PROTHENA CORPORATION PUBLIC LIMITED COMPANY
PROTHENA CORPORATION PUBLIC LIMITED COMPANY is a Public Limited Company registered in Ireland under IE518146, and its current status with Companies Registration Office (CRO) is active. The company was incorporated on 26 September 2012 and lists its registered address as Ireland. 3 shareholders are on record for PROTHENA CORPORATION PUBLIC LIMITED COMPANY, and since every one of them is a company rather than an individual, this particular filing does not on its own establish an ultimate beneficial owner (UBO) — identifying one would mean tracing the ownership of each shareholding company in turn. This profile is sourced directly from Companies Registration Office (CRO) and was last updated on 18 September 2026.
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Shareholders
3
Shareholders of PROTHENA CORPORATION PUBLIC LIMITED COMPANY
Three shareholders are currently on record for PROTHENA CORPORATION PUBLIC LIMITED COMPANY, held on the Annual Return (Form B1), filed under section 342 of the Companies Act 2014. The largest of these is Vanguard Group Inc, holding 6.6% — the largest recorded stake — followed by SPDR SERIES TRUST-State Street SPDR S&P Biotech ETF at 4.2%; the remaining 1 shareholder shown holds smaller stakes. Because every shareholder shown is a company rather than an individual, the ownership chain continues above this level, and no beneficial owner can be established from this filing alone.
| Shareholder | Type | Holding | Source Document |
|---|---|---|---|
| Vanguard Group Inc | 6.6% | Companies Registration Office (CRO) | |
| SPDR SERIES TRUST-State Street SPDR S&P Biotech ETF | 4.2% | Companies Registration Office (CRO) | |
| Fidelity Salem Street Trust-Fidelity Small Cap Index Fund | 1.3% | Companies Registration Office (CRO) |
Officers
37
Directors and officers of PROTHENA CORPORATION PUBLIC LIMITED COMPANY
The President, Ceo & Director of PROTHENA CORPORATION PUBLIC LIMITED COMPANY currently on record is Gene G. Kinney Ph.d.; 24 of the 37 officer records shown for PROTHENA CORPORATION PUBLIC LIMITED COMPANY are current appointments, filed with Companies Registration Office (CRO). The remaining 11 records shown (DAVID ANTHONY WIDGER, MARK JOHN WARD and 9 others) are former appointments that have since been resigned. Management authority at PROTHENA CORPORATION PUBLIC LIMITED COMPANY sits with these individuals, not with shareholders, who are covered separately and hold ownership rather than control. The source filing doesn't specify representation authority — whether officers can act individually or must sign jointly to bind the company — so that detail isn't available here.
Group Structure
Group structure of PROTHENA CORPORATION PUBLIC LIMITED COMPANY
PROTHENA CORPORATION PUBLIC LIMITED COMPANY has no recorded parent company — it sits at the top of its own group structure, with 3 subsidiaries recorded beneath it across 2 jurisdictions. Each of these downward relationships is derived rather than filed: resolved by matching entities across the registry network, not stated directly in a single document.
- Prothena Biosciences Inc (United States)
- PROTHENA BIOSCIENCES LIMITED (Ireland)
- Prothena Finance Inc (United States)
Data availability
Those 3 subsidiaries span Ireland, United States jurisdictions, though this list should not be read as complete — subsidiaries only become visible here where shareholder data has actually been filed with a register, so holdings in jurisdictions without that filing simply won't appear. One of the 3 go a level deeper still, with its own further subsidiaries recorded beneath it — additional ownership layers this view doesn't expand.
PROTHENA CORPORATION PUBLIC LIMITED COMPANY
Ireland
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Frequently Asked Questions
Who owns PROTHENA CORPORATION PUBLIC LIMITED COMPANY?
Three shareholders are currently on record for PROTHENA CORPORATION PUBLIC LIMITED COMPANY, held on the Annual Return (Form B1), filed under section 342 of the Companies Act 2014. The largest of these is Vanguard Group Inc, holding 6.6% — the largest recorded stake — followed by SPDR SERIES TRUST-State Street SPDR S&P Biotech ETF at 4.2%; the remaining 1 shareholder shown holds smaller stakes. Because every shareholder shown is a company rather than an individual, the ownership chain continues above this level, and no beneficial owner can be established from this filing alone.
