SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person* Chan Mitchell (Last) (First) (Middle) C/O REGENXBIO INC. 9804 MEDICAL CENTER DRIVE (Street) ROCKVILLE MD 20850 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 09/16/2024	3. Issuer Name and Ticker or Trading Symbol REGENXBIO Inc. [ RGNX ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director 10% Owner Officer (give title below) Other (specify below) Chief Financial Officer	5. If Amendment, Date of Original Filed (Month/Day/Year)
			6. Individual or Joint/Group Filing (Check Applicable Line) Form filed by One Reporting Person Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks:

EXHIBIT LIST - Exhibit 24 - Power of Attorney for Mitchell Chan

No securities are beneficially owned.

	/s/ Patrick J. Christmas as attorney-in-fact	09/18/2024
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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POWER OF ATTORNEY
The undersigned individual (the "Reporting Person") hereby constitutes and
appoints each of Patrick J. Christmas and Curran M. Simpson, signing singly,
with full power of substitution, as the Reporting Person's true and lawful
attorney in fact to:
(1) prepare and file on behalf of such Reporting Person any and all reports,
notices, communications and other documents (including, but not limited to,
reports on Schedule 13D, Schedule 13G, Form 13-F, Form 3, Form 4 and Form 5)
that such Reporting Person may be required to file with the Securities and
Exchange Commission (the "SEC") pursuant to the Securities Act of 1933, as
amended, and the Securities Exchange Act of 1934, as amended (together with
the implementing regulations thereto, the "Exchange Act")
(collectively, the "Reports"), with respect to the Reporting Person's
ownership of, or transactions in, the securities of REGENXBIO Inc.
(the "Company"), (whether directly or indirectly owned) by such Reporting
Person;

(2) do and perform any and all acts for and on behalf of the Reporting Person
which may be necessary or desirable to complete and execute any such Reports,
complete and execute any amendment or amendments thereto, and timely file such
form with the SEC and any stock exchange or similar authority; and

(3) take any other action of any type whatsoever in connection with the
foregoing which, in the opinion of such attorney in fact, may be of benefit
to, in the best interest of, or legally required by, the Reporting Person, it
being understood that the documents executed by such attorney in fact on
behalf of the Reporting Person pursuant to this Power of Attorney shall be in
such form and shall contain such terms and conditions as such attorney in fact
may approve in such attorney in fact's discretion.


The Reporting Person hereby grants to such attorney in fact full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary or proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the Reporting Person
might or could do if personally present, with full power of substitution or
revocation, hereby ratifying and confirming all that such attorney in fact, or
such attorney in fact's substitute or substitutes, shall lawfully do or cause
to be done by virtue of this power of attorney and the rights and powers herein
 granted. The Reporting Person acknowledges that the foregoing attorney in
fact, in serving in such capacity at the request of the Reporting Person, is
not assuming any of the Reporting Person's responsibilities to comply with
Section 16 of the Exchange Act.
This Power of Attorney with respect to the Reporting Person shall remain in
full force and effect until such Reporting Person is no longer required to
file any Reports with respect to the Reporting Person's ownership of, or
transactions in, the securities of the Company, unless earlier revoked in a
signed writing delivered to the foregoing attorney in fact.
IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of this 17th day of September 2024.
Signature - Mitchell Chan

Mitchell Chan