ALISO VIEJO, Calif., Dec. 16, 2008 – Quest Software, Inc. (Nasdaq: QSFT) today announced the final results of its previously announced modified “Dutch Auction” tender offer, which expired at 5:00 P.M., New York City Time, on Tuesday, December 9, 2008. 

Quest has accepted for purchase 11,440,000 shares in the tender offer, at a price of $12.50 per share, for a total cost of $143,000,000, excluding fees and expenses related to the tender offer. Based on the depositary’s final count, a total of 15,640,339 shares, including 27,759 odd lot shares, were validly tendered in the tender offer at a price of $12.50 per share. Accordingly, the final proration factor for the offer was 73.1 percent. The 11,440,000 shares purchased in the tender offer represent 10.8% of the shares outstanding on December 9, 2008.

The shares to be purchased in the tender offer include the 9,656,000 shares Quest initially offered to purchase and 1,784,000 additional shares Quest has elected to purchase pursuant to the terms of the tender offer.

The depositary will promptly make payment for the shares accepted for purchase and will promptly return all other shares tendered and not purchased.

About Quest Software

Quest Software, Inc., a leading enterprise systems management vendor, delivers innovative products that help organizations get more performance and productivity from their applications, databases, Windows infrastructure and virtual environments. Quest also provides customers with client management through its ScriptLogic subsidiary and server virtualization management through its Vizioncore subsidiary. Through a deep expertise in IT operations and a continued focus on what works best, Quest helps more than 100,000 customers worldwide meet higher expectations for enterprise IT. Quest Software can be found in offices around the globe and at www.quest.com.