Latest Institutional Purchases of Prothena Corp Public LTD CO (PRTA)
This list provides information on the latest institutional transactions involving Prothena Corp Public LTD CO (PRTA) stock that were buys. The list includes the name of the institution, the number of shares exchanged, the range of values for the transaction, and the number of shares held by the institution after the purchase has occurred.
| Report Date | Institution (Fund) | Operation | Option | Shares change | Value Range | Shares Held | Trade History |
|---|---|---|---|---|---|---|---|
|
Aug 14, 2025
Q2 2025
|
Adar1 Capital Management, LLC
Austin, TX |
BUY
|
- |
3.38MNew |
$15.5M - $41M
|
3.38M
$25.4M
|
|
|
Aug 14, 2025
Q2 2025
|
Ken Griffin
Citadel Advisors LLC | Chicago, Il
|
BUY
|
- |
1.06M+ 1183.71% |
$4.85M - $12.8M
|
1.15M
$8.65M
|
|
|
Aug 07, 2025
Q2 2025
|
Acadian Asset Management LLC
Boston, MA |
BUY
|
- |
1.02MNew |
$4.66M - $12.4M
|
1.02M
$7.68M
|
|
|
Aug 11, 2025
Q2 2025
|
Vanguard Group Inc
Valley Forge, PA |
BUY
|
- |
907K+ 71.45% |
$4.15M - $11M
|
2.18M
$16.4M
|
|
|
Aug 14, 2025
Q2 2025
|
Rangeley Capital, LLC
New Canaan, CT |
BUY
|
- |
715KNew |
$3.28M - $8.68M
|
715K
$5.39M
|
|
|
Aug 14, 2025
Q2 2025
|
Jacobs Levy Equity Management, Inc
Florham Park, NJ |
BUY
|
- |
675K+ 3636.08% |
$3.09M - $8.19M
|
693K
$5.23M
|
|
|
Aug 13, 2025
Q2 2025
|
Federated Hermes, Inc.
Pittsburgh, PA |
BUY
|
- |
635K+ 116.22% |
$2.91M - $7.71M
|
1.18M
$8.91M
|
|
|
Aug 14, 2025
Q2 2025
|
Balyasny Asset Management LLC
Chicago, IL |
BUY
|
- |
576KNew |
$2.64M - $6.99M
|
576K
$4.34M
|
|
|
Aug 12, 2025
Q2 2025
|
Trexquant Investment LP
Stamford, CT |
BUY
|
- |
553KNew |
$2.53M - $6.71M
|
553K
$4.17M
|
|
|
Aug 14, 2025
Q2 2025
|
Cubist Systematic Strategies, LLC
Stamford, CT |
BUY
|
- |
502KNew |
$2.3M - $6.09M
|
502K
$3.78M
|
|
|
Aug 14, 2025
Q2 2025
|
Granahan Investment Management, LLC
Waltham, MA |
BUY
|
- |
461KNew |
$2.11M - $5.6M
|
461K
$3.48M
|
|
|
Aug 14, 2025
Q2 2025
|
Susquehanna International Group, LLP
Bala Cynwyd, PA |
BUY
|
PUT |
452K+ 1650.0% |
$2.07M - $5.49M
|
480K
$3.62M
|
|
|
Aug 14, 2025
Q2 2025
|
Qube Research & Technologies LTD
London, X0 |
BUY
|
- |
415KNew |
$1.9M - $5.04M
|
415K
$3.13M
|
|
|
Aug 14, 2025
Q2 2025
|
D. E. Shaw & Co., Inc.
New York, NY |
BUY
|
- |
374K+ 2099.04% |
$1.71M - $4.54M
|
391K
$2.95M
|
|
|
Aug 14, 2025
Q2 2025
|
Schonfeld Strategic Advisors LLC
New York, NY |
BUY
|
- |
307KNew |
$1.41M - $3.73M
|
307K
$2.32M
|
|
|
Aug 15, 2025
Q2 2025
|
Morgan Stanley
New York, NY |
BUY
|
- |
233K+ 32.4% |
$1.07M - $2.83M
|
953K
$7.19M
|
|
|
Jul 22, 2025
Q2 2025
|
Gsa Capital Partners LLP
London, X0 |
BUY
|
- |
211KNew |
$964K - $2.56M
|
211K
$1.59M
|
|
|
Aug 14, 2025
Q2 2025
|
Squarepoint Ops LLC
New York, NY |
BUY
|
- |
209KNew |
$958K - $2.54M
|
209K
$1.58M
|
|
|
Aug 14, 2025
Q2 2025
|
Monimus Capital Management, LP
Woodbridge, NJ |
BUY
|
- |
206KNew |
$946K - $2.51M
|
206K
$1.56M
|
|
|
Aug 14, 2025
Q2 2025
|
Two Sigma Investments, LP
New York, NY |
BUY
|
- |
185K+ 1156.47% |
$849K - $2.25M
|
201K
$1.52M
|
|
|
Aug 14, 2025
Q2 2025
|
Ameriprise Financial Inc
Minneapolis, MN |
BUY
|
- |
152KNew |
$694K - $1.84M
|
152K
$1.14M
|
|
|
Aug 14, 2025
Q2 2025
|
Jane Street Group, LLC
New York, NY |
BUY
|
PUT |
143KNew |
$655K - $1.74M
|
143K
$1.08M
|
|
|
Aug 14, 2025
Q2 2025
|
David A. Siegel
Two Sigma Advisers, LP | New York, Ny
|
BUY
|
- |
140KNew |
$640K - $1.7M
|
140K
$1.05M
|
|
|
Aug 14, 2025
Q2 2025
|
Israel Englander
Millennium Management LLC | New York, Ny
|
BUY
|
- |
118K+ 225.12% |
$541K - $1.43M
|
171K
$1.29M
|
|
|
Aug 14, 2025
Q2 2025
|
Birchview Capital, LP
Burlington, VT |
BUY
|
- |
118K+ 35.45% |
$541K - $1.43M
|
451K
$3.4M
|
|
|
Aug 14, 2025
Q2 2025
|
State Of Wisconsin Investment Board
Madison, WI |
BUY
|
- |
104KNew |
$476K - $1.26M
|
104K
$784K
|
|
|
Aug 14, 2025
Q2 2025
|
Royal Bank Of Canada
Toronto, A6 |
BUY
|
- |
102K+ 2353.43% |
$465K - $1.23M
|
106K
$799K
|
|
|
Aug 14, 2025
Q2 2025
|
Diadema Partners LP
Morristown, NJ |
BUY
|
CALL |
100KNew |
$458K - $1.21M
|
100K
$754K
|
|
|
Aug 14, 2025
Q2 2025
|
Caption Management, LLC
Oklahoma City, OK |
BUY
|
PUT |
100KNew |
$458K - $1.21M
|
100K
$754K
|
|
|
Aug 12, 2025
Q2 2025
|
Dimensional Fund Advisors LP
Austin, TX |
BUY
|
- |
99.2K+ 11.49% |
$454K - $1.2M
|
962K
$7.26M
|
|
|
Aug 13, 2025
Q2 2025
|
Russell Investments Group, Ltd.
