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
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  Kathuria Vijay
 2. Date of Event Requiring Statement (Month/Day/Year)
06/05/2007		 3. Issuer Name and Ticker or Trading Symbol
Starent Networks, Corp. [STAR]
(Last)
(First)
(Middle)
C/O STARENT NETWORKS, CORP., 30 INTERNATIONAL PLACE		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
V.P. & G.M., India
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

TEWKSBURY, MA 01876		 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)
Common Stock 141,666
D
 
Common Stock 133,333
I
See Footnote (1)
Common Stock 11,666
I
See Footnote (2)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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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
Stock Option (Right to Buy)   (3) 01/23/2013 Common Stock 26,666 $ 0.3 D  
Stock Option (Right to Buy)   (4) 02/14/2014 Common Stock 200,000 $ 0.3 D  
Stock Option (Right to Buy)   (5) 07/26/2015 Common Stock 129,999 $ 1.65 D  
Stock Option (Right to Buy)   (6) 04/13/2017 Common Stock 66,666 $ 8.25 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Kathuria Vijay
C/O STARENT NETWORKS, CORP.
30 INTERNATIONAL PLACE
TEWKSBURY, MA 01876		       V.P. & G.M., India  

Signatures

/s/ Vijay Kathuria 06/05/2007
**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) Represents shares of common stock held by The Vijay K. Kathuria Grantor Retained Annuity Trust-2007. Mr. Kathuria disclaims beneficial ownership of these shares except to the extent of his pecuniary interest, if any.
(2) Represents shares of common stock held by Mr. Kathuria's wife, Sangeeta Kathuria. Mr. Kathuria disclaims beneficial ownership of these shares except to the extent of his pecuniary interest, if any.
(3) 12.5% of the option vests on each of 1/23/04, 1/23/05, 7/23/05, 1/23/06, 7/23/06, 1/23/07, 7/23/07 and 7/23/08.
(4) The option vests 25% on 9/1/01 and the remainder vests in 12 equal quarterly installments beginning on 12/1/01.
(5) The option vests 25% on 1/1/06 and the remainder vests in 12 equal quarterly installments beginning on 4/1/06.
(6) The option vests 20% on 1/1/08 and the remainder vests in 16 equal quarterly installments beginning on 4/1/08.

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