Compellent 8-K COMPELLENT REPORTS RECORD QUARTERLY REVENUE Surpasses 2,000 End Users as Enterprises Adopt Fluid Data™ Solutions

Exhibit 99.1

COMPELLENT REPORTS RECORD QUARTERLY REVENUE
Surpasses 2,000 End Users as Enterprises Adopt Fluid Data™ Solutions

EDEN PRAIRIE, Minn., July 28, 2010— Compellent Technologies, Inc. (NYSE: CML) today announced record revenue of $36.5 million for the second quarter ended June 30, 2010. This represents a 27 percent increase from the same quarter in 2009.

Highlights for Q2 2010 include:

• Revenue of $36.5 million represents a 15 percent sequential increase over the first quarter of 2010.

• GAAP net loss was $172,000, or $0.01 loss per share. Non-GAAP net income, which excludes stock-based compensation expense, was $1.5 million, or $0.04 income per share.

• Total installed base grew to 2,124 end-user customers, an increase of 182 new end-users from the previous quarter.

• Deferred revenue was $46.5 million, an increase of $8.3 million from December 31, 2009.

• Cash and investments totaled $132.0 million, compared to $123.8 million at December 31, 2009.

“I’m very pleased with this growth quarter and our positive trajectory. These results reflect our technology leadership, business model advantages, world class support and strong execution,” said Phil Soran, president and CEO of Compellent. “In the last three months, 182 organizations chose Compellent over larger competitors’ systems because they recognized the value of an efficient storage platform with the future built in. Our vision of storage as the intelligent, easily-managed core of a virtualized data center continues to gain traction as enterprises adopt our Fluid Data architecture.”

Additional Q2 highlights include:

• Gross margin was 53.6 percent in the second quarter of 2010 compared with 53.7 percent in the second quarter of 2009.

• Revenue totaled $68.3 million for the six months ended June 30, 2010, which is an $11.5 million, or 20 percent increase, compared to $56.8 million in the same period last year.

• GAAP net loss was $1.0 million, or $0.03 loss per share for the six months ended June 30, 2010. Non-GAAP net income, which excludes stock-based compensation, was $2.0 million, or $0.06 income per share.

• Product revenue from new end-users totaled 44 percent on a year-to-date basis compared with 56 percent from existing end-users.

“Whether integrating file and block storage or implementing services from corporate IT or cloud providers, enterprises need solutions that manage storage more efficiently,”

continued Mr. Soran. “Our proven tiered storage technology and automated, granular management of data, which we call Fluid Data, will continue to be catalysts for Compellent’s growth worldwide.”

Conference Call

The company has scheduled a conference call to discuss its second quarter results and current business developments today, July 28, at 4:30 p.m. ET. To access the call, dial 877-941-1467 domestically or 480-629-9677 internationally. The call will also be webcast live athttp://www.compellent.com/investors. An audio replay will be available for seven days following the call at 800-406-7325 for U.S. callers or 303-590-3030 for those calling outside the U.S. The password required to access the replay is 4328738#. An archived webcast will also be available athttp://www.compellent.com/investors until the company’s conference call to discuss its third quarter 2010 financial results.

Non-GAAP Measures

To supplement the company’s condensed consolidated statements of operations presented in accordance with GAAP, the company uses non-GAAP measures for operating income (loss) and net income (loss). In order for investors to be better able to compare the company’s current results with those of previous periods, the company has shown a reconciliation of the GAAP to non-GAAP financial measures at the end of this press release. This reconciliation adjusts the related GAAP financial measures to exclude stock-based compensation expense. The company believes the presentation of these non-GAAP financial measures enhance the user’s overall understanding of the company’s historical financial performance. The presentation of non-GAAP measures is not meant to be considered in isolation or as a substitute for the company’s financial results prepared in accordance with GAAP, and the company’s non-GAAP financial measures may be different from non-GAAP financial measures used by other companies.

About Compellent

Compellent Technologies (NYSE: CML) provides Fluid Data storage solutions that automate the movement and management of data at a granular level, enabling organizations to constantly adapt to change, slash costs and secure information against downtime and disaster. This patented, built-in storage intelligence delivers significant efficiency, scalability and flexibility. With an all-channel sales network in 35 countries, Compellent is one of the fastest growing enterprise storage companies in the world. For more information and news, visitwww.compellent.com andwww.compellent.com/news.

This press release contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Specifically, statements concerning the demand for the company’s storage solution from midsized and larger enterprises, the growing base of end users, the anticipated expansion of the company’s addressable market, the company’s growth prospects, the advantages of the company’s business model and adequacy of the company’s financial resources are forward-looking statements within the meaning of the safe harbor. These statements involve known and unknown risks, uncertainties and other factors that may cause actual results, performance, time frames or achievements to be materially different from those expressed or implied by the forward-looking statements. Forward-looking statements are subject to risks and uncertainties, including unfavorable economic and market conditions,

lessening demand in the information technology market, slower than expected growth of the small-to-medium-to-large sized enterprise storage market or adoption of the company’s storage solution; the impact of technological developments and competition; the company’s reliance on third-parties to sell their storage solution; pricing and availability of suppliers’ products; general industry trends; the company’s capital and operating requirements to grow its business and changes in industry standards and interfaces, which may cause actual results to differ materially from the statements contained herein. Further information on potential risk factors that could affect Compellent’s business and its financial results are detailed in its filings with the Securities and Exchange Commission, including its Annual Report on Form 10-K for the year ended December 31, 2009. Undue reliance should not be placed on forward-looking statements, which speak only as of the date they are made, and, except as required by law. Compellent disclaims any obligation to update these forward-looking statements to reflect future events or circumstances.

