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Disclosery

PRTA PROTHENA CORP PLC

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Stock (common), issuer CIK 1559053

180 managers (186 13F filers) reported a position in PRTA shares at 2026-03-31, 47,280,986 shares in all. 25 filers opened a position and 23 filers sold out during the quarter.

Managers
180
13F filers
186
New
25
Added
68
Reduced
50
Sold out
23
Shares held by filers
47,280,986

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, Q1 2026

Filers in the available 13F reports with a share position at 2026-03-31, 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 LLC7,551,218$73.4M<0.01%013F-HRTimelineGroup
Rubric Capital Management LP5,000,000$48.6M0.6%+1,322,66913F-HRTimeline
BlackRock, Inc.in group BlackRock, Inc.4,644,160$45.1M<0.01%+536,70113F-HRTimelineGroup
VANGUARD GROUP INCgroup of 4 filers holding2,202,927$21.4MnewTimeline
STATE STREET CORPin group STATE STREET CORP1,938,498$18.8M<0.01%-329,30413F-HRTimelineGroup
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.1,763,347$17.1M0.01%+81,97813F-HRTimelineGroup
ADAR1 Capital Management, LLCin group ADAR1 Capital Management, LLC1,581,443$15.4M0.92%+123,67913F-HRTimelineGroup
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC1,547,593$15M0.02%+110,23513F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY1,230,448$12M<0.01%-16,32713F-HRTimelineGroup
Palo Alto Investors LP1,208,568$11.7M1.8%-111,94213F-HRTimeline
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP1,205,978$11.7M0.01%+535,84013F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC1,098,166$10.7M<0.01%+35,09713F-HRTimelineGroup
FEDERATED HERMES, INC.in group FEDERATED HERMES, INC.1,059,849$10.3M0.02%+85,48213F-HRTimelineGroup
JACOBS LEVY EQUITY MANAGEMENT, INC972,017$9.45M0.04%-5,99413F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC818,885$7.96M<0.01%-116,44813F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP782,603$7.61M<0.01%+7,39613F-HRTimelineGroup
Nuveen, LLCin group TIAA759,368$7.38M<0.01%+26113F-HRTimelineGroup
Qube Research & Technologies Ltd614,603$5.97M0.01%+206,91413F-HRTimeline
RENAISSANCE TECHNOLOGIES LLC607,515$5.91M0.01%+172,00013F-HRTimeline
Mariner, LLCin group Mariner, LLC563,082$5.47M0.01%-14,85613F-HRTimelineGroup
MONIMUS CAPITAL MANAGEMENT, LP485,617$4.72M1.31%+231,49513F-HRTimeline
Rangeley Capital, LLC449,460$4.37M4.72%-75,14013F-HRTimeline
Birchview Capital, LP449,019$4.36M2.48%+8,00013F-HRTimeline
ARMISTICE CAPITAL, LLC439,411$4.27M0.14%-1,060,58913F-HRTimeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC435,574$4.23M<0.01%-476,80813F-HRTimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS424,596$4.13M<0.01%+64113F-HRTimelineGroup
Point72 Asset Management, L.P.in group Point72 Asset Management, L.P.399,830$3.89M0.01%-460,18813F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/393,632$3.83M<0.01%-33,72813F-HRTimelineGroup
Man Group plcin group Man Group plc381,574$3.71M0.01%+112,06113F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP369,542$3.59M<0.01%+6,30113F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co356,665$3.47M<0.01%-67013F-HRTimelineGroup
UBS Group AGgroup of 2 filers holding328,622$3.19M-97,738Timeline
Deeter Investments LLP300,000$2.92M0.51%new13F-HRTimeline
Walleye Capital LLCin group Walleye Capital LLC277,168$2.69M0.02%+121,13313F-HR/ATimelineGroup
Penbrook Management LLC271,720$2.64M2%new13F-HRTimeline
Squarepoint Ops LLCin group Squarepoint Ops LLC230,920$2.24M<0.01%+12,87913F-HRTimelineGroup
