STOCK TITAN

REGENXBIO (RGNX) director awarded 9,807 RSUs and 46,600 stock options

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

REGENXBIO Inc. director Argeris N. Karabelas received new equity awards as part of his compensation. He was granted 9,807 shares of common stock through a time-based restricted stock unit award that will fully vest on May 29, 2027, provided he continues to serve the company.

He also received stock options for 46,600 shares of common stock at an exercise price of $7.01 per share. These options begin vesting in 12 equal monthly installments after May 29, 2027 and expire on May 29, 2036. Following the RSU grant, he directly owns 28,861 shares of REGENXBIO common stock.

Positive

  • None.

Negative

  • None.
Insider KARABELAS ARGERIS N
Role null
Type Security Shares Price Value
Grant/Award Stock Options (Right to Buy) 46,600 $0.00 --
Grant/Award Common Stock 9,807 $0.00 --
Holdings After Transaction: Stock Options (Right to Buy) — 46,600 shares (Direct, null); Common Stock — 28,861 shares (Direct, null)
Footnotes (1)
  1. Represents shares of common stock underlying a time-based restricted stock unit award (RSU). 100% of the shares subject to this RSU will vest on May 29, 2027 subject to the continuous service of the recipient to the Issuer. The option will vest in 12 equal monthly installments following May 29, 2027 subject to the continuous service of the optionee to the Issuer.
RSU grant size 9,807 shares Time-based RSU award vesting on May 29, 2027
Options granted 46,600 options Stock Options (Right to Buy) granted May 29, 2026
Option exercise price $7.01 per share Conversion or exercise price for 46,600 stock options
Options expiration May 29, 2036 Expiration date of granted stock options
Shares owned after RSU grant 28,861 shares Total common stock directly held following the non-derivative acquisition
RSU vesting date May 29, 2027 100% of RSU shares vest on this date, subject to service
restricted stock unit financial
"Represents shares of common stock underlying a time-based restricted stock unit award (RSU)."
A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.
Stock Options (Right to Buy) financial
"security_title": "Stock Options (Right to Buy)""
exercise price financial
"conversion_or_exercise_price": "7.0100""
The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.
vesting financial
"100% of the shares subject to this RSU will vest on May 29, 2027"
Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.
continuous service financial
"subject to the continuous service of the recipient to the Issuer."
See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google
Add on Google
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
KARABELAS ARGERIS N

(Last)(First)(Middle)
C/O REGENXBIO INC.
9804 MEDICAL CENTER DRIVE

(Street)
ROCKVILLE MARYLAND 20850

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
REGENXBIO Inc. [ RGNX ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
05/29/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Common Stock05/29/2026A9,807(1)A$0.0028,861D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Stock Options (Right to Buy)$7.0105/29/2026A46,60005/29/2027(2)05/29/2036Common Stock46,600$0.0046,600D
Explanation of Responses:
1. Represents shares of common stock underlying a time-based restricted stock unit award (RSU). 100% of the shares subject to this RSU will vest on May 29, 2027 subject to the continuous service of the recipient to the Issuer.
2. The option will vest in 12 equal monthly installments following May 29, 2027 subject to the continuous service of the optionee to the Issuer.
Remarks:
/s/ Patrick J. Christmas as attorney-in-fact06/02/2026
** Signature of Reporting PersonDate
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 4 (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 4: SEC 1474 (03-26)

FAQ

What insider transactions did REGENXBIO (RGNX) director Argeris Karabelas report?

Argeris N. Karabelas reported receiving equity compensation awards from REGENXBIO. He was granted 9,807 restricted stock units and stock options for 46,600 shares, both tied to continued service, with future vesting and no open-market buying or selling involved.

How many REGENXBIO (RGNX) RSUs did director Argeris Karabelas receive?

He received 9,807 shares of REGENXBIO common stock through a restricted stock unit award. All these RSUs will vest on May 29, 2027, as long as he continues to provide uninterrupted service to the company through that vesting date.

What are the key terms of the REGENXBIO (RGNX) stock options granted to Argeris Karabelas?

He received stock options covering 46,600 shares of REGENXBIO common stock at a $7.01 exercise price. These options start vesting in 12 equal monthly installments after May 29, 2027, and remain exercisable until their expiration on May 29, 2036.

When do the REGENXBIO (RGNX) RSUs granted to Argeris Karabelas vest?

All 9,807 RSUs granted to Argeris N. Karabelas will vest on May 29, 2027. Vesting requires his continuous service to REGENXBIO through that date, making the award fully time-based rather than performance-based according to the disclosure.

How many REGENXBIO (RGNX) shares does Argeris Karabelas own after this Form 4 filing?

After the reported RSU grant, Argeris N. Karabelas directly holds 28,861 shares of REGENXBIO common stock. This figure excludes the 46,600 underlying shares tied to the newly awarded stock options, which are not yet exercised and vest over time.

Are the REGENXBIO (RGNX) insider awards to Argeris Karabelas linked to performance targets?

The awards described are time-based rather than performance-based. The RSUs vest 100% on May 29, 2027, and the options vest in 12 monthly installments after that date, in each case conditioned on his continued service to REGENXBIO.