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 * MV Management X, L.L.C.   2. Issuer Name and Ticker or Trading Symbol Carbonite Inc [CARB] 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) 3000 SAND HILL ROAD, BUILDING 4, SUITE 100 3. Date of Earliest Transaction (Month/Day/Year) 05/09/2012 (Street) MENLO PARK, CA 94025 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 Common Stock 05/09/2012   P   1,367 A $ 7.42 (1) 6,525,665 I By Menlo Ventures X, L.P. (3) Common Stock 05/09/2012   P   27,135 A $ 8.37 (2) 6,552,800 I By Menlo Ventures X, L.P. (3) Common Stock 05/09/2012   P   12 A $ 7.42 (1) 55,470 I By Menlo Entrepreneurs Fund X, L.P. (4) Common Stock 05/09/2012   P   230 A $ 8.37 (2) 55,700 I By Menlo Entrepreneurs Fund X, L.P. (4) Common Stock 05/09/2012   P   24 A $ 7.42 (1) 114,203 I By MMEF X, L.P. (5) Common Stock 05/09/2012   P   475 A $ 8.37 (2) 114,678 I By MMEF X, L.P. (5)

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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
MV Management X, L.L.C. 3000 SAND HILL ROAD BUILDING 4, SUITE 100 MENLO PARK, CA 94025		X
Menlo Ventures X L P 3000 SAND HILL ROAD BUILDING 4, SUITE 100 MENLO PARK, CA 94025		X
MENLO ENTREPRENEURS FUND X LP 3000 SAND HILL ROAD BUILDING 4, SUITE 100 MENLO PARK, CA 94025		X
MMEF X LP 3000 SAND HILL ROAD BUILDING 4, SUITE 100 MENLO PARK, CA 94025		X

Signatures

/s/ Pravin A. Vazirani, Managing Member of MV Management X, L.L.C.		05/11/2012
**Signature of Reporting Person		Date
/s/ Pravin A. Vazirani, Managing Member of MV Management X, L.L.C., which serves as the General Partner of Menlo Ventures X, L.P.		05/11/2012
**Signature of Reporting Person		Date
/s/ Pravin A. Vazirani, Managing Member of MV Management X, L.L.C., which serves as the General Partner of Menlo Entrepreneurs Fund X, L.P.		05/11/2012
**Signature of Reporting Person		Date
/s/ Pravin A. Vazirani, Managing Member of MV Management X, L.L.C., which serves as the General Partner of MMEF X, L.P.		05/11/2012
**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)	Price reflected is the weighted-average purchase price for shares purchased. The range of purchase prices for the transactions reported was $7.30 to $7.50 per share. The reporting persons undertake to provide, upon request by the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares purchased or sold at each separate price.
(2)	Price reflected is the weighted-average purchase price for shares purchased. The range of purchase prices for the transactions reported was $7.985 to $8.50 per share. The reporting persons undertake to provide, upon request by the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares purchased or sold at each separate price.
(3)	These shares are owned directly by Menlo Ventures X, L.P. ("Menlo X"). MV Management X, L.L.C. ("MVM X") serves as the general partner of Menlo X and posseses sole voting and investment control over the shares owned by Menlo X and may be deemed to have indirect beneficial ownership of the shares held by Menlo X. MVM X however owns no securities of the Issuer directly. The Reporting Persons disclaim beneficial ownership of the shares reported herein, except to the extent of their respective proportionate pecuniary interests therein.
(4)	These shares are owned directly by Menlo Entrepreneurs Fund X, L.P. ("MEF X"). MVM X serves as the general partner of MEF X and posseses sole voting and investment control over the shares owned by MEF X and may be deemed to have indirect beneficial ownership of the shares held by MEF X. MVM X however owns no securities of the Issuer directly. The Reporting Persons disclaim beneficial ownership of the shares reported herein, except to the extent of their respective proportionate pecuniary interests therein.
(5)	Theses shares are owned directly by MMEF X, L.P. ("MMEF X"). MVM X serves as the general partner of MMEF X and posseses sole voting and investment control over the shares owned by MMEF X and may be deemed to have indirect beneficial ownership of the shares held by MMEF X. MVM X however owns no securities of the Issuer directly. The Reporting Persons disclaim beneficial ownership of the shares reported herein, except to the extent of their respective proportionate pecuniary interests therein.

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