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Nasdaq · USD

PRTA

PROTHENA CORP PUBLIC LTD CO

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Tapewire entity
2375
SEC CIK
0001559053
Parsed reports
372

Last 12 months

Inside the activity.

15 purchase rows · 2 sale rows

Disclosed non-derivative P/S rows, by transaction month. Includes amendments and private transactions.
Monthly counts
MonthPurchasesSales
Nov 202500
Dec 202500
Jan 202600
Feb 202600
Mar 202600
Apr 202600
May 202610
Jun 202640
Jul 202602
Aug 202630
Sep 202640
Oct 202630

Latest available

Insider transactions

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Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction dateOwner / reported roleActivity / securityShares / unitsReported priceReported valueDetails
March 03, 2026 Filed Mar 5, 2026 21:50 UTC
Smith Brandon S.Chief Operating Officer
GrantStock Option (Right to Buy) · Derivative 190,000 $0.00 Strike: $9.36 $0.00
Disclosure

SEC source: 0000905148-26-001179 · form4.xml · derivative · entry 1

Smith Brandon S. · CIK 0001805226 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 190,000

Underlying: Ordinary Shares · 190,000 shares

Expires 2036-03-03

F1 · derivative.exercise_date: The shares subject to the option will vest and become exercisable as to 25% of the total number of shares subject to the option on March 3, 2027, and with respect to 1/48th of the total number of shares subject to the option in successive, equal monthly installments on each monthly anniversary thereafter, subject to the Reporting Person's continued employment with the Issuer on each such vesting date.

Read SEC document
March 03, 2026 Filed Mar 5, 2026 21:51 UTC
Zago Wagner M.Chief Scientific Officer
GrantStock Option (Right to Buy) · Derivative 190,000 $0.00 Strike: $9.36 $0.00
Disclosure

SEC source: 0000905148-26-001182 · form4.xml · derivative · entry 1

Zago Wagner M. · CIK 0001708681 · Chief Scientific Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 190,000

Underlying: Ordinary Shares · 190,000 shares

Expires 2036-03-03

F1 · derivative.exercise_date: The shares subject to the option will vest and become exercisable as to 25% of the total number of shares subject to the option on March 3, 2027, and with respect to 1/48th of the total number of shares subject to the option in successive, equal monthly installments on each monthly anniversary thereafter, subject to the Reporting Person's continued employment with the Issuer on each such vesting date.

Read SEC document
March 03, 2026 Filed Mar 5, 2026 21:50 UTC
Nguyen TranChief Strategy Officer and CFO
GrantStock Option (Right to Buy) · Derivative 230,000 $0.00 Strike: $9.36 $0.00
Disclosure

SEC source: 0000905148-26-001178 · form4.xml · derivative · entry 1

Nguyen Tran · CIK 0001457013 · Chief Strategy Officer and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 230,000

Underlying: Ordinary Shares · 230,000 shares

Expires 2036-03-03

F1 · derivative.exercise_date: The shares subject to the option will vest and become exercisable as to 25% of the total number of shares subject to the option on March 3, 2027, and with respect to 1/48th of the total number of shares subject to the option in successive, equal monthly installments on each monthly anniversary thereafter, subject to the Reporting Person's continued employment with the Issuer on each such vesting date.

Read SEC document
March 03, 2026 Filed Mar 5, 2026 21:51 UTC
Walker Karin LChief Accounting Officer
GrantStock Option (Right to Buy) · Derivative 150,000 $0.00 Strike: $9.36 $0.00
Disclosure

SEC source: 0000905148-26-001181 · form4.xml · derivative · entry 1

Walker Karin L · CIK 0001559422 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 150,000

Underlying: Ordinary Shares · 150,000 shares

Expires 2036-03-03

F1 · derivative.exercise_date: The shares subject to the option will vest and become exercisable as to 25% of the total number of shares subject to the option on March 3, 2027, and with respect to 1/48th of the total number of shares subject to the option in successive, equal monthly installments on each monthly anniversary thereafter, subject to the Reporting Person's continued employment with the Issuer on each such vesting date.

