Prothena Corp Public Ltd Co
PRTA- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001559053
In the last 90 days, Prothena Corp Public Ltd Co insiders filed 5 open-market purchases and 2 sales; 187 institutions reported holding it in 13F filings for Q2 2026, worth $462.7M in total; no superinvestor holds it.
13F holders, Q1 2024
Institutional positions in Prothena Corp Public Ltd Co as of Mar 31, 2024. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 169
- −16 vs. Q4 2023
- Shares held
- 53.5M
- −26.4K (0.0%) vs. Q4 2023
- Total value
- $1.33B
- −$619.7M (−31.9%) vs. Q4 2023
- New holders
- 25
- 58 more added
- Sold out
- 41
- 61 more reduced
2 institutions that held it in Q4 2023 haven't filed for Q1 2024 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2023: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting PRTA on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 187 | $462.7M |
| Q1 2026 | 186 | $459.5M |
| Q4 2025 | 182 | $451.6M |
| Q3 2025 | 187 | $415.8M |
| Q2 2025 | 189 | $253.6M |
| Q1 2025 | 161 | $647.2M |
| Q4 2024 | 171 | $741.3M |
| Q3 2024 | 164 | $855.8M |
| Q2 2024 | 160 | $1.05B |
| Q1 2024 | 169 | $1.33B |
| Q4 2023 | 187 | $1.95B |
| Q3 2023 | 187 | $2.56B |
| Q2 2023 | 196 | $3.54B |
| Q1 2023 | 192 | $2.51B |
| Q4 2022 | 201 | $2.98B |
| Q3 2022 | 183 | $2.69B |
| Q2 2022 | 167 | $1.21B |
| Q1 2022 | 174 | $1.61B |
| Q4 2021 | 196 | $2.12B |
| Q3 2021 | 192 | $2.92B |
| Q2 2021 | 156 | $2.08B |
| Q1 2021 | 146 | $1.00B |
Institutions, Q1 2024
Shares, value and share of portfolio for each institution holding Prothena Corp Public Ltd Co; share changes are against Q4 2023.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| STRS Ohio | 10,100 | $250.0K | 0.00% | −600−5.6% | Reduced |
| Aigen Investment Management, LP | 9,901 | $245.2K | 0.05% | +9,901 | New |
| Handelsbanken Fonder AB | 9,400 | $233.0K | 0.00% | −52,000−84.7% | Reduced |
| Atom Investors LP | 9,303 | $230.4K | 0.03% | +9,303 | New |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 9,050 | $224.2K | 0.00% | −513−5.4% | Reduced |
| Teacher Retirement System of Texas | 8,956 | $222.0K | 0.00% | −310−3.3% | Reduced |
| Point72 (DIFC) Ltd | 8,918 | $220.9K | 0.02% | +8,918 | New |
| Two Sigma Advisers, LP | 8,300 | $205.6K | 0.00% | −138,500−94.3% | Reduced |
| Creative Planning | 8,260 | $204.6K | 0.00% | +8,260 | New |
| Simplex Trading, LLC | 7,218 | $178.0K | 0.01% | +7,218 | New |
| Public Employees Retirement Association of Colorado | 6,552 | $162.0K | 0.00% | 00.0% | Unchanged |
| ADAR1 Capital Management, LLC | 5,988 | $148.3K | 0.04% | −114−1.9% | Reduced |
| Royal Bank of Canada | 5,514 | $135.0K | 0.00% | −4,369−44.2% | Reduced |
| Ameritas Investment Partners, Inc. | 4,368 | $108.2K | 0.00% | 00.0% | Unchanged |
| Headlands Technologies LLC | 3,881 | $96.1K | 0.02% | +3,881 | New |
| Cutler Group LP | 3,700 | $91.0K | 0.05% | +3,700 | New |
| Metropolitan Life Insurance Co | 2,317 | $57.4K | 0.00% | −72−3.0% | Reduced |
