Cytosorbents (CTSO)CFO bought ~$44K

~$44K

Approx. value · 100K sh @ $0.44

638K

Holds after · shares reported

Traded

Jun 15, 2026

Filed

Jun 16, 2026

The story around this disclosure

Every dated public record OQRO holds about the company from 60 days before to 120 days after, oldest first. It shows what was going on; none of it is a stated reason for the trade.

1. May 13, 2026Company filing · Form 8-K · ResultsReported its results
2. Jun 12, 2026Insider · First insider buy since Dec 2024CEO purchased ~$100K of CTSO shares in the open market
3. Jun 15, 2026 · this disclosureInsider · 14 days before an 8-KCFO purchased ~$44K of CTSO shares in the open market

What came next

1. Jun 15, 2026Insider · 14 days before an 8-KCEO purchased ~$4.4K of CTSO shares in the open market
2. Jun 29, 2026Company filing · Form 8-K · Listing noticeReceived a notice from its stock exchange“On June 29, 2026, CytoSorbents Corporation, a Delaware corporation (the “Company”), received a written notice (“Notice”) from the Listing Qualifications Department of the Nasdaq Stock Market LLC (“Nasdaq”) that the Company was not in compliance with Nasdaq Listing Rule 5550(b)(2) because the Company’s minimum Market Value of Listed Securities was below the minimum of $35 million required for continued listing on the…”
3. Aug 6, 2026Company filing · Form 8-K · ResultsReported its results
4. Sep 4, 2026InsiderCEO purchased ~$70K of CTSO shares in the open market
5. Sep 8, 2026Company filing · Form 8-K · Bylaws or charterChanged its bylaws, charter or fiscal year
6. Sep 14, 2026Insider · 1 personInsiders: 2 purchases (~$13K)
7. Sep 15, 2026Insider · 2 peopleInsiders: 4 purchases (~$38K)

How to read SEC Form 4

Form 4 is the filing that officers, directors and owners of more than 10% of a US-listed company must send to the SEC within two business days after they buy, sell or otherwise change their holding of the company's stock.

Full guide: What is an SEC Form 4?

What else is on file for Cytosorbents

For Cytosorbents, OQRO holds 7 insider filings (SEC Form 4 or Form 144) dated in the last 90 days.

These are records OQRO holds, counted by their date, not a measure of how much trading took place. Routine paperwork such as option exercises and tax withholding is left out. Everything for the company is on its CTSO page.

Other recent filings by Peter J Mariani, Chief Financial Officer

• SEC Form 4 at Cytosorbents (CTSO)Dec 16, 2024
• SEC Form 4 at Cytosorbents (CTSO)Dec 13, 2024
• SEC Form 4 at Cytosorbents (CTSO)Dec 13, 2024

The full history of Peter J Mariani, Chief Financial Officer is on the profile page.

How this filing works

• SEC Form 4
• Open-market purchase
• Rule 10b5-1 trading plans

Other disclosures at Cytosorbents

• SEC Form 4Sep 16, 2026
• SEC Form 4Sep 16, 2026
• SEC Form 4Sep 16, 2026
• SEC Form 4Sep 16, 2026
• SEC Form 4Sep 16, 2026
• SEC Form 4Sep 16, 2026

Everything OQRO holds on this company is on its CTSO page.