Read SEC document
March 03, 2026 Filed Mar 5, 2026 21:50 UTC
Malecek Michael JChief Legal Officer
GrantStock Option (Right to Buy) · Derivative 190,000 $0.00 Strike: $9.36 $0.00
Disclosure

SEC source: 0000905148-26-001177 · form4.xml · derivative · entry 1

Malecek Michael J · CIK 0001779336 · Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 190,000

Underlying: Ordinary Shares · 190,000 shares

Expires 2036-03-03

F1 · derivative.exercise_date: The shares subject to the option will vest and become exercisable as to 25% of the total number of shares subject to the option on March 3, 2027, and with respect to 1/48th of the total number of shares subject to the option in successive, equal monthly installments on each monthly anniversary thereafter, subject to the Reporting Person's continued employment with the Issuer on each such vesting date.

Read SEC document
March 03, 2026 Filed Mar 5, 2026 21:49 UTC
Kinney Gene G.Director · President and CEO
GrantStock Option (Right to Buy) · Derivative 520,000 $0.00 Strike: $9.36 $0.00
Disclosure

SEC source: 0000905148-26-001176 · form4.xml · derivative · entry 1

Kinney Gene G. · CIK 0001564380 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 520,000

Underlying: Ordinary Shares · 520,000 shares

Expires 2036-03-03

F1 · derivative.exercise_date: The shares subject to the option will vest and become exercisable as to 25% of the total number of shares subject to the option on March 3, 2027, and with respect to 1/48th of the total number of shares subject to the option in successive, equal monthly installments on each monthly anniversary thereafter, subject to the Reporting Person's continued employment with the Issuer on each such vesting date.

Read SEC document
July 28, 2025 Filed Jul 30, 2025 21:52 UTC
Swanson Chad J.Chief Development Officer
GrantOrdinary Shares, par value $0.01 per share 85,000 $0.00 $0.00
Disclosure

SEC source: 0000905148-25-002660 · form4.xml · nonDerivative · entry 1

Swanson Chad J. · CIK 0002038509 · Chief Development Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 85,000

Read SEC document
July 28, 2025 Filed Jul 30, 2025 21:51 UTC
Smith Brandon S.Chief Operating Officer
GrantOrdinary Shares, par value $0.01 per share 130,000 $0.00 $0.00
Disclosure

SEC source: 0000905148-25-002659 · form4.xml · nonDerivative · entry 1

Smith Brandon S. · CIK 0001805226 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 130,000

Read SEC document
July 28, 2025 Filed Jul 30, 2025 21:52 UTC
Zago Wagner M.Chief Scientific Officer
GrantOrdinary Shares, par value $0.01 per share 85,000 $0.00 $0.00
Disclosure

SEC source: 0000905148-25-002662 · form4.xml · nonDerivative · entry 1

Zago Wagner M. · CIK 0001708681 · Chief Scientific Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 85,000

Read SEC document
July 28, 2025 Filed Jul 30, 2025 21:51 UTC
Nguyen TranChief Strategy Officer and CFO
GrantOrdinary Shares, par value $0.01 per share 95,000 $0.00 $0.00
Disclosure

SEC source: 0000905148-25-002658 · form4.xml · nonDerivative · entry 1

Nguyen Tran · CIK 0001457013 · Chief Strategy Officer and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 97,205

Read SEC document
July 28, 2025 Filed Jul 30, 2025 21:52 UTC
Walker Karin LChief Accounting Officer
GrantOrdinary Shares, par value $0.01 per share 25,000 $0.00 $0.00
Disclosure

SEC source: 0000905148-25-002661 · form4.xml · nonDerivative · entry 1

Walker Karin L · CIK 0001559422 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,000

Read SEC document
July 28, 2025 Filed Jul 30, 2025 21:51 UTC
Malecek Michael JChief Legal Officer
GrantOrdinary Shares, par value $0.01 per share 80,000 $0.00 $0.00
Disclosure

SEC source: 0000905148-25-002657 · form4.xml · nonDerivative · entry 1

Malecek Michael J · CIK 0001779336 · Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 80,000

Read SEC document
July 28, 2025 Filed Jul 30, 2025 21:50 UTC
Kinney Gene G.Director · President and CEO
GrantOrdinary Shares, par value $0.01 per share 140,000 $0.00 $0.00
Disclosure

SEC source: 0000905148-25-002656 · form4.xml · nonDerivative · entry 1

Kinney Gene G. · CIK 0001564380 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 152,793

Read SEC document
May 14, 2025 Filed May 16, 2025 20:46 UTC GrantStock Option (Right to Buy) · Derivative 20,183 $0.00 Strike: $6.89 $0.00
Disclosure

SEC source: 0000905148-25-001827 · form4.xml · derivative · entry 1

COLLIER RICHARD T · CIK 0001110751 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,183

Underlying: Ordinary Shares · 20,183 shares

Expires 2035-05-14

F1 · derivative.exercise_date: The shares subject to the option will vest and become exercisable as to 100% of the total number of shares subject to the option on the earlier of the first anniversary of the grant date or the day of the annual general meeting in 2026 of the Issuer's shareholders, assuming continuous service as a director until such vesting date.

