UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC  20549

________________

FORM 10-Q/A

Amendment No. 1

QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended: March 31, 2011

Commission file number: 1-10827

PAR PHARMACEUTICAL COMPANIES, INC.

(Exact name of registrant as specified in its charter)

Delaware	22-3122182
(State or other jurisdiction of	(I.R.S. Employer
incorporation or organization)	Identification No.)

300 Tice Boulevard, Woodcliff Lake, New Jersey 07677

(Address of principal executive offices)

Registrant’s telephone number, including area code:  (201) 802-4000

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.  Yes  X  No___     

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 (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes  X  No___     

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

Large accelerated filer [ X ]    

Accelerated filer [   ]   

Non-accelerated filer [   ]

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

Yes        No  X_

Number of shares of the Registrant’s common stock outstanding as of April 27, 2011: 36,208,861

TABLE OF CONTENTS

PAR PHARMACEUTICAL COMPANIES, INC.

FORM 10-Q/A

FOR THE QUARTER ENDED MARCH 31, 2011

PAGE

Explanatory Note

   3

PART II

OTHER INFORMATION

Item 6.   

Exhibits

4

5

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Explanatory Note

The purpose of this amendment to our Quarterly Report on Form 10-Q (the “Form 10-Q”) for the quarter ended March 31, 2011 is solely to furnish Exhibit 101 to the Form 10-Q, which provides certain items from our Form 10−Q formatted in eXtensible Business Reporting Language (“XBRL”) that were inadvertently omitted.  No other changes have been made to the Form 10−Q as originally filed, and this amendment does not otherwise reflect events occurring after the original filing of the Form 10-Q.

Pursuant to Rule 406T of Regulation S-T, the Interactive Data Files on Exhibit 101 hereto are deemed not filed or part of a registration statement or prospectus for purposes of Section 11 or 12 of the Securities Act of 1933, as amended, are deemed not filed for purposes of Section 18 of the Securities and Exchange Act of 1934, as amended, and otherwise are not subject to liability under those sections.

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ITEM 6.  EXHIBITS

31.1

Certification of the Principal Executive Officer – previously filed on May 5, 2011 as an exhibit to our Quarterly Report on Form 10-Q for the quarter ended March 31, 2011 and incorporated herein by reference.

31.2

Certification of the Principal Financial Officer – previously filed on May 5, 2011 as an exhibit to our Quarterly Report on Form 10-Q for the quarter ended March 31, 2011 and incorporated herein by reference.

32.1

Certification by the Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 – previously furnished on May 5, 2011 as an exhibit to our Quarterly Report on Form 10-Q for the quarter ended March 31, 2011 and incorporated herein by reference.

32.2

Certification by the Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 – previously furnished on May 5, 2011 as an exhibit to our Quarterly Report on Form 10-Q for the quarter ended March 31, 2011 and incorporated herein by reference.

101

The following financial statements and notes from the Par Pharmaceutical Companies, Inc. Quarterly Report on Form 10-Q for the three months ended March 31, 2011, filed on May 5, 2011, formatted in eXtensible Business Reporting Language (XBRL): (i) condensed consolidated balance sheets, (ii) condensed consolidated statements of operations, (iii) condensed consolidated statements of cash flows, and (iv) the notes to the condensed consolidated financial statements.

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SIGNATURES

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

PAR PHARMACEUTICAL COMPANIES, INC.

  (Registrant)

Date:  May 5, 2011

/s/ Michael A. Tropiano                                                      

Michael A. Tropiano

Executive Vice President and Chief Financial Officer

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EXHIBIT INDEX

Exhibit Number

Description

31.1

Certification of the Principal Executive Officer – previously filed on May 5, 2011 as an exhibit to our Quarterly Report on Form 10-Q for the quarter ended March 31, 2011 and incorporated herein by reference.

31.2

Certification of the Principal Financial Officer – previously filed on May 5, 2011 as an exhibit to our Quarterly Report on Form 10-Q for the quarter ended March 31, 2011 and incorporated herein by reference.

32.1

Certification by the Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 – previously furnished on May 5, 2011 as an exhibit to our Quarterly Report on Form 10-Q for the quarter ended March 31, 2011 and incorporated herein by reference.

32.2

Certification by the Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 – previously furnished on May 5, 2011 as an exhibit to our Quarterly Report on Form 10-Q for the quarter ended March 31, 2011 and incorporated herein by reference.

101

The following financial statements and notes from the Par Pharmaceutical Companies, Inc. Quarterly Report on Form 10-Q for the three months ended March 31, 2011, filed on May 5, 2011, formatted in eXtensible Business Reporting Language (XBRL) are furnished: (i) condensed consolidated balance sheets, (ii) condensed consolidated statements of operations, (iii) condensed consolidated statements of cash flows, and (iv) the notes to the condensed consolidated financial statements.