{"transactions":[{"id":854597,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Deferred Stock Units","published_at":"2026-03-09T21:44:29.000Z","date":"2026-03-05","kind":"grant","planned":false,"acquired":true,"shares":98,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"Reflects cash fees that the director has elected to defer under the Company's deferred compensation plan, which are notionally invested in a measurement fund tracking the Company's common stock during the deferral period.  Each deferred stock unit is equal to one share of the Company's common stock, and becomes distributable in common stock upon the reporting person's separation from service as a member of the Board of Directors of the Company."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"Reflects cash fees that the director has elected to defer under the Company's deferred compensation plan, which are notionally invested in a measurement fund tracking the Company's common stock during the deferral period.  Each deferred stock unit is equal to one share of the Company's common stock, and becomes distributable in common stock upon the reporting person's separation from service as a member of the Board of Directors of the Company."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"Reflects cash fees that the director has elected to defer under the Company's deferred compensation plan, which are notionally invested in a measurement fund tracking the Company's common stock during the deferral period.  Each deferred stock unit is equal to one share of the Company's common stock, and becomes distributable in common stock upon the reporting person's separation from service as a member of the Board of Directors of the Company."}],"balance_after":98,"derivative":{"underlying":"Common Stock","underlying_shares":98},"source":{"system":"sec-edgar","filing":"0001004434-26-000027","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000100443426000027/form4.xml","form_type":"4"}},{"id":854596,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Stock Units","published_at":"2026-03-09T21:44:29.000Z","date":"2026-03-05","kind":"grant","planned":false,"acquired":true,"shares":171,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F4","text":"Each stock unit represents a right to receive one share of the Company's common stock upon vesting. The stock units vest in full on March 5, 2027."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"Each stock unit represents a right to receive one share of the Company's common stock upon vesting. The stock units vest in full on March 5, 2027."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"Each stock unit represents a right to receive one share of the Company's common stock upon vesting. The stock units vest in full on March 5, 2027."}],"balance_after":171,"derivative":{"underlying":"Common Stock","underlying_shares":171},"source":{"system":"sec-edgar","filing":"0001004434-26-000027","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000100443426000027/form4.xml","form_type":"4"}},{"id":854595,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Stock Units","published_at":"2026-03-09T21:44:29.000Z","date":"2026-03-05","kind":"exercise","planned":false,"acquired":false,"shares":867,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2023-2026."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2023-2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2023-2026."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Inclusive of previously reported deferred stock units."}],"balance_after":3709,"derivative":{"underlying":"Common Stock","underlying_shares":867},"source":{"system":"sec-edgar","filing":"0001004434-26-000027","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000100443426000027/form4.xml","form_type":"4"}},{"id":854594,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Common Stock","published_at":"2026-03-09T21:44:29.000Z","date":"2026-03-05","kind":"tax_withholding","planned":false,"acquired":false,"shares":67,"price":299.18,"value":20045.06,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Reflects the automatic surrender of shares of common stock to the Company to satisfy tax withholding obligations related to the vesting of the awards described above."}],"balance_after":13043,"source":{"system":"sec-edgar","filing":"0001004434-26-000027","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000100443426000027/form4.xml","form_type":"4"}},{"id":854593,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Common Stock","published_at":"2026-03-09T21:44:29.000Z","date":"2026-03-05","kind":"exercise","planned":false,"acquired":true,"shares":867,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2023-2026."}],"balance_after":13110,"source":{"system":"sec-edgar","filing":"0001004434-26-000027","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000100443426000027/form4.xml","form_type":"4"}},{"id":1002839,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Director Stock Option (Right to Buy)","published_at":"2025-11-12T21:56:54.000Z","date":"2025-11-07","kind":"exercise","planned":false,"acquired":false,"shares":560,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":0,"derivative":{"exercise_price":69.63,"exercise_date":"2024-08-15","expiration_date":"2027-07-28","underlying":"Common Stock","underlying_shares":560},"source":{"system":"sec-edgar","filing":"0001004434-25-000057","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000100443425000057/form4.xml","form_type":"4"}},{"id":1002838,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Common Stock","published_at":"2025-11-12T21:56:54.000Z","date":"2025-11-07","kind":"tax_withholding","planned":false,"acquired":false,"shares":182,"price":259.26,"value":47185.32,"ownership":{"direct":true},"balance_after":12243,"source":{"system":"sec-edgar","filing":"0001004434-25-000057","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000100443425000057/form4.xml","form_type":"4"}},{"id":1002837,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Common Stock","published_at":"2025-11-12T21:56:54.000Z","date":"2025-11-07","kind":"exercise","planned":false,"acquired":true,"shares":560,"price":69.63,"value":38992.8,"ownership":{"direct":true},"balance_after":12425,"source":{"system":"sec-edgar","filing":"0001004434-25-000057","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000100443425000057/form4.xml","form_type":"4"}},{"id":1064549,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Stock Units","published_at":"2025-08-18T21:11:52.000Z","date":"2025-08-15","kind":"exercise","planned":false,"acquired":false,"shares":1092,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2022-2027."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2022-2027."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2022-2027."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Inclusive of previously reported deferred stock units."}],"balance_after":4313,"derivative":{"underlying":"Common Stock","underlying_shares":1092},"source":{"system":"sec-edgar","filing":"0001127602-25-020600","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760225020600/form4.xml","form_type":"4"}},{"id":1064548,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Deferred Stock Units","published_at":"2025-08-18T21:11:52.000Z","date":"2025-08-14","kind":"grant","planned":false,"acquired":true,"shares":262,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Reflects cash fees that the director has elected to defer under the Company's deferred compensation plan, which are notionally invested in a measurement fund tracking the Company's common stock during the deferral period.  Each deferred stock unit is equal to one share of the Company's common stock, and becomes distributable in common stock upon the reporting person's separation from service as a member of the Board of Directors of the Company."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Reflects cash fees that the director has elected to defer under the Company's deferred compensation plan, which are notionally invested in a measurement fund tracking the Company's common stock during the deferral period.  Each deferred stock unit is equal to one share of the Company's common stock, and becomes distributable in common stock upon the reporting person's separation from service as a member of the Board of Directors of the Company."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Reflects cash fees that the director has elected to defer under the Company's deferred compensation plan, which are notionally invested in a measurement fund tracking the Company's common stock during the deferral period.  Each deferred stock unit is equal to one share of the Company's common stock, and becomes distributable in common stock upon the reporting person's separation from service as a member of the Board of Directors of the Company."}],"balance_after":262,"derivative":{"underlying":"Common Stock","underlying_shares":262},"source":{"system":"sec-edgar","filing":"0001127602-25-020600","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760225020600/form4.xml","form_type":"4"}},{"id":1064547,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Common Stock","published_at":"2025-08-18T21:11:52.000Z","date":"2025-08-15","kind":"tax_withholding","planned":false,"acquired":false,"shares":84,"price":218.7,"value":18370.8,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Reflects the automatic surrender of shares of common stock to the Company to satisfy tax withholding obligations related to the vesting of the awards described above."}],"balance_after":11865,"source":{"system":"sec-edgar","filing":"0001127602-25-020600","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760225020600/form4.xml","form_type":"4"}},{"id":1064546,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Common Stock","published_at":"2025-08-18T21:11:52.000Z","date":"2025-08-15","kind":"exercise","planned":false,"acquired":true,"shares":1092,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2022-2027."