Read SEC document
May 14, 2025 Filed May 16, 2025 16:52 UTC GrantStock Option (Right to Buy) · Derivative 20,183 $0.00 Strike: $6.89 $0.00
Disclosure

SEC source: 0000905148-25-001832 · form4.xml · derivative · entry 1

Kim Helen Susan · CIK 0001422772 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,183

Underlying: Ordinary Shares · 20,183 shares

Expires 2035-05-14

F1 · derivative.exercise_date: The shares subject to the option will vest and become exercisable as to 100% of the total number of shares subject to the option on the earlier of the first anniversary of the grant date or the day of the annual general meeting in 2026 of the Issuer's shareholders, assuming continuous service as a director until such vesting date.

Read SEC document
May 14, 2025 Filed May 16, 2025 20:57 UTC GrantStock Option (Right to Buy) · Derivative 20,183 $0.00 Strike: $6.89 $0.00
Disclosure

SEC source: 0000905148-25-001836 · form4.xml · derivative · entry 1

WELCH DANIEL G · CIK 0001206199 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,183

Underlying: Ordinary Shares · 20,183 shares

Expires 2035-05-14

F1 · derivative.exercise_date: The shares subject to the option will vest and become exercisable as to 100% of the total number of shares subject to the option on the earlier of the first anniversary of the grant date or the day of the annual general meeting in 2026 of the Issuer's shareholders, assuming continuous service as a director until such vesting date.

Read SEC document
May 14, 2025 Filed May 16, 2025 20:51 UTC
Ekman LarsDirector
GrantStock Option (Right to Buy) · Derivative 20,183 $0.00 Strike: $6.89 $0.00
Disclosure

SEC source: 0000905148-25-001831 · form4.xml · derivative · entry 1

Ekman Lars · CIK 0001376117 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,183

Underlying: Ordinary Shares · 20,183 shares

Expires 2035-05-14

F1 · derivative.exercise_date: The shares subject to the option will vest and become exercisable as to 100% of the total number of shares subject to the option on the earlier of the first anniversary of the grant date or the day of the annual general meeting in 2026 of the Issuer's shareholders, assuming continuous service as a director until such vesting date.

Read SEC document
May 14, 2025 Filed May 16, 2025 20:47 UTC
Cooke ShaneDirector
GrantStock Option (Right to Buy) · Derivative 20,183 $0.00 Strike: $6.89 $0.00
Disclosure

SEC source: 0000905148-25-001829 · form4.xml · derivative · entry 1

Cooke Shane · CIK 0001524823 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,183

Underlying: Ordinary Shares · 20,183 shares

Expires 2035-05-14

F1 · derivative.exercise_date: The shares subject to the option will vest and become exercisable as to 100% of the total number of shares subject to the option on the earlier of the first anniversary of the grant date or the day of the annual general meeting in 2026 of the Issuer's shareholders, assuming continuous service as a director until such vesting date.

Read SEC document
May 14, 2025 Filed May 16, 2025 20:54 UTC GrantStock Option (Right to Buy) · Derivative 20,183 $0.00 Strike: $6.89 $0.00
Disclosure

SEC source: 0000905148-25-001835 · form4.xml · derivative · entry 1

Selkoe Dennis J. · CIK 0001582306 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,183

Underlying: Ordinary Shares · 20,183 shares

Expires 2035-05-14

F1 · derivative.exercise_date: The shares subject to the option will vest and become exercisable as to 100% of the total number of shares subject to the option on the earlier of the first anniversary of the grant date or the day of the annual general meeting in 2026 of the Issuer's shareholders, assuming continuous service as a director until such vesting date.

