UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13G

Under the Securities Exchange Act of 1934
(Amendment No. 4)*

Compellent Technologies, Inc.
(Name of Issuer)
Common Stock
(Title of Class of Securities)
20452A 10 8
(CUSIP Number)
February 22, 2011
(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

      o  Rule 13d-1(b)

      o  Rule 13d-1(c)

      þ  Rule 13d-1(d)

* The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

 
 

 

                     
CUSIP No.
 
20452A 10 8 
 

 

           
1   NAMES OF REPORTING PERSONS

Crescendo IV, L.P.
     
     
2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

  (a)    o
  (b)    o
     
3   SEC USE ONLY
   
   
     
4   CITIZENSHIP OR PLACE OF ORGANIZATION
   
  Delaware
       
  5   SOLE VOTING POWER
     
NUMBER OF   0
       
SHARES 6   SHARED VOTING POWER
BENEFICIALLY    
OWNED BY   0
       
EACH 7   SOLE DISPOSITIVE POWER
REPORTING    
PERSON   0
       
WITH: 8   SHARED DISPOSITIVE POWER
     
    0
     
9   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
   
  0
     
10   CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
   
  o
     
11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
   
  0%
     
12   TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
   
  PN

Page 2 of 12 Pages

 

                     
CUSIP No.
 
20452A 10 8 
 

 

           
1   NAMES OF REPORTING PERSONS

Crescendo IV AG & Co. Beteiligungs KG
     
     
2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

  (a)    o
  (b)    o
     
3   SEC USE ONLY
   
   
     
4   CITIZENSHIP OR PLACE OF ORGANIZATION
   
  Germany
       
  5   SOLE VOTING POWER
     
NUMBER OF   0
       
SHARES 6   SHARED VOTING POWER
BENEFICIALLY    
OWNED BY   0
       
EACH 7   SOLE DISPOSITIVE POWER
REPORTING    
PERSON   0
       
WITH: 8   SHARED DISPOSITIVE POWER
     
    0
     
9   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
   
  0
     
10   CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
   
  o
     
11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
   
  0%
     
12   TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
   
  PN

Page 3 of 12 Pages

 

                     
CUSIP No.
 
20452A 10 8 
 

 

           
1   NAMES OF REPORTING PERSONS

Crescendo IV Entrepreneurs Fund, L.P.
     
     
2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

  (a)    o
  (b)    o
     
3   SEC USE ONLY
   
   
     
4   CITIZENSHIP OR PLACE OF ORGANIZATION
   
  Delaware
       
  5   SOLE VOTING POWER
     
NUMBER OF   0
       
SHARES 6   SHARED VOTING POWER
BENEFICIALLY    
OWNED BY   0
       
EACH 7   SOLE DISPOSITIVE POWER
REPORTING    
PERSON   0
       
WITH: 8   SHARED DISPOSITIVE POWER
     
    0
     
9   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
   
  0
     
10   CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
   
  o
     
11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
   
  0%
     
12   TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
   
  PN

Page 4 of 12 Pages

 

                     
CUSIP No.
 
20452A 10 8 
 

 

           
1   NAMES OF REPORTING PERSONS

Crescendo IV Entrepreneurs Fund A, L.P.
     
     
2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

  (a)    o
  (b)    o
     
3   SEC USE ONLY
   
   
     
4   CITIZENSHIP OR PLACE OF ORGANIZATION
   
  Delaware
       
  5   SOLE VOTING POWER
     
NUMBER OF   0
       
SHARES 6   SHARED VOTING POWER
BENEFICIALLY    
OWNED BY   0
       
EACH 7   SOLE DISPOSITIVE POWER
REPORTING    
PERSON   0
       
WITH: 8   SHARED DISPOSITIVE POWER
     
    0
     
9   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
   
  0
     
10   CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
   
  o
     
11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
   
  0%
     
12   TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
   
  PN

Page 5 of 12 Pages

 

                     
CUSIP No.
 
20452A 10 8 
 

 

           
1   NAMES OF REPORTING PERSONS

Crescendo Ventures IV, LLC
     
     
2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

  (a)    o
  (b)    o
     
3   SEC USE ONLY
   
   
     
4   CITIZENSHIP OR PLACE OF ORGANIZATION
   
  Delaware
       
  5   SOLE VOTING POWER
     
NUMBER OF   0
       
SHARES 6   SHARED VOTING POWER
BENEFICIALLY    
OWNED BY   0
       
EACH 7   SOLE DISPOSITIVE POWER
REPORTING    
PERSON   0
       
WITH: 8   SHARED DISPOSITIVE POWER
     
    0
     
9   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
   
  0
     
10   CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
   
  o
     
11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
   
  0%
     
12   TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
   
  OO

Page 6 of 12 pages

 

                     
CUSIP No.
 
20452A 10 8 
 

 

           
1   NAMES OF REPORTING PERSONS

Crescendo German Investments IV, LLC
     
     
2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

  (a)    o
  (b)    o
     
3   SEC USE ONLY
   
   
     
4   CITIZENSHIP OR PLACE OF ORGANIZATION
   
  Delaware
       
  5   SOLE VOTING POWER
     
NUMBER OF   0
       
SHARES 6   SHARED VOTING POWER
BENEFICIALLY    
OWNED BY   0
       
EACH 7   SOLE DISPOSITIVE POWER
REPORTING    
PERSON   0
       
WITH: 8   SHARED DISPOSITIVE POWER
     
    0
     
9   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
   
  0
     
10   CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
   
  o
     
11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
   
  0%
     
12   TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
   
  OO

Page 7 of 12 Pages

 

                     
CUSIP No.
 
