STOCK TITAN

[8-K] Prothena Corporation plc Reports Material Event

Filing Impact
(Moderate)
Filing Sentiment
(Neutral)
Form Type
8-K
Rhea-AI Filing Summary

On 6 Aug 2025, Prothena Corporation plc (PRTA) filed an 8-K under Item 8.01 to report that its partner Novo Nordisk has elected to advance the antibody coramitug into Phase 3 development for transthyretin amyloidosis with cardiomyopathy (ATTR-CM). The disclosure is limited to a brief statement and incorporates a press release attached as Exhibit 99.1; no financial results, milestone payments, trial design specifics, or timing details are provided. The only other exhibit is the Inline XBRL cover page file.

While the decision marks a significant clinical milestone for Prothena’s ATTR program and could represent a future value inflection point, investors do not receive additional quantitative data in this filing. Accordingly, the 8-K serves principally as formal notice of the program’s progression rather than a comprehensive business update.

Il 6 agosto 2025, Prothena Corporation plc (PRTA) ha presentato un 8-K ai sensi della voce 8.01 per comunicare che il suo partner Novo Nordisk ha deciso di avanzare l'anticorpo coramitug alla Fase 3 di sviluppo per l'amiloidosi da transtiretina con cardiomiopatia (ATTR-CM). La comunicazione si limita a una breve dichiarazione e include un comunicato stampa allegato come Exhibit 99.1; non sono forniti risultati finanziari, pagamenti di traguardi, dettagli sul disegno dello studio o tempistiche. L'unico altro allegato è la pagina di copertina Inline XBRL.

Pur rappresentando un importante traguardo clinico per il programma ATTR di Prothena e potenzialmente un punto di svolta in termini di valore futuro, gli investitori non ricevono dati quantitativi aggiuntivi in questa comunicazione. Di conseguenza, l'8-K funge principalmente da notifica formale del progresso del programma piuttosto che da aggiornamento completo sull'attività aziendale.

El 6 de agosto de 2025, Prothena Corporation plc (PRTA) presentó un 8-K bajo el punto 8.01 para informar que su socio Novo Nordisk ha decidido avanzar con el anticuerpo coramitug a la Fase 3 de desarrollo para la amiloidosis por transtiretina con miocardiopatía (ATTR-CM). La declaración es breve e incorpora un comunicado de prensa adjunto como Exhibit 99.1; no se proporcionan resultados financieros, pagos por hitos, detalles del diseño del ensayo ni fechas específicas. El único otro anexo es la portada Inline XBRL.

Aunque la decisión representa un hito clínico importante para el programa ATTR de Prothena y podría ser un punto de inflexión en su valor futuro, los inversores no reciben datos cuantitativos adicionales en este informe. Por lo tanto, el 8-K sirve principalmente como aviso formal del avance del programa y no como una actualización completa del negocio.

2025년 8월 6일, Prothena Corporation plc(PRTA)는 항목 8.01에 따라 8-K 보고서를 제출하여 파트너인 Novo Nordisk가 항체 coramitug를 심근병증을 동반한 트랜스티레틴 아밀로이드증(ATTR-CM) 치료를 위한 3상 개발 단계로 진전시키기로 결정했음을 알렸습니다. 공개 내용은 간단한 성명에 국한되며, Exhibit 99.1로 첨부된 보도자료를 포함합니다. 재무 결과, 마일스톤 지급, 임상시험 설계 세부사항 또는 일정에 관한 정보는 제공되지 않았습니다. 다른 첨부파일은 Inline XBRL 표지 파일뿐입니다.

이번 결정은 Prothena의 ATTR 프로그램에 중요한 임상적 이정표이며 향후 가치 전환점이 될 수 있지만, 투자자들은 이 보고서에서 추가적인 정량적 데이터를 받지 못합니다. 따라서 이번 8-K 보고서는 프로그램 진행에 대한 공식 통지 역할을 하며 포괄적인 사업 업데이트는 아닙니다.

Le 6 août 2025, Prothena Corporation plc (PRTA) a déposé un 8-K selon l'article 8.01 pour annoncer que son partenaire Novo Nordisk a choisi de faire avancer l’anticorps coramitug en phase 3 de développement pour l'amylose à transthyrétine avec cardiomyopathie (ATTR-CM). La communication se limite à une brève déclaration et inclut un communiqué de presse en annexe sous le numéro Exhibit 99.1 ; aucun résultat financier, paiement d’étape, détail du protocole d’essai ou calendrier n’est fourni. Le seul autre document joint est la page de couverture Inline XBRL.

Bien que cette décision représente une étape clinique majeure pour le programme ATTR de Prothena et puisse constituer un point d’inflexion en termes de valeur future, les investisseurs ne reçoivent pas de données quantitatives supplémentaires dans ce dépôt. Par conséquent, le 8-K sert principalement de notification formelle de la progression du programme plutôt que de mise à jour complète de l’activité.

