Prothena Corp Public LTD Co: which funds bought and sold
Institutions that bought and sold Prothena Corp Public shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.
Between March 31, 2026 and June 30, 2026, 83 institutions that filed 13F reports for both quarters added to or opened positions in Prothena Corp Public, and 80 cut or closed them. Together they added a net 367K shares, +0.8% on what they held at the start of the quarter. Active managers and hedge funds on our list were net sellers of 194K shares (−0.8%); index fund managers were net buyers of 987K shares (+9.2%). 27 opened a new position and 23 sold out entirely.
Bought, Q2 2026 83 institutions, 27 of them new holders Sold, Q2 2026 80 institutions, 23 of them sold out
Net change, all compared +367K shares (+0.8%)
Net change, active managers −194K shares (−0.8%), 18 bought, 15 sold
Buyers versus sellers
83 bought 46 80 sold
Active managers and hedge funds 18 bought · 15 sold · −194K
Index fund managers 7 bought · 3 sold · +987K
Other institutions 58 bought · 62 sold · −425K
Biggest buyers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Acadian Asset Management LLC Active manager | +463K +29.9% | 2.0M | $19.7M |
| State Street Corp Index funds | +455K +23.5% | 2.4M | $23.4M |
| Man Group PLC Hedge fund | +297K +77.7% | 678K | $6.6M |
| Mackenzie Financial Corp | +240K New position | 240K | $2.3M |
| Blackrock, Inc. Index funds | +224K +4.8% | 4.9M | $47.7M |
| Vanguard Portfolio Management LLC Index funds | +205K +14.2% | 1.7M | $16.2M |
| Qube Research & Technologies Ltd Hedge fund | +177K +28.7% | 791K | $7.7M |
| Goldman Sachs Group Inc | +161K +19.6% | 980K | $9.6M |
| Diadema Partners LP | +149K New position | 149K | $1.5M |
| Marshall Wace, LLP Hedge fund | +146K +328.1% | 191K | $1.9M |
| Dimensional Fund Advisors LP | +123K +15.7% | 906K | $8.9M |
| AQR Capital Management LLC Hedge fund | +99K +48.3% | 303K | $3M |
| Renaissance Technologies LLC Hedge fund | +90K +14.8% | 698K | $6.8M |
| Northern Trust Corp Index funds | +88K +23.7% | 457K | $4.5M |
| Exoduspoint Capital Management, LP Hedge fund | +71K +634.2% | 82K | $803,005 |
| State Of Wisconsin Investment Board | +70K New position | 70K | $688,492 |
| Mariner, LLC | +62K +11.0% | 625K | $6.1M |
| Two Sigma Investments, LP Hedge fund | +59K +4.9% | 1.3M | $12.4M |
| Trexquant Investment LP Hedge fund | +52K +212.6% | 77K | $751,196 |
| Citigroup Inc | +50K +609.5% | 58K | $566,126 |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Acadian Asset Management LLC Active manager | +463K +29.9% | 2.0M | $19.7M |
| Man Group PLC Hedge fund | +297K +77.7% | 678K | $6.6M |
| Qube Research & Technologies Ltd Hedge fund | +177K +28.7% | 791K | $7.7M |
| Marshall Wace, LLP Hedge fund | +146K +328.1% | 191K | $1.9M |
| AQR Capital Management LLC Hedge fund | +99K +48.3% | 303K | $3M |
| Renaissance Technologies LLC Hedge fund | +90K +14.8% | 698K | $6.8M |
| Exoduspoint Capital Management, LP Hedge fund | +71K +634.2% | 82K | $803,005 |
| Two Sigma Investments, LP Hedge fund | +59K +4.9% | 1.3M | $12.4M |
| Trexquant Investment LP Hedge fund | +52K +212.6% | 77K | $751,196 |
| Engineers Gate Manager LP Hedge fund | +41K New position | 41K | $404,033 |
Biggest sellers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Armistice Capital, LLC Hedge fund | −439K Sold out | 0 | — |
| Point72 Asset Management, L.P. Hedge fund | −400K Sold out | 0 | — |
| FMR LLC Active manager | −352K −4.7% | 7.2M | $70.5M |
