Ticker · CUSIP 15687V109
Holders (tracked)
9
Combined shares
6,616,972
Combined value
$58.29M
Last close
$6.22
Quarter
2025Q4
Price · 1Y$6.22-7.93 (-56.04%)H $14.47 · L $5.41 · Avg Vol 2.3M
Position opened
Tracked holders · last 8 quarters
-1 vs previous quarter over the last 8.
Price is -29.4% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
19 events
- T. Rowe Price added2026-02-17+15,722 shares · 2025Q4Position
- Ken Griffin (Citadel Advisors) added2026-02-17+2,035,801 shares · 2025Q4Position
- D.E. Shaw & Co. added2026-02-17+78,669 shares · 2025Q4Position
- AQR Capital Management trimmed2026-02-17−56,026 shares · 2025Q4Position
- Two Sigma Investments trimmed2026-02-17−220,394 shares · 2025Q4Position
- Izzy Englander (Millennium Mgmt) trimmed2026-02-17−262,625 shares · 2025Q4Position
- −19,122 shares · 2025Q4Position
- Renaissance Technologies trimmed2026-02-12−93,020 shares · 2025Q4Position
- Mario Gabelli (GAMCO) opened position2026-02-05+10,200 shares · 2025Q4Position
- Izzy Englander (Millennium Mgmt) added2025-11-14+1,903,026 shares · 2025Q3Position
- Two Sigma Investments added2025-11-14+61,734 shares · 2025Q3Position
- D.E. Shaw & Co. added2025-11-14+22,450 shares · 2025Q3Position
- T. Rowe Price added2025-11-14+7,205 shares · 2025Q3Position
- AQR Capital Management added2025-11-14+30,678 shares · 2025Q3Position
- +19,122 shares · 2025Q3Position
- Renaissance Technologies trimmed2025-11-13−174,180 shares · 2025Q3Position
- Norges Bank (Norway SWF) exited2025-11-13−36,303 shares · 2025Q3Position
- Norges Bank (Norway SWF) trimmed2025-11-12−24,049 shares · 2024Q3Position
- Mario Gabelli (GAMCO) exited2025-11-12−12,000 shares · 2025Q3Position
Insider activity
No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of CERT…
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) | 2020Q4 | $8.84 | -29.6% | $19.8M |
| Ken Griffin (Citadel Advisors) | 2020Q4 | $8.84 | -29.6% | $19.8M |
| Izzy Englander (Millennium Mgmt) | 2020Q4 | $8.99 | -30.8% | $16.5M |
| D.E. Shaw & Co. | 2021Q1 | $10.85 | -42.7% | $911K |
| Two Sigma Investments | 2021Q3 | $11.80 | -47.3% | $1.4M |
| AQR Capital Management | 2021Q4 | $12.08 | -48.5% | $1.5M |
| Mario Gabelli (GAMCO) | 2023Q3 | $14.45 | -56.9% | $63K |
| Renaissance Technologies | 2021Q2 | $14.74 | -57.8% | $184K |
| T. Rowe Price | 2020Q4 | $22.11 | -71.9% | $654K |
Who moved on this name in 2025Q4
Position changes reported for the latest quarter, grouped by direction.
New positions1
- Mario Gabelli (GAMCO)+10,200$90K
Added to3
- Ken Griffin (Citadel Advisors)+2,035,801$17.9M
- D.E. Shaw & Co.+78,669$693K
- T. Rowe Price+15,722$139
Trimmed4
- Izzy Englander (Millennium Mgmt)−262,625$2.3M
- Two Sigma Investments−220,394$1.9M
- Renaissance Technologies−93,020$820K
- AQR Capital Management−56,026$493K
Exited1
- Ray Dalio (Bridgewater Associates)−19,122$234K
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 11 | $17.58B |
| 2022Q2 | 10 | $16.29B |
| 2022Q3 | 13 | $271.2M |
| 2022Q4 | 12 | $294.6M |
| 2023Q1 | 13 | $652.5M |
| 2023Q2 | 11 | $488.0M |
| 2023Q3 | 13 | $380.4M |
| 2023Q4 | 13 | $444.5M |
| 2024Q1 | 12 | $439.8M |
| 2024Q2 | 12 | $315.3M |
| 2024Q3 | 11 | $30.8M |
| 2024Q4 | 12 | $41.7M |
| 2025Q1 | 10 | $18.6M |
| 2025Q2 | 11 | $33.0M |
| 2025Q3 | 10 | $64.5M |
| 2025Q4 | 9 | $58.3M |
Who owns CERT
9 super-investors · 2025Q4
Tracked stake
6.62M
shares
Combined value
$58M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New1Added4Trim4
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Ken Griffin Citadel Advisors | 3.19M | $28M |
| 2 | Izzy Englander Millennium Mgmt | 2.65M | $23M |
| 3 | AQR Capital Management | 236.6K | $2M |
| 4 | Two Sigma Investments | 220.6K | $2M |
| 5 | D.E. Shaw & Co. | 146.4K | $1M |
| 6 | T. Rowe Price | 105.1K | $926K |
| 7 | Renaissance Technologies | 29.6K | $261K |
| 8 | Ken Griffin Citadel Advisors | 24.8K | $218K |
| 9 | Mario Gabelli GAMCO | 10.2K | $90K |
Recent moves
20 transactions
- +78,669 · 2025Q4
- +2,035,801 · 2025Q4
- +15,722 · 2025Q4
- −220,394 · 2025Q4
- −56,026 · 2025Q4
- −262,625 · 2025Q4
- −19,122 · 2025Q4
- −93,020 · 2025Q4
- +10,200 · 2025Q4
- +30,678 · 2025Q3
- +7,205 · 2025Q3
- +22,450 · 2025Q3
- +1,903,026 · 2025Q3
- +61,734 · 2025Q3
- −36,303 · 2025Q3
- −174,180 · 2025Q3
- +19,122 · 2025Q3
- −12,000 · 2025Q3
- −24,049 · 2024Q3
- +309,813 · 2025Q2
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