Company: RGNX
Filing Date: 2025-06-13
Form Type: S-3
Source: 0001193125-25-140870
Chunk: 22

Company: REGENXBIO Inc.
Filing Date: 2025-06-13
Form: S-3
Chunk 22
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 exhibits to these documents unless the exhibits are specifically incorporated by reference into these documents or referred to in this prospectus) by writing or calling us at: REGENXBIO Inc. Attention: Chief Legal Officer 9804 Medical Center Drive Rockville, MD 20850 (240) 552-8181 15

Up to 268,096 Shares of Common Stock

PROSPECTUS

, 2025

PART II INFORMATION NOT REQUIRED IN PROSPECTUS

| Item 14. | Other Expenses of Issuance and Distribution |

The following table sets forth an itemization of all estimated expenses in connection with the issuance and distribution of the securities being registered, all of which will be borne by the registrant.

| SEC registration fee         |     | $ |    612.40 |
| Legal fees and expenses      |     | $ | 30,000.00 |
| Accounting fees and expenses |     | $ | 15,000.00 |
| Miscellaneous expenses       |     | $ |  5,000.00 |
| Total                        |     | $ | 50,612.40 |

| Item 15. | Indemnification of Directors and Officers |

Section 102 of the Delaware General Corporation Law permits a corporation to eliminate the personal liability of its directors to the corporation or its stockholders for monetary damages for a breach of fiduciary duty as a director, except where the director breached his or her duty of loyalty, failed to act in good faith, engaged in intentional misconduct or knowingly violated a law, authorized the payment of a dividend or approved a stock repurchase in violation of Delaware corporate law or obtained an improper personal benefit. Section 145 of the Delaware General Corporation Law authorizes a court to award, or a corporation’s board of directors to grant, indemnity to directors and officers under certain circumstances and subject to certain limitations. The terms of Section 145 of the Delaware General Corporation Law are sufficiently broad to permit indemnification under certain circumstances for liabilities, including reimbursement of expenses incurred, arising under the Securities Act. As permitted by the Delaware General Corporation Law, our restated certificate of incorporation and amended and restated bylaws contain provisions relating to the limitation of liability and indemnification of directors and officers. The restated certificate of incorporation provides that our directors will not be personally liable to us or our stockholders for monetary damages for any breach of fiduciary duty as a director, except for liability:

| • |     | for any breach of the director’s