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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1. Name and Address of Reporting Person * STARBOARD LEADERS FUND LP   2. Issuer Name and Ticker or Trading Symbol Mellanox Technologies, Ltd. [MLNX] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 777 THIRD AVENUE, 18TH FLOOR 3. Date of Earliest Transaction (Month/Day/Year) 02/28/2018 (Street) NEW YORK, NY 10017 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) ___ Form filed by One Reporting Person _X_ 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 Ordinary Shares, nominal value NIS 0.0175 per share (1) (2) 02/28/2018   X(9)   460,000 A $ 25 3,758,713 I By Starboard Value and Opportunity Master Fund Ltd (3) Ordinary Shares, nominal value NIS 0.0175 per share (1) (2)               440,135 I By Starboard Value and Opportunity S LLC (4) Ordinary Shares, nominal value NIS 0.0175 per share (1) (2)               247,597 I By Starboard Value and Opportunity C LP (5) Ordinary Shares, nominal value NIS 0.0175 per share (1) (2)               456,609 I By Starboard Leaders Papa LLC (6) (7) Ordinary Shares, nominal value NIS 0.0175 per share (1) (2)               563,567 I By Managed Account of Starboard Value LP (8)

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

Call Option (right to buy) (1) (2)

$ 25

02/28/2018

X(9)

1

02/28/2018

02/28/2018

Ordinary Shares, nominal value NIS 0.0175 per share

460,000

$ 0

0

I

By Starboard Value and Opportunity Master Fund Ltd (3)

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
STARBOARD LEADERS FUND LP 777 THIRD AVENUE, 18TH FLOOR NEW YORK, NY 10017		X
Starboard Value A LP 777 THIRD AVENUE, 18TH FLOOR NEW YORK, NY 10017		X
Starboard Value A GP LLC 777 THIRD AVENUE, 18TH FLOOR NEW YORK, NY 10017		X
Smith Jeffrey C 777 THIRD AVENUE, 18TH FLOOR NEW YORK, NY 10017		X
Feld Peter A 777 THIRD AVENUE, 18TH FLOOR NEW YORK, NY 10017		X
MITCHELL MARK R 777 THIRD AVENUE, 18TH FLOOR NEW YORK, NY 10017		X

