Ownership Submission
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 OF SECURITIES

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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(Print or Type Responses)
1. Name and Address of Reporting Person *
Weksel Michael E
   2. Issuer Name and Ticker or Trading Symbol
Alyst Acquisition Corp. [AYA] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
COO, CFO, Secretary
(Last)
(First)
(Middle)
C/O ALYST ACQUISITION CORP., 233 E. 69TH STREET, #6J		 3. Date of Earliest Transaction (Month/Day/Year)
04/09/2009
(Street)

NEW YORK, NY 10021		 4. If Amendment, Date 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
(City)
(State)
(Zip)
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

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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 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
Warrants/Put Option (right to sell) (1) $ 5 04/09/2009   A   559,794   06/30/2009 08/30/2009 Common Stock 559,794 $ 0.0446 227,500 D  
Warrants/Call Option (obligation to sell) (2) $ 5 04/09/2009   D   559,794   04/09/2009 08/31/2009 Common Stock 559,794 $ 0.0446 227,500 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Weksel Michael E
C/O ALYST ACQUISITION CORP.
233 E. 69TH STREET, #6J
NEW YORK, NY 10021		   X     COO, CFO, Secretary  

Signatures

 /s/ Michael E. Weksel   04/10/2009
**Signature of Reporting Person Date

Explanation of Responses:

* 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).
(1) Michael E. Weksel entered into a Put-Call Option Agreement with Alyst Acquisition Corp. ("Alyst"), approved by the Alyst Board of Directors and effective as of April 9, 2009 (the "Agreement"), pursuant to which Mr. Weksel may, at his option, at any time after June 29, 2009 and before August 31, 2009 notify Alyst that he intends to deliver all or a portion of such Warrants to Alyst for purchase. These Warrants are not exercisable unless and until a business combination with a target business is consummated.
(2) The Agreement provides that Alyst may, at its option, on or after the date of the Agreement through August 31, 2009, notify Mr. Weksel of its intention to purchase all of the Warrants from Mr. Weksel. These Warrants are not exercisable unless and until a business combination with a target business is consummated.

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