Sec Form 4 Filing - Bellano John @ GenMark Diagnostics, Inc. - 2010-06-03

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 Bellano John 2. Issuer Name and Ticker or Trading Symbol GenMark Diagnostics, Inc. [ GNMK] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) SR. VP, Commercial Operations (Last) (First) (Middle) 757 S. RAYMOND AVENUE 3. Date of Earliest Transaction (MM/DD/YY) 06/03/2010 (Street) PASADENA, CA91105 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 Common Stock 06/03/2010 P 8,333 A $ 6 8,333 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 (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) $ 6.49 06/03/2010 J( 1 ) 85,224 ( 2 ) 12/23/2019 Common Stock 85,224 $ 0 85,224 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Bellano John 757 S. RAYMOND AVENUE PASADENA, CA91105 SR. VP, Commercial Operations Signatures /s/ Steven Kemper, Attorney-in-Fact 06/03/2010 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Received in exchange for options to purchase ordinary shares of Osmetech plc in connection with the reorganization of GenMark Diagnostics, Inc. The reorganization resulted in GenMark becoming the parent company of Osmetech, GenMark's parent company prior to the reorganization, through a scheme of arrangement under Part 26 of the U.K. Companies Act of 2006, but did not alter the proportionate interests of security holders. The number of options issuable pursuant to the reorganization was determined pursuant to an exchange ratio of 230 options to purchase ordinary shares of Osmetech for an option to purchase one share of GenMark common stock. ( 2 )25% of the option shares vest and become exercisable on December 23, 2010 and the remaining option shares vest and become exercisable in 36 equal monthly installments thereafter.

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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