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 *
ARCZYNSKI DENNIS J
  2. Issuer Name and Ticker or Trading Symbol
SEACOAST BANKING CORP OF FLORIDA [SBCF]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
SEACOAST BANKING CORPORATION OF FLORIDA, P. O. BOX 9012
3. Date of Earliest Transaction (Month/Day/Year)
02/15/2017
(Street)

STUART, FL 34995
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 02/15/2017 02/17/2017 P(1)   1,000 A $ 22.25 1,000 D  
Common Stock               24,475.5 D (2)  
Common Stock               1,672 D (3)  
Common Stock               9,110 D (4)  
Common Stock               3,000 D  

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
Common Stock Right to Buy (5) $ 22.65             02/06/2017 02/05/2027 Common Stock 2,142   22.65 D  
Common Stock Right to Buy (5) $ 14.39             02/03/2016 02/02/2026 Common Stock 3,419   3,419 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
ARCZYNSKI DENNIS J
SEACOAST BANKING CORPORATION OF FLORIDA
P. O. BOX 9012
STUART, FL 34995
  X      

Signatures

 /s/ Sharon Mehl as Power of Attorney for Dennis J. Arczynski   02/17/2017
**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) Shares purchased in a common stock offering, a prospectus supplement on which was filed with the SEC on February 16, 2017 pursuant to the Securities Act of 1933 Rule 424(b)(5).
(2) Held in Seacoast's Non-employee Directors Deferred Compensation Plan for which receipt of such shares has been deferred, and as to which shares Mr. Arczynski has no voting or dispositive power
(3) Held by LLP in which Mr. Arczynski is principal, as to which shares Mr. Arczynski has sole voting and dispositive power.
(4) Held jointly with spouse
(5) Granted pursuant to Seacoast Banking Corporation of Florida's 2013 Incentive Plan

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