Peter J. Mariani - 08 Aug 2025 Form 4 Insider Report for Cytosorbents Corp (CTSO)

Role: Chief Financial Officer
Signature: /s/ Peter J. Mariani
Issuer symbol: CTSO
Transactions as of: 08 Aug 2025
Net transactions value: $0
Form type: 4
Filing time: 08 Aug 2025, 19:37:21 UTC
Previous filing: 26 Feb 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
MARIANI PETER J	Chief Financial Officer	C/O CYTOSORBENTS CORPORATION, 305 COLLEGE ROAD EAST, PRINCETON	/s/ Peter J. Mariani	08 Aug 2025	0001222357

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	CTSO	Common Stock	Award	$0	+71,500	+15%	$0.000000	538,113	08 Aug 2025	Direct	F1, F2, F3, F4, F5

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	CTSO	Stock Option (Right to Buy)	Award	$0	+90,000		$0.000000	90,000	08 Aug 2025	Common Stock	90,000	$1.00	Direct	F6

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	These shares represent restricted stock units ("RSUs") which shall vest in equal parts at the first and second year anniversaries of the date of grant, subject to the reporting person's continued service as of the applicable vesting date.
F2	Includes (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, 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; and
F5	(continued from footnote 4) (d) 116,613 shares of Common Stock owned by the Reporting Person.
F6	These stock options were granted pursuant to the Plan. The shares underlying these stock options vest as to one-half of the award on the first year anniversary of the date of grant, one-fourth of the award on the second year anniversary of the date of grant, and one-fourth of the award on the third year anniversary of the date of grant, subject to the reporting person's continued service as of the applicable vesting date.