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[8-K] Ultragenyx Pharmaceutical Inc. Reports Material Event

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Ultragenyx Pharmaceutical Inc. (Nasdaq: RARE) disclosed that the U.S. FDA issued a Complete Response Letter (CRL) for the Biologics License Application (BLA) of UX111 (ABO-102), its AAV gene therapy for Sanfilippo syndrome type A. The agency is requesting additional chemistry, manufacturing and controls (CMC) information and remediation of observations from recent facility inspections. The CRL does not cite deficiencies in the clinical data package; the FDA characterized neurodevelopmental and biomarker data as robust and asked only for updated data in the resubmission.

The company believes the cited issues are facility- and process-related and “readily addressable.” Management plans to engage the FDA over the coming months, then resubmit the BLA, which would trigger a new review period of up to six months. No timeline for resubmission was provided, but the disclosure implies at least a several-month delay to potential approval and launch.

Investor takeaway: Receipt of a CRL materially delays potential commercialization and revenue generation from UX111, introduces additional regulatory risk, and may elevate operating costs as manufacturing processes are refined. Mitigating factors include the absence of clinical concerns and the company’s confidence that CMC issues can be resolved.

Ultragenyx Pharmaceutical Inc. (Nasdaq: RARE) ha comunicato che la FDA statunitense ha emesso una Lettera di Risposta Completa (CRL) per la Domanda di Licenza Biologica (BLA) relativa a UX111 (ABO-102), la sua terapia genica AAV per la sindrome di Sanfilippo di tipo A. L'agenzia richiede ulteriori informazioni sulla chimica, produzione e controlli (CMC) e la risoluzione delle osservazioni emerse dalle recenti ispezioni degli stabilimenti. La CRL non evidenzia carenze nei dati clinici; la FDA ha definito robusti i dati neuroevolutivi e i biomarcatori, chiedendo solo dati aggiornati nella nuova presentazione.

L'azienda ritiene che le problematiche segnalate siano legate agli stabilimenti e ai processi, e siano “facilmente risolvibili.” La direzione prevede di interagire con la FDA nei prossimi mesi, per poi ripresentare la BLA, il che comporterebbe un nuovo periodo di revisione fino a sei mesi. Non è stata fornita una tempistica per la ripresentazione, ma la comunicazione suggerisce un ritardo di almeno alcuni mesi nell'approvazione e nel lancio potenziale.

Considerazioni per gli investitori: La ricezione della CRL comporta un ritardo significativo nella possibile commercializzazione e generazione di ricavi da UX111, introduce un rischio regolatorio aggiuntivo e potrebbe aumentare i costi operativi durante il perfezionamento dei processi produttivi. Fattori attenuanti sono l'assenza di preoccupazioni cliniche e la fiducia dell'azienda nella risoluzione delle problematiche CMC.

Ultragenyx Pharmaceutical Inc. (Nasdaq: RARE) informó que la FDA de EE.UU. emitió una Carta de Respuesta Completa (CRL) para la Solicitud de Licencia Biológica (BLA) de UX111 (ABO-102), su terapia génica AAV para el síndrome de Sanfilippo tipo A. La agencia solicita información adicional sobre química, fabricación y controles (CMC) y la corrección de observaciones derivadas de inspecciones recientes en las instalaciones. La CRL no menciona deficiencias en el paquete de datos clínicos; la FDA calificó los datos neurodesarrollativos y los biomarcadores como sólidos y solo pidió datos actualizados en la re-presentación.

La compañía considera que los problemas señalados están relacionados con las instalaciones y procesos, y son “fácilmente solucionables.” La dirección planea interactuar con la FDA en los próximos meses y luego volver a presentar la BLA, lo que activaría un nuevo período de revisión de hasta seis meses. No se proporcionó un cronograma para la re-presentación, pero la divulgación implica un retraso de al menos varios meses para la posible aprobación y lanzamiento.

Conclusión para inversores: La recepción de la CRL retrasa significativamente la posible comercialización y generación de ingresos de UX111, introduce un riesgo regulatorio adicional y puede aumentar los costos operativos mientras se refinan los procesos de fabricación. Factores mitigantes incluyen la ausencia de preocupaciones clínicas y la confianza de la compañía en que los problemas CMC pueden resolverse.

