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(\"Merger Sub\"), a wholly owned subsidiary of Parent, pursuant to which, at 12:01 a.m. EST on December 14, 2023, the effective time of the Merger (the \"Effective Time\"), Merger Sub merged with and into the Issuer, with the Issuer surviving as a subsidiary of Parent (the \"Merger\")."},{"field":"price","element":"transactionPricePerShare","label":"F8","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding performance-based restricted stock unit granted in August 2023 (each, a \"Company August 2023 PSU\") that was unvested as of immediately prior to the Effective Time, was cancelled and converted into the right to receive a Parent cash-based award with respect to an amount in cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company August 2023 PSU, based on target performance."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F8","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding performance-based restricted stock unit granted in August 2023 (each, a \"Company August 2023 PSU\") that was unvested as of immediately prior to the Effective Time, was cancelled and converted into the right to receive a Parent cash-based award with respect to an amount in cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company August 2023 PSU, based on target performance."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F8","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding performance-based restricted stock unit granted in August 2023 (each, a \"Company August 2023 PSU\") that was unvested as of immediately prior to the Effective Time, was cancelled and converted into the right to receive a Parent cash-based award with respect to an amount in cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company August 2023 PSU, based on target performance."}],"balance_after":0,"derivative":{"underlying":"Common stock","underlying_shares":1165},"source":{"system":"sec-edgar","filing":"0000950170-23-070875","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":27,"url":"https://www.sec.gov/Archives/edgar/data/1060736/000095017023070875/ownership.xml","form_type":"4"}},{"id":1709924,"issuer":{"id":13956,"kind":"organization","name":"Seagen Inc.","symbol":"SGEN"},"owners":[{"id":33887,"kind":"person","name":"LIU JEAN I","position":1,"cik":"0001241357","reported_name":"LIU JEAN I","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Legal Officer"}}],"security":"Performance Stock Units","published_at":"2023-12-15T18:32:04.000Z","date":"2023-12-14","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":1305,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F7","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding \"Company Products PSU\" (as defined in the Merger Agreement) that was unvested as of immediately prior to the Effective Time was cancelled and converted into the right to receive a Parent cash-based award subject to the same performance-based vesting requirements with respect to an amount in cash that is equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company Products PSU."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Reflects the disposition of shares of common stock, par value $0.001 per share (\"Common Stock\"), of Seagen Inc. (\"Issuer\"), or of equity awards in respect of such Common Stock, as applicable, in connection with the consummation of the transactions contemplated by the Agreement and Plan of Merger, dated as of March 12, 2023 (the \"Merger Agreement\"), by and among the Issuer, Pfizer Inc. (\"Parent\") and Aris Merger Sub, Inc. (\"Merger Sub\"), a wholly owned subsidiary of Parent, pursuant to which, at 12:01 a.m. EST on December 14, 2023, the effective time of the Merger (the \"Effective Time\"), Merger Sub merged with and into the Issuer, with the Issuer surviving as a subsidiary of Parent (the \"Merger\")."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding \"Company Products PSU\" (as defined in the Merger Agreement) that was unvested as of immediately prior to the Effective Time was cancelled and converted into the right to receive a Parent cash-based award subject to the same performance-based vesting requirements with respect to an amount in cash that is equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company Products PSU."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding \"Company Products PSU\" (as defined in the Merger Agreement) that was unvested as of immediately prior to the Effective Time was cancelled and converted into the right to receive a Parent cash-based award subject to the same performance-based vesting requirements with respect to an amount in cash that is equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company Products PSU."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F7","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding \"Company Products PSU\" (as defined in the Merger Agreement) that was unvested as of immediately prior to the Effective Time was cancelled and converted into the right to receive a Parent cash-based award subject to the same performance-based vesting requirements with respect to an amount in cash that is equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company Products PSU."}],"balance_after":0,"derivative":{"underlying":"Common stock","underlying_shares":1305},"source":{"system":"sec-edgar","filing":"0000950170-23-070875","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":26,"url":"https://www.sec.gov/Archives/edgar/data/1060736/000095017023070875/ownership.xml","form_type":"4"}},{"id":1709923,"issuer":{"id":13956,"kind":"organization","name":"Seagen Inc.","symbol":"SGEN"},"owners":[{"id":33887,"kind":"person","name":"LIU JEAN I","position":1,"cik":"0001241357","reported_name":"LIU JEAN I","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Legal Officer"}}],"security":"Performance Stock Units","published_at":"2023-12-15T18:32:04.000Z","date":"2023-12-14","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":874,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F6","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding performance-based restricted stock unit (each, a \"Company PSU\"), other than any Company Products PSU or any Company August 2023 PSU (each, as defined below), was cancelled and converted into the right to receive cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company PSU, based on the greater of the target and actual performance. Amounts are shown here based on actual performance."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Reflects the disposition of shares of common stock, par value $0.001 per share (\"Common Stock\"), of Seagen Inc. (\"Issuer\"), or of equity awards in respect of such Common Stock, as applicable, in connection with the consummation of the transactions contemplated by the Agreement and Plan of Merger, dated as of March 12, 2023 (the \"Merger Agreement\"), by and among the Issuer, Pfizer Inc. (\"Parent\") and Aris Merger Sub, Inc. (\"Merger Sub\"), a wholly owned subsidiary of Parent, pursuant to which, at 12:01 a.m. EST on December 14, 2023, the effective time of the Merger (the \"Effective Time\"), Merger Sub merged with and into the Issuer, with the Issuer surviving as a subsidiary of Parent (the \"Merger\")."