Mills Kenneth T. - 27 Mar 2025 Form 4 Insider Report for REGENXBIO Inc. (RGNX)

Role: Director
Signature: /s/ Patrick J. Christmas as attorney-in-fact
Issuer symbol: RGNX
Transactions as of: 27 Mar 2025
Net transactions value: +$115,628
Form type: 4
Filing time: 31 Mar 2025, 17:05:18 UTC
Previous filing: 12 Aug 2024
Next filing: 14 May 2025
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	RGNX	Common Stock	Options Exercise	$115,628	+30,752	+6.9%	$3.76	475,103	27 Mar 2025	Direct	F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	RGNX	Stock Options (Right to Buy)	Options Exercise	$0	-30,752	-60%	$0.000000	20,602	27 Mar 2025	Common Stock	30,752	$3.76	Direct	F1

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

Explanation of Responses:

Id	Content
F1	The previously granted option, representing a right to purchase a total of 275,000 shares, became exercisable as follows: 25% of the shares subject to this option vested on May 19, 2016, and the balance vested in equal monthly installments over the 36 months thereafter.