Home › Companies › Prothena Corporation plc › 2025-2026
Compiled from SEC Form N-PX filings and Prothena Corporation plc’s Form 8-K, filed May 15, 2026 (Item 5.07 on EDGAR). Page generated October 18, 2026.
Meeting of May 14, 2026: 4 items on Prothena Corporation plc’s Form 8-K, filed May 15, 2026: 2 elected · 2 approved.
Meeting of November 19, 2025: 1 item on Prothena Corporation plc’s Form 8-K, filed November 19, 2025: 1 approved.
Material dissent: a director nominee under 80% of the votes cast, say-on-pay under 70%, any other item the board put forward under 80%, or a shareholder proposal with more than 50%, on the company’s own Form 8-K tally. How this is decided
Explore Prothena Corporation plc in the interactive database Compare manager voting policies
These tallies are Prothena Corporation plc’s own, as disclosed to the U.S. Securities and Exchange Commission on Form 8-K, filed May 15, 2026 (Item 5.07, “Submission of Matters to a Vote of Security Holders”). They cover every share voted at the meeting, not just the funds that file Form N-PX. Prothena Corporation plc reported 2 meetings in this season; each is tabulated separately below, with its own filing.
| Ballot item | For | Against | Abstain | Withheld | Broker non-votes | Support (of votes cast) | Reported outcome | Voting standard |
|---|---|---|---|---|---|---|---|---|
| Elect Director: Shane M. Cooke | 22,720,769 | 11,923,467 | 9,139 | -- | 7,374,142 | 66% | Elected | — |
| Elect Director: Dennis J. Selkoe | 25,226,560 | 9,420,544 | 6,271 | -- | 7,374,142 | 73% | Elected | — |
| 2. Ratification of Appointment of the Company's Independent Registered Public Accounting Firm for 2026 and Authorization of the Board of Directors to Approve the Remuneration of that Auditor | 41,931,718 | 82,815 | 12,984 | -- | -- | 99.8% | Approved | — |
| 3. Approval of Compensation of the Company's Named Executive Officers | 32,303,076 | 1,145,400 | 1,204,899 | -- | 7,374,142 | 97% | Approved | — |
Source: Prothena Corporation plc, Form 8-K, filed with the SEC on May 15, 2026 — read the filing on EDGAR.
| Ballot item | For | Against | Abstain | Withheld | Broker non-votes | Support (of votes cast) | Reported outcome | Voting standard |
|---|---|---|---|---|---|---|---|---|
| 1. Approval of a Reduction of the Company's Capital to Create Distributable Reserves | 37,779,052 | 46,738 | 45,906 | -- | -- | 99.8% | Approved | — |
Source: Prothena Corporation plc, Form 8-K, filed with the SEC on November 19, 2025 — read the filing on EDGAR.
Each item below shows how the 218 asset managers that disclosed a Prothena Corporation plc vote in their SEC Form N-PX filings actually voted. Share totals are the shares those managers' funds voted, summed across every fund they report.
Meeting held May 14, 2026.
Combines 4 wordings of this item as funds reported it.
66% Majority: yes · of votes cast
Description as filed by funds: To elect, by separate resolutions, two directors to hold office until no later than the Annual General Meeting of the Company's Shareholders in 2029, unless they resign, are removed from office, or are otherwise disqualified from serving as directors of the Company: Shane M. Cooke
Prothena Corporation plc’s own tally for this item (“Elect Director: Shane M. Cooke”): 22,720,769 for, 11,923,467 against, per its Form 8-K filed May 15, 2026 (Item 5.07). FOR was more than half of the votes cast. Whether the item passed is for the filing to say; its statement has not been read for this item.
Reported outcome: Elected, in the filing’s own words: “The shareholders re-elected the following individuals to the Company's Board of Directors to hold office until no later than the annual general meeting of shareholders in 2029.”
Support: 66% of votes cast — FOR ÷ (FOR + AGAINST); abstentions and broker non-votes are excluded.
