UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 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.

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

Commission file number: 000-26966

ADVANCED ENERGY INDUSTRIES, INC.

(Exact name of registrant as specified in its charter)

Delaware    (State or other jurisdiction of incorporation or organization)		84-0846841    (I.R.S. Employer Identification No.)
1625 Sharp Point Drive, Fort Collins, CO    (Address of principal executive offices)		80525    (Zip Code)

Registrant’s telephone number, including area code: (970) 221-4670

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   þ No   o

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   o No    o

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 the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer o		Accelerated filer þ		Non-accelerated filer o		Smaller reporting company o
				(Do not check if a smaller reporting company)

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes o No þ

As of May 4, 2011, there were 43,556,935 shares of the registrant’s Common Stock, par value $0.001 per share, outstanding.

 

 

EXPLANATORY NOTE

     This Amendment No. 1 (this “Amendment”) to the Quarterly Report on Form 10-Q for the quarter ended March 31, 2011 (the “Form 10-Q”) of Advanced Energy Industries, Inc. is being filed for the purpose of re-filing Exhibit 10.1 to the Form 10-Q in response to comments received from the Securities and Exchange Commission (the “SEC”) in connection with a pending request for confidential treatment of portions of such exhibit. In addition, as required by Rule 12b-15 under the Securities Exchange Act of 1934, as amended, new certifications by the registrant’s principal executive officer and principal financial officer are filed as exhibits hereto.

     No attempt has been made in this Amendment to modify or update the other disclosures presented in the Form 10-Q. This Amendment does not reflect events occurring after the filing of the Form 10-Q (i.e., occurring after May 6, 2011) or modify or update those disclosures that may be affected by subsequent events. Such subsequent matters are addressed in subsequent reports filed by the registrant with the SEC. Accordingly, this Amendment should be read in conjunction with the Form 10-Q and the registrant’s other filings with the SEC.

ITEM 6. EXHIBITS

10.1		Amendment to the Global Supply Agreement, dated as of January 28,2011, by and between Applied Materials, Inc. and Advanced Energy Industries, Inc. +
10.2		Amendment to Leadership Corporate Incentive Plan.*(1)
10.3		Executive Change in Control Agreement, dated as of January 1, 2011, by and between Advanced Energy Industries, Inc. and Gregg Patterson. (1)
31.1		Certification of the Chief Executive Officer Pursuant to Rule 13a-14(a) under the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. (1)
31.2		Certification of the Principal Financial Officer Pursuant to Rule 13a-14(a) under the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. (1)
31.3		Certification of the Chief Executive Officer Pursuant to Rule 13a-14(a) under the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.4		Certification of the Principal Financial Officer Pursuant to Rule 13a-14(a) under the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1		Certification of 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. (1)
32.2		Certification of the Principal Financial Officer Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. (1)

SIGNATURE

     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.

		ADVANCED ENERGY INDUSTRIES, INC.
Dated: July 5, 2011		/s/ Danny C. Herron   Danny C. Herron
		Executive Vice President & Chief Financial Officer