}],"balance_after":11949,"source":{"system":"sec-edgar","filing":"0001127602-25-020600","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760225020600/form4.xml","form_type":"4"}},{"id":1076730,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Restricted Stock Units","published_at":"2025-08-04T21:28:37.000Z","date":"2025-07-31","kind":"grant","planned":false,"acquired":true,"shares":477,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit represents a right to receive one share of the Company's common stock upon vesting. The restricted stock units vest in full on August 15, 2026."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Each restricted stock unit represents a right to receive one share of the Company's common stock upon vesting. The restricted stock units vest in full on August 15, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Each restricted stock unit represents a right to receive one share of the Company's common stock upon vesting. The restricted stock units vest in full on August 15, 2026."}],"balance_after":477,"derivative":{"underlying":"Common Stock","underlying_shares":477},"source":{"system":"sec-edgar","filing":"0001127602-25-020004","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760225020004/form4.xml","form_type":"4"}},{"id":1218269,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Stock Units","published_at":"2025-03-07T22:07:12.000Z","date":"2025-03-05","kind":"exercise","planned":false,"acquired":false,"shares":1178,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2022-2027."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2022-2027."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2022-2027."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Inclusive of previously reported deferred stock units."}],"balance_after":4928,"derivative":{"underlying":"Common Stock","underlying_shares":1178},"source":{"system":"sec-edgar","filing":"0001127602-25-008741","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760225008741/form4.xml","form_type":"4"}},{"id":1218268,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Common Stock","published_at":"2025-03-07T22:07:12.000Z","date":"2025-03-05","kind":"tax_withholding","planned":false,"acquired":false,"shares":90,"price":165.72,"value":14914.8,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Reflects the automatic surrender of shares of common stock to the Company to satisfy tax withholding obligations related to the vesting of the awards described above."}],"balance_after":10857,"source":{"system":"sec-edgar","filing":"0001127602-25-008741","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760225008741/form4.xml","form_type":"4"}},{"id":1218267,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Common Stock","published_at":"2025-03-07T22:07:12.000Z","date":"2025-03-05","kind":"exercise","planned":false,"acquired":true,"shares":1178,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2022-2027."}],"balance_after":10947,"source":{"system":"sec-edgar","filing":"0001127602-25-008741","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760225008741/form4.xml","form_type":"4"}},{"id":1277192,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Deferred Stock Units","published_at":"2025-02-10T22:02:02.000Z","date":"2025-02-06","kind":"grant","planned":false,"acquired":true,"shares":320,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Reflects cash fees that the director has elected to defer under the Company's deferred compensation plan, which are notionally invested in a measurement fund tracking the Company's common stock during the deferral period.  Each deferred stock unit is equal to one share of the Company's common stock, and becomes distributable in common stock upon the reporting person's separation from service as a member of the Board of Directors of the Company."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Reflects cash fees that the director has elected to defer under the Company's deferred compensation plan, which are notionally invested in a measurement fund tracking the Company's common stock during the deferral period.  Each deferred stock unit is equal to one share of the Company's common stock, and becomes distributable in common stock upon the reporting person's separation from service as a member of the Board of Directors of the Company."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Reflects cash fees that the director has elected to defer under the Company's deferred compensation plan, which are notionally invested in a measurement fund tracking the Company's common stock during the deferral period.  Each deferred stock unit is equal to one share of the Company's common stock, and becomes distributable in common stock upon the reporting person's separation from service as a member of the Board of Directors of the Company."}],"balance_after":320,"derivative":{"underlying":"Common Stock","underlying_shares":320},"source":{"system":"sec-edgar","filing":"0001127602-25-003875","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760225003875/form4.xml","form_type":"4"}},{"id":1277191,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Restricted Stock Units","published_at":"2025-02-10T22:02:02.000Z","date":"2025-02-06","kind":"grant","planned":false,"acquired":true,"shares":548,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit represents a right to receive one share of the Company's common stock upon vesting. The restricted stock units vest in full on March 5, 2026."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Each restricted stock unit represents a right to receive one share of the Company's common stock upon vesting. The restricted stock units vest in full on March 5, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Each restricted stock unit represents a right to receive one share of the Company's common stock upon vesting. The restricted stock units vest in full on March 5, 2026."}],"balance_after":548,"derivative":{"underlying":"Common Stock","underlying_shares":548},"source":{"system":"sec-edgar","filing":"0001127602-25-003875","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760225003875/form4.xml","form_type":"4"}},{"id":1431841,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Stock Units","published_at":"2024-08-16T21:01:43.000Z","date":"2024-08-15","kind":"exercise","planned":false,"acquired":false,"shares":928,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2021-2027."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2021-2027."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2021-2027."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Inclusive of previously reported deferred stock units."}],"balance_after":5238,"derivative":{"underlying":"Common Stock","underlying_shares":928},"source":{"system":"sec-edgar","filing":"0001127602-24-022371","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760224022371/form4.xml","form_type":"4"}},{"id":1431840,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Common Stock","published_at":"2024-08-16T21:01:43.000Z","date":"2024-08-15","kind":"tax_withholding","planned":false,"acquired":false,"shares":72,"price":171.98,"value":12382.56,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Reflects the automatic surrender of shares of common stock to the Company to satisfy tax withholding obligations related to the vesting of the awards described above."}],"balance_after":9769,"source":{"system":"sec-edgar","filing":"0001127602-24-022371","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760224022371/form4.xml","form_type":"4"}},{"id":1431839,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Common Stock","published_at":"2024-08-16T21:01:43.000Z","date":"2024-08-15","kind":"exercise","planned":false,"acquired":true,"shares":928,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2021-2027."}],"balance_after":9841,"source":{"system":"sec-edgar","filing":"0001127602-24-022371","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760224022371/form4.xml","form_type":"4"}},{"id":1445621,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Director Stock Option (Right to Buy)","published_at":"2024-07-31T22:52:09.000Z","date":"2024-07-31","kind":"exercise","planned":false,"acquired":false,"shares":1679,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":560,"derivative":{"exercise_price":69.63,"exercise_date":"2023-08-15","expiration_date":"2027-07-28","underlying":"Common Stock","underlying_shares":1679},"source":{"system":"sec-edgar","filing":"0001127602-24-021272","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":13,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760224021272/form4.xml","form_type":"4"}},{"id":1445620,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Director Stock Option (Right to Buy)","published_at":"2024-07-31T22:52:09.000Z","date":"2024-07-31","kind":"exercise","planned":false,"acquired":false,"shares":2958,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":0,"derivative":{"exercise_price":82.07,"exercise_date":"2024-01-01","expiration_date":"2027-02-04","underlying":"Common Stock","underlying_shares":2958},"source":{"system":"sec-edgar","filing":"0001127602-24-021272","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760224021272/form4.xml","form_type":"4"}},{"id":1445619,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Director Stock Option (Right to Buy)","published_at":"2024-07-31T22:52:09.000Z","date":"2024-07-31","kind":"exercise","planned":false,"acquired":false,"shares":2661,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":0,"derivative":{"exercise_price":86.78,"exercise_date":"2023-01-01","expiration_date":"2026-07-30","underlying":"Common Stock","underlying_shares":2661},"source":{"system":"sec-edgar","filing":"0001127602-24-021272","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760224021272/form4.xml","form_type":"4"}},{"id":1445618,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Director Stock Option (Right to Buy)","published_at":"2024-07-31T22:52:09.000Z","date":"2024-07-31","kind":"exercise","planned":false,"acquired":false,"shares":1787,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":0,"derivative":{"exercise_price":110.02,"exercise_date":"2023-01-01","expiration_date":"2026-02-05","underlying":"Common Stock","underlying_shares":1787},"source":{"system":"sec-edgar","filing":"0001127602-24-021272","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760224021272/form4.xml","form_type":"4"}},{"id":1445617,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Director Stock Option (Right to Buy)","published_at":"2024-07-31T22:52:09.000Z","date":"2024-07-31","kind":"exercise","planned":false,"acquired":false,"shares":1353,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":0,"derivative":{"exercise_price":160.01,"exercise_date":"2022-01-01","expiration_date":"2025-07-31","underlying":"Common Stock","underlying_shares":1353},"source":{"system":"sec-edgar","filing":"0001127602-24-021272","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760224021272/form4.xml","form_type":"4"}},{"id":1445616,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Deferred Stock Units","published_at":"2024-07-31T22:52:09.000Z","date":"2024-07-29","kind":"grant","planned":false,"acquired":true,"shares":372,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Reflects cash fees that the director has elected to defer under the Company's deferred compensation plan, which are notionally invested in a measurement fund tracking the Company's common stock during the deferral period.  