----

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| þ | ANNUAL REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 |
|--------|--------------------------------------------------------------------------------|

| o | TRANSITION REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 |
|---|------------------------------------------------------------------------------------|

| Nevada                            |   | 87-0428526                           |
|-----------------------------------|--------|--------------------------------------|
| (State or other jurisdiction      |   | (I.R.S. Employer Identification No.) |
| of incorporation or organization) |   |                                 |

| Title of each class |   | Name of each exchange on which each is registered |
|---------------------|--------|---------------------------------------------------|
| N/A                 |   |                                              |

| Large accelerated filer                                                  |  o | Accelerated filer         |  o      |
|--------------------------------------------------------------------------|---------|---------------------------|--------------|
| Non-accelerated filer (Do not check if a smaller reporting company) |  o | Smaller reporting company |  þ |

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| Name             |   | Age    |   | Position                                        |   | Director Since |
|------------------|--------|--------|--------|-------------------------------------------------|--------|----------------|
|             |   |   |   |                                            |   |           |
| James R. Currier |   | 64     |   | Chief Executive Officer and Chairman            |   | December, 2009 |
| David R. Wells   |   | 48     |   | President, Chief Financial Officer and Director |   | December, 2009 |
| James Alexander  |   | 70     |   | Director                                        |   | March, 2009    |
| Frank Power      |   | 59     |   | Director                                        |   | March, 2009    |
| William A. Retz  |   | 70     |   | Director                                        |   | June, 2010     |
| Johan Perslow    |   | 67     |   | Director                                        |   | June, 2010     |

----

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| Name                   |   | Year     |   | Fees Earnedor Paid inCash |     |   | StockAwards |   |      | Warrant/OptionAwards |   |   | Non-EquityIncentive PlanCompensation |   |   | Non-QualifiedDeferredCompensation |      |   | Other  |   |      | Total  |   |
|------------------------|--------|----------|--------|------------------------------------------|----------|--------|-------------|--------|-----------|----------------------|--------|--------|-------------------------------------------|--------|--------|-----------------------------------|-----------|--------|--------|--------|-----------|--------|--------|
|                   |   |     |   |                                     |     |   |        |   |      |                 |   |   |                                      |   |   |                              |      |   |   |   |      |   |   |
| James R. Currier  |   | 20102009 |   |                                     | --       |   |        |   | --        |                 |   |   | --                                        |   |   |                              | --        |   |   |   | --        |   |   |   | -- |   |   |   | -- | (1) |
| David R. Wells    |   | 20102009 |   |                                     | --       |   |        |   | --        |                 |   |   | --                                        |   |   |                              | --        |   |   |   | --        |   |   |   | -- |   |   |   | -- | (1) |
| James Alexander        |   | 20102009 |   |                                     | --       |   |        |   | --        |                 |   |   | --                                        |   |   |                              | --        |   |   |   | --        |   |   |   | -- |   |   |   | -- |   |
| Frank Power            |   | 20102009 |   |                                     | --       |   |        |   | --        |                 |   |   | --                                        |   |   |                              | --        |   |   |   | --        |   |   |   | -- |   |   |   | -- |   |
| William A. Retz   |   | 20102009 |   |                                     | --       |   |        |   | --        |                 |   |   | --                                        |   |   |                              | --        |   |   |   | --        |   |   |   | -- |   |   |   | -- |   |
| Johan Perslow          |   | 20102009 |   |                                     | --       |   |        |   | --        |                 |   |   | --                                        |   |   |                              | --        |   |   |   | --        |   |   |   | -- |   |   |   | -- |   |
| Rodney Anderson        |   | 20102009 |   |                                     | --       |   |        |   | --        |                 |   |   | 28,30341,847                              |   |   |                              | --        |   |   |   | --        |   |   |   | -- |   |   |   | 28,30341,847 | (2)(3) |
| John Pavia             |   | 20102009 |   |                                     |  -- |   |        |   |   -- |                 |   |   | -117,156                                  |   |   |                              |   -- |   |   |   |   -- |   |   |   |   -- |   |   |   | -117,156 | (4) |

