Patrick J. Christmas - 01 Feb 2026 Form 4 Insider Report for REGENXBIO Inc. (RGNX)

Role: Chief Strategy & Legal Officer
Signature: /s/ Patrick J. Christmas
Issuer symbol: RGNX
Transactions as of: 01 Feb 2026
Net transactions value: -$52,452
Form type: 4
Filing time: 03 Feb 2026, 16:47:01 UTC
Previous filing: 08 Jan 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Christmas Patrick J.	Chief Strategy & Legal Officer	C/O REGENXBIO INC., 9804 MEDICAL CENTER DRIVE, ROCKVILLE	/s/ Patrick J. Christmas	03 Feb 2026	0001521123

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	RGNX	Common Stock	Tax liability	$52,452	-4,700	-2.2%	$11.16	210,667	01 Feb 2026	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

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 August 1, 2024. The number of shares withheld was determined based on the closing price of the issuer's common stock on February 1, 2026.