Each deferred stock unit is equal to one share of the Company's common stock, and becomes distributable in common stock upon the reporting person's separation from service as a member of the Board of Directors of the Company."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Reflects cash fees that the director has elected to defer under the Company's deferred compensation plan, which are notionally invested in a measurement fund tracking the Company's common stock during the deferral period.  Each deferred stock unit is equal to one share of the Company's common stock, and becomes distributable in common stock upon the reporting person's separation from service as a member of the Board of Directors of the Company."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Reflects cash fees that the director has elected to defer under the Company's deferred compensation plan, which are notionally invested in a measurement fund tracking the Company's common stock during the deferral period.  Each deferred stock unit is equal to one share of the Company's common stock, and becomes distributable in common stock upon the reporting person's separation from service as a member of the Board of Directors of the Company."}],"balance_after":372,"derivative":{"underlying":"Common Stock","underlying_shares":372},"source":{"system":"sec-edgar","filing":"0001127602-24-021272","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760224021272/form4.xml","form_type":"4"}},{"id":1445615,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Restricted Stock Units","published_at":"2024-07-31T22:52:09.000Z","date":"2024-07-29","kind":"grant","planned":false,"acquired":true,"shares":544,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit represents a right to receive one share of the Company's common stock upon vesting. The restricted stock units vest in full on August 15, 2025."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Each restricted stock unit represents a right to receive one share of the Company's common stock upon vesting. The restricted stock units vest in full on August 15, 2025."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Each restricted stock unit represents a right to receive one share of the Company's common stock upon vesting. The restricted stock units vest in full on August 15, 2025."}],"balance_after":544,"derivative":{"underlying":"Common Stock","underlying_shares":544},"source":{"system":"sec-edgar","filing":"0001127602-24-021272","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760224021272/form4.xml","form_type":"4"}},{"id":1445614,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Common Stock","published_at":"2024-07-31T22:52:09.000Z","date":"2024-07-31","kind":"tax_withholding","planned":false,"acquired":false,"shares":5787,"price":185.62,"value":1074182.94,"ownership":{"direct":true},"balance_after":8913,"source":{"system":"sec-edgar","filing":"0001127602-24-021272","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760224021272/form4.xml","form_type":"4"}},{"id":1445613,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Common Stock","published_at":"2024-07-31T22:52:09.000Z","date":"2024-07-31","kind":"exercise","planned":false,"acquired":true,"shares":1679,"price":69.63,"value":116908.77,"ownership":{"direct":true},"balance_after":14700,"source":{"system":"sec-edgar","filing":"0001127602-24-021272","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760224021272/form4.xml","form_type":"4"}},{"id":1445612,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Common Stock","published_at":"2024-07-31T22:52:09.000Z","date":"2024-07-31","kind":"exercise","planned":false,"acquired":true,"shares":2958,"price":82.07,"value":242763.06,"ownership":{"direct":true},"balance_after":13021,"source":{"system":"sec-edgar","filing":"0001127602-24-021272","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760224021272/form4.xml","form_type":"4"}},{"id":1445611,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Common Stock","published_at":"2024-07-31T22:52:09.000Z","date":"2024-07-31","kind":"exercise","planned":false,"acquired":true,"shares":2661,"price":86.78,"value":230921.58,"ownership":{"direct":true},"balance_after":10063,"source":{"system":"sec-edgar","filing":"0001127602-24-021272","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760224021272/form4.xml","form_type":"4"}},{"id":1445610,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Common Stock","published_at":"2024-07-31T22:52:09.000Z","date":"2024-07-31","kind":"exercise","planned":false,"acquired":true,"shares":1787,"price":110.02,"value":196605.74,"ownership":{"direct":true},"balance_after":7402,"source":{"system":"sec-edgar","filing":"0001127602-24-021272","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760224021272/form4.xml","form_type":"4"}},{"id":1445609,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Common Stock","published_at":"2024-07-31T22:52:09.000Z","date":"2024-07-31","kind":"exercise","planned":false,"acquired":true,"shares":1353,"price":160.01,"value":216493.53,"ownership":{"direct":true},"balance_after":5615,"source":{"system":"sec-edgar","filing":"0001127602-24-021272","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760224021272/form4.xml","form_type":"4"}},{"id":1589945,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Stock Units","published_at":"2024-03-07T22:31:32.000Z","date":"2024-03-05","kind":"exercise","planned":false,"acquired":false,"shares":537,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2022-2027."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2022-2027."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2022-2027."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Inclusive of previously reported deferred stock units."}],"balance_after":5250,"derivative":{"underlying":"Common Stock","underlying_shares":537},"source":{"system":"sec-edgar","filing":"0001127602-24-009041","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760224009041/form4.xml","form_type":"4"}},{"id":1589944,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Common Stock","published_at":"2024-03-07T22:31:32.000Z","date":"2024-03-05","kind":"tax_withholding","planned":false,"acquired":false,"shares":41,"price":158.58,"value":6501.78,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Reflects the automatic surrender of shares of common stock to the Company to satisfy tax withholding obligations related to the settlement of the awards described above."}],"balance_after":4262,"source":{"system":"sec-edgar","filing":"0001127602-24-009041","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760224009041/form4.xml","form_type":"4"}},{"id":1589943,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Common Stock","published_at":"2024-03-07T22:31:32.000Z","date":"2024-03-05","kind":"exercise","planned":false,"acquired":true,"shares":537,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2022-2027."}],"balance_after":4303,"source":{"system":"sec-edgar","filing":"0001127602-24-009041","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760224009041/form4.xml","form_type":"4"}},{"id":1655782,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Restricted Stock Units","published_at":"2024-02-07T22:20:02.000Z","date":"2024-02-05","kind":"grant","planned":false,"acquired":true,"shares":638,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each restricted stock unit represents a right to receive one share of the Company's common stock upon vesting. The restricted stock units vest in full on March 5, 2025."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Each restricted stock unit represents a right to receive one share of the Company's common stock upon vesting. The restricted stock units vest in full on March 5, 2025."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Each restricted stock unit represents a right to receive one share of the Company's common stock upon vesting. The restricted stock units vest in full on March 5, 2025."}],"balance_after":638,"derivative":{"underlying":"Common Stock","underlying_shares":638},"source":{"system":"sec-edgar","filing":"0001127602-24-003750","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760224003750/form4.xml","form_type":"4"}},{"id":1655781,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Deferred Stock Units","published_at":"2024-02-07T22:20:02.000Z","date":"2024-02-05","kind":"grant","planned":false,"acquired":true,"shares":309,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Reflects cash fees that the director has elected to defer under the Company's deferred compensation plan, which are notionally invested in a measurement fund tracking the Company's common stock during the deferral period.  