|
BUY
|
- |
95K+ 7956.62% |
$435K - $1.15M
|
96.2K
$725K
|
|
|
Jul 22, 2025
Q2 2025
|
Duncan Williams Asset Management, LLC
Memphis, TN |
BUY
|
- |
88.3KNew |
$405K - $1.07M
|
88.3K
$666K
|
|
|
Aug 14, 2025
Q2 2025
|
Bank Of America Corp
Charlotte, NC |
BUY
|
- |
79K+ 59.82% |
$362K - $959K
|
211K
$1.59M
|
|
|
Aug 14, 2025
Q2 2025
|
Susquehanna Portfolio Strategies, LLC
Bala Cynwyd, PA |
BUY
|
- |
71.7KNew |
$328K - $870K
|
71.7K
$540K
|
|
|
Aug 07, 2025
Q2 2025
|
Monaco Asset Management Sam
|
BUY
|
- |
70KNew |
$321K - $850K
|
70K
$528K
|
|
|
Aug 14, 2025
Q2 2025
|
Caption Management, LLC
Oklahoma City, OK |
BUY
|
- |
65.1KNew |
$298K - $790K
|
65.1K
$491K
|
|
|
Aug 14, 2025
Q2 2025
|
Quantinno Capital Management LP
New York, NY |
BUY
|
- |
59.6KNew |
$273K - $724K
|
59.6K
$450K
|
|
|
Aug 13, 2025
Q2 2025
|
Norges Bank
Oslo, Q8 |
BUY
|
- |
57.5KNew |
$263K - $697K
|
57.5K
$433K
|
|
|
Aug 08, 2025
Q2 2025
|
Quinn Opportunity Partners LLC
Charlottesville, VA |
BUY
|
- |
50KNew |
$229K - $607K
|
50K
$377K
|
|
|
Aug 13, 2025
Q2 2025
|
Algert Global LLC
San Francisco, CA |
BUY
|
- |
48.2KNew |
$221K - $585K
|
48.2K
$363K
|
|
|
Aug 05, 2025
Q2 2025
|
Simplex Trading, LLC
|
BUY
|
- |
43.3KNew |
$198K - $525K
|
43.3K
$326K
|
|
|
Aug 11, 2025
Q2 2025
|
Covestor LTD
Boston, MA |
BUY
|
- |
42.3K+ 1057275.0% |
$194K - $513K
|
42.3K
$319K
|
|
|
Jul 15, 2025
Q2 2025
|
Public Employees Retirement System Of Ohio
Columbus, OH |
BUY
|
- |
42.2KNew |
$193K - $512K
|
42.2K
$318K
|
|
|
Aug 14, 2025
Q2 2025
|
Engineers Gate Manager LP
New York, NY |
BUY
|
- |
41KNew |
$188K - $497K
|
41K
$309K
|
|
|
Aug 14, 2025
Q2 2025
|
Alliancebernstein L.P.
New York, NY |
BUY
|
- |
40.8K+ 87.34% |
$187K - $496K
|
87.6K
$660K
|
|
|
Aug 14, 2025
Q2 2025
|
Armistice Capital, LLC
New York, NY |
BUY
|
- |
40K+ 1.82% |
$183K - $486K
|
2.24M
$16.9M
|
|
|
Aug 08, 2025
Q2 2025
|
Creative Planning
Overland Park, KS |
BUY
|
- |
39.9K+ 373.05% |
$183K - $484K
|
50.6K
$381K
|
|
|
Aug 14, 2025
Q2 2025
|
Ken Griffin
Citadel Advisors LLC | Chicago, Il
|
BUY
|
PUT |
39.2K+ 161.32% |
$180K - $476K
|
63.5K
$479K
|
|
|
Aug 12, 2025
Q2 2025
|
Franklin Resources Inc
San Mateo, CA |
BUY
|
- |
36.3K+ 183.98% |
$166K - $441K
|
56.1K
$423K
|
|
|
Aug 14, 2025
Q2 2025
|
Graham Capital Management, L.P.
Rowayton, CT |
BUY
|
- |
34KNew |
$156K - $413K
|
34K
$257K
|