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Cytosorbents Corp

CTSO
Exchange
Nasdaq
Industry
Surgical & Medical Instruments & Apparatus
SEC CIK
0001175151

In the last 90 days, Cytosorbents Corp insiders filed 4 open-market purchases and 0 sales; 50 institutions reported holding it in 13F filings for Q2 2026, worth $6.04M in total; no superinvestor holds it.

Open-market trades, last 90 days

Open-market purchases (P) and sales (S) by Cytosorbents Corp insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.

Open-market buys
4 filings
3 insiders, $120.4K in total
Open-market sells
0 filings
Insiders trading
3
Net value
+$120.4K
Purchases minus sales

Insider roster

Directors, officers and 10% owners who have filed a Form 4 for Cytosorbents Corp, current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.

Insider roster for Cytosorbents Corp
NameTitleLast reported holdingLast filingFilings, past year
Chan Phillip P.Chief Executive Officer100,996Sep 16, 20264
Capponi VincentPresident and COO40,387Sep 16, 20261
Sobel Alan D.Director9,887Sep 16, 20261
Mariani Peter JChief Financial Officer638,113Jun 16, 20261
Jones Edward RaymondDirector88,834Aug 8, 20250
Bator Michael G.Director151,273Aug 8, 20250
Deliargyris EfthymiosChief Medical Officer473,025Aug 8, 20250
Kim JinyDirector77,819Aug 8, 20250
Bloch Kathleen P.Chief Financial Officer532,941Apr 4, 20240
Kraus AlDirector142,046Feb 8, 20230

Insider trades

Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.

Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Sep 16, 2026 (view filing)5:30 PM ETSep 151 dayChan Phillip P.Chief Executive OfficerPPurchase+3.77K$6.00+$22.6K+3.9%101.0K after
Sep 16, 2026 (view filing)4:05 PM ETSep 142 daysCapponi VincentPresident and COOPPurchase+2.07K$6.05+$12.5K+5.4%40.4K after2 lots
Sep 16, 2026 (view filing)4:05 PM ETSep 151 daySobel Alan D.DirectorPPurchase+2.50K$6.10+$15.3K+33.8%9.89K after3 lots
Sep 9, 2026 (view filing)4:05 PM ETSep 45 daysChan Phillip P.Chief Executive OfficerPPurchase+200.0K$0.35+$70.0K+11.5%1.94M after
Jun 16, 2026 (view filing)7:00 AM ETJun 151 dayMariani Peter JChief Financial OfficerPPurchase+100.0K$0.44+$44.0K+18.6%638.1K after
Jun 15, 2026 (view filing)6:24 PM ETJun 12-153 daysChan Phillip P.Chief Executive OfficerPPurchase+261.5K$0.4012+$104.9K+17.6%1.74M after2 lots
Dec 16, 2024 (view filing)Dec 133 daysMariani Peter JChief Financial OfficerPPurchase+20.0K$0.96+$19.2K+5.2%401.4K after
Dec 13, 2024 (view filing)Dec 11-122 daysMariani Peter JChief Financial OfficerPPurchase+31.4K$0.89+$27.9K+9.0%381.4K after2 lots
Dec 15, 2023 (view filing)Dec 132 daysSobel Alan D.DirectorPPurchase+22.6K$1.33+$30.0K+28.4%101.9K after
Dec 15, 2023 (view filing)Dec 132 daysSobel Alan D.DirectorPPurchase+7.89K–––7.89K afterDerivative
Dec 15, 2023 (view filing)Dec 132 daysDeliargyris EfthymiosChief Medical OfficerPPurchase+22.6K$1.33+$30.0K+6.9%348.4K after
Dec 15, 2023 (view filing)Dec 132 daysDeliargyris EfthymiosChief Medical OfficerPPurchase+7.89K–––7.89K afterDerivative
Dec 15, 2023 (view filing)Dec 132 daysCapponi VincentPresident & COOPPurchase+18.8K$1.33+$25.0K+3.3%584.1K after
Dec 15, 2023 (view filing)Dec 132 daysCapponi VincentPresident & COOPPurchase+6.58K–––6.58K afterDerivative
Dec 15, 2023 (view filing)Dec 132 daysBator Michael G.DirectorPPurchase+37.6K$1.33+$50.0K+42.8%125.4K after
Dec 15, 2023 (view filing)Dec 132 daysBator Michael G.DirectorPPurchase+13.2K–––13.2K afterDerivative
Dec 15, 2023 (view filing)Dec 132 daysJones Edward RaymondDirectorPPurchase+7.52K$1.33+$10.0K+9.2%88.8K after
Dec 15, 2023 (view filing)Dec 132 daysJones Edward RaymondDirectorPPurchase+2.63K–––2.63K afterDerivative
Dec 15, 2023 (view filing)Dec 132 daysBloch Kathleen P.Chief Financial OfficerPPurchase+37.6K$1.33+$50.0K+8.7%467.9K after
Dec 15, 2023 (view filing)Dec 132 daysBloch Kathleen P.Chief Financial OfficerPPurchase+13.2K–––13.2K afterDerivative
Dec 15, 2023 (view filing)Dec 132 daysKim JinyDirectorPPurchase+7.52K$1.33+$10.0K+10.7%77.8K after
Dec 15, 2023 (view filing)Dec 132 daysKim JinyDirectorPPurchase+2.63K–––2.63K afterDerivative
Dec 15, 2023 (view filing)Dec 132 daysChan Phillip P.Chief Executive OfficerPPurchase+75.2K$1.33+$100.0K+7.6%1.07M after
Dec 15, 2023 (view filing)Dec 132 daysChan Phillip P.Chief Executive OfficerPPurchase+26.3K–––26.3K afterDerivative
Aug 8, 2023 (view filing)Aug 4-74 daysBator Michael G.DirectorPPurchase+3.00K$3.19+$9.58K+3.5%87.8K after3 lots
May 30, 2023 (view filing)May 255 daysBloch Kathleen P.Interim CFOPPurchase+3.30K$2.85+$9.39K+7.6%47.0K after3 lots
May 12, 2023 (view filing)May 102 daysBloch Kathleen P.Interim CFOPPurchase+10.0K$3.11+$31.1K+29.7%43.7K after3 lots
Dec 9, 2022 (view filing)Dec 81 dayChan Phillip P.Chief Executive OfficerPPurchase+5.86K$1.26+$7.38K+0.7%897.3K after
Dec 8, 2022 (view filing)Dec 6-72 daysChan Phillip P.Chief Executive OfficerPPurchase+24.1K$1.26+$30.4K+2.8%891.4K after2 lots
Sep 12, 2022 (view filing)Sep 84 daysChan Phillip P.Chief Executive OfficerPPurchase+35.0K$1.70+$59.5K+4.2%867.3K after
Aug 26, 2022 (view filing)4:32 PM ETAug 251 dayKim JinyDirectorPPurchase+1.00K$1.91+$1.91K+1.4%70.3K after
Jun 22, 2022 (view filing)Jun 211 dayCapponi VincentPresident and COOPPurchase+2.00K$1.80+$3.60K+0.5%443.5K after
Jun 21, 2022 (view filing)Jun 165 daysCapponi VincentSee RemarksPPurchase+3.00K$2.00+$6.00K+0.7%441.5K after
Jun 21, 2022 (view filing)Jun 165 daysChan Phillip P.Chief Executive OfficerPPurchase+2.22K$1.85+$4.11K+0.3%768.4K after
Jun 10, 2022 (view filing)Jun 91 dayChan Phillip P.Chief Executive OfficerPPurchase+16.0K$2.17+$34.7K+2.1%766.1K after
Jun 6, 2022 (view filing)Jun 6Same dayBloch Kathleen P.Chief Financial OfficerPPurchase+8.70K$1.90+$16.5K+34.8%33.7K after
May 25, 2022 (view filing)May 232 daysCapponi VincentPresident and COOPPurchase+5.00K$2.03+$10.2K+1.2%438.5K after3 lots
May 19, 2022 (view filing)May 181 dayBator Michael G.DirectorPPurchase+11.0K$2.19+$24.1K+14.9%84.8K after6 lots
May 17, 2022 (view filing)May 161 dayJones Edward RaymondDirectorPPurchase+1.68K$2.24+$3.75K+2.1%81.3K after
May 12, 2022 (view filing)May 111 daySobel Alan D.DirectorPPurchase+10.0K$2.02+$20.2K+14.4%79.3K after2 lots
May 9, 2022 (view filing)May 63 daysKraus AlDirectorPPurchase+5.00K$1.96+$9.80K+4.0%130.0K after
Jan 3, 2022 (view filing)Dec 29-30, 20215 daysChan Phillip P.Chief Executive OfficerPPurchase+15.0K$4.05+$60.7K+2.0%768.4K after3 lots
Dec 13, 2021 (view filing)Dec 103 daysChan Phillip P.Chief Executive OfficerPPurchase+5.00K$5.25+$26.3K+0.7%753.4K after
Nov 26, 2021 (view filing)Nov 233 daysBloch Kathleen P.Chief Financial OfficerPPurchase+4.00K$4.98+$19.9K+19.0%25.0K after
Sep 2, 2021 (view filing)Aug 312 daysKraus AlDirectorSSale−4.00K$9.40−$37.6K−3.1%125.0K after