Gregory Austin Ciongoli - 25 Aug 2026 Form 4 Insider Report for REGENXBIO Inc. (RGNX)

Reporting relationship: Director
Issuer ticker: RGNX
Reported as of: 25 Aug 2026
Net transaction value: +$949,381
SEC form: 4
Accepted by SEC: 27 Aug 2026, 19:03:38 UTC
Prior SEC filing: 11 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/ Patrick J. Christmas as attorney-in-fact

Key filing fact

Gregory Austin Ciongoli filed Form 4 for REGENXBIO Inc. (RGNX) on 27 Aug 2026.

Key facts

This page summarizes Gregory Austin Ciongoli's Form 4 filing for REGENXBIO Inc. (RGNX).
4 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 27 Aug 2026, 19:03.

Change

Previous filing in this sequence was filed on 11 Jun 2026.
Current net transaction value: +$949,381.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0002023732 Primary reporting owner

Ciongoli Gregory Austin

Relationship: Director
Address: C/O REGENXBIO INC., 9804 MEDICAL CENTER DRIVE, ROCKVILLE
Signature: /s/ Patrick J. Christmas as attorney-in-fact
Signature date: 27 Aug 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

RGNX transaction

Common Stock

Award

Transaction value
Shares: +15,432
Change %
Price: $0.000000^*
Shares after: 15,432
Date: 25 Aug 2026
Ownership: Direct
Footnotes: F1

RGNX transaction

Common Stock

Purchase

Transaction value: $449,706
Shares: +49,196
Change %: +319%
Price: $9.14
Shares after: 64,628
Date: 26 Aug 2026
Ownership: Direct
Footnotes: F2

RGNX transaction

Common Stock

Purchase

Transaction value: $499,676
Shares: +53,407
Change %: +83%
Price: $9.36
Shares after: 118,035
Date: 27 Aug 2026
Ownership: Direct
Footnotes: F3

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

RGNX transaction Derivative

Stock Options (Right to buy)

Award

Transaction value
Shares: +69,609
Change %
Price: $0.000000^*
Shares after: 69,609
Date: 25 Aug 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 69,609
Exercise price: $8.91
Footnotes: F4

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 4 footnotes

Footnote F1

Represents shares of common stock underlying a time-based restricted stock unit award (RSU). 1/3rd of the shares subject to the RSU award shall vest on each of August 25, 2027, August 25, 2028 and August 25, 2029, while the recipient provides continuous service to the Issuer.

Footnote F2

Represents shares purchased in an open-market transaction. The price reported in Column 4 is a weighted average price. This transaction was executed in multiple trades at prices ranging from $8.67 to $9.35. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

Footnote F3

Represents shares purchased in an open-market transaction. The price reported in Column 4 is a weighted average price. This transaction was executed in multiple trades at prices ranging from $9.17 to $9.4525. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

Footnote F4

The option will vest over a three year period, with 1/3rd of the option vesting on August 25, 2027 and the remaining portion of the option vesting in equal monthly installments over the 24 months thereafter, while the optionee provides continuous service to the Issuer.