[Form 4] Cytosorbents Corp. Insider Trading Activity

Rhea-AI Filing Summary

Efthymios Deliargyris, Chief Medical Officer of Cytosorbents Corporation (CTSO), was granted equity awards on 08/08/2025. The filing reports an award of 70,000 restricted stock units (RSUs) that vest in equal parts on the first and second anniversaries of the grant, and a grant of 95,000 stock options with an exercise price of $1 that vest one-half on the first anniversary, one-fourth on the second and one-fourth on the third anniversary of the grant.

The disclosure shows these RSUs will settle into common stock upon vesting and notes certain RSUs that vest on a Change In Control (120,000 and 55,000 RSUs). Following the reported transactions, the reporting person beneficially owns 473,025 shares (direct). All information is taken from the Form 4 filing text.

Insights

Securities Analyst

TL;DR: Officer received routine compensation awards: 70,000 RSUs and 95,000 options at $1; total beneficial ownership now 473,025 shares.

The Form 4 documents compensation-related equity grants to the Chief Medical Officer on 08/08/2025: 70,000 RSUs vesting over two years and 95,000 options with a $1 exercise price and a three-step vesting schedule. The filing also itemizes previously granted RSUs that may vest on a change in control and discloses 197,525 currently owned shares as part of the 473,025 total. The filing is a standard insider compensation disclosure; the document does not provide outstanding share count or market context to assess dilution.

Corporate Governance Expert

TL;DR: Grants follow plan terms with service-based vesting and change-in-control provisions; disclosure is consistent with routine executive compensation reporting.

The Form 4 explicitly describes service-vested RSUs and time-based stock options granted under the company's long-term incentive plan, including specific vesting schedules and change-in-control settlement language for certain prior RSUs. These are compensation mechanics disclosed as required; the filing does not include information on total dilution, grant rationale, or performance conditions beyond the stated vesting terms.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Deliargyris Efthymios

(Last) (First) (Middle)

C/O CYTOSORBENTS CORPORATION

305 COLLEGE ROAD EAST

(Street)

PRINCETON NJ 08540

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Cytosorbents Corp [ CTSO ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Medical Officer

3. Date of Earliest Transaction (Month/Day/Year)
08/08/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	08/08/2025		A		70,000(1)	A	$0	473,025(2)(3)(4)	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option (Right to Buy)	$1	08/08/2025		A		95,000		(5)	08/08/2035	Common Stock	95,000	$0	95,000	D

Explanation of Responses:

1. 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.

2. Includes: (ii) the following RSUs that will be settled into Common Stock upon vesting upon a "Change In Control" of the Company as defined in the Amended and Restated CytoSorbents Corporation 2014 Long-Term Incentive Plan (the "Plan"): (a) 120,000 RSUs granted on April 9, 2020 and (b) 55,000 RSUs granted on August 10, 2022;

3. (continued from footnote 2) (iii) the following RSUs, which vest in equal parts on the first year anniversary of the date of grant and the second year anniversary of the date of grant, subject to the reporting person's continued service as of the applicable vesting date, and will settle into shares of Common Stock of the Company upon vesting: 61,000 RSUs granted on April 2, 2024 and of which 30,500 remain unvested as of the date hereof; and

4. (continued from footnote 3) (iv) 197,525 shares of Common Stock owned by the reporting person.

5. 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.

Remarks:

Exhibit 24.1 Power of Attorney

	/s/ Peter J. Mariani attorney-in-fact Efthymios Deliargyris	08/08/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transactions does the CTSO Form 4 report?

The Form 4 reports that CMO Efthymios Deliargyris was granted 70,000 RSUs and 95,000 stock options on 08/08/2025.

What are the vesting terms for the 70,000 RSUs reported for CTSO?

The 70,000 RSUs vest in equal parts on the first and second anniversaries of the grant, subject to continued service.

What are the terms of the 95,000 stock options in the CTSO filing?

The options have an exercise price of $1 and vest as to one-half on the first anniversary, one-fourth on the second anniversary and one-fourth on the third anniversary of the grant.

How many CTSO shares does the reporting person beneficially own after these transactions?

Following the reported transactions the filing states the reporting person beneficially owns 473,025 shares (direct).

Are there any change-in-control provisions noted in the CTSO Form 4?

Yes. The filing discloses RSUs that will settle upon a Change In Control, specifically 120,000 RSUs granted April 9, 2020 and 55,000 RSUs granted August 10, 2022.