Exhibit 99
[ZOLTEK logo]
FOR IMMEDIATE RELEASE
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           ZOLTEK PROVIDES GUIDANCE REGARDING SECOND QUARTER RESULTS
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         ST. LOUIS, MISSOURI -- April 15, 2008 -- Zoltek Companies, Inc.
(Nasdaq: ZOLT) today announced that it expects to report revenues of
approximately $50 million in the quarter ended March 31, 2008, reflecting
growth from $40.1 million reported in the quarter ended December 31, 2007 and
from $36.7 million in the quarter ended March 31, 2007.

         Zsolt Rumy, Zoltek's Chairman and CEO said, "Although we typically do
not pre-announce results, we believe that it was prudent to do so today in
light of the recent volatility in the market price of our stock. We are
pleased with our results in the March 2008 quarter, which reflect a return to
more normalized customer order patterns for carbon fibers and technical fibers
and production from new carbon fiber lines at our Hungarian facility started
up since the beginning of the current fiscal year. We expect that our profit
margins will be consistent with our profitability in recent periods."

         Zoltek expects to announce complete results for the second quarter
and year-to-date on or before May 12th.

                       FOR FURTHER INFORMATION CONTACT:
                     ZSOLT RUMY, CEO OR KEVIN SCHOTT, CFO
                              3101 MCKELVEY ROAD
                              ST. LOUIS, MO 63044
                                (314) 291-5110

This press release contains statements that are based on the current
expectations of our company. You are cautioned that any such forward-looking
statements are not guarantees of future performance and involve risks and
uncertainties, and that actual results may differ materially from those
projected in the forward-looking statements as a result of various factors.
The factors that might cause such differences include, among others, our
ability to: (1) successfully resolve pending litigation; (2) continue to
improve efficiency at our manufacturing facilities on a timely and
cost-effective basis to meet current order levels of carbon fibers; (3)
successfully add new planned capacity for the production of carbon fiber and
precursor raw materials and meet our obligations under long-term supply
agreements; (4) achieve profitable operations; (5) raise new capital and
increase our borrowing at acceptable costs; (6) manage changes in customers'
forecasted requirements for our products; (7) continue investing in
application and market development in a range of industries; (8) manufacture
low-cost carbon fibers and profitably market them; (9) penetrate existing,
identified and emerging markets; (10) successfully retrofit our recently
acquired Mexican facility to manufacture acrylic fiber precursor and add
carbon fiber production lines, (11) finalize our financial statements for the
quarter and year-to-date periods ended March 31, 2008, and (12) manage the
risks identified under "Risk Factors" in our filings with the SEC.