Each deferred stock unit is equal to one share of the Company's common stock, and becomes distributable in common stock upon the reporting person's separation from service as a member of the Board of Directors of the Company."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Reflects cash fees that the director has elected to defer under the Company's deferred compensation plan, which are notionally invested in a measurement fund tracking the Company's common stock during the deferral period.  Each deferred stock unit is equal to one share of the Company's common stock, and becomes distributable in common stock upon the reporting person's separation from service as a member of the Board of Directors of the Company."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Reflects cash fees that the director has elected to defer under the Company's deferred compensation plan, which are notionally invested in a measurement fund tracking the Company's common stock during the deferral period.  Each deferred stock unit is equal to one share of the Company's common stock, and becomes distributable in common stock upon the reporting person's separation from service as a member of the Board of Directors of the Company."}],"balance_after":309,"derivative":{"underlying":"Common Stock","underlying_shares":309},"source":{"system":"sec-edgar","filing":"0001127602-24-003750","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760224003750/form4.xml","form_type":"4"}},{"id":1694162,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Stock Units","published_at":"2024-01-03T22:23:31.000Z","date":"2024-01-01","kind":"exercise","planned":false,"acquired":false,"shares":122,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Reflects the vesting of a previously reported award. Award vests 2021-2024."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Reflects the vesting of a previously reported award. Award vests 2021-2024."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Reflects the vesting of a previously reported award. Award vests 2021-2024."}],"balance_after":4840,"derivative":{"underlying":"Common Stock","underlying_shares":122},"source":{"system":"sec-edgar","filing":"0001127602-24-000561","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760224000561/form4.xml","form_type":"4"}},{"id":1694161,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Common Stock","published_at":"2024-01-03T22:23:31.000Z","date":"2024-01-01","kind":"tax_withholding","planned":false,"acquired":false,"shares":9,"price":151.42,"value":1362.78,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Reflects the automatic surrender of shares of common stock to the Company to satisfy tax withholding obligations related to the vesting of the award described above."}],"balance_after":3766,"source":{"system":"sec-edgar","filing":"0001127602-24-000561","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760224000561/form4.xml","form_type":"4"}},{"id":1694160,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Common Stock","published_at":"2024-01-03T22:23:31.000Z","date":"2024-01-01","kind":"exercise","planned":false,"acquired":true,"shares":122,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Reflects the vesting of a previously reported award. Award vests 2021-2024."}],"balance_after":3775,"source":{"system":"sec-edgar","filing":"0001127602-24-000561","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760224000561/form4.xml","form_type":"4"}},{"id":1804410,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Stock Units","published_at":"2023-08-17T21:03:38.000Z","date":"2023-08-15","kind":"exercise","planned":false,"acquired":false,"shares":753,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2021-2026."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2021-2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2021-2026."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Inclusive of previously reported deferred stock units."}],"balance_after":4962,"derivative":{"underlying":"Common Stock","underlying_shares":753},"source":{"system":"sec-edgar","filing":"0001127602-23-022841","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760223022841/form4.xml","form_type":"4"}},{"id":1804409,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Common Stock","published_at":"2023-08-17T21:03:38.000Z","date":"2023-08-15","kind":"tax_withholding","planned":false,"acquired":false,"shares":58,"price":133.04,"value":7716.32,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Reflects the automatic surrender of shares of common stock to the Company to satisfy tax withholding obligations related to the vesting of the awards described above."}],"balance_after":3653,"source":{"system":"sec-edgar","filing":"0001127602-23-022841","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760223022841/form4.xml","form_type":"4"}},{"id":1804408,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Common Stock","published_at":"2023-08-17T21:03:38.000Z","date":"2023-08-15","kind":"exercise","planned":false,"acquired":true,"shares":753,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2021-2026."}],"balance_after":3711,"source":{"system":"sec-edgar","filing":"0001127602-23-022841","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760223022841/form4.xml","form_type":"4"}},{"id":1821681,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Deferred Stock Units","published_at":"2023-07-28T20:36:25.000Z","date":"2023-07-26","kind":"grant","planned":false,"acquired":true,"shares":342,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Reflects cash fees that the reporting person has elected to defer under the Company's deferred compensation plan, which are notionally invested in a measurement fund tracking the Company's common stock during the deferral period. Each deferred stock unit is equal to one share of the Company's common stock, and becomes payable in common stock upon the reporting person's separation from service as a member of the Board of Directors of the Company."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Reflects cash fees that the reporting person has elected to defer under the Company's deferred compensation plan, which are notionally invested in a measurement fund tracking the Company's common stock during the deferral period. Each deferred stock unit is equal to one share of the Company's common stock, and becomes payable in common stock upon the reporting person's separation from service as a member of the Board of Directors of the Company."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Reflects cash fees that the reporting person has elected to defer under the Company's deferred compensation plan, which are notionally invested in a measurement fund tracking the Company's common stock during the deferral period. Each deferred stock unit is equal to one share of the Company's common stock, and becomes payable in common stock upon the reporting person's separation from service as a member of the Board of Directors of the Company."}],"balance_after":342,"derivative":{"underlying":"Common Stock","underlying_shares":342},"source":{"system":"sec-edgar","filing":"0001127602-23-021522","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760223021522/form4.xml","form_type":"4"}},{"id":1821680,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Restricted Stock Units","published_at":"2023-07-28T20:36:25.000Z","date":"2023-07-26","kind":"grant","planned":false,"acquired":true,"shares":707,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit represents a right to receive one share of the Company's common stock upon vesting. The restricted stock units vest in 25% increments on each of August 15, 2024, 2025, 2026 and 2027."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Each restricted stock unit represents a right to receive one share of the Company's common stock upon vesting. The restricted stock units vest in 25% increments on each of August 15, 2024, 2025, 2026 and 2027."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Each restricted stock unit represents a right to receive one share of the Company's common stock upon vesting. The restricted stock units vest in 25% increments on each of August 15, 2024, 2025, 2026 and 2027."}],"balance_after":707,"derivative":{"underlying":"Common Stock","underlying_shares":707},"source":{"system":"sec-edgar","filing":"0001127602-23-021522","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760223021522/form4.xml","form_type":"4"}},{"id":1966938,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Stock Units","published_at":"2023-03-07T22:35:54.000Z","date":"2023-03-05","kind":"exercise","acquired":false,"shares":392,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2022-2026."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2022-2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2022-2026."}],"balance_after":4666,"derivative":{"underlying":"Common Stock","underlying_shares":392},"source":{"system":"sec-edgar","filing":"0001127602-23-009329","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760223009329/form4.xml","form_type":"4"}},{"id":1966937,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Common Stock","published_at":"2023-03-07T22:35:54.000Z","date":"2023-03-05","kind":"tax_withholding","acquired":false,"shares":30,"price":160.76,"value":4822.8,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Reflects the automatic surrender of shares of common stock to the Company to satisfy tax withholding obligations related to the vesting of the awards described above."}],"balance_after":2958,"source":{"system":"sec-edgar","filing":"0001127602-23-009329","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760223009329/form4.xml","form_type":"4"}},{"id":1966936,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Common Stock","published_at":"2023-03-07T22:35:54.000Z","date":"2023-03-05","kind":"exercise","acquired":true,"shares":392,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2022-2026."