Read SEC document
May 14, 2025 Filed May 16, 2025 20:48 UTC GrantStock Option (Right to Buy) · Derivative 20,183 $0.00 Strike: $6.89 $0.00
Disclosure

SEC source: 0000905148-25-001830 · form4.xml · derivative · entry 1

Dunn William H. Jr. · CIK 0001977655 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,183

Underlying: Ordinary Shares · 20,183 shares

Expires 2035-05-14

F1 · derivative.exercise_date: The shares subject to the option will vest and become exercisable as to 100% of the total number of shares subject to the option on the earlier of the first anniversary of the grant date or the day of the annual general meeting in 2026 of the Issuer's shareholders, assuming continuous service as a director until such vesting date.

Read SEC document
May 14, 2025 Filed May 16, 2025 20:44 UTC
Cobb Paula KDirector
GrantStock Option (Right to Buy) · Derivative 20,183 $0.00 Strike: $6.89 $0.00
Disclosure

SEC source: 0000905148-25-001826 · form4.xml · derivative · entry 1

Cobb Paula K · CIK 0001763372 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,183

Underlying: Ordinary Shares · 20,183 shares

Expires 2035-05-14

F1 · derivative.exercise_date: The shares subject to the option will vest and become exercisable as to 100% of the total number of shares subject to the option on the earlier of the first anniversary of the grant date or the day of the annual general meeting in 2026 of the Issuer's shareholders, assuming continuous service as a director until such vesting date.

Read SEC document
May 06, 2025 Filed May 6, 2025 23:06 UTC SaleOrdinary Shares 1,984,053 $7.64 $15,164,712.29
Disclosure

SEC source: 0000935836-25-000309 · ownership.xml · nonDerivative · entry 3

EcoR1 Capital, LLC · CIK 0001587114 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See Note

Disclosed balance after: 5,304,596

F8 · shares: Qualified Fund sold 1,859,851 of the shares sold in this transaction.

F9 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $7.4637 to $8.5939, inclusive.

F10 · balance_after: After this transaction, Qualified Fund held 4,973,891 of the Issuer's Ordinary Shares.

F1 · ownership.nature: The reporting persons are EcoR1 Capital, LLC ("Ecor1"), Oleg Nodelman and EcoR1 Capital Fund Qualified, L.P. ("Qualified Fund"). EcoR1 is the general partner and investment adviser of private funds, including Qualified Fund (the "Fund"). Mr. Nodelman is the manager and controlling owner of EcoR1. EcoR1 is filing this Form 4 for itself, Mr. Nodelman and Qualified Fund. The filers are filing this Form 4 jointly, but not as a group, and each expressly disclaims membership in a group within the meaning of Rule 13d-5(b) under the Securities Exchange Act of 1934. The Funds hold these securities directly for the benefit of their investors. EcoR1 may be deemed to indirectly beneficially own them as the investment adviser to the Funds. Mr. Nodelman may be deemed to indirectly beneficially own them as the control person of EcoR1. The filers disclaim beneficial ownership of the securities except to the extent of their respective pecuniary interests therein.

Read SEC document
May 05, 2025 Filed May 6, 2025 23:06 UTC SaleOrdinary Shares 977,693 $8.11 $7,930,165.69
Disclosure

SEC source: 0000935836-25-000309 · ownership.xml · nonDerivative · entry 2

EcoR1 Capital, LLC · CIK 0001587114 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See Note

Disclosed balance after: 7,288,649

F5 · shares: Qualified Fund sold 916,492 of the shares of sold in this transaction.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $8.1097 to $8.1972, inclusive.

F7 · balance_after: After this transaction, Qualified Fund held 6,833,742 shares of the Issuer's Common Stock

F1 · ownership.nature: The reporting persons are EcoR1 Capital, LLC ("Ecor1"), Oleg Nodelman and EcoR1 Capital Fund Qualified, L.P. ("Qualified Fund"). EcoR1 is the general partner and investment adviser of private funds, including Qualified Fund (the "Fund"). Mr. Nodelman is the manager and controlling owner of EcoR1. EcoR1 is filing this Form 4 for itself, Mr. Nodelman and Qualified Fund. The filers are filing this Form 4 jointly, but not as a group, and each expressly disclaims membership in a group within the meaning of Rule 13d-5(b) under the Securities Exchange Act of 1934. The Funds hold these securities directly for the benefit of their investors. EcoR1 may be deemed to indirectly beneficially own them as the investment adviser to the Funds. Mr. Nodelman may be deemed to indirectly beneficially own them as the control person of EcoR1. The filers disclaim beneficial ownership of the securities except to the extent of their respective pecuniary interests therein.

