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Of the 12 tracked institutions holding JANX, 4 have a 3-year clone track record — 4 of them beat the S&P. Average holder's clone alpha: +6.0pt. It's a gauge of who owns the name, not just how many.
Among the 12 tracked institutional investors we monitor, JANX (JANUX THERAPEUTICS INC) is held with a combined value of $473.80M across 31,152,106 shares. The largest holder is RA CAPITAL MANAGEMENT, L.P. with a position worth $171.87M (1.49% of their portfolio). 2 funds opened new positions in the most recent quarter. 7 funds increased their holdings. 2 funds reduced their position.
Total Institutional Value
$473.80M
Total Shares Held
31,152,106
Institutional Holders
12
Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.
| # | Fund | Value↓ | Portfolio % | Change |
|---|---|---|---|---|
| 1 | RA CAPITAL MANAGEMENT, L.P. | $171.87M | 1.49% | - |
| 2 | BlackRock, Inc. | $94.23M | 0.00% | +12.9% |
| 3 | STATE STREET CORP | $46.16M | 0.00% | +22.0% |
| 4 | VANGUARD GROUP INC | $40.11M | 0.00% | +20.2% |
| 5 | FMR LLC | $37.06M | 0.00% | -4.8% |
| 6 | Point72 Asset Management, L.P. | $30.63M | 0.05% | +72.5% |
| 7 | WELLINGTON MANAGEMENT GROUP LLP | $23.15M | 0.00% | -5.7% |
| 8 | CITADEL ADVISORS LLC | $18.44M | 0.01% | +240.9% |
| 9 | MILLENNIUM MANAGEMENT LLC | $7.75M | 0.01% | +30.4% |
| 10 | AQR CAPITAL MANAGEMENT LLC | $1.66M | 0.00% | New |
As of the latest SEC 13F filings, RA CAPITAL MANAGEMENT, L.P. is the largest institutional holder of JANX with a position worth $171.87M, representing 1.49% of their portfolio. In total, 12 institutional investors hold JANX with a combined value of $473.80M.
In the most recent quarter, 2 funds opened a new position in JANX. Additionally, 7 increased their holdings and 2 reduced their positions.
Institutional investors hold $473.80M worth of JANX stock across 12 positions. The largest institutional holder is RA CAPITAL MANAGEMENT, L.P. with $171.87M in holdings.
A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For JANX, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.
Get notified when hedge funds change their JANX positions.
Alpha = the manager's 3-year clone return minus the S&P 500. A skilled roster is a stronger tell than a crowded one — though even skilled managers' edge doesn't reliably survive the 13F disclosure lag. Why →
| 2026-08-13 |
| 6.7% | 2026-07-28 |
SEC Schedule 13D (activist) and 13G (passive) filings for JANX. Filed when an investor acquires 5%+ ownership.
Last Close
$16.93
2026-10-02
YTD
+24.0%
21% of 52-week range
