SEC FORM 4

SEC Form 4

FORM 4

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
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person^*

COXE TENCH

(Last)

(First)

(Middle)

755 PAGE MILL ROAD, SUITE A-200

(Street)

PALO ALTO

943041005

(City)

(State)

(Zip)

2. Issuer Name and Ticker or Trading Symbol
Data Domain, Inc. [ DDUP ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

Director	X	10% Owner
Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
12/03/2007

4. If Amendment, Date of 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

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	12/03/2007		S⁽¹⁾		597	D	$25.8862⁽²⁾	100,562	I	By Ltd Partnership⁽³⁾
Common Stock	12/03/2007		S⁽¹⁾		29,223⁽⁴⁾	D	$25.8862⁽²⁾	4,917,568⁽⁵⁾	I	By Ltd Partnership (SHV)⁽⁶⁾
Common Stock	12/03/2007		S⁽¹⁾		1,761	D	$25.8862⁽²⁾	296,367	I	By Profit Sharing Plan Trust⁽⁷⁾
Common Stock	12/03/2007		S⁽¹⁾		553	D	$25.8862⁽²⁾	93,127	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 (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 Securities Underlying Derivative Security (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: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. The shares were sold upon a partial exercise of the over-allotment option by the underwriters, pursuant to the prospectus filed with the SEC on 11/16/2007.

2. Actual price was $25.88625.

3. Shares held by a limited partnership of which the reporting person is a trustee of the trust which is the General Partner. The reporting person disclaims beneficial ownership in these shares except as to the reporting person's pecuniary interest therein.

4. Excludes 472 shares sold by Sutter Hill Ventures, A California Limited Partnership on behalf of Ronald D. Bernal, a director of the issuer. Sutter Hill Ventures, A California Limited Partnership does not have beneficial ownership over these 472 shares.

5. Excludes 79,330 shares held by Sutter Hill Ventures, A California Limited Partnership on behalf of Ronald D. Bernal, a director of the issuer. Sutter Hill Ventures, A California Limited Partnership does not have beneficial ownership over these 79,330 shares.

6. Shares held by Sutter Hill Ventures, A California Limited Partnership. The reporting person is a Managing Director of the General Partner of Sutter Hill Ventures, A California Limited Partnership. The reporting person disclaims beneficial ownership in these shares except as to the reporting person's pecuniary interest in the partnership.

7. Shares held by SHV Profit Sharing Plan, a retirement trust, for the benefit of the reporting person.

8. Shares held by a trust of which the reporting person is a trustee. The reporting person disclaims beneficial ownership in these shares except as to the reporting person's pecuniary interest in the trust.

Remarks:

	By: Robert Yin, by power of attorney	12/05/2007
	** Signature of Reporting Person	Date
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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