JANUX THERAPEUTICS INC (JANX) Institutional Shareholders
JANUX THERAPEUTICS INC (JANX) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $986.64M in JANX holdings during the latest filing period.
Ra Capital Management, L.P. is currently the largest disclosed institutional shareholder of JANX tracked by InsiderSet, reporting ownership valued at approximately $171.87M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $185.64M, representing an estimated gain of +8.01% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 60% of the total disclosed JANX value among the investors covered in this analysis. Major shareholders include Ra Capital Management, L.P., Blackrock, Inc., Prosight Management, Lp, and several other long-term asset managers with concentrated positions in JANUX THERAPEUTICS INC (JANX).
This page ranks the largest institutional JANX shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
184
Total Reported Value
$986.64M
Largest Holder
Ra Capital Management, L.P.
Largest Position
$171.87M
Insider Transactions (90d)
2
Latest Filing Quarter
Q2 2026
New Institutional Positions
72
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Ra Capital Management, L.P. | 1.49% | 11,189,693 | $171,873,684 | $185,637,007 | +$13,763,323 | +8.01% | |
| Blackrock, Inc. | 0.00% | 6,134,667 | $94,228,481 | $101,774,126 | +$7,545,645 | +8.01% | |
| Prosight Management, Lp | 10.07% | 3,804,481 | $58,436,828 | $63,116,340 | +$4,679,512 | +8.01% | |
| Janus Henderson Group Plc | 0.03% | 4,196,409 | $58,279,971 | $69,618,425 | +$11,338,454 | +19.46% | |
| State Street Corp | 0.00% | 3,004,899 | $46,155,249 | $49,851,274 | +$3,696,025 | +8.01% | |
| Fmr Llc | 0.00% | 2,412,825 | $37,060,986 | $40,028,767 | +$2,967,781 | +8.01% | |
| Federated Hermes, Inc. | 0.05% | 2,352,927 | $36,140,959 | $39,035,059 | +$2,894,100 | +8.01% | |
| Point72 Asset Management, L.P. | 0.05% | 1,993,837 | $30,625,336 | $33,077,756 | +$2,452,420 | +8.01% | |
| Vanguard Capital Management Llc | 0.00% | 1,857,351 | $28,528,911 | $30,813,453 | +$2,284,542 | +8.01% | |
| Tcg Crossover Management, Llc | 0.66% | 1,789,617 | $27,488,517 | $29,689,746 | +$2,201,229 | +8.01% | |
| Alyeska Investment Group, L.P. | 0.07% | 1,647,140 | $25,300,070 | $27,326,053 | +$2,025,983 | +8.01% | |
| Wellington Management Group Llp | 0.00% | 1,507,360 | $23,153,049 | $25,007,102 | +$1,854,053 | +8.01% | |
| Vanguard Portfolio Management Llc | 0.00% | 1,330,710 | $20,439,706 | $22,076,479 | +$1,636,773 | +8.01% | |
| Two Sigma Investments, Lp | 0.01% | 1,207,250 | $18,543,360 | $20,028,278 | +$1,484,918 | +8.01% | |
| Geode Capital Management, Llc | 0.00% | 1,204,150 | $18,499,798 | $19,976,849 | +$1,477,051 | +7.98% | |
| Citadel Advisors Llc | 0.01% | 1,200,737 | $18,443,321 | $19,920,227 | +$1,476,906 | +8.01% | |
| Algert Global Llc | 0.20% | 1,110,889 | $17,063,255 | $18,429,649 | +$1,366,394 | +8.01% | |
| D. E. Shaw & Co., Inc. | 0.01% | 1,096,509 | $16,842,378 | $18,191,084 | +$1,348,706 | +8.01% | |
| Goldman Sachs Group Inc | 0.00% | 952,675 | $14,633,088 | $15,804,878 | +$1,171,790 | +8.01% | |
| Bank Of America Corp | 0.00% | 910,460 | $13,984,665 | $15,104,531 | +$1,119,866 | +8.01% | |
| Morgan Stanley | 0.00% | 836,966 | $12,855,801 | $13,885,266 | +$1,029,465 | +8.01% | |
