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Disclosery

PRTA PROTHENA CORP PLC

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Stock (common), issuer CIK 1559053

184 managers (187 13F filers) reported a position in PRTA shares at 2025-09-30, 42,605,129 shares in all. 31 filers opened a position and 33 filers sold out during the quarter.

Managers
184
13F filers
187
New
31
Added
58
Reduced
61
Sold out
33
Shares held by filers
42,605,129

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

The latest Form 4 transactions, non-derivative.
OwnerDateSharesPriceFiling
SCULLY WILLIAM P10% owner2026-10-08+90,000 P$8.5656Form 4
SCULLY WILLIAM P10% owner2026-10-07+125,000 P$8.4012Form 4
SCULLY WILLIAM P10% owner2026-10-02+100,000 P$8.5724Form 4

13F holders, Q3 2025

Filers in the available 13F reports with a share position at 2025-09-30, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
FMR LLCin group FMR LLC7,901,218$77.1M<0.01%013F-HRTimelineGroup
BlackRock, Inc.in group BlackRock, Inc.3,598,417$35.1M<0.01%-340,98113F-HRTimelineGroup
VANGUARD GROUP INCin group VANGUARD GROUP INC2,049,849$20M<0.01%-126,37813F-HRTimelineGroup
ARMISTICE CAPITAL, LLC1,824,000$17.8M0.56%-412,00013F-HRTimeline
Rubric Capital Management LP1,540,373$15M0.2%new13F-HRTimeline
ADAR1 Capital Management, LLCin group ADAR1 Capital Management, LLC1,469,098$14.3M1.42%-1,905,91113F-HRTimelineGroup
Palo Alto Investors LP1,324,028$12.9M2.39%+49,27513F-HRTimeline
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.1,315,418$12.8M0.01%+923,92313F-HRTimelineGroup
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC1,239,242$12.1M0.02%+221,06513F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC1,019,483$9.95M<0.01%+86,03713F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP901,038$8.79M<0.01%-103,96413F-HRTimelineGroup
JACOBS LEVY EQUITY MANAGEMENT, INC876,528$8.55M0.03%+183,37413F-HRTimeline
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP806,988$7.88M<0.01%-155,35113F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY799,674$7.8M<0.01%-153,58213F-HR/ATimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC767,105$7.49M0.01%-380,51713F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO735,765$7.18M<0.01%+608,81413F-HR/ATimelineGroup
FEDERATED HERMES, INC.in group FEDERATED HERMES, INC.692,818$6.76M0.01%-488,26913F-HRTimelineGroup
TWO SIGMA INVESTMENTS, LPgroup of 2 filers holding692,305$6.76M+351,055Timeline
Nuveen, LLCin group TIAA668,290$6.52M<0.01%+546,13513F-HRTimelineGroup
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPin group ARROWSTREET CAPITAL, LIMITED …654,294$6.39M<0.01%new13F-HRTimelineGroup
Point72 Asset Management, L.P.in group Point72 Asset Management, L.P.646,746$6.31M0.01%new13F-HRTimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC621,099$6.06M<0.01%+450,52013F-HRTimelineGroup
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC619,792$6.05M0.01%+502,33913F-HRTimelineGroup
Mariner, LLCin group Mariner, LLC590,897$5.77M0.01%+204,18913F-HRTimelineGroup
Rangeley Capital, LLC560,457$5.47M5.14%-154,91013F-HRTimeline
Birchview Capital, LP549,019$5.36M4.05%+98,00013F-HRTimeline
ALGERT GLOBAL LLC445,811$4.35M0.07%+397,66113F-HR/ATimeline
UBS Group AGgroup of 2 filers holding400,847$3.91M+200,899Timeline
RENAISSANCE TECHNOLOGIES LLC371,300$3.62M<0.01%+281,10013F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC353,221$3.45M<0.01%-175,10213F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co350,821$3.42M<0.01%+75,73713F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP334,657$3.27M<0.01%+10313F-HRTimelineGroup
Trexquant Investment LP278,979$2.72M0.03%-273,84713F-HRTimeline
