Who owns Janux Therapeutics (JANX)
Which tracked institutional funds hold JANX, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See JANX 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
59 tracked funds added or opened JANX while 25 trimmed or exited it between 2026-Q1 and 2026-Q2 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
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
JANX’s largest tracked holder by dollar value, RA CAPITAL MANAGEMENT, L.P., sizes it at 1.5% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 1.5pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in JANX 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 183 tracked filers holding JANX, 116 increased or opened the position and 81 reduced or closed it; over the same quarter, open-market insider Form 4s were net sales.
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 JANX 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 6
- PANAGORA ASSET MANAGEMENT INC$4M
- Jupiter Topco LLC$3M
- AQR CAPITAL MANAGEMENT LLC$2M
- Trexquant Investment LP$973K
- Verdad Advisers, LP$620K
- MARSHALL WACE, LLP$503K
Full exits 15
- JANUS HENDERSON GROUP PLC$58M
- Deep Track Capital, LP$17M
- Logos Global Management LP$14M
- Irenic Capital Management LP$11M
- TANG CAPITAL MANAGEMENT LLC$7M
- HRT FINANCIAL LP$6M
Largest adds
- FEDERATED HERMES, INC.$35M
- BlackRock, Inc.$19M
- TWO SIGMA INVESTMENTS, LP$17M
- RA CAPITAL MANAGEMENT, L.P.$16M
- D. E. Shaw & Co., Inc.$15M
- Point72 Asset Management, L.P.$15M
Largest trims
- BALYASNY ASSET MANAGEMENT L.P.$12M
- ORBIMED ADVISORS LLC$6M
- Woodline Partners LP$5M
- ExodusPoint Capital Management, LP$1M
- Hudson Bay Capital Management LP$1M
- Man Group plc$946K
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 |
|---|---|---|---|---|
| RA CAPITAL MANAGEMENT, L.P. | 11,189,693 | $172M | 18.8% | 2026-Q2 |
| BlackRock, Inc. added | 6,134,667 | $94M | 10.3% | 2026-Q2 |
| Prosight Management, LP added | 3,804,481 | $58M | 6.4% | 2026-Q2 |
| STATE STREET CORP added | 3,004,899 | $46M | 5.1% | 2026-Q2 |
| FMR LLC added | 2,412,825 | $37M | 4.1% | 2026-Q2 |
| FEDERATED HERMES, INC. added | 2,352,927 | $36M | 4.0% | 2026-Q2 |
| Point72 Asset Management, L.P. added | 1,993,837 | $31M | 3.4% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 1,857,351 | $29M | 3.1% | 2026-Q2 |
| TCG Crossover Management, LLC | 1,789,617 | $27M | 3.0% | 2026-Q2 |
| Alyeska Investment Group, L.P. added | 1,647,140 | $25M | 2.8% | 2026-Q2 |
| WELLINGTON MANAGEMENT GROUP LLP added | 1,507,360 | $23M | 2.5% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC added | 1,330,710 | $20M | 2.2% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP added | 1,207,250 | $19M | 2.0% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 1,204,150 | $18M | 2.0% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 1,200,737 | $18M | 2.0% | 2026-Q2 |
| ALGERT GLOBAL LLC added | 1,110,889 | $17M | 1.9% | 2026-Q2 |
| D. E. Shaw & Co., Inc. added | 1,096,509 | $17M | 1.8% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 952,675 | $15M | 1.6% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ added | 910,460 | $14M | 1.5% | 2026-Q2 |
| MORGAN STANLEY added | 836,966 | $13M | 1.4% | 2026-Q2 |
| Nantahala Capital Management, LLC | 809,914 | $12M | 1.4% | 2026-Q2 |
| Qube Research & Technologies Ltd added | 702,057 | $11M | 1.2% | 2026-Q2 |
| Squarepoint Ops LLC trimmed | 532,321 | $8M | 0.9% | 2026-Q2 |
| ORBIMED ADVISORS LLC trimmed | 524,700 | $8M | 0.9% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC added | 504,544 | $8M | 0.8% | 2026-Q2 |
| ADAR1 Capital Management, LLC added | 420,881 | $6M | 0.7% | 2026-Q2 |
| NORTHERN TRUST CORP added | 398,366 | $6M | 0.7% | 2026-Q2 |
| JANE STREET GROUP, LLC added | 391,991 | $6M | 0.7% | 2026-Q2 |
| Nationale-Nederlanden Powszechne Towarzystwo Emerytalne S.A. | 376,496 | $6M | 0.6% | 2026-Q2 |
| Woodline Partners LP trimmed | 370,032 | $6M | 0.6% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 369,191 | $6M | 0.6% | 2026-Q2 |
| Rock Springs Capital Management LP | 367,009 | $6M | 0.6% | 2026-Q2 |
| Jump Financial, LLC added | 361,665 | $6M | 0.6% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 359,725 | $6M | 0.6% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 315,271 | $5M | 0.5% | 2026-Q2 |
| PANAGORA ASSET MANAGEMENT INC new | 269,113 | $4M | 0.5% | 2026-Q2 |
| Man Group plc trimmed | 248,801 | $4M | 0.4% | 2026-Q2 |