The 52 asset managers below reported 6,851,394 for, 6,250,007 against.
| Asset manager | For | Against | Abstain | Withheld | Vote |
|---|---|---|---|---|---|
| Fidelity | 535,381 | 3,894,973 | 0 | 0 | Mixed |
| BlackRock | 2,176,327 | 0 | 0 | 0 | For |
| Vanguard | 1,908,874 | 4,420 | 0 | 0 | For |
| State Street | 0 | 1,345,028 | 0 | 0 | Against |
| TIAA | 0 | 755,110 | 0 | 0 | Against |
| Federated Hermes | 728,422 | 0 | 0 | 0 | For |
| Charles Schwab | 362,188 | 0 | 0 | 0 | For |
| Bridge Builder Trust | 220,592 | 0 | 0 | 0 | For |
| Nationwide | 150,007 | 0 | 0 | 0 | For |
| Equitable | 61,798 | 49,840 | 0 | 0 | Mixed |
| MFS | 0 | 111,437 | 0 | 0 | Against |
| Columbia Threadneedle | 82,422 | 0 | 0 | 0 | For |
| American Century | 79,685 | 0 | 0 | 0 | For |
| QUANTITATIVE MASTER SERIES LLC | 66,028 | 0 | 0 | 0 | For |
| GuideStone | 60,642 | 0 | 0 | 0 | For |
| Direxion Shares ETF Trust | 57,799 | 0 | 0 | 0 | For |
| Goldman Sachs | 48,210 | 0 | 0 | 0 | For |
| ProShares | 41,190 | 0 | 0 | 0 | For |
| CLEARWATER INVESTMENT TRUST | 38,331 | 0 | 0 | 0 | For |
| Lincoln Financial | 2,055 | 32,445 | 0 | 0 | Mixed |
| MASTER INVESTMENT PORTFOLIO | 29,427 | 0 | 0 | 0 | For |
| ETFis Series Trust I | 27,194 | 0 | 0 | 0 | For |
| Russell Investments | 25,368 | 0 | 0 | 0 | For |
| Northern Trust | 0 | 23,852 | 0 | 0 | Against |
| AIG/SunAmerica | 22,023 | 0 | 0 | 0 | For |
Showing the 25 largest of 52 asset managers. See all 52 in the interactive database.
Meeting held May 14, 2026.
Combines 4 wordings of this item as funds reported it.
73% Majority: yes · of votes cast
Description as filed by funds: To elect, by separate resolutions, two directors to hold office until no later than the Annual General Meeting of the Company's Shareholders in 2029, unless they resign, are removed from office, or are otherwise disqualified from serving as directors of the Company: Dennis J. Selkoe
Prothena Corporation plc’s own tally for this item (“Elect Director: Dennis J. Selkoe”): 25,226,560 for, 9,420,544 against, per its Form 8-K filed May 15, 2026 (Item 5.07). FOR was more than half of the votes cast. Whether the item passed is for the filing to say; its statement has not been read for this item.
Reported outcome: Elected, in the filing’s own words: “The shareholders re-elected the following individuals to the Company's Board of Directors to hold office until no later than the annual general meeting of shareholders in 2029.”
Support: 73% of votes cast — FOR ÷ (FOR + AGAINST); abstentions and broker non-votes are excluded.
The 52 asset managers below reported 8,251,362 for, 4,850,039 against.
| Asset manager | For | Against | Abstain | Withheld | Vote |
|---|---|---|---|---|---|
| Fidelity | 535,381 | 3,894,973 | 0 | 0 | Mixed |
| BlackRock | 2,176,327 | 0 | 0 | 0 | For |
| Vanguard | 1,910,230 | 3,064 | 0 | 0 | For |
| State Street | 1,345,028 | 0 | 0 | 0 | For |
| TIAA | 0 | 755,110 | 0 | 0 | Against |
| Federated Hermes | 728,422 | 0 | 0 | 0 | For |
| Charles Schwab | 362,188 | 0 | 0 | 0 | For |
| Bridge Builder Trust | 220,592 | 0 | 0 | 0 | For |
| Nationwide | 150,007 | 0 | 0 | 0 | For |
| Equitable | 61,798 | 49,840 | 0 | 0 | Mixed |
| MFS | 0 | 111,437 | 0 | 0 | Against |
| Columbia Threadneedle | 82,422 | 0 | 0 | 0 | For |
| American Century | 79,685 | 0 | 0 | 0 | For |
| QUANTITATIVE MASTER SERIES LLC | 66,028 | 0 | 0 | 0 | For |
| GuideStone | 60,642 | 0 | 0 | 0 | For |
| Direxion Shares ETF Trust | 57,799 | 0 | 0 | 0 | For |
| Goldman Sachs | 48,210 | 0 | 0 | 0 | For |
| ProShares | 41,190 | 0 | 0 | 0 | For |
| CLEARWATER INVESTMENT TRUST | 38,331 | 0 | 0 | 0 | For |
| Lincoln Financial | 29,655 | 4,845 | 0 | 0 | Mixed |
| MASTER INVESTMENT PORTFOLIO | 29,427 | 0 | 0 | 0 | For |
| ETFis Series Trust I | 27,194 | 0 | 0 | 0 | For |
| Russell Investments | 25,368 | 0 | 0 | 0 | For |
| Northern Trust | 23,852 | 0 | 0 | 0 | For |
| AIG/SunAmerica | 22,023 | 0 | 0 | 0 | For |
Showing the 25 largest of 52 asset managers. See all 52 in the interactive database.
