REGENXBIO files 8‑K with Exhibit 99.1 for Q3 2025 update

Rhea-AI Filing Summary

REGENXBIO Inc. (RGNX) furnished quarterly results. The company submitted an 8‑K announcing it issued a press release covering results of operations and financial condition for the quarter ended September 30, 2025. The press release is included as Exhibit 99.1 and incorporated by reference therein.

The information under Item 2.02 and Exhibit 99.1 is furnished, not filed, under the Exchange Act. REGENXBIO’s common stock trades on the Nasdaq Global Select Market under the symbol RGNX.

8-K Event Classification

2 items: 2.02, 9.01

2 items

Item 2.02 Results of Operations and Financial Condition Financial

Disclosure of earnings results, typically an earnings press release or preliminary financials.

Item 9.01 Financial Statements and Exhibits Exhibits

Financial statements, pro forma financial information, and exhibit attachments filed with this report.

Understanding 8-K Material Events →

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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): November 06, 2025

REGENXBIO Inc.

(Exact name of Registrant as Specified in Its Charter)

Delaware			001-37553	47-1851754
(State or Other Jurisdiction of Incorporation)			(Commission File Number)	(IRS Employer Identification No.)
9804 Medical Center Drive
Rockville, Maryland				20850
(Address of Principal Executive Offices)				(Zip Code)

Registrant’s Telephone Number, Including Area Code: (240) 552-8181

N/A

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class		Trading Symbol(s)		Name of each exchange on which registered
Common Stock, par value $0.0001 per share		RGNX		The Nasdaq Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02. Results of Operations and Financial Condition.

On November 6, 2025, REGENXBIO Inc. (the “Company”) issued a press release regarding its results of operations and financial condition for the quarter ended September 30, 2025. The press release is furnished as Exhibit 99.1 to this Current Report on Form 8‑K and is incorporated by reference herein.

The information in Item 2.02 of this Current Report on Form 8‑K and Exhibit 99.1 attached hereto shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to liability under that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such a filing.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits

Exhibit No.		Description
99.1		Press release dated November 6, 2025 relating to REGENXBIO Inc.’s financial results.
104		The cover page from this Current Report on Form 8-K, formatted in Inline XBRL.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

			REGENXBIO INC.
Date:	November 6, 2025	By:	/s/ Patrick J. Christmas II
			Patrick J. Christmas II Executive Vice President, Chief Strategy & Legal Officer

FAQ

What did REGENXBIO (RGNX) announce in this 8-K?

The company furnished a press release with results of operations and financial condition for the quarter ended September 30, 2025, as Exhibit 99.1.

Which exhibit contains REGENXBIO’s Q3 2025 details?

Exhibit 99.1 contains the press release with quarterly results.

Is the information considered filed or furnished?

The information in Item 2.02 and Exhibit 99.1 is furnished, not filed, under the Exchange Act.

What is REGENXBIO’s trading symbol and exchange?

The common stock trades as RGNX on the Nasdaq Global Select Market.

What period does the press release cover?

It covers the quarter ended September 30, 2025.

When was the press release dated?

The press release is dated November 6, 2025.