Official SEC submissions

Prothena SEC Filings

Prothena (PRTA) SEC filings, periodic reports and insider submissions.

Direct answer

Prothena's latest SEC filing is 4.

It was filed on August 21, 2026, and 40 recent filings are available.
Each row links directly to the SEC document and filing index.
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Recent SEC filings

4

Insider transaction

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4

Insider transaction

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4

Insider transaction

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4

Insider transaction

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10-Q

Periodic report

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10-Q

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8-K

Current report

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8-K

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4

Insider transaction

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FORM 4

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4

Insider transaction

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FORM 4

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4

Insider transaction

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FORM 4

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4

Insider transaction

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FORM 4

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4

Insider transaction

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FORM 4

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4

Insider transaction

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FORM 4

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4

Insider transaction

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FORM 4

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4

Insider transaction

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FORM 4

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144

Planned securities sale

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144

Planned securities sale

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4

Insider transaction

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4

Insider transaction

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4

Insider transaction

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PRIMARY DOCUMENT

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144

Planned securities sale

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4

Insider transaction

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PRIMARY DOCUMENT

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4

Insider transaction

Filed:

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4

Insider transaction

Filed:

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PRIMARY DOCUMENT

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4

Insider transaction

Filed:

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4

Insider transaction

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4

Insider transaction

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4

Insider transaction

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4

Insider transaction

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4

Insider transaction

Filed:

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8-K

Current report

Filed:

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8-K

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10-Q

Periodic report

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10-Q

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8-K

Current report

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8-K

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4

Insider transaction

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DEFA14A

Proxy statement

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DEFA14A

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DEF 14A

Proxy statement

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DEF 14A

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4

Insider transaction

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4

Insider transaction

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4

Insider transaction

Filed:

Report date:

Open SEC documentView filing index

4

Insider transaction

Filed:

Report date:

Open SEC documentView filing index

4

Insider transaction

Filed:

Report date:

Open SEC documentView filing index

Verified data

Recent filing categories
5
Recent filings
40
SEC CIK
0001559053
Latest filing date
August 21, 2026

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