| Group One Trading, L.P. | 2,296 | $56.9K | 0.00% | −25,160−91.6% | Reduced |
| Virtus ETF Advisers LLC | 2,223 | $55.1K | 0.03% | −150−6.3% | Reduced |
| Allspring Global Investments Holdings, LLC | 2,124 | $52.6K | 0.00% | +177+9.1% | Added |
| Advisor Group Holdings, Inc. | 2,076 | $51.4K | 0.00% | −2,019−49.3% | Reduced |
| KBC Group NV | 1,581 | $39.0K | 0.00% | +651+70.0% | Added |
| The PNC Financial Services Group, Inc. | 1,527 | $37.8K | 0.00% | −17−1.1% | Reduced |
| Amalgamated Bank | 1,440 | $36.0K | 0.00% | −4,610−76.2% | Reduced |
| Pacer Advisors, Inc. | 1,410 | $34.9K | 0.00% | +1,410 | New |
| Quantbot Technologies LP | 1,300 | $32.2K | 0.00% | +1,300 | New |
| Walleye Capital LLC | 1,219 | $30.2K | 0.00% | +1,219 | New |
| Aquatic Capital Management LLC | 1,200 | $29.7K | 0.00% | −5,700−82.6% | Reduced |
| US Bancorp | 1,132 | $28.0K | 0.00% | −29−2.5% | Reduced |
| CWM, LLC | 1,095 | $27.0K | 0.00% | +784+252.1% | Added |
| Quadrant Capital Group LLC | 960 | $23.8K | 0.00% | +941+4,952.6% | Added |
| Nisa Investment Advisors, LLC | 950 | $23.5K | 0.00% | +50+5.6% | Added |
| Byrne Asset Management LLC | 680 | $16.8K | 0.01% | +380+126.7% | Added |
| Riverview Trust Co | 659 | $16.3K | 0.01% | +659 | New |
| Tower Research Capital LLC (TRC) | 584 | $14.5K | 0.00% | −4,435−88.4% | Reduced |
| Clear Street Markets LLC | 500 | $12.0K | 0.01% | −500−50.0% | Reduced |
| Signaturefd, LLC | 474 | $11.7K | 0.00% | +97+25.7% | Added |
| Farther Finance Advisors, LLC | 368 | $9.62K | 0.00% | −16−4.2% | Reduced |
| Asset Dedication, LLC | 184 | $5.00K | 0.00% | 00.0% | Unchanged |
| Daiwa Securities Group Inc. | 195 | $5.00K | 0.00% | 00.0% | Unchanged |
| MeadowBrook Investment Advisors LLC | 200 | $4.95K | 0.00% | 00.0% | Unchanged |
| Huntington National Bank | 198 | $4.90K | 0.00% | +119+150.6% | Added |
| Kelly Financial Services LLC | 182 | $4.51K | 0.00% | 00.0% | Unchanged |
| Sittner & Nelson, LLC | 155 | $3.84K | 0.00% | 00.0% | Unchanged |
| Lindbrook Capital, LLC | 141 | $3.49K | 0.00% | +97+220.5% | Added |
| Russell Investments Group, Ltd. | 130 | $3.22K | 0.00% | −252−66.0% | Reduced |
| Albion Financial Group | 125 | $3.10K | 0.00% | 00.0% | Unchanged |
| Truvestments Capital LLC | 108 | $2.67K | 0.00% | 00.0% | Unchanged |
| Harbor Investment Advisory, LLC | 100 | $2.48K | 0.00% | 00.0% | Unchanged |
| Gould Capital, LLC | 100 | $2.48K | 0.00% | 00.0% | Unchanged |
| Allworth Financial LP | 87 | $2.15K | 0.00% | −40−31.5% | Reduced |
| EverSource Wealth Advisors, LLC | 94 | $1.91K | 0.00% | +1+1.1% | Added |
| GAMMA Investing LLC | 58 | $1.44K | 0.00% | +18+45.0% | Added |
| CIBC Private Wealth Group, LLC | 49 | $1.28K | 0.00% | +49 | New |
| Caldwell Trust Co | 51 | $1.26K | 0.00% | +51 | New |
| POM Investment Strategies, LLC | 24 | $594 | 0.00% | 00.0% | Unchanged |
| CoreCap Advisors, LLC | 23 | $570 | 0.00% | +23 | New |
| GWM Advisors LLC | 17 | $420 | 0.00% | −55−76.4% | Reduced |
| Private Wealth Management Group, LLC | 16 | $397 | 0.00% | −9−36.0% | Reduced |
