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JBIO · NASDAQ · Biotechnology

Jade Biosciences (JBIO)

Developing antibody therapies for IgA nephropathy and systemic autoimmune diseases.

$21.43

At close+0.41 (+1.95%)

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Breakdown13F · 13D/G · Form 4

Institutions158 holders · as of Jun 30, 2026 · largest filers plus last quarter's tail	≈ 147.56%	72.83M shares
Insiders5 holders · as of Feb 13, 2026	1.27%	624.6K shares
Strategic holders1 holder · as of May 15, 2026	6.29%	3.11M shares
Adds to	155.12%

49.36M company shares as of Sep 3, 2026 · institutions as of Jun 30, 2026 · holders as of their latest filing

Two share counts disagree (49.36M in the company's Sep 3, 2026 report, 60.86M elsewhere); stakes use the report.

This quarter's institutional total failed a plausibility check; shown: the largest filers plus last quarter's remainder.

These groups come from separate filings that can overlap, so they add to 155.12%; nothing is left for Other.

Top shareholders13F · 13D/G · Form 4

Holder	Stake	Shares	Evidence
FMR LLCInstitution	18.49%	9.13M	13Fas of Jun 30, 2026
Jupiter Topco LLCInstitution	12.71%	6.27M	13Fas of Jun 30, 2026
Fairmount Funds Management LLCInstitution	9.23%	4.55M	13Fas of Jun 30, 2026
Ra Capital Management, L.P.Institution	7.44%	3.67M	13Fas of Jun 30, 2026
VR Adviser, LLCInstitution	6.52%	3.22M	13Fas of Jun 30, 2026
Janus Henderson Group PLCStrategic	6.29%	3.11M	13Gfiled May 15, 2026 ↗
Bellevue Group AGInstitution	6.20%	3.06M	13Fas of Jun 30, 2026
Paradigm Biocapital Advisors LPInstitution	5.79%	2.86M	13Fas of Jun 30, 2026
BlackRock, Inc.Institution	5.68%	2.80M	13Fas of Jun 30, 2026
Franklin Resources IncInstitution	5.66%	2.79M	13Fas of Jun 30, 2026
State Street CorpInstitution	4.73%	2.34M	13Fas of Jun 30, 2026
Vanguard Capital Management LLCInstitution	4.55%	2.24M	13Fas of Jun 30, 2026
Adage Capital Partners GP, L.L.C.Institution	3.87%	1.91M	13Fas of Jun 30, 2026
Polar Capital Holdings PLCInstitution	3.74%	1.85M	13Fas of Jun 30, 2026
Avidity Partners Management LPInstitution	3.45%	1.70M	13Fas of Jun 30, 2026
Remedium Capital Partners, LLCInstitution	3.20%	1.58M	13Fas of Jun 30, 2026
Soleus Capital Management, L.P.Institution	3.14%	1.55M	13Fas of Jun 30, 2026
JPMorgan Chase & CoInstitution	2.99%	1.48M	13Fas of Jun 30, 2026
Baker Bros. Advisors LPInstitution	2.49%	1.23M	13Fas of Jun 30, 2026
Logos Global Management LPInstitution	2.28%	1.13M	13Fas of Jun 30, 2026
Versant Venture Management, LLCInstitution	2.01%	991,783	13Fas of Jun 30, 2026
Acorn Capital Advisors, LLCInstitution	2.00%	986,760	13Fas of Jun 30, 2026
Geode Capital Management, LLCInstitution	2.00%	985,178	13Fas of Jun 30, 2026
Citadel Advisors LLCInstitution	1.88%	929,407	13Fas of Jun 30, 2026
Foresite Capital Management Vi LLCInstitution	1.80%	886,667	13Fas of Jun 30, 2026

13F — a manager's quarterly holdings · 13D/13G — an ownership statement filed at 5% or more

Institutions13F, as of Jun 30, 2026

158 holders · 72.83M shares · 54 new positions · 116 increased · 24 reduced · 18 closed

Holder	Shares	% outstanding	Chg q/q	Filed
FMR LLC	9.13M	18.49%	+2.04M	Aug 13, 2026
Jupiter Topco LLC	6.27M	12.71%	+6.27Mnew	Aug 14, 2026
Fairmount Funds Management LLC	4.55M	9.23%	0	Aug 14, 2026
Ra Capital Management, L.P.	3.67M	7.44%	0	Aug 14, 2026
VR Adviser, LLC	3.22M	6.52%	0	Aug 14, 2026
Bellevue Group AG	3.06M	6.20%	−443.5K	Aug 14, 2026
Paradigm Biocapital Advisors LP	2.86M	5.79%	+2.86Mnew	Aug 14, 2026
BlackRock, Inc.	2.80M	5.68%	+487.5K	Aug 7, 2026

Ownership statements13D/G · 5% or more, as filed

Holder	% of class	Shares	Form	Filed
RA Capital Management, L.P.	7.00%	3.21M	13G	Oct 16, 2025 ↗
Deep Track Capital, LP	6.99%	2.28M	13G	Nov 14, 2025 ↗
Bellevue Group AG	6.80%	3.34M	13G	Feb 17, 2026 ↗
Janus Henderson Group PLC	6.30%	3.11M	13G	May 15, 2026 ↗

Jade Biosciences (JBIO)

Breakdown13F · 13D/G · Form 4

Top shareholders13F · 13D/G · Form 4

Institutions13F, as of Jun 30, 2026

Ownership statements13D/G · 5% or more, as filed

Insider tradesForm 4

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