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 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 *
COOPER JEFFREY
   2. Issuer Name and Ticker or Trading Symbol
SUN HYDRAULICS CORP [SNHY] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Engineering Manager
(Last)
(First)
(Middle)
1500 W UNIVERSITY PARKWAY		 3. Date of Earliest Transaction (Month/Day/Year)
12/14/2006
(Street)

SARASOTA, FL 34243		 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
Common Stock 12/14/2006   M   275 A $ 4.726 29,416 D  
Common Stock 12/14/2006   M   1,500 A $ 5.5133 30,916 D  
Common Stock 12/14/2006   M   675 A $ 8.23 31,591 D  
Common Stock 12/14/2006   S   1,225 D $ 21.75 30,366 D  
Common Stock 12/14/2006   S   1,225 D $ 21.50 29,141 D  
Common Stock               1,707 I (1) BY ESOP TRUST

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
Employee Stock Option (Right to Buy) $ 4.726 12/14/2006   M     275   (2) 09/29/2010 Common Stock 275 $ 0 1,225 D  
Employee Stock Option (Right to Buy) $ 5.5133 (3) 12/14/2006   M     1,500 (3)   (4) 05/17/2012 Common Stock 1,500 $ 0 1,500 (3) D  
Employee Stock Option (Right to Buy) $ 8.23 12/14/2006   M     675   (5) 10/15/2011 Common Stock 675 $ 0 675 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
COOPER JEFFREY
1500 W UNIVERSITY PARKWAY
SARASOTA, FL 34243		       Engineering Manager  

Signatures

 Paul R. Lynch, as Attorney-in-Fact for JEFFREY COOPER   01/08/2007
**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) Reflects allocations of shares under the Sun Hydraulics Corporation Employee Stock Ownership Plan.
(2) Exercisable as follows: 1,000 shares on 9/29/04; an additional 1,500 shares on 9/29/05; and an additional 1,500 shares on 9/29/06.
(3) Price and number of securities have been adjusted for the 1 for 2 common stock dividend declared in June 2005, payable on July 15, 2005, to shareholders of record on June 30, 2005. Number of securities includes 1,000 shares issued as a result of the one-for-two stock dividend declared in June 2005.
(4) Exercisable as follows: 1,000 shares on 5/18/03, an additional 1,000 shares on 5/18/04; an additional 1,000 shares on 5/18/05; an additional 1,500 shares on 5/18/06 and an additional 1,500 shares on 5/18/07.
(5) Exercisable as follows: 675 shares on 10/15/05; an additional 675 shares on 10/15/06; and an additional 675 shares on 10/15/07.

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