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Filings
Ownership
Valuation
Ownership — JBIO
Institutional Holdings
Insider Transactions
US Institutional Ownership
100.0%
Institution
Shares
Value
Ownership %
Change
Filing Date
FMR LLC
9.13M
$202.0M
14.36%
+2.04M
2026-06-30
Jupiter Topco LLC
6.27M
$139.0M
9.87%
--
2026-06-30
Fairmount Funds Management LLC
4.55M
$101.0M
7.16%
--
2026-06-30
RA CAPITAL MANAGEMENT, L.P.
3.67M
$81.0M
5.78%
--
2026-06-30
Venrock Adviser, LLC
3.22M
$71.0M
5.07%
--
2026-06-30
Bellevue Group AG
3.06M
$67.0M
4.81%
-443.5K
2026-06-30
Paradigm Biocapital Advisors LP
2.86M
$63.0M
4.50%
--
2026-06-30
BlackRock, Inc.
2.80M
$62.0M
4.41%
+487.5K
2026-06-30
FRANKLIN RESOURCES INC
2.79M
$62.0M
4.39%
--
2026-06-30
STATE STREET CORP
2.34M
$51.0M
3.67%
+1.68M
2026-06-30
VANGUARD CAPITAL MANAGEMENT LLC
2.24M
$49.0M
3.53%
+448.1K
2026-06-30
ADAGE CAPITAL PARTNERS GP, L.L.C.
1.91M
$42.0M
3.01%
--
2026-06-30
Polar Capital Holdings Plc
1.85M
$41.0M
2.91%
--
2026-06-30
Avidity Partners Management LP
1.70M
$37.0M
2.68%
+300.0K
2026-06-30
Remedium Capital Partners, LLC
1.58M
$35.0M
2.48%
--
2026-06-30
Soleus Capital Management, L.P.
1.55M
$34.0M
2.44%
+753.9K
2026-06-30
JPMORGAN CHASE & CO
1.48M
$32.0M
2.32%
+1.45M
2026-06-30
BAKER BROS. ADVISORS LP
1.23M
$27.0M
1.94%
-410.7K
2026-06-30
Logos Global Management LP
1.13M
$24.0M
1.77%
+725.0K
2026-06-30
Versant Venture Management, LLC
991.8K
$22.0M
1.56%
-534.0K
2026-06-30
ACORN CAPITAL ADVISORS, LLC
986.8K
$21.0M
1.55%
+200.0K
2026-06-30
GEODE CAPITAL MANAGEMENT, LLC
985.2K
$21.0M
1.55%
+162.7K
2026-06-30
CITADEL ADVISORS LLC
929.4K
$20.0M
1.46%
+792.2K
2026-06-30
Foresite Capital Management VI LLC
886.7K
$19.0M
1.40%
+566.7K
2026-06-30
Balyasny Asset Management L.P.
878.7K
$19.0M
1.38%
+476.2K
2026-06-30
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