13FBOX
PROTHENA CORP PLC · 13F Institutional Holdings
Options Calculator Rankings
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PROTHENA CORP PLC

PRTA
Institutions
193
Combined AUM (Q2 2026)
$479.0M
Combined Shares (Q2 2026)
48.7M
Overall Trend
Increase
All institutions combined
Basis: holder count and combined value / shares merge all share classes of the same company (e.g. Class A / C); each institution is counted once, and value & shares are the sum across classes.
📥 Inflow (Q1 2026→Q2 2026)
+4.8M
90 institutions added · 30 new buys
Est. buy amount
📤 Outflow (Q1 2026→Q2 2026)
-3.3M
80 institutions reduced · 23 exits
Est. sell amount
⚖️ Net Share Change
+1.5M
Net Buy
💰 Est. Net Value
≈ —
est. price
Latest AUM (Q2 2026)
$479.0M
Institutions
193
New Buys
30
Adds
60
Reduces
57
Exits
23
Unchanged
46
Ownership TrendPortfolio %Prev Q %RankQ2 2026 ValueQ2 2026 SharesPrev Q ValuePrev Q SharesShares ChangeAction
FMR LLC
<0.01%<0.01%#56$70.5M7.2M$73.4M7.6M-352,000-4.66%Reduce
Rubric Capital Management LP
0.45%0.51%#7$49.0M5.0M$48.6M5.0M00.00%Unchanged
BlackRock, Inc.
<0.01%<0.01%#90$47.7M4.9M$45.1M4.6M+223,795+4.82%Add
STATE STREET CORP
<0.01%<0.01%#91$23.4M2.4M$18.8M1.9M+454,926+23.47%Add
ACADIAN ASSET MANAGEMENT LLC
0.02%0.02%#24$19.7M2.0M$15.0M1.5M+463,052+29.92%Add
VANGUARD PORTFOLIO MANAGEMENT LLC
<0.01%<0.01%#89$16.2M1.7M$14.1M1.4M+205,314+14.20%Add
D. E. Shaw & Co., Inc.
0.01%0.01%#41$15.8M1.6M$17.1M1.8M-151,890-8.61%Reduce
ADAR1 Capital Management, LLC
0.7%0.9%#6$15.2M1.6M$15.4M1.6M-26,908-1.70%Reduce
TWO SIGMA INVESTMENTS, LP
0.01%0.01%#39$12.4M1.3M$11.7M1.2M+59,009+4.89%Add
Palo Alto Investors LP
1.64%1.8%#4$11.2M1.1M$11.7M1.2M-65,413-5.41%Reduce
GEODE CAPITAL MANAGEMENT, LLC
<0.01%<0.01%#95$11.0M1.1M$10.7M1.1M+27,711+2.52%Add
FEDERATED HERMES, INC.
0.02%0.02%#29$10.6M1.1M$10.3M1.1M+24,552+2.32%Add
MORGAN STANLEY
<0.01%<0.01%#101$9.7M995,348$7.8M799,674+195,674+24.47%Add
GOLDMAN SACHS GROUP INC
<0.01%<0.01%#87$9.6M979,730$8.0M818,885+160,845+19.64%Add
JACOBS LEVY EQUITY MANAGEMENT, INC
0.03%0.04%#22$9.5M965,988$9.4M972,017-6,029-0.62%Reduce
DIMENSIONAL FUND ADVISORS LP
<0.01%<0.01%#68$8.9M905,651$7.6M782,603+123,048+15.72%Add
Qube Research & Technologies Ltd
0.01%0.01%#42$7.7M791,169$6.0M614,603+176,566+28.73%Add
RENAISSANCE TECHNOLOGIES LLC
0.01%0.01%#38$6.8M697,615$5.9M607,515+90,100+14.83%Add
Man Group plc
0.01%0.01%#35$6.6M678,116$3.7M381,574+296,542+77.72%Add
Mariner, LLC
0.01%0.01%#44$6.1M625,095$5.5M563,082+62,013+11.01%Add
CITADEL ADVISORS LLC
