Ticker · CUSIP 23283X206
Holders (tracked)
3
Combined shares
259,604
Combined value
$165.9K
Last close
$0.66
Quarter
2025Q4
Price · 1Y$0.66-0.37 (-35.92%)H $1.29 · L $0.55 · Avg Vol 123K
Position opened
Tracked holders · last 8 quarters
+1 vs previous quarter over the last 8.
Price is +3.3% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
4 events
- Ken Griffin (Citadel Advisors) added2026-02-17+83,589 shares · 2025Q4Position
- +10,205 shares · 2025Q4Position
- Renaissance Technologies trimmed2026-02-12−34,685 shares · 2025Q4Position
- Renaissance Technologies added2025-11-13+18,166 shares · 2025Q3Position
Insider activity
No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of CTSO…
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) | 2016Q3 | $0.83 | -20.6% | $99K |
| Renaissance Technologies | 2018Q2 | $1.77 | -62.6% | $66K |
| Izzy Englander (Millennium Mgmt) | 2016Q4 | $1.87 | -64.7% | $7K |
Who moved on this name in 2025Q4
Position changes reported for the latest quarter, grouped by direction.
New positions1
- Izzy Englander (Millennium Mgmt)+10,205$7K
Added to1
- Ken Griffin (Citadel Advisors)+83,589$53K
Trimmed1
- Renaissance Technologies−34,685$22K
Exited0
—
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 3 | $8.6M |
| 2022Q2 | 4 | $3.4M |
| 2022Q3 | 3 | $1.6M |
| 2022Q4 | 3 | $1.7M |
| 2023Q1 | 6 | $3.7M |
| 2023Q2 | 6 | $4.0M |
| 2023Q3 | 6 | $2.0M |
| 2023Q4 | 3 | $1.1M |
| 2024Q1 | 3 | $796K |
| 2024Q2 | 5 | $536K |
| 2024Q3 | 3 | $186K |
| 2024Q4 | 3 | $125K |
| 2025Q1 | 4 | $248K |
| 2025Q2 | 2 | $186K |
| 2025Q3 | 2 | $187K |
| 2025Q4 | 3 | $166K |
Who owns CTSO
3 super-investors · 2025Q4
Tracked stake
259.6K
shares
Combined value
$166K
% of shares outstanding
—
shares-out unknown
Quarter action mix
New1Added1Trim1
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Ken Griffin Citadel Advisors | 149.3K | $95K |
| 2 | Renaissance Technologies | 100.1K | $64K |
| 3 | Izzy Englander Millennium Mgmt | 10.2K | $7K |
Recent moves
20 transactions
- +83,589 · 2025Q4
- +10,205 · 2025Q4
- −34,685 · 2025Q4
- +18,166 · 2025Q3
- −108,615 · 2025Q2
- −33,280 · 2025Q1
- +137,234 · 2025Q1
- +33,280 · 2024Q4
- +8,400 · 2024Q4
- −19,941 · 2024Q3
- +3,800 · 2024Q3
- −15,902 · 2024Q2
- TRIMBlackRock−66,630 · 2024Q2
- −3,800 · 2024Q2
- −9,285 · 2024Q1
- −95,700 · 2024Q1
- TRIMBlackRock−3,885 · 2024Q1
- −119,931 · 2023Q4
- +56,220 · 2023Q4
- TRIMBlackRock−444 · 2023Q4
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