| Parallel Advisors, LLC | 12 | $297 | 0.00% | +12 | New |
| Lowe Wealth Advisors, LLC | 10 | $248 | 0.00% | 00.0% | Unchanged |
| Nelson, Van Denburg & Campbell Wealth Management Group, LLC | 9 | $222 | 0.00% | +9 | New |
| Rothschild Investment LLC | 5 | $124 | 0.00% | +5 | New |
| Register Financial Advisors LLC | 4 | $99 | 0.00% | +4 | New |
| Whittier Trust Co of Nevada Inc | 3 | $74 | 0.00% | 00.0% | Unchanged |
| First Manhattan Co | 3 | $74 | 0.00% | +3 | New |
| JFS Wealth Advisors, LLC | 2 | $50 | 0.00% | −2−50.0% | Reduced |
| Harbour Investments, Inc. | 1 | $25 | 0.00% | 00.0% | Unchanged |
| Covestor Ltd | 4 | $0 | 0.00% | +1+33.3% | Added |
| Eventide Asset Management, LLC | 0 | $0 | 0.00% | −445,155−100.0% | Sold out |
| Maple Rock Capital Partners Inc. | 0 | $0 | 0.00% | −373,584−100.0% | Sold out |
| PFM Health Sciences, LP | 0 | $0 | 0.00% | −189,744−100.0% | Sold out |
| Amundi | 0 | $0 | 0.00% | −166,631−100.0% | Sold out |
| Squarepoint Ops LLC | 0 | $0 | 0.00% | −74,030−100.0% | Sold out |
| Trexquant Investment LP | 0 | $0 | 0.00% | −67,683−100.0% | Sold out |
| Twinbeech Capital LP | 0 | $0 | 0.00% | −58,096−100.0% | Sold out |
| Edgestream Partners, L.P. | 0 | $0 | 0.00% | −50,522−100.0% | Sold out |
| Sectoral Asset Management Inc | 0 | $0 | 0.00% | −46,777−100.0% | Sold out |
| Caption Management, LLC | 0 | $0 | 0.00% | −45,892−100.0% | Sold out |
| Engineers Gate Manager LP | 0 | $0 | 0.00% | −36,523−100.0% | Sold out |
| Exome Asset Management LLC | 0 | $0 | 0.00% | −36,384−100.0% | Sold out |
| Gsa Capital Partners LLP | 0 | $0 | 0.00% | −34,850−100.0% | Sold out |
| Tudor Investment Corp Et Al | 0 | $0 | 0.00% | −28,561−100.0% | Sold out |
| Dynamic Technology Lab Private Ltd | 0 | $0 | 0.00% | −26,476−100.0% | Sold out |
| Thornburg Investment Management Inc | 0 | $0 | 0.00% | −25,591−100.0% | Sold out |
| Capula Management Ltd | 0 | $0 | 0.00% | −24,310−100.0% | Sold out |
| HAP Trading, LLC | 0 | $0 | 0.00% | −22,701−100.0% | Sold out |
| Susquehanna Portfolio Strategies, LLC | 0 | $0 | 0.00% | −20,158−100.0% | Sold out |
| Hudson Bay Capital Management LP | 0 | $0 | 0.00% | −20,000−100.0% | Sold out |
| AQR Capital Management LLC | 0 | $0 | 0.00% | −13,781−100.0% | Sold out |
| Ameriprise Financial Inc | 0 | $0 | 0.00% | −13,760−100.0% | Sold out |
| Rockefeller Capital Management L.P. | 0 | $0 | 0.00% | −12,614−100.0% | Sold out |
| Entropy Technologies, LP | 0 | $0 | 0.00% | −9,031−100.0% | Sold out |
| Prelude Capital Management, LLC | 0 | $0 | 0.00% | −8,600−100.0% | Sold out |
| HealthInvest Partners AB | 0 | $0 | 0.00% | −8,342−100.0% | Sold out |
| Raymond James & Associates | 0 | $0 | 0.00% | −8,167−100.0% | Sold out |
| XTX Topco Ltd | 0 | $0 | 0.00% | −7,264−100.0% | Sold out |
| Fox Run Management, L.L.C. | 0 | $0 | 0.00% | −6,403−100.0% | Sold out |
| Oppenheimer & Co Inc | 0 | $0 | 0.00% | −6,326−100.0% | Sold out |
| Snowden Capital Advisors LLC | 0 | $0 | 0.00% | −6,000−100.0% | Sold out |