Reported relationships
Latest disclosed role at each company.
| Company | Last reported as | Report date | Published |
|---|---|---|---|
| PROTHENA CORP PUBLIC LTD COPRTA · Entity 2375 | Chief Legal Officer | March 03, 2026 | March 05, 2026 |
Disclosed balances
About these balances
Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.
PROTHENA CORP PUBLIC LTD CO
Report date March 03, 2026 · Filed March 05, 2026
| Security / award | Ownership account | Disclosed shares / units | Disclosure context |
|---|---|---|---|
| Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $9.36 · Expires 2036-03-03 | Direct | 190,000 |
Reported balance
After 2026-03-03 transaction · row 1
Instrument identity requires review; Table II rows are not merged.
1 source rowRow 1 · 2026-03-03 · Grant · Acquired 190,000 · Balance 190,000 F1: 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. |
Filing footnotes · ownership attribution and instrument terms
F1: 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.
Transaction history
JSON APIPurchases/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 date | Company | Activity / security | Shares / units | Reported price | Reported value | Details |
|---|---|---|---|---|---|---|
| October 27, 2022 Filed Oct 29, 2022 01:30 UTC | PROTHENA CORP PUBLIC LTD CO PRTA · Entity 2375 | Exercise / conversionStock Option (Right to Buy) · Derivative | 20,000 | $0.00 Strike: $10.27 | $0.00 |
DisclosureSEC source: 0001567619-22-018925 · doc1.xml · derivative · entry 8 Malecek Michael J · CIK 0001779336 · Chief Legal Officer 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 145,000 Underlying: Ordinary Shares · 20,000 shares Expires 2029-07-01 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F6 · derivative.exercise_date: The shares subject to the option vested and became exercisable as to 25% of the total number of shares subject to the option on July 1, 2020, and vest and become exercisable 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 |
| October 27, 2022 Filed Oct 29, 2022 01:30 UTC | PROTHENA CORP PUBLIC LTD CO PRTA · Entity 2375 | SaleOrdinary Shares, par value $0.01 per share | 20,000 | $62.00 | $1,240,004.00 |
DisclosureSEC source: 0001567619-22-018925 · doc1.xml · nonDerivative · entry 6 Malecek Michael J · CIK 0001779336 · Chief Legal Officer 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 0 F1 · kind: The transactions reported in the Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person. F5 · price: The transaction was executed in multiple trades in prices ranging from $62.00 to $62.06, inclusive. Read SEC document |
| October 27, 2022 Filed Oct 29, 2022 01:30 UTC | PROTHENA CORP PUBLIC LTD CO PRTA · Entity 2375 | Exercise / conversionOrdinary Shares, par value $0.01 per share | 20,000 | $10.27 | $205,400.00 |
DisclosureSEC source: 0001567619-22-018925 · doc1.xml · nonDerivative · entry 5 Malecek Michael J · CIK 0001779336 · Chief Legal Officer 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 20,000 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
| October 26, 2022 Filed Oct 29, 2022 01:30 UTC | PROTHENA CORP PUBLIC LTD CO PRTA · Entity 2375 | Exercise / conversionStock Option (Right to Buy) · Derivative | 65,000 | $0.00 Strike: $10.27 | $0.00 |
DisclosureSEC source: 0001567619-22-018925 · doc1.xml · derivative · entry 7 Malecek Michael J · CIK 0001779336 · Chief Legal Officer 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 165,000 Underlying: Ordinary Shares · 65,000 shares Expires 2029-07-01 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F6 · derivative.exercise_date: The shares subject to the option vested and became exercisable as to 25% of the total number of shares subject to the option on July 1, 2020, and vest and become exercisable 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 |
| October 26, 2022 Filed Oct 29, 2022 01:30 UTC | PROTHENA CORP PUBLIC LTD CO PRTA · Entity 2375 | SaleOrdinary Shares, par value $0.01 per share | 19,720 | $61.12 | $1,205,227.24 |
DisclosureSEC source: 0001567619-22-018925 · doc1.xml · nonDerivative · entry 4 Malecek Michael J · CIK 0001779336 · Chief Legal Officer 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 0 F1 · kind: The transactions reported in the Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person. F4 · price: The transaction was executed in multiple trades in prices ranging from $60.815 to $61.49, inclusive. Read SEC document |
| October 26, 2022 Filed Oct 29, 2022 01:30 UTC | PROTHENA CORP PUBLIC LTD CO PRTA · Entity 2375 | SaleOrdinary Shares, par value $0.01 per share | 29,572 | $60.27 | $1,782,334.01 |
