YMAB
  
  
      
        Y-mAbs Therapeutics
      
      
        
          YMAB
        
        
      
    
  
          YMAB
        
        
      Delisted
    YMAB was delisted on the 15th of September, 2025.
117 hedge funds and large institutions have $804M invested in Y-mAbs Therapeutics in 2021 Q1 according to their latest regulatory filings, with 18 funds opening new positions, 55 increasing their positions, 32 reducing their positions, and 14 closing their positions.
New
  Increased
  Maintained
  Reduced
  Closed
  more repeat investments, than reductions
Existing positions increased: | Existing positions reduced:
more first-time investments, than exits
New positions opened: | Existing positions closed:
more ownership
Funds ownership: →
more funds holding
Funds holding: →
28% less capital invested
Capital invested by funds: $1.11B → $804M (-$308M)
50% less funds holding in top 10
Funds holding in top 10: 4 → 2 (-2)
100% less call options, than puts
Call options by funds: $0 | Put options by funds: $496K
    
      Holders
    
  
  
    
      
        
      
        117
      
    
      
    
  
    
      Holding in Top 10
    
  
  
    
      
        
      
        2
      
    
      
    
  
    
      Calls
    
  
  
    
      
        
      
        –
      
    
      
    
  
    
      Puts
    
  
  
    
      
        
      
        $496K
      
    
      
    
  
Top Buyers
| 1 | +$23.2M | |
| 2 | +$17.6M | |
| 3 | +$16.4M | |
| 4 | 
          
   
    FLAM
   
  
      First Light Asset Management
     
    
      
        Edina,
      
      
        Minnesota
      
     
   | 
        +$9.33M | 
| 5 | 
          
   
    ACM
   
  
      Ashford Capital Management
     
    
      
        Wilmington,
      
      
        Delaware
      
     
   | 
        +$8.73M | 
Top Sellers
| 1 | -$15.1M | |
| 2 | -$13.1M | |
| 3 | -$6.49M | |
| 4 | 
          
   
    PI
   
  
      Putnam Investments
     
    
      
        Boston,
      
      
        Massachusetts
      
     
   | 
        -$5.7M | 
| 5 | 
          
   
      Axa
     
    
      
        Paris,
      
      
        France
      
     
   | 
        -$4.68M |