Company: ACA
Filing Date: 2025-04-01
Form Type: DEF 14A
Source: 0001739445-25-000058
Chunk: 0

Company: Arcosa, Inc.
Filing Date: 2025-04-01
Form: DEF 14A
Chunk 0
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### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549
<div align='center'>________________________</div>

#### SCHEDULE 14A INFORMATION

#### Proxy Statement Pursuant to Section 14(a) of the

#### Securities Exchange Act of 1934
<div align='center'>(Amendment No. )

________________________</div>

| Filed by the Registrantþ   |     |                                                                                 |     | Filed by a party other than the Registrant¨ |
| Check the appropriate box: |     |                                                                                 |     |                                             |
| ¨                          |     | Preliminary Proxy Statement                                                     |     |                                             |
| ¨                          |     | Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) |     |                                             |
| þ                          |     | Definitive Proxy Statement                                                      |     |                                             |
| ¨                          |     | Definitive Additional Materials                                                 |     |                                             |
| ¨                          |     | Soliciting Material Pursuant to §240.14a-12                                     |     |                                             |

#### Arcosa, Inc.
<div align='center'>(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): |     |                                                                                                     |
| þ                                                  |     | No fee required.                                                                                    |
| ¨                                                  |     | Fee paid previously with preliminary materials.                                                     |
| ¨                                                  |     | Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11 |

|              |     | Arcosa, Inc.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
 Chairman Letter                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
 Dear Fellow Shareholders:                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
 We are pleased to invite you to our Annual Meeting of Shareholders on Wednesday, May 14, 2025 at 8:30 a.m., Central Daylight Time. The Annual Meeting of Shareholders will be held virtually through a live, audio-only webcast. Shareholders will be able to participate, listen, vote, and submit questions from any remote location with internet connectivity. A notice of the meeting and a proxy statement containing information about the matters to be acted upon are attached to this letter. 
 Your vote is important to us. Whether or not you plan to attend virtually