Ticker · CUSIP 47103J105
Holders (tracked)
10
Combined shares
5,424,597
Combined value
$74.86M
Last close
$15.82
Quarter
2025Q4
Price · 1Y$15.82-13.87 (-46.72%)H $34.74 · L $12.18 · Avg Vol 1.2M
Position opened
Tracked holders · last 8 quarters
+2 vs previous quarter over the last 8.
Price is +14.6% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
14 events
- Ken Griffin (Citadel Advisors) added2026-02-17+301,360 shares · 2025Q4Position
- D.E. Shaw & Co. opened position2026-02-17+32,707 shares · 2025Q4Position
- Two Sigma Investments added2026-02-17+367,533 shares · 2025Q4Position
- Izzy Englander (Millennium Mgmt) added2026-02-17+189,163 shares · 2025Q4Position
- Steve Cohen (Point72) trimmed2026-02-17−748,381 shares · 2025Q4Position
- T. Rowe Price trimmed2026-02-17−521,090 shares · 2025Q4Position
- Wellington Management added2026-02-17+908,582 shares · 2025Q4Position
- +79,158 shares · 2025Q4Position
- −113,749 shares · 2025Q3Position
- Izzy Englander (Millennium Mgmt) trimmed2025-11-14−113,717 shares · 2025Q3Position
- Steve Cohen (Point72) trimmed2025-11-14−433,700 shares · 2025Q3Position
- Two Sigma Investments trimmed2025-11-14−906 shares · 2025Q3Position
- T. Rowe Price trimmed2025-11-14−527,871 shares · 2025Q3Position
- Wellington Management added2025-11-14+209,243 shares · 2025Q3Position
Insider activity
No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of JANX…
Cost basis inferred from each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.
| Investor | First in | Cost basis | Return | Position value today |
|---|---|---|---|---|
| Ken Griffin (Citadel Advisors) | 2021Q2 | $13.92 | +13.6% | $17.5M |
| Ken Griffin (Citadel Advisors) | 2021Q2 | $13.92 | +13.6% | $17.5M |
| Ken Griffin (Citadel Advisors) | 2021Q2 | $13.92 | +13.6% | $17.5M |
| Two Sigma Investments | 2023Q3 | $17.01 | -7.0% | $7.5M |
| Wellington Management | 2021Q2 | $19.06 | -17.0% | $25.5M |
| Izzy Englander (Millennium Mgmt) | 2021Q2 | $20.77 | -23.8% | $4.6M |
| Steve Cohen (Point72) | 2024Q2 | $27.40 | -42.3% | $15.2M |
| Paul Tudor Jones (Tudor Investment) | 2024Q1 | $32.61 | -51.5% | $1.3M |
| D.E. Shaw & Co. | 2021Q3 | $39.51 | -60.0% | $517K |
| T. Rowe Price | 2024Q1 | $41.49 | -61.9% | $11.8M |
Who moved on this name in 2025Q4
Position changes reported for the latest quarter, grouped by direction.
New positions2
- Paul Tudor Jones (Tudor Investment)+79,158$1.1M
- D.E. Shaw & Co.+32,707$451K
Added to4
- Wellington Management+908,582$12.5M
- Two Sigma Investments+367,533$5.1M
- Ken Griffin (Citadel Advisors)+301,360$4.2M
- Izzy Englander (Millennium Mgmt)+189,163$2.6M
Trimmed2
- Steve Cohen (Point72)−748,381$10.3M
- T. Rowe Price−521,090$7K
Exited0
—
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 3 | $43.4M |
| 2022Q2 | 2 | $37.4M |
| 2022Q3 | 2 | $42.0M |
| 2022Q4 | 5 | $40.3M |
| 2023Q1 | 5 | $37.2M |
| 2023Q2 | 6 | $41.3M |
| 2023Q3 | 7 | $52.6M |
| 2023Q4 | 6 | $53.7M |
| 2024Q1 | 10 | $169.1M |
| 2024Q2 | 12 | $194.8M |
| 2024Q3 | 9 | $81.9M |
| 2024Q4 | 9 | $178.0M |
| 2025Q1 | 9 | $85.8M |
| 2025Q2 | 8 | $141.2M |
| 2025Q3 | 8 | $115.1M |
| 2025Q4 | 10 | $74.9M |
Who owns JANX
10 super-investors · 2025Q4
Tracked stake
5.42M
shares
Combined value
$75M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New2Added6Trim2
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Wellington Management | 1.61M | $22M |
| 2 | Ken Griffin Citadel Advisors | 1.10M | $15M |
| 3 | Steve Cohen Point72 | 961.8K | $13M |
| 4 | T. Rowe Price | 744.5K | $10M |
| 5 | Two Sigma Investments | 471.0K | $6M |
| 6 | Izzy Englander Millennium Mgmt | 289.8K | $4M |
| 7 | Ken Griffin Citadel Advisors | 83.8K | $1M |
| 8 | Paul Tudor Jones Tudor Investment | 79.2K | $1M |
| 9 | Ken Griffin Citadel Advisors | 47.5K | $656K |
| 10 | D.E. Shaw & Co. | 32.7K | $451K |
Recent moves
20 transactions
- −748,381 · 2025Q4
- +301,360 · 2025Q4
- TRIMT. Rowe Price−521,090 · 2025Q4
- +367,533 · 2025Q4
- +79,158 · 2025Q4
- +32,707 · 2025Q4
- +908,582 · 2025Q4
- +189,163 · 2025Q4
- −113,749 · 2025Q3
- −113,717 · 2025Q3
- −433,700 · 2025Q3
- +209,243 · 2025Q3
- −906 · 2025Q3
- TRIMT. Rowe Price−527,871 · 2025Q3
- +132,089 · 2025Q2
- +1,767,238 · 2025Q2
- +98,884 · 2025Q2
- +104,382 · 2025Q2
- +400,601 · 2025Q2
- −60,601 · 2025Q2
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