Read SEC document
May 02, 2025 Filed May 6, 2025 23:06 UTC SaleOrdinary Shares 3,317,938 $8.36 $27,744,929.35
Disclosure

SEC source: 0000935836-25-000309 · ownership.xml · nonDerivative · entry 1

EcoR1 Capital, LLC · CIK 0001587114 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See Note

Disclosed balance after: 8,266,342

F2 · shares: Qualified Fund sold 3,097,619 of the shares sold in this transaction.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $8.2715 to $9.1789, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission upon request, full information regarding the number of shares sold at each seperate price within the ranges set forth in this footnote and footnotes 6 and 9.

F4 · balance_after: After this transaction, Qualified Fund held 7,750,234 shares of the Issuer's Common Stock.

F1 · ownership.nature: The reporting persons are EcoR1 Capital, LLC ("Ecor1"), Oleg Nodelman and EcoR1 Capital Fund Qualified, L.P. ("Qualified Fund"). EcoR1 is the general partner and investment adviser of private funds, including Qualified Fund (the "Fund"). Mr. Nodelman is the manager and controlling owner of EcoR1. EcoR1 is filing this Form 4 for itself, Mr. Nodelman and Qualified Fund. The filers are filing this Form 4 jointly, but not as a group, and each expressly disclaims membership in a group within the meaning of Rule 13d-5(b) under the Securities Exchange Act of 1934. The Funds hold these securities directly for the benefit of their investors. EcoR1 may be deemed to indirectly beneficially own them as the investment adviser to the Funds. Mr. Nodelman may be deemed to indirectly beneficially own them as the control person of EcoR1. The filers disclaim beneficial ownership of the securities except to the extent of their respective pecuniary interests therein.

Read SEC document
March 05, 2025 Filed Mar 7, 2025 21:45 UTC
Swanson Chad J.Chief Development Officer
GrantStock Option (Right to Buy) · Derivative 107,500 $0.00 Strike: $14.95 $0.00
Disclosure

SEC source: 0000905148-25-000888 · form4.xml · derivative · entry 1

Swanson Chad J. · CIK 0002038509 · Chief Development Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 107,500

Underlying: Ordinary Shares · 107,500 shares

Expires 2035-03-05

F1 · derivative.exercise_date: The shares subject to the option will vest and become exercisable as to 25% of the total number of shares subject to the option on March 5, 2026, and with respect to 1/48th of the total number of shares subject to the option in successive, equal monthly installments on each monthly anniversary thereafter, subject to the Reporting Person's continued employment with the Issuer on each such vesting date.

Read SEC document
March 05, 2025 Filed Mar 7, 2025 21:41 UTC
Smith Brandon S.Chief Operating Officer
GrantStock Option (Right to Buy) · Derivative 107,500 $0.00 Strike: $14.95 $0.00
Disclosure

SEC source: 0000905148-25-000887 · form4.xml · derivative · entry 1

Smith Brandon S. · CIK 0001805226 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 107,500

Underlying: Ordinary Shares · 107,500 shares

Expires 2035-03-05

F1 · derivative.exercise_date: The shares subject to the option will vest and become exercisable as to 25% of the total number of shares subject to the option on March 5, 2026, and with respect to 1/48th of the total number of shares subject to the option in successive, equal monthly installments on each monthly anniversary thereafter, subject to the Reporting Person's continued employment with the Issuer on each such vesting date.

Read SEC document
March 05, 2025 Filed Mar 7, 2025 21:51 UTC
Zago Wagner M.Chief Scientific Officer
GrantStock Option (Right to Buy) · Derivative 107,500 $0.00 Strike: $14.95 $0.00
Disclosure

SEC source: 0000905148-25-000890 · form4.xml · derivative · entry 1

Zago Wagner M. · CIK 0001708681 · Chief Scientific Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 107,500

Underlying: Ordinary Shares · 107,500 shares

Expires 2035-03-05

F1 · derivative.exercise_date: The shares subject to the option will vest and become exercisable as to 25% of the total number of shares subject to the option on March 5, 2026, and with respect to 1/48th of the total number of shares subject to the option in successive, equal monthly installments on each monthly anniversary thereafter, subject to the Reporting Person's continued employment with the Issuer on each such vesting date.