<0.01%<0.01%#92$5.9M598,010$5.6M572,774+25,236+4.41%Add
Nuveen, LLC
<0.01%<0.01%#72$5.5M557,157$7.4M759,368-202,211-26.63%Reduce
SUSQUEHANNA INTERNATIONAL GROUP, LLP
<0.01%<0.01%#109$4.8M486,900$1.8M183,892+303,008+164.77%Add
VANGUARD CAPITAL MANAGEMENT LLC
<0.01%<0.01%#145$4.7M479,945$4.7M484,126-4,181-0.86%Reduce
NORTHERN TRUST CORP
<0.01%<0.01%#100$4.5M457,124$3.6M369,542+87,582+23.70%Add
Birchview Capital, LP
1.99%2.48%#2$4.4M449,019$4.4M449,01900.00%Unchanged
Rangeley Capital, LLC
3.9%4.24%#1$4.1M417,270$4.4M449,460-32,190-7.16%Reduce
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
<0.01%<0.01%#104$3.5M355,896$3.5M356,665-769-0.22%Reduce
MONIMUS CAPITAL MANAGEMENT, LP
0.75%1.31%#5$3.2M329,052$4.7M485,617-156,565-32.24%Reduce
BNP PARIBAS FINANCIAL MARKETS
<0.01%<0.01%#69$3.1M315,803$4.1M424,596-108,793-25.62%Reduce
AQR CAPITAL MANAGEMENT LLC
<0.01%<0.01%#78$3.0M302,572$2.0M204,016+98,556+48.31%Add
Penbrook Management LLC
1.7%2%#3$2.7M271,720$2.6M271,72000.00%Unchanged
VANGUARD FIDUCIARY TRUST CO
<0.01%<0.01%#97$2.5M259,064$2.5M254,573+4,491+1.76%Add
UBS Group AG
<0.01%<0.01%#115$2.4M241,425$3.2M328,491-87,066-26.50%Reduce
MACKENZIE FINANCIAL CORP
<0.01%#62$2.3M239,899$00+239,899New Buy
Coppell Advisory Solutions LLC
0.19%#9$2.3M12$00+12New Buy
GROUP ONE TRADING LLC
<0.01%<0.01%#57$2.2M226,200$743,73676,516+149,684+195.62%Add
Squarepoint Ops LLC
<0.01%<0.01%#61$2.2M223,971$2.2M230,920-6,949-3.01%Reduce
BANK OF AMERICA CORP /DE/
<0.01%<0.01%#137$2.0M208,246$3.8M393,632-185,386-47.10%Reduce
Focused Wealth Management, Inc
0.18%0.21%#11$2.0M207,445$2.0M207,403+42+0.02%Add
Connor, Clark & Lunn Investment Management Ltd.
<0.01%<0.01%#53$1.9M191,693$1.5M156,551+35,142+22.45%Add
MARSHALL WACE, LLP
<0.01%<0.01%#70$1.9M190,834$433,25744,574+146,260+328.13%Add
SIMPLEX TRADING, LLC
<0.01%<0.01%#79$1.6M161,800$572,53758,903+102,897+174.69%Add
Quantinno Capital Management LP
<0.01%<0.01%#65$1.6M158,331$1.4M144,299+14,032+9.72%Add
JANE STREET GROUP, LLC
<0.01%<0.01%#140$1.5M151,100$2.4M250,426-99,326-39.66%Reduce
MILLENNIUM MANAGEMENT LLC
<0.01%<0.01%#102$1.5M149,900$488,91650,300+99,600+198.01%Add
DIADEMA PARTNERS LP
0.18%#10$1.5M149,482$00+149,482New Buy
Bank of New York Mellon Corp
<0.01%<0.01%#122$1.3M133,906$1.3M136,322-2,416-1.77%Reduce
MASSACHUSETTS FINANCIAL SERVICES CO /MA/
<0.01%<0.01%#107$1.2M126,990$1.3M132,051-5,061-3.83%Reduce
Russell Investments Group, Ltd.
<0.01%<0.01%#82$1.2M121,901$978,093100,627+21,274+21.14%Add

🧭 Institutional Sector Flow Heatmap

Net Outflow Net Inflow