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/277,096$2.7M<0.01%+66,15113F-HR/ATimelineGroup
MONIMUS CAPITAL MANAGEMENT, LP258,056$2.52M1.87%+51,58113F-HRTimeline
Qube Research & Technologies Ltd254,245$2.48M<0.01%-160,58313F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS228,010$2.23M<0.01%+181,16613F-HRTimelineGroup
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC214,542$2.09M<0.01%new13F-HRTimelineGroup
DCF Advisers, LLC200,747$1.96M0.74%+44,24713F-HRTimeline
Cubist Systematic Strategies, LLC190,949$1.86M0.03%-310,81513F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPgroup of 3 filers holding186,422$1.82M-14,787Timeline
Jump Financial, LLCin group Jump Financial, LLC186,247$1.82M0.02%new13F-HR/ATimelineGroup
Bank of New York Mellon Corpin group Bank of New York Mellon Corp153,800$1.5M<0.01%+5,45013F-HRTimelineGroup
Man Group plcin group Man Group plc131,973$1.29M<0.01%+89,22113F-HRTimelineGroup
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…127,757$1.25M<0.01%+31,56113F-HRTimelineGroup
Squarepoint Ops LLCin group Squarepoint Ops LLC127,033$1.24M<0.01%-82,21613F-HRTimelineGroup
LOS ANGELES CAPITAL MANAGEMENT LLC119,424$1.17M<0.01%+102,72213F-HRTimeline
Janney Montgomery Scott LLC106,898$1.04M<0.01%new13F-HRTimeline
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC105,536$1.03M<0.01%-46,00713F-HRTimelineGroup
Quantinno Capital Management LP101,187$988K<0.01%+41,56913F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC98,075$957K<0.01%-17,77313F-HR/ATimelineGroup
Assenagon Asset Management S.A.89,704$876K<0.01%new13F-HRTimeline
Duncan Williams Asset Management, LLC88,339$862K0.24%013F-HRTimeline
Hennion & Walsh Asset Management, Inc.84,598$826K0.03%-1,55613F-HRTimeline
PRICE T ROWE ASSOCIATES INC /MD/78,547$767K<0.01%+7,50013F-HRTimeline
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC72,239$705K<0.01%+12,27413F-HRTimelineGroup
PINNACLE ASSOCIATES LTD71,261$696K0.01%-2,81813F-HRTimeline
Monaco Asset Management SAM70,000$683K0.25%013F-HRTimeline
ALLIANCEBERNSTEIN L.P.69,607$679K<0.01%-17,98013F-HRTimeline
Creative Planningin group Creative Planning64,140$626K<0.01%+13,57113F-HRTimelineGroup
RHUMBLINE ADVISERS62,042$606K<0.01%-96313F-HRTimeline
FRANKLIN RESOURCES INCin group Franklin Resources61,172$597K<0.01%+5,09413F-HRTimelineGroup
Caption Management, LLC61,009$595K0.03%-4,09113F-HRTimeline
Focused Wealth Management, Inc57,129$558K0.06%+25,00013F-HRTimeline
SG Americas Securities, LLC56,719$554K<0.01%+4,77813F-HRTimeline
Engineers Gate Manager LP56,080$547K0.01%+15,11313F-HRTimeline
Balyasny Asset Management L.P.in group Balyasny Asset Management55,764$544K<0.01%-520,02813F-HRTimelineGroup
Graham Capital Management, L.P.53,393$521K0.02%+19,35113F-HRTimeline
Quinn Opportunity Partners LLC50,000$488K0.04%013F-HRTimeline
MASSACHUSETTS FINANCIAL SERVICES CO /MA/in group MASSACHUSETTS FINANCIAL SERVI…47,489$463K<0.01%+3,12513F-HRTimelineGroup
FOX RUN MANAGEMENT, L.L.C.44,332$433K0.07%new13F-HRTimeline
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF O…42,158$411K<0.01%013F-HRTimeline
SIMPLEX TRADING, LLC42,044$410K0.01%-1,22013F-HRTimeline
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN40,430$395K<0.01%-79013F-HRTimelineGroup
HSBC HOLDINGS PLCin group HSBC HOLDINGS PLC37,432$365K<0.01%-8,61513F-HRTimelineGroup
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\33,773$330K<0.01%-5,82813F-HRTimelineGroup
Covestor Ltd31,432$307K0.17%-10,86313F-HRTimeline
Invesco Ltd.in group Invesco Ltd.31,303$306K<0.01%-5,58213F-HRTimelineGroup
HRT FINANCIAL LP31,106$303K<0.01%new13F-HRTimeline
ExodusPoint Capital Management, LP30,254$295K<0.01%-28,66413F-HRTimeline
Proficio Capital Partners LLC30,136$294K0.02%new13F-HR/ATimeline
BOOTHBAY FUND MANAGEMENT, LLC30,000$293K0.01%new13F-HRTimeline
