JANX · Janux Therapeutics, Inc. · Holdings
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Institutional Ownership Trend
Holder Concentration
Across 199 13F filersWho Holds JANX
Last 8 quarters through Sep 30, 2026 (filing window open)Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.
Jun 30, 2026, the newest closed quarter: 197 filers, like-for-like change +2.0%; actively managed books -1.4%; index-like books +13.5%.
| Holder type | Share | Filers | Change |
|---|---|---|---|
| Registered adviser | 48.4% | 98 | +2.4% |
| Exempt adviser | 1.8% | 6 | +111.2% |
| Adviser | 4.3% | 4 | +78.2% |
| Bank | 8.2% | 13 | +15.7% |
| Insurer | 0.0% | 1 | new |
| Broker-dealer | 0.0% | 1 | -78.4% |
| Benefit plan | 0.1% | 2 | +24.7% |
| Non-US | 0.5% | 5 | +54.0% |
| Holding company | 19.8% | 7 | +8.8% |
| Unknown | 17.0% | 60 | -22.5% |
| Style | Share | Filers | Change |
|---|---|---|---|
| Index-like | 25.4% | 28 | +13.5% |
| Systematic-like | 17.9% | 35 | +44.9% |
| Concentrated | 25.6% | 17 | -6.2% |
| Diversified active | 31.1% | 117 | -13.6% |
| Not measured | 0.0% | 0 | — |
| Unknown | 0.0% | 0 | — |
| Turnover | Share | Filers | Change |
|---|---|---|---|
| Low turnover | 52.3% | 89 | +6.9% |
| Medium turnover | 15.4% | 44 | +7.3% |
| High turnover | 25.8% | 48 | +18.0% |
| Unknown | 6.4% | 16 | -49.9% |
| Not measured | 0.0% | 0 | — |
| Holding horizon | Share | Filers | Change |
|---|---|---|---|
| Short horizon | 7.5% | 32 | -47.9% |
| Medium horizon | 22.0% | 36 | -11.4% |
| Long horizon | 54.1% | 104 | +22.9% |
| Unknown | 16.4% | 25 | +11.0% |
| Not measured | 0.0% | 0 | — |
| 13F book size | Share | Filers | Change |
|---|---|---|---|
| Under $1B | 7.3% | 35 | +7.0% |
| $1B to $10B | 10.9% | 50 | -31.6% |
| $10B to $100B | 35.4% | 59 | +14.6% |
| $100B or more | 46.4% | 53 | +4.6% |
| Not measured | 0.0% | 0 | — |
| Client base | Share | Filers | Change |
|---|---|---|---|
| Individuals and high net worth | 0.3% | 31 | -41.1% |
| Pooled investment vehicles | 35.5% | 33 | -4.1% |
| Registered funds and BDCs | 9.0% | 13 | +9.2% |
| Pension and profit sharing plans | 0.0% | 1 | +66.0% |
| Insurance companies | 0.0% | 2 | +2.2% |
| Governments and sovereign funds | 2.5% | 5 | +203.9% |
| Other investment advisers | 0.0% | 2 | +33.7% |
| Other | 0.2% | 1 | new |
| Diversified | 0.9% | 10 | +45.4% |
| Corporations | 0.0% | 0 | — |
| Unknown | 51.6% | 99 | +1.6% |
| Private funds | Share | Filers | Change |
|---|---|---|---|
| Hedge funds | 19.1% | 41 | +25.8% |
| Private equity funds | 0.3% | 7 | -76.9% |
| Venture capital funds | 18.4% | 2 | -8.2% |
| Real estate funds | 0.0% | 3 | +466.7% |
| Securitized asset funds | 0.1% | 1 | -32.7% |
| Other private funds | 3.6% | 8 | +31.8% |
| Mixed private funds | 0.2% | 2 | +25.0% |
| Private funds, type not stated | 0.1% | 1 | +12.0% |
| No private funds | 8.5% | 39 | +0.6% |
| Unknown | 49.8% | 93 | -0.3% |
| Location | Share | Filers | Change |
|---|---|---|---|
| United States | 95.6% | 158 | +1.6% |
| Outside the US | 4.4% | 39 | +11.1% |
The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.
How the mix is measured
Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.
Excluded 2 holders with no observed 2026-03-31 13F and 1 holder with no observed 2026-06-30 13F. Compared across CIK changes: JANUS HENDERSON GROUP PLC continues as Jupiter Topco LLC.
