4"}},{"id":3250886,"issuer":{"id":145305,"kind":"organization","name":"AMAG PHARMACEUTICALS, INC.","symbol":"AMAG"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2020-02-25T16:50:16.000Z","date":"2020-02-23","kind":"tax_withholding","acquired":false,"shares":2960,"price":9.5,"value":28120.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares withheld to satisfy the reporting person's tax obligations in connection with the vesting of 10,002 restricted stock units on February 23, 2020."}],"balance_after":487096,"source":{"system":"sec-edgar","filing":"0000792977-20-000021","document":"wf-form4_158266739872552.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/792977/000079297720000021/wf-form4_158266739872552.xml","form_type":"4"}},{"id":3474507,"issuer":{"id":6828,"kind":"organization","name":"Atara Biotherapeutics, Inc.","symbol":"ATRA"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Non-Qualified Stock Option (Right to Buy)","published_at":"2019-07-01T20:59:23.000Z","date":"2019-06-27","kind":"grant","acquired":true,"shares":13000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The option shall vest on the earlier of June 27, 2020 or the date of the next annual meeting of stockholders, subject to the Reporting Person's continuous service."}],"balance_after":13000,"derivative":{"exercise_price":20.25,"expiration_date":"2029-06-26","underlying":"Common Stock","underlying_shares":13000},"source":{"system":"sec-edgar","filing":"0001209191-19-039763","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1214939/000120919119039763/doc4.xml","form_type":"4"}},{"id":3474506,"issuer":{"id":6828,"kind":"organization","name":"Atara Biotherapeutics, Inc.","symbol":"ATRA"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2019-07-01T20:59:23.000Z","date":"2019-06-27","kind":"grant","acquired":true,"shares":4000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These restricted stock units shall vest on the earlier of June 27, 2020 or the date of the next annual meeting of stockholders, subject to the Reporting Person's continuous service."}],"balance_after":12500,"source":{"system":"sec-edgar","filing":"0001209191-19-039763","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1214939/000120919119039763/doc4.xml","form_type":"4"}},{"id":3534258,"issuer":{"id":145305,"kind":"organization","name":"AMAG PHARMACEUTICALS, INC.","symbol":"AMAG"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2019-05-09T16:16:24.000Z","date":"2019-05-09","kind":"purchase","acquired":true,"shares":10000,"price":10.7,"value":107000.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares purchased on this date were purchased in multiple transactions. The actual purchase prices range from $10.59 to $10.93, inclusive. Upon request by the Securities and Exchange Commission, the issuer, or any security holder of the issuer, the reporting person will provide full information regarding the number of shares purchased at each price."}],"balance_after":490056,"source":{"system":"sec-edgar","filing":"0000792977-19-000088","document":"wf-form4_155743296909414.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/792977/000079297719000088/wf-form4_155743296909414.xml","form_type":"4"}},{"id":3616344,"issuer":{"id":145305,"kind":"organization","name":"AMAG PHARMACEUTICALS, INC.","symbol":"AMAG"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2019-03-05T18:10:25.000Z","date":"2019-03-02","kind":"tax_withholding","acquired":false,"shares":4467,"price":14.76,"value":65932.92,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Represents shares withheld to satisfy the reporting person's tax obligations in connection with the vesting of 15,165 restricted stock units on March 2, 2019."}],"balance_after":480056,"source":{"system":"sec-edgar","filing":"0000792977-19-000048","document":"wf-form4_155182741138125.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/792977/000079297719000048/wf-form4_155182741138125.xml","form_type":"4"}},{"id":3616343,"issuer":{"id":145305,"kind":"organization","name":"AMAG PHARMACEUTICALS, INC.","symbol":"AMAG"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2019-03-05T18:10:25.000Z","date":"2019-03-01","kind":"tax_withholding","acquired":false,"shares":3535,"price":14.76,"value":52176.6,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares withheld to satisfy the reporting person's tax obligations in connection with the vesting of 12,003 restricted stock units on March 1, 2019."}],"balance_after":484523,"source":{"system":"sec-edgar","filing":"0000792977-19-000048","document":"wf-form4_155182741138125.