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding performance-based restricted stock unit (each, a \"Company PSU\"), other than any Company Products PSU or any Company August 2023 PSU (each, as defined below), was cancelled and converted into the right to receive cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company PSU, based on the greater of the target and actual performance. Amounts are shown here based on actual performance."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding performance-based restricted stock unit (each, a \"Company PSU\"), other than any Company Products PSU or any Company August 2023 PSU (each, as defined below), was cancelled and converted into the right to receive cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company PSU, based on the greater of the target and actual performance. Amounts are shown here based on actual performance."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding performance-based restricted stock unit (each, a \"Company PSU\"), other than any Company Products PSU or any Company August 2023 PSU (each, as defined below), was cancelled and converted into the right to receive cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company PSU, based on the greater of the target and actual performance. Amounts are shown here based on actual performance."}],"balance_after":0,"derivative":{"underlying":"Common stock","underlying_shares":874},"source":{"system":"sec-edgar","filing":"0000950170-23-070875","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":25,"url":"https://www.sec.gov/Archives/edgar/data/1060736/000095017023070875/ownership.xml","form_type":"4"}},{"id":1709922,"issuer":{"id":13956,"kind":"organization","name":"Seagen Inc.","symbol":"SGEN"},"owners":[{"id":33887,"kind":"person","name":"LIU JEAN I","position":1,"cik":"0001241357","reported_name":"LIU JEAN I","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Legal Officer"}}],"security":"Performance Stock Units","published_at":"2023-12-15T18:32:04.000Z","date":"2023-12-14","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":1457,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F6","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding performance-based restricted stock unit (each, a \"Company PSU\"), other than any Company Products PSU or any Company August 2023 PSU (each, as defined below), was cancelled and converted into the right to receive cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company PSU, based on the greater of the target and actual performance. Amounts are shown here based on actual performance."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Reflects the disposition of shares of common stock, par value $0.001 per share (\"Common Stock\"), of Seagen Inc. (\"Issuer\"), or of equity awards in respect of such Common Stock, as applicable, in connection with the consummation of the transactions contemplated by the Agreement and Plan of Merger, dated as of March 12, 2023 (the \"Merger Agreement\"), by and among the Issuer, Pfizer Inc. (\"Parent\") and Aris Merger Sub, Inc. (\"Merger Sub\"), a wholly owned subsidiary of Parent, pursuant to which, at 12:01 a.m. EST on December 14, 2023, the effective time of the Merger (the \"Effective Time\"), Merger Sub merged with and into the Issuer, with the Issuer surviving as a subsidiary of Parent (the \"Merger\")."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding performance-based restricted stock unit (each, a \"Company PSU\"), other than any Company Products PSU or any Company August 2023 PSU (each, as defined below), was cancelled and converted into the right to receive cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company PSU, based on the greater of the target and actual performance. Amounts are shown here based on actual performance."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding performance-based restricted stock unit (each, a \"Company PSU\"), other than any Company Products PSU or any Company August 2023 PSU (each, as defined below), was cancelled and converted into the right to receive cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company PSU, based on the greater of the target and actual performance. Amounts are shown here based on actual performance."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding performance-based restricted stock unit (each, a \"Company PSU\"), other than any Company Products PSU or any Company August 2023 PSU (each, as defined below), was cancelled and converted into the right to receive cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company PSU, based on the greater of the target and actual performance. Amounts are shown here based on actual performance."}],"balance_after":0,"derivative":{"underlying":"Common stock","underlying_shares":1457},"source":{"system":"sec-edgar","filing":"0000950170-23-070875","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":24,"url":"https://www.sec.gov/Archives/edgar/data/1060736/000095017023070875/ownership.xml","form_type":"4"}},{"id":1709921,"issuer":{"id":13956,"kind":"organization","name":"Seagen Inc.","symbol":"SGEN"},"owners":[{"id":33887,"kind":"person","name":"LIU JEAN I","position":1,"cik":"0001241357","reported_name":"LIU JEAN I","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Legal Officer"}}],"security":"Performance Stock Units","published_at":"2023-12-15T18:32:04.000Z","date":"2023-12-14","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":12688,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F6","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding performance-based restricted stock unit (each, a \"Company PSU\"), other than any Company Products PSU or any Company August 2023 PSU (each, as defined below), was cancelled and converted into the right to receive cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company PSU, based on the greater of the target and actual performance. Amounts are shown here based on actual performance."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Reflects the disposition of shares of common stock, par value $0.001 per share (\"Common Stock\"), of Seagen Inc. (\"Issuer\"), or of equity awards in respect of such Common Stock, as applicable, in connection with the consummation of the transactions contemplated by the Agreement and Plan of Merger, dated as of March 12, 2023 (the \"Merger Agreement\"), by and among the Issuer, Pfizer Inc. (\"Parent\") and Aris Merger Sub, Inc. (\"Merger Sub\"), a wholly owned subsidiary of Parent, pursuant to which, at 12:01 a.m. EST on December 14, 2023, the effective time of the Merger (the \"Effective Time\"), Merger Sub merged with and into the Issuer, with the Issuer surviving as a subsidiary of Parent (the \"Merger\")."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding performance-based restricted stock unit (each, a \"Company PSU\"), other than any Company Products PSU or any Company August 2023 PSU (each, as defined below), was cancelled and converted into the right to receive cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company PSU, based on the greater of the target and actual performance. Amounts are shown here based on actual performance."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding performance-based restricted stock unit (each, a \"Company PSU\"), other than any Company Products PSU or any Company August 2023 PSU (each, as defined below), was cancelled and converted into the right to receive cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company PSU, based on the greater of the target and actual performance. Amounts are shown here based on actual performance."