SEC Form 4 · accession 0001104659-26-074291
Cytosorbents Corp · CTSO
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Peter J Mariani
Officer — Chief Financial Officer
Period of report
Jun 15, 2026
Accepted (ET)
Jun 16, 2026 · 7:00 am EDT
Rule 10b5-1 plan
box not checked
Issuer CIK
0001175151
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common StockF1,F2,F3,F4,F5 | Jun 15, 2026 | P | 100,000 | $0.44 | A | 638,113 | D |
Table II — derivative securities
No Table II lines on this filing.
Explanation of responses
- F1The transaction reported on this Form 4 reflects an open market purchase made by the Reporting Person. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $0.40 to $0.45, inclusive. The Reporting Person undertakes to provide to CytoSorbents Corporation (the "Issuer"), any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in this footnote (1) to this Form 4.
- F2Includes (a) 110,000 restricted stock units ("RSUs"), which will be settled into the Issuer's common stock, par value $0.001 per share (the "Common Stock"), upon vesting upon the earlier of (i) a "Change In Control" of the Issuer, as defined in the Reporting Person's employment agreement (the "Employment Agreement"), or (ii) the fourth anniversary from the date of grant, or August 14, 2028, subject to the Reporting Person's continued service as of the applicable vesting date;
- F3(continued from footnote 2) (b) 65,000 RSUs, of which 32,500 remain unvested as of the date hereof, and which shall vest as to one-half of the award on each of the first and second anniversaries of the date of grant, subject to the Reporting Person's continued service as of the applicable vesting date and will be settled into Common Stock upon vesting;
- F4(continued from footnote 3) (c) 175,000 RSUs, which will be settled into Common Stock upon a "Change In Control" of the Issuer, as defined in the Reporting Person's Employment Agreement, subject to the Reporting Person's continued service as of the applicable vesting date; (d) 71,500 RSUs, which shall vest as to one-half of the award on each of the first and second anniversaries of the date of grant, subject to the Reporting Person's continued service as of the applicable vesting date and will be settled into Common Stock upon vesting; and
- F5(continued from footnote 4) (e) 216,613 shares of Common Stock owned by the Reporting Person.