Read SEC document
March 05, 2025 Filed Mar 7, 2025 16:28 UTC
Karp Carol D.Chief Regulatory Officer
GrantStock Option (Right to Buy) · Derivative 107,500 $0.00 Strike: $14.95 $0.00
Disclosure

SEC source: 0000905148-25-000882 · form4.xml · derivative · entry 1

Karp Carol D. · CIK 0001692214 · Chief Regulatory Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 107,500

Underlying: Ordinary Shares · 107,500 shares

Expires 2035-03-05

F1 · derivative.exercise_date: The shares subject to the option will vest and become exercisable as to 25% of the total number of shares subject to the option on March 5, 2026, and with respect to 1/48th of the total number of shares subject to the option in successive, equal monthly installments on each monthly anniversary thereafter, subject to the Reporting Person's continued employment with the Issuer on each such vesting date.

Read SEC document
March 05, 2025 Filed Mar 7, 2025 21:37 UTC
Nguyen TranChief Strategy Officer and CFO
GrantStock Option (Right to Buy) · Derivative 107,500 $0.00 Strike: $14.95 $0.00
Disclosure

SEC source: 0000905148-25-000886 · form4.xml · derivative · entry 1

Nguyen Tran · CIK 0001457013 · Chief Strategy Officer and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 107,500

Underlying: Ordinary Shares · 107,500 shares

Expires 2035-03-05

F1 · derivative.exercise_date: The shares subject to the option will vest and become exercisable as to 25% of the total number of shares subject to the option on March 5, 2026, and with respect to 1/48th of the total number of shares subject to the option in successive, equal monthly installments on each monthly anniversary thereafter, subject to the Reporting Person's continued employment with the Issuer on each such vesting date.

Read SEC document
March 05, 2025 Filed Mar 7, 2025 21:46 UTC
Walker Karin LChief Accounting Officer
GrantStock Option (Right to Buy) · Derivative 70,000 $0.00 Strike: $14.95 $0.00
Disclosure

SEC source: 0000905148-25-000889 · form4.xml · derivative · entry 1

Walker Karin L · CIK 0001559422 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 70,000

Underlying: Ordinary Shares · 70,000 shares

Expires 2035-03-05

F1 · derivative.exercise_date: The shares subject to the option will vest and become exercisable as to 25% of the total number of shares subject to the option on March 5, 2026, and with respect to 1/48th of the total number of shares subject to the option in successive, equal monthly installments on each monthly anniversary thereafter, subject to the Reporting Person's continued employment with the Issuer on each such vesting date.

Read SEC document
March 05, 2025 Filed Mar 7, 2025 21:36 UTC
Malecek Michael JChief Legal Officer
GrantStock Option (Right to Buy) · Derivative 107,500 $0.00 Strike: $14.95 $0.00
Disclosure

SEC source: 0000905148-25-000885 · form4.xml · derivative · entry 1

Malecek Michael J · CIK 0001779336 · Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 107,500

Underlying: Ordinary Shares · 107,500 shares

Expires 2035-03-05

F1 · derivative.exercise_date: The shares subject to the option will vest and become exercisable as to 25% of the total number of shares subject to the option on March 5, 2026, and with respect to 1/48th of the total number of shares subject to the option in successive, equal monthly installments on each monthly anniversary thereafter, subject to the Reporting Person's continued employment with the Issuer on each such vesting date.

Read SEC document
March 05, 2025 Filed Mar 7, 2025 21:30 UTC
Kinney Gene G.Director · President and CEO
GrantStock Option (Right to Buy) · Derivative 375,000 $0.00 Strike: $14.95 $0.00
Disclosure

SEC source: 0000905148-25-000884 · form4.xml · derivative · entry 1

Kinney Gene G. · CIK 0001564380 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 375,000

Underlying: Ordinary Shares · 375,000 shares

Expires 2035-03-05

F1 · derivative.exercise_date: The shares subject to the option will vest and become exercisable as to 25% of the total number of shares subject to the option on March 5, 2026, and with respect to 1/48th of the total number of shares subject to the option in successive, equal monthly installments on each monthly anniversary thereafter, subject to the Reporting Person's continued employment with the Issuer on each such vesting date.