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding performance-based restricted stock unit (each, a \"Company PSU\"), other than any Company Products PSU or any Company August 2023 PSU (each, as defined below), was cancelled and converted into the right to receive cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company PSU, based on the greater of the target and actual performance. Amounts are shown here based on actual performance."}],"balance_after":0,"derivative":{"underlying":"Common stock","underlying_shares":12688},"source":{"system":"sec-edgar","filing":"0000950170-23-070875","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":23,"url":"https://www.sec.gov/Archives/edgar/data/1060736/000095017023070875/ownership.xml","form_type":"4"}},{"id":1709920,"issuer":{"id":13956,"kind":"organization","name":"Seagen Inc.","symbol":"SGEN"},"owners":[{"id":33887,"kind":"person","name":"LIU JEAN I","position":1,"cik":"0001241357","reported_name":"LIU JEAN I","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Legal Officer"}}],"security":"Performance Stock Units","published_at":"2023-12-15T18:32:04.000Z","date":"2023-12-14","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":9423,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F6","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding performance-based restricted stock unit (each, a \"Company PSU\"), other than any Company Products PSU or any Company August 2023 PSU (each, as defined below), was cancelled and converted into the right to receive cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company PSU, based on the greater of the target and actual performance. Amounts are shown here based on actual performance."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Reflects the disposition of shares of common stock, par value $0.001 per share (\"Common Stock\"), of Seagen Inc. (\"Issuer\"), or of equity awards in respect of such Common Stock, as applicable, in connection with the consummation of the transactions contemplated by the Agreement and Plan of Merger, dated as of March 12, 2023 (the \"Merger Agreement\"), by and among the Issuer, Pfizer Inc. (\"Parent\") and Aris Merger Sub, Inc. (\"Merger Sub\"), a wholly owned subsidiary of Parent, pursuant to which, at 12:01 a.m. EST on December 14, 2023, the effective time of the Merger (the \"Effective Time\"), Merger Sub merged with and into the Issuer, with the Issuer surviving as a subsidiary of Parent (the \"Merger\")."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding performance-based restricted stock unit (each, a \"Company PSU\"), other than any Company Products PSU or any Company August 2023 PSU (each, as defined below), was cancelled and converted into the right to receive cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company PSU, based on the greater of the target and actual performance. Amounts are shown here based on actual performance."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding performance-based restricted stock unit (each, a \"Company PSU\"), other than any Company Products PSU or any Company August 2023 PSU (each, as defined below), was cancelled and converted into the right to receive cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company PSU, based on the greater of the target and actual performance. Amounts are shown here based on actual performance."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding performance-based restricted stock unit (each, a \"Company PSU\"), other than any Company Products PSU or any Company August 2023 PSU (each, as defined below), was cancelled and converted into the right to receive cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company PSU, based on the greater of the target and actual performance. Amounts are shown here based on actual performance."}],"balance_after":0,"derivative":{"underlying":"Common stock","underlying_shares":9423},"source":{"system":"sec-edgar","filing":"0000950170-23-070875","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":22,"url":"https://www.sec.gov/Archives/edgar/data/1060736/000095017023070875/ownership.xml","form_type":"4"}},{"id":1709919,"issuer":{"id":13956,"kind":"organization","name":"Seagen Inc.","symbol":"SGEN"},"owners":[{"id":33887,"kind":"person","name":"LIU JEAN I","position":1,"cik":"0001241357","reported_name":"LIU JEAN I","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Legal Officer"}}],"security":"Performance Stock Units","published_at":"2023-12-15T18:32:04.000Z","date":"2023-12-14","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":5554,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F6","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding performance-based restricted stock unit (each, a \"Company PSU\"), other than any Company Products PSU or any Company August 2023 PSU (each, as defined below), was cancelled and converted into the right to receive cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company PSU, based on the greater of the target and actual performance. Amounts are shown here based on actual performance."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Reflects the disposition of shares of common stock, par value $0.001 per share (\"Common Stock\"), of Seagen Inc. (\"Issuer\"), or of equity awards in respect of such Common Stock, as applicable, in connection with the consummation of the transactions contemplated by the Agreement and Plan of Merger, dated as of March 12, 2023 (the \"Merger Agreement\"), by and among the Issuer, Pfizer Inc. (\"Parent\") and Aris Merger Sub, Inc. (\"Merger Sub\"), a wholly owned subsidiary of Parent, pursuant to which, at 12:01 a.m. EST on December 14, 2023, the effective time of the Merger (the \"Effective Time\"), Merger Sub merged with and into the Issuer, with the Issuer surviving as a subsidiary of Parent (the \"Merger\")."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding performance-based restricted stock unit (each, a \"Company PSU\"), other than any Company Products PSU or any Company August 2023 PSU (each, as defined below), was cancelled and converted into the right to receive cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company PSU, based on the greater of the target and actual performance. Amounts are shown here based on actual performance."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding performance-based restricted stock unit (each, a \"Company PSU\"), other than any Company Products PSU or any Company August 2023 PSU (each, as defined below), was cancelled and converted into the right to receive cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company PSU, based on the greater of the target and actual performance. Amounts are shown here based on actual performance."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding performance-based restricted stock unit (each, a \"Company PSU\"), other than any Company Products PSU or any Company August 2023 PSU (each, as defined below), was cancelled and converted into the right to receive cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company PSU, based on the greater of the target and actual performance. Amounts are shown here based on actual performance."