Companies: 10,795·Total market cap: $144.5T
Prothena Corporation plc

Prothena Corporation plc

PRTANASDAQHealthcare● Active
$8.56
$-0.23(-2.62%)
Market Cap$448143709
P/E Ratio—
52W High$11.8
52W Low$4.76
SEC Filings

Prothena Corporation plc (PRTA) SEC Filings & 10-K Annual Reports

SEC EDGAR regulatory submissions (10-K, 10-Q, 8-K), latest forms, and full filing history — quick links to financials and earnings below.

SEC EDGAR · data.sec.gov · CIK 0001559053 · PRTA · NASDAQ · as of Jun 8, 2026

Filing snapshot

988
Total Filings
4
Latest Form
2026-06-05
Most Recent
2012
Filing Since
FinancialsEarningsView All on EDGAR

Source: SEC EDGAR (data.sec.gov) · CIK 0001559053 · Updated hourly · Not investment advice

Latest Annual Report

10-K · Annual ReportFY
Filed Date
2026-02-27
Fiscal Year End
Feb 27, 2026
Accession No.
0001559053-26-000008
Primary Document
prta-20251231.htm
View on SEC EDGARDownload PDFFiling Index
Source: data.sec.gov · CIK 0001559053 · Accession 0001559053-26-000008

Latest Key Filings

10-QQuarterly Report
10-Q
2026-05-07
View 10-Q on SEC
8-KCurrent Report
8-K
2026-05-15Material Event
View 8-K on SEC
Form 4Insider Activity
Ownership Change Disclosures

Executive & director trade disclosures. Full buy/sell sentiment analysis on the dedicated tab.

View Insider Trades Tab

SEC Filing History

Hide Form 4 / 144
8-KCurrent Report
8-K
2026-05-15
View
SCHEDULE 13G/ASCHEDULE 13G/A
SCHEDULE 13G/A
2026-05-15
View
3Initial Statement of Beneficial Ownership
PRIMARY DOCUMENT
2026-05-14
View
SCHEDULE 13G/ASCHEDULE 13G/A
SCHEDULE 13G/A
2026-05-11
View
10-QQuarterly Report
10-Q
2026-05-07
View
8-KCurrent Report
8-K
2026-05-07
View
3Initial Statement of Beneficial Ownership
Initial Statement of Beneficial Ownership
2026-04-10
View
ARSARS
ARS
2026-03-27
View
DEFA14AProxy Statement (Additional)
DEFA14A
2026-03-27
View
DEF 14AProxy Statement
DEF 14A
2026-03-27
View
EFFECTEFFECT
EFFECT
2026-03-02
View
8-KCurrent Report
8-K
2026-02-27
View
POS AMPOS AM
POS AM
2026-02-27
View
10-KAnnual Report
10-K
2026-02-27
View
POSASRPOSASR
POSASR
2026-02-27
View
Showing 1–15 of 527 filingsForm 4 / 144 hidden· 988 total in EDGAR

About SEC Filings & 10-K Annual Reports

Data source: SEC EDGAR (data.sec.gov)  |  Updated: Hourly  |  CIK: 0001559053  |  Exchange: NASDAQ · Healthcare

Prothena Corporation plc (NASDAQ: PRTA) has submitted 988 documents to the U.S. Securities and Exchange Commission (SEC) since its IPO in 2012. As a Healthcare sector company with CIK 0001559053, all filings are publicly accessible via the EDGAR database at no cost.

The annual 10-K report is Prothena Corporation plc's most comprehensive regulatory disclosure. The most recent Prothena Corporation plc 10-K was filed on 2026-02-27 for fiscal year ending 2026. Historical PRTA 10-K annual reports are available from 2012 through 2026.

Investors researching Prothena Corporation plc SEC filings can access 10-K annual reports, quarterly 10-Q reports, material event 8-K filings, and proxy statements directly from the links above. All documents are sourced from the official SEC EDGAR system.

Source: SEC EDGAR · data.sec.gov · SEC Form 10-K · SEC Form 10-Q · SEC Form 8-K2026-06-08
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→ PRTA Financials→ PRTA Earnings→ PRTA Insider Trades

Frequently Asked Questions

PRTA SEC Filings · 8 questions

Prothena Corporation plc (PRTA) SEC filings are publicly available on this page and on the official SEC EDGAR database at sec.gov. You can browse all 988 filings and access original documents at no cost. Prothena Corporation plc's CIK is 0001559053.

PRTA SEC filingsProthena Corporation plc SEC documentsfind PRTA 10-K