----

----

| Delaware                                                      | 26-0225130                          |
|---------------------------------------------------------------|-------------------------------------|
| (State or other jurisdiction ofincorporation or organization) | (I.R.S. EmployerIdentification No.) |

| 14 Philips Parkway, Montvale, NJ  07645          |
|------------------------------------------------------------|
| (Address of principal executive offices) (Zip code)        |
|                                                       |
| (800) 942-5550                                             |
| (Registrant’s telephone number, including area code) |

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

----

----

----

----

| EXHIBIT |   |                                                                                                                                                                                                                                                    |   |                                                                    |
|---------|--------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|-------------------------------------------------------------------------|
| NUMBER  |   | TITLE OF EXHIBIT                                                                                                                                                                                                                                        |   | METHOD OF FILING                                                        |
|    |   |                                                                                                                                                                                                                                                    |   |                                                                    |
| 3.1     |   | Articles of Formation of Ridgewood Energy W Fund, LLC dated May 17, 2007                                                                                                                                                                                |   | Incorporated by reference to the Fund's Form 10 filed on April 18, 2008 |
|    |   |                                                                                                                                                                                                                                                    |   |                                                                    |
| 3.2     |   | Limited Liability Company Agreement between Ridgewood Energy Corporation and Investors of Ridgewood Energy W Fund, LLC dated June 15, 2007                                                                                                              |   | Incorporated by reference to the Fund's Form 10 filed on April 18, 2008 |
|    |   |                                                                                                                                                                                                                                                    |   |                                                                    |
| 31.1    |   | Certification of Robert E. Swanson, Chief Executive Officer of the Fund, pursuant to Securities Exchange Act Rule 13a-14(a)                                                                                                                             |   | Filed herewith                                                          |
|    |   |                                                                                                                                                                                                                                                    |   |                                                                    |
| 31.2    |   | Certification of Kathleen P. McSherry, Chief Financial Officer of the Fund, pursuant to Securities Exchange Act Rule 13a-14(a)                                                                                                                          |   | Filed herewith                                                          |
|    |   |                                                                                                                                                                                                                                                    |   |                                                                    |
| 32      |   | Certifications pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of The Sarbanes-Oxley Act of 2002, signed by Robert E. Swanson, Chief Executive Officer of the Fund and Kathleen P. McSherry, Chief Financial Officer of the Fund |   | Filed herewith                                                          |
|    |   |                                                                                                                                                                                                                                                    |   |                                                                    |
| 99      |   | Report of Ryder Scott Company, L.P.                                                                                                                                                                                                                     |   | Filed herewith                                                          |

----

|                       | RIDGEWOOD ENERGY W FUND, LLC |                             |
|----------------------------|------------------------------|----------------------------------|
|                       |                         |                             |   |
|                       |                         |                             |   |
| Date: August 23, 2010 | By:                          | /s/ ROBERT E. SWANSON  |   |
|                       |                         | Robert E. Swanson                |   |
|                       |                         | Chief Executive Officer          |   |
|                       |                         | (Principal Executive Officer)    |   |

| Signature                            | Capacity                                                                                  | Date                  |
|--------------------------------------|-------------------------------------------------------------------------------------------|-----------------------|
|                                 |                                                                                      |  August 23, 2010 |
| /s/ ROBERT E. SWANSON                | Chief Executive Officer  (Principal Executive Officer)                          |
| Robert E. Swanson                    |                                                                                      |
|                                 |                                                                                      |                  |
|                                 |                                                                                      |                  |
| /s/ KATHLEEN P. MCSHERRY             |  Executive Vice President and Chief Financial Officer (Principal Accounting Officer) | August 23, 2010       |
| Kathleen P. McSherry                 |                                                                                      |
|                                 |                                                                                      |                  |
| RIDGEWOOD ENERGY CORPORATION         |                                                                                      |                  |
|                                 |                                                                                      |                  |
| BY:  /s/ ROBERT E. SWANSON |  Chief Executive Officer of Manager                                                  | August 23, 2010       |
| Robert E. Swanson                    |                                                                                      |                  |
|                                 |                                                                                      |                  |

----