Ticker · CUSIP 126389105
Holders (tracked)
1
Combined shares
286,126
Combined value
$3.58M
Last close
$9.06
Quarter
2025Q4
Price · 1Y$9.06-6.23 (-40.76%)H $16.97 · L $7.94 · Avg Vol 25K
Tracked holders · last 8 quarters
Flat over the last 8 quarters.
Price is -27.5% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
3 events
- Renaissance Technologies trimmed2026-02-12−20,400 shares · 2025Q4Position
- Izzy Englander (Millennium Mgmt) exited2025-11-14−19,447 shares · 2025Q3Position
- Renaissance Technologies added2025-11-13+3,000 shares · 2025Q3Position
Insider activity
No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of CSPI…
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 |
|---|---|---|---|---|
| Renaissance Technologies | 2016Q1 | $14.65 | -38.2% | $2.6M |
Who moved on this name in 2025Q4
Position changes reported for the latest quarter, grouped by direction.
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 2 | $1.6M |
| 2022Q2 | 2 | $1.8M |
| 2022Q3 | 2 | $1.3M |
| 2022Q4 | 2 | $1.6M |
| 2023Q1 | 2 | $2.3M |
| 2023Q2 | 2 | $2.1M |
| 2023Q3 | 2 | $3.2M |
| 2023Q4 | 2 | $3.5M |
| 2024Q1 | 3 | $9.7M |
| 2024Q2 | 3 | $7.8M |
| 2024Q3 | 2 | $5.4M |
| 2024Q4 | 2 | $5.9M |
| 2025Q1 | 2 | $6.3M |
| 2025Q2 | 2 | $4.2M |
| 2025Q3 | 1 | $3.5M |
| 2025Q4 | 1 | $3.6M |
Who owns CSPI
1 super-investors · 2025Q4
Tracked stake
286.1K
shares
Combined value
$4M
% of shares outstanding
—
shares-out unknown
Quarter action mix
Trim1
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Renaissance Technologies | 286.1K | $4M |
Recent moves
20 transactions
- −20,400 · 2025Q4
- −19,447 · 2025Q3
- +3,000 · 2025Q3
- −88,470 · 2025Q2
- −700 · 2025Q2
- +79,347 · 2025Q1
- −35,121 · 2025Q1
- +4,659 · 2024Q4
- −54,579 · 2024Q4
- −22,863 · 2024Q3
- −48,300 · 2024Q3
- −14,614 · 2024Q2
- TRIMBlackRock−4,678 · 2024Q2
- +15,800 · 2024Q2
- +61,388 · 2024Q1
- +264,063 · 2024Q1
- ADDBlackRock+20,747 · 2024Q1
- −7,700 · 2023Q4
- TRIMBlackRock−96 · 2023Q4
- +8,800 · 2023Q3
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- CSPI insider tradingEvery Form 4 filing by CSPI officers, directors, and 10%+ holders.
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