}],"balance_after":0,"derivative":{"underlying":"Common stock","underlying_shares":5554},"source":{"system":"sec-edgar","filing":"0000950170-23-070875","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":21,"url":"https://www.sec.gov/Archives/edgar/data/1060736/000095017023070875/ownership.xml","form_type":"4"}},{"id":1709918,"issuer":{"id":13956,"kind":"organization","name":"Seagen Inc.","symbol":"SGEN"},"owners":[{"id":33887,"kind":"person","name":"LIU JEAN I","position":1,"cik":"0001241357","reported_name":"LIU JEAN I","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Legal Officer"}}],"security":"Performance Stock Units","published_at":"2023-12-15T18:32:04.000Z","date":"2023-12-14","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":583,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F6","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding performance-based restricted stock unit (each, a \"Company PSU\"), other than any Company Products PSU or any Company August 2023 PSU (each, as defined below), was cancelled and converted into the right to receive cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company PSU, based on the greater of the target and actual performance. Amounts are shown here based on actual performance."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Reflects the disposition of shares of common stock, par value $0.001 per share (\"Common Stock\"), of Seagen Inc. (\"Issuer\"), or of equity awards in respect of such Common Stock, as applicable, in connection with the consummation of the transactions contemplated by the Agreement and Plan of Merger, dated as of March 12, 2023 (the \"Merger Agreement\"), by and among the Issuer, Pfizer Inc. (\"Parent\") and Aris Merger Sub, Inc. (\"Merger Sub\"), a wholly owned subsidiary of Parent, pursuant to which, at 12:01 a.m. EST on December 14, 2023, the effective time of the Merger (the \"Effective Time\"), Merger Sub merged with and into the Issuer, with the Issuer surviving as a subsidiary of Parent (the \"Merger\")."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding performance-based restricted stock unit (each, a \"Company PSU\"), other than any Company Products PSU or any Company August 2023 PSU (each, as defined below), was cancelled and converted into the right to receive cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company PSU, based on the greater of the target and actual performance. Amounts are shown here based on actual performance."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding performance-based restricted stock unit (each, a \"Company PSU\"), other than any Company Products PSU or any Company August 2023 PSU (each, as defined below), was cancelled and converted into the right to receive cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company PSU, based on the greater of the target and actual performance. Amounts are shown here based on actual performance."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding performance-based restricted stock unit (each, a \"Company PSU\"), other than any Company Products PSU or any Company August 2023 PSU (each, as defined below), was cancelled and converted into the right to receive cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company PSU, based on the greater of the target and actual performance. Amounts are shown here based on actual performance."}],"balance_after":0,"derivative":{"underlying":"Common stock","underlying_shares":583},"source":{"system":"sec-edgar","filing":"0000950170-23-070875","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":20,"url":"https://www.sec.gov/Archives/edgar/data/1060736/000095017023070875/ownership.xml","form_type":"4"}},{"id":1709917,"issuer":{"id":13956,"kind":"organization","name":"Seagen Inc.","symbol":"SGEN"},"owners":[{"id":33887,"kind":"person","name":"LIU JEAN I","position":1,"cik":"0001241357","reported_name":"LIU JEAN I","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Legal Officer"}}],"security":"Performance Stock Units","published_at":"2023-12-15T18:32:04.000Z","date":"2023-12-14","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":3662,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F6","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding performance-based restricted stock unit (each, a \"Company PSU\"), other than any Company Products PSU or any Company August 2023 PSU (each, as defined below), was cancelled and converted into the right to receive cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company PSU, based on the greater of the target and actual performance. Amounts are shown here based on actual performance."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Reflects the disposition of shares of common stock, par value $0.001 per share (\"Common Stock\"), of Seagen Inc. (\"Issuer\"), or of equity awards in respect of such Common Stock, as applicable, in connection with the consummation of the transactions contemplated by the Agreement and Plan of Merger, dated as of March 12, 2023 (the \"Merger Agreement\"), by and among the Issuer, Pfizer Inc. (\"Parent\") and Aris Merger Sub, Inc. (\"Merger Sub\"), a wholly owned subsidiary of Parent, pursuant to which, at 12:01 a.m. EST on December 14, 2023, the effective time of the Merger (the \"Effective Time\"), Merger Sub merged with and into the Issuer, with the Issuer surviving as a subsidiary of Parent (the \"Merger\")."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding performance-based restricted stock unit (each, a \"Company PSU\"), other than any Company Products PSU or any Company August 2023 PSU (each, as defined below), was cancelled and converted into the right to receive cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company PSU, based on the greater of the target and actual performance. Amounts are shown here based on actual performance."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding performance-based restricted stock unit (each, a \"Company PSU\"), other than any Company Products PSU or any Company August 2023 PSU (each, as defined below), was cancelled and converted into the right to receive cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company PSU, based on the greater of the target and actual performance. Amounts are shown here based on actual performance."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding performance-based restricted stock unit (each, a \"Company PSU\"), other than any Company Products PSU or any Company August 2023 PSU (each, as defined below), was cancelled and converted into the right to receive cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company PSU, based on the greater of the target and actual performance. Amounts are shown here based on actual performance."