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The remainder of the Contingent Shares vested over four years of service following October 13, 2014, with 25% of the remaining 85% of Contingent Shares having vested on October 13, 2015 and the remaining Contingent Shares having vested in 36 equal monthly installments thereafter."}],"balance_after":40830,"derivative":{"exercise_price":0.85,"expiration_date":"2024-11-03","underlying":"Common Stock","underlying_shares":20414},"source":{"system":"sec-edgar","filing":"0001562180-18-004850","document":"primarydocument.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1652825/000156218018004850/primarydocument.xml","form_type":"4"}},{"id":3741499,"issuer":{"id":2211,"kind":"organization","name":"REGENXBIO Inc.","symbol":"RGNX"},"owners":[{"id":162023,"kind":"person","name":"Yoo Stephen","position":1,"cik":"0001652825","reported_name":"Yoo Stephen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Common Stock","published_at":"2018-12-06T16:22:32.000Z","date":"2018-12-03","kind":"sale","acquired":false,"shares":507,"price":61.2,"value":31028.4,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"This transaction was executed in multiple trades at prices ranging from $61.15 to $61.40. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001562180-18-004850","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1652825/000156218018004850/primarydocument.xml","form_type":"4"}},{"id":3741498,"issuer":{"id":2211,"kind":"organization","name":"REGENXBIO Inc.","symbol":"RGNX"},"owners":[{"id":162023,"kind":"person","name":"Yoo Stephen","position":1,"cik":"0001652825","reported_name":"Yoo Stephen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Common Stock","published_at":"2018-12-06T16:22:32.000Z","date":"2018-12-03","kind":"sale","acquired":false,"shares":13053,"price":60.35,"value":787748.55,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"This transaction was executed in multiple trades at prices ranging from $60.00 to $60.97. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":507,"source":{"system":"sec-edgar","filing":"0001562180-18-004850","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1652825/000156218018004850/primarydocument.xml","form_type":"4"}},{"id":3741497,"issuer":{"id":2211,"kind":"organization","name":"REGENXBIO Inc.","symbol":"RGNX"},"owners":[{"id":162023,"kind":"person","name":"Yoo Stephen","position":1,"cik":"0001652825","reported_name":"Yoo Stephen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Common Stock","published_at":"2018-12-06T16:22:32.000Z","date":"2018-12-03","kind":"sale","acquired":false,"shares":6854,"price":59.62,"value":408635.48,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $59.00 to $59.97. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":13560,"source":{"system":"sec-edgar","filing":"0001562180-18-004850","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1652825/000156218018004850/primarydocument.xml","form_type":"4"}},{"id":3741496,"issuer":{"id":2211,"kind":"organization","name":"REGENXBIO Inc.","symbol":"RGNX"},"owners":[{"id":162023,"kind":"person","name":"Yoo Stephen","position":1,"cik":"0001652825","reported_name":"Yoo Stephen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Common Stock","published_at":"2018-12-06T16:22:32.000Z","date":"2018-12-03","kind":"exercise","acquired":true,"shares":20414,"price":0.85,"value":17351.9,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan."}],"balance_after":20414,"source":{"system":"sec-edgar","filing":"0001562180-18-004850","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1652825/000156218018004850/primarydocument.xml","form_type":"4"}},{"id":3754679,"issuer":{"id":2211,"kind":"organization","name":"REGENXBIO Inc.","symbol":"RGNX"},"owners":[{"id":162023,"kind":"person","name":"Yoo Stephen","position":1,"cik":"0001652825","reported_name":"Yoo Stephen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Employee Stock Option (Right to Buy)","published_at":"2018-11-21T16:21:32.000Z","date":"2018-11-19","kind":"exercise","acquired":false,"shares":20414,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F8","text":"The previously granted option, representing a right to purchase a total of 247,900 shares, became exercisable as follows: 165,200 of the shares subject to the option are initial shares (\"Initial Shares\") and 82,700 of the shares subject to the option are contingent shares (\"Contingent Shares\"). 23,600 of the Initial Shares vested on October 13, 2014, 35,400 of the Initial Shares vested on October 13, 2015 and an additional 2,950 of the Initial Shares vested upon each month of continuous service to the Company thereafter. 15% of the Contingent Shares were deemed vested as of October 13, 2014 on January 13, 2015 due to a subsequent event. 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The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001562180-18-004642","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1652825/000156218018004642/primarydocument.xml","form_type":"4"}},{"id":3754677,"issuer":{"id":2211,"kind":"organization","name":"REGENXBIO Inc.","symbol":"RGNX"},"owners":[{"id":162023,"kind":"person","name":"Yoo Stephen","position":1,"cik":"0001652825","reported_name":"Yoo Stephen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Common Stock","published_at":"2018-11-21T16:21:32.000Z","date":"2018-11-19","kind":"sale","acquired":false,"shares":800,"price":61.55,"value":49240.