Meeting held November 19, 2025.
Combines 3 wordings of this item as funds reported it.
99.8% Approved · of votes cast
Description as filed by funds: To approve a reduction in the Company's capital to create distributable reserves.
Prothena Corporation plc’s own tally for this item (“1. Approval of a Reduction of the Company's Capital to Create Distributable Reserves”): 37,779,052 for, 46,738 against — passed, per its Form 8-K filed November 19, 2025 (Item 5.07).
Reported outcome: Approved, in the filing’s own words: “The shareholders approved a reduction of the Company's capital to create distributable reserves.”
Support: 99.8% of votes cast — FOR ÷ (FOR + AGAINST); abstentions and broker non-votes are excluded.
The 56 asset managers below reported 12,626,489 for, 8,334 abstained.
| Asset manager | For | Against | Abstain | Withheld | Vote |
|---|---|---|---|---|---|
| Fidelity | 5,445,046 | 0 | 0 | 0 | For |
| Vanguard | 1,822,887 | 0 | 0 | 0 | For |
| BlackRock | 1,789,427 | 0 | 0 | 0 | For |
| Federated Hermes | 659,056 | 0 | 0 | 0 | For |
| TIAA | 623,911 | 0 | 0 | 0 | For |
| Dimensional | 364,455 | 0 | 0 | 0 | For |
| Charles Schwab | 351,005 | 0 | 0 | 0 | For |
| Exchange Place Advisors Trust | 202,755 | 0 | 0 | 0 | For |
| JPMorgan | 173,125 | 0 | 0 | 0 | For |
| Nationwide | 118,622 | 0 | 0 | 0 | For |
| Equitable | 111,638 | 0 | 0 | 0 | For |
| Columbia Threadneedle | 99,559 | 0 | 0 | 0 | For |
| Lincoln Financial | 69,656 | 0 | 0 | 0 | For |
| American Century | 69,290 | 0 | 0 | 0 | For |
| QUANTITATIVE MASTER SERIES LLC | 66,028 | 0 | 0 | 0 | For |
| Goldman Sachs | 50,602 | 0 | 0 | 0 | For |
| GuideStone | 44,567 | 0 | 0 | 0 | For |
| MFS | 42,018 | 0 | 0 | 0 | For |
| T. Rowe Price | 39,441 | 0 | 0 | 0 | For |
| Voya | 36,992 | 0 | 0 | 0 | For |
| Putnam | 30,282 | 0 | 0 | 0 | For |
| SEI | 28,750 | 0 | 0 | 0 | For |
| Brighthouse | 18,252 | 0 | 8,334 | 0 | Mixed |
| ALPS ETF Trust | 25,998 | 0 | 0 | 0 | For |
| Northern Trust | 23,076 | 0 | 0 | 0 | For |
Showing the 25 largest of 56 asset managers. See all 56 in the interactive database.
Meeting held May 14, 2026.
Combines 5 wordings of this item as funds reported it.
97% Approved · of votes cast
Description as filed by funds: To approve, in a non-binding advisory vote, the compensation of the executive officers named in the Company's Proxy Statement for the Annual General Meeting.
