{"transactions":[{"id":3330280,"issuer":{"id":3183,"kind":"organization","name":"BERKLEY W R CORP"},"owners":[{"id":152851,"kind":"person","name":"LEDERMAN IRA S","position":1,"cik":"0001225185","reported_name":"LEDERMAN IRA S","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & Secretary"}}],"security":"Common Stock","published_at":"2019-12-30T21:17:35.000Z","date":"2019-12-11","kind":"gift","acquired":false,"shares":600,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By The Ira S. Lederman Living Trust"},"balance_after":240031,"source":{"system":"sec-edgar","filing":"0000011544-19-000133","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/11544/000001154419000133/edgar.xml","form_type":"4"}},{"id":3332093,"issuer":{"id":3183,"kind":"organization","name":"BERKLEY W R CORP"},"owners":[{"id":152851,"kind":"person","name":"LEDERMAN IRA S","position":1,"cik":"0001225185","reported_name":"LEDERMAN IRA S","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & Secretary"}}],"security":"Common Stock","published_at":"2019-12-26T16:21:49.000Z","date":"2019-12-20","kind":"grant","acquired":true,"shares":98529,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By The Ira S. Lederman Living Trust"},"balance_after":240631,"source":{"system":"sec-edgar","filing":"0000011544-19-000131","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/11544/000001154419000131/edgar.xml","form_type":"4"}},{"id":3332092,"issuer":{"id":3183,"kind":"organization","name":"BERKLEY W R CORP"},"owners":[{"id":152851,"kind":"person","name":"LEDERMAN IRA S","position":1,"cik":"0001225185","reported_name":"LEDERMAN IRA S","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & Secretary"}}],"security":"Common Stock","published_at":"2019-12-26T16:21:49.000Z","date":"2019-12-20","kind":"gift","acquired":false,"shares":98529,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By The Carol J. Lederman Living Trust"},"balance_after":0,"source":{"system":"sec-edgar","filing":"0000011544-19-000131","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/11544/000001154419000131/edgar.xml","form_type":"4"}},{"id":3445314,"issuer":{"id":3183,"kind":"organization","name":"BERKLEY W R CORP"},"owners":[{"id":152851,"kind":"person","name":"LEDERMAN IRA S","position":1,"cik":"0001225185","reported_name":"LEDERMAN IRA S","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & Secretary"}}],"security":"Common Stock","published_at":"2019-08-08T01:48:38.000Z","date":"2019-08-05","kind":"tax_withholding","acquired":false,"shares":1118,"price":68.565,"value":76655.67,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"Represents payment of tax liability by withholding securities incident to the vesting of RSUs."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Represents shares of common stock underlying RSUs, all of which have vested (the receipt of which has been deferred), and does not include unvested shares of common stock underlying performance-based RSUs."}],"balance_after":251801,"source":{"system":"sec-edgar","filing":"0000011544-19-000094","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/11544/000001154419000094/edgar.xml","form_type":"4"}},{"id":3445313,"issuer":{"id":3183,"kind":"organization","name":"BERKLEY W R CORP"},"owners":[{"id":152851,"kind":"person","name":"LEDERMAN IRA S","position":1,"cik":"0001225185","reported_name":"LEDERMAN IRA S","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & Secretary"}}],"security":"Common Stock","published_at":"2019-08-08T01:48:38.000Z","date":"2019-08-05","kind":"grant","acquired":true,"shares":25345,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents the vesting of tranches of performance-based restricted stock units (\"RSUs\") granted in 2014, 2015 and 2016 under the W. R. Berkley Corporation 2018 Stock Incentive Plan (or its predecessor plan) for the: (i) five-year performance period ending June 30, 2019 for RSUs granted in 2014 (16,500 shares); (ii) four-year performance period ending June 30, 2019 for RSUs granted in 2015 (4,386 shares); and (iii) three-year performance period ending June 30, 2019 for RSUs granted in 2016 (4,459 shares)."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"On April 2, 2019, the Company's common stock split on a 3-for-2 basis (the \"Stock Split\"), resulting in an increase of 75,859 shares of common stock underlying vested RSUs beneficially owned by the Reporting Person."