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Upstream Bio, Inc. (UPB)  
$28.08 2.21 (8.54%) as of 4:30 Wed 1/7


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Total Insiders  : 9  
Total Direct Shares :
6,570,224
Total Indirect Shares :
9,109,746
 
% Held by Insiders:
12.4%
 
5 other people own 
 $5,084,754 Wellington Biomedical Inn...
 $25,124,103 Blavatnik Len
 $154,283,033  
 
Filer's Name Relation Direct Date   Direct Shares Indirect Date Indirect Shares
   Sutherland Everett Rand 2026-01-02 75,000 2026-01-02 0
   Ambrose Allison 2026-01-02 17,000 2026-01-02 0
   Houghton Adam 2026-01-02 25,000 2026-01-02 0
   Deykin Aaron 2026-01-02 33,581 2026-01-02 0
   Gray Michael 2026-01-02 30,500 2026-01-02 0
   Blavatnik Len 2024-10-15 5,494,410 2024-10-15 0
   Wellington Biomedical Innovation Master Investors 2024-10-15 894,733 2024-10-15 0
   Orbimed Israel Gp Ii, L.p. Director, 10% Owner 0 2024-10-15 4,554,873
   Chimovits Erez Director, 10% Owner 0 2024-10-15 4,554,873
9 Records found