Focused Wealth Management, Inc207,403$2.02M0.21%+99,92413F-HRTimeline
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC204,016$1.98M<0.01%+17,23113F-HRTimelineGroup
Connor, Clark & Lunn Investment Managem…156,551$1.52M<0.01%+30,66113F-HRTimeline
Quantinno Capital Management LP144,299$1.4M<0.01%+40,68113F-HRTimeline
Campbell & CO Investment Adviser LLC142,587$1.39M0.08%+48,43213F-HRTimeline
Bank of New York Mellon Corpin group Bank of New York Mellon Corp136,322$1.33M<0.01%+3,62213F-HRTimelineGroup
MASSACHUSETTS FINANCIAL SERVICES CO /MA/in group MASSACHUSETTS FINANCIAL SERVI…132,051$1.28M<0.01%+86,08113F-HRTimelineGroup
Jump Financial, LLCin group Jump Financial, LLC118,936$1.16M0.02%-118,89213F-HRTimelineGroup
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC107,926$1.05M<0.01%-320,72513F-HRTimelineGroup
Y-Intercept (Hong Kong) Ltd100,805$980K0.02%+29513F-HRTimeline
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…100,627$978K<0.01%+1,27713F-HRTimelineGroup
PRICE T ROWE ASSOCIATES INC /MD/95,649$930K<0.01%+14,13413F-HRTimeline
XTX Topco Ltdin group XTX Topco Ltd92,326$897K0.02%+37,44513F-HRTimelineGroup
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC89,212$867K<0.01%-16,22913F-HR/ATimelineGroup
Hennion & Walsh Asset Management, Inc.88,544$861K0.03%-2,74013F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPgroup of 2 filers holding85,662$833K+10,834Timeline
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC79,631$774K<0.01%+82713F-HRTimelineGroup
Assenagon Asset Management S.A.76,769$746K<0.01%013F-HRTimeline
DCF Advisers, LLC73,247$712K0.27%-122,50013F-HRTimeline
Creative Planningin group Creative Planning72,986$709K<0.01%+11,01713F-HRTimelineGroup
Duncan Williams Asset Management, LLC70,281$683K0.19%013F-HRTimeline
MARTINGALE ASSET MANAGEMENT L P69,101$672K0.02%+5,64813F-HRTimeline
ALLIANCEBERNSTEIN L.P.69,607$665K<0.01%013F-HRTimeline
HSBC HOLDINGS PLCin group HSBC HOLDINGS PLC65,070$632K<0.01%+37,33713F-HRTimelineGroup
PINNACLE ASSOCIATES LTD60,662$590K0.01%-2,06213F-HRTimeline
RHUMBLINE ADVISERS55,367$538K<0.01%-1,16013F-HRTimeline
Jackson Creek Investment Advisors LLC54,089$526K0.15%new13F-HRTimeline
Rafferty Asset Management, LLC53,266$518K<0.01%-29,28713F-HRTimeline
EDGEWOOD MANAGEMENT LLC50,000$486K<0.01%+25,94013F-HRTimeline
Quinn Opportunity Partners LLC50,000$486K0.03%013F-HRTimeline
Invesco Ltd.in group Invesco Ltd.49,808$484K<0.01%+23,19913F-HRTimelineGroup
MARSHALL WACE, LLPin group MARSHALL WACE, LLP44,574$433K<0.01%-10,20413F-HRTimelineGroup
Seven Fleet Capital Management LP43,300$421K0.13%013F-HR/ATimeline
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF O…42,158$410K<0.01%013F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC40,862$397K<0.01%-142,76313F-HRTimelineGroup
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\40,018$389K<0.01%+4,53613F-HRTimelineGroup
WINTON GROUP Ltdin group WINTON GROUP Ltd34,700$337K0.01%new13F-HRTimelineGroup
FOX RUN MANAGEMENT, L.L.C.35,052$324K0.06%+25,00713F-HRTimeline
Covestor Ltd32,657$317K0.22%+10,86413F-HRTimeline
GSA CAPITAL PARTNERS LLP32,499$316K0.02%+6,14513F-HRTimeline
Cornerstone Investment Partners, LLC30,687$298K0.01%new13F-HRTimeline
GREAT LAKES ADVISORS, LLC29,593$288K<0.01%+16,40413F-HRTimeline
RBF Capital, LLC29,200$284K0.01%013F-HR/ATimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…28,386$276K<0.01%+25813F-HRTimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN27,337$266K<0.01%-32,77113F-HR/ATimelineGroup
