Ticker · CUSIP 19243B102
Holders (tracked)
5
Combined shares
1,263,100
Combined value
$1.71M
Last close
$1.19
Quarter
2025Q4
Price · 1Y$1.19+0.82 (+219.89%)H $3.18 · L $0.24 · Avg Vol 3.8M
Position opened
Tracked holders · last 8 quarters
+1 vs previous quarter over the last 8.
Price is -11.9% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
8 events
- +161,201 shares · 2025Q4Position
- Two Sigma Investments trimmed2026-02-17−49,262 shares · 2025Q4Position
- Izzy Englander (Millennium Mgmt) trimmed2026-02-17−495,896 shares · 2025Q4Position
- Renaissance Technologies added2026-02-12+256,013 shares · 2025Q4Position
- +560,553 shares · 2025Q3Position
- Two Sigma Investments added2025-11-14+1,792 shares · 2025Q3Position
- Renaissance Technologies added2025-11-13+617,100 shares · 2025Q3Position
- Mario Gabelli (GAMCO) opened position2025-11-12+20,000 shares · 2025Q3Position
Insider activity
No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of CGTX…
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 |
|---|---|---|---|---|
| Two Sigma Investments | 2021Q4 | $1.00 | +18.8% | $57K |
| Mario Gabelli (GAMCO) | 2025Q3 | $1.35 | -11.9% | $24K |
| Renaissance Technologies | 2021Q4 | $1.35 | -11.9% | $1.2M |
| Ken Griffin (Citadel Advisors) | 2022Q1 | $1.47 | -18.9% | $192K |
| Izzy Englander (Millennium Mgmt) | 2021Q4 | $1.47 | -19.1% | $77K |
Who moved on this name in 2025Q4
Position changes reported for the latest quarter, grouped by direction.
New positions1
- Ken Griffin (Citadel Advisors)+161,201$218K
Added to1
- Renaissance Technologies+256,013$346K
Trimmed2
- Izzy Englander (Millennium Mgmt)−495,896$669K
- Two Sigma Investments−49,262$67K
Exited0
—
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 4 | $206K |
| 2022Q2 | 1 | $58K |
| 2022Q3 | 2 | $102K |
| 2022Q4 | 2 | $175K |
| 2023Q1 | 2 | $131K |
| 2023Q2 | 1 | $107K |
| 2023Q3 | 1 | $81K |
| 2023Q4 | 2 | $125K |
| 2024Q1 | 2 | $385K |
| 2024Q2 | 4 | $470K |
| 2024Q3 | 2 | $47K |
| 2024Q4 | 2 | $102K |
| 2025Q1 | 2 | $58K |
| 2025Q2 | 2 | $59K |
| 2025Q3 | 4 | $1.9M |
| 2025Q4 | 5 | $1.7M |
Who owns CGTX
5 super-investors · 2025Q4
Tracked stake
1.26M
shares
Combined value
$2M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New1Added1Trim2Held1
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Renaissance Technologies | 969.5K | $1M |
| 2 | Ken Griffin Citadel Advisors | 161.2K | $218K |
| 3 | Izzy Englander Millennium Mgmt | 64.7K | $87K |
| 4 | Two Sigma Investments | 47.7K | $64K |
| 5 | Mario Gabelli GAMCO | 20.0K | $27K |
Recent moves
20 transactions
- −495,896 · 2025Q4
- −49,262 · 2025Q4
- +161,201 · 2025Q4
- +256,013 · 2025Q4
- +1,792 · 2025Q3
- +560,553 · 2025Q3
- +617,100 · 2025Q3
- +20,000 · 2025Q3
- +12,655 · 2025Q2
- +40,700 · 2025Q2
- +28,853 · 2025Q1
- −35,400 · 2025Q1
- +42,321 · 2024Q4
- +2,400 · 2024Q4
- −13,624 · 2024Q3
- +11,370 · 2024Q3
- −1,018 · 2024Q3
- +13,624 · 2024Q2
- ADDBlackRock+96,761 · 2024Q2
- −65,982 · 2024Q2
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