Signatures

Starboard Leaders Fund LP; By: Starboard Value A LP; By: /s/ Jeffrey C. Smith, Authorized Signatory		03/02/2018
**Signature of Reporting Person		Date
Starboard Value A LP; By: Starboard Value A GP LLC; By: /s/ Jeffrey C. Smith, Authorized Signatory		03/02/2018
**Signature of Reporting Person		Date
Starboard Value A GP LLC; By: /s/ Jeffrey C. Smith, Authorized Signatory		03/02/2018
**Signature of Reporting Person		Date
By: /s/ Jeffrey C. Smith		03/02/2018
**Signature of Reporting Person		Date
Mark R. Mitchell; By: /s/ Jeffrey C. Smith, Attorney in Fact		03/02/2018
**Signature of Reporting Person		Date
Peter A. Feld; By: /s/ Jeffrey C. Smith, Attorney in Fact		03/02/2018
**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)	This Form 4 is filed jointly by Starboard Value and Opportunity Master Fund Ltd ("Starboard V&O Fund"), Starboard Value and Opportunity S LLC ("Starboard S LLC"), Starboard Value and Opportunity C LP ("Starboard C LP"), Starboard Leaders Papa LLC ("Starboard Papa LLC"), Starboard Value LP ("Starboard Value LP"), Starboard Value GP LLC ("Starboard Value GP"), Starboard Principal Co LP ("Principal Co"), Starboard Principal Co GP LLC ("Principal GP"), Starboard Value R LP ("Starboard R LP"), Starboard Value R GP LLC ("Starboard R GP"), Starboard Leaders Fund LP ("Starboard Leaders Fund"), Starboard Value A LP ("Starboard A LP"), Starboard Value A GP LLC ("Starboard A GP"), Jeffrey C. Smith, Mark R. Mitchell and Peter A. Feld (collectively, the "Reporting Persons").
(2)	To enable all of the Reporting Persons to gain access to the Securities and Exchange Commission's electronic filing system (which only accepts a maximum of 10 joint filers per report), this report is the second of two identical reports relating to the same transactions being filed with the Securities and Exchange Commission. Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding Ordinary Shares. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose.
(3)	Securities beneficially owned by Starboard V&O Fund. Starboard Value LP, as the investment manager of Starboard V&O Fund, may be deemed to be the beneficial owner of the securities beneficially owned by Starboard V&O Fund. Each of Starboard Value GP, as the general partner of Starboard Value LP, Principal Co, as a member of Starboard Value GP, Principal GP, as the general partner of Principal Co, and Messrs. Smith, Mitchell and Feld, as members of Principal GP and as members of each of the Management Committee of Starboard Value GP and the Management Committee of Principal GP, may be deemed to be the beneficial owner of the securities beneficially owned by Starboard V&O Fund.
(4)	Securities beneficially owned by Starboard S LLC. Starboard Value LP, as the manager of Starboard S LLC, may be deemed to be the beneficial owner of the securities beneficially owned by Starboard S LLC. Each of Starboard Value GP, as the general partner of Starboard Value LP, Principal Co, as a member of Starboard Value GP, Principal GP, as the general partner of Principal Co, and Messrs. Smith, Mitchell and Feld, as members of Principal GP and as members of each of the Management Committee of Starboard Value GP and the Management Committee of Principal GP, may be deemed to be the beneficial owner of the securities beneficially owned by Starboard S LLC.
(5)	Securities beneficially owned by Starboard C LP. Each of Starboard R LP, as the general partner of Starboard C LP, and Starboard R GP, as the general partner of Starboard R LP, may be deemed to be the beneficial owner of the securities beneficially owned by Starboard C LP. Starboard Value LP, as the investment manager of Starboard C LP, may be deemed to be the beneficial owner of the securities beneficially owned by Starboard C LP. Each of Starboard Value GP, as the general partner of Starboard Value LP, Principal Co, as a member of Starboard Value GP, Principal GP, as the general partner of Principal Co, and Messrs. Smith, Mitchell and Feld, as members of Principal GP and as members of each of the Management Committee of Starboard Value GP and the Management Committee of Principal GP, may be deemed to be the beneficial owner of the securities beneficially owned by Starboard C LP.
(6)	Securities beneficially owned by Starboard Papa LLC. Starboard Leaders Fund, as a member of Starboard Papa LLC, may be deemed to be the beneficial owner of the securities beneficially owned by Starboard Papa LLC. Each of Starboard A LP, as the general partner of Starboard Leaders Fund, and Starboard A GP, as the general partner of Starboard A LP, may be deemed to be the beneficial owner of the securities beneficially owned by Starboard Papa LLC.
(7)	Starboard Value LP, as the investment manager of Starboard Papa LLC, may be deemed to be the beneficial owner of the securities beneficially owned by Starboard Papa LLC. Each of Starboard Value GP, as the general partner of Starboard Value LP, Principal Co, as a member of Starboard Value GP, Principal GP, as the general partner of Principal Co, and Messrs. Smith, Mitchell and Feld, as members of Principal GP and as members of each of the Management Committee of Starboard Value GP and the Management Committee of Principal GP, may be deemed to be the beneficial owner of the securities beneficially owned by Starboard Papa LLC.
(8)	Securities held in an account managed by Starboard Value LP. Starboard Value GP, as the general partner of Starboard Value LP, Principal Co, as a member of Starboard Value GP, Principal GP, as the general partner of Principal Co, and Messrs. Smith, Mitchell and Feld, as members of Principal GP and as members of each of the Management Committee of Starboard Value GP and the Management Committee of Principal GP, may be deemed to be the beneficial owner of the securities beneficially owned by Starboard Value LP.
(9)	Exercise of European-style call options.

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