Who owns Jade Biosciences (JBIO)
Which tracked institutional funds hold JBIO, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See JBIO company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on JBIO is one-sided between 2026-Q1 and 2026-Q2: 82 added or opened and 8 trimmed or exited — on balance accumulating.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
JBIO’s largest tracked holder by dollar value, FMR LLC, sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in JBIO divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 150 tracked filers holding JBIO, 110 increased or opened the position and 45 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in JBIO between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 26
- Jupiter Topco LLC$139M
- Paradigm Biocapital Advisors LP$63M
- FRANKLIN RESOURCES INC$62M
- ADAGE CAPITAL PARTNERS GP, L.L.C.$42M
- Polar Capital Holdings Plc$41M
- Pictet Asset Management Holding SA$16M
Full exits 6
- JANUS HENDERSON GROUP PLC$44M
- GREAT POINT PARTNERS LLC$14M
- Driehaus Capital Management LLC$9M
- RTW INVESTMENTS, LP$8M
- ORBIMED ADVISORS LLC$3M
- STEMPOINT CAPITAL LP$2M
Largest adds
- FMR LLC$105M
- STATE STREET CORP$43M
- Fairmount Funds Management LLC$37M
- JPMORGAN CHASE & CO$32M
- RA CAPITAL MANAGEMENT, L.P.$30M
- BlackRock, Inc.$30M
Largest trims
- Opaleye Management Inc.$3M
- RENAISSANCE TECHNOLOGIES LLC$262K
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| FMR LLC added | 9,126,877 | $203M | 12.6% | 2026-Q2 |
| Jupiter Topco LLC new | 6,273,262 | $139M | 8.6% | 2026-Q2 |
| Fairmount Funds Management LLC | 4,553,494 | $101M | 6.3% | 2026-Q2 |
| RA CAPITAL MANAGEMENT, L.P. | 3,671,083 | $82M | 5.1% | 2026-Q2 |
| Venrock Adviser, LLC | 3,220,364 | $72M | 4.4% | 2026-Q2 |
| Bellevue Group AG trimmed | 3,057,996 | $68M | 4.2% | 2026-Q2 |
| Paradigm Biocapital Advisors LP new | 2,857,405 | $63M | 3.9% | 2026-Q2 |
| BlackRock, Inc. added | 2,801,451 | $62M | 3.9% | 2026-Q2 |
| FRANKLIN RESOURCES INC new | 2,792,080 | $62M | 3.8% | 2026-Q2 |
| STATE STREET CORP added | 2,335,285 | $52M | 3.2% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 2,244,773 | $50M | 3.1% | 2026-Q2 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. new | 1,910,812 | $42M | 2.6% | 2026-Q2 |
| Polar Capital Holdings Plc new | 1,846,982 | $41M | 2.5% | 2026-Q2 |
| Avidity Partners Management LP added | 1,700,708 | $38M | 2.3% | 2026-Q2 |
| Remedium Capital Partners, LLC | 1,577,750 | $35M | 2.2% | 2026-Q2 |
| Soleus Capital Management, L.P. added | 1,550,690 | $34M | 2.1% | 2026-Q2 |
| JPMORGAN CHASE & CO added | 1,475,079 | $33M | 2.0% | 2026-Q2 |
| BAKER BROS. ADVISORS LP trimmed | 1,230,426 | $27M | 1.7% | 2026-Q2 |
| Logos Global Management LP added | 1,125,000 | $25M | 1.6% | 2026-Q2 |
| Versant Venture Management, LLC trimmed | 991,783 | $22M | 1.4% | 2026-Q2 |
| ACORN CAPITAL ADVISORS, LLC added | 986,760 | $22M | 1.4% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 985,178 | $22M | 1.4% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 929,407 | $21M | 1.3% | 2026-Q2 |
| Foresite Capital Management VI LLC added | 886,667 | $20M | 1.2% | 2026-Q2 |
| BALYASNY ASSET MANAGEMENT L.P. added | 878,726 | $20M | 1.2% | 2026-Q2 |
| Affinity Asset Advisors, LLC added | 840,350 | $19M | 1.2% | 2026-Q2 |
| SAMSARA BIOCAPITAL, LLC trimmed | 736,237 | $16M | 1.0% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 735,224 | $16M | 1.0% | 2026-Q2 |
| Pictet Asset Management Holding SA new | 733,768 | $16M | 1.0% | 2026-Q2 |
| Aberdeen Group plc trimmed | 621,108 | $14M | 0.9% | 2026-Q2 |
| MARSHALL WACE, LLP trimmed | 585,761 | $13M | 0.8% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ added | 486,955 | $11M | 0.7% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC added | 461,528 | $10M | 0.6% | 2026-Q2 |
| Blackstone Inc. trimmed | 435,320 | $10M | 0.6% | 2026-Q2 |
| Ikarian Capital, LLC trimmed | 427,349 | $9M | 0.6% | 2026-Q2 |
| Walleye Capital LLC new | 365,272 | $8M | 0.5% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC added | 314,548 | $7M | 0.4% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 304,867 | $7M | 0.4% | 2026-Q2 |
| NORTHERN TRUST CORP added | 295,081 | $7M | 0.4% | 2026-Q2 |
