<PAGE>   1

                     U.S. SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                   FORM 10-QSB

(Mark One)

         [x]    QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934

                For the quarterly period ended December 31, 2000

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

        For the transition period from _______________ to _______________

                        Commission File Number 2-95626-D

                               SIONIX CORPORATION
--------------------------------------------------------------------------------
        (Exact name of small business issuer as specified in its charter)


                   Utah                                    87-0428526
        State or other jurisdiction                      (IRS Employer
     of incorporation or organization)                 Identification No.)


                 7282 Jeronimo Road, Suite 108, Irvine, CA 92618
--------------------------------------------------------------------------------
                    (Address of principal executive offices)


                                  949 454-9283
                               -------------------
                           (Issuer's telephone number)


                                 Not Applicable
--------------------------------------------------------------------------------
              (Former name, former address and former fiscal year,
                          if changed since last report)


         Check whether the issuer (1) filed all reports required to be filed by
Section 13 or 15(d) of the Exchange Act of 1934 during the past 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 [X]             No [ ]

As of December 31, 2000, the Company had 54,166,322 shares of its $.001 par
value common stock issued and outstanding.

Transitional Small Business Disclosure Format (check one):

                              Yes [ ]             No [X]

<PAGE>   2

                                      INDEX


PART I    FINANCIAL INFORMATION

Item 1. Financial Statements                                               Page

        Condensed Balance Sheet at December 31, 2000 (unaudited)            3

        Condensed Statements of Operations for the Three Months
          Ended December 31, 2000 and December 31, 1999 (unaudited)         4

        Condensed Statements of Cash Flows for the Three
          Months Ended December 31, 2000 and December
          31, 1999 (unaudited)                                              5

        Notes to Condensed Financial Statements (unaudited)                 6

Item 2. Management's Discussion and Analysis or Plan of Operation           7

PART II   OTHER INFORMATION

Item 1. Legal Proceedings                                                   8

Item 2. Changes in Securities and Use of Proceeds                           9

Item 3. Defaults Upon Senior Securities                                     9

Item 4. Submission of Matters to a Vote of Security Holders                 9

Item 5. Other Information                                                   9

Item 6. Exhibits and Reports on Form 8-K                                   10

Signatures                                                                 10


                                        2

<PAGE>   3

                               SIONIX CORPORATION
                          (A DEVELOPMENT STAGE COMPANY)
                             CONDENSED BALANCE SHEET
                                   (UNAUDITED)

<TABLE>
<CAPTION>
                                                                  DECEMBER 31,
                                                                      2000
                                                                  -----------
<S>                                                               <C>

                       ASSETS
CURRENT ASSETS:
  Cash                                                            $    21,180
  Restricted cash                                                     105,189
                                                                  -----------
    Total current assets                                              126,369

  Equipment, net                                                       37,934
  Patents, net                                                         92,490
  Deposits                                                              6,831
                                                                  -----------
                                                                  $   263,624
                                                                  ===========

       LIABILITIES AND STOCKHOLDERS' DEFICIT

CURRENT LIABILITIES:
  Note payable                                                    $   302,351
  Accounts payable and accrued expenses                               186,644
  Notes payable to affiliates                                          50,000
                                                                  -----------
    Total current liabilities                                         538,995
                                                                  -----------

COMMITMENTS                                                                --

STOCKHOLDERS' DEFICIT:
  Common stock $0.001 par value; 100,000,000 shares authorized,
    54,166,322 shares issued and outstanding                           54,166
  Additional paid-in capital                                        8,104,350
  Deficit accumulated during the development stage                 (8,433,887)
                                                                  -----------
    Total stockholders' deficit                                      (275,371)
                                                                  -----------
                                                                  $   263,624
                                                                  -----------
</TABLE>

   The accompanying notes are an integral part of these financial statements


                                       3

<PAGE>   4

                               SIONIX CORPORATION
                          (A DEVELOPMENT STAGE COMPANY)
                       CONDENSED STATEMENTS OF OPERATIONS
                                   (UNAUDITED)

<TABLE>
<CAPTION>
                                                                          CUMULATIVE
                                              THREE MONTHS ENDED        FROM INCEPTION
                                                 DECEMBER 31,          (OCTOBER 3, 1994)
                                        -----------------------------    TO DECEMBER 31,
                                            2000             1999            2000
                                        ------------     ------------  -----------------
<S>                                     <C>              <C>           <C>