}],"balance_after":0,"derivative":{"underlying":"Common stock","underlying_shares":3662},"source":{"system":"sec-edgar","filing":"0000950170-23-070875","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":19,"url":"https://www.sec.gov/Archives/edgar/data/1060736/000095017023070875/ownership.xml","form_type":"4"}},{"id":1709916,"issuer":{"id":13956,"kind":"organization","name":"Seagen Inc.","symbol":"SGEN"},"owners":[{"id":33887,"kind":"person","name":"LIU JEAN I","position":1,"cik":"0001241357","reported_name":"LIU JEAN I","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Legal Officer"}}],"security":"Performance Stock Units","published_at":"2023-12-15T18:32:04.000Z","date":"2023-12-14","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":2708,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F6","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding performance-based restricted stock unit (each, a \"Company PSU\"), other than any Company Products PSU or any Company August 2023 PSU (each, as defined below), was cancelled and converted into the right to receive cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company PSU, based on the greater of the target and actual performance. Amounts are shown here based on actual performance."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Reflects the disposition of shares of common stock, par value $0.001 per share (\"Common Stock\"), of Seagen Inc. (\"Issuer\"), or of equity awards in respect of such Common Stock, as applicable, in connection with the consummation of the transactions contemplated by the Agreement and Plan of Merger, dated as of March 12, 2023 (the \"Merger Agreement\"), by and among the Issuer, Pfizer Inc. (\"Parent\") and Aris Merger Sub, Inc. (\"Merger Sub\"), a wholly owned subsidiary of Parent, pursuant to which, at 12:01 a.m. EST on December 14, 2023, the effective time of the Merger (the \"Effective Time\"), Merger Sub merged with and into the Issuer, with the Issuer surviving as a subsidiary of Parent (the \"Merger\")."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding performance-based restricted stock unit (each, a \"Company PSU\"), other than any Company Products PSU or any Company August 2023 PSU (each, as defined below), was cancelled and converted into the right to receive cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company PSU, based on the greater of the target and actual performance. Amounts are shown here based on actual performance."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding performance-based restricted stock unit (each, a \"Company PSU\"), other than any Company Products PSU or any Company August 2023 PSU (each, as defined below), was cancelled and converted into the right to receive cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company PSU, based on the greater of the target and actual performance. Amounts are shown here based on actual performance."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding performance-based restricted stock unit (each, a \"Company PSU\"), other than any Company Products PSU or any Company August 2023 PSU (each, as defined below), was cancelled and converted into the right to receive cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company PSU, based on the greater of the target and actual performance. Amounts are shown here based on actual performance."}],"balance_after":0,"derivative":{"underlying":"Common stock","underlying_shares":2708},"source":{"system":"sec-edgar","filing":"0000950170-23-070875","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":18,"url":"https://www.sec.gov/Archives/edgar/data/1060736/000095017023070875/ownership.xml","form_type":"4"}},{"id":1709915,"issuer":{"id":13956,"kind":"organization","name":"Seagen Inc.","symbol":"SGEN"},"owners":[{"id":33887,"kind":"person","name":"LIU JEAN I","position":1,"cik":"0001241357","reported_name":"LIU JEAN I","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Legal Officer"}}],"security":"Restricted Stock Units","published_at":"2023-12-15T18:32:04.000Z","date":"2023-12-14","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":13107,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding Company RSU granted after March 12, 2023 that was unvested as of immediately prior to the Effective Time (each, a \"Post-Signing Company RSU\") was cancelled and converted into the right to receive a Parent cash-based award subject to service-based vesting requirements with respect to an amount in cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Post-Signing Company RSU."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Reflects the disposition of shares of common stock, par value $0.001 per share (\"Common Stock\"), of Seagen Inc. (\"Issuer\"), or of equity awards in respect of such Common Stock, as applicable, in connection with the consummation of the transactions contemplated by the Agreement and Plan of Merger, dated as of March 12, 2023 (the \"Merger Agreement\"), by and among the Issuer, Pfizer Inc. (\"Parent\") and Aris Merger Sub, Inc. (\"Merger Sub\"), a wholly owned subsidiary of Parent, pursuant to which, at 12:01 a.m. EST on December 14, 2023, the effective time of the Merger (the \"Effective Time\"), Merger Sub merged with and into the Issuer, with the Issuer surviving as a subsidiary of Parent (the \"Merger\")."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding Company RSU granted after March 12, 2023 that was unvested as of immediately prior to the Effective Time (each, a \"Post-Signing Company RSU\") was cancelled and converted into the right to receive a Parent cash-based award subject to service-based vesting requirements with respect to an amount in cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Post-Signing Company RSU."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding Company RSU granted after March 12, 2023 that was unvested as of immediately prior to the Effective Time (each, a \"Post-Signing Company RSU\") was cancelled and converted into the right to receive a Parent cash-based award subject to service-based vesting requirements with respect to an amount in cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Post-Signing Company RSU."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding Company RSU granted after March 12, 2023 that was unvested as of immediately prior to the Effective Time (each, a \"Post-Signing Company RSU\") was cancelled and converted into the right to receive a Parent cash-based award subject to service-based vesting requirements with respect to an amount in cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Post-Signing Company RSU."}],"balance_after":0,"derivative":{"underlying":"Common stock","underlying_shares":13107},"source":{"system":"sec-edgar","filing":"0000950170-23-070875","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":17,"url":"https://www.sec.gov/Archives/edgar/data/1060736/000095017023070875/ownership.xml","form_type":"4"}},{"id":1709914,"issuer":{"id":13956,"kind":"organization","name":"Seagen Inc.","symbol":"SGEN"},"owners":[{"id":33887,"kind":"person","name":"LIU JEAN I","position":1,"cik":"0001241357","reported_name":"LIU JEAN I","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Legal Officer"}}],"security":"Restricted Stock Units","published_at":"2023-12-15T18:32:04.000Z","date":"2023-12-14","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":1389,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding Company RSU granted after March 12, 2023 that was unvested as of immediately prior to the Effective Time (each, a \"Post-Signing Company RSU\") was cancelled and converted into the right to receive a Parent cash-based award subject to service-based vesting requirements with respect to an amount in cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Post-Signing Company RSU."