Ownership Submission
FORM 3
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF 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
OMB APPROVAL
OMB Number: 3235-0104
Expires: January 31, 2005
Estimated average burden hours per response... 0.5

(Print or Type Responses)
1. Name and Address of Reporting Person *
  TIDEWATER INC
2. Date of Event Requiring Statement (Month/Day/Year)
07/15/2018
3. Issuer Name and Ticker or Trading Symbol
GULFMARK OFFSHORE INC [GLF]
(Last)
(First)
(Middle)
6002 ROGERDALE ROAD, SUITE 600
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

HOUSTON, TX 77072
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 Beneficially Owned
1.Title of Security
(Instr. 4)
2. Amount of Securities Beneficially Owned
(Instr. 4)
3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)
4. Nature of Indirect Beneficial Ownership
(Instr. 5)
No securities beneficially owned 0
D (1) (2) (3)
 

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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.

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)
2. Date Exercisable and Expiration Date
(Month/Day/Year)
3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)
4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)
6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
TIDEWATER INC
6002 ROGERDALE ROAD
SUITE 600
HOUSTON, TX 77072
    X    

Signatures

/s/ Bruce D. Lundstrom, EVP & General Counsel, Tidewater Inc. 07/25/2018
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(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) On July 15, 2018, Tidewater Inc. ("Tidewater") entered into an Agreement and Plan of Merger (the "Merger Agreement") with GulfMark Offshore, Inc. ("GulfMark"), which, among other things, contemplates the acquisition by Tidewater of the entire equity interest in GulfMark, including all shares of its common stock, $0.01 par value per share (the "GulfMark Common Stock").
(2) Concurrently with execution of the Merger Agreement, each of Raging Capital Management, LLC ("Raging") and 5 Essex, L.P. ("5 Essex" and, together with Raging, the "GulfMark Supporting Stockholders"), entered into a voting and support agreement with Tidewater (together, the "Voting Agreements"), pursuant to which the GulfMark Supporting Stockholders have agreed, among other things and subject to the terms and conditions of the Voting Agreements, to vote 1,709,464 shares of GulfMark Common Stock, in the case of Raging, and 914,882 shares of GulfMark Common Stock, in the case of 5 Essex (in the aggregate, the "Covered Shares"), beneficially owned by each, respectively, in favor of the adoption of the Merger Agreement and the approval of all transactions contemplated by the Merger Agreement (together, the "Transactions").
(3) Tidewater does not have any pecuniary interest in the Covered Shares, any other shares of GulfMark Common Stock, or any other GulfMark securities. The purpose of the Voting Agreements is to facilitate the adoption of the Merger Agreement and approval of the Transactions by the stockholders of GulfMark. Through its execution of the Voting Agreements, Tidewater may be deemed to have acquired shared voting power with respect to the Covered Shares. However, the filing of this Initial Statement of Beneficial Ownership of Securities on Form 3 shall not be construed as an admission by Tidewater that it is the beneficial owner of any shares of GulfMark Common Stock for purposes of Section 13(d), 13(g) or 16 of the Securities Exchange Act of 1934, as amended.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, See Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.