COSTS AND EXPENSES:
  Administrative and marketing          $    209,874     $    146,264     $ 5,597,263
  Research and development                    41,398           16,664       2,175,622
  Depreciation and amortization                9,924           13,292         494,961
                                        ------------     ------------     -----------
OPERATING LOSS                              (261,196)        (176,220)     (8,267,846)

OTHER INCOME (EXPENSE):
  Interest income                              3,112            1,691          35,835
  Interest expense                            (7,052)          (7,584)       (201,876)
                                        ------------     ------------     -----------
                                              (3,940)          (5,893)       (166,041)
                                        ------------     ------------     -----------
NET LOSS                                $   (265,136)    $   (182,113)    $(8,433,887)
                                        ============     ============     ===========

BASIC AND DILUTED NET LOSS PER SHARE    $      (0.00)    $      (0.01)
                                        ------------     ------------
BASIC AND DILUTED WEIGHTED AVERAGE
 NUMBER OF SHARES OUTSTANDING             54,166,322       34,899,700
                                        ============     ============
</TABLE>

   The accompanying notes are an integral part of these financial statements


                                       4

<PAGE>   5

                               SIONIX CORPORATION
                          (A DEVELOPMENT STAGE COMPANY)
                       CONDENSED STATEMENTS OF CASH FLOWS
                                   (UNAUDITED)

<TABLE>
<CAPTION>
                                                                 THREE MONTHS ENDED              CUMULATIVE
                                                                     DECEMBER 31,              FROM INCEPTION
                                                             ---------------------------      (OCTOBER 3, 1994)
                                                                2000            1999         TO DECEMBER 31, 2000
                                                             -----------     -----------     --------------------
<S>                                                          <C>             <C>             <C>

CASH FLOWS FROM OPERATING ACTIVITIES:
   Net loss                                                  $  (265,136)    $  (182,113)       $(8,433,887)
   Adjustments to reconcile net loss to net cash
      used by operating activities:
      Depreciation                                                 9,925          13,292            150,726
      Common stock issued for compensation                                        52,910          1,833,041
      Common stock issued for legal services                                                        663,293
      Common stock issued for consulting services                                                   111,360
      Write-down of obsolete assets                                                                  38,862
      Write-down of intangable assets                                                             1,185,475
      Other                                                                                          76,872
      Gain on settlement of debt                                                                    (19,522)
   Change in assets and liabilities:                                                                     --
      Other assets                                                                                       --
      Marketable securities                                       (5,189)                          (105,189)
      Deposits                                                                     1,164             (6,831)
      Accounts payable and accrued expenses                       37,625          (3,632)           186,644
                                                             -----------     -----------        -----------

         Net cash used by operating activities                  (222,775)       (118,379)        (4,278,864)
                                                             -----------     -----------        -----------

CASH FLOWS FROM INVESTING ACTIVITIES:
  Purchase of patents                                                 --              --           (135,033)
  Purchase of equipment                                          (11,044)        (23,535)          (225,271)
                                                             -----------     -----------        -----------

         Net cash used by investing activities                   (11,044)        (23,535)          (360,304)
                                                             -----------     -----------        -----------

CASH FLOWS FROM FINANCING ACTIVITIES:
  Payments of notes                                              (25,000)                           (43,422)
  Issuance of common stock for cash                                              122,600          4,307,997
  Proceeds from issuance of notes                                                                   395,773
                                                             -----------     -----------        -----------

         Net cash provided by (used in)
           financing activities                                  (25,000)        122,600          4,660,348
                                                             -----------     -----------        -----------

Net (decrease) increase in cash                                 (258,819)        (19,314)            21,180

CASH, BEGINNING OF PERIOD                                        279,999         184,461                 --
                                                             -----------     -----------        -----------

CASH, END OF PERIOD                                          $    21,180     $   165,147        $    21,180
                                                             ===========     ===========        ===========

SUPPLEMENTAL DISCLOSURES OF NON-CASH
  INVESTING AND FINANCING ACTIVITIES:
     Acquisition of intangibles for debt                     $        --     $        --        $1,185,475
     Conversion of debt to equity                            $        --     $        --        $1,165,953