Mirae Asset Global Investments Co., Ltd.group of 2 filers holding27,447$265K-409Timeline
Virtus Investment Advisers, LLCin group Virtus Investment Advisers, L…26,320$256K0.07%+64113F-HRTimelineGroup
Purkiss Capital Advisors LLC25,086$244K0.11%013F-HRTimeline
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO25,967$240K<0.01%-143,98813F-HR/ATimelineGroup
Trexquant Investment LP24,543$239K<0.01%+5,15913F-HRTimeline
TUDOR INVESTMENT CORP ET AL24,471$238K<0.01%-2,00213F-HRTimeline
LOS ANGELES CAPITAL MANAGEMENT LLC24,419$237K<0.01%-70,98713F-HRTimeline
PROFUND ADVISORS LLC24,005$233K0.01%-6,61113F-HRTimeline
MOGY JOEL R INVESTMENT COUNSEL INC20,750$202K0.01%013F-HRTimeline
MetLife Investment Management, LLCin group MetLife Investment Management…19,516$190K<0.01%-5,98513F-HRTimelineGroup
Foundation Wealth Management, LLC19,236$187K0.13%new13F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP19,409$180K<0.01%+3,50913F-HRTimelineGroup
SEI INVESTMENTS COin group SEI INVESTMENTS CO17,248$168K<0.01%new13F-HRTimelineGroup
Chicago Partners Investment Group LLC15,365$165K<0.01%+14313F-HRTimeline
Ballentine Partners, LLC16,793$163K<0.01%-1,27713F-HRTimeline
STATE BOARD OF ADMINISTRATION OF FLORID…15,386$150K<0.01%013F-HRTimeline
CHICAGO TRUST Co NA15,057$146K0.02%new13F-HRTimeline
Brooklyn Investment Group14,993$146K<0.01%+2,94613F-HRTimeline
STRS OHIO14,700$143K<0.01%-2,90013F-HRTimeline
SG Americas Securities, LLC13,522$131K<0.01%-49,49613F-HRTimeline
MERCER GLOBAL ADVISORS INC /ADV13,094$127K<0.01%new13F-HRTimeline
Graham Capital Management, L.P.12,820$125K<0.01%-14,93613F-HRTimeline
CARY STREET PARTNERS FINANCIAL LLCin group CARY STREET PARTNERS ASSET MA…12,500$122K<0.01%013F-HRTimelineGroup
Police & Firemen's Retirement System of…12,453$121K<0.01%013F-HRTimeline
Schonfeld Strategic Advisors LLC12,399$121K<0.01%new13F-HRTimeline
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …12,184$118K<0.01%-1,51113F-HRTimelineGroup
COMMONWEALTH EQUITY SERVICES, LLC11,930$116K<0.01%new13F-HRTimeline
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC11,884$116K<0.01%-4,59913F-HRTimelineGroup
INTECH INVESTMENT MANAGEMENT LLC11,874$115K<0.01%-8,72713F-HRTimeline
ExodusPoint Capital Management, LP11,172$109K<0.01%-76,81813F-HRTimeline
Inscription Capital, LLC10,480$102K0.01%-17213F-HRTimeline
JBF Capital, Inc.10,285$100K0.01%new13F-HRTimeline
CWM, LLCin group CWM, LLC10,276$99.9K<0.01%+18113F-HRTimelineGroup
Savant Capital, LLCin group Savant Capital, LLC10,131$98.5K<0.01%new13F-HRTimelineGroup
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC10,025$97.4K<0.01%new13F-HRTimelineGroup
Vontobel Holding Ltd.in group Vontobel Holding Ltd.10,000$97.2K<0.01%new13F-HRTimelineGroup
Cresset Asset Management, LLC10,000$97.2K<0.01%new13F-HRTimeline
China Universal Asset Management Co., L…9,553$92.9K0.01%+78113F-HRTimeline
NEW YORK STATE COMMON RETIREMENT FUND8,979$87.3K<0.01%013F-HRTimeline
CITIGROUP INCin group CITIGROUP INC8,150$79.2K<0.01%-4,16813F-HRTimelineGroup
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION…6,552$64K<0.01%013F-HRTimeline
Pinnacle Wealth Planning Services, Inc.5,668$55.1K0.01%013F-HRTimeline
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…5,613$54.6K<0.01%+1,02313F-HRTimelineGroup
BROWN BROTHERS HARRIMAN & COin group BROWN BROTHERS HARRIMAN & CO5,000$48.6K<0.01%013F-HRTimelineGroup
SIGNATUREFD, LLC4,727$45.9K<0.01%+1,11813F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…4,637$45.1K<0.01%+1,81113F-HRTimelineGroup