Prothena Corporation plc’s own tally for this item (“3. Approval of Compensation of the Company's Named Executive Officers”): 32,303,076 for, 1,145,400 against — passed, per its Form 8-K filed May 15, 2026 (Item 5.07).
Reported outcome: Approved, in the filing’s own words: “The shareholders approved, in a non-binding advisory vote, the compensation of the Company's executive officers named in the Proxy Statement.”
Support: 97% of votes cast — FOR ÷ (FOR + AGAINST); abstentions and broker non-votes are excluded.
Fund voting reports and institutional-manager reports both cover this item. An institutional manager can report shares that a fund it advises also reports, so the two are shown separately below and never added together, and their sum is not shown (fund and manager reports combined may count the same shares twice).
| Asset manager | For | Against | Abstain | Withheld | Vote |
|---|---|---|---|---|---|
| Fidelity | 4,430,354 | 0 | 0 | 0 | For |
| BlackRock | 2,176,327 | 0 | 0 | 0 | For |
| Vanguard | 1,911,942 | 1,353 | 0 | 0 | For |
| State Street | 1,345,028 | 0 | 0 | 0 | For |
| TIAA | 755,110 | 0 | 0 | 0 | For |
| Federated Hermes | 728,422 | 0 | 0 | 0 | For |
| Charles Schwab | 362,188 | 0 | 0 | 0 | For |
| Bridge Builder Trust | 220,592 | 0 | 0 | 0 | For |
| Nationwide | 150,007 | 0 | 0 | 0 | For |
| Equitable | 111,638 | 0 | 0 | 0 | For |
| MFS | 111,437 | 0 | 0 | 0 | For |
| Columbia Threadneedle | 82,422 | 0 | 0 | 0 | For |
| American Century | 0 | 79,685 | 0 | 0 | Against |
| QUANTITATIVE MASTER SERIES LLC | 66,028 | 0 | 0 | 0 | For |
| GuideStone | 60,642 | 0 | 0 | 0 | For |
| Direxion Shares ETF Trust | 57,799 | 0 | 0 | 0 | For |
| Goldman Sachs | 48,210 | 0 | 0 | 0 | For |
| ProShares | 41,190 | 0 | 0 | 0 | For |
| CLEARWATER INVESTMENT TRUST | 38,331 | 0 | 0 | 0 | For |
| Lincoln Financial | 32,445 | 2,055 | 0 | 0 | Mixed |
| MASTER INVESTMENT PORTFOLIO | 29,427 | 0 | 0 | 0 | For |
| ETFis Series Trust I | 27,194 | 0 | 0 | 0 | For |
| Russell Investments | 25,368 | 0 | 0 | 0 | For |
| Northern Trust | 23,852 | 0 | 0 | 0 | For |
| AIG/SunAmerica | 22,023 | 0 | 0 | 0 | For |
Fund voting reports, all 52 managers: 13,015,972 for, 86,018 against. Showing the 25 largest; see all in the interactive database.
| Asset manager | For | Against | Abstain | Withheld | Vote |
|---|---|---|---|---|---|
| Fidelity | 7,319,618 | 0 | 0 | 0 | For |
| BlackRock | 2,440,308 | 54,540 | 0 | 0 | For |
| State Street | 2,110,373 | 1,164 | 0 | 0 | For |
| ACADIAN ASSET MANAGEMENT LLC | 1,126,262 | 0 | 0 | 0 | For |
| Federated Hermes | 1,003,793 | 15,877 | 0 | 0 | For |
| Nuveen | 758,835 | 0 | 0 | 0 | For |
| ADAR1 Capital Management, LLC | 753,455 | 0 | 0 | 0 | For |
| Two Sigma | 689,766 | 0 | 0 | 0 | For |
| GEODE CAPITAL MANAGEMENT, LLC | 687,173 | 0 | 0 | 0 | For |
| JACOBS LEVY EQUITY MANAGEMENT, INC | 567,863 | 0 | 0 | 0 | For |
| DE Shaw | 494,014 | 0 | 0 | 0 | For |
| Charles Schwab | 362,261 | 0 | 0 | 0 | For |
| Vanguard | 263,337 | 0 | 0 | 0 | For |
| Renaissance | 230,320 | 0 | 0 | 0 | For |
| Northern Trust | 216,502 | 0 | 0 | 0 | For |
| T. Rowe Price | 166,246 | 0 | 0 | 0 | For |
| PARAMETRIC PORTFOLIO ASSOCIATES LLC | 165,174 | 0 | 0 | 0 | For |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 151,547 | 0 | 0 | 0 | For |
| MELLON INVESTMENTS Corp | 128,899 | 0 | 0 | 0 | For |
| AQR | 125,211 | 0 | 0 | 0 | For |
| Man Group plc | 108,270 | 0 | 0 | 0 | For |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | 97,036 | 0 | 0 | 0 | For |
| Dimensional | 85,479 | 0 | 0 | 0 | For |
| American Century | 0 | 79,685 | 0 | 0 | Against |
| AllianceBernstein | 69,607 | 0 | 0 | 0 | For |
Institutional-manager reports, all 176 managers: 20,934,078 for, 307,995 against. Showing the 25 largest; see all in the interactive database.