Conviction and Crowding
197 13F filers, quarter ended Jun 30, 2026Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.
Managers in the top fifth by current three-year FundScore alpha were net buyers of $0 (0 buying, 0 selling).
Estimated Holder Cost Basis
Quarter ended Jun 30, 2026, on that quarter's share basisEstimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.
Estimated cost covers 52.8% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.
Shared Holders
Companies JANX's active holders also own, quarter ended Jun 30, 2026| # | Company | Shared holders |
|---|---|---|
| 1 | ZLAB Zai Lab Ltd | 5 |
| 2 | KROS Keros Therapeutics, Inc. | 3 |
| 3 | PLRX Pliant Therapeutics, Inc. | 5 |
| 4 | RLYB Rallybio Corp | 3 |
| 5 | FULC Fulcrum Therapeutics, Inc. | 4 |
| 6 | ACET Adicet Bio, Inc. | 3 |
| 7 | PRLD Prelude Therapeutics Inc | 3 |
| 8 | MLYS Mineralys Therapeutics, Inc. | 7 |
| 9 | MNPR Monopar Therapeutics | 4 |
| 10 | LXEO Lexeo Therapeutics, Inc. | 4 |
Shareholder Targets
13F filers that own its peers but not JANX, quarter ended Jun 30, 2026Found through its holder-overlap peers: ZLAB, KROS, PLRX, RLYB, FULC, ACET, PRLD, MLYS, MNPR, LXEO, CRBP, BNTC, ALT, SEPN, ALEC, ADCT, ACRS, SVRA, JATT, KRRO. 405 filers in all.
| # | Filer | In peers | Largest peers |
|---|---|---|---|
| 1 | SAMSARA BIOCAPITAL, LLC Registered adviser, Concentrated | $263,864,361 2 held | MLYS, SEPN |
| 2 | DEERFIELD MANAGEMENT COMPANY, L.P. Registered adviser, Diversified active | $222,468,364 4 held | MLYS, SVRA, MNPR |
| 3 | Catalys Pacific, LLC Exempt adviser, Unknown | $213,245,549 1 held | MLYS |
| 4 | TRV GP V, LLC Unknown, Unknown | $208,160,142 1 held | SEPN |
| 5 | SUVRETTA CAPITAL MANAGEMENT, LLC Registered adviser, Diversified active | $202,399,001 4 held | BNTC, LXEO, FULC |
| 6 | NEA Management Company, LLC Registered adviser, Concentrated | $167,849,215 2 held | SVRA, KRRO |
| 7 | Driehaus Capital Management LLC Registered adviser, Diversified active | $162,541,572 4 held | SEPN, MNPR, KRRO |
| 8 | RTW INVESTMENTS, LP Registered adviser, Diversified active | $161,573,268 2 held | ZLAB, SVRA |
| 9 | Frazier Life Sciences Management, L.P. Registered adviser, Concentrated | $144,538,850 4 held | SVRA, ZLAB, ACRS |
| 10 | TRV GP VI, LLC Unknown, Unknown | $141,048,459 1 held | SEPN |
Fund Ownership of JANX by Fund Type
Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026Index funds and index ETFs hold 13.66% of shares outstanding.
