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 *
Nealis Melanie M
   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)
Chief Legal & Compliance Offic
(Last)
(First)
(Middle)
1500 WEST UNIVERSITY PARKWAY		 3. Date of Earliest Transaction (Month/Day/Year)
02/22/2019
(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

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
Performance-Based Restricted Stock Units $ 0 (1) 02/22/2019   A   4,117     (2)   (2) Common Stock 4,117 $ 0 4,117 D  
Restricted Stock Units $ 0 (3) 02/22/2019   A   4,117     (4)   (4) Common Stock 4,117 $ 0 4,117 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Nealis Melanie M
1500 WEST UNIVERSITY PARKWAY
SARASOTA, FL 34243		       Chief Legal & Compliance Offic  

Signatures

 Gregory C. Yadley, as Attorney-in-Fact for Melanie M. Nealis   02/26/2019
**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) Each performance-based Restricted Stock Unit (RSU) represents the right to receive, following vesting, up to 150% of one share of Sun Hydraulics common stock (Common Stock). The number of shares of Common Stock acquired upon vesting of the performance-based RSUs is contingent upon the achievement of pre-established performance metrics, as approved by the Company's Compensation Committee, over a three-year performance period beginning on the first day of the Company's fiscal year ending December 28, 2019 and ending on the last day of the Company's fiscal year ending January 1, 2022.
(2) Unless earlier forfeited under the terms of the performance-based RSU, each performance-based RSU vests and converts into no more than 150% of one share of Common Stock after the determination of the achievement of the performance goals during the three-year performance period ending on the last day of the Company's fiscal year ending January 1, 2022.
(3) Each RSU represents the right to receive, following vesting, one share of Common Stock.
(4) Unless earlier forfeited under the terms of the RSU, 33-1/3% of the awards vest and convert into Common Stock on each anniversary of the grant date.

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