}],"balance_after":2988,"source":{"system":"sec-edgar","filing":"0001127602-23-009329","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760223009329/form4.xml","form_type":"4"}},{"id":2026955,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Deferred Stock Units","published_at":"2023-02-08T22:00:54.000Z","date":"2023-02-06","kind":"grant","acquired":true,"shares":284,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Reflects cash fees that the director has elected to defer under the Company's deferred compensation plan, which are notionally invested in a measurement fund tracking the Company's common stock during the deferral period.  Each deferred stock unit is equal to one share of the Company's common stock, and becomes payable in common stock upon the reporting person's separation from service as a member of the Board of Directors of the Company."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Reflects cash fees that the director has elected to defer under the Company's deferred compensation plan, which are notionally invested in a measurement fund tracking the Company's common stock during the deferral period.  Each deferred stock unit is equal to one share of the Company's common stock, and becomes payable in common stock upon the reporting person's separation from service as a member of the Board of Directors of the Company."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Reflects cash fees that the director has elected to defer under the Company's deferred compensation plan, which are notionally invested in a measurement fund tracking the Company's common stock during the deferral period.  Each deferred stock unit is equal to one share of the Company's common stock, and becomes payable in common stock upon the reporting person's separation from service as a member of the Board of Directors of the Company."}],"balance_after":284,"derivative":{"underlying":"Common Stock","underlying_shares":284},"source":{"system":"sec-edgar","filing":"0001127602-23-004026","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760223004026/form4.xml","form_type":"4"}},{"id":2026954,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Restricted Stock Units","published_at":"2023-02-08T22:00:54.000Z","date":"2023-02-06","kind":"grant","acquired":true,"shares":587,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each stock unit represents a right to receive one share of the Company's common stock upon vesting. The stock units vest in 25% increments on each of March 5, 2024, 2025, 2026 and 2027."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Each stock unit represents a right to receive one share of the Company's common stock upon vesting. The stock units vest in 25% increments on each of March 5, 2024, 2025, 2026 and 2027."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Each stock unit represents a right to receive one share of the Company's common stock upon vesting. The stock units vest in 25% increments on each of March 5, 2024, 2025, 2026 and 2027."}],"balance_after":587,"derivative":{"underlying":"Common Stock","underlying_shares":587},"source":{"system":"sec-edgar","filing":"0001127602-23-004026","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760223004026/form4.xml","form_type":"4"}},{"id":2069737,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Stock Units","published_at":"2023-01-04T22:32:39.000Z","date":"2023-01-01","kind":"exercise","acquired":false,"shares":329,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2020-2024."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2020-2024."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2020-2024."}],"balance_after":4187,"derivative":{"underlying":"Common Stock","underlying_shares":329},"source":{"system":"sec-edgar","filing":"0001127602-23-000613","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760223000613/form4.xml","form_type":"4"}},{"id":2069736,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Common Stock","published_at":"2023-01-04T22:32:39.000Z","date":"2023-01-01","kind":"tax_withholding","acquired":false,"shares":25,"price":158.43,"value":3960.75,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"Reflects the automatic surrender of shares of common stock to the Company to satisfy tax withholding obligations related to the vesting of the awards described above."}],"balance_after":2596,"source":{"system":"sec-edgar","filing":"0001127602-23-000613","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760223000613/form4.xml","form_type":"4"}},{"id":2069735,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Common Stock","published_at":"2023-01-04T22:32:39.000Z","date":"2023-01-01","kind":"exercise","acquired":true,"shares":329,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2020-2024."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Balance includes two shares of common stock acquired as a result of dividend accruals on previously vested restricted stock unit awards."}],"balance_after":2621,"source":{"system":"sec-edgar","filing":"0001127602-23-000613","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760223000613/form4.xml","form_type":"4"}},{"id":2182591,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Stock Units","published_at":"2022-08-17T21:06:34.000Z","date":"2022-08-15","kind":"exercise","acquired":false,"shares":559,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2021-2025."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2021-2025."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2021-2025."}],"balance_after":4516,"derivative":{"underlying":"Common Stock","underlying_shares":559},"source":{"system":"sec-edgar","filing":"0001127602-22-021222","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760222021222/form4.xml","form_type":"4"}},{"id":2182590,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Common Stock","published_at":"2022-08-17T21:06:34.000Z","date":"2022-08-15","kind":"tax_withholding","acquired":false,"shares":43,"price":139.84,"value":6013.12,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Reflects the automatic surrender of shares of common stock to the Company to satisfy tax withholding obligations related to the vesting of the awards described above."}],"balance_after":2290,"source":{"system":"sec-edgar","filing":"0001127602-22-021222","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760222021222/form4.xml","form_type":"4"}},{"id":2182589,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Common Stock","published_at":"2022-08-17T21:06:34.000Z","date":"2022-08-15","kind":"exercise","acquired":true,"shares":559,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2021-2025."}],"balance_after":2333,"source":{"system":"sec-edgar","filing":"0001127602-22-021222","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760222021222/form4.xml","form_type":"4"}},{"id":2196439,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Deferred Stock Units","published_at":"2022-08-03T20:58:53.000Z","date":"2022-08-01","kind":"grant","acquired":true,"shares":374,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Reflects cash fees that the director has elected to defer under the Company's deferred compensation plan, which are notionally invested in a measurement fund tracking the Company's common stock during the deferral period.  Each deferred stock unit is equal to one share of the Company's common stock, and becomes payable in common stock upon the reporting person's separation from service as a member of the Board of Directors of the Company."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Reflects cash fees that the director has elected to defer under the Company's deferred compensation plan, which are notionally invested in a measurement fund tracking the Company's common stock during the deferral period.  Each deferred stock unit is equal to one share of the Company's common stock, and becomes payable in common stock upon the reporting person's separation from service as a member of the Board of Directors of the Company."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Reflects cash fees that the director has elected to defer under the Company's deferred compensation plan, which are notionally invested in a measurement fund tracking the Company's common stock during the deferral period.  Each deferred stock unit is equal to one share of the Company's common stock, and becomes payable in common stock upon the reporting person's separation from service as a member of the Board of Directors of the Company."}],"balance_after":374,"derivative":{"underlying":"Common Stock","underlying_shares":374},"source":{"system":"sec-edgar","filing":"0001127602-22-020394","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760222020394/form4.xml","form_type":"4"}},{"id":2196438,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Restricted Stock Units","published_at":"2022-08-03T20:58:53.000Z","date":"2022-08-01","kind":"grant","acquired":true,"shares":773,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit represents a right to receive one share of the Company's common stock upon vesting. The restricted stock units vest in 25% increments on each of August 15, 2023, 2024, 2025 and 2026."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Each restricted stock unit represents a right to receive one share of the Company's common stock upon vesting. The restricted stock units vest in 25% increments on each of August 15, 2023, 2024, 2025 and 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Each restricted stock unit represents a right to receive one share of the Company's common stock upon vesting. The restricted stock units vest in 25% increments on each of August 15, 2023, 2024, 2025 and 2026."