Ultragenyx Pharmaceutical Inc. (나스닥: RARE)는 미국 FDA가 산필리포 증후군 A형에 대한 자사의 AAV 유전자 치료제 UX111(ABO-102)의 생물학적 제제 허가 신청서(BLA)에 대해 완전응답서한(CRL)을 발행했다고 발표했습니다. FDA는 최근 시설 검사에서 발견된 사항들을 해결하고, 화학, 제조 및 관리(CMC) 관련 추가 정보를 요구하고 있습니다. CRL은 임상 데이터 패키지에 결함이 없음을 명시하고 있습니다; FDA는 신경발달 및 바이오마커 데이터를 견고하다고 평가하며 재제출 시 최신 데이터만 요청했습니다.

회사는 지적된 문제들이 시설 및 공정과 관련된 것으로 “쉽게 해결 가능”하다고 보고 있습니다. 경영진은 향후 몇 달간 FDA와 협의한 후 BLA를 재제출할 계획이며, 이는 최대 6개월의 신규 심사 기간을 촉발합니다. 재제출 일정은 명시되지 않았으나, 이번 공개는 승인 및 출시가 최소 몇 달 지연될 가능성을 시사합니다.

투자자 요점: CRL 수령은 UX111의 잠재적 상업화 및 수익 창출을 실질적으로 지연시키고, 추가적인 규제 위험을 가져오며, 제조 공정 개선 과정에서 운영 비용이 증가할 수 있습니다. 완화 요인으로는 임상 관련 우려가 없고, 회사가 CMC 문제를 해결할 수 있다는 자신감이 있습니다.

Ultragenyx Pharmaceutical Inc. (Nasdaq : RARE) a annoncé que la FDA américaine a émis une lettre de réponse complète (CRL) concernant la demande d'autorisation de mise sur le marché biologique (BLA) de UX111 (ABO-102), sa thérapie génique AAV pour le syndrome de Sanfilippo de type A. L'agence demande des informations supplémentaires sur la chimie, la fabrication et les contrôles (CMC) ainsi que la correction des observations issues des inspections récentes des installations. La CRL ne mentionne aucune insuffisance dans le dossier clinique ; la FDA a qualifié les données neurodéveloppementales et les biomarqueurs de robustes et a uniquement demandé des données actualisées lors de la nouvelle soumission.

L'entreprise estime que les problèmes évoqués sont liés aux installations et aux processus, et qu'ils sont « facilement résolubles ». La direction prévoit d'échanger avec la FDA dans les mois à venir, puis de soumettre à nouveau la BLA, ce qui déclencherait une nouvelle période d'examen pouvant aller jusqu'à six mois. Aucun calendrier de resoumission n'a été communiqué, mais la divulgation laisse entendre un retard d'au moins plusieurs mois avant une éventuelle approbation et mise sur le marché.

Point clé pour les investisseurs : La réception de la CRL retarde significativement la commercialisation potentielle et la génération de revenus de UX111, introduit un risque réglementaire supplémentaire et pourrait augmenter les coûts opérationnels lors de l'affinement des processus de fabrication. Les facteurs atténuants incluent l'absence de préoccupations cliniques et la confiance de l'entreprise dans la résolution des problèmes CMC.

Ultragenyx Pharmaceutical Inc. (Nasdaq: RARE) gab bekannt, dass die US-amerikanische FDA einen Complete Response Letter (CRL) für den Biologics License Application (BLA) von UX111 (ABO-102), ihrer AAV-Gentherapie für das Sanfilippo-Syndrom Typ A, ausgestellt hat. Die Behörde verlangt zusätzliche Informationen zu Chemie, Herstellung und Kontrollen (CMC) sowie die Behebung von Beanstandungen aus jüngsten Anlageninspektionen. Der CRL führt keine Mängel im klinischen Datenpaket auf; die FDA bewertete die neuroentwicklungsbezogenen und Biomarkerdaten als robust und forderte lediglich aktualisierte Daten bei der erneuten Einreichung.