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/792977/000079297719000048/wf-form4_155182741138125.xml","form_type":"4"}},{"id":3630290,"issuer":{"id":145305,"kind":"organization","name":"AMAG PHARMACEUTICALS, INC.","symbol":"AMAG"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Stock Option (Right to Buy)","published_at":"2019-02-27T18:28:53.000Z","date":"2019-02-25","kind":"grant","acquired":true,"shares":70000,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Not applicable."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"Grant of stock option pursuant to the Plan. This option will vest and become exercisable over four years after the grant date as follows: (i) 25% on the first anniversary of the grant date and (ii) the balance vesting in equal quarterly installments over the next three years thereafter."}],"balance_after":70000,"derivative":{"exercise_price":15.51,"expiration_date":"2029-02-25","underlying":"Common Stock","underlying_shares":70000},"source":{"system":"sec-edgar","filing":"0000792977-19-000030","document":"wf-form4_155131011892355.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/792977/000079297719000030/wf-form4_155131011892355.xml","form_type":"4"}},{"id":3630289,"issuer":{"id":145305,"kind":"organization","name":"AMAG PHARMACEUTICALS, INC.","symbol":"AMAG"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2019-02-27T18:28:53.000Z","date":"2019-02-25","kind":"grant","acquired":true,"shares":132000,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Common Stock of AMAG Pharmaceuticals, Inc. (the \"Issuer\")."},{"field":"shares","element":"transactionShares","label":"F4","text":"These shares of Common Stock are issuable pursuant to a performance-based RSU grant under a long-term incentive program under the Plan and will be earned, if at all, based on achievement of certain relative total stockholder return targets over the three year performance period ending February 25, 2022 subject to continuation of a business relationship with the grantee through the conclusion of the performance period. The number above represents the target number of shares that may be delivered pursuant to the award (\"Target Award\"); however, the amount that vests could range from zero to 150% of the Target Award."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Not applicable."}],"balance_after":488058,"source":{"system":"sec-edgar","filing":"0000792977-19-000030","document":"wf-form4_155131011892355.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/792977/000079297719000030/wf-form4_155131011892355.xml","form_type":"4"}},{"id":3630288,"issuer":{"id":145305,"kind":"organization","name":"AMAG PHARMACEUTICALS, INC.","symbol":"AMAG"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2019-02-27T18:28:53.000Z","date":"2019-02-25","kind":"grant","acquired":true,"shares":31000,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Common Stock of AMAG Pharmaceuticals, Inc. (the \"Issuer\")."},{"field":"shares","element":"transactionShares","label":"F2","text":"These shares of Common Stock are issuable pursuant to a grant of RSUs pursuant to the Issuer's Fourth Amended & Restated 2007 Equity Incentive Plan, as amended (the \"Plan\") that will vest in three equal annual installments with the first installment vesting on February 25, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Not applicable."}],"balance_after":356058,"source":{"system":"sec-edgar","filing":"0000792977-19-000030","document":"wf-form4_155131011892355.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/792977/000079297719000030/wf-form4_155131011892355.xml","form_type":"4"}},{"id":3634185,"issuer":{"id":145305,"kind":"organization","name":"AMAG PHARMACEUTICALS, INC.","symbol":"AMAG"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2019-02-26T17:49:32.000Z","date":"2019-02-23","kind":"tax_withholding","acquired":false,"shares":2957,"price":15.51,"value":45863.07,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares withheld to satisfy the reporting person's tax obligations in connection with the vesting of 9,999 restricted stock units on February 23, 2019."}],"balance_after":325058,"source":{"system":"sec-edgar","filing":"0000792977-19-000025","document":"wf-form4_155122135867402.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/792977/000079297719000025/wf-form4_155122135867402.xml","form_type":"4"}},{"id":3850239,"issuer":{"id":145305,"kind":"organization","name":"AMAG PHARMACEUTICALS, INC.","symbol":"AMAG"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2018-08-08T17:17:33.000Z","date":"2018-08-07","kind":"sale","acquired":false,"shares":5000,"price":25,"value":125000.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transaction on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 1, 2017."}],"balance_after":328015,"source":{"system":"sec-edgar","filing":"0000792977-18-000055","document":"wf-form4_153376303702341.