SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549

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                                   FORM 8-K

                                CURRENT REPORT

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


      Date of Report (Date of earliest event reported): December 5, 2007

                            ZOLTEK COMPANIES, INC.
            (Exact name of registrant as specified in its charter)


   MISSOURI                         0-20600                       43-1311101
(State or other                (Commission File                (I.R.S. Employer
jurisdiction of                     Number)                     Identification
 organization)                                                      Number)


3101 MCKELVEY ROAD
ST. LOUIS, MISSOURI                                                  63044
(Address of principal executive offices)                           (Zip Code)

                                (314) 291-5110
             (Registrant's telephone number, including area code)

                                NOT APPLICABLE
         (Former name or former address if changed since last report)

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Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the Registrant under any of
the following provisions:

[ ]  Written communications pursuant to Rule 425 under the Securities Act
     (17 CFR 230.425)

[ ]  Soliciting material pursuant to Rule 14a-12 under the Exchange Act
     (17 CFR 240.14a-12)

[ ]  Pre-commencement communications pursuant to Rule 14d-2(b) under the
     Exchange Act (17 CFR 240.14d-2(b))

[ ]  Pre-commencement communications pursuant to Rule 13e-4(c) under the
     Exchange Act (17 CFR 240.13e-4(c))


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ITEM 7.01.  REGULATION FD DISCLOSURE.

            On December 5, 2007, executives of the Registrant made a
presentation at a Think Equity Conference held in San Francisco, California
using the slides and information included as Exhibit 99 to this Current Report
on Form 8-K. The Registrant undertakes no duty or obligation to update or
revise this information in the future. The presentation materials will also be
made available on the Registrant's website, www.zoltek.com.

            The information in this Current Report on Form 8-K and the exhibit
attached hereto shall not be deemed "filed" for purposes of Section 18 of the
Securities Exchange Act of 1934, as amended, or otherwise subject to the
liabilities of that section, unless the Registrant specifically incorporates
it by reference in a document filed under the Securities Act of 1933 or
Securities Exchange Act of 1934. By furnishing this information on Form 8-K,
the Registrant makes no admission as to the materiality of any information in
this report that is required to be disclosed solely by reason of Regulation
FD.

ITEM 9.01.  FINANCIAL STATEMENTS AND EXHIBITS.

            (a) Financial statements of businesses acquired. Not applicable.
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            (b) Pro forma financial information. Not applicable.
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            (c) Exhibits. See Exhibit Index.
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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.

Dated: December 11, 2007

                                            ZOLTEK COMPANIES, INC.



                                            By    /s/ Kevin Schott
                                               -------------------------------
                                                Kevin Schott
                                                Chief Financial Officer


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                                 EXHIBIT INDEX
Exhibit
Number                            Description
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 99              Presentation materials, dated December 5, 2007.





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