Das Unternehmen ist der Ansicht, dass die genannten Probleme an den Einrichtungen und Prozessen liegen und „leicht zu beheben“ sind. Das Management plant, in den kommenden Monaten mit der FDA zu kommunizieren und anschließend den BLA erneut einzureichen, was eine neue Prüfungsfrist von bis zu sechs Monaten auslösen würde. Ein Zeitplan für die erneute Einreichung wurde nicht genannt, aber die Mitteilung deutet auf eine Verzögerung von mindestens mehreren Monaten bis zur potenziellen Zulassung und Markteinführung hin.

Investorenausblick: Der Erhalt des CRL verzögert die potenzielle Kommerzialisierung und Umsatzgenerierung von UX111 erheblich, bringt zusätzliches regulatorisches Risiko mit sich und könnte die Betriebskosten erhöhen, während die Herstellungsprozesse verfeinert werden. Mildernde Faktoren sind das Fehlen klinischer Bedenken und das Vertrauen des Unternehmens, dass die CMC-Probleme gelöst werden können.

Positive
  • No clinical deficiencies cited; FDA deems neurodevelopmental and biomarker data robust.
  • Issues confined to CMC and facilities, which management believes are addressable.
  • FDA invites swift resubmission; review clock expected to be six months once filed.
Negative
  • Complete Response Letter materially delays potential UX111 approval and commercialization.
  • Additional CMC work and facility remediation will increase costs and execution risk.
  • Timeline for resubmission is uncertain, extending regulatory overhang for investors.

Insights

TL;DR: FDA CRL delays UX111 approval due to CMC and facility issues; clinical data intact.

The FDA’s Complete Response Letter shifts the regulatory pathway from imminent approval to an undefined remediation phase. CMC and facility observations typically require documentary fixes, supplemental validation runs, or re-inspections—all time-consuming and resource-intensive. Although the absence of clinical deficiencies protects the underlying therapeutic rationale, gene therapies face heightened scrutiny on manufacturing consistency, and repeat AAV batches can be costly. Resubmission triggers a new up-to-6-month review clock, so earliest approval now likely slips into 2H 2026. Given UX111 targets an ultra-rare population with limited alternatives, delay erodes potential first-mover advantage and postpones rare-disease priority review vouchers or anticipated cash flows.

TL;DR: Negative near-term catalyst; manageable if CMC fixes succeed; cash burn may rise.

The CRL removes a near-term approval catalyst investors had embedded in valuation models. Consensus peak-sales timelines must shift, impacting discounted cash-flow calculations. Management’s assertion that issues are ‘readily addressable’ offers some relief, but execution risk remains, especially given Ultragenyx’s limited in-house manufacturing track record. Additional spending on remediation and possible re-inspection could expand operating loss in FY25-26. Balance-sheet sufficiency is not discussed in the filing, leaving open questions on runway. Nonetheless, the FDA’s positive view of efficacy data preserves long-term value of the asset, keeping competitive dynamics unchanged. Overall impact: moderately negative until clarity on resubmission timing emerges.

Ultragenyx Pharmaceutical Inc. (Nasdaq: RARE) ha comunicato che la FDA statunitense ha emesso una Lettera di Risposta Completa (CRL) per la Domanda di Licenza Biologica (BLA) relativa a UX111 (ABO-102), la sua terapia genica AAV per la sindrome di Sanfilippo di tipo A. L'agenzia richiede ulteriori informazioni sulla chimica, produzione e controlli (CMC) e la risoluzione delle osservazioni emerse dalle recenti ispezioni degli stabilimenti. La CRL non evidenzia carenze nei dati clinici; la FDA ha definito robusti i dati neuroevolutivi e i biomarcatori, chiedendo solo dati aggiornati nella nuova presentazione.