Arizona PSPRS Trust27,700$293K0.01%new13F-HRTimeline
Sandia Investment Management LP29,950$292K0.87%new13F-HRTimeline
RBF Capital, LLC29,200$285K0.01%013F-HRTimeline
STRS OHIO28,800$281K<0.01%+12,40013F-HRTimeline
Cambridge Investment Research Advisors,…27,513$269K<0.01%+20213F-HRTimeline
Quadrature Capital Ltdin group Quadrature Capital Ltd27,215$265K<0.01%+3,46313F-HRTimelineGroup
TUDOR INVESTMENT CORP ET AL27,073$264K<0.01%-92613F-HR/ATimeline
ALPS ADVISORS INCin group ALPS ADVISORS INC25,727$251K<0.01%-3,30113F-HRTimelineGroup
Rock Springs Capital Management LP25,398$248K0.01%-467,20313F-HRTimeline
Purkiss Capital Advisors LLC25,386$248K0.12%+48213F-HRTimeline
EDGEWOOD MANAGEMENT LLC24,060$235K<0.01%013F-HRTimeline
Virtus Investment Advisers, LLCin group Virtus Investment Advisers, L…22,443$219K0.06%+3,89613F-HRTimelineGroup
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC22,032$215K<0.01%+8,53613F-HRTimelineGroup
Atom Investors LP21,315$208K0.02%new13F-HRTimeline
Mirae Asset Global Investments Co., Ltd.group of 2 filers holding20,915$204K-2,382Timeline
Handelsbanken Fonder AB20,900$204K<0.01%013F-HRTimeline
MOGY JOEL R INVESTMENT COUNSEL INC20,750$203K0.01%013F-HRTimeline
Prosight Management, LP20,000$195K0.05%-247,80013F-HRTimeline
Foundation Wealth Management, LLC19,471$190K0.12%013F-HRTimeline
INTECH INVESTMENT MANAGEMENT LLC19,388$189K<0.01%+1,01413F-HRTimeline
MetLife Investment Management, LLCin group MetLife Investment Management…19,362$189K<0.01%-6,04013F-HRTimelineGroup
Ballentine Partners, LLC18,310$179K<0.01%new13F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…18,137$177K<0.01%+10913F-HRTimelineGroup
Chicago Partners Investment Group LLC14,841$156K<0.01%+8213F-HRTimeline
XTX Topco Ltdin group XTX Topco Ltd15,808$154K0.01%new13F-HRTimelineGroup
STATE BOARD OF ADMINISTRATION OF FLORID…15,386$150K<0.01%013F-HRTimeline
Corton Capital Inc.14,208$139K0.34%+24413F-HRTimeline
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …13,867$135K<0.01%-1,27313F-HRTimelineGroup
DekaBank Deutsche Girozentrale14,000$134K<0.01%013F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP14,000$132K<0.01%013F-HRTimelineGroup
GREAT LAKES ADVISORS, LLC13,284$130K<0.01%new13F-HRTimeline
Thrivent Financial for Lutheransin group Thrivent Financial for Luther…12,980$127K<0.01%-25,64613F-HRTimelineGroup
CARY STREET PARTNERS FINANCIAL LLCin group CARY STREET PARTNERS ASSET MA…12,500$122K<0.01%013F-HRTimelineGroup
Police & Firemen's Retirement System of…12,464$122K<0.01%+2,35113F-HRTimeline
Y-Intercept (Hong Kong) Ltd12,171$119K<0.01%new13F-HRTimeline
Jain Global LLC11,780$115K<0.01%-6,48213F-HRTimeline
OPPENHEIMER & CO INCin group OPPENHEIMER ASSET MANAGEMENT …11,660$114K<0.01%-6,93513F-HRTimelineGroup
Inscription Capital, LLC10,480$102K0.01%new13F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA10,331$101K<0.01%-95,60813F-HRTimelineGroup
CWM, LLCin group CWM, LLC10,246$100K<0.01%+8,88013F-HRTimelineGroup
China Universal Asset Management Co., L…9,436$92.1K0.01%-1,37513F-HRTimeline
NEW YORK STATE COMMON RETIREMENT FUND8,979$87.6K<0.01%013F-HRTimeline
GROUP ONE TRADING LLC6,949$67.8K<0.01%-25,30913F-HRTimeline
Brooklyn Investment Group11,113$67.6K0.01%013F-HR/ATimeline
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION…6,552$64K<0.01%013F-HRTimeline
Point72 (DIFC) Ltd5,847$57.1K<0.01%-18,09913F-HRTimeline
Arax Advisory Partners5,384$52.5K<0.01%new13F-HRTimeline
BROWN BROTHERS HARRIMAN & COin group BROWN BROTHERS HARRIMAN & CO5,000$48.8K<0.01%013F-HRTimelineGroup
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…4,405$43K<0.01%new13F-HRTimelineGroup
SIGNATUREFD, LLC3,670$35.8K<0.01%+31313F-HRTimeline