20452A 10 8 
 

 

           
1   NAMES OF REPORTING PERSONS

R. David Spreng
     
     
2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

  (a)    o
  (b)    o
     
3   SEC USE ONLY
   
   
     
4   CITIZENSHIP OR PLACE OF ORGANIZATION
   
  United States
       
  5   SOLE VOTING POWER
     
NUMBER OF   0
       
SHARES 6   SHARED VOTING POWER
BENEFICIALLY    
OWNED BY   0
       
EACH 7   SOLE DISPOSITIVE POWER
REPORTING    
PERSON   0
       
WITH: 8   SHARED DISPOSITIVE POWER
     
    0
     
9   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
   
  0
     
10   CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
   
  o
     
11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
   
  0%
     
12   TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
   
  IN

Page 8 of 12 Pages

 

Item 1.
  (a)  
Name of Issuer
     Compellent Technologies, Inc.
 
  (b)  
Address of Issuer’s Principal Executive Offices
     7625 Smetana Lane
     Eden Prairie, MN 55344
Item 2.
  (a)  
Name of Person Filing
     Crescendo Ventures IV, L.P. (“Crescendo IV”)
     Crescendo IV AG & Co. Beteiligungs KG (“IV KG”)
     Crescendo IV Entrepreneurs Fund, L.P. (“IV EF”)
     Crescendo IV Entrepreneurs Fund A, L.P. (“IV EFA”)
     Crescendo Ventures IV, LLC (“IV LLC”)
     Crescendo German Investments IV, LLC (“German IV LLC”)
     R. David Spreng
 
  (b)  
Address of Principal Business Office or, if none, Residence
 
         
     600 Hansen Way
     Palo Alto, CA 94304
 
  (c)  
Citizenship
     
Entities:
  Crescendo IV — Delaware
 
  IV KG — Germany
 
  IV EF — Delaware
 
  IV EFA — Delaware
 
  IV LLC — Delaware
 
  German IV LLC — Delaware
 
   
Individuals:
  R. David Spreng — United States
  (d)  
Title of Class of Securities
     Common Stock
 
  (e)  
CUSIP Number
     20452A 10 8
Item 3.  
If this statement is filed pursuant to §§240.13d-1(b), or 240.13d-2(b) or (c), check whether the person filing is a:
Not applicable

 

Page 9 of 12 Pages

 

 
 
Item 4. Ownership
                                 
    Crescendo IV     IV KG     IV EF     IV EFA  
(a) Beneficial Ownership
    -0-       -0-       -0-       -0-  
 
                       
(b) Percentage of Class
    0 %     0 %     0 %     0 %
 
                       
(c) Sole Voting Power
    -0-       -0-       -0-       -0-  
 
                       
Shared Voting Power
    -0-       -0-       -0-       -0-  
 
                       
Sole Dispositive Power
    -0-       -0-       -0-       -0-  
 
                       
Shared Dispositive Power
    -0-       -0-       -0-       -0-  
 
                       
                         
    IV LLC     German IV LLC     R. David Spreng  
(a) Beneficial Ownership
    -0-       -0-       -0-  
 
                 
(b) Percentage of Class
    0 %     0 %     0 %
 
                 
(c) Sole Voting Power
    -0-       -0-       -0-  
 
                 
Shared Voting Power
    -0-       -0-       -0-  
 
                 
Sole Dispositive Power
    -0-       -0-       -0-  
 
                 
Shared Dispositive Power
    -0-       -0-       -0-  
 
                 
Item 5.  
Ownership of Five Percent or Less of a Class
If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following  þ .
Item 6.  
Ownership of More than Five Percent on Behalf of Another Person
Not applicable.
Item 7.  
Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company or Control Person.
Not applicable.
Item 8.  
Identification and Classification of Members of the Group
Not applicable.
Item 9.  
Notice of Dissolution of a Group
Not applicable.
Item 10.  
Certification
Not applicable.

 

Page 10 of 12 Pages

 

SIGNATURE
After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.
February 23, 2011
                 
CRESCENDO IV, L.P.       CRESCENDO IV AG & CO. BETEILIGUNGS KG
 
               
By:
  Crescendo Ventures IV, LLC       By:   Crescendo German Investments IV, LLC
 
  its general partner           its general partner
 
               
By:
  /s/ R. David Spreng       By:   /s/ R. David Spreng
 
               
 
  R. David Spreng           R. David Spreng
 
  Managing General Partner           Managing General Partner
 
               
CRESCENDO IV ENTREPRENEURS FUND, L.P.       CRESCENDO IV ENTREPRENEURS FUND A, L.P.
 
               
By:
  Crescendo Ventures IV, LLC       By:   Crescendo Ventures IV, LLC
 
  its general partner           its general partner
 
               
By:
  /s/ R. David Spreng       By:   /s/ R. David Spreng
 
               
 
  R. David Spreng           R. David Spreng
 
  Managing General Partner           Managing General Partner
 
               
CRESCENDO VENTURES IV, LLC       CRESCENDO GERMAN INVESTMENTS IV, LLC
 
               
By:
  /s/ R. David Spreng       By:   /s/ R. David Spreng
 
               
 
  R. David Spreng           R. David Spreng
 
  Managing General Partner           Managing General Partner
 
               
/s/ R. David Spreng            
             
R. David Spreng            
R. David Spreng            
EXHIBITS
A: Joint Filing Agreement

 

Page 11 of 12 Pages

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