| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Chan Mitchell | Chief Financial Officer | C/O REGENXBIO INC., 9804 MEDICAL CENTER DRIVE, ROCKVILLE | /s/ Patrick J. Christmas as attorney-in-fact | 03 Sep 2025 | 0001789335 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | RGNX | Common Stock | Tax liability | -$43.8K | -4.9K | -8.33% | $8.93 | 54K | 01 Sep 2025 | Direct | F1 |
| Id | Content |
|---|---|
| F1 | Represents shares of common stock withheld to pay taxes upon the vesting of restricted stock units originally granted to the reporting person on September 16, 2024. The number of shares withheld was determined based on the closing price of the issuer's common stock on August 29, 2025. |