RGNX Rule 144: Proposed sale of 43,206 shares

RGNX Rule 144 notice reporting a proposed sale of 43,206 shares of Common Stock tied to an Exercise of Stock Options, scheduled 07/01/2026.

Rhea-AI Filing Summary

RGNX Rule 144 notice reporting a proposed sale of 43,206 shares of Common Stock tied to an Exercise of Stock Options, scheduled 07/01/2026. The filing also lists prior 10b5-1 sales by Stephen Pakola: 19,608 shares on 06/29/2026 for $216,560.60 and 15,309 shares on 05/11/2026 for $168,737.84.

Insights

Securities Attorney

Rule 144 notice for a proposed sale tied to option exercise; recent 10b5-1 sales are disclosed.

The filing reports a proposed sale of 43,206 shares via an Exercise of Stock Options scheduled 07/01/2026. It lists two prior 10b5-1 disposals by Stephen Pakola totaling 34,917 shares across 05/11/2026 and 06/29/2026.

Transaction timing and mechanics are stated; cash‑flow treatment and purchaser details are not included in the excerpt. Subsequent filings or broker confirmations may provide closing details.

Key Figures

Proposed sale: 43,206 shares 10b5-1 sale (Jun): 19,608 shares 10b5-1 sale (May): 15,309 shares +1 more

4 metrics

Proposed sale 43,206 shares scheduled <date>07/01/2026</date>, tied to Exercise of Stock Options

10b5-1 sale (Jun) 19,608 shares sold on <date>06/29/2026</date> for <money>$216,560.60</money>

10b5-1 sale (May) 15,309 shares sold on <date>05/11/2026</date> for <money>$168,737.84</money>

Aggregate prior disclosed shares 34,917 shares sum of the two 10b5-1 sales listed in the excerpt

Key Terms

Rule 144, 10b5-1 sales, Exercise of Stock Options

3 terms

Rule 144 regulatory

"Rule 144 notice reporting the proposed sale of 43,206 shares"

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

10b5-1 sales regulatory

"10b5-1 Sales for STEPHEN PAKOLA listed on 06/29/2026 and 05/11/2026"

10b5-1 sales are pre-arranged stock-trading plans that let company insiders automatically buy or sell shares according to a fixed schedule or formula, even if they later learn confidential information. Think of it as setting up an automatic thermostat for trades: it creates a clear, documented path that can protect insiders from insider-trading accusations and gives investors a signal about predictable insider activity—though it can also simply be a way for insiders to diversify or raise cash.

Exercise of Stock Options financial

"Securities To Be Sold: Exercise of Stock Options scheduled 07/01/2026"

FAQ

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

What does the RGNX Rule 144 notice report?

It reports a proposed sale of 43,206 shares of Common Stock tied to an Exercise of Stock Options, scheduled 07/01/2026. The filing also discloses prior 10b5-1 sales by an affiliated holder.

Who executed recent 10b5-1 sales listed in the RGNX filing?

The filing lists 10b5-1 sales by Stephen Pakola: 19,608 shares sold on 06/29/2026 for $216,560.60 and 15,309 shares on 05/11/2026 for $168,737.84.

Does the filing state who will receive proceeds from the RGNX sale?

The excerpt specifies the method as Cash for the exercise on 07/01/2026. The filing does not state additional parties receiving proceeds or detailed cash allocation in the provided text.

Are the prior 10b5-1 sales part of the proposed registered amount?

The filing lists prior 10b5-1 sales as historical transactions. The proposed sale amount of 43,206 shares is reported separately for 07/01/2026 and is presented as the proposed action in this notice.

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

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Accepted by SEC EDGAR 07/01/2026 - 04:30 PM EDT Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001700659
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	REGENXBIO Inc.
SEC File Number	001-37553
Address of Issuer	9804 Medical Center Drive Rockville MARYLAND 20850
Phone	2405528181
Name of Person for Whose Account the Securities are To Be Sold	Stephen J. Pakola
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	43206	517607.88	51697621	07/01/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	07/01/2026	Exercise of Stock Options	Issuer			43206	07/01/2026	Cash

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
10b5-1 Sales for STEPHEN PAKOLA 9804 Medical Center Drive Rockville MD 20850	Common	06/29/2026	19608	216560.60
10b5-1 Sales for STEPHEN PAKOLA 9804 Medical Center Drive Rockville MD 20850	Common	05/11/2026	15309	168737.84

144: Remarks and Signature

Remarks	The securities to be sold were and will be received upon the exercise of stock options over the next three months. The dates of acquisition and payment were and will be the dates of exercise/sale.
Date of Notice	07/01/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	11/12/2025
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Stephen J. Pakola
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)