Am 6. August 2025 reichte Prothena Corporation plc (PRTA) ein 8-K gemäß Punkt 8.01 ein, um mitzuteilen, dass sein Partner Novo Nordisk entschieden hat, den Antikörper coramitug in die Phase 3 der Entwicklung für Transthyretin-Amyloidose mit Kardiomyopathie (ATTR-CM) zu überführen. Die Bekanntgabe beschränkt sich auf eine kurze Erklärung und enthält eine Pressemitteilung als Anhang Exhibit 99.1; finanzielle Ergebnisse, Meilensteinzahlungen, Details zum Studiendesign oder Zeitpläne werden nicht angegeben. Das einzige weitere Exhibit ist die Inline XBRL-Titelseite.

Obwohl die Entscheidung einen wichtigen klinischen Meilenstein für das ATTR-Programm von Prothena darstellt und einen zukünftigen Wertwende-Punkt bedeuten könnte, erhalten Investoren in dieser Einreichung keine zusätzlichen quantitativen Daten. Dementsprechend dient das 8-K hauptsächlich als formelle Mitteilung über den Fortschritt des Programms und nicht als umfassendes Geschäftsupdate.

Positive
  • Novo Nordisk advancing coramitug to Phase 3 validates the program and moves Prothena’s ATTR franchise into late-stage development, a key catalyst.
Negative
  • No financial terms, timelines, or clinical data were disclosed, preventing investors from quantifying the economic impact or adjusting near-term projections.

Insights

TL;DR: Phase 3 go-ahead for coramitug is a clear clinical win; economic impact unknown due to absent milestone details.

Novo Nordisk’s decision to push coramitug into Phase 3 de-risks Prothena’s ATTR franchise and signals satisfactory Phase 2 data. The step typically triggers milestone payments and heightens eventual royalty prospects, but the 8-K omits any such figures, limiting near-term valuation modeling. Nevertheless, external validation from a large pharma partner reduces development risk and may improve market sentiment toward PRTA shares.

TL;DR: Filing is positive for pipeline momentum yet offers no financial metrics to adjust forecasts.

The advance to Phase 3 adds a late-stage asset to Prothena’s pipeline, enhancing optionality and potential M&A appeal. However, absent milestone disclosures mean immediate cash-flow estimates stay unchanged. Impact is therefore strategic rather than financial in the short term, keeping risk-reward skewed toward future trial outcomes.

Il 6 agosto 2025, Prothena Corporation plc (PRTA) ha presentato un 8-K ai sensi della voce 8.01 per comunicare che il suo partner Novo Nordisk ha deciso di avanzare l'anticorpo coramitug alla Fase 3 di sviluppo per l'amiloidosi da transtiretina con cardiomiopatia (ATTR-CM). La comunicazione si limita a una breve dichiarazione e include un comunicato stampa allegato come Exhibit 99.1; non sono forniti risultati finanziari, pagamenti di traguardi, dettagli sul disegno dello studio o tempistiche. L'unico altro allegato è la pagina di copertina Inline XBRL.

Pur rappresentando un importante traguardo clinico per il programma ATTR di Prothena e potenzialmente un punto di svolta in termini di valore futuro, gli investitori non ricevono dati quantitativi aggiuntivi in questa comunicazione. Di conseguenza, l'8-K funge principalmente da notifica formale del progresso del programma piuttosto che da aggiornamento completo sull'attività aziendale.

El 6 de agosto de 2025, Prothena Corporation plc (PRTA) presentó un 8-K bajo el punto 8.01 para informar que su socio Novo Nordisk ha decidido avanzar con el anticuerpo coramitug a la Fase 3 de desarrollo para la amiloidosis por transtiretina con miocardiopatía (ATTR-CM). La declaración es breve e incorpora un comunicado de prensa adjunto como Exhibit 99.1; no se proporcionan resultados financieros, pagos por hitos, detalles del diseño del ensayo ni fechas específicas. El único otro anexo es la portada Inline XBRL.

Aunque la decisión representa un hito clínico importante para el programa ATTR de Prothena y podría ser un punto de inflexión en su valor futuro, los inversores no reciben datos cuantitativos adicionales en este informe. Por lo tanto, el 8-K sirve principalmente como aviso formal del avance del programa y no como una actualización completa del negocio.

2025년 8월 6일, Prothena Corporation plc(PRTA)는 항목 8.01에 따라 8-K 보고서를 제출하여 파트너인 Novo Nordisk가 항체 coramitug를 심근병증을 동반한 트랜스티레틴 아밀로이드증(ATTR-CM) 치료를 위한 3상 개발 단계로 진전시키기로 결정했음을 알렸습니다. 공개 내용은 간단한 성명에 국한되며, Exhibit 99.1로 첨부된 보도자료를 포함합니다. 재무 결과, 마일스톤 지급, 임상시험 설계 세부사항 또는 일정에 관한 정보는 제공되지 않았습니다. 다른 첨부파일은 Inline XBRL 표지 파일뿐입니다.