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Reflects the disposition of shares of common stock, par value $0.001 per share (\"Common Stock\"), of Seagen Inc. (\"Issuer\"), or of equity awards in respect of such Common Stock, as applicable, in connection with the consummation of the transactions contemplated by the Agreement and Plan of Merger, dated as of March 12, 2023 (the \"Merger Agreement\"), by and among the Issuer, Pfizer Inc. (\"Parent\") and Aris Merger Sub, Inc. (\"Merger Sub\"), a wholly owned subsidiary of Parent, pursuant to which, at 12:01 a.m. EST on December 14, 2023, the effective time of the Merger (the \"Effective Time\"), Merger Sub merged with and into the Issuer, with the Issuer surviving as a subsidiary of Parent (the \"Merger\")."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding Company RSU granted after March 12, 2023 that was unvested as of immediately prior to the Effective Time (each, a \"Post-Signing Company RSU\") was cancelled and converted into the right to receive a Parent cash-based award subject to service-based vesting requirements with respect to an amount in cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Post-Signing Company RSU."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding Company RSU granted after March 12, 2023 that was unvested as of immediately prior to the Effective Time (each, a \"Post-Signing Company RSU\") was cancelled and converted into the right to receive a Parent cash-based award subject to service-based vesting requirements with respect to an amount in cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Post-Signing Company RSU."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding Company RSU granted after March 12, 2023 that was unvested as of immediately prior to the Effective Time (each, a \"Post-Signing Company RSU\") was cancelled and converted into the right to receive a Parent cash-based award subject to service-based vesting requirements with respect to an amount in cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Post-Signing Company RSU."}],"balance_after":0,"derivative":{"underlying":"Common stock","underlying_shares":1389},"source":{"system":"sec-edgar","filing":"0000950170-23-070875","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":16,"url":"https://www.sec.gov/Archives/edgar/data/1060736/000095017023070875/ownership.xml","form_type":"4"}},{"id":1709913,"issuer":{"id":13956,"kind":"organization","name":"Seagen Inc.","symbol":"SGEN"},"owners":[{"id":33887,"kind":"person","name":"LIU JEAN I","position":1,"cik":"0001241357","reported_name":"LIU JEAN I","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Legal Officer"}}],"security":"Restricted Stock Units","published_at":"2023-12-15T18:32:04.000Z","date":"2023-12-14","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":10298,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F4","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding restricted stock unit (each, a \"Company RSU\"), other than any Post-Signing Company RSU (as defined below), was cancelled and converted into the right to receive an amount in cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company RSU."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Reflects the disposition of shares of common stock, par value $0.001 per share (\"Common Stock\"), of Seagen Inc. (\"Issuer\"), or of equity awards in respect of such Common Stock, as applicable, in connection with the consummation of the transactions contemplated by the Agreement and Plan of Merger, dated as of March 12, 2023 (the \"Merger Agreement\"), by and among the Issuer, Pfizer Inc. (\"Parent\") and Aris Merger Sub, Inc. (\"Merger Sub\"), a wholly owned subsidiary of Parent, pursuant to which, at 12:01 a.m. EST on December 14, 2023, the effective time of the Merger (the \"Effective Time\"), Merger Sub merged with and into the Issuer, with the Issuer surviving as a subsidiary of Parent (the \"Merger\")."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding restricted stock unit (each, a \"Company RSU\"), other than any Post-Signing Company RSU (as defined below), was cancelled and converted into the right to receive an amount in cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company RSU."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding restricted stock unit (each, a \"Company RSU\"), other than any Post-Signing Company RSU (as defined below), was cancelled and converted into the right to receive an amount in cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company RSU."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding restricted stock unit (each, a \"Company RSU\"), other than any Post-Signing Company RSU (as defined below), was cancelled and converted into the right to receive an amount in cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company RSU."}],"balance_after":0,"derivative":{"underlying":"Common stock","underlying_shares":10298},"source":{"system":"sec-edgar","filing":"0000950170-23-070875","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":15,"url":"https://www.sec.gov/Archives/edgar/data/1060736/000095017023070875/ownership.xml","form_type":"4"}},{"id":1709912,"issuer":{"id":13956,"kind":"organization","name":"Seagen Inc.","symbol":"SGEN"},"owners":[{"id":33887,"kind":"person","name":"LIU JEAN I","position":1,"cik":"0001241357","reported_name":"LIU JEAN I","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Legal Officer"}}],"security":"Restricted Stock Units","published_at":"2023-12-15T18:32:04.000Z","date":"2023-12-14","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":4436,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F4","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding restricted stock unit (each, a \"Company RSU\"), other than any Post-Signing Company RSU (as defined below), was cancelled and converted into the right to receive an amount in cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company RSU."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Reflects the disposition of shares of common stock, par value $0.001 per share (\"Common Stock\"), of Seagen Inc. (\"Issuer\"), or of equity awards in respect of such Common Stock, as applicable, in connection with the consummation of the transactions contemplated by the Agreement and Plan of Merger, dated as of March 12, 2023 (the \"Merger Agreement\"), by and among the Issuer, Pfizer Inc. (\"Parent\") and Aris Merger Sub, Inc. (\"Merger Sub\"), a wholly owned subsidiary of Parent, pursuant to which, at 12:01 a.m. EST on December 14, 2023, the effective time of the Merger (the \"Effective Time\"), Merger Sub merged with and into the Issuer, with the Issuer surviving as a subsidiary of Parent (the \"Merger\")."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding restricted stock unit (each, a \"Company RSU\"), other than any Post-Signing Company RSU (as defined below), was cancelled and converted into the right to receive an amount in cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company RSU."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding restricted stock unit (each, a \"Company RSU\"), other than any Post-Signing Company RSU (as defined below), was cancelled and converted into the right to receive an amount in cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company RSU."