}],"balance_after":773,"derivative":{"underlying":"Common Stock","underlying_shares":773},"source":{"system":"sec-edgar","filing":"0001127602-22-020394","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760222020394/form4.xml","form_type":"4"}},{"id":2345441,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Stock Units","published_at":"2022-03-08T22:58:16.000Z","date":"2022-03-05","kind":"exercise","acquired":false,"shares":220,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Reflects the vesting of a previously reported award. Award vests 2022-2025."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Reflects the vesting of a previously reported award. Award vests 2022-2025."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Reflects the vesting of a previously reported award. Award vests 2022-2025."}],"balance_after":3928,"derivative":{"underlying":"Common Stock","underlying_shares":220},"source":{"system":"sec-edgar","filing":"0001127602-22-008656","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760222008656/form4.xml","form_type":"4"}},{"id":2345440,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Common Stock","published_at":"2022-03-08T22:58:16.000Z","date":"2022-03-05","kind":"tax_withholding","acquired":false,"shares":17,"price":129.17,"value":2195.89,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Reflects the automatic surrender of shares of common stock to the Company to satisfy tax withholding obligations related to the vesting of the award described above."}],"balance_after":1774,"source":{"system":"sec-edgar","filing":"0001127602-22-008656","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760222008656/form4.xml","form_type":"4"}},{"id":2345439,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Common Stock","published_at":"2022-03-08T22:58:16.000Z","date":"2022-03-05","kind":"exercise","acquired":true,"shares":220,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Reflects the vesting of a previously reported award. Award vests 2022-2025."}],"balance_after":1791,"source":{"system":"sec-edgar","filing":"0001127602-22-008656","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760222008656/form4.xml","form_type":"4"}},{"id":2406922,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Deferred Stock Units","published_at":"2022-02-09T13:39:18.000Z","date":"2022-02-07","kind":"grant","acquired":true,"shares":273,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Reflects cash fees that the director has elected to defer under the Company's deferred compensation plan, which are notionally invested in a measurement fund tracking the Company's common stock during the deferral period.  Each deferred stock unit is equal to one share of the Company's common stock, and becomes payable in common stock upon the reporting person's separation from service as a member of the Board of Directors of the Company."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Reflects cash fees that the director has elected to defer under the Company's deferred compensation plan, which are notionally invested in a measurement fund tracking the Company's common stock during the deferral period.  Each deferred stock unit is equal to one share of the Company's common stock, and becomes payable in common stock upon the reporting person's separation from service as a member of the Board of Directors of the Company."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Reflects cash fees that the director has elected to defer under the Company's deferred compensation plan, which are notionally invested in a measurement fund tracking the Company's common stock during the deferral period.  Each deferred stock unit is equal to one share of the Company's common stock, and becomes payable in common stock upon the reporting person's separation from service as a member of the Board of Directors of the Company."}],"balance_after":273,"derivative":{"underlying":"Common Stock","underlying_shares":273},"source":{"system":"sec-edgar","filing":"0001127602-22-003876","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760222003876/form4.xml","form_type":"4"}},{"id":2406921,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Restricted Stock Units","published_at":"2022-02-09T13:39:18.000Z","date":"2022-02-07","kind":"grant","acquired":true,"shares":685,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit represents a right to receive one share of the Company's common stock upon vesting. The restricted stock units vest in 25% increments on each of March 5, 2023, 2024, 2025 and 2026."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Each restricted stock unit represents a right to receive one share of the Company's common stock upon vesting. The restricted stock units vest in 25% increments on each of March 5, 2023, 2024, 2025 and 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Each restricted stock unit represents a right to receive one share of the Company's common stock upon vesting. The restricted stock units vest in 25% increments on each of March 5, 2023, 2024, 2025 and 2026."}],"balance_after":685,"derivative":{"underlying":"Common Stock","underlying_shares":685},"source":{"system":"sec-edgar","filing":"0001127602-22-003876","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760222003876/form4.xml","form_type":"4"}},{"id":2451157,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Stock Units","published_at":"2022-01-04T22:16:35.000Z","date":"2022-01-01","kind":"exercise","acquired":false,"shares":441,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2019-2024."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2019-2024."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2019-2024."}],"balance_after":3190,"derivative":{"underlying":"Common Stock","underlying_shares":441},"source":{"system":"sec-edgar","filing":"0001127602-22-000573","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760222000573/form4.xml","form_type":"4"}},{"id":2451156,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Common Stock","published_at":"2022-01-04T22:16:35.000Z","date":"2022-01-01","kind":"tax_withholding","acquired":false,"shares":34,"price":164.51,"value":5593.34,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"Reflects the automatic surrender of shares of common stock to the Company to satisfy tax withholding obligations related to the vesting of the awards described above."}],"balance_after":1571,"source":{"system":"sec-edgar","filing":"0001127602-22-000573","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760222000573/form4.xml","form_type":"4"}},{"id":2451155,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Common Stock","published_at":"2022-01-04T22:16:35.000Z","date":"2022-01-01","kind":"exercise","acquired":true,"shares":441,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2019-2024."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Balance includes four shares of common stock acquired as a result of dividend accruals on previously vested restricted stock unit awards."}],"balance_after":1605,"source":{"system":"sec-edgar","filing":"0001127602-22-000573","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760222000573/form4.xml","form_type":"4"}},{"id":2601081,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Stock Units","published_at":"2021-08-17T21:08:19.000Z","date":"2021-08-15","kind":"exercise","acquired":false,"shares":382,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Reflects the vesting of a portion of a previously reported restricted stock unit award. The award vests in four equal parts on August 15, 2021-2024."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Reflects the vesting of a portion of a previously reported restricted stock unit award. The award vests in four equal parts on August 15, 2021-2024."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Reflects the vesting of a portion of a previously reported restricted stock unit award. The award vests in four equal parts on August 15, 2021-2024."}],"balance_after":1149,"derivative":{"underlying":"Common Stock","underlying_shares":382},"source":{"system":"sec-edgar","filing":"0001127602-21-023898","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760221023898/form4.xml","form_type":"4"}},{"id":2601080,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Common Stock","published_at":"2021-08-17T21:08:19.000Z","date":"2021-08-15","kind":"tax_withholding","acquired":false,"shares":29,"price":169.2,"value":4906.8,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Reflects the automatic surrender of shares of common stock to the Company to satisfy tax withholding obligations related to the vesting of the award described above."}],"balance_after":1160,"source":{"system":"sec-edgar","filing":"0001127602-21-023898","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760221023898/form4.xml","form_type":"4"}},{"id":2601079,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Common Stock","published_at":"2021-08-17T21:08:19.000Z","date":"2021-08-15","kind":"exercise","acquired":true,"shares":382,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Reflects the vesting of a portion of a previously reported restricted stock unit award. The award vests in four equal parts on August 15, 2021-2024."}],"balance_after":1189,"source":{"system":"sec-edgar","filing":"0001127602-21-023898","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760221023898/form4.xml","form_type":"4"}},{"id":2622475,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Director Stock Option (Right to Buy)","published_at":"2021-07-29T21:06:22.000Z","date":"2021-07-28","kind":"grant","acquired":true,"shares":559,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"This option is exercisable in 25% increments on each of August 15, 2022, 2023, 2024 and 2025."}],"balance_after":559,"derivative":{"exercise_price":155.83,"expiration_date":"2028-07-28","underlying":"Common Stock","underlying_shares":559},"source":{"system":"sec-edgar","filing":"0001127602-21-022607","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760221022607/form4.xml","form_type":"4"}},{"id":2622474,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Stock Units","published_at":"2021-07-29T21:06:22.000Z","date":"2021-07-28","kind":"grant","acquired":true,"shares":707,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each stock unit represents a right to receive one share of the Company's common stock upon vesting.  