Read SEC document
March 05, 2025 Filed Mar 7, 2025 21:24 UTC
Ford David AChief People Officer
GrantStock Option (Right to Buy) · Derivative 107,500 $0.00 Strike: $14.95 $0.00
Disclosure

SEC source: 0000905148-25-000881 · form4.xml · derivative · entry 1

Ford David A · CIK 0001705295 · Chief People Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 107,500

Underlying: Ordinary Shares · 107,500 shares

Expires 2035-03-05

F1 · derivative.exercise_date: The shares subject to the option will vest and become exercisable as to 25% of the total number of shares subject to the option on March 5, 2026, and with respect to 1/48th of the total number of shares subject to the option in successive, equal monthly installments on each monthly anniversary thereafter, subject to the Reporting Person's continued employment with the Issuer on each such vesting date.

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January 15, 2025 Filed May 2, 2025 14:29 UTC GiftOrdinary Shares, par value $0.01 per share 12,000 $0.00 $0.00
Disclosure

SEC source: 0000950170-25-062317 · ownership.xml · nonDerivative · entry 13

SCULLY WILLIAM P · CIK 0001045463 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Spouse

Disclosed balance after: 47,000

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January 14, 2025 Filed May 2, 2025 14:29 UTC PurchaseOrdinary Shares, par value $0.01 per share 100,000 $12.79 $1,279,040.00
Disclosure

SEC source: 0000950170-25-062317 · ownership.xml · nonDerivative · entry 11

SCULLY WILLIAM P · CIK 0001045463 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 735,993

F3 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $12.41 to $12.94, inclusive.

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January 03, 2025 Filed May 2, 2025 14:29 UTC GiftOrdinary Shares, par value $0.01 per share 1,000 $0.00 $0.00
Disclosure

SEC source: 0000950170-25-062317 · ownership.xml · nonDerivative · entry 10

SCULLY WILLIAM P · CIK 0001045463 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 635,993

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January 02, 2025 Filed May 2, 2025 14:29 UTC GiftOrdinary Shares, par value $0.01 per share 13,200 $0.00 $0.00
Disclosure

SEC source: 0000950170-25-062317 · ownership.xml · nonDerivative · entry 9

SCULLY WILLIAM P · CIK 0001045463 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 636,993

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December 31, 2024 Filed May 2, 2025 14:29 UTC PurchaseOrdinary Shares, par value $0.01 per share 30,000 $12.99 $389,640.00
Disclosure

SEC source: 0000950170-25-062317 · ownership.xml · nonDerivative · entry 8

SCULLY WILLIAM P · CIK 0001045463 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 650,193

F2 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $12.93 to $13.07, inclusive.

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December 31, 2024 Filed May 2, 2025 14:29 UTC PurchaseOrdinary Shares, par value $0.01 per share 800 $13.39 $10,715.20
Disclosure

SEC source: 0000950170-25-062317 · ownership.xml · nonDerivative · entry 7

SCULLY WILLIAM P · CIK 0001045463 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 620,193

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December 31, 2024 Filed May 2, 2025 14:29 UTC PurchaseOrdinary Shares, par value $0.01 per share 1,200 $13.37 $16,038.24
Disclosure

SEC source: 0000950170-25-062317 · ownership.xml · nonDerivative · entry 6

SCULLY WILLIAM P · CIK 0001045463 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 619,393

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December 20, 2024 Filed May 2, 2025 14:29 UTC GiftOrdinary Shares, par value $0.01 per share 40,000 $0.00 $0.00
Disclosure

SEC source: 0000950170-25-062317 · ownership.xml · nonDerivative · entry 12

SCULLY WILLIAM P · CIK 0001045463 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By Spouse

Disclosed balance after: 59,000

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December 20, 2024 Filed May 2, 2025 14:29 UTC GiftOrdinary Shares, par value $0.01 per share 500 $0.00 $0.00
Disclosure

SEC source: 0000950170-25-062317 · ownership.xml · nonDerivative · entry 5

SCULLY WILLIAM P · CIK 0001045463 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 618,193

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December 20, 2024 Filed May 2, 2025 14:29 UTC PurchaseOrdinary Shares, par value $0.01 per share 2,000 $15.91 $31,813.00
Disclosure

