REGENXBIO director Gregory Ciongoli becomes insider

REGENXBIO Inc. (RGNX) filed an initial insider ownership report (Form 3) for Gregory Austin Ciongoli, who is identified as a director of the company.

Rhea-AI Filing Summary

REGENXBIO Inc. (RGNX) filed an initial insider ownership report (Form 3) for Gregory Austin Ciongoli, who is identified as a director of the company. The filing does not list any equity transactions or current holdings and includes a Power of Attorney as an exhibit.

Key Terms

Form 3, reporting person, Power of Attorney

3 terms

Form 3 regulatory

"filed an initial insider ownership report (Form 3) for Gregory"

Form 3 is the initial public filing that officers, directors and large shareholders must submit to report their ownership of a company’s securities when they become insiders. It acts like an opening inventory sheet that gives investors a starting point to see who holds significant stakes and to spot later trades or potential conflicts of interest, helping assess insider confidence and transparency.

reporting person regulatory

"is now a reporting person under SEC rules"

Power of Attorney regulatory

"Exhibit 24 – Power of Attorney for Gregory Ciongoli"

A power of attorney is a legal document that allows one person to make decisions and act on behalf of another person, often in financial or legal matters. It’s like giving someone a trusted helper or agent the authority to handle important tasks if you are unable to do so yourself. This matters to investors because it can impact how their assets are managed or transferred if they become unable to oversee their affairs.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does the Form 3 filed for RGNX disclose about Gregory Ciongoli?

It discloses that Gregory Austin Ciongoli is a director of REGENXBIO Inc. and is now a reporting person under SEC rules. The Form 3 does not list any equity transactions or holdings for him in this filing.

Were any RGNX share transactions reported for Gregory Ciongoli on this Form 3?

No. The insider data show no buy, sell, acquisition, or disposition transactions and no holding entries associated with Gregory Austin Ciongoli on this Form 3.

Does REGENXBIO Inc. report any derivative positions for Gregory Ciongoli?

No. The derivativeSummary section is empty, indicating that no options or other derivative securities are reported for Gregory Austin Ciongoli in this Form 3.

What additional document is referenced in this RGNX Form 3 filing?

The remarks reference an exhibit: Exhibit 24 – Power of Attorney for Gregory Ciongoli, authorizing another party to sign certain documents on his behalf.

Does this RGNX Form 3 indicate Rule 10b5-1 trading plan use?

No. The document-level 10b5-1 indicator is null, and there are no transactions or footnotes describing trading pursuant to a Rule 10b5-1 plan in this filing.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/27/2026 - 07:03 PM EDT Accepted by SEC EDGAR 08/27/2026 - 07:02 PM EDT Learn about SEC filing dates

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

OMB APPROVAL

OMB Number:			3235-0104
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1. Name and Address of Reporting Person^*

Ciongoli Gregory Austin

(Last) (First) (Middle)

C/O REGENXBIO INC.

9804 MEDICAL CENTER DRIVE

(Street)

ROCKVILLE MARYLAND 20850

(City) (State) (Zip)

UNITED STATES

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
08/25/2026

3. Issuer Name and Ticker or Trading Symbol
REGENXBIO Inc. [ RGNX ]

3a. Foreign Trading Symbol

5. If Amendment, Date of Original Filed (Month/Day/Year)

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	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 Gregory Ciongoli.

No securities are beneficially owned.

	/s/ Patrick J. Christmas as attorney-in-fact	08/27/2026
	** 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.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 3: SEC 1473 (03-26)