Who is PROTHENA CORPORATION PUBLIC LIMITED COMPANY's UBO (Ultimate Beneficial Owner)?
Every shareholder recorded for PROTHENA CORPORATION PUBLIC LIMITED COMPANY is itself a company rather than a natural person, so no Ultimate Beneficial Owner (UBO) is identified at this level; establishing one would require tracing the ownership of each shareholding company in turn.
How many shareholders does PROTHENA CORPORATION PUBLIC LIMITED COMPANY have on record?
3 shareholders are shown on record for PROTHENA CORPORATION PUBLIC LIMITED COMPANY.
What is PROTHENA CORPORATION PUBLIC LIMITED COMPANY's company registration number?
PROTHENA CORPORATION PUBLIC LIMITED COMPANY's registration number is IE518146, filed with Companies Registration Office (CRO) in Ireland. Its current status on the register is active.
Is PROTHENA CORPORATION PUBLIC LIMITED COMPANY still an active company?
PROTHENA CORPORATION PUBLIC LIMITED COMPANY's status on Companies Registration Office (CRO) is listed as active.
When was PROTHENA CORPORATION PUBLIC LIMITED COMPANY incorporated?
PROTHENA CORPORATION PUBLIC LIMITED COMPANY was incorporated on 26 September 2012, according to Companies Registration Office (CRO).
What is PROTHENA CORPORATION PUBLIC LIMITED COMPANY's registered address?
The registered address on file for PROTHENA CORPORATION PUBLIC LIMITED COMPANY is Ireland.
What legal structure is PROTHENA CORPORATION PUBLIC LIMITED COMPANY registered as?
PROTHENA CORPORATION PUBLIC LIMITED COMPANY is registered as a Public Limited Company in Ireland.
Who are the officers/directors of PROTHENA CORPORATION PUBLIC LIMITED COMPANY?
The President, Ceo & Director of PROTHENA CORPORATION PUBLIC LIMITED COMPANY currently on record is Gene G. Kinney Ph.d.; 24 of the 37 officer records shown for PROTHENA CORPORATION PUBLIC LIMITED COMPANY are current appointments, filed with Companies Registration Office (CRO). The remaining 11 records shown (DAVID ANTHONY WIDGER, MARK JOHN WARD and 9 others) are former appointments that have since been resigned. Management authority at PROTHENA CORPORATION PUBLIC LIMITED COMPANY sits with these individuals, not with shareholders, who are covered separately and hold ownership rather than control.
Does PROTHENA CORPORATION PUBLIC LIMITED COMPANY have a parent company or subsidiaries?
PROTHENA CORPORATION PUBLIC LIMITED COMPANY has no recorded parent company — it sits at the top of its own group structure, with 3 subsidiaries recorded beneath it across 2 jurisdictions. Those 3 subsidiaries span Ireland, United States jurisdictions, though this list should not be read as complete — subsidiaries only become visible here where shareholder data has actually been filed with a register, so holdings in jurisdictions without that filing simply won't appear. One of the 3 go a level deeper still, with its own further subsidiaries recorded beneath it — additional ownership layers this view doesn't expand.
Can Zavia monitor changes to PROTHENA CORPORATION PUBLIC LIMITED COMPANY's ownership over time?
This profile reflects a point-in-time snapshot from Companies Registration Office (CRO). Zavia's monitoring API can track changes to PROTHENA CORPORATION PUBLIC LIMITED COMPANY's registered shareholders, officers, and group structure going forward, flagging updates as they're filed rather than requiring a manual recheck.
Can I access PROTHENA CORPORATION PUBLIC LIMITED COMPANY's data through an API?
Yes. Zavia's API connects directly to official government ownership registries across 195 countries and territories, including Ireland, so records like PROTHENA CORPORATION PUBLIC LIMITED COMPANY's registration, shareholder, UBO, and group-structure data can be queried programmatically instead of viewed one page at a time.
Where does this company information come from, and how current is it?
This record is sourced directly from Companies Registration Office (CRO) and was last synced on 18 September 2026.