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"This transaction was executed in multiple trades at prices ranging from $61.02 to $61.845. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":1100,"source":{"system":"sec-edgar","filing":"0001562180-18-004642","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1652825/000156218018004642/primarydocument.xml","form_type":"4"}},{"id":3754676,"issuer":{"id":2211,"kind":"organization","name":"REGENXBIO Inc.","symbol":"RGNX"},"owners":[{"id":162023,"kind":"person","name":"Yoo Stephen","position":1,"cik":"0001652825","reported_name":"Yoo Stephen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Common Stock","published_at":"2018-11-21T16:21:32.000Z","date":"2018-11-19","kind":"sale","acquired":false,"shares":4361,"price":60.25,"value":262750.25,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"This transaction was executed in multiple trades at prices ranging from $59.93 to $60.71. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":1900,"source":{"system":"sec-edgar","filing":"0001562180-18-004642","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1652825/000156218018004642/primarydocument.xml","form_type":"4"}},{"id":3754675,"issuer":{"id":2211,"kind":"organization","name":"REGENXBIO Inc.","symbol":"RGNX"},"owners":[{"id":162023,"kind":"person","name":"Yoo Stephen","position":1,"cik":"0001652825","reported_name":"Yoo Stephen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Common Stock","published_at":"2018-11-21T16:21:32.000Z","date":"2018-11-19","kind":"sale","acquired":false,"shares":9092,"price":59.61,"value":541974.12,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"This transaction was executed in multiple trades at prices ranging from $58.91 to $59.90. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":6261,"source":{"system":"sec-edgar","filing":"0001562180-18-004642","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1652825/000156218018004642/primarydocument.xml","form_type":"4"}},{"id":3754674,"issuer":{"id":2211,"kind":"organization","name":"REGENXBIO Inc.","symbol":"RGNX"},"owners":[{"id":162023,"kind":"person","name":"Yoo Stephen","position":1,"cik":"0001652825","reported_name":"Yoo Stephen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Common Stock","published_at":"2018-11-21T16:21:32.000Z","date":"2018-11-19","kind":"sale","acquired":false,"shares":2300,"price":58.37,"value":134251.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"This transaction was executed in multiple trades at prices ranging from $57.90 to $58.87. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":15353,"source":{"system":"sec-edgar","filing":"0001562180-18-004642","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1652825/000156218018004642/primarydocument.xml","form_type":"4"}},{"id":3754673,"issuer":{"id":2211,"kind":"organization","name":"REGENXBIO Inc.","symbol":"RGNX"},"owners":[{"id":162023,"kind":"person","name":"Yoo Stephen","position":1,"cik":"0001652825","reported_name":"Yoo Stephen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Common Stock","published_at":"2018-11-21T16:21:32.000Z","date":"2018-11-19","kind":"sale","acquired":false,"shares":2761,"price":57.08,"value":157597.88,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $56.79 to $57.68. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":17653,"source":{"system":"sec-edgar","filing":"0001562180-18-004642","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1652825/000156218018004642/primarydocument.xml","form_type":"4"}},{"id":3754672,"issuer":{"id":2211,"kind":"organization","name":"REGENXBIO Inc.","symbol":"RGNX"},"owners":[{"id":162023,"kind":"person","name":"Yoo Stephen","position":1,"cik":"0001652825","reported_name":"Yoo Stephen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Common Stock","published_at":"2018-11-21T16:21:32.000Z","date":"2018-11-19","kind":"exercise","acquired":true,"shares":20414,"price":0.85,"value":17351.9,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan."}],"balance_after":20414,"source":{"system":"sec-edgar","filing":"0001562180-18-004642","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1652825/000156218018004642/primarydocument.xml","form_type":"4"}},{"id":3771558,"issuer":{"id":2211,"kind":"organization","name":"REGENXBIO Inc.","symbol":"RGNX"},"owners":[{"id":162023,"kind":"person","name":"Yoo Stephen","position":1,"cik":"0001652825","reported_name":"Yoo Stephen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Employee Stock Option (Right to Buy)","published_at":"2018-11-07T18:02:15.000Z","date":"2018-11-05","kind":"exercise","acquired":false,"shares":20414,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"The previously granted option, representing a right to purchase a total of 247,900 shares, became exercisable as follows: 165,200 of the shares subject to the option are initial shares (\"Initial Shares\") and 82,700 of the shares subject to the option are contingent shares (\"Contingent Shares\"). 