La Jolla Pharmaceutical (LJPC) 10-Q/A 2011 Q2 Quarterly report (amended)

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 10-Q/A

(Amendment No. 1)

(Mark One)

þ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15 (d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2011

OR

o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 (d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from                    to                    

Commission file number: 0-24274

LA JOLLA PHARMACEUTICAL COMPANY

(Exact name of registrant as specified in its charter)

Delaware	33-0361285
(State or other jurisdiction of	(I.R.S. Employer
incorporation or organization)	Identification No.)
4370 La Jolla Village Drive, Suite 400
San Diego, CA	92122
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code: (858) 452-6600

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.Yesþ Noo

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).Yesþ Noo

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company. See definition of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filero Accelerated filero Non-accelerated filero Smaller reporting companyþ

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).Yeso Noþ

The number of shares of the registrant’s common stock, $0.0001 par value per share, outstanding at August 9, 2011 was 54,105,981.

TABLE OF CONTENTS

	ITEM 6. EXHIBITS
SIGNATURES
EX-101 INSTANCE DOCUMENT
EX-101 SCHEMA DOCUMENT
EX-101 CALCULATION LINKBASE DOCUMENT
EX-101 LABELS LINKBASE DOCUMENT
EX-101 PRESENTATION LINKBASE DOCUMENT

Explanatory Note

The sole purpose of this amendment to our Quarterly Report on Form 10-Q for the period ended June 30, 2011, filed with the Securities and Exchange Commission (the “SEC”) on August 15, 2011 (the “Form 10-Q”), is to furnish Exhibit 101 to that Form 10-Q which contains the XBRL (eXtensible Business Reporting Language) Interactive Data File for the financial statements and notes included in Part I, Item 1 of the Form 10-Q. As permitted by Rule 405(a)(2)(ii) of Regulation S-T, Exhibit 101 was required to be furnished by amendment within 30 days of the original filing date of the Form 10-Q.

No other changes have been made to the Form 10-Q and the Form 10-Q has not been updated to reflect events that may have occurred subsequent to the original filing date.

Pursuant to Rule 406T of Regulation S-T, the interactive data files contained in Exhibit 101 are not deemed filed or part of a registration statement or prospectus for purposes of Sections 11 or 12 of the Securities Act of 1933, as amended, are deemed not filed for purposes of Section 18 of the Securities Act of 1934, as amended, and otherwise are not subject to liability under these sections.

ITEM 6. EXHIBITS

Exhibit
Number		Description
	31.1	Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 (1)
	31.2	Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 (1)
	32.1	Certification Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (1)
101.INS		XBRL Instance Document
101.SCH		XBRL Taxonomy Extension Schema Document
101.CAL		XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF		XBRL Taxonomy Extension Definition Linkbase Document
101.LAB		XBRL Taxonomy Extension Label Linkbase Document
101.PRE		XBRL Taxonomy Extension Presentation Linkbase Document

(1) Previously filed or furnished, as applicable, as an exhibit to the Company’s Quarterly Report on Form 10-Q for the period ended June 30, 2011 filed with the SEC on August 15, 2011.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	La Jolla Pharmaceutical Company
Date: September 12, 2011	/s/ Deirdre Y. Gillespie
	Deirdre Y. Gillespie, M.D.
	President and Chief Executive Officer (On behalf of the Registrant)
	/s/ Gail A. Sloan
	Gail A. Sloan
	Chief Financial Officer and Secretary (As Principal Financial and Accounting Officer)

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