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding restricted stock unit (each, a \"Company RSU\"), other than any Post-Signing Company RSU (as defined below), was cancelled and converted into the right to receive an amount in cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company RSU."}],"balance_after":0,"derivative":{"underlying":"Common stock","underlying_shares":4436},"source":{"system":"sec-edgar","filing":"0000950170-23-070875","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":14,"url":"https://www.sec.gov/Archives/edgar/data/1060736/000095017023070875/ownership.xml","form_type":"4"}},{"id":1709911,"issuer":{"id":13956,"kind":"organization","name":"Seagen Inc.","symbol":"SGEN"},"owners":[{"id":33887,"kind":"person","name":"LIU JEAN I","position":1,"cik":"0001241357","reported_name":"LIU JEAN I","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Legal Officer"}}],"security":"Restricted Stock Units","published_at":"2023-12-15T18:32:04.000Z","date":"2023-12-14","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":4622,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F4","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding restricted stock unit (each, a \"Company RSU\"), other than any Post-Signing Company RSU (as defined below), was cancelled and converted into the right to receive an amount in cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company RSU."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Reflects the disposition of shares of common stock, par value $0.001 per share (\"Common Stock\"), of Seagen Inc. (\"Issuer\"), or of equity awards in respect of such Common Stock, as applicable, in connection with the consummation of the transactions contemplated by the Agreement and Plan of Merger, dated as of March 12, 2023 (the \"Merger Agreement\"), by and among the Issuer, Pfizer Inc. (\"Parent\") and Aris Merger Sub, Inc. (\"Merger Sub\"), a wholly owned subsidiary of Parent, pursuant to which, at 12:01 a.m. EST on December 14, 2023, the effective time of the Merger (the \"Effective Time\"), Merger Sub merged with and into the Issuer, with the Issuer surviving as a subsidiary of Parent (the \"Merger\")."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding restricted stock unit (each, a \"Company RSU\"), other than any Post-Signing Company RSU (as defined below), was cancelled and converted into the right to receive an amount in cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company RSU."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding restricted stock unit (each, a \"Company RSU\"), other than any Post-Signing Company RSU (as defined below), was cancelled and converted into the right to receive an amount in cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company RSU."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding restricted stock unit (each, a \"Company RSU\"), other than any Post-Signing Company RSU (as defined below), was cancelled and converted into the right to receive an amount in cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company RSU."}],"balance_after":0,"derivative":{"underlying":"Common stock","underlying_shares":4622},"source":{"system":"sec-edgar","filing":"0000950170-23-070875","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":13,"url":"https://www.sec.gov/Archives/edgar/data/1060736/000095017023070875/ownership.xml","form_type":"4"}},{"id":1709910,"issuer":{"id":13956,"kind":"organization","name":"Seagen Inc.","symbol":"SGEN"},"owners":[{"id":33887,"kind":"person","name":"LIU JEAN I","position":1,"cik":"0001241357","reported_name":"LIU JEAN I","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Legal Officer"}}],"security":"Restricted Stock Units","published_at":"2023-12-15T18:32:04.000Z","date":"2023-12-14","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":1798,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F4","text":"Pursuant to the Merger Agreement, at the Effective Time, each outstanding restricted stock unit (each, a \"Company RSU\"), other than any Post-Signing Company RSU (as defined below), was cancelled and converted into the right to receive an amount in cash equal to the product of (i) the Merger Consideration, multiplied by (ii) the number of shares of Common Stock then subject to such Company RSU."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Reflects the disposition of shares of common stock, par value $0.001 per share (\"Common Stock\"), of Seagen Inc. 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The Reporting Person hereby undertakes to provide upon request by the Securities and Exchange Commission staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the sales were effected."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Amount of securities beneficially owned following reported transactions includes restricted stock units subject to vesting."}],"balance_after":75313,"source":{"system":"sec-edgar","filing":"0000899243-21-042938","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1060736/000089924321042938/doc4.xml","form_type":"4"}},{"id":2527140,"issuer":{"id":13956,"kind":"organization","name":"Seagen Inc.","symbol":"SGEN"},"owners":[{"id":33887,"kind":"person","name":"LIU JEAN I","position":1,"cik":"0001241357","reported_name":"LIU JEAN I","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"GC/EVP, Leg Afairs"}}],"security":"Common Stock","published_at":"2021-11-03T21:18:09.000Z","date":"2021-11-01","kind":"sale","acquired":false,"shares":8776,"price":177.29,"value":1555897.04,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan entered into on November 13, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"Reflects sales of common stock executed in multiple transactions at prices ranging from $176.72 to $177.64. The price reported reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request by the Securities and Exchange Commission staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the sales were effected."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Amount of securities beneficially owned following reported transactions includes restricted stock units subject to vesting."}],"balance_after":89770,"source":{"system":"sec-edgar","filing":"0000899243-21-042938","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1060736/000089924321042938/doc4.xml","form_type":"4"}},{"id":2527139,"issuer":{"id":13956,"kind":"organization","name":"Seagen Inc.","symbol":"SGEN"},"owners":[{"id":33887,"kind":"person","name":"LIU JEAN I","position":1,"cik":"0001241357","reported_name":"LIU JEAN I","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"GC/EVP, Leg Afairs"}}],"security":"Common Stock","published_at":"2021-11-03T21:18:09.000Z","date":"2021-11-01","kind":"sale","acquired":false,"shares":753,"price":175.08,"value":131835.24,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan entered into on November 13, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"Reflects sales of common stock executed in multiple transactions at prices ranging from $174.71 to $175.69. The price reported reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request by the Securities and Exchange Commission staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the sales were effected."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Amount of securities beneficially owned following reported transactions includes restricted stock units subject to vesting."