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
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

Rubio Samuel R
2. Issuer Name and Ticker or Trading Symbol

GULFMARK OFFSHORE INC [ GLF ]
5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director                      _____ 10% Owner
__ X __ Officer (give title below)      _____ Other (specify below)
Senior VP and CFO
(Last)          (First)          (Middle)

842 W. SAM HOUSTON PARKWAY N., STE 400
3. Date of Earliest Transaction (MM/DD/YYYY)

11/15/2018
(Street)

HOUSTON, TX 77024
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
6. Individual or Joint/Group Filing (Check Applicable Line)

_ X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. 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   11/15/2018     D    196   D   (1) 9483   D    
Common Stock   11/15/2018     D    9483   (2) D   (2) 0   D    

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. 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 7. Title and Amount of Securities Underlying Derivative Security
(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 (Right to Buy)   $100   11/15/2018     D         2115    11/14/2017   11/14/2024   Common Stock   2115     (3) 0   D    

Explanation of Responses:
(1)  Each share of common stock was disposed of pursuant to the Agreement and Plan of Merger (the "Merger Agreement"), dated as of July 15, 2018, between Tidewater Inc. ("Tidewater") and the Issuer, in exchange for (1) 1.100 shares of common stock of Tidewater and (2) any applicable cash in lieu of fractional shares of common stock of Tidewater.
(2)  As previously reported, the reporting person received a grant of restricted stock units representing a contingent right to receive the equivalent number of shares of common stock of the Issuer for no consideration that vest in one-third increments on each of the first three anniversaries of April 13, 2018. On November 15, 2018, each restricted stock unit was disposed of pursuant to the Merger Agreement in exchange for restricted stock units of Tidewater representing a contingent right to receive 1.100 shares of common stock of Tidewater on substantially similar terms, as described in more detail in the Merger Agreement.
(3)  The warrants were assumed by Tidewater pursuant to the Merger Agreement and converted automatically into a warrant representing a right to acquire shares of common stock of Tidewater on substantially the same terms, as described in more detail in the Merger Agreement.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
Rubio Samuel R
842 W. SAM HOUSTON PARKWAY N.
STE 400
HOUSTON, TX 77024


Senior VP and CFO

Signatures
/s/ Samuel R. Rubio 11/15/2018
** Signature of Reporting Person Date


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 control number.
Gulfmark Offshore, Inc. (delisted) (AMEX:GLF)
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