Legal & General Group Plcin group Legal & General Group Plc3,973$38.6K<0.01%-7113F-HRTimelineGroup
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…3,428$33.3K<0.01%013F-HRTimelineGroup
GROUP ONE TRADING LLC3,416$33.2K<0.01%new13F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA3,171$30K<0.01%-1,25613F-HRTimelineGroup
Farther Finance Advisors, LLC2,734$27.4K<0.01%+30013F-HRTimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…2,383$23.2K<0.01%-32713F-HRTimeline
Versant Capital Management, Inc2,192$21.3K<0.01%+14813F-HRTimeline
GAMMA Investing LLC2,155$20.9K<0.01%+1,64513F-HRTimeline
Federation des caisses Desjardins du Qu…2,000$19.4K<0.01%+1,00013F-HRTimeline
Sterling Capital Management LLC1,348$13.1K<0.01%-97913F-HRTimeline
SIMPLEX TRADING, LLC1,303$12.7K<0.01%-62413F-HRTimeline
GF FUND MANAGEMENT CO. LTD.1,199$11.7K<0.01%+14213F-HRTimeline
Allworth Financial LP946$9.2K<0.01%+6113F-HRTimeline
HighMark Wealth Management LLC900$8.75K<0.01%013F-HRTimeline
QUADRANT CAPITAL GROUP LLC841$8.18K<0.01%-41913F-HR/ATimeline
HM PAYSON & CO600$5.83K<0.01%013F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\418$4.06K<0.01%+5913F-HRTimelineGroup
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.372$3.61K<0.01%+13513F-HRTimelineGroup
Essential Partners LLC333$3.24K<0.01%013F-HRTimeline
Aster Capital Management (DIFC) Ltd256$3.17K<0.01%new13F-HRTimeline
Optiver Holding B.V.in group Optiver Holding B.V.297$2.89K<0.01%+113F-HR/ATimelineGroup
Parallel Advisors, LLC296$2.88K<0.01%+11713F-HR/ATimeline
Evelyn Partners Investment Management L…in group Evelyn Partners Group Ltd199$1.93K<0.01%013F-HRTimelineGroup
Basecamp Wealth Advisors LLC197$1.92K<0.01%013F-HRTimeline
Asset Dedication, LLC184$1.79K<0.01%013F-HRTimeline
Larson Financial Group LLC167$1.62K<0.01%+14113F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…160$1.55K<0.01%+7013F-HR/ATimelineGroup
SITTNER & NELSON, LLC155$1.51K<0.01%-3013F-HRTimeline
Johnson Financial Group, Inc.in group Johnson Financial Group, Inc.151$1.47K<0.01%013F-HRTimelineGroup
ALBION FINANCIAL GROUP /UT125$1.22K<0.01%013F-HRTimeline
NISA INVESTMENT ADVISORS, LLC112$1.09K<0.01%013F-HRTimeline
CVA Family Office, LLC109$1.06K<0.01%new13F-HRTimeline
True Wealth Design, LLC103$1K<0.01%013F-HRTimeline
HARBOR INVESTMENT ADVISORY, LLC100$972<0.01%013F-HRTimeline
Gould Capital, LLC100$972<0.01%013F-HRTimeline
Arax Advisory Partners92$895<0.01%+7913F-HRTimeline
Keating Financial Advisory Services, In…76$739<0.01%new13F-HRTimeline
Cornerstone Financial Management LLC55$535<0.01%new13F-HR/ATimeline
NORTHWESTERN MUTUAL WEALTH MANAGEMENT COin group NORTHWESTERN MUTUAL INVESTMEN…50$486<0.01%-413F-HRTimelineGroup
Root Financial Partners, LLC38$369<0.01%new13F-HRTimeline
Blue Trust, Inc.33$321<0.01%013F-HRTimeline
Advisory Services Network, LLC30$292<0.01%new13F-HRTimeline
CoreCap Advisors, LLC23$224<0.01%013F-HRTimeline
Leo H. Evart, Inc.22$214<0.01%13F-HR/ATimeline
Caitong International Asset Management …20$194<0.01%-313F-HRTimeline
IFP Advisors, Inc15$146<0.01%013F-HRTimeline
SBI Securities Co., Ltd.15$146<0.01%013F-HRTimeline
Key Financial Inc12$117<0.01%013F-HRTimeline
MAI Capital Management10$98<0.01%013F-HRTimeline
Steward Partners Investment Advisory, L…6$58<0.01%013F-HRTimeline
Clearstead Advisors, LLC4$39<0.01%-613F-HRTimeline
HARBOUR INVESTMENTS, INC.1$10<0.01%013F-HRTimeline
Wealth Preservation Advisors, LLC1$10<0.01%new13F-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