L'azienda ritiene che le problematiche segnalate siano legate agli stabilimenti e ai processi, e siano “facilmente risolvibili.” La direzione prevede di interagire con la FDA nei prossimi mesi, per poi ripresentare la BLA, il che comporterebbe un nuovo periodo di revisione fino a sei mesi. Non è stata fornita una tempistica per la ripresentazione, ma la comunicazione suggerisce un ritardo di almeno alcuni mesi nell'approvazione e nel lancio potenziale.

Considerazioni per gli investitori: La ricezione della CRL comporta un ritardo significativo nella possibile commercializzazione e generazione di ricavi da UX111, introduce un rischio regolatorio aggiuntivo e potrebbe aumentare i costi operativi durante il perfezionamento dei processi produttivi. Fattori attenuanti sono l'assenza di preoccupazioni cliniche e la fiducia dell'azienda nella risoluzione delle problematiche CMC.

Ultragenyx Pharmaceutical Inc. (Nasdaq: RARE) informó que la FDA de EE.UU. emitió una Carta de Respuesta Completa (CRL) para la Solicitud de Licencia Biológica (BLA) de UX111 (ABO-102), su terapia génica AAV para el síndrome de Sanfilippo tipo A. La agencia solicita información adicional sobre química, fabricación y controles (CMC) y la corrección de observaciones derivadas de inspecciones recientes en las instalaciones. La CRL no menciona deficiencias en el paquete de datos clínicos; la FDA calificó los datos neurodesarrollativos y los biomarcadores como sólidos y solo pidió datos actualizados en la re-presentación.

La compañía considera que los problemas señalados están relacionados con las instalaciones y procesos, y son “fácilmente solucionables.” La dirección planea interactuar con la FDA en los próximos meses y luego volver a presentar la BLA, lo que activaría un nuevo período de revisión de hasta seis meses. No se proporcionó un cronograma para la re-presentación, pero la divulgación implica un retraso de al menos varios meses para la posible aprobación y lanzamiento.

Conclusión para inversores: La recepción de la CRL retrasa significativamente la posible comercialización y generación de ingresos de UX111, introduce un riesgo regulatorio adicional y puede aumentar los costos operativos mientras se refinan los procesos de fabricación. Factores mitigantes incluyen la ausencia de preocupaciones clínicas y la confianza de la compañía en que los problemas CMC pueden resolverse.

Ultragenyx Pharmaceutical Inc. (나스닥: RARE)는 미국 FDA가 산필리포 증후군 A형에 대한 자사의 AAV 유전자 치료제 UX111(ABO-102)의 생물학적 제제 허가 신청서(BLA)에 대해 완전응답서한(CRL)을 발행했다고 발표했습니다. FDA는 최근 시설 검사에서 발견된 사항들을 해결하고, 화학, 제조 및 관리(CMC) 관련 추가 정보를 요구하고 있습니다. CRL은 임상 데이터 패키지에 결함이 없음을 명시하고 있습니다; FDA는 신경발달 및 바이오마커 데이터를 견고하다고 평가하며 재제출 시 최신 데이터만 요청했습니다.

회사는 지적된 문제들이 시설 및 공정과 관련된 것으로 “쉽게 해결 가능”하다고 보고 있습니다. 경영진은 향후 몇 달간 FDA와 협의한 후 BLA를 재제출할 계획이며, 이는 최대 6개월의 신규 심사 기간을 촉발합니다. 재제출 일정은 명시되지 않았으나, 이번 공개는 승인 및 출시가 최소 몇 달 지연될 가능성을 시사합니다.

투자자 요점: CRL 수령은 UX111의 잠재적 상업화 및 수익 창출을 실질적으로 지연시키고, 추가적인 규제 위험을 가져오며, 제조 공정 개선 과정에서 운영 비용이 증가할 수 있습니다. 완화 요인으로는 임상 관련 우려가 없고, 회사가 CMC 문제를 해결할 수 있다는 자신감이 있습니다.