| Name and Title                                                  |   | Form    |   | Transactions                                                                                                                                                                                                                                  |
|-----------------------------------------------------------------|--------|---------|--------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|                                                            |   |    |   |                                                                                                                                                                                                                                          |
| James R. Currier, Chief Executive Officer and director          |   | 3 and 4 |   | Mr. Currier was appointed as a director in December 2009 but failed to timely file a Form 3.  He also failed to timely file 2 Form 4s covering 4 transactions.                                                                      |
| James W. Alexander, director                                    |   | 4       |   | Mr. Alexander failed to timely file Form 4s disclosing 7 transactions in which he engaged between August 26, 2010 and September 21, 2010.  Mr. Alexander filed a Form 4 disclosing all of these transactions on September 30, 2010. |
|                                                            |   |    |   |                                                                                                                                                                                                                                          |
| David R. Wells, President, Chief Financial Officer and director |   | 3 and 4 |   | Mr. Wells was appointed as a director in December 2009 but failed to timely file a Form 3.  He also failed to timely file 4 Form 4s covering 4 transactions.                                                                        |
|                                                            |   |    |   |                                                                                                                                                                                                                                          |
| William Retz, director                                          |   | 3       |   | Mr. Retz was appointed as a director in June 2010, but failed to timely file a Form 3.                                                                                                                                                        |
|                                                            |   |    |   |                                                                                                                                                                                                                                          |
| Johan Perslow, director                                         |   | 3       |   | Mr. Perslow was appointed as a director in June 2010, but failed to file a Form 3.                                                                                                                                                            |
|                                                            |   |    |   |                                                                                                                                                                                                                                          |
| Frank Power, director                                           |   | 3       |   | Mr. Power was appointed as a director in March 2009, but failed to file a Form 3.                                                                                                                                                             |

----

| No. |   | Description |
|-----|--------|-------------|

| 2.1        |   | Agreement and Plan of Merger dated July 1, 2003 (1)                                                                                                                                   |
|------------|--------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 3.1   |   | Amended and Restated Articles of Incorporation (1)                                                                                                                                    |
| 3.2   |   | Amended and Restated Bylaws (1)                                                                                                                                                       |
| 10.1       |   | Form of Securities Purchase Agreement, dated as of June 18, 2007, between the registrant and certain investors (2)                                                                    |
| 10.2       |   | Form of Convertible Debenture, dated as of June 18, 2007, issued by the registrant to certain investors. (2)                                                                          |
| 10.3       |   | Form of Registration Rights Agreement, dated as of June 18, 2007, between the registrant and certain investors (2)                                                                    |
| 10.4       |   | Form of Warrant, dated as of June 18, 2007, issued by the registrant to certain investors. (2)                                                                                        |
| 10.5       |   | Termination Agreement dated March 14, 2008 between the registrant and the shareholders of RJ Metals, Inc. (4)*                                                                        |
| 10.6       |   | Indemnification Agreement between the registration and Richard H. Papalian (3)**                                                                                                      |
| 10.7       |   | Notice of Grant of Stock Option to David Ross (5)**                                                                                                                                   |
| 10.8       |   | Stock Option Agreement between the registrant and David Ross (5)**                                                                                                                    |
| 10.9       |   | Notice of Grant of Stock Option to Rodney Anderson (5)*                                                                                                                               |
| 10.10      |   | Stock Option Agreement between the registrant and Rodney Anderson (5)**                                                                                                               |
| 10.11      |   | Form of Securities Purchase Agreement for 12% Convertible Debentures (6)                                                                                                              |
| 10.12      |   | Sionix Corporation 12% Convertible Debenture due July 29, 2009 (6)                                                                                                                    |
| 10.13      |   | Form of Common Stock Purchase Warrant dated July 29, 2008 (6)                                                                                                                         |
| 10.14      |   | Form of Unit Offering Securities Purchase Agreement (7)                                                                                                                               |
| 10.15      |   | Form of Common Stock Purchase Warrant (7)                                                                                                                                             |
| 10.16      |   | Amended and Restated Promissory Notes with Calico Capital Management LLC, BRAX Capital LLC and Gene Salkin (8)                                                                        |
| 10.17      |   | Second Amended and Restated Convertible Promissory Notes dated March 17, 2008 with Calico Capital Management LLC, BRAX Capital LLC and Gene Salkin (9)                                |
| 10.18      |   | Form of Securities Purchase Agreement for 10% Debentures (10)                                                                                                                         |
| 10.19      |   | Form of Subordinated 10% Debenture (10)                                                                                                                                               |
| 10.20      |   | Form of Common Stock Purchase Warrant (10)                                                                                                                                            |
| 10.21      |   | Consulting Agreement dated February 21, 2008 between the registrant and John H. Foster, Ph.D. (11)**                                                                                  |
| 10.22      |   | Notice of Grant of Stock Option to John H. Foster (11)**                                                                                                                              |
| 10.23      |   | Stock Option Agreement between the registrant and Dr. John H. Foster (11)**                                                                                                           |
| 10.24      |   | Consulting Agreement dated February 21, 2008 between the registrant and Dr. W. Richard Laton (11)**                                                                                   |
| 10.25      |   | Notice of Grant of Stock Option (11)                                                                                                                                                  |
| 10.26      |   | Stock Option Agreement between the registrant and Dr. W. Richard Laton (11)**                                                                                                         |
| 10.27      |   | Letter Agreement dated October 14, 2008 between the registrant and RJ Metals Inc. (5)**                                                                                               |
| 10.28      |   | Waiver and Amendment Agreement dated August 13, 2009 between the registrant and all current and past holders of Secured Convertible Promissory Notes issued by the registrant (12)    |
| 10.29      |   | Waiver, Consent and Securities Modification Agreement dated October 22, 2009 by and among the registrant and investors who hold debentures and warrants issued by the registrant (13) |
| 10.30      |   | Employment Agreement dated December 16, 2009 between the registrant and James R. Currier (14)*                                                                                        |
| 10.31      |   | Employment Agreement dated December 16, 2009 between the registrant and David R. Wells (14)*                                                                                          |
| 10.32      |   | Form of Securities Purchase Agreement for December 2009 10% Debentures  (14)                                                                                                     |
| 10.33      |   | Form of Subordinated 10% Debenture (14)                                                                                                                                               |
| 10.34      |   | Form of Common Stock Purchase Warrant (14)                                                                                                                                            |
| 10.35      |   | System Purchase Agreement dated August 6, 2010 between the registrant and Wenning Poultry, Inc. (16)                                                                                  |
| 10.36      |   | Settlement Agreement dated August 18, 2010 between the registrant and Ascendiant Capital Group, LLC (15)                                                                              |
| 10.37      |   | Form of Securities Purchase Agreement entered into on August 4, 2010 (16)                                                                                                             |
| 10.38      |   | Form of Warrant Agreement entered into on August 4, 2010 (16)                                                                                                                         |
| 10.39      |   | Form of Securities Purchase Agreement entered into on August 30, 2010 ( 17 )                                                                                                          |
| 10.40      |   | Form of Warrant Agreement entered into on August 30, 2010 ( 17 )                                                                                                                      |
| 31.1       |   | Certification of Chief Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.                                                                                   |
|  31.2 |   | Certification of Chief Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.                                                                              |
|  32.1 |   | Certification of Chief Executive Officer Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.                                                                                   |
|  32.2 |   | Certification of Chief Financial Officer Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.                                                                                   |