23,600 of the Initial Shares vested on October 13, 2014, 35,400 of the Initial Shares vested on October 13, 2015 and an additional 2,950 of the Initial Shares vested upon each month of continuous service to the Company thereafter. 15% of the Contingent Shares were deemed vested as of October 13, 2014 on January 13, 2015 due to a subsequent event. The remainder of the Contingent Shares vested over four years of service following October 13, 2014, with 25% of the remaining 85% of Contingent Shares having vested on October 13, 2015 and the remaining Contingent Shares having vested in 36 equal monthly installments thereafter."}],"balance_after":81658,"derivative":{"exercise_price":0.85,"expiration_date":"2024-11-03","underlying":"Common Stock","underlying_shares":20414},"source":{"system":"sec-edgar","filing":"0001562180-18-004452","document":"primarydocument.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1652825/000156218018004452/primarydocument.xml","form_type":"4"}},{"id":3771557,"issuer":{"id":2211,"kind":"organization","name":"REGENXBIO Inc.","symbol":"RGNX"},"owners":[{"id":162023,"kind":"person","name":"Yoo Stephen","position":1,"cik":"0001652825","reported_name":"Yoo Stephen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Common Stock","published_at":"2018-11-07T18:02:15.000Z","date":"2018-11-05","kind":"sale","acquired":false,"shares":4627,"price":69.97,"value":323751.19,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"This transaction was executed in multiple trades at prices ranging from $69.83 to $70.37. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001562180-18-004452","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1652825/000156218018004452/primarydocument.xml","form_type":"4"}},{"id":3771556,"issuer":{"id":2211,"kind":"organization","name":"REGENXBIO Inc.","symbol":"RGNX"},"owners":[{"id":162023,"kind":"person","name":"Yoo Stephen","position":1,"cik":"0001652825","reported_name":"Yoo Stephen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Common Stock","published_at":"2018-11-07T18:02:15.000Z","date":"2018-11-05","kind":"sale","acquired":false,"shares":3854,"price":69.54,"value":268007.16,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"This transaction was executed in multiple trades at prices ranging from $68.83 to $69.82. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":4627,"source":{"system":"sec-edgar","filing":"0001562180-18-004452","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1652825/000156218018004452/primarydocument.xml","form_type":"4"}},{"id":3771555,"issuer":{"id":2211,"kind":"organization","name":"REGENXBIO Inc.","symbol":"RGNX"},"owners":[{"id":162023,"kind":"person","name":"Yoo Stephen","position":1,"cik":"0001652825","reported_name":"Yoo Stephen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Common Stock","published_at":"2018-11-07T18:02:15.000Z","date":"2018-11-05","kind":"sale","acquired":false,"shares":3700,"price":68.22,"value":252414.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"This transaction was executed in multiple trades at prices ranging from $67.74 to $68.63. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":8481,"source":{"system":"sec-edgar","filing":"0001562180-18-004452","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1652825/000156218018004452/primarydocument.xml","form_type":"4"}},{"id":3771554,"issuer":{"id":2211,"kind":"organization","name":"REGENXBIO Inc.","symbol":"RGNX"},"owners":[{"id":162023,"kind":"person","name":"Yoo Stephen","position":1,"cik":"0001652825","reported_name":"Yoo Stephen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Common Stock","published_at":"2018-11-07T18:02:15.000Z","date":"2018-11-05","kind":"sale","acquired":false,"shares":4820,"price":67.14,"value":323614.8,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"This transaction was executed in multiple trades at prices ranging from $66.73 to $67.66. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":12181,"source":{"system":"sec-edgar","filing":"0001562180-18-004452","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1652825/000156218018004452/primarydocument.xml","form_type":"4"}},{"id":3771553,"issuer":{"id":2211,"kind":"organization","name":"REGENXBIO Inc.","symbol":"RGNX"},"owners":[{"id":162023,"kind":"person","name":"Yoo Stephen","position":1,"cik":"0001652825","reported_name":"Yoo Stephen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Common Stock","published_at":"2018-11-07T18:02:15.000Z","date":"2018-11-05","kind":"sale","acquired":false,"shares":3413,"price":66.26,"value":226145.38,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $65.68 to $66.66. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":17001,"source":{"system":"sec-edgar","filing":"0001562180-18-004452","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1652825/000156218018004452/primarydocument.xml","form_type":"4"}},{"id":3771552,"issuer":{"id":2211,"kind":"organization","name":"REGENXBIO Inc.","symbol":"RGNX"},"owners":[{"id":162023,"kind":"person","name":"Yoo Stephen","position":1,"cik":"0001652825","reported_name":"Yoo Stephen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Common Stock","published_at":"2018-11-07T18:02:15.000Z","date":"2018-11-05","kind":"exercise","acquired":true,"shares":20414,"price":0.85,"value":17351.9,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan."