|                                              |  |                              |  |                                 |  |  |  |  |  |  |  |  |  |  |
|----------------------------------------------|--|------------------------------|--|---------------------------------|--|--|--|--|--|--|--|--|--|--|
| Florida                                      |  | 000-26058               |  | 59-3264661                      |
| State or other jurisdiction of incorporation |  | Commission File Number  |  | IRS Employer Identification No. |

|        |                                                                                             |  |  |  |  |
|--------|---------------------------------------------------------------------------------------------|--|--|--|--|
|  ̈ | Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)  |

|        |                                                                                              |  |  |  |  |
|--------|----------------------------------------------------------------------------------------------|--|--|--|--|
|  ̈ | Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)  |

|        |                                                                                                              |  |  |  |  |
|--------|--------------------------------------------------------------------------------------------------------------|--|--|--|--|
|  ̈ | Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))  |

|        |                                                                                                              |  |  |  |  |
|--------|--------------------------------------------------------------------------------------------------------------|--|--|--|--|
|  ̈ | Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))  |
|        |                                                                                                              |

----

|                |  |                                                          |  |  |  |  |  |  |
|----------------|--|----------------------------------------------------------|--|--|--|--|--|--|
| Exhibit Number |  | Description                                         |
|                |  |                                                          |
| 99.1           |  | Earnings Release of Kforce Inc. dated 10/31/2018 |

----

|                 |                  |                    |                                                       |  |  |  |  |  |  |  |  |
|-----------------|------------------|--------------------|-------------------------------------------------------|--|--|--|--|--|--|--|--|
|                 |                  |                    |                                                       |
|                 |                  | KFORCE INC.   |                                                       |
|                 |                  | (Registrant)  |                                                       |
|                 |                  |                    |                                                       |
| Date:  | October 31, 2018 | By:       | /s/ DAVID M. KELLY                       |
|                 |                  |                    | David M. Kelly,                                  |
|                 |                  |                    | Senior Vice President, Chief Financial Officer   |
|                 |                  |                    | (Principal Financial Officer)                    |
|                 |                  |                    |                                                       |
|                 |                  | KFORCE INC.   |                                                       |
|                 |                  | (Registrant)  |                                                       |
|                 |                  |                    |                                                       |
| Date:  | October 31, 2018 | By:       | /s/ JEFFREY B. HACKMAN                   |
|                 |                  |                    | Jeffrey B. Hackman,                              |
|                 |                  |                    | Senior Vice President, Finance & Accounting  |
|                 |                  |                    | (Principal Accounting Officer)                   |