Ownership Submission
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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(Print or Type Responses)
1. Name and Address of Reporting Person *
Banahan Thomas
  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 (Month/Day/Year)
04/25/2012
(Street)

SANTA CLARA, CA 95054
4. If Amendment, Date Original Filed(Month/Day/Year)
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 (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
Common Stock 04/25/2012   C   385,610 A (1) 474,100 I By Tenaya Capital IV, L.P. (2)
Common Stock 04/25/2012   C   368,650 A (1) 472,395 I By Tenaya Capital IV-C, L.P. (3)
Common Stock 04/25/2012   C   384,172 A (1) 492,286 I By Tenaya Capital IV-P, L.P. (4)
Common Stock 04/25/2012   C   461,851 A (5) 935,951 I By Tenaya Capital IV, L.P. (2)
Common Soick 04/25/2012   C   624,914 A (5) 1,097,309 I By Tenaya Capital IV-C, L.P. (3)
Common Stock 04/25/2012   C   651,226 A (5) 1,143,512 I By Tenaya Capital IV-P, L.P. (4)

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
Series D Convertible Preferred Stock (1) 04/25/2012   C     1,156,831 (1)   (1)   (1) Common Stock 385,610 $ 0 0 I By Tenaya Capital IV, L.P. (2)
Series D Convertible Preferred Stock (1) 04/25/2012   C     1,105,950 (1)   (1)   (1) Common Stock 368,650 $ 0 0 I By Tenaya Capital IV-C, L.P. (3)
Series D Convertible Preferred Stock (1) 04/25/2012   C     1,152,516 (1)   (1)   (1) Common Stock 384,172 $ 0 0 I By Tenaya Capital IV-P, L.P. (4)
Series E Convertible Preferred Stock (5) 04/25/2012   C     1,385,555 (5)   (5)   (5) Common Stock 461,851 $ 0 0 I By Tenaya Capital IV, L.P. (2)
Series E Convertible Preferred Stock (5) 04/25/2012   C     1,874,744 (5)   (5)   (5) Common Stock 624,914 $ 0 0 I By Tenaya Capital IV-C, L.P. (3)
Series E Convertible Preferred Stock (5) 04/25/2012   C     1,953,680 (5)   (5)   (5) Common Stock 651,226 $ 0 0 I By Tenaya Capital IV-P, L.P. (4)

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Banahan Thomas
C/O INFOBLOX INC.
4750 PATRICK HENRY DR.
SANTA CLARA, CA 95054
  X      

Signatures

 /s/ Robert Horton as attorney-in-fact for Thomas Banahan   04/27/2012
**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) Each share of the issuer's Series D Convertible Preferred Stock automatically converted into 1/3 share of the issuer's Common Stock on April 25, 2012 pursuant to an election by the holders of a majority of the shares of preferred stock of the issuer in connection with the closing of the issuer's sale of its Common Stock in its firm commitment initial underwritten public offering pursuant to a registration statement on Form S-1 under the Securities Act of 1933, as amended, and had no expiration date.
(2) The reporting person is one of the managing members of Tenaya Capital IV Annex GP, LLC, which is the general partner of Tenaya Capital IV, L.P. ("Tenaya Capital IV"), and may be deemed to share voting and dispositive power with respect to the shares held by Tenaya Capital IV. The reporting person disclaims beneficial ownership of such securities held by Tenaya Capital IV except to the extent of his pecuniary interest therein, and the inclusion of these securities in this report shall not be deemed to be an admission of beneficial ownership of the reported securities for purposes of Section 16 or for any other purposes.
(3) The reporting person is one of the managing members of Tenaya Capital IV GP, LLC, which is the general partner of Tenaya Capital IV GP, LP, which is the general partner of Tenaya Capital IV-C, L.P. ("Tenaya Capital IV-C"), and may be deemed to share voting and dispositive power with respect to the shares held by Tenaya Capital IV-C. The reporting person disclaims beneficial ownership of the securities held by Tenaya Capital IV-C except to the extent of his pecuniary interest therein, and the inclusion of these securities in this report shall not be deemed to be an admission of beneficial ownership of the reported securities for purposes of Section 16 or for any other purposes.
(4) The reporting person is one of the managing members of Tenaya Capital IV GP, LLC, which is the general partner of Tenaya Capital IV GP, LP, which is the general partner of Tenaya Capital IV-P, L.P. ("Tenaya Capital IV-P"), and may be deemed to share voting and dispositive power with respect to the shares held by Tenaya Capital IV-P. The reporting person disclaims beneficial ownership of the securities held by Tenaya Capital IV-P except to the extent of his pecuniary interest therein, and the inclusion of these securities in this report shall not be deemed to be an admission of beneficial ownership of the reported securities for purposes of Section 16 or for any other purposes.
(5) Each share of the issuer's Series E Convertible Preferred Stock automatically converted into 1/3 share of the issuer's Common Stock on April 25, 2012 pursuant to an election by the holders of a majority of the shares of preferred stock of the issuer in connection with the closing of the issuer's sale of its Common Stock in its firm commitment underwritten initial public offering pursuant to a registration statement on Form S-1 under the Securities Act of 1933, as amended, and had no expiration date.

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