The stock units vest in 25% increments on each of August 15, 2022, 2023, 2024 and 2025."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Each stock unit represents a right to receive one share of the Company's common stock upon vesting.  The stock units vest in 25% increments on each of August 15, 2022, 2023, 2024 and 2025."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Each stock unit represents a right to receive one share of the Company's common stock upon vesting.  The stock units vest in 25% increments on each of August 15, 2022, 2023, 2024 and 2025."}],"balance_after":707,"derivative":{"underlying":"Common Stock","underlying_shares":707},"source":{"system":"sec-edgar","filing":"0001127602-21-022607","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760221022607/form4.xml","form_type":"4"}},{"id":2872823,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Stock Units","published_at":"2021-02-09T21:46:23.000Z","date":"2021-02-08","kind":"grant","acquired":true,"shares":883,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each stock unit represents a right to receive one share of the Company's common stock upon vesting. The stock units vest in 25% increments on each of March 5, 2022, 2023, 2024 and 2025."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Each stock unit represents a right to receive one share of the Company's common stock upon vesting. The stock units vest in 25% increments on each of March 5, 2022, 2023, 2024 and 2025."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Each stock unit represents a right to receive one share of the Company's common stock upon vesting. The stock units vest in 25% increments on each of March 5, 2022, 2023, 2024 and 2025."}],"balance_after":883,"derivative":{"underlying":"Common Stock","underlying_shares":883},"source":{"system":"sec-edgar","filing":"0001127602-21-004724","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760221004724/form4.xml","form_type":"4"}},{"id":2872822,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Alvingham Karen L.","relationship":{"director":true}}],"security":"Director Stock Option (Right to Buy)","published_at":"2021-02-09T21:46:23.000Z","date":"2021-02-08","kind":"grant","acquired":true,"shares":636,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"This option is exercisable in 25% increments on each of March 5, 2022, 2023, 2024 and 2025."}],"balance_after":636,"derivative":{"exercise_price":132.1,"expiration_date":"2028-02-08","underlying":"Common Stock","underlying_shares":636},"source":{"system":"sec-edgar","filing":"0001127602-21-004724","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760221004724/form4.xml","form_type":"4"}},{"id":2922513,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Yerburgh Karen","relationship":{"director":true}}],"security":"Stock Units","published_at":"2021-01-05T22:04:26.000Z","date":"2021-01-01","kind":"exercise","acquired":false,"shares":439,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2018-2024."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2018-2024."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2018-2024."}],"balance_after":2423,"derivative":{"underlying":"Common Stock","underlying_shares":439},"source":{"system":"sec-edgar","filing":"0001127602-21-000687","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760221000687/form4.xml","form_type":"4"}},{"id":2922512,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Yerburgh Karen","relationship":{"director":true}}],"security":"Common Stock","published_at":"2021-01-05T22:04:26.000Z","date":"2021-01-01","kind":"tax_withholding","acquired":false,"shares":34,"price":101.7,"value":3457.8,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Reflects the automatic surrender of shares of common stock to the Company to satisfy tax withholding obligations related to the vesting of previously reported awards."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Balance includes four shares of common stock acquired as a result of dividend accruals on previously vested restricted stock unit awards."}],"balance_after":807,"source":{"system":"sec-edgar","filing":"0001127602-21-000687","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760221000687/form4.xml","form_type":"4"}},{"id":2922511,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Yerburgh Karen","relationship":{"director":true}}],"security":"Common Stock","published_at":"2021-01-05T22:04:26.000Z","date":"2021-01-01","kind":"exercise","acquired":true,"shares":439,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Reflects the vesting of previously reported awards. Awards vest 2018-2024."}],"balance_after":837,"source":{"system":"sec-edgar","filing":"0001127602-21-000687","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760221000687/form4.xml","form_type":"4"}},{"id":3073623,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Yerburgh Karen","relationship":{"director":true}}],"security":"Stock Units","published_at":"2020-07-30T23:45:20.000Z","date":"2020-07-28","kind":"grant","acquired":true,"shares":1531,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each stock unit represents a right to receive one share of the Company's common stock upon vesting.  The stock units vest in 25% increments on each of August 15, 2021, 2022, 2023 and 2024."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Each stock unit represents a right to receive one share of the Company's common stock upon vesting.  The stock units vest in 25% increments on each of August 15, 2021, 2022, 2023 and 2024."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Each stock unit represents a right to receive one share of the Company's common stock upon vesting.  The stock units vest in 25% increments on each of August 15, 2021, 2022, 2023 and 2024."}],"balance_after":1531,"derivative":{"underlying":"Common Stock","underlying_shares":1531},"source":{"system":"sec-edgar","filing":"0001127602-20-022329","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760220022329/form4.xml","form_type":"4"}},{"id":3073622,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Yerburgh Karen","relationship":{"director":true}}],"security":"Director Stock Option (Right to Buy)","published_at":"2020-07-30T23:45:20.000Z","date":"2020-07-28","kind":"grant","acquired":true,"shares":2239,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"This option is exercisable in 25% increments on each of August 15, 2021, 2022, 2023 and 2024."}],"balance_after":2239,"derivative":{"exercise_price":69.63,"expiration_date":"2027-07-28","underlying":"Common Stock","underlying_shares":2239},"source":{"system":"sec-edgar","filing":"0001127602-20-022329","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760220022329/form4.xml","form_type":"4"}},{"id":3287075,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Yerburgh Karen","relationship":{"director":true}}],"security":"Stock Units","published_at":"2020-02-06T22:37:54.000Z","date":"2020-02-04","kind":"grant","acquired":true,"shares":488,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each stock unit represents a right to receive one share of the Company's common stock upon vesting.  The stock units vest in 25% increments on each of January 1, 2021, 2022, 2023 and 2024."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Each stock unit represents a right to receive one share of the Company's common stock upon vesting.  The stock units vest in 25% increments on each of January 1, 2021, 2022, 2023 and 2024."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Each stock unit represents a right to receive one share of the Company's common stock upon vesting.  The stock units vest in 25% increments on each of January 1, 2021, 2022, 2023 and 2024."}],"balance_after":488,"derivative":{"underlying":"Common Stock","underlying_shares":488},"source":{"system":"sec-edgar","filing":"0001127602-20-004076","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760220004076/form4.xml","form_type":"4"}},{"id":3287074,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Yerburgh Karen","relationship":{"director":true}}],"security":"Director Stock Option (Right to Buy)","published_at":"2020-02-06T22:37:54.000Z","date":"2020-02-04","kind":"grant","acquired":true,"shares":2958,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"This option is exercisable in 25% increments on each of January 1, 2021, 2022, 2023 and 2024."}],"balance_after":2958,"derivative":{"exercise_price":82.07,"expiration_date":"2027-02-04","underlying":"Common Stock","underlying_shares":2958},"source":{"system":"sec-edgar","filing":"0001127602-20-004076","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760220004076/form4.xml","form_type":"4"}},{"id":3324436,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Yerburgh Karen","relationship":{"director":true}}],"security":"Common Stock","published_at":"2020-01-03T23:26:26.000Z","date":"2020-01-01","kind":"tax_withholding","acquired":false,"shares":25,"price":84.74,"value":2118.5,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Reflects the automatic surrender of shares of common stock to the Company to satisfy tax withholding obligations related to the vesting of previously reported awards."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes three shares of common stock acquired as a result of dividend accruals on previously vested restricted stock unit awards."}],"balance_after":398,"source":{"system":"sec-edgar","filing":"0001127602-20-000894","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760220000894/form4.xml","form_type":"4"}},{"id":3451241,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Yerburgh Karen","relationship":{"director":true}}],"security":"Stock Units","published_at":"2019-08-01T21:39:15.000Z","date":"2019-07-30","kind":"grant","acquired":true,"shares":461,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each stock unit represents a right to receive one share of the Company's common stock upon vesting.  