| Fund type | Of shares outstanding | Shares |
|---|---|---|
| Index funds | 2.63% | 1,609,586 |
| Index ETFs | 11.03% | 6,741,435 |
| Active ETFs | 0.32% | 193,151 |
| Active funds | 7.45% | 4,556,616 |
| Unclassified | 0.76% | 462,358 |
| All registered funds | 22.18% | 13,563,146 |
How fund types are measured
Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Large RA CAPITAL MANAGEMENT, L.P. Registered adviser | $171,873,684 | 18.30% | 11,189,693 | Shares | 2026-08-14 | |
| Mega BlackRock, Inc. Holding company | $94,228,477 | 10.03% | 6,134,667 | Shares | 2026-08-07 | |
| Small Prosight Management, LP | $58,436,828 | 6.22% | 3,804,481 | Shares | 2026-08-14 | |
| Mega STATE STREET CORP Bank | $46,155,248 | 4.91% | 3,004,899 | Shares | 2026-09-22 | |
| Mega FMR LLC Holding company | $37,060,989 | 3.95% | 2,412,825 | Shares | 2026-08-13 | |
| Large FEDERATED HERMES, INC. Adviser | $36,140,958 | 3.85% | 2,352,927 | Shares | 2026-08-12 | |
| Large Point72 Asset Management, L.P. Registered adviser | $30,625,336 | 3.26% | 1,993,837 | Shares | 2026-08-14 | |
| Mega VANGUARD CAPITAL MANAGEMENT LLC Registered adviser | $28,528,911 | 3.04% | 1,857,351 | Shares | 2026-08-13 | |
| Mid TCG Crossover Management, LLC | $27,488,517 | 2.93% | 1,789,617 | Shares | 2026-08-14 | |
| Large Alyeska Investment Group, L.P. Registered adviser | $25,300,070 | 2.69% | 1,647,140 | Shares | 2026-08-14 | |
| Mega WELLINGTON MANAGEMENT GROUP LLP Holding company | $23,153,048 | 2.47% | 1,507,360 | Shares | 2026-08-14 | |
| Mega VANGUARD PORTFOLIO MANAGEMENT LLC Registered adviser | $20,439,705 | 2.18% | 1,330,710 | Shares | 2026-08-13 | |
| Mega TWO SIGMA INVESTMENTS, LP Registered adviser | $18,543,360 | 1.97% | 1,207,250 | Shares | 2026-08-14 | |
| Mega GEODE CAPITAL MANAGEMENT, LLC Registered adviser | $18,495,744 | 1.97% | 1,204,150 | Shares | 2026-08-12 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $18,443,319 | 1.96% | 1,200,737 | Shares | 2026-09-02 | |
| Mid ALGERT GLOBAL LLC Registered adviser | $17,063,255 | 1.82% | 1,110,889 | Shares | 2026-08-13 | |
| Mega D. E. Shaw & Co., Inc. | $16,842,378 | 1.79% | 1,096,509 | Shares | 2026-08-14 | |
| Mega GOLDMAN SACHS GROUP INC Holding company | $14,633,087 | 1.56% | 952,675 | Shares | 2026-08-14 | |
| Mega BANK OF AMERICA CORP /DE/ Bank | $13,984,663 | 1.49% | 910,460 | Shares | 2026-08-14 | |
| Mega MORGAN STANLEY Holding company | $12,855,793 | 1.37% | 836,966 | Shares | 2026-08-13 | |
| Mid Nantahala Capital Management, LLC Registered adviser | $12,440,279 | 1.32% | 809,914 | Shares | 2026-08-19 | |
| Mega Qube Research & Technologies Ltd Exempt adviser | $10,783,595 | 1.15% | 702,057 | Shares | 2026-08-14 | |
| Large Squarepoint Ops LLC Registered adviser | $8,176,450 | 0.87% | 532,321 | Shares | 2026-08-14 | |
| Mid ORBIMED ADVISORS LLC Registered adviser | $8,059,392 | 0.86% | 524,700 | Shares | 2026-08-14 | |
| Mega MILLENNIUM MANAGEMENT LLC Registered adviser | $7,749,795 | 0.83% | 504,544 | Shares | 2026-08-14 | |
| Large HRT FINANCIAL LP | $7,541,775 | 0.80% | 491,001 | Shares | 2026-08-14 | |
| Mid ADAR1 Capital Management, LLC Registered adviser | $6,464,732 | 0.69% | 420,881 | Shares | 2026-08-14 | |
| Mega NORTHERN TRUST CORP Bank | $6,118,899 | 0.65% | 398,366 | Shares | 2026-08-13 | |
| Mega JANE STREET GROUP, LLC | $6,020,981 | 0.64% | 391,991 | Shares | 2026-08-14 | |
| Mid Nationale-Nederlanden Powszechne Towarzystwo Emerytalne S.A. | $5,782,978 | 0.62% | 376,496 | Shares | 2026-08-07 | |
