Sec Form 4 Filing - BLOCH KATHLEEN P. @ Cytosorbents Corp - 2017-01-30

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

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, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person BLOCH KATHLEEN P. 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 Financial Officer (Last) (First) (Middle) C/O CYTOSORBENTS CORPORATION, 7 DEER PARK DRIVE, SUITE K 3. Date of Earliest Transaction (MM/DD/YY) 01/30/2017 (Street) MONMOUTH JUNCTION, NJ08852 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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

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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 7. Title and Amount of Underlying Securities (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 of Derivative Security: 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) $ 4.69 01/30/2017 A 62,000 ( 1 ) 06/07/2026 Common Stock 62,000 $ 0 62,000 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other BLOCH KATHLEEN P. C/O CYTOSORBENTS CORPORATION 7 DEER PARK DRIVE, SUITE K MONMOUTH JUNCTION, NJ08852 Chief Financial Officer Signatures /s/ Kathleen P. Bloch 02/01/2017 Signature of Reporting Person Date

Explanation of Responses:

( 1 )On June 7, 2016, the reporting person was granted an option to purchase 77,500 shares of common stock pursuant to the CytoSorbents Corporation 2014 Long-Term Incentive Plan, which was to vest upon achievement of certain performance goals as determined in the discretion of the Board of Directors of CytoSorbents Corporation (the "Company"). This grant was reported on a Form 4 filed on June 9, 2016. On January 30, 2017, the Board of Directors of the Company determined that 80% of such performance criteria was achieved during 2016, resulting in the vesting of 62,000 shares underlying this option.

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).

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