Ultragenyx Pharmaceutical Inc. (Nasdaq : RARE) a annoncé que la FDA américaine a émis une lettre de réponse complète (CRL) concernant la demande d'autorisation de mise sur le marché biologique (BLA) de UX111 (ABO-102), sa thérapie génique AAV pour le syndrome de Sanfilippo de type A. L'agence demande des informations supplémentaires sur la chimie, la fabrication et les contrôles (CMC) ainsi que la correction des observations issues des inspections récentes des installations. La CRL ne mentionne aucune insuffisance dans le dossier clinique ; la FDA a qualifié les données neurodéveloppementales et les biomarqueurs de robustes et a uniquement demandé des données actualisées lors de la nouvelle soumission.

L'entreprise estime que les problèmes évoqués sont liés aux installations et aux processus, et qu'ils sont « facilement résolubles ». La direction prévoit d'échanger avec la FDA dans les mois à venir, puis de soumettre à nouveau la BLA, ce qui déclencherait une nouvelle période d'examen pouvant aller jusqu'à six mois. Aucun calendrier de resoumission n'a été communiqué, mais la divulgation laisse entendre un retard d'au moins plusieurs mois avant une éventuelle approbation et mise sur le marché.

Point clé pour les investisseurs : La réception de la CRL retarde significativement la commercialisation potentielle et la génération de revenus de UX111, introduit un risque réglementaire supplémentaire et pourrait augmenter les coûts opérationnels lors de l'affinement des processus de fabrication. Les facteurs atténuants incluent l'absence de préoccupations cliniques et la confiance de l'entreprise dans la résolution des problèmes CMC.

Ultragenyx Pharmaceutical Inc. (Nasdaq: RARE) gab bekannt, dass die US-amerikanische FDA einen Complete Response Letter (CRL) für den Biologics License Application (BLA) von UX111 (ABO-102), ihrer AAV-Gentherapie für das Sanfilippo-Syndrom Typ A, ausgestellt hat. Die Behörde verlangt zusätzliche Informationen zu Chemie, Herstellung und Kontrollen (CMC) sowie die Behebung von Beanstandungen aus jüngsten Anlageninspektionen. Der CRL führt keine Mängel im klinischen Datenpaket auf; die FDA bewertete die neuroentwicklungsbezogenen und Biomarkerdaten als robust und forderte lediglich aktualisierte Daten bei der erneuten Einreichung.

Das Unternehmen ist der Ansicht, dass die genannten Probleme an den Einrichtungen und Prozessen liegen und „leicht zu beheben“ sind. Das Management plant, in den kommenden Monaten mit der FDA zu kommunizieren und anschließend den BLA erneut einzureichen, was eine neue Prüfungsfrist von bis zu sechs Monaten auslösen würde. Ein Zeitplan für die erneute Einreichung wurde nicht genannt, aber die Mitteilung deutet auf eine Verzögerung von mindestens mehreren Monaten bis zur potenziellen Zulassung und Markteinführung hin.

Investorenausblick: Der Erhalt des CRL verzögert die potenzielle Kommerzialisierung und Umsatzgenerierung von UX111 erheblich, bringt zusätzliches regulatorisches Risiko mit sich und könnte die Betriebskosten erhöhen, während die Herstellungsprozesse verfeinert werden. Mildernde Faktoren sind das Fehlen klinischer Bedenken und das Vertrauen des Unternehmens, dass die CMC-Probleme gelöst werden können.

0001515673false00015156732025-07-112025-07-11

 

 

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): July 11, 2025

 

 

Ultragenyx Pharmaceutical Inc.

(Exact name of Registrant as Specified in Its Charter)

 

 

Delaware

001-36276

27-2546083

(State or Other Jurisdiction
of Incorporation)

(Commission File Number)

(IRS Employer
Identification No.)

 

 

 

 

 

60 Leveroni Court

 

Novato, California

 

94949

(Address of Principal Executive Offices)

 

(Zip Code)

 

Registrant’s Telephone Number, Including Area Code: 415 483-8800

 

 

(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, $0.001 par value

 

RARE

 

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 8.01

Other Events.

On July 11, 2025, Ultragenyx Pharmaceutical Inc. (the “Company”) announced that the U.S. Food and Drug Administration (the “FDA”) has issued a Complete Response Letter (“CRL”) for its Biologics License Application (“BLA”) for UX111 (ABO-102) AAV gene therapy as a treatment for patients with Sanfilippo syndrome type A (MPS IIIA).