| Large Woodline Partners LP Registered adviser | $5,683,691 | 0.61% | 370,032 | Shares | 2026-08-14 | |
| Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC Registered adviser | $5,670,773 | 0.60% | 369,191 | Shares | 2026-08-14 | |
| Mid Rock Springs Capital Management LP Registered adviser | $5,637,258 | 0.60% | 367,009 | Shares | 2026-08-14 | |
| Mid Jump Financial, LLC | $5,555,174 | 0.59% | 361,665 | Shares | 2026-08-13 | |
| Mega DIMENSIONAL FUND ADVISORS LP Registered adviser | $5,525,375 | 0.59% | 359,725 | Shares | 2026-08-11 | |
| Mega VANGUARD FIDUCIARY TRUST CO | $4,842,562 | 0.52% | 315,271 | Shares | 2026-08-13 | |
| Large PANAGORA ASSET MANAGEMENT INC Registered adviser | $4,133,575 | 0.44% | 269,113 | Shares | 2026-08-06 | |
| Large Man Group plc | $3,821,583 | 0.41% | 248,801 | Shares | 2026-08-14 | |
| Large Balyasny Asset Management L.P. Registered adviser | $3,250,713 | 0.35% | 211,635 | Shares | 2026-08-14 | |
| Mega BNP PARIBAS ARBITRAGE, SA Non-US | $3,219,348 | 0.34% | 209,593 | Shares | 2026-08-13 | |
| Mega JPMORGAN CHASE & CO Bank | $2,742,296 | 0.29% | 178,535 | Shares | 2026-08-12 | |
| Mega Jupiter Topco LLC | $2,645,437 | 0.28% | 172,229 | Shares | 2026-08-14 | |
| Large Allspring Global Investments Holdings, LLC Holding company | $2,551,172 | 0.27% | 166,092 | Shares | 2026-08-13 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $2,403,840 | 0.26% | 156,500 | Put | 2026-08-14 | |
| Small BML Capital Management, LLC Exempt adviser | $2,380,200 | 0.25% | 154,961 | Shares | 2026-08-07 | |
| Mega UBS Group AG Bank | $2,314,766 | 0.25% | 150,701 | Shares | 2026-08-13 | |
| Mega Bank of New York Mellon Corp Bank | $2,074,704 | 0.22% | 135,072 | Shares | 2026-08-06 | |
| Large Connor, Clark & Lunn Investment Management Ltd. Registered adviser | $2,056,243 | 0.22% | 133,870 | Shares | 2026-08-13 | |
| Large Thrivent Financial for Lutherans Registered adviser | $1,766,860 | 0.19% | 115,030 | Shares | 2026-08-14 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $1,744,896 | 0.19% | 113,600 | Call | 2026-08-14 | |
| Mega AQR CAPITAL MANAGEMENT LLC Registered adviser | $1,660,060 | 0.18% | 108,077 | Shares | 2026-08-14 | |
| Mega FRANKLIN RESOURCES INC Adviser | $1,617,115 | 0.17% | 105,281 | Shares | 2026-08-13 | |
| Large CAPITAL FUND MANAGEMENT S.A. | $1,566,289 | 0.17% | 101,972 | Shares | 2026-08-13 | |
| Small Rangeley Capital, LLC Registered adviser | $1,504,942 | 0.16% | 97,978 | Shares | 2026-08-14 | |
| Mega Nuveen, LLC | $1,491,762 | 0.16% | 97,120 | Shares | 2026-08-11 | |
| Large CONGRESS ASSET MANAGEMENT CO Registered adviser | $1,455,166 | 0.15% | 84,211 | Shares | 2026-10-06 | |
| Mid Y-Intercept (Hong Kong) Ltd Exempt adviser | $1,387,964 | 0.15% | 80,322 | Shares | 2026-10-16 | |
| Mid WINTON GROUP Ltd | $1,387,008 | 0.15% | 90,300 | Shares | 2026-08-07 | |
| Mega PRICE T ROWE ASSOCIATES INC /MD/ Registered adviser | $1,305,308 | 0.14% | 84,981 | Shares | 2026-08-14 | |
| Mega Russell Investments Group, Ltd. | $1,253,390 | 0.13% | 81,601 | Shares | 2026-08-06 | |
| Mega Swiss National Bank | $1,218,048 | 0.13% | 79,300 | Shares | 2026-08-11 | |
| Mid XTX Topco Ltd | $1,186,298 | 0.13% | 77,233 | Shares | 2026-08-14 | |
| Large NOMURA ASSET MANAGEMENT INTERNATIONAL INC. Adviser | $1,176,591 | 0.13% | 76,601 | Shares | 2026-08-14 | |
| Mega JANE STREET GROUP, LLC | $1,165,824 | 0.12% | 75,900 | Call | 2026-08-14 | |
| Large Quantinno Capital Management LP Registered adviser | $1,078,840 | 0.11% | 70,237 | Shares | 2026-08-13 | |
