Sec Form 4 Filing - MARSHALL FRANK @ INFOBLOX INC - 2013-03-01

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 MARSHALL FRANK 2. Issuer Name and Ticker or Trading Symbol INFOBLOX INC [ BLOX] 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) C/O INFOBLOX INC., 4750 PATRICK HENRY DR 3. Date of Earliest Transaction (MM/DD/YY) 03/01/2013 (Street) SANTA CLARA, CA95054 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 03/01/2013 J( 1 ) 1,538 A 4,614 I By Timark LP ( 3 ) Common Stock 03/04/2013 J( 4 ) 1,537 A 6,151 I By Timark LP ( 3 ) Common Stock 03/05/2013 J( 5 ) 2,050 A 8,201 I By Timark LP ( 3 ) Common Stock 03/06/2013 J( 6 ) 2,046 A 10,247 I By Timark LP ( 3 ) Common Stock 03/05/2013 S 20,000 D $ 21.39 33,089 I By Big Basin Partners LP ( 7 ) Common Stock 03/05/2013 S 5,000 D $ 21.4 7,766 I By trust ( 8 )

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

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other MARSHALL FRANK C/O INFOBLOX INC. 4750 PATRICK HENRY DR SANTA CLARA, CA95054 X Signatures Frank J. Marshall, by Robert Horton, his Attorney-in-Fact 03/07/2013 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Represents the receipt of shares of Common Stock of the Issuer by virtue of the pro rata in-kind distributions as follows: (i) 65 shares from Sequoia Capital Entrepreneurs Annex Fund, LP; (ii) 432 shares from Sequoia Capital Franchise Partners, LP; and (iii) 1,041 shares from Sequoia Technology Partners X, LP. ( 2 )Represents a pro rata in-kind distribution of Common Stock of the Issuer to partners or members and includes subsequent distributions by general partners or managing members to their respective partners or members. ( 3 )The reporting person is the general partner of this Family Limited Partnership. ( 4 )Represents the receipt of shares of Common Stock of the Issuer by virtue of the pro rata in-kind distributions as follows: (i) 65 shares from Sequoia Capital Entrepreneurs Annex Fund, LP; (ii) 431 shares from Sequoia Capital Franchise Partners, LP; and (iii) 1,041 shares from Sequoia Technology Partners X, LP. ( 5 )Represents the receipt of shares of Common Stock of the Issuer by virtue of the pro rata in-kind distributions as follows: (i) 86 shares from Sequoia Capital Entrepreneurs Annex Fund, LP; (ii) 576 shares from Sequoia Capital Franchise Partners, LP; and (iii) 1,388 shares from Sequoia Technology Partners X, LP. ( 6 )Represents the receipt of shares of Common Stock of the Issuer by virtue of the pro rata in-kind distributions as follows: (i) 87 shares from Sequoia Capital Entrepreneurs Annex Fund, LP; (ii) 573 shares from Sequoia Capital Franchise Partners, LP; and (iii) 1,386 shares from Sequoia Technology Partners X, LP. ( 7 )Shares held of record by Big Basin Partners LP, of which the reporting person serves as a General Partner. The reporting person disclaims beneficial ownership of such securities except to the extent of his pecuniary interest therein, and the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of the reported securities for purposes of Section 16 or for any other purposes. ( 8 )Shares held of record by the Frank and Judith Marshall Living Trust, of which Mr. Marshall serves as trustee.

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).

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