Cytosorbents (CTSO) stock: insider trades, news & valuation
Health Care · Strong buyingShare price and insider trades
Cytosorbents insider trading at a glance (Oct 9, 2026): in the past 12 months, 4 insiders bought $260K and 0 sold $0 of CTSO stock on the open market, including a cluster buy that began Sep 4, 2026.
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CTSO insider buying and selling by quarter
Open-market purchases (green, above the line) and sales (red, below), by trade date.
| Quarter | Bought | Purchases | Sold | Sales |
|---|---|---|---|---|
| Q4 2026 | — | 0 | — | 0 |
| Q3 2026 | $120K | 7 | — | 0 |
| Q2 2026 | $149K | 3 | — | 0 |
Valuation, profit and volume
Summary
Over the past 12 months, 4 Cytosorbents Corp insiders reported open-market purchases totaling $260K, while 0 insiders reported sales totaling $0. The most recent cluster buy began on Sep 4, 2026, when 3 insiders bought a combined $115K.
CTSO stock news and SEC filings
Recent 8-K filings and headlines. Tone is scored from the headline wording; “Policy” marks regulatory, trade or government topics.
Insider transactions
Open-market purchases and sales.
| Filed | Insider | Type | Shares | Price | Value | Since | Score |
|---|---|---|---|---|---|---|---|
| Sep 16SEC | Phillip P. ChanCEO | Buy | 3,774100,996 held (+4%) | $6.00 | $23K | -36.8% | — |
| Sep 16SEC | Alan D. SobelDirector | Buy | 1,9009,287 held (+26%) | $6.12 | $12K | -38.1% | — |
| Sep 16SEC | Vincent CapponiCOO, President | Buy | 1,80040,114 held (+5%) | $6.07 | $11K | -37.6% | — |
| Sep 16SEC | Alan D. SobelDirector | Buy | 5009,787 held (+5%) | $6.05 | $3K | -37.4% | — |
| Sep 16SEC | Vincent CapponiCOO, President | Buy | 27340,387 held (+1%) | $5.90 | $2K | -35.8% | — |
| Sep 16SEC | Alan D. SobelDirector | Buy | 1009,887 held (+1%) | $6.01 | $601 | -36.9% | — |
| Sep 9SEC | Phillip P. ChanCEO | Buy | 200,0001,944,432 held (+11%) | $0.35 | $70K | +982.9% | — |
| Jun 16SEC | Peter J MarianiCFO | Buy | 100,000638,113 held (+19%) | $0.44 | $44K | +761.4% | — |
| Jun 15SEC | Phillip P. ChanCEO | Buy | 251,1361,734,099 held (+17%) | $0.40 | $100K | +847.5% | — |
| Jun 15SEC | Phillip P. ChanCEO | Buy | 10,3331,744,432 held (+1%) | $0.43 | $4K | +781.4% | — |
Insiders at Cytosorbents Corp
| Insider | Bought | Sold | Last filing | Score |
|---|---|---|---|---|
| Phillip P. ChanCEO | $198K | — | Sep 16, 2026 | — |
| Peter J MarianiCFO | $44K | — | Jun 16, 2026 | — |
| Alan D. SobelDirector | $15K | — | Sep 16, 2026 | — |
| Vincent CapponiCOO, President | $13K | — | Sep 16, 2026 | — |
Insider activity at other Health Care companies
Same sector, ranked by insider buying in the last 90 days.
CTSO stock: common questions
Are Cytosorbents Corp insiders buying CTSO stock?
In the past 12 months, 4 insiders reported open-market purchases of CTSO worth $260K. The latest was CEO Phillip P. Chan bought $23K of CTSO at $6.00.
Are Cytosorbents Corp insiders selling CTSO stock?
0 insiders reported sales worth $0 over the same period.
Where does this data come from?
Every transaction comes from Form 4 filings that insiders must submit to the SEC within two business days of a trade. We pull them from SEC EDGAR every night.
What is CTSO's 52-week range?
Over the past year CTSO has traded between $3.73 and $18.64. It last closed at $3.79 on Oct 9, 2026.