The all-cash deal is worth $27.75 per share, a little more than the $27.50 per share price tag it was discussing with the company last week, but still lower than the stock's Monday-morning opening price of $28.30.
Dell hopes to expand its range of enterprise storage products with Compellent's virtualised storage products, which offer thin provisioning and tiering.
The new price tag values Compellent at around $960 million, and puts the cost of the deal to Dell at about $820 million, net of Compellent's cash. The companies expect to complete the deal early next year, if Compellent's shareholders approve it.
Analysts said last week that counterbids are less likely, since the incumbent players in storage have already built out portfolios. It might be more likely that vendors such as networking giant Cisco will submit offers as they look to diversify.
Overall, the storage market is becoming red hot as companies around the world grapple with rapidly expanding data volumes. Global disk storage systems revenue during the third quarter was about $7 billion, increasing by 18.5 percent compared to the third quarter last year, analyst firm IDC said recently.
The worldwide storage software market is exhibiting strength as well, with third-quarter revenue of $3.1 billion, an 8.7 percent jump over the same quarter last year, according to other IDC figures.
Dell executives cited those trends during a conference call Monday.
"Data creation is exploding. Our customers are struggling to manage and store their content," said Dave Johnson, Dell senior vice president of corporate strategy. The Compellent deal will complement past acquisitions Dell has made to build a comprehensive storage lineup, which include EqualLogic and Ocarina, he said.
The storage sector is afflicted by too many point products that don't work well enough together, said Brad Anderson, senior vice president of enterprise products at Dell. Customers want a technology set that allows them to easily move data from primary to secondary storage, and eventually archive it, as well as perform tasks like deduplication, he said. "You can't accomplish this when you have all these point solutions that are all incompatible with each other."
Analysts have said there is considerable overlap between EqualLogic's target audience and Compellent, as both cater mostly to midmarket companies. However, Compellent does provide Fibre Channel-based networking, a widely used enterprise standard, while EqualLogic provides only iSCSI connectivity.
Although Compellent is "in a slightly different place" compared to 3Par, it has had "very good success against 3Par, and also covers the midrange even more effectively," Anderson said.
He noted that Compellent has been "doing many of the same things as EqualLogic in terms of virtualisation and automated tiering." It will take multiple product generations but eventually many of Compellent's technologies will be extended across the broader portfolio, he said.
Compellent has 2,500 customers and 490 employees, and logged about $125 million in revenue during 2009. It has sold its products entirely through channel partners. That program will be maintained and improved, but Dell has also signed a reseller agreement with Compellent to sell its products directly.
The agreement is meant to help Dell sales teams learn about Compellent's products and spread the word to customers prior to the deal's closing, Johnson said.
Meanwhile, Dell's move to buy Compellent is expected to put a damper on its partnership with EMC. Under that agreement, Dell sells EMC's high-end Symmetrix product as well as the midrange CLARiiON line.
EMC and Dell have been in discussions, and will "continue to support those [joint] customers as they want to be supported," Anderson said.
While Compellent will give Dell a solid hand in the storage market, it will remain open to additional acquisitions, executives said.