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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":3106,"source":{"system":"sec-edgar","filing":"0001562180-19-002324","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1521123/000156218019002324/primarydocument.xml","form_type":"4"}},{"id":3551344,"issuer":{"id":2211,"kind":"organization","name":"REGENXBIO Inc.","symbol":"RGNX"},"owners":[{"id":26578,"kind":"person","name":"Christmas Patrick J.","position":1,"cik":"0001521123","reported_name":"Christmas Patrick J.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, General Counsel"}}],"security":"Common Stock","published_at":"2019-04-22T20:17:09.000Z","date":"2019-04-18","kind":"sale","acquired":false,"shares":1115,"price":53.67,"value":59842.05,"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 $53.20 to $54.18. 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":3991,"source":{"system":"sec-edgar","filing":"0001562180-19-002324","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1521123/000156218019002324/primarydocument.xml","form_type":"4"}},{"id":3551343,"issuer":{"id":2211,"kind":"organization","name":"REGENXBIO Inc.","symbol":"RGNX"},"owners":[{"id":26578,"kind":"person","name":"Christmas Patrick J.","position":1,"cik":"0001521123","reported_name":"Christmas Patrick J.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, General Counsel"}}],"security":"Common Stock","published_at":"2019-04-22T20:17:09.000Z","date":"2019-04-18","kind":"sale","acquired":false,"shares":2900,"price":52.55,"value":152395.0,"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 $52.12 to $53.10. 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This transaction is exempt under Rule 16b-3(c)."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"In accordance with the ESPP, these shares were purchased based on 85% of the closing price of the Issuer's common stock on December 31, 2018."}],"balance_after":3006,"source":{"system":"sec-edgar","filing":"0001562180-19-000222","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1521123/000156218019000222/primarydocument.xml","form_type":"4"}},{"id":3723155,"issuer":{"id":2211,"kind":"organization","name":"REGENXBIO Inc.","symbol":"RGNX"},"owners":[{"id":26578,"kind":"person","name":"Christmas Patrick J.","position":1,"cik":"0001521123","reported_name":"Christmas Patrick J.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, General Counsel"}}],"security":"Employee Stock Option (Right to Buy)","published_at":"2018-12-20T21:27:01.000Z","date":"2018-12-18","kind":"exercise","acquired":false,"shares":5000,"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":"F5","text":"The previously granted option, representing a right to purchase a total of 125,000 shares, became exercisable as follows: 25% of the shares subject to this option vested on August 18, 2017, and the balance vests in equal monthly installments over the 36 months thereafter while the optionee provides continuous service to the Issuer."}],"balance_after":53472,"derivative":{"exercise_price":12.1,"expiration_date":"2026-08-17","underlying":"Common Stock","underlying_shares":5000},"source":{"system":"sec-edgar","filing":"0001562180-18-005060","document":"primarydocument.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1521123/000156218018005060/primarydocument.xml","form_type":"4"}},{"id":3723154,"issuer":{"id":2211,"kind":"organization","name":"REGENXBIO Inc.","symbol":"RGNX"},"owners":[{"id":26578,"kind":"person","name":"Christmas Patrick J.","position":1,"cik":"0001521123","reported_name":"Christmas Patrick J.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, General Counsel"}}],"security":"Common Stock","published_at":"2018-12-20T21:27:01.000Z","date":"2018-12-18","kind":"sale","acquired":false,"shares":720,"price":48.97,"value":35258.4,"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 $48.77 to $49.39. 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":3389,"source":{"system":"sec-edgar","filing":"0001562180-18-005060","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1521123/000156218018005060/primarydocument.xml","form_type":"4"}},{"id":3723152,"issuer":{"id":2211,"kind":"organization","name":"REGENXBIO Inc.","symbol":"RGNX"},"owners":[{"id":26578,"kind":"person","name":"Christmas Patrick J.","position":1,"cik":"0001521123","reported_name":"Christmas Patrick J.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, General Counsel"}}],"security":"Common Stock","published_at":"2018-12-20T21:27:01.000Z","date":"2018-12-18","kind":"sale","acquired":false,"shares":2225,"price":46.79,"value":104107.75,"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 $46.21 to $47.20. 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":5444,"source":{"system":"sec-edgar","filing":"0001562180-18-005060","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1521123/000156218018005060/primarydocument.xml","form_type":"4"}},{"id":3723151,"issuer":{"id":2211,"kind":"organization","name":"REGENXBIO Inc.","symbol":"RGNX"},"owners":[{"id":26578,"kind":"person","name":"Christmas Patrick J.","position":1,"cik":"0001521123","reported_name":"Christmas Patrick J.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, General Counsel"}}],"security":"Common Stock","published_at":"2018-12-20T21:27:01.000Z","date":"2018-12-18","kind":"exercise","acquired":true,"shares":5000,"price":12.1,"value":60500.0,"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":7669,"source":{"system":"sec-edgar","filing":"0001562180-18-005060","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1521123/000156218018005060/primarydocument.xml","form_type":"4"}},{"id":3769281,"issuer":{"id":2211,"kind":"organization","name":"REGENXBIO Inc.","symbol":"RGNX"},"owners":[{"id":26578,"kind":"person","name":"Christmas Patrick J.","position":1,"cik":"0001521123","reported_name":"Christmas Patrick J.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, General Counsel"}}],"security":"Common Stock","published_at":"2018-11-09T21:20:05.000Z","date":"2018-11-07","kind":"sale","acquired":false,"shares":15000,"price":72.06,"value":1080900.0,"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 $72.00 to $72.29. 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The price reported above reflects the weighted average sale price. 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