}],"balance_after":20414,"source":{"system":"sec-edgar","filing":"0001562180-18-004452","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1652825/000156218018004452/primarydocument.xml","form_type":"4"}},{"id":3779040,"issuer":{"id":2211,"kind":"organization","name":"REGENXBIO Inc.","symbol":"RGNX"},"owners":[{"id":162023,"kind":"person","name":"Yoo Stephen","position":1,"cik":"0001652825","reported_name":"Yoo Stephen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Employee Stock Option (Right to Buy)","published_at":"2018-10-31T16:22:22.000Z","date":"2018-10-29","kind":"exercise","acquired":false,"shares":20414,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"The previously granted option, representing a right to purchase a total of 247,900 shares, became exercisable as follows: 165,200 of the shares subject to the option are initial shares (\"Initial Shares\") and 82,700 of the shares subject to the option are contingent shares (\"Contingent Shares\"). 23,600 of the Initial Shares vested on October 13, 2014, 35,400 of the Initial Shares vested on October 13, 2015 and an additional 2,950 of the Initial Shares vested upon each month of continuous service to the Company thereafter. 15% of the Contingent Shares were deemed vested as of October 13, 2014 on January 13, 2015 due to a subsequent event. 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The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":100,"source":{"system":"sec-edgar","filing":"0001562180-18-004338","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1652825/000156218018004338/primarydocument.xml","form_type":"4"}},{"id":3779037,"issuer":{"id":2211,"kind":"organization","name":"REGENXBIO Inc.","symbol":"RGNX"},"owners":[{"id":162023,"kind":"person","name":"Yoo Stephen","position":1,"cik":"0001652825","reported_name":"Yoo Stephen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Common Stock","published_at":"2018-10-31T16:22:22.000Z","date":"2018-10-29","kind":"sale","acquired":false,"shares":8026,"price":62.93,"value":505076.18,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"This transaction was executed in multiple trades at prices ranging from $62.285 to $63.27. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":5546,"source":{"system":"sec-edgar","filing":"0001562180-18-004338","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1652825/000156218018004338/primarydocument.xml","form_type":"4"}},{"id":3779036,"issuer":{"id":2211,"kind":"organization","name":"REGENXBIO Inc.","symbol":"RGNX"},"owners":[{"id":162023,"kind":"person","name":"Yoo Stephen","position":1,"cik":"0001652825","reported_name":"Yoo Stephen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Common Stock","published_at":"2018-10-31T16:22:22.000Z","date":"2018-10-29","kind":"sale","acquired":false,"shares":2100,"price":61.82,"value":129822.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"This transaction was executed in multiple trades at prices ranging from $61.28 to $62.27. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":13572,"source":{"system":"sec-edgar","filing":"0001562180-18-004338","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1652825/000156218018004338/primarydocument.xml","form_type":"4"}},{"id":3779035,"issuer":{"id":2211,"kind":"organization","name":"REGENXBIO Inc.","symbol":"RGNX"},"owners":[{"id":162023,"kind":"person","name":"Yoo Stephen","position":1,"cik":"0001652825","reported_name":"Yoo Stephen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Common Stock","published_at":"2018-10-31T16:22:22.000Z","date":"2018-10-29","kind":"sale","acquired":false,"shares":1700,"price":60.66,"value":103122.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"This transaction was executed in multiple trades at prices ranging from $60.26 to $61.22. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":15672,"source":{"system":"sec-edgar","filing":"0001562180-18-004338","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1652825/000156218018004338/primarydocument.xml","form_type":"4"}},{"id":3779034,"issuer":{"id":2211,"kind":"organization","name":"REGENXBIO Inc.","symbol":"RGNX"},"owners":[{"id":162023,"kind":"person","name":"Yoo Stephen","position":1,"cik":"0001652825","reported_name":"Yoo Stephen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Common Stock","published_at":"2018-10-31T16:22:22.000Z","date":"2018-10-29","kind":"sale","acquired":false,"shares":3042,"price":59.83,"value":182002.86,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $59.26 to $60.23. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":17372,"source":{"system":"sec-edgar","filing":"0001562180-18-004338","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1652825/000156218018004338/primarydocument.xml","form_type":"4"}},{"id":3779033,"issuer":{"id":2211,"kind":"organization","name":"REGENXBIO Inc.","symbol":"RGNX"},"owners":[{"id":162023,"kind":"person","name":"Yoo Stephen","position":1,"cik":"0001652825","reported_name":"Yoo Stephen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Common Stock","published_at":"2018-10-31T16:22:22.000Z","date":"2018-10-29","kind":"exercise","acquired":true,"shares":20414,"price":0.85,"value":17351.9,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan."}],"balance_after":20414,"source":{"system":"sec-edgar","filing":"0001562180-18-004338","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1652825/000156218018004338/primarydocument.xml","form_type":"4"}},{"id":3788467,"issuer":{"id":2211,"kind":"organization","name":"REGENXBIO Inc.","symbol":"RGNX"},"owners":[{"id":162023,"kind":"person","name":"Yoo Stephen","position":1,"cik":"0001652825","reported_name":"Yoo Stephen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Employee Stock Option (Right to Buy)","published_at":"2018-10-17T16:29:41.000Z","date":"2018-10-16","kind":"exercise","acquired":false,"shares":10414,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The previously granted option, representing a right to purchase a total of 247,900 shares, became exercisable as follows: 165,200 of the shares subject to the option are initial shares (\"Initial Shares\") and 82,700 of the shares subject to the option are contingent shares (\"Contingent Shares\"). 23,600 of the Initial Shares vested on October 13, 2014, 35,400 of the Initial Shares vested on October 13, 2015 and an additional 2,950 of the Initial Shares vested upon each month of continuous service to the Company thereafter. 15% of the Contingent Shares were deemed vested as of October 13, 2014 on January 13, 2015 due to a subsequent event. 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The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":100,"source":{"system":"sec-edgar","filing":"0001562180-18-004242","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1652825/000156218018004242/primarydocument.xml","form_type":"4"}},{"id":3788461,"issuer":{"id":2211,"kind":"organization","name":"REGENXBIO Inc.","symbol":"RGNX"},"owners":[{"id":162023,"kind":"person","name":"Yoo Stephen","position":1,"cik":"0001652825","reported_name":"Yoo Stephen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Common Stock","published_at":"2018-10-17T16:29:41.000Z","date":"2018-10-15","kind":"sale","acquired":false,"shares":2900,"price":58.83,"value":170607.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $58.18 to $59.17. The price reported above reflects the weighted average sale price. 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The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001562180-17-002309","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1652825/000156218017002309/primarydocument.xml","form_type":"4"}},{"id":4274615,"issuer":{"id":2211,"kind":"organization","name":"REGENXBIO Inc.","symbol":"RGNX"},"owners":[{"id":162023,"kind":"person","name":"Yoo Stephen","position":1,"cik":"0001652825","reported_name":"Yoo Stephen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Common Stock","published_at":"2017-06-22T16:27:58.000Z","date":"2017-06-20","kind":"sale","acquired":false,"shares":13100,"price":19.61,"value":256891.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $19.00 to $19.95. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":1900,"source":{"system":"sec-edgar","filing":"0001562180-17-002309","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1652825/000156218017002309/primarydocument.xml","form_type":"4"}},{"id":4274614,"issuer":{"id":2211,"kind":"organization","name":"REGENXBIO Inc.","symbol":"RGNX"},"owners":[{"id":162023,"kind":"person","name":"Yoo Stephen","position":1,"cik":"0001652825","reported_name":"Yoo Stephen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Common Stock","published_at":"2017-06-22T16:27:58.000Z","date":"2017-06-20","kind":"exercise","acquired":true,"shares":15000,"price":0.85,"value":12750.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan."}],"balance_after":15000,"source":{"system":"sec-edgar","filing":"0001562180-17-002309","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1652825/000156218017002309/primarydocument.xml","form_type":"4"}},{"id":4496526,"issuer":{"id":2211,"kind":"organization","name":"REGENXBIO Inc.","symbol":"RGNX"},"owners":[{"id":162023,"kind":"person","name":"Yoo Stephen","position":1,"cik":"0001652825","reported_name":"Yoo Stephen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Stock Option (Right to Buy)","published_at":"2017-01-06T17:00:38.000Z","date":"2017-01-04","kind":"grant","acquired":true,"shares":40000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"25% of the shares subject to this option shall vest after 12 months of continuous service with the Issuer. The balance will vest in equal monthly installments over the 36 months following 1/4/2018 while the optionee provides continuous service to the Issuer."}],"balance_after":40000,"derivative":{"exercise_price":19.5,"expiration_date":"2027-01-03","underlying":"Common Stock","underlying_shares":40000},"source":{"system":"sec-edgar","filing":"0000899243-17-000696","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1652825/000089924317000696/doc4.xml","form_type":"4"}}]}