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 *
TAN LIP BU
   2. Issuer Name and Ticker or Trading Symbol
AMBARELLA INC [AMBA] 		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)
ONE CALIFORNIA STREET, SUITE 2800		 3. Date of Earliest Transaction (Month/Day/Year)
06/28/2013
(Street)

SAN FRANCISCO, CA 94111		 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
Ordinary Shares 06/28/2013   S   2,550 D $ 16.6064 (1) 8,703 I See Footnote (4)
Ordinary Shares 06/28/2013   S   347 D $ 16.6064 (2) 0 I See Footnote (5)
Ordinary Shares 06/28/2013   S   357 D $ 16.6064 (3) 0 I See Footnote (6)
Ordinary Shares               1,116 I See Footnote (7)
Ordinary Shares               2,260,639 I See Footnote (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

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
TAN LIP BU
ONE CALIFORNIA STREET, SUITE 2800
SAN FRANCISCO, CA 94111		   X      

Signatures

 /s/ Lip-Bu Tan   07/02/2013
**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) The sale price reported in column 4 of Table I represents the weighted average sale price of the shares sold ranging from $16.55 to $16.69 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the reporting person will provide full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (1) to this Form 4.
(2) The sale price reported in column 4 of Table I represents the weighted average sale price of the shares sold ranging from $16.55 to $16.69 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the reporting person will provide full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (2) to this Form 4.
(3) The sale price reported in column 4 of Table I represents the weighted average sale price of the shares sold ranging from $16.55 to $16.69 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the reporting person will provide full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (3) to this Form 4.
(4) Such shares are held by Pacven Walden Management Co., Ltd., of which Mr. Tan is the sole shareholder and director.
(5) Such shares are held by WIIG Pool, Inc., of which Mr. Tan is a director and shareholder. Mr. Tan disclaims beneficial ownership of the shares held by WIIG Pool, Inc. except to the extent of any pecuniary interest therein.
(6) Such shares are held by Reserve Holdings LLC, of which Mr. Tan is a director and shareholder. Mr. Tan disclaims beneficial ownership of the shares held by Reserve Holdings LLC except to the extent of any pecuniary interest therein.
(7) Such shares are held by Lip-Bu Tan & Ysa Loo Trust DTD 2/3/92.
(8) Such shares are held by Pacven Walden Ventures V, L.P. and affiliated funds. Mr. Tan disclaims beneficial ownership of these shares except to the extent of any pecuniary interest therein.

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