Janney Montgomery Scott LLC Prothena Corp Public LTD CO Transaction History
Janney Montgomery Scott LLC
- $42.2 Billion
 - Q3 2025
 
A detailed history of Janney Montgomery Scott LLC transactions in Prothena Corp Public LTD CO stock. As of the latest transaction made, Janney Montgomery Scott LLC holds 106,898 shares of PRTA stock, worth $1.13 Million. This represents 0.0% of its overall portfolio holdings.
Number of Shares
106,898Holding current value
$1.13 Million% of portfolio
0.0%Shares
	  1 transactions
	
  Others Institutions Holding PRTA
# of Institutions
218Shares Held
34.2MCall Options Held
879KPut Options Held
791K- 
    
      Black Rock Inc. New York, NY3.86MShares$40.7 Million0.0% of portfolio
 - 
    
      Adar1 Capital Management, LLC Austin, TX3.38MShares$35.6 Million3.14% of portfolio
 - 
    
      Armistice Capital, LLC New York, NY2.24MShares$23.6 Million0.24% of portfolio
 - 
    
      Vanguard Group Inc Valley Forge, PA2.18MShares$22.9 Million0.0% of portfolio
 - 
    
      Palo Alto Investors LP Palo Alto, CA1.27MShares$13.4 Million1.75% of portfolio
 
About PROTHENA CORP PUBLIC LTD CO
- Ticker PRTA
 - Exchange NASDAQ
 - Sector Healthcare
 - Industry Biotechnology
 - Shares Outstandng 46,922,800
 - Market Cap $495M
 - Description
 - Prothena Corporation plc, a late-stage clinical company, focuses on discovery and development of novel therapies for life-threatening diseases in the United States. The company is involved in developing Birtamimab, an investigational humanized antibody that is in Phase III clinical trial for the treatment of AL amyloidosis; Prasinezumab, a human...