Legal & General Group Plcin group Legal & General Group Plc3,599$35.1K<0.01%-5,72413F-HRTimelineGroup
CITIGROUP INCin group CITIGROUP INC3,592$35.1K<0.01%-45,71113F-HRTimelineGroup
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…3,428$33.5K<0.01%-94013F-HRTimelineGroup
Sterling Capital Management LLC2,547$24.9K<0.01%+1,58813F-HRTimeline
Farther Finance Advisors, LLC2,434$23.8K<0.01%-2313F-HRTimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…2,415$23.6K<0.01%-30,82813F-HRTimeline
Versant Capital Management, Inc2,044$19.9K<0.01%013F-HRTimeline
HighMark Wealth Management LLC2,008$19.6K0.01%-1013F-HRTimeline
FLAGSHIP WEALTH ADVISORS, LLC1,500$14.6K<0.01%013F-HRTimeline
AMALGAMATED BANK1,440$14K<0.01%013F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…1,285$12.5K<0.01%-11,42413F-HRTimelineGroup
QUADRANT CAPITAL GROUP LLC1,260$12.3K<0.01%new13F-HRTimeline
GF FUND MANAGEMENT CO. LTD.1,155$11.3K<0.01%-22213F-HRTimeline
Allworth Financial LP865$8.44K<0.01%+49313F-HRTimeline
HM PAYSON & CO600$5.86K<0.01%013F-HRTimeline
NISA INVESTMENT ADVISORS, LLC592$5.78K<0.01%+6613F-HRTimeline
Point72 Europe (London) LLP531$5.18K<0.01%new13F-HRTimeline
GAMMA Investing LLC386$3.77K<0.01%+18913F-HRTimeline
Optiver Holding B.V.in group Optiver Holding B.V.352$3.44K<0.01%new13F-HRTimelineGroup
Essential Partners LLC333$3.25K<0.01%new13F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\314$3.06K<0.01%-8,71713F-HRTimelineGroup
Manchester Capital Management LLC250$2.44K<0.01%013F-HRTimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.243$2.3K<0.01%-413F-HRTimelineGroup
CVA Family Office, LLC225$2.2K<0.01%+15313F-HRTimeline
Daiwa Securities Group Inc.in group Daiwa Securities Group Inc.195$2K<0.01%013F-HRTimelineGroup
Evelyn Partners Investment Management L…in group Evelyn Partners Group Ltd199$1.94K<0.01%013F-HRTimelineGroup
Asset Dedication, LLC184$1.8K<0.01%013F-HRTimeline
Parallel Advisors, LLC179$1.75K<0.01%-41413F-HRTimeline
North Capital, Inc.159$1.55K<0.01%013F-HRTimeline
SITTNER & NELSON, LLC155$1.51K<0.01%013F-HRTimeline
Johnson Financial Group, Inc.in group Johnson Financial Group, Inc.151$1.47K<0.01%new13F-HRTimelineGroup
ALBION FINANCIAL GROUP /UT125$1.22K<0.01%013F-HRTimeline
True Wealth Design, LLC103$1.01K<0.01%new13F-HRTimeline
HARBOR INVESTMENT ADVISORY, LLC100$976<0.01%013F-HRTimeline
Gould Capital, LLC100$976<0.01%013F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…90$879<0.01%new13F-HRTimelineGroup
Zurcher Kantonalbank (Zurich Cantonalba…71$693<0.01%-15,49713F-HRTimeline
Walleye Capital LLCin group Walleye Capital LLC63$615<0.01%-1,99513F-HRTimelineGroup
NORTHWESTERN MUTUAL WEALTH MANAGEMENT COin group NORTHWESTERN MUTUAL INVESTMEN…50$488<0.01%new13F-HRTimelineGroup
CIBC Private Wealth Group LLCin group CIBC Bancorp USA Inc.48$468<0.01%-113F-HRTimelineGroup
Blue Trust, Inc.33$322<0.01%013F-HRTimeline
SBI Securities Co., Ltd.29$283<0.01%-93313F-HRTimeline
CoreCap Advisors, LLC23$224<0.01%013F-HRTimeline
Clearstead Advisors, LLC21$205<0.01%+1713F-HRTimeline
IFP Advisors, Inc15$146<0.01%+1513F-HR/ATimeline
Key Financial Inc12$119<0.01%013F-HRTimeline
Lowe Wealth Advisors, LLC10$98<0.01%013F-HRTimeline
Glen Eagle Advisors, LLC10$98<0.01%new13F-HRTimeline
Steward Partners Investment Advisory, L…6$59<0.01%013F-HRTimeline
Larson Financial Group LLC6$59<0.01%new13F-HRTimeline
HARBOUR INVESTMENTS, INC.1$10<0.01%013F-HRTimeline
Truvestments Capital LLC1$9<0.01%-6813F-HRTimeline

Events

  • SCULLY WILLIAM P bought 215,000 PRTA shares between 2026-10-07 and 2026-10-08, Form 4 filed 2026-10-09. 0001045463-26-000020

    Accepted , ingested

  • SCULLY WILLIAM P bought 100,000 PRTA shares on 2026-10-02, Form 4 filed 2026-10-06. 0001045463-26-000019

    Accepted , ingested