SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* SPRENG R DAVID (Last) (First) (Middle) C/O CRESCENDO VENTURES 480 COWPER STREET, SUITE 300 (Street) PALO ALTO CA 94301 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol COMPELLENT TECHNOLOGIES INC [ CML ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X Director X 10% Owner Officer (give title below) Other (specify below)
	3. Date of Earliest Transaction (Month/Day/Year) 08/29/2008
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	08/29/2008		S		4,100	D	$12.99(1)	3,770,764	I	By Crescendo IV, L.P.(2)(3)
Common Stock								234,404	I	by Crescendo IV AG & Co. Beteiligungs KG(2)(4)
Common Stock								75,794	I	By Crescendo IV Entrepreneurs Fund, L.P.(2)(5)
Common Stock								29,243	I	By Crescendo IV Entrepreneurs Fund A L.P.(2)(6)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Represents the average sales price. The shares were sold between $12.95 and $13.08. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.

2. R. David Spreng is the managing general partner of Crescendo Ventures IV, LLP ("Crescendo LLP") and Crescendo German Investments IV, LLC ("Crescendo GI"). Crescendo LLP is the general partner Crescendo IV, L.P. ("Crescendo IV"), Crescendo IV Enterpreneurs Fund, L.P. ("Crescendo EF") and Crescendo IV Entrepreneurs Fund A, L.P. ("Crescendo EFA") and Crescendo GI is the general partner of Crescendo IV AG & Co. Beteiligungs KG ("Crescendo KG"). Mr. Spreng disclaims beneficial ownership of these securities except to the extent of his pecuniary interest, and this report shall not be deemed to be an admission that Mr. Spreng is the beneficial owner of these securities for purposes of Section 16 or for any other purpose.

3. Consists of shares owned by Crescendo IV. Crescendo LLP, as the general partner of Crescendo IV, may be deemed to beneficially own the shares owned by Crescendo IV. Mr. Spreng disclaims beneficial ownership of the shares owned by Crescendo IV except to the extent of his pecuniary interest.

4. Consists of shares owned by Crescendo KG. Crescendo GI, as the general partner of Crescendo KG, may be deemed to beneficially own the shares owned by Crescendo KG. Mr. Spreng disclaims beneficial ownership of the shares owned by Crescendo KG except to the extent of his pecuniary interest.

5. Consists of shares owned by Crescendo EF. Crescendo LLP, as the general partner of Crescendo EF, may be deemed to beneficially own the shares owned by Crescendo EF. Mr. Spreng disclaims beneficial ownership of the shares owned by Crescendo EF except to the extent of his pecuniary interest.

6. Consists of shares owned by Crescendo EFA. Crescendo LLP, as the general partner of Crescendo EFA, may be deemed to beneficially own the shares owned by Crescendo EFA. Mr. Spreng disclaims beneficial ownership of the shares owned by Crescendo EF except to the extent of his pecuniary interest.

Remarks:

	/s/ Nicole C. Brookshire, Attorney-in-Fact for R. David Spreng	09/03/2008
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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