The stock units vest in 25% increments on each of January 1, 2020, 2021, 2022 and 2023."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Each stock unit represents a right to receive one share of the Company's common stock upon vesting.  The stock units vest in 25% increments on each of January 1, 2020, 2021, 2022 and 2023."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Each stock unit represents a right to receive one share of the Company's common stock upon vesting.  The stock units vest in 25% increments on each of January 1, 2020, 2021, 2022 and 2023."}],"balance_after":461,"derivative":{"underlying":"Common Stock","underlying_shares":461},"source":{"system":"sec-edgar","filing":"0001127602-19-025698","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760219025698/form4.xml","form_type":"4"}},{"id":3451240,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Yerburgh Karen","relationship":{"director":true}}],"security":"Director Stock Option (Right to Buy)","published_at":"2019-08-01T21:39:15.000Z","date":"2019-07-30","kind":"grant","acquired":true,"shares":2661,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"This option is exercisable in 25% increments on each of January 1, 2020, 2021, 2022 and 2023."}],"balance_after":2661,"derivative":{"exercise_price":86.78,"expiration_date":"2026-07-30","underlying":"Common Stock","underlying_shares":2661},"source":{"system":"sec-edgar","filing":"0001127602-19-025698","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000112760219025698/form4.xml","form_type":"4"}},{"id":3670911,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Yerburgh Karen","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Units","published_at":"2019-02-07T22:47:18.000Z","date":"2019-02-05","kind":"grant","acquired":true,"shares":364,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F2","text":"Each stock unit represents a right to receive one share of the Company's common stock or, at the election of the plan administrator, cash with an equivalent value, upon vesting.  The stock units vest in 25% increments on each of January 1, 2020, 2021, 2022 and 2023."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each stock unit represents a right to receive one share of the Company's common stock or, at the election of the plan administrator, cash with an equivalent value, upon vesting.  The stock units vest in 25% increments on each of January 1, 2020, 2021, 2022 and 2023."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Each stock unit represents a right to receive one share of the Company's common stock or, at the election of the plan administrator, cash with an equivalent value, upon vesting.  The stock units vest in 25% increments on each of January 1, 2020, 2021, 2022 and 2023."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Each stock unit represents a right to receive one share of the Company's common stock or, at the election of the plan administrator, cash with an equivalent value, upon vesting.  The stock units vest in 25% increments on each of January 1, 2020, 2021, 2022 and 2023."}],"balance_after":364,"derivative":{"underlying":"Common Stock","underlying_shares":364},"source":{"system":"sec-edgar","filing":"0001179110-19-001566","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000117911019001566/edgar.xml","form_type":"4"}},{"id":3670910,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Yerburgh Karen","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Director Stock Option (Right to Buy)","published_at":"2019-02-07T22:47:18.000Z","date":"2019-02-05","kind":"grant","acquired":true,"shares":1787,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"This option is exercisable in 25% increments on each of January 1, 2020, 2021, 2022 and 2023."}],"balance_after":1787,"derivative":{"exercise_price":110.02,"expiration_date":"2026-02-05","underlying":"Common Stock","underlying_shares":1787},"source":{"system":"sec-edgar","filing":"0001179110-19-001566","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000117911019001566/edgar.xml","form_type":"4"}},{"id":3710263,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Yerburgh Karen","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2019-01-03T23:15:47.000Z","date":"2019-01-01","kind":"tax_withholding","acquired":false,"shares":9,"price":97.44,"value":876.96,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Reflects the automatic surrender of shares of common stock to the Company to satisfy tax withholding obligations related to the vesting of certain previously reported awards."}],"balance_after":102,"source":{"system":"sec-edgar","filing":"0001179110-19-000317","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000117911019000317/edgar.xml","form_type":"4"}},{"id":3855520,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Yerburgh Karen","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Units","published_at":"2018-08-02T21:18:36.000Z","date":"2018-07-31","kind":"grant","acquired":true,"shares":250,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F2","text":"Each stock unit represents a right to receive one share of the Company's common stock or, at the election of the plan administrator, cash with an equivalent value, upon vesting.  The stock units vest in 25% increments on each of January 1, 2019, 2020, 2021 and 2022."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each stock unit represents a right to receive one share of the Company's common stock or, at the election of the plan administrator, cash with an equivalent value, upon vesting.  The stock units vest in 25% increments on each of January 1, 2019, 2020, 2021 and 2022."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Each stock unit represents a right to receive one share of the Company's common stock or, at the election of the plan administrator, cash with an equivalent value, upon vesting.  The stock units vest in 25% increments on each of January 1, 2019, 2020, 2021 and 2022."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Each stock unit represents a right to receive one share of the Company's common stock or, at the election of the plan administrator, cash with an equivalent value, upon vesting.  The stock units vest in 25% increments on each of January 1, 2019, 2020, 2021 and 2022."}],"balance_after":250,"derivative":{"underlying":"Common Stock","underlying_shares":250},"source":{"system":"sec-edgar","filing":"0001179110-18-010169","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000117911018010169/edgar.xml","form_type":"4"}},{"id":3855519,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Yerburgh Karen","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Director Stock Option (Right to Buy)","published_at":"2018-08-02T21:18:36.000Z","date":"2018-07-31","kind":"grant","acquired":true,"shares":1353,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"This option is exercisable in 25% increments on each of January 1, 2019, 2020, 2021 and 2022."}],"balance_after":1353,"derivative":{"exercise_price":160.01,"expiration_date":"2025-07-31","underlying":"Common Stock","underlying_shares":1353},"source":{"system":"sec-edgar","filing":"0001179110-18-010169","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000117911018010169/edgar.xml","form_type":"4"}},{"id":4082388,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Yerburgh Karen","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Units","published_at":"2018-02-01T23:42:13.000Z","date":"2018-01-30","kind":"grant","acquired":true,"shares":197,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F2","text":"Each stock unit represents a right to receive one share of the Company's common stock or, at the election of the plan administrator, cash with an equivalent value, upon vesting. The stock units vest in 25% increments on each of January 1, 2019, 2020, 2021 and 2022."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each stock unit represents a right to receive one share of the Company's common stock or, at the election of the plan administrator, cash with an equivalent value, upon vesting. The stock units vest in 25% increments on each of January 1, 2019, 2020, 2021 and 2022."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Each stock unit represents a right to receive one share of the Company's common stock or, at the election of the plan administrator, cash with an equivalent value, upon vesting. The stock units vest in 25% increments on each of January 1, 2019, 2020, 2021 and 2022."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Each stock unit represents a right to receive one share of the Company's common stock or, at the election of the plan administrator, cash with an equivalent value, upon vesting. The stock units vest in 25% increments on each of January 1, 2019, 2020, 2021 and 2022."}],"balance_after":197,"derivative":{"underlying":"Common Stock","underlying_shares":197},"source":{"system":"sec-edgar","filing":"0001179110-18-001379","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000117911018001379/edgar.xml","form_type":"4"}},{"id":4082387,"issuer":{"id":3556,"kind":"organization","name":"AFFILIATED MANAGERS GROUP, INC.","symbol":"AMG"},"owners":[{"id":62123,"kind":"person","name":"Alvingham Karen L.","position":1,"cik":"0001726148","reported_name":"Yerburgh Karen","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Director Stock Option (Right to Buy)","published_at":"2018-02-01T23:42:13.000Z","date":"2018-01-30","kind":"grant","acquired":true,"shares":1116,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"This option vests in 25% increments on each of January 1, 2019, 2020, 2021 and 2022, and each increment is exercisable on or after such date, as applicable."}],"balance_after":1116,"derivative":{"exercise_price":203.22,"expiration_date":"2025-01-30","underlying":"Common Stock","underlying_shares":1116},"source":{"system":"sec-edgar","filing":"0001179110-18-001379","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1004434/000117911018001379/edgar.xml","form_type":"4"}}]}