UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 8-K

CURRENT REPORT PURSUANT TO
SECTION 13 OR 15(d) OF THE
SECURITIES EXCHANGE ACT OF 1934

Date of report: March 13, 2008
(Date of earliest event reported)

ArcSight, Inc.

(Exact Name of Registrant as Specified in Its Charter)

Delaware
(State or Other Jurisdiction of Incorporation)

001-33923 (Commission File Number)	52-2241535 (IRS Employer Identification No.)
5 Results Way Cupertino, California	95014
(Address of Principal Executive Offices)	(Zip Code)

(408) 864-2600
(Registrant’s Telephone Number, Including Area Code)

     Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

     o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

     o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

     o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

     o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

TABLE OF CONTENTS

EXHIBIT 99.01

Item 2.02. Results of Operations and Financial Condition.

On March 13, 2008, ArcSight, Inc. (“ArcSight”) issued a press release announcing its financial results for the third fiscal quarter ended January 31, 2008 and providing its business outlook. A copy of the press release is attached as Exhibit 99.01 to this Current Report on Form 8-K.

The information in this Current Report, including Exhibit 99.01 to this Current Report, shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section or Sections 11 and 12(a)(2) of the Securities Act of 1933, as amended. The information contained in this Item 2.02 and in the accompanying Exhibit 99.01 shall not be incorporated by reference into any registration statement or other document filed by ArcSight with the Securities and Exchange Commission, whether made before or after the date of this Current Report, regardless of any general incorporation language in such filing, except as shall be expressly set forth by specific reference in such filing.

Item 9.01. Financial Statements and Exhibits.

     (d) Exhibits.

Number	Description
99.01	Press release issued by ArcSight, Inc., dated March 13, 2008.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

ArcSight, Inc.
By:	/s/ Stewart Grierson
	Stewart Grierson
	Chief Financial Officer

Date: March 13, 2008

EXHIBIT INDEX

Number	Description
99.01	Press release issued by ArcSight, Inc., dated March 13, 2008.