| Delaware                                                      | 20-5997364                          |
|---------------------------------------------------------------|-------------------------------------|
| (State or other jurisdiction ofincorporation or organization) | (I.R.S. EmployerIdentification No.) |

| Title of each class             | Name of each exchange on which registered |   |
|---------------------------------|-------------------------------------------|--------|
| Common Stock, $0.0001 par value | Nasdaq Global Market                      |   |

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

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|  Item 5. | Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities |
|--------------------|--------------------------------------------------------------------------------------------------------------------|

|           |         |   |         |         |   |   |
|----------------|--------------|--------|--------------|--------------|--------|--------|
|           |    | High   |    | Low          |
| 2009           |    |   |         |    |   |   |
| First Quarter  |    | $      | 6.94         |    | $      | 1.83   |
| Second Quarter |    | $      | 7.00         |    | $      | 3.90   |
| Third Quarter  |    | $      | 6.25         |    | $      | 4.05   |
| Fourth Quarter |    | $      | 6.58         |    | $      | 4.58   |
|           |         |   |
| 2010           |    |   |         |    |   |   |
| First Quarter  |    | $      | 7.45         |    | $      | 4.95   |
| Second Quarter |    | $      | 7.73         |    | $      | 5.07   |
| Third Quarter  |    | $      | 7.58         |    | $      | 5.31   |
| Fourth Quarter |    | $      | 7.15         |    | $      | 6.88   |

----

|                                      |   | 8/16/06 |   |   | 12/31/06 |   |   | 12/31/07 |   |   | 12/31/08 |   |   | 12/31/09 |   |   | 12/31/10 |   |
|-------------------------------------------|--------|---------|--------|--------|----------|--------|--------|----------|--------|--------|----------|--------|--------|----------|--------|--------|----------|--------|
| INWK                                      |   | $       | 100    |   |     | $      | 156    |     |   | $      | 168      |   |   | $        | 64     |   |     | $      | 58 |   |   | $ | 64 |   |
| NASDAQ Market Index                       |   | $       | 100    |   |     | $      | 112    |     |   | $      | 123      |   |   | $        | 73     |   |     | $      | 106 |   |   | $ | 123 |   |
| Dow Jones Business Support Services Index |   | $       | 100    |   |     | $      | 113    |     |   | $      | 112      |   |   | $        | 79     |   |     | $      | 94 |   |   | $ | 106 |   |

----

|  Item 15. | Exhibits, Financial Statement Schedules |
|---------------------|-----------------------------------------|

| 31.1   |   | Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act 2002.    |
|------------------|--------|----------------------------------------------------------------------------------------------------------|
|             |   |                                                                                                     |
| 31.2   |   | Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. |

----

| INNERWORKINGS, INC. |
|--------------------------|
|                     |   |
| By:                      |   | / S /    ERIC D. BELCHER         |
|                     |   | Eric D. Belcher |
| Title:                   |   | Chief Executive Officer and President |

|                                                                                                                    |         |                                                                          |   |                |
|-------------------------------------------------------------------------------------------------------------------------|--------------|-------------------------------------------------------------------------------|--------|---------------------|
| Signature                                                                                                               |    | Title                                                                         |   | Date                |
|                                                                                                                         |         |                                                                               |   |                     |
|                                                                                                                    |         |                                                                          |
| / S /    ERIC D. BELCHER        Eric D. Belcher             |    | President, Chief Executive Officer and Director (principal executive officer) |   | April 29, 2011 |
|                                                                                                                         |         |                                                                          |   |                |
|                                                                                                                    |         |                                                                          |
| / S /    JOSEPH M. BUSKY        Joseph M. Busky             |    | Chief Financial Officer (principal financial and accounting officer)          |   | April 29, 2011 |
|                                                                                                                         |         |                                                                          |   |                |
|                                                                                                                    |         |                                                                          |
| / S /    JACK M. GREENBERG        Jack M. Greenberg         |    | Chairman of the Board                                                         |   | April 29, 2011 |
|                                                                                                                         |         |                                                                          |   |                |
|                                                                                                                    |         |                                                                          |
| / S /    JOHN R. WALTER        John R. Walter               |    | Director                                                                      |   | April 29, 2011 |
|                                                                                                                         |         |                                                                          |   |                |
|                                                                                                                    |         |                                                                          |
| / S /    PETER J. BARRIS        Peter J. Barris             |    | Director                                                                      |   | April 29, 2011 |
|                                                                                                                         |         |                                                                          |   |                |
|                                                                                                                    |         |                                                                          |
| / S /    SHARYAR BARADARAN        Sharyar Baradaran         |    | Director                                                                      |   | April 29, 2011 |
|                                                                                                                         |         |                                                                          |   |                |
|                                                                                                                    |         |                                                                          |
| / S /    LINDA S. WOLF        Linda S. Wolf                 |    | Director                                                                      |   | April 29, 2011 |
|                                                                                                                         |         |                                                                          |   |                |
|                                                                                                                    |         |                                                                          |
| / S /    CHARLES K. BOBRINSKOY        Charles K. Bobrinskoy |    | Director                                                                      |   | April 29, 2011 |
|                                                                                                                         |         |                                                                          |   |                |
|                                                                                                                    |         |                                                                          |
| / S /    ERIC P. LEFKOFSKY        Eric P. Lefkofsky         |    | Director                                                                      |   | April 29, 2011 |
|                                                                                                                         |         |                                                                          |   |                |

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