DisclosureSEC source: 0001567619-22-018925 · doc1.xml · nonDerivative · entry 3 Malecek Michael J · CIK 0001779336 · Chief Legal Officer 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 19,720 F1 · kind: The transactions reported in the Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person. F3 · price: The transaction was executed in multiple trades in prices ranging from $59.785 to $60.775, inclusive. Read SEC document |
| October 26, 2022 Filed Oct 29, 2022 01:30 UTC | PROTHENA CORP PUBLIC LTD CO PRTA · Entity 2375 | SaleOrdinary Shares, par value $0.01 per share | 15,708 | $59.37 | $932,585.53 |
DisclosureSEC source: 0001567619-22-018925 · doc1.xml · nonDerivative · entry 2 Malecek Michael J · CIK 0001779336 · Chief Legal Officer 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 49,292 F1 · kind: The transactions reported in the Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person. F2 · price: The transaction was executed in multiple trades in prices ranging from $58.785 to $59.78, inclusive. The price reported in Column 4 above reflects the weighted average sale price. The reporting person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in footnotes 2 through 5 of this Form 4. Read SEC document |
| October 26, 2022 Filed Oct 29, 2022 01:30 UTC | PROTHENA CORP PUBLIC LTD CO PRTA · Entity 2375 | Exercise / conversionOrdinary Shares, par value $0.01 per share | 65,000 | $10.27 | $667,550.00 |
DisclosureSEC source: 0001567619-22-018925 · doc1.xml · nonDerivative · entry 1 Malecek Michael J · CIK 0001779336 · Chief Legal Officer 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 65,000 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
| February 23, 2022 Filed Feb 26, 2022 02:30 UTC | PROTHENA CORP PUBLIC LTD CO PRTA · Entity 2375 | GrantStock Option (Right to Buy) · Derivative | 85,000 | $0.00 Strike: $32.45 | $0.00 |
DisclosureSEC source: 0001140361-22-006888 · form4.xml · derivative · entry 1 Malecek Michael J · CIK 0001779336 · Chief Legal Officer 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 85,000 Underlying: Ordinary Shares · 85,000 shares Expires 2032-02-23 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 February 23, 2023 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 |
| November 19, 2021 Filed Nov 20, 2021 02:32 UTC | PROTHENA CORP PUBLIC LTD CO PRTA · Entity 2375 | Exercise / conversionStock Option (Right to Buy) · Derivative | 10,000 | $0.00 Strike: $10.27 | $0.00 |
DisclosureSEC source: 0001567619-21-020909 · doc1.xml · derivative · entry 3 Malecek Michael J · CIK 0001779336 · See Remarks 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 230,000 Underlying: Ordinary Shares · 10,000 shares Expires 2029-07-01 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F2 · derivative.exercise_date: The shares subject to the option vest and become exercisable as to 25% of the total number of shares subject to the option on July 1, 2020 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 |
| November 19, 2021 Filed Nov 20, 2021 02:32 UTC | PROTHENA CORP PUBLIC LTD CO PRTA · Entity 2375 | SaleOrdinary Shares, par value $0.01 per share | 10,000 | $55.00 | $550,000.00 |
DisclosureSEC source: 0001567619-21-020909 · doc1.xml · nonDerivative · entry 2 Malecek Michael J · CIK 0001779336 · See Remarks 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 0 F1 · kind: The transactions reported in the Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person. Read SEC document |
| November 19, 2021 Filed Nov 20, 2021 02:32 UTC | PROTHENA CORP PUBLIC LTD CO PRTA · Entity 2375 | Exercise / conversionOrdinary Shares, par value $0.01 per share | 10,000 | $10.27 | $102,700.00 |
DisclosureSEC source: 0001567619-21-020909 · doc1.xml · nonDerivative · entry 1 Malecek Michael J · CIK 0001779336 · See Remarks 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 10,000 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
| October 27, 2021 Filed Oct 29, 2021 21:00 UTC | PROTHENA CORP PUBLIC LTD CO PRTA · Entity 2375 | Exercise / conversionStock Option (Right to Buy) · Derivative | 10,000 | $0.00 Strike: $10.27 | $0.00 |
DisclosureSEC source: 0001567619-21-019011 · doc1.xml · derivative · entry 6 Malecek Michael J · CIK 0001779336 · See Remarks 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 240,000 Underlying: Ordinary Shares · 10,000 shares Expires 2029-07-01 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F6 · derivative.exercise_date: The shares subject to the option vest and become exercisable as to 25% of the total number of shares subject to the option on July 1, 2020 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 |
| October 27, 2021 Filed Oct 29, 2021 21:00 UTC | PROTHENA CORP PUBLIC LTD CO PRTA · Entity 2375 | SaleOrdinary Shares, par value $0.01 per share | 20 | $60.89 | $1,217.70 |