Meeting held May 14, 2026.
Combines 3 wordings of this item as funds reported it.
99.8% Approved · of votes cast
Description as filed by funds: To ratify, in a non-binding vote, the appointment of KPMG LLP as the Company's independent registered public accounting firm for its fiscal year 2026, and to authorize, in a binding vote, the Company's Board of Directors, acting through its Audit Committee, to approve the remuneration of that auditor.
Prothena Corporation plc’s own tally for this item (“2. Ratification of Appointment of the Company's Independent Registered Public Accounting Firm for 2026 and Authorization of the Board of Directors to Approve the Remuneration of that Auditor”): 41,931,718 for, 82,815 against — passed, per its Form 8-K filed May 15, 2026 (Item 5.07).
Reported outcome: Approved, in the filing’s own words: “The shareholders ratified, in a non-binding vote, the appointment of KPMG LLP as the Company's independent registered public accounting firm for its fiscal year ending December 31, 2026, and authorized, in a binding vote, the Company's Board of Directors, acting through its Audit Committee, to appr…”
Support: 99.8% of votes cast — FOR ÷ (FOR + AGAINST); abstentions and broker non-votes are excluded.
The 52 asset managers below reported 13,101,401 for.
| Asset manager | For | Against | Abstain | Withheld | Vote |
|---|---|---|---|---|---|
| Fidelity | 4,430,354 | 0 | 0 | 0 | For |
| BlackRock | 2,176,327 | 0 | 0 | 0 | For |
| Vanguard | 1,913,294 | 0 | 0 | 0 | For |
| State Street | 1,345,028 | 0 | 0 | 0 | For |
| TIAA | 755,110 | 0 | 0 | 0 | For |
| Federated Hermes | 728,422 | 0 | 0 | 0 | For |
| Charles Schwab | 362,188 | 0 | 0 | 0 | For |
| Bridge Builder Trust | 220,592 | 0 | 0 | 0 | For |
| Nationwide | 150,007 | 0 | 0 | 0 | For |
| Equitable | 111,638 | 0 | 0 | 0 | For |
| MFS | 111,437 | 0 | 0 | 0 | For |
| Columbia Threadneedle | 82,422 | 0 | 0 | 0 | For |
| American Century | 79,685 | 0 | 0 | 0 | For |
| QUANTITATIVE MASTER SERIES LLC | 66,028 | 0 | 0 | 0 | For |
| GuideStone | 60,642 | 0 | 0 | 0 | For |
| Direxion Shares ETF Trust | 57,799 | 0 | 0 | 0 | For |
| Goldman Sachs | 48,210 | 0 | 0 | 0 | For |
| ProShares | 41,190 | 0 | 0 | 0 | For |
| CLEARWATER INVESTMENT TRUST | 38,331 | 0 | 0 | 0 | For |
| Lincoln Financial | 34,500 | 0 | 0 | 0 | For |
| MASTER INVESTMENT PORTFOLIO | 29,427 | 0 | 0 | 0 | For |
| ETFis Series Trust I | 27,194 | 0 | 0 | 0 | For |
| Russell Investments | 25,368 | 0 | 0 | 0 | For |
| Northern Trust | 23,852 | 0 | 0 | 0 | For |
| AIG/SunAmerica | 22,023 | 0 | 0 | 0 | For |
Showing the 25 largest of 52 asset managers. See all 52 in the interactive database.