SEC source: 0000950170-25-062317 · ownership.xml · nonDerivative · entry 4

SCULLY WILLIAM P · CIK 0001045463 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 618,693

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December 19, 2024 Filed May 2, 2025 14:29 UTC GiftOrdinary Shares, par value $0.01 per share 681,000 $0.00 $0.00
Disclosure

SEC source: 0000950170-25-062317 · ownership.xml · nonDerivative · entry 3

SCULLY WILLIAM P · CIK 0001045463 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 616,693

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December 18, 2024 Filed May 2, 2025 14:29 UTC PurchaseOrdinary Shares, par value $0.01 per share 73,436 $13.93 $1,022,669.74
Disclosure

SEC source: 0000950170-25-062317 · ownership.xml · nonDerivative · entry 2

SCULLY WILLIAM P · CIK 0001045463 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,297,693

F1 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $13.85 to $14.00, inclusive. The reporting person undertakes to provide to Prothena Corp Public Ltd Co, any security holder of Prothena Corp Public Ltd Co, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (1), (2), and (3) to this Form 4.

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December 18, 2024 Filed May 2, 2025 14:29 UTC GiftOrdinary Shares, par value $0.01 per share 430,000 $0.00 $0.00
Disclosure

SEC source: 0000950170-25-062317 · ownership.xml · nonDerivative · entry 1

SCULLY WILLIAM P · CIK 0001045463 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,224,257

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October 01, 2024 Filed Oct 3, 2024 22:58 UTC
Swanson Chad J.Chief Development Officer
GrantStock Option (Right to Buy) · Derivative 40,000 $0.00 Strike: $16.65 $0.00
Disclosure

SEC source: 0000905148-24-002639 · form4.xml · derivative · entry 1

Swanson Chad J. · CIK 0002038509 · Chief Development Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 40,000

Underlying: Ordinary Shares · 40,000 shares

Expires 2034-10-01

F1 · derivative.exercise_date: The shares subject to the option will vest and become exercisable as to 25% of the total number of shares subject to the option on October 1, 2025, and with respect to 1/48th of the total number of shares subject to the option in successive, equal monthly installments on each monthly anniversary thereafter, subject to the Reporting Person's continued employment with the Issuer on each such vesting date.

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May 15, 2024 Filed May 17, 2024 20:31 UTC GrantStock Option (Right to Buy) · Derivative 15,000 $0.00 Strike: $22.39 $0.00
Disclosure

SEC source: 0000905148-24-001530 · form4.xml · derivative · entry 1

COLLIER RICHARD T · CIK 0001110751 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,000

Underlying: Ordinary Shares · 15,000 shares

Expires 2034-05-15

F1 · derivative.exercise_date: The shares subject to the option will vest and become exercisable as to 100% of the total number of shares subject to the option on the earlier of the first anniversary of the grant date or the day of the annual general meeting in 2025 of the Issuer's shareholders, assuming continuous service as a director until such vesting date.

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May 15, 2024 Filed May 17, 2024 16:40 UTC GrantStock Option (Right to Buy) · Derivative 15,000 $0.00 Strike: $22.39 $0.00
Disclosure

SEC source: 0000905148-24-001538 · form4.xml · derivative · entry 1

Kim Helen Susan · CIK 0001422772 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,000

Underlying: Ordinary Shares · 15,000 shares

Expires 2034-05-15

F1 · derivative.exercise_date: The shares subject to the option will vest and become exercisable as to 100% of the total number of shares subject to the option on the earlier of the first anniversary of the grant date or the day of the annual general meeting in 2025 of the Issuer's shareholders, assuming continuous service as a director until such vesting date.

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May 15, 2024 Filed May 17, 2024 20:44 UTC GrantStock Option (Right to Buy) · Derivative 15,000 $0.00 Strike: $22.39 $0.00
Disclosure

SEC source: 0000905148-24-001542 · form4.xml · derivative · entry 1

WELCH DANIEL G · CIK 0001206199 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,000

Underlying: Ordinary Shares · 15,000 shares

Expires 2034-05-15

F1 · derivative.exercise_date: The shares subject to the option will vest and become exercisable as to 100% of the total number of shares subject to the option on the earlier of the first anniversary of the grant date or the day of the annual general meeting in 2025 of the Issuer's shareholders, assuming continuous service as a director until such vesting date.

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Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.