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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

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

ADVANCED ENERGY INDUSTRIES, INC.
(Name of Issuer)

Common Stock, $0.001 par value
(Title of Class of Securities)

007973 10 0
(CUSIP Number)

Check the following box if a fee is being paid with this statement / /. (A fee is not required only if the filing person: (1) has a previous statement on file reporting beneficial ownership of more than five percent of the class of securities described in Item 1; and (2) has filed no amendment subsequent thereto reporting beneficial ownership of five percent or less of such class.)
(See Rule 13d-7.)

*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 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).

(Continued on following page(s))

Page 1 of 5

CUSIP No. 007973 10 0                 13G                 Page 2 of 5 Pages
          -----------                                         ---  ---

- -------------------------------------------------------------------------------
 (1) Names of Reporting Persons.
     S.S. or I.R.S. Identification Nos. of Above Persons

     Douglas S. Schatz
- -------------------------------------------------------------------------------
 (2) Check the Appropriate Box if a Member of a Group*                (a)  / /
                                                                      (b)  / /
- -------------------------------------------------------------------------------
 (3) SEC Use Only

- -------------------------------------------------------------------------------
 (4) Citizenship or Place of Organization

     United States
- -------------------------------------------------------------------------------
Number of Shares              (5) Sole Voting Power
 Beneficially                        13,162,300 shares
 Owned by                    --------------------------------------------------
 Each Reporting               (6) Shared Voting Power
 Person With                         0 shares
                             --------------------------------------------------
                              (7) Sole Dispositive Power
                                     13,162,300 shares
                             --------------------------------------------------
                              (8) Shared Dispositive Power
                                     0 shares
- -------------------------------------------------------------------------------
 (9) Aggregate Amount Beneficially Owned by Each Reporting Person
          13,162,300 shares
- -------------------------------------------------------------------------------
(10) Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares*

- -------------------------------------------------------------------------------
(11) Percent of Class Represented by Amount in Row (9)
          61.9%
- -------------------------------------------------------------------------------
(12) Type of Reporting Person*
          IN
- -------------------------------------------------------------------------------
                    *SEE INSTRUCTION BEFORE FILLING OUT!


ITEM 1(A). NAME OF ISSUER

ADVANCED ENERGY INDUSTRIES, INC.

ITEM 1(B). ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES

ADVANCED ENERGY INDUSTRIES, INC.
1625 SHARP POINT DRIVE
FORT COLLINS, CO 80525

ITEM 2(A). NAME OF PERSON(S) FILING

DOUGLAS S. SCHATZ

ITEM 2(B). ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE

ADVANCED ENERGY INDUSTRIES, INC.
1625 SHARP POINT DRIVE
FORT COLLINS, CO 80525

ITEM 2(C). CITIZENSHIP

DOUGLAS S. SCHATZ IS A CITIZEN OF THE UNITED STATES

ITEM 2(D). TITLE OF CLASS OF SECURITIES

COMMON STOCK, $0.001 PAR VALUE

ITEM 2(E). CUSIP NUMBER

007973 10 0

ITEM 3. IF THIS STATEMENT IS FILED PURSUANT TO RULES 13d-1(b), OR 13d-2(b), CHECK WHETHER THE PERSON FILING IS A

Not applicable

ITEM 4. OWNERSHIP
(a) AMOUNT BENEFICIALLY OWNED:
13,162,300 shares

(b) PERCENT OF CLASS 61.9%

Page 3 of 5

(c) Number of shares as to which such person has:

(i) sole power to vote or to direct the vote

13,162,300 shares

(ii) shared power to vote or to direct the vote

0 shares

(iii) sole power to dispose or to direct the disposition of

13,162,300 shares

(iv) shared power to dispose or to direct the disposition of

0 shares

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 4 of 5

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.

/s/ DOUGLAS S. SCHATZ
----------------------------------------
    Douglas S. Schatz

Page 5 of 5