Schedule 13G/A

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13G

Under the Securities Exchange Act of 1934
(Amendment No. 5)*

Advanced Energy Industries, Inc.

(Name of Issuer)

Common Stock, $0.001 par value

(Title of Class of Securities)

007973 10 0

(CUSIP Number)

December 31, 2010

(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.		007973 10 0


1	NAMES OF REPORTING PERSONS Douglas S. Schatz & Jill E. Schatz Family Trust


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

	WYOMING

		5	SOLE VOTING POWER

NUMBER OF			3,821,484

SHARES		6	SHARED VOTING POWER
BENEFICIALLY
OWNED BY			245,168

EACH		7	SOLE DISPOSITIVE POWER
REPORTING
PERSON			3,821,484

WITH:		8	SHARED DISPOSITIVE POWER

			245,168

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

	4,066,652

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)

	9.4%

12	TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

	OO

Page 2 of 7 pages


CUSIP No.		007973 10 0


1	NAMES OF REPORTING PERSONS Douglas S. Schatz


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			4,049,184

SHARES		6	SHARED VOTING POWER
BENEFICIALLY
OWNED BY			245,168

EACH		7	SOLE DISPOSITIVE POWER
REPORTING
PERSON			4,049,184

WITH:		8	SHARED DISPOSITIVE POWER

			245,168

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

	4,294,352

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)

	9.9%

12	TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

	IN

Page 3 of 7 pages


CUSIP No.		007973 10 0


1	NAMES OF REPORTING PERSONS Jill E. Schatz


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			3,821,484

SHARES		6	SHARED VOTING POWER
BENEFICIALLY
OWNED BY			245,168

EACH		7	SOLE DISPOSITIVE POWER
REPORTING
PERSON			3,821,484

WITH:		8	SHARED DISPOSITIVE POWER

			245,168

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

	4,066,652

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)

	9.4%

12	TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

	IN

Page 4 of 7 pages


CUSIP No.		007973 10 0

Item 1.

	(a)		Name of Issuer

			Advanced Energy Industries, Inc.

	(b)		Address of Issuer’s Principal Executive Offices

1625 Sharp Point Drive
Fort Collins, CO 80525

Item 2.

	(a)		Name of Person Filing

			Douglas S. Schatz & Jill E. Schatz Family Trust Douglas S. Schatz Jill E. Schatz

	(b)		Address of Principal Business Office or, if none, Residence

			PO Box 481 Fort Collins, CO 80522

	(c)		Citizenship

			Douglas S. Schatz & Jill E. Schatz Family Trust — Wyoming Douglas S. Schatz — United States Jill E. Schatz — United States

	(d)		Title of Class of Securities

			Common Stock, $0.001 par value

	(e)		CUSIP Number

007973 10 0


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


Item 4.		Ownership.

Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1.

	(a)		Amount beneficially owned:

			Douglas S. Schatz & Jill E. Schatz Family Trust — 4,066,652 Douglas S. Schatz — 4,294,352 Jill E. Schatz —4,066,652

	(b)		Percent of class:

			Douglas S. Schatz & Jill E. Schatz Family Trust — 9.4% Douglas S. Schatz — 9.9% Jill E. Schatz — 9.4%

Page 5 of 7 pages


CUSIP No.		007973 10 0

(c)

Number of shares as to which the person has:

Douglas S. Schatz & Jill E. Schatz Family Trust:
(i) Sole power to vote or to direct the vote: 3,821,484

(ii)Shared power to vote or to direct the vote: 245,168

(iii)Sole power to dispose or to direct the disposition of: 3,821,484

(iv)Shared power to dispose or to direct the disposition of: 245,168

Douglas S. Schatz:
(i) Sole power to vote or to direct the vote: 4,049,184

(ii)Shared power to vote or to direct the vote: 245,168

(iii)Sole power to dispose or to direct the disposition of: 4,049,184

(iv)Shared power to dispose or to direct the disposition of: 245,168

Jill E. Schatz:
(i) Sole power to vote or to direct the vote: 3,821,484

(ii) Shared power to vote or to direct the vote: 245,168

(iii) Sole power to dispose or to direct the disposition of: 3,821,484

(iv) Shared power to dispose or to direct the disposition of: 245,168


*		Mr. and Mrs. Schatz are trustees of a charitable foundation that is the record holder of 245,168 shares of common stock of the issuer. The two other trustees of the charitable foundation are members of Mr. and Mrs. Schatz’s immediate family. Accordingly, Mr. Schatz and Mrs. Schatz may be deemed to share with the other trustees voting and dispositive power with respect to the charitable foundation’s 245,168 shares. Mr. and Mrs. Schatz disclaim beneficial ownership of the shares held by the charitable foundation.


Item 5.		Ownership of Five Percent or Less of a Class

Not applicable.


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

Not applicable.


Item 8.		Identification and Classification of Members of the Group

Not applicable.


Item 9.		Notice of Dissolution of Group

Not applicable.


Item 10.		Certification

Not applicable.

Page 6 of 7 pages


CUSIP No.		007973 10 0

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.


Date: February 14, 2011	DOUGLAS S. SCHATZ & JILL E. SCHATZ FAMILY TRUST
	By:	/s/ Douglas S. Schatz
		Douglas S. Schatz, Trustee



	By:	/s/ Jill E. Schatz
		Jill E. Schatz, Trustee



	By:	/s/ Douglas S. Schatz
		Douglas S. Schatz



	By:	/s/ Jill E. Schatz
		Jill E. Schatz

Page 7 of 7 pages