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/792977/000079297718000055/wf-form4_153376303702341.xml","form_type":"4"}},{"id":3890438,"issuer":{"id":6828,"kind":"organization","name":"Atara Biotherapeutics, Inc.","symbol":"ATRA"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Non-Qualified Stock Option (Right to Buy)","published_at":"2018-06-19T01:15:31.000Z","date":"2018-06-14","kind":"grant","acquired":true,"shares":5000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The option shall vest on June 14, 2019, subject to the Reporting Person's continuous service."}],"balance_after":5000,"derivative":{"exercise_price":45.65,"expiration_date":"2025-06-13","underlying":"Common Stock","underlying_shares":5000},"source":{"system":"sec-edgar","filing":"0001209191-18-038443","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1214939/000120919118038443/doc4.xml","form_type":"4"}},{"id":3890437,"issuer":{"id":6828,"kind":"organization","name":"Atara Biotherapeutics, Inc.","symbol":"ATRA"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2018-06-19T01:15:31.000Z","date":"2018-06-14","kind":"grant","acquired":true,"shares":1500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These restricted stock units shall vest on June 14, 2019, subject to the Reporting Person's continuous service."}],"balance_after":8500,"source":{"system":"sec-edgar","filing":"0001209191-18-038443","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1214939/000120919118038443/doc4.xml","form_type":"4"}},{"id":3906963,"issuer":{"id":145305,"kind":"organization","name":"AMAG PHARMACEUTICALS, INC.","symbol":"AMAG"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2018-06-05T07:21:13.000Z","date":"2018-06-04","kind":"sale","acquired":false,"shares":20000,"price":25,"value":500000.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transaction on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 1, 2017."}],"balance_after":333015,"source":{"system":"sec-edgar","filing":"0000792977-18-000025","document":"wf-form4_152819765533895.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/792977/000079297718000025/wf-form4_152819765533895.xml","form_type":"4"}},{"id":4012810,"issuer":{"id":145305,"kind":"organization","name":"AMAG PHARMACEUTICALS, INC.","symbol":"AMAG"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Stock Option (Right to Buy)","published_at":"2018-03-06T19:24:11.000Z","date":"2018-03-02","kind":"grant","acquired":true,"shares":100000,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Not applicable."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"Grant of stock option pursuant to the Plan. This option will vest and become exercisable over four years after the grant date as follows: (i) 25% on the first anniversary of the grant date and (ii) the balance vesting in equal quarterly installments over the next three years thereafter."}],"balance_after":100000,"derivative":{"exercise_price":21,"expiration_date":"2028-03-02","underlying":"Common Stock","underlying_shares":100000},"source":{"system":"sec-edgar","filing":"0001179110-18-003696","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/792977/000117911018003696/edgar.xml","form_type":"4"}},{"id":4012809,"issuer":{"id":145305,"kind":"organization","name":"AMAG PHARMACEUTICALS, INC.","symbol":"AMAG"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2018-03-06T19:24:11.000Z","date":"2018-03-02","kind":"tax_withholding","acquired":false,"shares":10546,"price":21,"value":221466.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F5","text":"Represents shares withheld to satisfy the reporting person's tax obligations in connection with the vesting of 9,999 RSUs on February 23, 2018, 10,002 RSUs on February 26, 2018, 3,900 RSUs on February 27, 2018, and 11,999 RSUs on March 1, 2018. Due to the black-out policies implemented by the Issuer, the shares of the Issuer's Common Stock underlying such vested RSUs were not delivered to the reporting person until March 2, 2018, at which time an aggregate of 10,546 shares were withheld to satisfy the reporting person's applicable tax obligations."}],"balance_after":353015,"source":{"system":"sec-edgar","filing":"0001179110-18-003696","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/792977/000117911018003696/edgar.xml","form_type":"4"}},{"id":4012808,"issuer":{"id":145305,"kind":"organization","name":"AMAG PHARMACEUTICALS, INC.","symbol":"AMAG"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2018-03-06T19:24:11.000Z","date":"2018-03-02","kind":"grant","acquired":true,"shares":45500,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Common Stock of AMAG Pharmaceuticals, Inc. (the \"Issuer\")."