| Connor, Clark & Lunn Investment Management Ltd. added | 217,157 | $5M | 0.3% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS added | 199,429 | $4M | 0.3% | 2026-Q2 |
| Jump Financial, LLC added | 172,747 | $4M | 0.2% | 2026-Q2 |
| Point72 Asset Management, L.P. trimmed | 167,204 | $4M | 0.2% | 2026-Q2 |
| Russell Investments Group, Ltd. added | 163,084 | $4M | 0.2% | 2026-Q2 |
| Opaleye Management Inc. trimmed | 145,000 | $3M | 0.2% | 2026-Q2 |
| SCHRODER INVESTMENT MANAGEMENT GROUP added | 140,886 | $3M | 0.2% | 2026-Q2 |
| UBS Group AG added | 127,577 | $3M | 0.2% | 2026-Q2 |
| MORGAN STANLEY added | 124,513 | $3M | 0.2% | 2026-Q2 |
| Quantinno Capital Management LP added | 114,716 | $3M | 0.2% | 2026-Q2 |
| BOOTHBAY FUND MANAGEMENT, LLC trimmed | 112,703 | $3M | 0.2% | 2026-Q2 |
| Sofinnova Investments, Inc. | 107,391 | $2M | 0.1% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC trimmed | 107,053 | $2M | 0.1% | 2026-Q2 |
| Woodline Partners LP added | 100,269 | $2M | 0.1% | 2026-Q2 |
| SEVEN GRAND MANAGERS, LLC new | 100,000 | $2M | 0.1% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 99,977 | $2M | 0.1% | 2026-Q2 |
| WELLINGTON MANAGEMENT GROUP LLP trimmed | 90,396 | $2M | 0.1% | 2026-Q2 |
| Atle Fund Management AB new | 88,556 | $2M | 0.1% | 2026-Q2 |
| Bank of New York Mellon Corp trimmed | 85,343 | $2M | 0.1% | 2026-Q2 |
| Swiss National Bank new | 83,300 | $2M | 0.1% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC new | 78,723 | $2M | 0.1% | 2026-Q2 |
| Longaeva Partners L.P. new | 78,501 | $2M | 0.1% | 2026-Q2 |
| Nuveen, LLC added | 76,047 | $2M | 0.1% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 73,591 | $2M | 0.1% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC added | 68,980 | $2M | 0.1% | 2026-Q2 |
| Trexquant Investment LP added | 68,316 | $2M | 0.1% | 2026-Q2 |
| Harvest Investment Services, LLC added | 62,983 | $1M | 0.1% | 2026-Q2 |
| Corient Private Wealth LP added | 61,440 | $1M | 0.1% | 2026-Q2 |
| XTX Topco Ltd trimmed | 59,093 | $1M | 0.1% | 2026-Q2 |
| Verdad Advisers, LP new | 56,384 | $1M | 0.1% | 2026-Q2 |
| Squarepoint Ops LLC added | 54,456 | $1M | 0.1% | 2026-Q2 |
| CITIGROUP INC added | 54,380 | $1M | 0.1% | 2026-Q2 |
| D. E. Shaw & Co., Inc. new | 51,494 | $1M | 0.1% | 2026-Q2 |
| Maven Securities LTD new | 50,000 | $1M | 0.1% | 2026-Q2 |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC new | 48,374 | $1M | 0.1% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. added | 47,330 | $665K | 0.0% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP added | 45,361 | $1M | 0.1% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added | 45,111 | $1M | 0.1% | 2026-Q2 |
| Rafferty Asset Management, LLC new | 42,629 | $947K | 0.1% | 2026-Q2 |
| RHUMBLINE ADVISERS added | 40,908 | $909K | 0.1% | 2026-Q2 |
| VANGUARD ASSET MANAGEMENT, Ltd new | 36,587 | $813K | 0.1% | 2026-Q2 |
| DEUTSCHE BANK AG\ trimmed | 34,682 | $771K | 0.0% | 2026-Q2 |
| Vanguard Global Advisers, LLC added | 34,093 | $758K | 0.0% | 2026-Q2 |
| STATE OF WISCONSIN INVESTMENT BOARD added | 31,613 | $702K | 0.0% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 29,721 | $660K | 0.0% | 2026-Q2 |
| Voleon Capital Management LP new | 27,777 | $617K | 0.0% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 26,546 | $590K | 0.0% | 2026-Q2 |
| Man Group plc new | 26,123 | $580K | 0.0% | 2026-Q2 |
| Legal & General Group Plc added | 23,420 | $520K | 0.0% | 2026-Q2 |
| BARCLAYS PLC trimmed | 22,634 | $503K | 0.0% | 2026-Q2 |
| Engineers Gate Manager LP new | 22,619 | $503K | 0.0% | 2026-Q2 |
| Aquatic Capital Management LLC new | 22,431 | $498K | 0.0% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 21,486 | $477K | 0.0% | 2026-Q2 |
| PROFUND ADVISORS LLC new | 21,412 | $476K | 0.0% | 2026-Q2 |
| Virtus Investment Advisers, LLC added | 21,329 | $474K | 0.0% | 2026-Q2 |
| Ghisallo Capital Management LLC new | 20,000 | $444K | 0.0% | 2026-Q2 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added | 19,943 | $443K | 0.0% | 2026-Q2 |
| MetLife Investment Management, LLC added | 19,739 | $439K | 0.0% | 2026-Q2 |
| Invesco Ltd. trimmed | 18,119 | $403K | 0.0% | 2026-Q2 |
| KLP KAPITALFORVALTNING AS new | 13,800 | $307K | 0.0% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC trimmed | 13,311 | $296K | 0.0% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.