Regenxbio Inc.

RGNX·NASDAQ·$6.31Share Price as of 11/2·$326MMarket Cap as of 11/2

Financials

10-QQ2 ended 06/30/2608/06/26 10-QQ1 ended 03/31/2605/14/26 10-KFY 202503/05/26 10-QQ3 ended 09/30/2511/06/25 10-QQ2 ended 06/30/2508/07/25

Disclosures

8-KCurrent report10/16/26 8-KCurrent report09/23/26 8-KCurrent report08/25/26 8-KCurrent report08/24/26 8-KCurrent report08/06/26

Prospectuses and Registrations

424B5Prospectus supplement07/17/26 FWPFree writing prospectus07/17/26 424B5Prospectus supplement07/16/26 424B5Prospectus supplement02/12/26 S-3Shelf registration11/26/25

Proxies

DEF 14ADefinitive proxy04/14/26 DEFA14AAdditional proxy materials04/14/26 PRE 14APreliminary proxy04/03/26 DEF 14ADefinitive proxy04/08/25 DEFA14AAdditional proxy materials04/08/25

Ownership

SC 13GBeneficial ownership10/13/26 Form 4Insider transaction09/03/26 Form 4Insider transaction09/03/26 Form 3Initial insider ownership08/27/26 Form 4Insider transaction08/27/26

Other

SC TO-I/ASC TO-I/A07/06/26 SC TO-I/ASC TO-I/A07/01/26 SC TO-IIssuer tender offer06/03/26 ARSAnnual report to shareholders04/14/26 EFFECTRequest for effectiveness12/12/25