}],"balance_after":252919,"source":{"system":"sec-edgar","filing":"0000011544-19-000094","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/11544/000001154419000094/edgar.xml","form_type":"4"}},{"id":3717304,"issuer":{"id":3183,"kind":"organization","name":"BERKLEY W R CORP"},"owners":[{"id":152851,"kind":"person","name":"LEDERMAN IRA S","position":1,"cik":"0001225185","reported_name":"LEDERMAN IRA S","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & Secretary"}}],"security":"Common Stock","published_at":"2018-12-28T21:27:45.000Z","date":"2018-12-26","kind":"gift","acquired":false,"shares":200,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By The Carol J. Lederman Living Trust"},"balance_after":65686,"source":{"system":"sec-edgar","filing":"0000011544-18-000095","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/11544/000001154418000095/edgar.xml","form_type":"4"}},{"id":3717303,"issuer":{"id":3183,"kind":"organization","name":"BERKLEY W R CORP"},"owners":[{"id":152851,"kind":"person","name":"LEDERMAN IRA S","position":1,"cik":"0001225185","reported_name":"LEDERMAN IRA S","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & Secretary"}}],"security":"Common Stock","published_at":"2018-12-28T21:27:45.000Z","date":"2018-12-26","kind":"gift","acquired":false,"shares":350,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By The Ira S. Lederman Living Trust"},"balance_after":94735,"source":{"system":"sec-edgar","filing":"0000011544-18-000095","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/11544/000001154418000095/edgar.xml","form_type":"4"}},{"id":3850514,"issuer":{"id":3183,"kind":"organization","name":"BERKLEY W R CORP"},"owners":[{"id":152851,"kind":"person","name":"LEDERMAN IRA S","position":1,"cik":"0001225185","reported_name":"LEDERMAN IRA S","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & Secretary"}}],"security":"Common Stock","published_at":"2018-08-08T22:38:13.000Z","date":"2018-08-06","kind":"tax_withholding","acquired":false,"shares":129,"price":76.055,"value":9811.095,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Represents payment of tax liability by withholding securities incident to the vesting of performance-based RSUs."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Represents 151,715 shares of common stock underlying RSUs, all of which have vested (the receipt of which has been deferred), and does not include unvested shares of common stock underlying performance-based RSUs."}],"balance_after":151715,"source":{"system":"sec-edgar","filing":"0000011544-18-000076","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/11544/000001154418000076/edgar.xml","form_type":"4"}},{"id":3850513,"issuer":{"id":3183,"kind":"organization","name":"BERKLEY W R CORP"},"owners":[{"id":152851,"kind":"person","name":"LEDERMAN IRA S","position":1,"cik":"0001225185","reported_name":"LEDERMAN IRA S","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & Secretary"}}],"security":"Common Stock","published_at":"2018-08-08T22:38:13.000Z","date":"2018-08-06","kind":"grant","acquired":true,"shares":2924,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents the vesting of a tranche of performance-based restricted stock units (\"RSUs\") granted in 2015 under the W. R. Berkley Corporation 2018 Stock Incentive Plan (or its predecessor plan) for the three-year performance period ending June 30, 2018."}],"balance_after":151844,"source":{"system":"sec-edgar","filing":"0000011544-18-000076","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/11544/000001154418000076/edgar.xml","form_type":"4"}},{"id":4239676,"issuer":{"id":3183,"kind":"organization","name":"BERKLEY W R CORP"},"owners":[{"id":152851,"kind":"person","name":"LEDERMAN IRA S","position":1,"cik":"0001225185","reported_name":"LEDERMAN IRA S","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP & Secretary"}}],"security":"Common Stock","published_at":"2017-08-09T22:12:39.000Z","date":"2017-08-07","kind":"tax_withholding","acquired":false,"shares":775,"price":68.4525,"value":53050.6875,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents payment of tax liability by withholding securities incident to the vesting of restricted stock units (\"RSUs\")."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Represents  shares of common stock underlying RSUs, all of which have vested (the receipt of which has been deferred), and does not include unvested shares of common stock underlying performance-based RSUs."}],"balance_after":148920,"source":{"system":"sec-edgar","filing":"0000011544-17-000071","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/11544/000001154417000071/edgar.xml","form_type":"4"}}]}