Contact Information:

Investor Contacts:

Jack Judd
Compellent Technologies
952-294-3316

Jenifer Kirtland
EVC Group
415-896-6820
jkirtland@evcgroup.com

Media Contact:
Liem Nguyen
Compellent Technologies
952-294-2851
lnguyen@compellent.com

COMPELLENT TECHNOLOGIES, INC.
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
(unaudited, in thousands, except per share amounts)

	For the Three Months						For the Six Months
	Ended June 30,						Ended June 30,
	2010			2009			2010			2009
Revenues
Product	$	24,842		$	20,288		$	45,457		$	41,577
Support and services		11,652			8,428			22,864			15,212
Total revenues		36,494			28,716			68,321			56,789
Cost of revenues
Product		13,036			10,306			23,617			21,132
Support and services		3,886			2,983			7,677			5,407
Total cost of revenues		16,922			13,289			31,294			26,539
Gross profit		19,572			15,427			37,027			30,250
Operating expenses
Sales and marketing		13,216			10,846			25,366			20,666
Research and development		4,542			3,074			8,837			5,884
General and administrative		2,139			1,550			4,222			2,950
Total operating expenses		19,897			15,470			38,425			29,500
Operating income (loss)		(325	)		(43	)		(1,398	)		750
Other income, net		311			419			716			915
Income (loss) before income taxes		(14	)		376			(682	)		1,665
Income tax expense		158			129			270			405
Net income (loss)	$	(172	)	$	247		$	(952	)	$	1,260
Net income (loss) per weighted average share, basic	$	(0.01	)	$	0.01		$	(0.03	)	$	0.04
Net income (loss) per weighted average share, diluted	$	(0.01	)	$	0.01		$	(0.03	)	$	0.04
Weighted average shares, basic		31,773			30,729			31,728			30,688
Weighted average shares, diluted		31,773			32,840			31,728			32,634

COMPELLENT TECHNOLOGIES, INC.
CONDENSED CONSOLIDATED BALANCE SHEETS
(in thousands)

	June 30,		December 31,
	2010		2009
	(unaudited)
Assets
Current assets
Cash and cash equivalents	$	28,014	$	29,155
Short-term investments		29,628		35,218
Accounts receivable, net		34,112		36,702
Inventories, net		8,301		4,750
Other current assets		4,008		3,497
Total current assets		104,063		109,322
Long-term investments		74,363		59,472
Property and equipment, net		8,184		5,153
Total assets	$	186,610	$	173,947
Liabilities and stockholders’ equity
Current liabilities
Accounts payable	$	8,819	$	8,968
Accrued compensation		6,232		5,489
Accrued liabilities		1,583		1,261
Deferred revenues, current		30,294		25,668
Total current liabilities		46,928		41,386
Deferred revenues, non-current		16,234		12,529
Stockholders’ equity		123,448		120,032
Total liabilities and stockholders’ equity	$	186,610	$	173,947

COMPELLENT TECHNOLOGIES, INC.
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
(unaudited, in thousands)

	For the Six Months
	Ended June 30,
	2010			2009
Operating activities
Net income (loss)	$	(952	)	$	1,260
Adjustments to reconcile net income (loss) to net cash
provided by operating activities:
Depreciation and amortization		1,567			1,076
Stock-based compensation expense		2,962			2,075
Changes in operating assets and liabilities		7,785			1,071
Net cash provided by operating activities		11,362			5,482
Investing activities
Purchases of property and equipment		(4,598	)		(1,857	)
Purchases of investments		(57,851	)		(54,119	)
Proceeds from sales and maturities of investments		48,847			31,014
Net cash used in investing activities		(13,602	)		(24,962	)
Net cash provided by financing activities		1,099			633
Net decrease in cash and cash equivalents		(1,141	)		(18,847	)
Cash and cash equivalents, beginning of period		29,155			51,989
Cash and cash equivalents, end of period	$	28,014		$	33,142

COMPELLENT TECHNOLOGIES, INC.
RECONCILIATION OF GAAP TO NON-GAAP FINANCIAL MEASURE
(unaudited, in thousands, except per share amounts)

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2010			2009			2010			2009
Operating income (loss):
GAAP operating income (loss)	$	(325	)	$	(43	)		(1,398	)		750
Stock-based compensation expense:
Cost of product		18			12			33			26
Cost of support and services		49			75			89			138
Sales and marketing		757			544			1,372			893
Research and development		333			267			603			413
General and administrative		481			389			865			605
Total stock-based compensation expense		1,638			1,287			2,962			2,075
Non-GAAP operating income		1,313			1,244			1,564			2,825
Net income (loss):
GAAP net income (loss)		(172	)		247			(952	)		1,260
Add back: stock-based compensation expense		1,638			1,287			2,962			2,075
Non-GAAP net income	$	1,466		$	1,534		$	2,010		$	3,335
Non-GAAP net income per weighted average share, diluted, adjusted for stock-based compensation expense	$	0.04		$	0.05		$	0.06		$	0.10
Weighted average shares, diluted		32,607			32,840			32,792			32,634