Company: ASTE
Filing Date: 2025-08-06
Form Type: S-8
Source: 0001104659-25-074781
Chunk: 0

Company: ASTEC INDUSTRIES INC
Filing Date: 2025-08-06
Form: S-8
Chunk 0
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<div align='center'>As filed with the Securities and Exchange Commission on August 6, 2025.</div>

Registration No. 333-_____

<div align='center'>UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM S-8

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

ASTEC INDUSTRIES, INC.

(Exact Name of Registrant as Specified in its
Charter)</div>

| Tennessee                       |     | 62-0873631          |
| (State or Other Jurisdiction of |     | (I.R.S. Employer    |
| Incorporation or Organization)  |     | Identification No.) |

<div align='center'>1725 Shepherd Road

Chattanooga, Tennessee 37421
(423) 899-5898 (Address, Including Zip Code, of Principal Executive Offices)

Astec Industries, Inc. 2025 Equity Incentive Plan

(Full Title of the Plan)</div>

| Terrell Gilbert                                                          
 General Counsel and Corporate Secretary                                  
 Astec Industries, Inc.                                                   
 1725 Shepherd Road                                                       
 Chattanooga, Tennessee 37421                                             
 Telephone: (423) 899-5898                                                
 (Name, Address, Including Zip Code, and Telephone Number, Including Area 
 Code, of Agent for Service)                                              | With a copy to:            
 John B. Shannon, Esq.      
 Alston & Bird LLP          
 1201 West Peachtree Street 
 Atlanta, Georgia 30309     
 (404) 881-7000             |

Indicate by check mark whether
the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging
growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting
company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

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

If an emerging growth company, indicate by check
mark if the registrant has elected not to use the extended transition period for complying with