},{"field":"shares","element":"transactionShares","label":"F4","text":"These shares of Common Stock are issuable pursuant to a performance-based RSU grant under a long-term incentive program under the Plan and will be earned, if at all, based on achievement of certain relative total stockholder return targets over the three year performance period ending March 1, 2021 subject to continuation of a business relationship with the grantee through the conclusion of the performance period. The number above represents the target number of shares that may be delivered  pursuant to the award (\"Target Award\"); however, the amount that vests could range from zero to 150% of the Target Award."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Not applicable."}],"balance_after":363561,"source":{"system":"sec-edgar","filing":"0001179110-18-003696","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/792977/000117911018003696/edgar.xml","form_type":"4"}},{"id":4012807,"issuer":{"id":145305,"kind":"organization","name":"AMAG PHARMACEUTICALS, INC.","symbol":"AMAG"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2018-03-06T19:24:11.000Z","date":"2018-03-02","kind":"grant","acquired":true,"shares":45500,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Common Stock of AMAG Pharmaceuticals, Inc. (the \"Issuer\")."},{"field":"shares","element":"transactionShares","label":"F2","text":"These shares of Common Stock are issuable pursuant to a grant of RSUs pursuant to the Issuer's Fourth Amended and Restated 2007 Equity Incentive Plan (as amended the \"Plan\") and will vest in three equal annual installments with the first installment vesting on March 2, 2019."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Not applicable."}],"balance_after":318061,"source":{"system":"sec-edgar","filing":"0001179110-18-003696","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/792977/000117911018003696/edgar.xml","form_type":"4"}},{"id":4285277,"issuer":{"id":6828,"kind":"organization","name":"Atara Biotherapeutics, Inc.","symbol":"ATRA"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Non-Qualified Stock Option (Right to Buy)","published_at":"2017-06-12T21:27:07.000Z","date":"2017-06-08","kind":"grant","acquired":true,"shares":21500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The option shall vest on June 8, 2018, subject to the Reporting Person's continuous service."}],"balance_after":21500,"derivative":{"exercise_price":13.2,"expiration_date":"2024-06-08","underlying":"Common Stock","underlying_shares":21500},"source":{"system":"sec-edgar","filing":"0001209191-17-039236","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1214939/000120919117039236/doc4.xml","form_type":"4"}},{"id":4285276,"issuer":{"id":6828,"kind":"organization","name":"Atara Biotherapeutics, Inc.","symbol":"ATRA"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2017-06-12T21:27:07.000Z","date":"2017-06-08","kind":"grant","acquired":true,"shares":5000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These restricted stock units shall vest on June 8, 2018, subject to the Reporting Person's continuous service."}],"balance_after":7000,"source":{"system":"sec-edgar","filing":"0001209191-17-039236","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1214939/000120919117039236/doc4.xml","form_type":"4"}},{"id":4327365,"issuer":{"id":145305,"kind":"organization","name":"AMAG PHARMACEUTICALS, INC.","symbol":"AMAG"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2017-05-10T16:51:29.000Z","date":"2017-05-08","kind":"tax_withholding","acquired":false,"shares":19085,"price":18.55,"value":354026.75,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares withheld to satisfy the reporting person's tax obligations in connection with the vesting of 18,700 restricted stock units (\"RSUs\") on January 2, 2017, 9,999 RSUs on February 26, 2017, 3,900 RSUs on February 27, 2017, 3,600 RSUs on February 28, 2017 and 11,998 RSUs on March 1, 2017. Due to the black-out policies implemented by AMAG Pharmaceuticals, Inc. (the \"Issuer\"), the shares of the Issuer's Common Stock underlying such vested RSUs were not delivered to the reporting person until May 8, 2017, at which time an aggregate of 19,085 shares were withheld to satisfy the reporting person's applicable tax obligations."}],"balance_after":272561,"source":{"system":"sec-edgar","filing":"0001179110-17-006989","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/792977/000117911017006989/edgar.xml","form_type":"4"}},{"id":4423073,"issuer":{"id":145305,"kind":"organization","name":"AMAG PHARMACEUTICALS, INC.","symbol":"AMAG"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Stock Option (Right to Buy)","published_at":"2017-02-27T19:04:54.000Z","date":"2017-02-23","kind":"grant","acquired":true,"shares":65000,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Not applicable."