Q4 2025 13F Holders as of 31 Dec 2025
-
Type / Class
-
Equity / Common Stock, par value $0.001 per share
-
Shares outstanding
-
54,284,692
-
Total 13F shares
-
51,174,207
-
Share change
-
+6,455,037
-
Total reported value
-
$1,389,324,241
-
Put/Call ratio
-
50%
-
Price per share
-
$27.15
-
Number of holders
-
131
-
Value change
-
+$178,186,919
-
Number of buys
-
83
-
Number of sells
-
40
Institutional Holders of Upstream Bio, Inc. - Common Stock, par value $0.001 per share (UPB) as of Q4 2025
As of 31 Dec 2025,
Upstream Bio, Inc. - Common Stock, par value $0.001 per share (UPB) was held by
131 institutional
shareholders
that filed Form 13F with the SEC.
Together, they reported ownership of
51,174,207 shares.
The largest 10 holders included
FMR LLC, ORBIMED ADVISORS LLC, BlackRock, Inc., Decheng Capital LLC, NORGES BANK, ENAVATE SCIENCES GP, LLC, VANGUARD GROUP INC, UBS Group AG, JANUS HENDERSON GROUP PLC, and Altshuler Shaham Ltd.
This page lists
131
institutional shareholders reporting positions in this security
for the Q4 2025 filing period.
| Investor |
Option |
Weight % |
Change % |
Value $ |
* Price
|
Shares |
Share Change |
Activity |
Report Period |
* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.