Company: ASGN
Filing Date: 2025-04-11
Form Type: PRE 14A
Source: 0000890564-25-000017
Chunk: 0

Company: ASGN Inc
Filing Date: 2025-04-11
Form: PRE 14A
Chunk 0
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### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION
<div align='center'>Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of

the Securities Exchange Act of 1934 (Amendment No. ___ )</div>

Filed by the Registrant x

Filed by a Party other than the Registrant o

Check the appropriate box:

| x |     | Preliminary Proxy Statement                                                     |
| o |     | Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) |
| o |     | Definitive Proxy Statement                                                      |
| o |     | Definitive Additional Materials                                                 |
| o |     | Soliciting Material under §240.14a-12                                           |

<div align='center'>ASGN Incorporated

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)</div>

Payment of Filing Fee (Check the appropriate box):

| x |     | No fee required. |

| o |     | Fee paid previously with preliminary materials. |

| o |     | Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11. |

<div align='center'>4400 Cox Road, Suite 110

Glen Allen, Virginia 23060

April 11, 2025</div>

Dear Fellow Stockholder:

On behalf of your Board of Directors and management, you are cordially invited to attend the 2025 Annual Meeting of Stockholders (the “Annual Meeting”) of ASGN Incorporated (the “Company” or “ASGN”), at which you will be asked to vote upon:

| 1. 
 2. 
 3. |     | the election of Brian J. Callaghan, Theodore S. Hanson, Maria R. Hawthorne and Edwin A. Sheridan, IV, as directors for three-year terms to expire at our 2028 Annual Meeting of Stockholders; 
 an advisory vote to approve the Company's named executive officer compensation for the year ended December 31, 2024;                                                                          
 approval of the Company's First Amendment to the Second Amended and Restated 2010 Incentive Award Plan;                                                                                       |
|:---|:----|:----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 4. |     | approval of the Company