Sec Form 4 Filing - HOUDESHELL DAVID D @ SEACOAST BANKING CORP OF FLORIDA - 2016-12-30

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 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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1. Name and Address of Reporting Person HOUDESHELL DAVID D 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) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) EVP & Chief Risk Officer (Last) (First) (Middle) P. O. BOX 9012 3. Date of Earliest Transaction (MM/DD/YY) 12/30/2016 (Street) STUART, FL34995 4. If Amendment, Date Original Filed (MM/DD/YY) 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 Common Stock 12/30/2016 F 2,438 D $ 22.06 17,829 D ( 1 ) Common Stock 11,537 D

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 Commonn Stock Right to Buy ( 2 ) $ 14.82 ( 3 ) 02/28/2024 Common Stock 13,225 13,225 D Common Stock Right to Buy ( 2 ) $ 12.63 ( 4 ) 01/28/2023 Common Stock 6,475 6,475 D Common Stock Right to Buy ( 2 ) $ 10.54 04/29/2015( 5 ) 04/29/2024 Common Stock 25,000 25,000 D Common Stock Right to Buy ( 2 ) $ 11 06/28/2014( 6 ) 06/27/2023 Common Stock 4,200 4,200 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other HOUDESHELL DAVID D P. O. BOX 9012 STUART, FL34995 EVP & Chief Risk Officer Signatures /s/ Sharon Mehl as Power of Attorney for David Houdeshell 01/04/2017 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Represents shares subject to performance-based restricted stock units ("PSUs") granted on June 28, 2013, that were subject to performance requirements which were attained over a period ending December 31, 2015. One-third of the earned shares vested on Dec. 31, 2016. Of the remaining shares, half vest on each of Dec. 31, 2017 and 2018, provided the recipient remains in continuous service with the Company on each such vesting date. ( 2 )Granted pursuant to Seacoast Banking Corporation of Florida's 2013 Incentive Plan ( 3 )Originally had two tiered vesting. Performance criteria was met and time-based vesting began on 12/1/2016. Option vests in equal installments at the end of each month over the next 48 months, provided that Optionee remains in Continuous Service on each applicable vesting date. ( 4 )Originally had two tiered vesting. Performance criteria was met and time-based vesting began on 7/1/15. Option vests in equal installments at the end of each month over the next 48 months, provided that Optionee remains in Continuous Service on each applicable vesting date. ( 5 )Vests over 3 years in one-third increments each anniversary of the date of grant beginning on the first anniversary of the date of grant (the date indicated), subject to continued employment. ( 6 )Vests over 5 years at the rate of 20% on the first anniversary of the date of grant (06/28/2014) and then at the rate of 20% on each of the following four anniversaries thereafter, subject to continue employment.

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