Cytosorbents Corporation
Cytosorbents Corporation (CTSO) Insider Trading
Form 4 buy vs sell counts, ratio, and sentiment — switch this quarter or last 12 months; chart and transactions below.
SEC EDGAR · FMP · CTSO · as of Jun 9, 2026
Activity summary
Buy transactions
3
P-Purchase only
Sell transactions
0
12 Months
Buy/Sell ratio
∞
Buy/Sell (by trades)
Overall sentiment
Cytosorbents Corporation insiders have been net buyers of shares over the past 12 Months, which may signal confidence in the company's outlook.
▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · Buy = P-Purchase only · Sell = S-Sale only
As of Jun 9, 2026
CTSO insider buying and selling by quarter
CTSO insider selling · CTSO insider buying stocks · quarterly insider activity
Mobile shows last 4Q · Desktop shows full 8Q
▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · last 8 quarters
As of Jun 9, 2026
Active insiders
Most active in past 12 months · CTSO ceo insider trading
Showing all insiders · Click a card to filter the transactions table below
▸ Aggregated from reportingName · top 5 by trade count (12M) · no extra API
Recent insider transactions
CTSO executive sell shares · CTSO board member insider trading · CTSO insider trading SEC filing
Scroll horizontally to see all columns
| Date | Insider | Type | Shares | Value | Filing |
|---|---|---|---|---|---|
| Nov 18, 2025 | Chan Phillip P. CEO · Director | Award | 100,000 | $64K | Form 4 |
| Aug 8, 2025 | Chan Phillip P. CEO · Director | Award | 105,600 | — | Form 4 |
| Aug 8, 2025 | MARIANI PETER J CFO | Award | 71,500 | — | Form 4 |
| Aug 8, 2025 | Capponi Vincent President and COO | Award | 89,100 | — | Form 4 |
| Aug 8, 2025 | Deliargyris Efthymios Chief Medical Officer | Award | 70,000 | — | Form 4 |
| Feb 24, 2025 | BATOR MICHAEL G. Director | Other | 10,000 | $11K | Form 4 |
| Feb 24, 2025 | Capponi Vincent President and COO | Other | 12,000 | $14K | Form 4 |
| Feb 24, 2025 | MARIANI PETER J CFO | Other | 32,625 | $37K | Form 4 |
| Feb 24, 2025 | Chan Phillip P. CEO · Director | Other | 34,168 | $39K | Form 4 |
| Feb 24, 2025 | Sobel Alan D. Director | Other | 21,950 | $25K | Form 4 |
| Jan 17, 2025 | BATOR MICHAEL G. Director | Other | 15,879 | $16K | Form 4 |
| Jan 17, 2025 | Capponi Vincent President and COO | Other | 31,760 | $32K | Form 4 |
| Jan 17, 2025 | Deliargyris Efthymios Chief Medical Officer | Other | 16,233 | $16K | Form 4 |
| Jan 17, 2025 | Sobel Alan D. Director | Other | 21,950 | $22K | Form 4 |
| Jan 17, 2025 | Chan Phillip P. CEO · Director | Other | 90,832 | $91K | Form 4 |
| Jan 17, 2025 | MARIANI PETER J CFO | Other | 32,625 | $33K | Form 4 |
| Dec 13, 2024 | MARIANI PETER J CFO | Purchase | 20,000 | $19K | Form 4 |
| Dec 12, 2024 | MARIANI PETER J CFO | Purchase | 20,000 | $18K | Form 4 |
| Dec 11, 2024 | MARIANI PETER J CFO | Purchase | 11,363 | $10K | Form 4 |
| Aug 14, 2024 | MARIANI PETER J CFO | Award | 175,000 | — | Form 4 |
| Aug 14, 2024 | MARIANI PETER J CFO | Award | 65,000 | — | Form 4 |
| Aug 14, 2024 | MARIANI PETER J CFO | Award | 110,000 | — | Form 4 |
| Apr 2, 2024 | Deliargyris Efthymios Chief Medical Officer | Award | 61,000 | — | Form 4 |
| Apr 2, 2024 | BLOCH KATHLEEN P. CFO | Award | 65,000 | — | Form 4 |
| Apr 2, 2024 | Capponi Vincent President and COO | Award | 81,000 | — | Form 4 |
Deliargyris Efthymios
Chief Medical Officer
Date
Aug 8
Shares
70,000
Price
—
Value
—
Capponi Vincent
President and COO
Date
Feb 24
Shares
12,000
Price
$1.13
Value
$14K
Capponi Vincent
President and COO
Date
Jan 17
Shares
31,760
Price
$1.00
Value
$32K
Deliargyris Efthymios
Chief Medical Officer
Date
Jan 17
Shares
16,233
Price
$1.00
Value
$16K
Deliargyris Efthymios
Chief Medical Officer
Date
Apr 2
Shares
61,000
Price
—
Value
—
⚡ = value ≥ $1M · Award/Option price shows — · formType=4 · securityName=Common Stock · url → sec.gov/Archives/edgar
▸ Source: SEC EDGAR · Form 4 filings · ⚡ = value ≥ $1M · Award/Option price shows —
About CTSO insider trading
CTSO insider trades
Cytosorbents Corporation (CTSO) insider trading data is sourced from SEC Form 4 filings submitted by corporate insiders, including Chan Phillip P. (CEO · Director), MARIANI PETER J (CFO), Capponi Vincent (President and COO). Over the past 12 months, 4 insiders have filed transactions with the SEC. CTSO insiders have been primarily buying, which may reflect pre-scheduled Rule 10b5-1 plan executions.
For Cytosorbents Corporation's institutional ownership breakdown and insider ownership percentage, see the Ownership tab → Ownership tab →
Frequently asked questions
CTSO insider trading · 5 questionsThe insiders of Cytosorbents Corporation (CTSO) include executives and directors such as Chan Phillip P. (CEO · Director), MARIANI PETER J (CFO), Capponi Vincent (President and COO), among others. Over the past 12 months, 4 insiders have filed Form 4 transactions with the SEC. Insider transactions are required to be reported within 2 business days of the trade date.
▸ Source: FMP /stable/insider-trading/search · SEC EDGAR Form 3 & 4 · acquisitionOrDisposition A=Buy, D=Sell · RSU vesting (M-Exempt) excluded from sentiment bar · As of Jun 9, 2026