| Walleye Capital LLC Hedge fund | −277K Sold out | 0 | — |
| Morgan Stanley | −235K −19.1% | 995K | $9.7M |
| Nuveen, LLC | −202K −26.6% | 557K | $5.5M |
| Bank Of America Corp | −185K −47.1% | 208K | $2M |
| Monimus Capital Management, LP | −157K −32.2% | 329K | $3.2M |
| D. E. Shaw & Co., Inc. Hedge fund | −152K −8.6% | 1.6M | $15.8M |
| BNP Paribas Financial Markets | −109K −25.6% | 316K | $3.1M |
| Jane Street Group, LLC | −108K Sold out | 0 | — |
| Jump Financial, LLC | −105K −88.6% | 14K | $132,616 |
| Y-Intercept (Hong Kong) Ltd | −101K Sold out | 0 | — |
| Citadel Advisors LLC Hedge fund | −97K −22.2% | 339K | $3.3M |
| UBS Group AG | −87K −26.5% | 241K | $2.4M |
| Campbell & Co Investment Adviser LLC | −74K −52.1% | 68K | $669,098 |
| Palo Alto Investors LP | −65K −5.4% | 1.1M | $11.2M |
| Jackson Creek Investment Advisors LLC | −54K Sold out | 0 | — |
| Fox Run Management, L.L.C. | −35K Sold out | 0 | — |
| Gsa Capital Partners LLP | −32K Sold out | 0 | — |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Armistice Capital, LLC Hedge fund | −439K Sold out | 0 | — |
| Point72 Asset Management, L.P. Hedge fund | −400K Sold out | 0 | — |
| FMR LLC Active manager | −352K −4.7% | 7.2M | $70.5M |
| Walleye Capital LLC Hedge fund | −277K Sold out | 0 | — |
| D. E. Shaw & Co., Inc. Hedge fund | −152K −8.6% | 1.6M | $15.8M |
| Citadel Advisors LLC Hedge fund | −97K −22.2% | 339K | $3.3M |
| ADAR1 Capital Management, LLC Hedge fund | −27K −1.7% | 1.6M | $15.2M |
| Los Angeles Capital Management LLC Active manager | −24K −98.6% | 337 | $3,299 |
| Intech Investment Management LLC Active manager | −12K Sold out | 0 | — |
| Squarepoint Ops LLC Hedge fund | −6,949 −3.0% | 224K | $2.2M |
New positions
| Institution | Shares | Value June 30, 2026 |
|---|---|---|
| Mackenzie Financial Corp | 240K | $2.3M |
| Diadema Partners LP | 149K | $1.5M |
| State Of Wisconsin Investment Board | 70K | $688,492 |
| Engineers Gate Manager LPHedge fund | 41K | $404,033 |
| Shelton Capital Management | 39K | $386,431 |
| Persistent Asset Partners Ltd | 38K | $372,999 |
| Aquatic Capital Management LLC | 25K | $248,852 |
| Canada Pension Plan Investment Board | 24K | $234,960 |
| Envestnet Asset Management Inc | 23K | $224,269 |
| Headlands Technologies LLC | 15K | $147,604 |
Sold out
| Institution | Shares | Value March 31, 2026 |
|---|---|---|
| Armistice Capital, LLCHedge fund | 439K | $4.3M |
| Point72 Asset Management, L.P.Hedge fund | 400K | $3.9M |
| Walleye Capital LLCHedge fund | 277K | $2.7M |
| Jane Street Group, LLC | 108K | $1M |
| Y-Intercept (Hong Kong) Ltd | 101K | $979,825 |
| Jackson Creek Investment Advisors LLC | 54K | $526,000 |
| Fox Run Management, L.L.C. | 35K | $324,231 |
| Gsa Capital Partners LLP | 32K | $316,000 |
| Cornerstone Investment Partners, LLC | 31K | $298,278 |
| Susquehanna International Group, LLP | 18K | $172,938 |
Who holds the shares
- Institutions reporting
- 188
- Ten largest holders
- 60.6% of 13F-reported shares
- Index fund managers
- 24.7% of 13F-reported shares
- Active managers and hedge funds
- 52.4% of 13F-reported shares
| Type | Bought | Sold | New | Sold out | Net change in shares | Net % |
|---|---|---|---|---|---|---|
| Active managers and hedge funds | 18 | 15 | 3 | 4 | −194K | −0.8% |
| Index fund managers | 7 | 3 | 0 | 0 | +987K | +9.2% |
| Other institutions | 58 | 62 | 24 | 19 | −425K | −3.8% |
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