Insider Tracker SEC Form 4 insider trades
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CTSO

Cytosorbents Corp

Healthcare Surgical & Medical Instruments & Apparatus Market cap: $311.7M All insider activity → Quote and statistics → Sign in to watch CTSO Sign in to set a price alert
64
Insider Score Band 60–79

Research score, not a recommendation.

Total bought$119.8K15 Form 4 purchases
Distinct insiders7open-market buyers
Lead insiderChan Phillip P.CEO
Cluster window2022-05-06 → 2022-06-21closed

Market data

Live quote and chart from Yahoo Finance, loaded through this server. Insider purchases are marked on the chart.

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Why this score

Research score: a weighted blend of the five factors, times the routine and offering discounts, minus the selling penalty.

Breadth number & diversity of participating insiders
100%
Seniority executive rank of buyers (CEO/CFO/Director)
93%
Commitment purchase size relative to company & holdings
55%
Context buying into stock weakness signals conviction
100%
Timing coordinated purchases within a tight window
92%
Routine-purchase discount × 0.93
Company-type / offering discount × 1.00
Net insider selling penalty − 0

Why are they buying?

No explanation has been generated for this cluster. The filings in the table below are the primary evidence.

Stock Price & Insider Purchase History

Daily close price with open-market insider purchases plotted over time

Loading price history…

Transactions

15 Form 4 trades · 7 insiders Sign in to download CSV
Purchases in this cluster, grouped by insider, largest first
Date Insider Role Shares Price Value Flags Filing
2022-06-09 → 2022-06-16 Chan Phillip P. 13 purchases with a 63-day result · median -2.6% CEO 18,221 $2.13 avg $38.8K
routine 10b5-1
2022-06-09 Chan Phillip P. 16,000 $2.17 $34.7K
SEC filing for Chan Phillip P. (opens in a new tab)
2022-06-16 Chan Phillip P. 2,221 $1.85 $4.1K
routine 10b5-1
SEC filing for Chan Phillip P. (opens in a new tab)
2022-05-11 Sobel Alan D. history of Sobel Alan D.'s purchases Director 10,000 $2.02 avg $20.2K
2022-05-11 Sobel Alan D. 8,800 $2.02 $17.8K
SEC filing for Sobel Alan D. (opens in a new tab)
2022-05-11 Sobel Alan D. 1,200 $2.00 $2.4K
SEC filing for Sobel Alan D. (opens in a new tab)
2022-05-23 → 2022-06-21 Capponi Vincent 4 purchases with a 63-day result · median -5.7% President 10,000 $1.98 avg $19.8K
routine 10b5-1
2022-05-23 Capponi Vincent 3,127 $2.03 $6.3K
SEC filing for Capponi Vincent (opens in a new tab)
2022-05-23 Capponi Vincent 299 $2.03 $607
SEC filing for Capponi Vincent (opens in a new tab)
2022-05-23 Capponi Vincent 1,574 $2.04 $3.2K
SEC filing for Capponi Vincent (opens in a new tab)
2022-06-16 Capponi Vincent 3,000 $2.00 $6.0K
routine 10b5-1
SEC filing for Capponi Vincent (opens in a new tab)
2022-06-21 Capponi Vincent 2,000 $1.80 $3.6K
routine 10b5-1
SEC filing for Capponi Vincent (opens in a new tab)
2022-06-06 BLOCH KATHLEEN P. 11 purchases with a 63-day result · median -6.9% CFO 8,700 $1.90 $16.5K
SEC filing for BLOCH KATHLEEN P. (opens in a new tab)
2022-05-18 BATOR MICHAEL G. 4 purchases with a 63-day result · median -4.4% Director 5,000 $2.19 avg $11.0K
2022-05-18 BATOR MICHAEL G. 1,000 $2.21 $2.2K
SEC filing for BATOR MICHAEL G. (opens in a new tab)
2022-05-18 BATOR MICHAEL G. 2,000 $2.20 $4.4K
SEC filing for BATOR MICHAEL G. (opens in a new tab)
2022-05-18 BATOR MICHAEL G. 2,000 $2.18 $4.4K
SEC filing for BATOR MICHAEL G. (opens in a new tab)
2022-05-06 Kraus Al history of Kraus Al's purchases Director 5,000 $1.96 $9.8K
SEC filing for Kraus Al (opens in a new tab)
2022-05-16 Jones Edward Raymond history of Jones Edward Raymond's purchases Director 1,676 $2.24 $3.8K
SEC filing for Jones Edward Raymond (opens in a new tab)
Total $119.8K

Other buying runs at CTSO

A run ends after a pause in the buying, so one company can have several. Returns are the stock's return minus its benchmark's (IWM for small companies, SPY otherwise), from the first open after the run became a cluster. Past results, not a forecast.

After this run became a cluster: 21 days -2.2%63 days -13.8%126 days -34.3%

Other insider buying runs at this company, newest first, with the return against the benchmark that followed
Window Insiders Total Score 21 days63 days126 days Status
2026-09-04 → 2026-09-15 3 $120.4K 64 -25.0%–– active
2023-12-13 8 $305.0K 71 -49.6%-61.1%-62.4% closed
2017-05-15 → 2017-06-09 6 $80.6K 54 +11.6%+53.7%+61.1% closed