PROTHENA CORP PUBLIC LTD CO false 0001559053 0001559053 2025-08-27 2025-08-27
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 27, 2025
PROTHENA CORPORATION PUBLIC LIMITED COMPANY
(Exact name of registrant as specified in its charter)
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| Ireland |
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001-35676 |
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98-1111119 |
| (State or other jurisdiction of incorporation) |
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(Commission File Number) |
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(I.R.S. Employer Identification Number) |
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| 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:
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Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) |
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Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) |
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Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) |
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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:
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Trading Symbol(s) |
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| Ordinary Shares, par value $0.01 per share |
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PRTA |
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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. ☐
On August 27, 2025, Prothena Corporation plc issued a press release announcing an update on its PRX012 investigational drug and results from the Phase 1 ASCENT clinical program. 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
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Exhibit
No. |
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Description |
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| 99.1 |
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Press Release dated August 27, 2025 |
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| 104 |
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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.
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PROTHENA CORPORATION PLC |
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| Dated: August 27, 2025 |
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By: |
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/s/ Tran B. Nguyen |
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Name: |
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Tran B. Nguyen |
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Title: |
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Chief Strategy Officer and Chief Financial Officer |