| Mega CITIGROUP INC Bank | $1,078,809 | 0.11% | 70,235 | Shares | 2026-08-03 | |
| Mega BARCLAYS PLC Bank | $978,108 | 0.10% | 63,679 | Shares | 2026-08-14 | |
| Large Trexquant Investment LP Registered adviser | $973,132 | 0.10% | 63,355 | Shares | 2026-08-14 | |
| Large Walleye Capital LLC Registered adviser | $957,511 | 0.10% | 62,338 | Shares | 2026-08-03 | |
| Mid Tema ETFs LLC Registered adviser | $951,315 | 0.10% | 55,053 | Shares | 2026-10-16 | |
| Mega ALLIANCEBERNSTEIN L.P. Registered adviser | $936,345 | 0.10% | 60,960 | Shares | 2026-08-14 | |
| Mid Raiffeisen Bank International AG | $921,600 | 0.10% | 60,000 | Shares | 2026-08-03 | |
| Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC Registered adviser | $906,531 | 0.10% | 59,019 | Shares | 2026-08-13 | |
| Mega Invesco Ltd. Adviser | $890,909 | 0.09% | 58,002 | Shares | 2026-08-14 | |
| Small NANO CAP NEW MILLENNIUM GROWTH FUND L P | $860,160 | 0.09% | 56,000 | Shares | 2026-08-14 | |
| Mega RHUMBLINE ADVISERS Registered adviser | $848,194 | 0.09% | 55,221 | Shares | 2026-08-12 | |
| Large Rafferty Asset Management, LLC Registered adviser | $823,418 | 0.09% | 53,608 | Shares | 2026-08-14 | |
| Large Tidal Investments LLC Registered adviser | $791,377 | 0.08% | 51,522 | Shares | 2026-08-13 | |
| Mega CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Benefit plan | $782,315 | 0.08% | 50,932 | Shares | 2026-08-24 | |
| Large LOS ANGELES CAPITAL MANAGEMENT LLC Registered adviser | $749,168 | 0.08% | 48,774 | Shares | 2026-08-13 | |
| Mega WELLS FARGO & COMPANY/MN Bank | $748,430 | 0.08% | 48,726 | Shares | 2026-08-14 | |
| Small HighVista Strategies LLC Registered adviser | $743,055 | 0.08% | 48,376 | Shares | 2026-08-14 | |
| Mid GSA CAPITAL PARTNERS LLP Registered adviser | $739,415 | 0.08% | 48,139 | Shares | 2026-08-06 | |
| Small AXQ CAPITAL, LP Registered adviser | $729,722 | 0.08% | 47,508 | Shares | 2026-08-06 | |
| Mega AMERICAN CENTURY COMPANIES INC | $713,871 | 0.08% | 46,476 | Shares | 2026-08-12 | |
| Mid Engineers Gate Manager LP | $696,007 | 0.07% | 45,313 | Shares | 2026-08-14 | |
| Mega Creative Planning Registered adviser | $679,402 | 0.07% | 44,232 | Shares | 2026-08-13 | |
| Mega HSBC HOLDINGS PLC | $677,391 | 0.07% | 44,101 | Shares | 2026-08-14 | |
| Mega DEUTSCHE BANK AG\ Non-US | $664,750 | 0.07% | 43,278 | Shares | 2026-08-07 | |
| Large Jain Global LLC Registered adviser | $636,349 | 0.07% | 41,429 | Shares | 2026-08-14 | |
| Small Verdad Advisers, LP | $620,328 | 0.07% | 40,386 | Shares | 2026-08-14 | |
| Large Schonfeld Strategic Advisors LLC Registered adviser | $616,872 | 0.07% | 40,161 | Shares | 2026-08-14 | |
| Large TEACHERS RETIREMENT SYSTEM OF THE STATE OF KENTUCKY | $597,120 | 0.06% | 38,875 | Shares | 2026-08-12 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $589,824 | 0.06% | 38,400 | Call | 2026-09-02 | |
| Small Jackson Creek Investment Advisors LLC Registered adviser | $533,283 | 0.06% | 34,719 | Shares | 2026-08-10 | |
| Large MARSHALL WACE, LLP Exempt adviser | $502,794 | 0.05% | 32,734 | Shares | 2026-08-13 | |
| Mega Legal & General Group Plc | $476,128 | 0.05% | 30,998 | Shares | 2026-08-14 | |
| Mid MARTINGALE ASSET MANAGEMENT L P Registered adviser | $475,806 | 0.05% | 30,977 | Shares | 2026-08-13 | |
| Large Hudson Bay Capital Management LP Registered adviser | $460,800 | 0.05% | 30,000 | Shares | 2026-08-14 | |
| Large Walleye Capital LLC Registered adviser | $459,264 | 0.05% | 29,900 | Call | 2026-08-03 |
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