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"Grant of stock option pursuant to the Plan. This option will vest and become exercisable over four years after the grant date as follows: (i) 25% on the first anniversary of the grant date and (ii) the balance vesting in equal quarterly installments over the next three years thereafter."}],"balance_after":65000,"derivative":{"exercise_price":23.75,"expiration_date":"2027-02-23","underlying":"Common Stock","underlying_shares":65000},"source":{"system":"sec-edgar","filing":"0001179110-17-003324","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/792977/000117911017003324/edgar.xml","form_type":"4"}},{"id":4423072,"issuer":{"id":145305,"kind":"organization","name":"AMAG PHARMACEUTICALS, INC.","symbol":"AMAG"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2017-02-27T19:04:54.000Z","date":"2017-02-23","kind":"grant","acquired":true,"shares":55000,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Common Stock of AMAG Pharmaceuticals, Inc. (the \"Issuer\")."},{"field":"shares","element":"transactionShares","label":"F4","text":"These shares of Common Stock are issuable pursuant to a performance-based RSU grant under a long-term incentive program under the Plan and will be earned, if at all, based on achievement of certain relative total stockholder return targets over the three year performance period ending December 31, 2019 subject to continuation of a business relationship with the grantee through the conclusion of the performance period. The number above represents the target number of shares that may be delivered  pursuant to the award (\"Target Award\"); however, the amount that vests could range from zero to 150% of the Target Award."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Not applicable."}],"balance_after":291646,"source":{"system":"sec-edgar","filing":"0001179110-17-003324","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/792977/000117911017003324/edgar.xml","form_type":"4"}},{"id":4423071,"issuer":{"id":145305,"kind":"organization","name":"AMAG PHARMACEUTICALS, INC.","symbol":"AMAG"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2017-02-27T19:04:54.000Z","date":"2017-02-23","kind":"grant","acquired":true,"shares":30000,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Common Stock of AMAG Pharmaceuticals, Inc. (the \"Issuer\")."},{"field":"shares","element":"transactionShares","label":"F2","text":"These shares of Common Stock are issuable pursuant to a grant of RSUs pursuant to the Issuer's Third Amended and Restated 2007 Equity Incentive Plan (as amended the \"Plan\") and will vest in three equal annual installments with the first installment vesting on February 23, 2018."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Not applicable."}],"balance_after":236646,"source":{"system":"sec-edgar","filing":"0001179110-17-003324","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/792977/000117911017003324/edgar.xml","form_type":"4"}},{"id":4497970,"issuer":{"id":6828,"kind":"organization","name":"Atara Biotherapeutics, Inc.","symbol":"ATRA"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Non-Qualified Stock Option (Right to Buy)","published_at":"2017-01-05T22:36:30.000Z","date":"2017-01-03","kind":"grant","acquired":true,"shares":5500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The option shall vest on June 8, 2017, the date of the Company's annual stockholder meeting, subject to the Reporting Person's continuous service."}],"balance_after":5500,"derivative":{"exercise_price":15.08,"expiration_date":"2024-01-03","underlying":"Common Stock","underlying_shares":5500},"source":{"system":"sec-edgar","filing":"0001209191-17-002265","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1214939/000120919117002265/doc4.xml","form_type":"4"}},{"id":4497969,"issuer":{"id":6828,"kind":"organization","name":"Atara Biotherapeutics, Inc.","symbol":"ATRA"},"owners":[{"id":39201,"kind":"person","name":"HEIDEN WILLIAM K","position":1,"cik":"0001214939","reported_name":"HEIDEN WILLIAM K","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2017-01-05T22:36:30.000Z","date":"2017-01-03","kind":"grant","acquired":true,"shares":2000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These restricted stock units shall vest on June 8, 2017, the date of the Company's annual stockholder meeting, subject to the Reporting Person's continuous service."}],"balance_after":2000,"source":{"system":"sec-edgar","filing":"0001209191-17-002265","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1214939/000120919117002265/doc4.xml","form_type":"4"}}]}