Cash paid for:
  Interest                                                   $        --     $     4,000        $    6,134
  Income taxes                                               $        --     $        --        $       --
</TABLE>

   The accompanying notes are an integral part of these financial statements



                                       5

<PAGE>   6

                            SIONIX CORPORATION, INC.
                         (A DEVELOPMENT STAGE COMPANY)
                    NOTES TO UNAUDITED FINANCIAL STATEMENTS
                               DECEMBER 31, 2000


1.    BASIS OF PRESENTATION

      The accompanying unaudited financial statements of Sionix Corporation (the
      "Company") have been prepared in accordance with generally accepted
      accounting principles for interim financial information. Accordingly, they
      do not include all of the information required by generally accepted
      accounting principles for complete financial statements. In the opinion of
      management, all adjustments (consisting of normal recurring adjustments)
      considered necessary for a fair presentation have been included. Operating
      results for the three months ended December 31, 2000 are not necessarily
      indicative of the results for any future period. These statements should
      be read in conjunction with the Company's audited financial statements and
      notes thereto for the year ended September 30, 2000.

2.    RECLASSIFICATIONS

      Certain prior year amounts have been reclassified to conform to the fiscal
      year 2001 presentation.


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<PAGE>   7

Item 2.   Management's Discussion and Analysis or Plan of Operation

General.

        As of December 31, 2000, the Company had an accumulated deficit of
$8,433,887. It can be expected that the future operating results will continue
to be subject to many of the problems, expenses, delays and risks inherent in
the establishment of a new business enterprise, many of which the Company cannot
control.

        The Company has formulated its business plans and strategies based on
certain assumptions of the Company's management regarding the size of the market
for the products the Company will be able to offer, the Company's anticipated
share of the market, and the estimated prices for and acceptance of the
Company's products. Although these plans and assumptions are based on the best
estimates of management, there can be no assurance that these assessments will
prove to be correct. No independent marketing studies have been conducted on
behalf of or otherwise obtained by the Company, nor are any such studies
planned. Any future success that the Company might enjoy will depend upon many
factors, including factors which may be beyond the control of the Company or
which cannot be predicted at this time. These factors may include product
obsolescence, increased levels of competition, including the entry of additional
competitors and increased success by existing competitors, changes in general
economic conditions, increases in operating costs including cost of supplies,
personnel and equipment, reduced margins caused by competitive pressures and
other factors, and changes in governmental regulation imposed under federal,
state or local laws.

        The Company's operating results may vary significantly due to a variety
of factors, including changing customers profiles, the availability and cost of
raw materials, the introduction of new products by the Company or its
competitors, the timing of the Company's advertising and promotional campaigns,
pricing pressures, general economic and industry conditions that affect customer
demand, and other factors.

        Results of Operations (Three Months Ended December 31, 2000 Compared to
Three Months Ended December 31, 1999). During the first quarter of the 2001
fiscal year the focus of the Company's efforts has been on working with
Hoffinger Industries, its joint venture partner, to prepare for manufacturing
and distribution of its products, as well as final quality control issues. The
immediate focus is on the DAF (Dissolved Air Flotation), Automatic Back-Flush
Filtration System, O-Zone Mixing Chamber and other related products, some of
which have their own separate markets.

        The Company is also previewing its products with experienced treatment
plant managers and certified operators to gauge their level of acceptance. Also,
the Company has been exploring new business initiatives in water-related
industries.


                                       7

<PAGE>   8

        For the three months ended December 31, 2000, the Company reported a
loss of $265,136, or $.00 per share. This compares with a loss of $182,113, or
$.01 per share, for the three months ended December 31, 1999. The increase in
the loss is principally due to increased research and development costs and
marketing expense.

        Liquidity and Capital Resources. On December 31, 2000, the Company had
cash and cash equivalents of approximately $126,369. The principal source of
liquidity has been sales of securities. Management anticipates that additional
capital will be required to finance the Company's operations. The Company
believes that anticipated proceeds from sales of securities, plus expected cash
flow from operations towards the end of the fiscal year, will be sufficient to
finance the Company's operations at currently anticipated levels for a period of
at least twelve months. However, there can be no assurance that the Company will
not encounter unforeseen difficulties that may deplete its capital resources
more rapidly than anticipated. Also, the Company may not be able to generate
revenues from operations during the fiscal year.