| BALYASNY ASSET MANAGEMENT L.P. trimmed | 211,635 | $3M | 0.4% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS added | 209,593 | $3M | 0.4% | 2026-Q2 |
| Y-Intercept (Hong Kong) Ltd added | 196,487 | $3M | 0.3% | 2026-Q2 |
| JPMORGAN CHASE & CO trimmed | 178,535 | $3M | 0.3% | 2026-Q2 |
| Jupiter Topco LLC new | 172,229 | $3M | 0.3% | 2026-Q2 |
| Allspring Global Investments Holdings, LLC trimmed | 166,092 | $2M | 0.3% | 2026-Q2 |
| BML Capital Management, LLC | 154,961 | $2M | 0.3% | 2026-Q2 |
| UBS Group AG trimmed | 150,701 | $2M | 0.3% | 2026-Q2 |
| Bank of New York Mellon Corp added | 135,072 | $2M | 0.2% | 2026-Q2 |
| Connor, Clark & Lunn Investment Management Ltd. added | 133,870 | $2M | 0.2% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC added | 108,077 | $2M | 0.2% | 2026-Q2 |
| FRANKLIN RESOURCES INC added | 105,281 | $2M | 0.2% | 2026-Q2 |
| CAPITAL FUND MANAGEMENT S.A. trimmed | 101,972 | $2M | 0.2% | 2026-Q2 |
| Rangeley Capital, LLC trimmed | 97,978 | $2M | 0.2% | 2026-Q2 |
| Nuveen, LLC | 97,120 | $1M | 0.2% | 2026-Q2 |
| WINTON GROUP Ltd added | 90,300 | $1M | 0.2% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 84,981 | $1M | 0.1% | 2026-Q2 |
| Russell Investments Group, Ltd. added | 81,601 | $1M | 0.1% | 2026-Q2 |
| Swiss National Bank added | 79,300 | $1M | 0.1% | 2026-Q2 |
| XTX Topco Ltd added | 77,233 | $1M | 0.1% | 2026-Q2 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | 76,601 | $1M | 0.1% | 2026-Q2 |
| Quantinno Capital Management LP added | 70,237 | $1M | 0.1% | 2026-Q2 |
| CITIGROUP INC added | 70,235 | $1M | 0.1% | 2026-Q2 |
| CONGRESS ASSET MANAGEMENT CO added | 67,610 | $1M | 0.1% | 2026-Q2 |
| BARCLAYS PLC added | 63,679 | $978K | 0.1% | 2026-Q2 |
| Trexquant Investment LP trimmed | 63,355 | $973K | 0.1% | 2026-Q2 |
| Walleye Capital LLC trimmed | 62,338 | $958K | 0.1% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. added | 60,960 | $847K | 0.1% | 2026-Q2 |
| Raiffeisen Bank International AG added | 60,000 | $920K | 0.1% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC trimmed | 59,019 | $907K | 0.1% | 2026-Q2 |
| Invesco Ltd. added | 58,002 | $891K | 0.1% | 2026-Q2 |
| NANO CAP NEW MILLENNIUM GROWTH FUND L P added | 56,000 | $860K | 0.1% | 2026-Q2 |
| RHUMBLINE ADVISERS added | 55,221 | $848K | 0.1% | 2026-Q2 |
| Rafferty Asset Management, LLC trimmed | 53,608 | $823K | 0.1% | 2026-Q2 |
| Tema ETFs LLC added | 51,522 | $791K | 0.1% | 2026-Q2 |
| Tidal Investments LLC added | 51,522 | $791K | 0.1% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added | 50,932 | $782K | 0.1% | 2026-Q2 |
| LOS ANGELES CAPITAL MANAGEMENT LLC added | 48,774 | $749K | 0.1% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 48,726 | $748K | 0.1% | 2026-Q2 |
| HighVista Strategies LLC trimmed | 48,376 | $743K | 0.1% | 2026-Q2 |
| AXQ CAPITAL, LP added | 47,508 | $730K | 0.1% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC added | 46,476 | $714K | 0.1% | 2026-Q2 |
| Engineers Gate Manager LP trimmed | 45,313 | $696K | 0.1% | 2026-Q2 |
| Creative Planning added | 44,232 | $679K | 0.1% | 2026-Q2 |
| HSBC HOLDINGS PLC trimmed | 44,101 | $686K | 0.1% | 2026-Q2 |
| DEUTSCHE BANK AG\ added | 43,278 | $665K | 0.1% | 2026-Q2 |
| Jain Global LLC added | 41,429 | $636K | 0.1% | 2026-Q2 |
| Verdad Advisers, LP new | 40,386 | $620K | 0.1% | 2026-Q2 |
| Schonfeld Strategic Advisors LLC added | 40,161 | $617K | 0.1% | 2026-Q2 |
| MARSHALL WACE, LLP added | 32,734 | $503K | 0.1% | 2026-Q2 |
| Legal & General Group Plc trimmed | 30,998 | $476K | 0.1% | 2026-Q2 |
| MARTINGALE ASSET MANAGEMENT L P trimmed | 30,977 | $476K | 0.1% | 2026-Q2 |
| Hudson Bay Capital Management LP trimmed | 30,000 | $461K | 0.1% | 2026-Q2 |
| CenterBook Partners LP new | 28,502 | $438K | 0.0% | 2026-Q2 |
| TUDOR INVESTMENT CORP ET AL trimmed | 28,070 | $431K | 0.0% | 2026-Q2 |
| PROFUND ADVISORS LLC trimmed | 26,973 | $414K | 0.0% | 2026-Q2 |
| Entropy Technologies, LP added | 26,795 | $412K | 0.0% | 2026-Q2 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added | 26,137 | $401K | 0.0% | 2026-Q2 |
| MetLife Investment Management, LLC | 26,031 | $400K | 0.0% | 2026-Q2 |
| VANGUARD ASSET MANAGEMENT, Ltd | 24,439 | $375K | 0.0% | 2026-Q2 |
| Virtus Investment Advisers, LLC added | 24,130 | $371K | 0.0% | 2026-Q2 |
| Aigen Investment Management, LP new | 22,841 | $351K | 0.0% | 2026-Q2 |
| Bleakley Financial Group, LLC added | 19,899 | $306K | 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.