As of November 6, 2026, Prothena Corp Public Ltd Co has reported one leadership change filing to the SEC under Item 5.02 of Form 8-K, on October 2, 2026, naming 1 departure. The latest filing names Chad J. Swanson, leaving (Form 8-K, October 2, 2026).
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Prothena Corp Public Ltd Co reported a change among its directors and officers to the SEC on Form 8-K, Item 5.02, on 2026-10-02. It names 1 person. Every row below is cited to the filing it comes from, and this page adds each new change as Prothena Corp Public Ltd Co files it.
Also on the record for Prothena Corp Public Ltd Co
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| August 19, 2026 | Stake report, Schedule 13G/A, by Fennell Todd W. | 10.2% of the class | 5%+ stakes | Source |
| August 14, 2026 | Stake report, Schedule 13G/A, by Fennell Todd W. | 9.8% of the class | 5%+ stakes | Source |
| August 6, 2026 | Stake report, Schedule 13G/A, by FMR LLC | 13.8% of the class | 5%+ stakes | Source |
| July 29, 2026 | Stake report, Schedule 13G/A, by BlackRock, Inc. | 6.9% of the class | 5%+ stakes | Source |
| May 15, 2026 | Stake report, Schedule 13G/A, by Rubric Capital Management LP | 9.29% of the class | 5%+ stakes | Source |
| May 11, 2026 | Stake report, Schedule 13G/A, by SCULLY WILLIAM P | 10.3% of the class | 5%+ stakes | Source |
| February 13, 2026 | Stake report, Schedule 13G, by Rubric Capital Management LP | 6.83% of the class | 5%+ stakes | Source |
| November 14, 2025 | Stake report, Schedule 13G/A, by ADAR1 Capital Management, LLC | 2.7% of the class | 5%+ stakes | Source |
| November 12, 2025 | Stake report, Schedule 13G/A, by Fennell Todd W. | 8.4% of the class | 5%+ stakes | Source |
| November 12, 2025 | Stake report, Schedule 13G/A, by SCULLY WILLIAM P | 9.8% of the class | 5%+ stakes | Source |
| October 17, 2025 | Stake report, Schedule 13G/A, by BlackRock, Inc. | 5.7% of the class | 5%+ stakes | Source |
| August 14, 2025 | Stake report, Schedule 13G, by ADAR1 Capital Management, LLC | 6.3% of the class | 5%+ stakes | Source |
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More on Prothena Corp Public Ltd Co and the records around it.
Prothena Corp Public Ltd Co elsewhere on the record
- 5%+ stake filings Aug 2026
- Who owns it
Companies that share a holder
- Logos Global Management LP also filed stake reports on 14 other companies: Longeveron Inc. (Sep 2026), ACHIEVE LIFE SCIENCES, INC. (Aug 2026), Yarrow Bioscience, Inc. (Aug 2026)
- ADAR1 Capital Management, LLC also filed stake reports on 29 other companies: InMed Pharmaceuticals, Inc. (Oct 2026), Tenax Therapeutics, Inc. (Sep 2026), Adagio Medical Holdings, Inc. (Aug 2026)
- Rubric Capital Management LP also filed stake reports on 32 other companies: ARDELYX, INC. (Aug 2026), Enovis Corporation (Aug 2026), MeiraGTx Holdings plc (Aug 2026)
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The newest 12 of 16 records.
Timeline
| Filed | In / out | Person | Role | Effective | Source |
|---|---|---|---|---|---|
| 2026-10-02 | Out | 8-K, 2026-10-02 |
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Find candidates like senior executive at Prothena Corp Public Ltd CoEvery change, in the filing's words
Departing: Chad J. Swanson
Dr. Swanson is resigning to accept a position with one of the Company's strategic partners, and, as part of his new role, will assume a leadership role over a program partnered with the Company.
- On October 2, 2026, Chad J. Swanson, Ph.D., Chief Development Officer of Prothena Corporation plc (the "Company") notified the Company that he is resigning from the Company effective October 9, 2026.
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Where this comes from
A public company must file a current report on Form 8-K with the SEC within four business days when a director leaves or is elected, or when its chief executive, chief financial, chief accounting or chief operating officer, or another named executive, departs or is appointed. That disclosure goes under Item 5.02 of the report.
Every change on this page is taken from one of those filings and quoted in the company's own words, with a link to the filing, so it can be checked at the source. Where a filing names the person, the role and the date a change takes effect, they are shown beside the quote. Where it does not, the quote stands on its own. A filing states what changed; it rarely states why, and neither does this page.