PART II - OTHER INFORMATION

Item 1. Legal Proceedings

        In June 1999 the Company filed an action against Jack Moorehead,
Dascore, LLC, S. Donna Friedman and certain others in the U.S. District Court
for the Southern District of California (Case No. 99-cv-1201-K-LSP). Moorehead
is the former President of the Company, and Dascore LLC is an entity controlled
by him and in a business related to that of the Company. S. Donna Friedman is a
former officer and director of the Company.

        The Complaint alleges, among other things, that the defendants have
infringed and continue to infringe on certain patents owned by the Company, and
that they are familiar with the Company's intellectual property through their
past positions with the Company. The Complaint also alleges that the defendants
have sold or attempted to sell technology owned by the Company and covered by
the Company's patents, and that the defendants are unfairly competing with the
Company by exploiting its technology without payment. In addition, the action
includes claims of false advertising, in that the defendants are falsely
representing that they own the technology; interference with economic relations
and interference with prospective advantage, relating to the effect that the
defendants' conduct has had on the Company's dealings with third parties; and
misappropriation of trade secrets learned by the defendants while associated
with the Company. The complaint further alleges that the defendants conspired to
convert technology, money and equipment owned by the Company, and used Company
funds to pay personal expenses. Finally, the complaint alleges that Moorehead
and Friedman defrauded the Company and breached their fiduciary duties to the
Company in connection with their departure from the Company and their retention
of property of the Company.


                                       8

<PAGE>   9

        In February of 1999, the United States District Court issued a
preliminary injunction enjoining defendants from selling or transferring in
excess of 10,000,000 shares of stock held by them. The defendants have twice
sought to have that injunction modified or dissolved and both such attempts were
unsuccessful.

        The defendants have filed a cross-complaint against the Company based on
a breach of contract cause of action and to collect loans allegedly made by them
to the Company. The case is currently in the discovery stage.

        The Company has filed an action for professional negligence,
malpractice, breach of fiduciary duty and breach of contract against Gilliam,
Duncan & Harms, its previous patent counsel (San Diego County Superior Court,
Case No. GIC 754391), and a separate action against Wenthur & Chachas, its
previous corporate counsel, and the individual attorneys in those firms (San
Diego County Superior Court Case No. GIC 747267). The action against the patent
attorneys alleges that the patent attorneys represented the Company and
Moorehead contemporaneously and failed to advise the corporation of the inherent
conflict of interest in representing both parties. The action further alleges
the patent attorneys aided Moorehead and others in misappropriating the
Company's intellectual property and trade secrets. The action seeks monetary
damages, attorneys fees and interest. The action against the former corporate
counsel seeks damages arising out of their alleged creation of false documents
to defraud the corporation with respect to certain intellectual property rights
and securities transactions. Both actions are in the discovery stage.

        The Company is the defendant in an action, Barnett v. Sionix
Corporation, pending in Orange County Superior Court, (Case No. 00CC05463). The
complaint seeks repayment of approximately $150,000 in alleged loans by the
plaintiff, who is the mother-in-law of the former Chief Executive Officer of the
Company, Michael Taylor. The Company has cross-complained against the plaintiff
and Mr. Taylor for breach of fiduciary duty relating to the alleged loans.

Item 2. Changes in Securities and Use of Proceeds

        None.

Item 3. Defaults Upon Senior Securities

        None.

Item 4. Submission of Matters to a Vote of Security Holders

        None.

Item 5. Other Information

        Not applicable.


                                       9

<PAGE>   10

Item 6. Exhibits and Reports on Form 8-K

        Exhibits

        None

        Reports on Form 8-K

        Not applicable.


                                   SIGNATURES

      In accordance with the requirements of the Exchange Act, the registrant
caused this report to be signed on its behalf by the undersigned, thereunto duly
authorized.

                                        SIONIX CORPORATION


Dated: February 14, 2001                By: /s/ James J. Houtz
                                            ------------------------------------
                                            James J. Houtz , President


                                        By: /s/ Robert McCray
                                            ------------------------------------
                                            Robert McCray, Chief Financial
                                            Officer

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