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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): May 7, 2024


Neurogene Inc.
(Exact name of registrant as specified in its charter)
Delaware
001-36327
98-0542593
(State or other jurisdiction of incorporation or organization)
(Commission File Number)
(I.R.S. Employer Identification No.)
535 W 24th Street, 5th Floor
New York, NY 10011
(Address of principal executive offices, including zip code)
Registrant's telephone number, including area code: (877) 237-5020
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 (see General Instruction A.2. below):

☐ 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 classTrading Symbol(s)Name of each exchange on which registered
Common Stock, $0.000001 par valueNGNE
The Nasdaq Global 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. o



Item 7.01Regulation FD Disclosure.
On May 7, 2024, Neurogene Inc. (the “Company”) issued a press release announcing that the initial safety and tolerability data from its ongoing Phase 1/2 gene therapy clinical trial for Rett syndrome was presented at the American Society for Gene and Cell Therapy Annual Meeting, demonstrating that its NGN-401 gene therapy candidate has been generally well tolerated by all three patients dosed with three, six and nine-month follow up. A copy of the press release announcing this presentation is attached as Exhibit 99.1 to this Current Report on Form 8-K.

The information in this Item 7.01 and Exhibit 99.1 attached hereto is being furnished and shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference into any filing under the Exchange Act or the Securities Act of 1933, as amended, except as expressly set forth by specific reference to such filing.

Item 9.01Financial Statements and Exhibits.
(d) Exhibits
 
Exhibit
Number
  Description
99.1  
104Cover Page Interactive Data File (embedded within the Inline XBRL document)



SIGNATURE

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

NEUROGENE INC.
Date: May 7, 2024By:/s/ Christine Mikail
Name: Christine Mikail
Title: President, Chief Financial Officer



image_0a.jpg
Neurogene Presents Favorable Safety Data from Phase 1/2 Trial of NGN-401 Gene Therapy for Rett Syndrome during ASGCT Annual Meeting
NGN-401 has been generally well-tolerated by first three patients dosed, with three to nine months of follow-up
No signs or symptoms of overexpression toxicity, including in one patient with a mild variant predicted to result in residual MeCP2 expression
Neurogene remains on track to provide interim efficacy data from the trial in 4Q:24
NEW YORK – May 7, 2024 – Neurogene Inc. (Nasdaq: NGNE), a clinical-stage company founded to bring life-changing genetic medicines to patients and families affected by rare neurological diseases, today announced initial safety and tolerability data from its ongoing Phase 1/2 gene therapy clinical trial for Rett syndrome, which showed that NGN-401 was generally well-tolerated by all three patients dosed, with follow-up of approximately nine, six and three months post-dosing. These data were presented during the American Society of Gene and Cell Therapy (ASGCT) Annual Meeting.
“We designed NGN-401 to overcome the limitations of conventional gene therapy for Rett syndrome by incorporating our EXACTTM transgene regulation technology, which we believe provides tolerable and therapeutic levels of protein expression to the key areas of the brain and nervous system that drive disease,” said Rachel McMinn, Ph.D., Founder and Chief Executive Officer of Neurogene. “The NGN-401 data presented at ASGCT demonstrate a favorable tolerability profile in the first three pediatric patients, including one with a mild variant predicted to result in residual MeCP2 expression, with no signs or symptoms of overexpression-related toxicity reported in any patient. We remain on track to share interim efficacy data from the first cohort of the trial in the fourth quarter of 2024.”
The Phase 1/2 open-label trial is evaluating the safety, tolerability, and preliminary efficacy of two dose levels of NGN-401 delivered via one-time intracerebroventricular (ICV) infusion. Enrollment of female patients ages 4-10 years old with classic Rett Syndrome and a Clinical Global Impression-Severity (CGI-S) score of 4-6 is ongoing in low-dose Cohort 1 and high-dose Cohort 2.
The baseline demographics of the first three patients who received NGN-401 in Cohort 1 (1E15 vector genomes) include:
Patient 1
Patient 2
Patient 3
Age at Dosing
7 years old
4 years old
6 years old
Race
Asian
White
White
MECP2 mutation
Mild
Severe
Severe
Time post-NGN-401 administration
~9 months
~6 months
~3 months

NGN-401 has been generally well-tolerated by all three patients. All adverse events (AEs) related to