Ranked separately for each type of Form N-PX report. An institutional manager can report shares that a fund it advises also reports, so the two tables can list the same shares and are never added together. Each is ranked by the shares voted on the item that the most managers of that type reported, shown as a share of the 52,353,237 shares outstanding at the time of that meeting.
| # | Asset manager | % of shares outstanding |
|---|---|---|
| 1 | Fidelity | 10.40% |
| 2 | Vanguard | 3.48% |
| 3 | BlackRock | 3.42% |
| 4 | Federated Hermes | 1.26% |
| 5 | TIAA | 1.19% |
| 6 | Dimensional | 0.70% |
| 7 | Charles Schwab | 0.67% |
| 8 | Exchange Place Advisors Trust | 0.39% |
| 9 | JPMorgan | 0.33% |
| 10 | Nationwide | 0.23% |
| # | Asset manager | % of shares outstanding |
|---|---|---|
| 1 | Fidelity | 13.98% |
| 2 | BlackRock | 4.77% |
| 3 | State Street | 4.03% |
| 4 | ACADIAN ASSET MANAGEMENT LLC | 2.15% |
| 5 | Federated Hermes | 1.95% |
| 6 | Nuveen | 1.45% |
| 7 | ADAR1 Capital Management, LLC | 1.44% |
| 8 | Two Sigma | 1.32% |
| 9 | GEODE CAPITAL MANAGEMENT, LLC | 1.31% |
| 10 | JACOBS LEVY EQUITY MANAGEMENT, INC | 1.08% |
As disclosed to the SEC in Form 13F (quarter-end holdings of 30 large managers), Schedules 13D and 13G (beneficial ownership above 5%) and the company’s own proxy statement (DEF 14A). Each row names its form.
| Holder | % outstanding | Disclosure |
|---|---|---|
| Entities Associated with Fidelity Investments | 15.38% | DEF14A |
| FMR (Fidelity) | 14.42% | 13F |
| SCULLY WILLIAM P | 10.27% | 13G |
| William P. Scully | 10.09% | DEF14A |
| Fennell Todd W. | 10.03% | 13G |
| BlackRock | 8.87% | 13F |
| Todd W. Fennell | 8.59% | DEF14A |
| Rubric Capital Management LP | 7.02% | DEF14A |
| Vanguard Group | 4.09% | 13F |
| State Street | 3.70% | 13F |
Percentages above are of 52,353,237 shares outstanding, as reported by Prothena Corporation plc on its Form 10-Q dated April 30, 2026 (see the filing on EDGAR). This is the count contemporaneous with the 2025-2026 meeting, not today’s. Each holding is as of its own filing, which may be dated before or after the meeting.
Every figure above is derived from filings made with the US Securities and Exchange Commission: Form N-PX, in which registered funds disclose how they voted every proxy and institutional managers disclose their votes on executive pay (say-on-pay, say-on-frequency and golden parachutes), and Form 8-K Item 5.07, in which the company reports its own meeting results. Shares outstanding are taken from Prothena Corporation plc’s 10-Q dated April 30, 2026. This page is a static snapshot rebuilt weekly on October 18, 2026; a live search always shows the current data.
At Prothena Corporation plc's 2 shareholder meetings in the 2025-2026 proxy season (held November 19, 2025 and May 14, 2026), 218 asset managers reported how they voted on 5 ballot items in their SEC Form N-PX filings, covering 1,085 separate fund positions. On the most widely held item of the season, voted at the meeting held May 14, 2026 — To approve, in a non-binding advisory vote, the compensation of the executive officers named in… — Prothena Corporation plc's filing reports the proposal as approved, with 97% support of the votes cast (FOR divided by FOR plus AGAINST, the conventional basis for proxy support; abstentions, broker non-votes and unvoted shares are excluded because none of them took a side). Source: Prothena Corporation plc's Form 8-K, Item 5.07, filed with the U.S. Securities and Exchange Commission on May 15, 2026.
Prothena Corporation plc proxy season coverage: 2023-2024 · 2024-2025 · 2025-2026 (this page).
Download data (CSV): ballot items · votes by manager · column guide.