이번 결정은 Prothena의 ATTR 프로그램에 중요한 임상적 이정표이며 향후 가치 전환점이 될 수 있지만, 투자자들은 이 보고서에서 추가적인 정량적 데이터를 받지 못합니다. 따라서 이번 8-K 보고서는 프로그램 진행에 대한 공식 통지 역할을 하며 포괄적인 사업 업데이트는 아닙니다.

Le 6 août 2025, Prothena Corporation plc (PRTA) a déposé un 8-K selon l'article 8.01 pour annoncer que son partenaire Novo Nordisk a choisi de faire avancer l’anticorps coramitug en phase 3 de développement pour l'amylose à transthyrétine avec cardiomyopathie (ATTR-CM). La communication se limite à une brève déclaration et inclut un communiqué de presse en annexe sous le numéro Exhibit 99.1 ; aucun résultat financier, paiement d’étape, détail du protocole d’essai ou calendrier n’est fourni. Le seul autre document joint est la page de couverture Inline XBRL.

Bien que cette décision représente une étape clinique majeure pour le programme ATTR de Prothena et puisse constituer un point d’inflexion en termes de valeur future, les investisseurs ne reçoivent pas de données quantitatives supplémentaires dans ce dépôt. Par conséquent, le 8-K sert principalement de notification formelle de la progression du programme plutôt que de mise à jour complète de l’activité.

Am 6. August 2025 reichte Prothena Corporation plc (PRTA) ein 8-K gemäß Punkt 8.01 ein, um mitzuteilen, dass sein Partner Novo Nordisk entschieden hat, den Antikörper coramitug in die Phase 3 der Entwicklung für Transthyretin-Amyloidose mit Kardiomyopathie (ATTR-CM) zu überführen. Die Bekanntgabe beschränkt sich auf eine kurze Erklärung und enthält eine Pressemitteilung als Anhang Exhibit 99.1; finanzielle Ergebnisse, Meilensteinzahlungen, Details zum Studiendesign oder Zeitpläne werden nicht angegeben. Das einzige weitere Exhibit ist die Inline XBRL-Titelseite.

Obwohl die Entscheidung einen wichtigen klinischen Meilenstein für das ATTR-Programm von Prothena darstellt und einen zukünftigen Wertwende-Punkt bedeuten könnte, erhalten Investoren in dieser Einreichung keine zusätzlichen quantitativen Daten. Dementsprechend dient das 8-K hauptsächlich als formelle Mitteilung über den Fortschritt des Programms und nicht als umfassendes Geschäftsupdate.

PROTHENA CORP PUBLIC LTD CO false 0001559053 0001559053 2025-08-06 2025-08-06
 
 

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): August 6, 2025

 

 

PROTHENA CORPORATION PUBLIC LIMITED COMPANY

(Exact name of registrant as specified in its charter)

 

 

 

Ireland   001-35676   98-1111119

(State or other jurisdiction of

incorporation)

 

(Commission

File Number)

 

(I.R.S. Employer

Identification Number)

 

77 Sir John Rogerson’s Quay, Block C
Grand Canal Docklands
Dublin 2, D02 VK60, Ireland
(Address of principal executive offices including Zip Code)

011-353-1-236-2500

(Registrant’s telephone number, including area code)

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

Ordinary Shares, par value $0.01 per share   PRTA   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 8.01

Other Events.

On August 6, 2025, Prothena Corporation plc (the “Company”) issued a press release announcing that the Company’s partner Novo Nordisk announced its decision to advance coramitug into Phase 3 development for ATTR amyloidosis with cardiomyopathy. A copy of that press release is attached as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

 

Item 9.01

Financial Statements and Exhibits

(d) Exhibits

 

Exhibit
No.
   Description
99.1    Press Release dated August 6, 2025
104    Cover Page Interactive Data File (embedded within the Inline XBRL document)


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.

 

    PROTHENA CORPORATION PLC
Dated: August 6, 2025     By:  

/s/ Tran B. Nguyen

    Name:   Tran B. Nguyen
    Title:   Chief Strategy Officer and Chief Financial Officer

FAQ

What did Prothena (PRTA) disclose in the 8-K filed on August 6 2025?

The company reported that partner Novo Nordisk will advance coramitug into Phase 3 for ATTR amyloidosis with cardiomyopathy.

Which drug is moving to Phase 3 development?

The antibody coramitug, targeting transthyretin amyloidosis with cardiomyopathy (ATTR-CM).

Who is Prothena’s partner for coramitug?

Global pharmaceutical company Novo Nordisk.

Did the filing mention any milestone payments or financial terms?

No. The 8-K contains no disclosure of milestone payments, royalties, or other financial details.

Where can investors access further information?

The full press release is attached as Exhibit 99.1 to the 8-K and is incorporated by reference.
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