| Nantahala Capital Management, Llc | 0.75% | 809,914 | $12,440,279 | $13,436,473 | +$996,194 | +8.01% | |
| Qube Research & Technologies Ltd | 0.01% | 702,057 | $10,783,596 | $11,647,126 | +$863,530 | +8.01% | |
| Squarepoint Ops Llc | 0.02% | 532,321 | $8,176,451 | $8,831,205 | +$654,754 | +8.01% | |
| Orbimed Advisors Llc | 0.15% | 524,700 | $8,059,392 | $8,704,773 | +$645,381 | +8.01% | |
| Millennium Management Llc | 0.01% | 504,544 | $7,749,796 | $8,370,385 | +$620,589 | +8.01% | |
| Hrt Financial Lp | 0.01% | 491,001 | $7,541,000 | $8,145,707 | +$604,707 | +8.02% | |
| Adar1 Capital Management, Llc | 0.30% | 420,881 | $6,464,732 | $6,982,416 | +$517,684 | +8.01% | |
| Northern Trust Corp | 0.00% | 398,366 | $6,118,902 | $6,608,892 | +$489,990 | +8.01% | |
| Jane Street Group, Llc | 0.00% | 391,991 | $6,020,981 | $6,503,131 | +$482,150 | +8.01% | |
| Nationale-Nederlanden Powszechne Towarzystwo Emerytalne S.A. | 0.32% | 376,496 | $5,782,979 | $6,246,069 | +$463,090 | +8.01% | |
| Woodline Partners Lp | 0.02% | 370,032 | $5,683,692 | $6,138,831 | +$455,139 | +8.01% | |
| Charles Schwab Investment Management Inc | 0.00% | 369,191 | $5,670,774 | $6,124,879 | +$454,105 | +8.01% | |
| Rock Springs Capital Management Lp | 0.28% | 367,009 | $5,637,258 | $6,088,679 | +$451,421 | +8.01% | |
| Jump Financial, Llc | 0.05% | 361,665 | $5,555,174 | $6,000,022 | +$444,848 | +8.01% | |
| Dimensional Fund Advisors Lp | 0.00% | 359,725 | $5,525,376 | $5,967,838 | +$442,462 | +8.01% | |
| Vanguard Fiduciary Trust Co | 0.00% | 315,271 | $4,842,563 | $5,230,346 | +$387,783 | +8.01% | |
| Panagora Asset Management Inc | 0.01% | 269,113 | $4,133,576 | $4,464,585 | +$331,009 | +8.01% | |
| Man Group Plc | 0.01% | 248,801 | $3,821,583 | $4,127,609 | +$306,026 | +8.01% | |
| Balyasny Asset Management L.P. | 0.01% | 211,635 | $3,250,714 | $3,511,025 | +$260,311 | +8.01% | |
| Bnp Paribas Financial Markets | 0.00% | 209,593 | $3,219,348 | $3,477,148 | +$257,800 | +8.01% | |
| Y-Intercept (Hong Kong) Ltd | 0.06% | 196,487 | $3,018,040 | $3,259,719 | +$241,679 | +8.01% | |
| Jpmorgan Chase & Co | 0.00% | 178,535 | $2,736,049 | $2,961,896 | +$225,847 | +8.25% | |
| Allspring Global Investments Holdings, Llc | 0.00% | 166,092 | $2,434,909 | $2,755,466 | +$320,557 | +13.17% | |
| Bml Capital Management, Llc | 1.36% | 154,961 | $2,380,201 | $2,570,803 | +$190,602 | +8.01% | |
| Ubs Group Ag | 0.00% | 150,701 | $2,314,767 | $2,500,130 | +$185,363 | +8.01% | |
| Bank Of New York Mellon Corp | 0.00% | 135,072 | $2,074,706 | $2,240,844 | +$166,138 | +8.01% | |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | 133,870 | $2,056,243 | $2,220,903 | +$164,660 | +8.01% | |
| Thrivent Financial For Lutherans | 0.00% | 115,030 | $1,766,000 | $1,908,348 | +$142,348 | +8.06% | |
| Aqr Capital Management Llc | 0.00% | 108,077 | $1,660,063 | $1,792,997 | +$132,934 | +8.01% |
Frequently asked questions about JANX
Who owns the most JANX stock?
The largest holders of JANX are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for JANUX THERAPEUTICS INC (JANX).
Is JANX widely held by superinvestors?
Many widely followed stocks like JANX appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly JANX is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.