DisclosureSEC source: 0001567619-21-019011 · doc1.xml · nonDerivative · entry 5 Malecek Michael J · CIK 0001779336 · See Remarks 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 0 F1 · kind: The transactions reported in the Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person. F5 · price: The transaction was executed in multiple trades in prices ranging from $60.88 to $60.89, inclusive. The price reported in Column 4 above reflects the weighted average sale price. The reporting person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote. Read SEC document |
| October 27, 2021 Filed Oct 29, 2021 21:00 UTC | PROTHENA CORP PUBLIC LTD CO PRTA · Entity 2375 | SaleOrdinary Shares, par value $0.01 per share | 1,066 | $60.03 | $63,992.73 |
DisclosureSEC source: 0001567619-21-019011 · doc1.xml · nonDerivative · entry 4 Malecek Michael J · CIK 0001779336 · See Remarks 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 20 F1 · kind: The transactions reported in the Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person. F4 · price: The transaction was executed in multiple trades in prices ranging from $59.52 to $60.46, inclusive. The price reported in Column 4 above reflects the weighted average sale price. The reporting person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote. Read SEC document |
| October 27, 2021 Filed Oct 29, 2021 21:00 UTC | PROTHENA CORP PUBLIC LTD CO PRTA · Entity 2375 | SaleOrdinary Shares, par value $0.01 per share | 2,950 | $58.88 | $173,707.51 |
DisclosureSEC source: 0001567619-21-019011 · doc1.xml · nonDerivative · entry 3 Malecek Michael J · CIK 0001779336 · See Remarks 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 1,086 F1 · kind: The transactions reported in the Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person. F3 · price: The transaction was executed in multiple trades in prices ranging from $58.52 to $59.51, inclusive. The price reported in Column 4 above reflects the weighted average sale price. The reporting person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote. Read SEC document |
| October 27, 2021 Filed Oct 29, 2021 21:00 UTC | PROTHENA CORP PUBLIC LTD CO PRTA · Entity 2375 | SaleOrdinary Shares, par value $0.01 per share | 5,964 | $58.07 | $346,331.87 |
DisclosureSEC source: 0001567619-21-019011 · doc1.xml · nonDerivative · entry 2 Malecek Michael J · CIK 0001779336 · See Remarks 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 4,036 F1 · kind: The transactions reported in the Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person. F2 · price: The transaction was executed in multiple trades in prices ranging from $57.35 to $58.30, inclusive. The price reported in Column 4 above reflects the weighted average sale price. The reporting person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote. Read SEC document |
| October 27, 2021 Filed Oct 29, 2021 21:00 UTC | PROTHENA CORP PUBLIC LTD CO PRTA · Entity 2375 | Exercise / conversionOrdinary Shares, par value $0.01 per share | 10,000 | $10.27 | $102,700.00 |
DisclosureSEC source: 0001567619-21-019011 · doc1.xml · nonDerivative · entry 1 Malecek Michael J · CIK 0001779336 · See Remarks 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 10,000 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
| February 25, 2021 Filed Feb 26, 2021 22:11 UTC | PROTHENA CORP PUBLIC LTD CO PRTA · Entity 2375 | GrantStock Option (Right to Buy) · Derivative | 56,000 | $0.00 Strike: $22.60 | $0.00 |
DisclosureSEC source: 0001567619-21-005083 · doc1.xml · derivative · entry 1 Malecek Michael J · CIK 0001779336 · See Remarks 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 56,000 Underlying: Ordinary Shares · 56,000 shares Expires 2031-02-25 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 February 25, 2022 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 |
| February 25, 2020 Filed Feb 27, 2020 22:19 UTC | PROTHENA CORP PUBLIC LTD CO PRTA · Entity 2375 | GrantStock Option (Right to Buy) · Derivative | 70,000 | $0.00 Strike: $12.15 | $0.00 |
DisclosureSEC source: 0001567619-20-005022 · doc1.xml · derivative · entry 1 Malecek Michael J · CIK 0001779336 · See Remarks 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 70,000 Underlying: Ordinary Shares · 70,000 shares Expires 2030-02-25 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 February 25, 2021 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 01, 2019 Filed Jul 3, 2019 18:10 UTC | PROTHENA CORP PUBLIC LTD CO PRTA · Entity 2375 | GrantStock Option (Right to Buy) · Derivative | 250,000 | $0.00 Strike: $10.27 | $0.00 |
DisclosureSEC source: 0001567619-19-014388 · doc1.xml · derivative · entry 1 Malecek Michael J · CIK 0001779336 · See Remarks 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 250,000 Underlying: Ordinary Shares · 250,000 shares Expires 2029-07-01 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 July 1, 2020 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 |
Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.