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|           | SIONIX CORPORATION |                      |
|----------------|--------------------|---------------------------|
|           |               |                      |   |
| August 2, 2011 | By:                | /s/ James R. Currier |   |
|           |               | James R. Currier          |   |
|           |               | Chief Executive Officer   |   |
|           |               |                      |   |

|           |   |                                  |
|----------------|--------|---------------------------------------|
|           |   |                                  |   |
| August 2, 2011 | By:    | /s/ David R. Wells               |   |
|           |   | David R. Wells                        |   |
|           |   | President and Chief Financial Officer |   |
|           |   |                                  |   |

| Signature            |   | Title                                           |   | Date           |
|----------------------|--------|-------------------------------------------------|--------|----------------|
|                 |   |                                            |   |           |
| /s/ James R. Currier |   | Chief Executive Officer and Chairman            |   | August 2, 2011 |
| James R. Currier     |   |                                            |   |           |
|                 |   |                                            |   |           |
| /s/ David R. Wells   |   | President, Chief Financial Officer and Director |   | August 2, 2011 |
| David R. Wells       |   |                                            |   |           |
|                 |   |                                            |   |           |
| /s/ James Alexander  |   | Director                                        |   | August 2, 2011 |
| James Alexander      |   |                                            |   |           |

| /s/ Frank Power     |   | Director |   | August 2, 2011 |
|---------------------|--------|----------|--------|----------------|
| Frank Power         |   |     |   |           |
|                |   |     |   |           |
| /s/ William A. Retz |   | Director |   | August 2, 2011 |
| William A. Retz     |   |     |   |           |
|                |   |     |   |           |
| /s/ Johan Perslow   |   | Director |   | August 2, 2011 |
| Johan Perslow       |   |     |   |           |