Sec Form 4/A Filing - Nisswa Acquisition Master Fund Ltd. @ Seanergy Maritime Holdings Corp. - 2009-12-02

FORM 4/A 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

OMB APPROVAL OMB Number: 3235-0287 Expires: November 30, 2011 Estimated average burden hours per response... 0.5

1. Name and Address of Reporting Person Nisswa Acquisition Master Fund Ltd. 2. Issuer Name and Ticker or Trading Symbol Seanergy Maritime Holdings Corp. [ SHIP] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner _____ Officer (give title below) X __ Other (specify below) no longer 10% owners (Last) (First) (Middle) C/O MAPLES CORPORATE SVCS LIMITED, PO BOX 309, UGLAND HOUSE 3. Date of Earliest Transaction (MM/DD/YY) 12/02/2009 (Street) GRAND CAYMAN, E9KY1-1104 4. If Amendment, Date Original Filed (MM/DD/YY) 09/12/2008 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 Warrants $ 6.5 09/24/2008 09/28/2011 Common Stock 0 3,260,012 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Nisswa Acquisition Master Fund Ltd. C/O MAPLES CORPORATE SVCS LIMITED PO BOX 309, UGLAND HOUSE GRAND CAYMAN, E9KY1-1104 no longer 10% owners Signatures Nisswa Acquisition Master Fund Ltd., By: Pine River Capital Management L.P., its Investment Manager, By: Pine River Capital Management LLC, its General Partner, By: Brian Taylor 12/21/2009 Signature of Reporting Person Date

Explanation of Responses:

Remarks: According to the Form 6-K filed by the Issuer on December 3, 2009, it had issued 4,308,075 shares of its common stock pursuant to the earn-outprovision contained in the acquisition agreement associated with the Issuer's 2008 business combination. As of that date, the Reporting Person nolonger had reporting obligations under Section 16. The Reporting Person met all of its filing oblgiations under Section 16 and the "Date of EarliestTransaction" referenced hereinabove is the date of the Form 6-K referred to in this response. This Form 4 is being filed, not due to a statutoryrequirement, but rather as notice that the Reporting Person is no longer subject to Section 16 with respect to the Issuer, since it is not currently a10% owner.

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.