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Prothena Corp. Public Ltd Co. (PRTA)

Prothena Corp. Public Ltd Co. (PRTA) Insider Trading

Directors, officers and holders of more than 10% of PRTA report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.

Recent Form 4 transactions

The 50 most recent of 103 transactions on file: 19 with code P, 2 with code S and 29 with other codes.

DateInsiderCodeShares
Oct 27, 2026SCULLY WILLIAM PG Gift566,444
Oct 23, 2026SCULLY WILLIAM PP Purchase50,000
Oct 22, 2026SCULLY WILLIAM PP Purchase100,000
Oct 14, 2026SCULLY WILLIAM PP Purchase10,000
Oct 13, 2026SCULLY WILLIAM PP Purchase100,000
Oct 8, 2026SCULLY WILLIAM PP Purchase90,000
Oct 7, 2026SCULLY WILLIAM PP Purchase125,000
Oct 2, 2026SCULLY WILLIAM PP Purchase100,000
Sep 29, 2026SCULLY WILLIAM PP Purchase162,000
Sep 28, 2026SCULLY WILLIAM PP Purchase103,500
Sep 18, 2026SCULLY WILLIAM PP Purchase100,000
Sep 2, 2026SCULLY WILLIAM PP Purchase27,000
Aug 20, 2026SCULLY WILLIAM PP Purchase50,000
Aug 18, 2026SCULLY WILLIAM PG Gift627,553
Aug 17, 2026SCULLY WILLIAM PG Gift336,000
Aug 10, 2026SCULLY WILLIAM PG Gift251,553
Aug 7, 2026SCULLY WILLIAM PP Purchase3,500
Aug 7, 2026SCULLY WILLIAM PP Purchase34,000
Jul 29, 2026Kingston Anne EvansS Sale7,662
Jul 29, 2026Isaacs Michael JohnS Sale8,386
Jul 28, 2026Smith Brandon S.D Disposition78,000
Jul 28, 2026Nguyen TranM Exercise57,000
Jul 28, 2026Kingston Anne EvansF Tax Payment3,498
Jul 28, 2026Walker Karin LD Disposition15,000
Jul 28, 2026Swanson Chad J.M Exercise51,000
Jul 28, 2026Zago Wagner M.M Exercise51,000
Jul 28, 2026Kinney Gene G.M Exercise84,000
Jul 28, 2026Smith Brandon S.M Exercise78,000
Jul 28, 2026Zago Wagner M.D Disposition51,000
Jul 28, 2026Zago Wagner M.M Exercise51,000
Jul 28, 2026Swanson Chad J.F Tax Payment3,467
Jul 28, 2026Nguyen TranD Disposition57,000
Jul 28, 2026Kinney Gene G.M Exercise84,000
Jul 28, 2026Walker Karin LM Exercise15,000
Jul 28, 2026Smith Brandon S.M Exercise78,000
Jul 28, 2026Nguyen TranM Exercise57,000
Jul 28, 2026Isaacs Michael JohnF Tax Payment4,694
Jul 28, 2026Walker Karin LM Exercise15,000
Jul 28, 2026Kinney Gene G.D Disposition84,000
Jul 28, 2026Swanson Chad J.D Disposition40,800
Jul 28, 2026Swanson Chad J.M Exercise51,000
Jun 16, 2026SCULLY WILLIAM PP Purchase20,000
Jun 15, 2026SCULLY WILLIAM PG Gift325,000
Jun 11, 2026SCULLY WILLIAM PP Purchase125,000
Jun 4, 2026SCULLY WILLIAM PP Purchase50,000
Jun 2, 2026SCULLY WILLIAM PP Purchase50,000
May 22, 2026SCULLY WILLIAM PP Purchase100,000
May 15, 2026COLLIER RICHARD TA Award27,000
May 15, 2026Ekman LarsA Award27,000
May 15, 2026Dunn William H. Jr.A Award27,000

The full Form 4 history is on the PRTA company page (Insider Trades card, View all).

Questions about this data

Which insider transactions are open-market trades?

Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.

How quickly are insider trades reported?

A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.

Who has to file Form 4?

Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.

Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.