NGN-401 have been mild, or Grade 1, and transient or resolving. Most AEs are known potential risks of adeno-associated virus (AAV), including asymptomatic laboratory value changes.
There have been no signs or symptoms indicative of MeCP2 overexpression toxicity reported in any of the three patients, including the patient with a mild variant that is predicted to result in residual MeCP2 expression. There have been no treatment-emergent or ICV procedure-related serious AEs (SAEs).
“There is a high unmet need for new treatments that can address the incredible disease burden people with Rett syndrome and their families face on a daily basis,” stated Bernhard Suter, M.D., Medical Director of the Blue Bird Circle Rett Center at Texas Children’s Hospital, Associate Professor of Pediatrics at Baylor College of Medicine, and principal investigator in the NGN-401 clinical trial. “Gene therapy has the potential to address the underlying cause of Rett syndrome with a one-time treatment, and these interim safety data from the NGN-401 trial provide an important milestone on the path to realizing its potential for patients. I look forward to the continued work in conducting the trial as we evaluate NGN-401’s safety and efficacy.”
The presentation by Dr. Suter is available as an ePoster on the ASGCT Annual Meeting platform and https://ir.neurogene.com/. The data cut-off date for this presentation was April 19, 2024.
Neurogene continues to expect to provide interim clinical data, including efficacy data, from Cohort 1 in the fourth quarter of 2024 and additional interim data, including from Cohort 2, in the second half of 2025.
About Neurogene
The mission of Neurogene is to treat devastating neurological diseases to improve the lives of patients and families impacted by these rare diseases. Neurogene is developing novel approaches and treatments to address the limitations of conventional gene therapy in central nervous system disorders. This includes selecting a delivery approach to maximize distribution to target tissues and designing products to maximize potency and purity for an optimized efficacy and safety profile. The Company’s novel and proprietary EXACT transgene regulation platform technology allows for the delivery of therapeutic levels while limiting transgene toxicity associated with conventional gene therapy. Neurogene has constructed a state-of-the-art gene therapy manufacturing facility in Houston, Texas. CGMP production of NGN-401 was conducted in this facility and will support pivotal clinical development activities. For more information, visit www.neurogene.com.
Cautionary Note Regarding Forward-Looking Statements
Statements in this press release that are not historical in nature are intended to be, and hereby are identified as, forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These statements may discuss goals, intentions and expectations as to future plans, trends, events, results of operations or financial condition, or otherwise, based on current expectations and beliefs of the management of Neurogene, as well as assumptions made by, and information currently available to, management of Neurogene, including, but not limited to, statements regarding: the therapeutic potential and utility, efficacy and clinical benefits of NGN-401; the safety and tolerability profile of NGN-401; and anticipated timing of interim clinical trial results from the Company’s NGN-401 Phase 1/2 trial for Rett syndrome. Forward-looking statements generally include statements that are predictive in nature and depend upon or refer to future events or conditions, and include words such as “may,” “will,” “should,” “would,” “expect,” “anticipate,” “plan,” “likely,” “believe,” “estimate,” “project,” “intend,” “on track,” and other similar expressions or the negative or plural of these words, or other similar expressions that are predictions or indicate future events or prospects, although not all forward-looking statements contain these words. Forward-looking statements are based on current beliefs and assumptions that are subject to risks, uncertainties and

assumptions that are difficult to predict with regard to timing, extent, likelihood, and degree of occurrence, which could cause actual results to differ materially from anticipated results and many of which are outside of Neurogene’s control. Such risks, uncertainties and assumptions include, among other things: risks related to the timing and success of enrolling patients in either or both of the cohorts of Neurogene’s Phase 1/2 clinical trial of NGN-401 for the treatment of Rett syndrome; the expected timing and results of dosing of patients in the Company’s clinical trials, including NGN-401; the potential for negative impacts to patients resulting from using a higher dose of NGN-401 in Cohort 2 of the Phase 1/2 clinical trial for the treatment of Rett syndrome, including the risk of more significant or more severe adverse events; the risk that the Company may not be able to report its data on the predicted timeline; Neurogene’s limited operating history; the risk that Neurogene may not be able to raise adequate additional capital to finance its operations, complete its clinical trials and commercialize its products; risks related to Neurogene’s ability to obtain regulatory approval for, and ultimately commercialize, its product candidates, including NGN-401; risks related to the outcome of non-clinical testing and early clinical trials for the Company’s product candidates, including the ability of those trials to satisfy relevant governmental or regulatory requirements; risks related to Neurogene’s limited experience in designing clinical trials and lack of experience in conducting clinical trials; and other risks and uncertainties identified under the heading "Risk Factors" included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2023, filed with the Securities and Exchange Commission (“SEC”) on March 18, 2024, and other filings that the Company has made and may make with the SEC in the future. Nothing in this communication should be regarded as a representation by any person that the forward-looking statements set forth herein will be achieved or that the contemplated results of any such forward-looking statements will be achieved. Forward-looking statements in this communication speak only as of the day they are made and are qualified in their entirety by reference to the cautionary statements herein. Except as required by applicable law, Neurogene undertakes no obligation to revise or update any forward-looking statement, or to make any other forward-looking statements, whether as a result of new information, future events or otherwise.

This communication contains hyperlinks to information that is not deemed to be incorporated by reference into this communication.

Company Contact:
Cara Mayfield
Vice President, Corporate Affairs
cara.mayfield@neurogene.com
Investor Contact:
Melissa Forst
Argot Partners
Neurogene@argotpartners.com


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Cover
Mar. 18, 2024
Cover [Abstract]  
Document Type 8-K
Document Period End Date May 07, 2024
Entity Registrant Name Neurogene Inc.
Entity Incorporation, State or Country Code DE
Entity File Number 001-36327
Entity Tax Identification Number 98-0542593
Entity Address, Address Line One 535 W 24th Street
Entity Address, City or Town New York
Entity Address, Address Line Two 5th Floor
Entity Address, State or Province NY
Entity Address, Postal Zip Code 10011
City Area Code 877
Local Phone Number 237-5020
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, $0.000001 par value
Trading Symbol NGNE
Security Exchange Name NASDAQ
Entity Emerging Growth Company false
Amendment Flag false
Entity Central Index Key 0001404644
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