In the CRL, the FDA requested that the Company provide additional information and improvements related to specific aspects of chemistry, manufacturing and controls (“CMC”) and observations from the recently completed manufacturing facility inspections. The Company believes that these observations are readily addressable, related to facilities and processes, and are not directly related to the quality of the product. The Company will be working with the FDA over the next few months to resolve the observations. Once resolution is achieved, the Company expects to resubmit the BLA and anticipates up to a six-month review period to follow the resubmission.

Clinical review had been ongoing and the FDA has acknowledged that the neurodevelopmental outcome data provided to date are robust and the biomarker data provide additional supportive evidence. The CRL did not note any review issues related to the clinical data package nor clinical inspections, and asked that updated clinical data from current patients be included in the resubmission.

Cautionary Note Regarding Forward-Looking Statements

This Current Report on Form 8-K contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These statements may be identified by the use of words such as, but not limited to, “anticipates,” “continue,” “will,” or other similar terms or expressions that concern the Company’s expectations, plans and intentions. Forward-looking statements include, without limitation, statements related to the Company’s ability to provide the requested documentation and address the comments in the CRL to the satisfaction of the FDA, the development, timing and progress of UX111, including the timing of resubmission of the BLA and the timing of FDA review of any such resubmission, the timing and outcome of any FDA inspections related to UX111, the timing of future regulatory interactions related to UX111, including the potential Type A meeting, the outcome of any BLA resubmission, business plans and objectives for UX111, expectations regarding the tolerability and safety of UX111, and future clinical and regulatory developments for UX111. Such forward-looking statements involve substantial risks and uncertainties that could cause our clinical development programs, collaboration with third parties, future results, performance or achievements to differ significantly from those expressed or implied by the forward-looking statements. Such risks and uncertainties include, among others, the uncertainty of clinical drug development and unpredictability and lengthy process for obtaining regulatory approvals, the ability of the company to successfully develop UX111, the Company’s ability to achieve its projected development goals in its expected timeframes, risks related to adverse side effects, risks related to reliance on third party partners to conduct certain activities on the company’s behalf, smaller than anticipated market opportunities for the Company’s products and product candidates, manufacturing risks, the Company’s limited experience in operating its own manufacturing facility, the ability of the Company and its third party manufacturers to comply with regulatory requirements, competition from other therapies or products, and other matters that could affect sufficiency of existing cash, cash equivalents and short-term investments to fund operations, the company’s future operating results and financial performance, the timing of clinical trial activities and reporting results from same, and the availability or commercial potential of Ultragenyx’s products and drug candidates. The Company undertakes no obligation to update or revise any forward-looking statements. For a further description of the risks and uncertainties that could cause actual results to differ from those expressed in these forward-looking statements, as well as risks relating to the business of the Company in general, see the Company's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission (SEC) on May 7, 2025, and its subsequent periodic reports filed with the SEC.

 

 

 


 

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.

 

 

 

Ultragenyx Pharmaceutical Inc.

 

 

 

 

Date:

July 11, 2025

By:

/s/ Howard Horn

 

 

 

Howard Horn
Executive Vice President, Chief Financial Officer, Corporate Strategy

 

 


FAQ

Why did the FDA issue a CRL to Ultragenyx (RARE) for UX111?

The FDA requested additional CMC information and remediation of facility inspection observations; no clinical data issues were cited.

Does the CRL affect the clinical efficacy of UX111?

No. The FDA acknowledged that neurodevelopmental outcome data are robust and requested only updated data for resubmission.

How long could UX111 approval be delayed?

Ultragenyx must first address CMC issues, then resubmit the BLA. The FDA review period after resubmission could take up to six months.

What is the financial impact of the FDA CRL on Ultragenyx?

The delay postpones potential revenue from UX111 and may increase manufacturing and compliance costs.

What are the next steps for Ultragenyx following the CRL?

The company will work with the FDA over the coming months to resolve observations and aims to resubmit the BLA once completed.
Ultragenyx Pharm

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