12b-25
     
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  SEC FILE NUMBER  
 
 
 
     
  CUSIP NUMBER  
 
 
 
 
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 12b-25
NOTIFICATION OF LATE FILING
           
(Check one):   o  Form 10-K o  Form 20-F o  Form 11-K þ  Form 10-Q o  Form 10-D o  Form N-SAR o  Form N-CSR
 
         
 
  For Period Ended:   March 31, 2009
 
     
 
         
    o   Transition Report on Form 10-K  
 
         
    o   Transition Report on Form 20-F  
 
         
    o   Transition Report on Form 11-K  
 
         
    o   Transition Report on Form 10-Q  
 
         
    o   Transition Report on Form N-SAR  
 
         
 
  For the Transition Period Ended:    
 
       

Read Instruction (on back page) Before Preparing Form. Please Print or Type.
Nothing in this form shall be construed to imply that the Commission has verified any information contained herein.
If the notification relates to a portion of the filing checked above, identify the Item(s) to which the notification relates:
PART I — REGISTRANT INFORMATION
La Jolla Pharmaceutical Company
 
Full Name of Registrant
 
Former Name if Applicable

6455 Nancy Ridge Drive
 
Address of Principal Executive Office (Street and Number)
San Diego, California 92121
 
City, State and Zip Code
PART II — RULES 12b-25(b) AND (c)
If the subject report could not be filed without unreasonable effort or expense and the registrant seeks relief pursuant to Rule 12b-25(b), the following should be completed. (Check box if appropriate)
           
þ
    (a)   The reason described in reasonable detail in Part III of this form could not be eliminated without unreasonable effort or expense
       
    (b)   The subject annual report, semi-annual report, transition report on Form 10-K, Form 20-F, Form 11-K, Form N-SAR or Form N-CSR, or portion thereof, will be filed on or before the fifteenth calendar day following the prescribed due date; or the subject quarterly report or transition report on Form 10-Q or subject distribution report on Form 10-D, or portion thereof, will be filed on or before the fifth calendar day following the prescribed due date; and
       
      (c)   The accountant’s statement or other exhibit required by Rule 12b-25(c) has been attached if applicable.
PART III — NARRATIVE
State below in reasonable detail why Forms 10-K, 20-F, 11-K, 10-Q, 10-D, N-SAR, N-CSR, or the transition report or portion thereof, could not be filed within the prescribed time period.
The Registrant’s Quarterly Report on Form 10-Q (the“Report”) for the quarter ended March 31, 2009 cannot be filed on or prior to the prescribed May 11, 2009 due date without unreasonable effort or expense due to a significant event that occurred in February 2009. As discussed in previous filings with the Securities and Exchange Commission, on February 12, 2009, the Registrant completed the first interim efficacy analysis of its Riquent® Phase 3 ASPEN study and determined that continuing the study was futile. As a result, the Registrant terminated a substantial number of its employees on April 20, 2009. Due to the discontinuation of the study and the reduction in force, the limited remaining personnel at the Registrant were required to assume duties in addition to their financial reporting responsibilities and the Registrant will be unable to file the Report by the prescribed May 11, 2009 due date. The Report is expected to be filed within the 5 day extension permitted by the rules of the Securities and Exchange Commission.
SEC 1344 (05-06)   Persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.

 


 

(Attach extra Sheets if Needed)
PART IV — OTHER INFORMATION
(1)   Name and telephone number of person to contact in regard to this notification
         
Gail A. Sloan    858    646-6644 
(Name)
  (Area Code)   (Telephone Number)
(2)   Have all other periodic reports required under Section 13 or 15(d) of the Securities Exchange Act of 1934 or Section 30 of the Investment Company Act of 1940 during the preceding 12 months or for such shorter period that the registrant was required to file such report(s) been filed? If answer is no, identify report(s).
    Yes þ     No o
 
(3)   Is it anticipated that any significant change in results of operations from the corresponding period for the last fiscal year will be reflected by the earnings statements to be included in the subject report or portion thereof?
    Yes  o     No  þ
 
 
    If so, attach an explanation of the anticipated change, both narratively and quantitatively, and, if appropriate, state the reasons why a reasonable estimate of the results cannot be made.
 
 
La Jolla Pharmaceutical Company 
(Name of Registrant as Specified in Charter)
has caused this notification to be signed on its behalf by the undersigned hereunto duly authorized.
             
Date
  May 11, 2009   By   /s/ Gail A. Sloan