Company: RGNX
Filing Date: 2025-03-13
Form Type: POSASR
Source: 0001193125-25-053917
Chunk: 18

Company: REGENXBIO Inc.
Filing Date: 2025-03-13
Form: POSASR
Chunk 18
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 Each series of warrants may be issued under a separate warrant agreement to be entered into between us and a bank or trust company, as warrant agent, if indicated in the applicable prospectus supplement. Any warrant agent appointed in connection with the issuance of a series of warrants will act solely as our agent in connection with such warrants and will not have any obligation or relationship of agency or trust for or with any holders or beneficial owners of warrants. A copy of the forms of the warrant agreement and the warrant certificate, if any, relating to any particular issue of warrants will be filed with the SEC each time we issue warrants, and you should read those documents for provisions that may be important to you. For more information on how you can obtain copies of the forms of the warrant agreement and the related warrant certificate, if any, see “Where You Can Find More Information.” Stock Warrants The prospectus supplement relating to a particular issue of warrants to issue shares of our common stock or shares of our preferred stock will describe the terms of the common share warrants and preferred share warrants, including the following:

| • |     | the title of the warrants; |

| • |     | the offering price for the warrants, if any; |

| • |     | the aggregate number of the warrants; |

| • |     | the designation and terms of the shares of common stock or shares of preferred stock that may be purchased upon 
 exercise of the warrants;                                                                                       |

| • |     | the terms for changes or adjustments to the exercise price of the warrants; |

| • |     | if applicable, the designation and terms of the securities with which the warrants are issued and the number of 
 warrants issued with each security;                                                                             |

| • |     | if applicable, the date from and after which the warrants and any securities issued with the warrants will be 
 separately transferable;                                                                                      |

| • |     | the number of shares of common stock or shares of preferred stock that may be purchased upon exercise of a 
 warrant and the price at which the shares may be purchased upon exercise;                                  |

| • |     | the dates on which the right to exercise the warrants commence and expire; |

| • |     | if applicable, the minimum or maximum amount of the warrants that may be exercised at any one time; |

| • |     | the currency or currency units in which the offering price, if any, and the exercise price are payable; |

| • |     | if applicable, a discussion of material U.S. federal income tax considerations