}],"balance_after":98546,"source":{"system":"sec-edgar","filing":"0000899243-21-042938","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1060736/000089924321042938/doc4.xml","form_type":"4"}},{"id":2527138,"issuer":{"id":13956,"kind":"organization","name":"Seagen Inc.","symbol":"SGEN"},"owners":[{"id":33887,"kind":"person","name":"LIU JEAN I","position":1,"cik":"0001241357","reported_name":"LIU JEAN I","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"GC/EVP, Leg Afairs"}}],"security":"Common Stock","published_at":"2021-11-03T21:18:09.000Z","date":"2021-11-01","kind":"sale","acquired":false,"shares":2588,"price":174.2,"value":450829.6,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan entered into on November 13, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"Reflects sales of common stock executed in multiple transactions at prices ranging from $173.59 to $174.44. The price reported reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request by the Securities and Exchange Commission staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the sales were effected."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Amount of securities beneficially owned following reported transactions includes restricted stock units subject to vesting."}],"balance_after":99299,"source":{"system":"sec-edgar","filing":"0000899243-21-042938","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1060736/000089924321042938/doc4.xml","form_type":"4"}},{"id":2527137,"issuer":{"id":13956,"kind":"organization","name":"Seagen Inc.","symbol":"SGEN"},"owners":[{"id":33887,"kind":"person","name":"LIU JEAN I","position":1,"cik":"0001241357","reported_name":"LIU JEAN I","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"GC/EVP, Leg Afairs"}}],"security":"Common Stock","published_at":"2021-11-03T21:18:09.000Z","date":"2021-11-01","kind":"sale","acquired":false,"shares":2080,"price":173,"value":359840.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan entered into on November 13, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Reflects sales of common stock executed in multiple transactions at prices ranging from $172.50 to $173.43. The price reported reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request by the Securities and Exchange Commission staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the sales were effected."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Amount of securities beneficially owned following reported transactions includes restricted stock units subject to vesting."}],"balance_after":101887,"source":{"system":"sec-edgar","filing":"0000899243-21-042938","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1060736/000089924321042938/doc4.xml","form_type":"4"}},{"id":2527136,"issuer":{"id":13956,"kind":"organization","name":"Seagen Inc.","symbol":"SGEN"},"owners":[{"id":33887,"kind":"person","name":"LIU JEAN I","position":1,"cik":"0001241357","reported_name":"LIU JEAN I","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"GC/EVP, Leg Afairs"}}],"security":"Common Stock","published_at":"2021-11-03T21:18:09.000Z","date":"2021-11-01","kind":"exercise","acquired":true,"shares":34876,"price":35.95,"value":1253792.2,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Amount of securities beneficially owned following reported transactions includes restricted stock units subject to vesting."}],"balance_after":103967,"source":{"system":"sec-edgar","filing":"0000899243-21-042938","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1060736/000089924321042938/doc4.xml","form_type":"4"}},{"id":2559157,"issuer":{"id":13956,"kind":"organization","name":"Seagen Inc.","symbol":"SGEN"},"owners":[{"id":33887,"kind":"person","name":"LIU JEAN I","position":1,"cik":"0001241357","reported_name":"LIU JEAN I","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"GC/EVP, Legal Affairs"}}],"security":"Common Stock","published_at":"2021-09-27T20:09:06.000Z","date":"2021-09-23","kind":"grant","acquired":true,"shares":160,"price":166.22,"value":26595.2,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"These shares represent restricted stock units and will be settled in common stock upon vesting."},{"field":"date","element":"transactionDate","label":"F2","text":"The performance criteria for these restricted stock units were met. These restricted stock units will become fully vested on 09/20/23, subject to continuous service with the Company until the vesting date."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Number of securities beneficially owned following reported transactions includes restricted stock units subject to vesting."}],"balance_after":69091,"source":{"system":"sec-edgar","filing":"0001203311-21-000075","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1060736/000120331121000075/edgardoc.xml","form_type":"4"}},{"id":2582296,"issuer":{"id":13956,"kind":"organization","name":"Seagen Inc.","symbol":"SGEN"},"owners":[{"id":33887,"kind":"person","name":"LIU JEAN I","position":1,"cik":"0001241357","reported_name":"LIU JEAN I","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"GC/EVP, Legal 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arising out of the vesting of previously granted restricted stock units."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Amount of securities beneficially owned following reported transactions includes restricted stock units subject to vesting."}],"balance_after":70686,"source":{"system":"sec-edgar","filing":"0000899243-21-034983","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1060736/000089924321034983/doc4.xml","form_type":"4"}},{"id":2598494,"issuer":{"id":13956,"kind":"organization","name":"Seagen Inc.","symbol":"SGEN"},"owners":[{"id":33887,"kind":"person","name":"LIU JEAN I","position":1,"cik":"0001241357","reported_name":"LIU JEAN I","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"GC/EVP, Leg Affairs"}}],"security":"Non-Qualified Stock Option (right to buy)","published_at":"2021-08-18T20:28:35.000Z","date":"2021-08-16","kind":"grant","acquired":true,"shares":21915,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"Options shall vest at a rate of 25% one year from grant date and monthly thereafter until all options are fully vested four years from grant date."}],"balance_after":21915,"derivative":{"exercise_price":155.87,"expiration_date":"2031-08-16","underlying":"Common Stock","underlying_shares":21915},"source":{"system":"sec-edgar","filing":"0001203311-21-000061","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1060736/000120331121000061/edgardoc.xml","form_type":"4"}},{"id":2598493,"issuer":{"id":13956,"kind":"organization","name":"Seagen Inc.","symbol":"SGEN"},"owners":[{"id":33887,"kind":"person","name":"LIU JEAN 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vesting."},{"field":"date","element":"transactionDate","label":"F4","text":"Shares shall vest at a rate of 25% on each anniversary of August 15, 2021 until all shares are fully vested at the end of four years."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Amount of securities beneficially owned following reported transactions includes restricted stock units subject to vesting."}],"balance_after":72579,"source":{"system":"sec-edgar","filing":"0001203311-21-000061","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1060736/000120331121000061/edgardoc.xml","form_type":"4"}}],"next_cursor":"2021-08-18T20:28:35.000000Z,2598492"}