X0303 4/A 2009-06-26 2009-06-30 0 0001368582 ArcSight Inc ARST 0001294775 Ramsey Craig C/O ARCSIGHT, INC. 5 RESULTS WAY CUPERTINO CA 95014 1 0 0 0 Common Stock 2009-06-26 4 S 0 70000 17.0911 D 1126182 I See Footnote 2 Common Stock 2009-06-29 4 S 0 33000 18.0437 D 1093182 I See Footnote 4 Represents a weighted average sales price per share. The prices actually received ranged from $16.78 to $17.30. The reporting person has provided to the issuer, and will provide to the SEC staff or any security holder of the issuer, information regarding the number of shares sold at each price within the range. Represents 725,062 shares held by the reporting person, 234,090 shares held by the reporting person and spouse, together, and 167,030 shares held by the reporting person's spouse. Represents a weighted average sales price per share. The prices actually received ranged from $17.97 to $18.17. The reporting person has provided to the issuer, and will provide to the SEC staff or any security holder of the issuer, information regarding the number of shares sold at each price within the range. Represents 725,062 shares held by the reporting person, 201,090 shares held by the reporting person and spouse, together, and 167,030 shares held by the reporting person's spouse. Amends and restates in its entirety the Form 4 filed June 30, 2009 to amend the transaction date for the second transaction provided in column 2 of Table I. /s/ Tram T. Phi as attorney-in-fact for Craig Ramsey 2009-06-30